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					                                 Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                      .
                                           Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                        E-mail: forging@bnmme.com    equip@bnmme.com
                                                                 URL: www.bnmme.com
                                                                       www.bnmme.ru


101       ALLOY CHILLLED CAST IRON ROLLS

Alloy chilled cast iron rolls(rings) is one kind of cast iron roll by making use of
super –cooling of model surface and adding Ni, Cr, Mo alloy elements. There is
no free graphite in the microstructure of the working layer, so it results in high
hardness and excellent wear resistance.

These type of material may be used to produce large scale rolls in double
pouring process, the barrel of rolls has high hardness while the neck has high
toughness, so these type of rolls exhibit the properies of high thermal stability
and resistance to accident.

Chemical composition(%)
 Symbol    Material             C         Si        Mn         Cr        Ni        Mo          V
  CC-1     Chilled            2.9-3.8   0.4-1.0    0.2-1.0   0.2-0.6     -        0.2-0.6      -
  CC-2     Chilled            2.9-3.8   0.4-1.0    0.2-1.0   0.2-0.6   0.5-1.0    0.2-0.6      -
  CC-3     Chilled            2.9-3.8   0.4-1.0    0.2-1.0   0.2-0.6   1.0-3.0    0.2-0.6      -
           Chilled /                                                                        (0.1-0.
  CC-4                        2.9-3.8   0.4-1.0    0.2-1.0   0.1-0.6     -        0.2-0.8
           nodular duplex                                                                     3)


Physical properties
                                                         Clear chilled depth (mm)
                               Tensile                 Section steel                    Plate steel
          Barrel      Neck
Symbol                         strength                                     ﹥
           HS          HS                            Φ201-2     Φ251-
                                 MPa      ≤Φ200                            Φ30      Sheet      Plate
                                                       50        300
                                                                            0
                                                                           20-4
 CC-1     58-70       32-48     ﹥150       12-25      15-30      17-35
                                                                            5
                                                                           20-4
 CC-2     62-75       35-52     ﹥150       12-25      15-30      17-35
                                                                            5
                                 ﹥                                         20-4
 CC-3     65-80       35-52                12-25      15-30      17-35
                              150(300)                                      5
 CC-4     60-70       35-48     ﹥300                                                 8-35       8-45



Microstructure:




Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                   Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                        .
                                             Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                          E-mail: forging@bnmme.com    equip@bnmme.com
                                                                   URL: www.bnmme.com
                                                                         www.bnmme.ru




CC-1,CC-2,CC-4, barrel 500X                      CC-3 barrel 500X
Fine pearlite + carbide                         pearlite + a little of bainite + carbide




CC-4 neck 100X
Pearlite + carbide


Application:
CC-1    The finishing stands of small bar, rod mills and narrow strip mills.
CC-2    The finishing stands of small bar, rod mills and narrow strip mills, stretch reducing
CC-3    rings for seamless tude mills.
CC-4    3-Hi plate mills, hot pack mills.


The capacity of making:
Type           Diameter of barrel (mm)      Length of barrel (mm)
Small          ≤Φ 550
Large scale    ≤Φ 900                       3000



102       ALLOY INDEFINITE CHILLED CAST IRON ROLLS

Alloy indefinite chilled cast iron rolls (rings) with distinct character of contain
minute graphite on their surface layer are different from chilled cast iron
rolls(rings). The graphite dispersed in the whole barrel's cross-section, its

Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                  Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                       .
                                            Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                         E-mail: forging@bnmme.com    equip@bnmme.com
                                                                  URL: www.bnmme.com
                                                                        www.bnmme.ru

amount and size increase with depth. We provide this type of rolls(rings) by
adding Mn,Cr, Mo and other alloy elements, with present of minute graphite, the
roll(ring) can be ensured being raised the properties of resistance to spalling,
firecrack and wear resistance while maintaining the surface hardness almost no
drop. The biting ability is also improved owing to the existence of minute
graphite porosity.

Chemical composition (%)
Symbol            Material           C         Si        Mn         Cr         Ni      Mo
 IC-1        CrMo indefinite      2.9-3.7   0.6-1.2     0.4-1.2   0.6-1.2      -      0.2-0.6
 IC-2       NiCrMo indefinite     2.9-3.7   0.6-1.2     0.4-1.2   0.7-1.2   0.5-1.5   0.2-0.6
 IC-3       NiCrMo indefinite     3.0-3.7   0.6-1.2     0.4-1.2   0.7-1.2   1.5-3.0   0.2-0.6


Physical properies:
Symbol                  Barrel hardness         Neck hardness            Tensile strength
                        HS                      HS                       MPa
IC-1                    58-70                   35-55                    ﹥160
IC-2                    62-72                   35-55                    ﹥160
IC-3                    68-75                   35-55                    ﹥160


Microstructure:

The general structure is nodular graphite and carbide well distributed on pearlitic matrix.




IC-1 IC-2 500X                                  IC-3 500X
Application:
IC-1       Rolls for intermediate and finishing stands of bar, rod mills and
           section mills.
IC-2       Rolls for intermediate and finishing stands of bar, rod mills and
IC-3       secton mills, stretch reducing for seamless tube mills.
The capacity of making:

Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                     Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                          .
                                               Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                            E-mail: forging@bnmme.com    equip@bnmme.com
                                                                     URL: www.bnmme.com
                                                                           www.bnmme.ru

Type                        Diameter of barrel                  Length of barrel
                            mm                                  mm
Rolls                       ≤Φ 650                              ≤ 1500
Rings                       Φ190-600                            400(max.)




103 ALLOY NODULAR CAST IRON ROOLS
Nodular cast iron rolls(rings) are characterized by the nodular shaped graphite
in the microstructure. Through adjusting the alloy elemengs of Ni, Cr, Mo and
heat treatment technique, the different type of rolls (rings) of popular nodular
graphite cast iron, large scale alloyed nodular graphite cast iron, pearlitic
nodular graphite cast iron and acicular nodular graphite cast iron can be
manufactured. All these types of rolls (rings) have high strength, excellent
thermal properties and resistance to accidents and there is very little hardness
drop in the surface work layer.

Chemical composition (%)
Symbol     C          Si             Mn         Cr         Ni            Mo         Mg
SGP-1      2.9-3.8    0.8-2.5        0.4-1.2    0.2-0.6    -             0.2-0.6    ≥0.04
SGP-2      2.9-3.8    0.8-2.5        0.4-1.2    0.2-0.6    0.2-2.5       0.2-0.6    ≥0.04
SGP-3      3.0-3.6    1.6-2.3        0.3-1.0    0.1-1.4    1.2-2.1       0.2-0.6    ≥0.04
SGP-4      3.0-3.6    1.0-2.4        0.2-1.0    0.5-1.2    1.0-3.5       0.2-0.8    ≥0.04
SGAC       3.0-3.6    1.2-2.4        0.2-0.8    0.2-1.0    3.2-4.5       0.3-1.0    ≥0.04


Physical properies:
Symbol    Barrel hardness       Uniformity ofhardness      Neck hardness       Tensile strength
          HS                    HS                         HS                  MPa
SGP-1     58-70                 -                          35-55               ﹥320
SGP-2     62-70                 -                          35-55               ﹥320
SGP-3     42-55                 ≤5                         32-43               ≥390
SGP-4     50-72                 ≤5                         35-55               ≥390
SGAC      55-75                 ≤5                         40-60               ≥400


Microstructure:




Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                  Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                       .
                                            Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                         E-mail: forging@bnmme.com    equip@bnmme.com
                                                                  URL: www.bnmme.com
                                                                        www.bnmme.ru




SGP-1 SGP-2 500X                                 SGP-3 500X
Pearlite + nodular graphite + carbide            Pearlite + nodular graphite + carbide




SGP-4 500X
Temper sorbite + nodular graphite + carbide




SGAC 500X
bainite +a little of martensite and residual austenite+ nodular graphite + carbide

Application:
SGP-1      Rolls for rough and intermediate stands of bar, rod and section
           mills, vertical rolls of beam mills.
SGP-2      Rolls for roughing and intermediate stands of bar, rod and section
           mills.
SGP-3      Rolls for blooming mills.


Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                    Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                         .
                                              Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                           E-mail: forging@bnmme.com    equip@bnmme.com
                                                                    URL: www.bnmme.com
                                                                          www.bnmme.ru

SGP-4     Rolls for roughing and intermediate stands of continuous section
          mills, bar, rod mills and seamless tube mills.
SGAC      Rolls for intermediate, finishing stands of continuous section mills,
          rolls and ring for seamless tube mills, rolls and rings for
          intermediate, prefinishing, finishing stands of bar, rod, screw mills.



The capacity of making:
Type        Diameter of barrel                Length of barrel
            mm                                mm
rolls       Can manufacture all kinds of rolls
rings       Φ190-1500                         900(max.)




104 HIGH Ni-Cr ALLOY INDEFINITE CHILLED CAST IRON
          ROLLS


High Ni-Cr duplex indefinite chilled iron rolls exhibit excellent properties which
are produced by centrifugal or over-flow casting process. The high
micro-hardness of matrix and carbide can ba obtained through adjusting the
content of Ni, Cr, Mo and other alloy elements. A fine and uniform shell layer
with a low hardness fall off can be obtained with special heat treatment
technique. As with a little of graphite, these rolls are much more resistant to
wearing, firecracking, spalling and pinching.

The shell depth may be varied to the particular application, and the core adopts
either grey iron with ductile or nodular iron with high strength, which can give
core and neck a satisfactory toughness.

The sufficient cooling water is essential on the working rolls.

Chemical composition (%)
Symbol      C             Si             Mn            Cr           Ni             Mo
HNiCr-1     2.8-3.5       0.6-1.1        0.4-1.1       1.6-2.0      4.0-4.5        0.2-0.8
HNiCr-2     3.0-3.5       0.7-1.2        0.5-1.2       1.4-1.8      3.8-4.5        0.2-0.8



Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                  Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                       .
                                            Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                         E-mail: forging@bnmme.com    equip@bnmme.com
                                                                  URL: www.bnmme.com
                                                                        www.bnmme.ru




Physical properties:
Symbol              Hardness     Tensile        Bending         Impact     Elastic
                    HS           strength       strength        value      modulus
                                 MPa            HS              ×104J/m2   kMPa
HNiCr-1             70-85        350-450        450-650         3-7        150-190
HNiCr-2             60-75        350-450        450-650         2-6        150-190
Grey                35-50        ﹥190           350             3-7        110-150
Nodular             35-50        ﹥350           550             4-7        160-190




Example of typical hardness profile:




Depth from surface (mm)


Microstructure:
HNiCr-1 bainite + a little of martensite + graphite + carbide
HNiCr-2 temper sorbite + bainite + graphite + carbide




Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                 Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                      .
                                           Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                        E-mail: forging@bnmme.com    equip@bnmme.com
                                                                 URL: www.bnmme.com
                                                                       www.bnmme.ru




graphite 50X                                       HNiCr-1 microstructure of shell 500X




HNiCr-2 microstructure of shell 500X
Application:
Work rolls for finishing final stands of hot strip mills.
Work rolls for roughing stands and finishing stands of wide plate mills.
Work rolls, back-up rolls for hot strip (plate) temper mills.
Work rolls for steckel mills.
Sleeves for pre-finishing stands of high-speed wire-rod mills.
Work rolls for non-ferrous plate mills.

The capacity of making:
Methods of making           Diameter of barrel   Length of barrel    Net weight
                            (mm)                 (mm)                (t)
Centrifugal process         Φ280-1350            400-4300            45
Over-flow casting process   Φ800-1300            ≤5500




105 HIGH CHROMIUM DUPLEX CAST ROLLS
Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                      Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                           .
                                                Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                             E-mail: forging@bnmme.com    equip@bnmme.com
                                                                      URL: www.bnmme.com
                                                                            www.bnmme.ru



High Cr duplex rolls use the high alloy cast steel (or iron) with up to 6~22% Cr
content as the shell's material, and use high strenght nodular iron as the core
material. According to the content of carbon, it can be devided into high Cr cast
steel rolls and high Cr cast iron rolls. Influenced by the high Cr content, its
carbide is M7C3 which has higher hardness, better toughness and extremely
good wear resistance than normal carbide. With the high alloy elements and
special heat treatment, the matrix has the excellent comprehensive properties
at high temperature.

According to the stand used and cooling water in the hot strop mills, high Cr
cast steel or high cast iron can be selected. These rolls can be used as the
working rolls in the cold mills and tempering mills, and the rings can also be
made of these material.

Chemical composition (%)
Symbol       C              Si              Mn          Cr            Ni         Mo
HCr-1        2.4-2.8        0.4-1.0         0.4-1.2     10-15         0.8-2.0    0.7-2.0
HCr-2        2.4-3.0        0.3-0.8         0.5-1.3     14-19         0.8-2.0    0.7-2.0
HCr-3        2.5-3.0        0.3-0.8         0.7-1.5     16-21         0.8-2.0    1.0-3.0
HCrS         0.6-1.4        0.4-1.0         0.2-1.0     6-15          0.2-1.0    1.0-3.0



Physical properties
Symbol           Hardness        Tensile          Bending       Impact value    Elastic
                 HS              strength         strength      ×104J/m2        molulus
                                 MPa              HS                            kMPa
HCr-1            60-70           500-800          700-1000      4-8             210-225
HCr-2            65-80           500-800          700-1000      4-8             210-225
HCr-3            78-92           600-900          900-1300      4-8             210-225
HCrS             65-85           700-1000                                       210-225
Neck             35-50           ﹥350             550           4-7             160-190




Examle of typical hardness profile:




Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                     Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                          .
                                               Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                            E-mail: forging@bnmme.com    equip@bnmme.com
                                                                     URL: www.bnmme.com
                                                                           www.bnmme.ru




Depth from surface (mm)

Microstructure:
HCr-1 troosite + temper sorbite + bainite + carbide
HCr-2 bainite + martensite + carbide
HCr-3 temper martensite + carbide + a little of secondary carbide
HCrS temper sorbite or martensite + carbide




HCr-1,2,3 shell           500X                         HCrS shell        500X

Application:
HCr-1          Work rolls for roughing stands of hot strip mills and wide plate mills.
HCr-2          Work rolls for early finishing stands of hot strip mills and rolls for
               bar, rod mills and seamless tube straitening mills.
HCr-3          Work rolls for cold strip mills and tempering mills.
HCrS           Work rolls for roughing and early stands of hot strip mills, for cold
               strip mills and plate mills.

The capacity of making:


Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                   Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                        .
                                             Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                          E-mail: forging@bnmme.com    equip@bnmme.com
                                                                   URL: www.bnmme.com
                                                                         www.bnmme.ru

Diameter of barrel    Length of barrel        Net weight
(mm)                  (mm)                    (t)
Φ280-1350             400-3100                35(max.)




201 ALLOY CAST STEEL ROLLS
Thest cast alloy steel rolls are made of high quality melted steel with arc furnace
and refiner, and correspondign with advanced casting and heat treament
procedure, and have very high tensile strength and good wearability, toughness
and resistance to firecrack.


Chemical composition (%)
Symbol        C            Si            Mn            Cr          Ni           Mo         V
 CS-1     0.55-0.80    0.20-1.00   0.50-1.30           -           -        0.40-1.50      -
 CS-2     0.55-0.80    0.20-1.00   0.40-1.30        0.50-1.50   0.20-1.00   0.40-1.50      -
 CS-3     0.35-0.55    0.20-1.00   0.20-1.00        2.50-3.50   0.20-1.00   0.20-1.00   0.02-0.40
 CS-4     0.40-0.60    0.20-1.00   1.00-1.80        1.00-2.00   0.20-1.00   1.00-1.80
 CS-5     0.95-1.20    0.20-1.00   0.70-1.50        0.50-1.50   0.50-1.50   0.40-1.50      -




Physical properties:
Symbol     Barrel           Tensile            Elongation        Impact value
           hardness         strength           %                 ×104J/m2
           HS               MPa
 CS-1      28-43            ≥600               ≥5                ≥8
 CS-2      30-45            ≥800               ≥5                ≥8
 CS-3      46-65            ≥800               ≥2                ≥5
 CS-4      45-65            ≥800               ≥3                ≥4
 CS-5      40-55            ≥700               ≥4                ≥7



Microstructure:
The microstructure of working layer is:
Pearlite or temper sorbite



Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                  Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                       .
                                            Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                         E-mail: forging@bnmme.com    equip@bnmme.com
                                                                  URL: www.bnmme.com
                                                                        www.bnmme.ru




Pearlite 500X                                           temper sorbite 500X


Application:
Blooming and slabbing mills, roughing and intermediate stands of section mills, vertical
scale-breaking and 2-Hi roughing stands of hot strip mills, 2-Hi roughing stands of plate
mills, the back-up rolls of narrow strip mills.




The capacity of making:
Diameter of barrel   Length of barrel      Net weight
(mm)                 (mm)                  (t)
Φ1500(max.)          3000(max.)            60(max.)




202 ADAMITE ROLLS
The adamite rolls include monobloc, duplex rolls and sleeves. Owing to the
alloy elements such as Mo, Cr, Ni etc. that have been added at higher carbon
scope and having applied to them special heat treatment, the rolls are given an
optimum combination of wearability, toughness and firecrack resistance. And
there is almost no hardness drop in the work layer of adamite rolls.

Chemical composition (%)
 Symbol          C           Si            Mn           Cr         Ni          Mo
  AD-1       1.20-1.60   0.30-1.00      0.60-1.40   0.50-1.20   0.20-1.20   0.20-0.80
  AD-2       1.45-1.85   0.30-1.00      0.60-1.40   0.80-2.00   0.20-1.20   0.20-0.80


Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                       Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                            .
                                                 Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                              E-mail: forging@bnmme.com    equip@bnmme.com
                                                                       URL: www.bnmme.com
                                                                             www.bnmme.ru

   AD-3        1.75-2.15   0.30-1.00      0.70-1.30   1.80-2.50   1.00-1.50   0.20-0.80
   AD-4        1.75-2.15   0.30-1.00      0.70-1.30   0.80-2.00   1.80-2.50   0.20-0.80
   AD-5        1.90-2.30   0.30-1.00      0.70-1.30   0.50-1.20   0.20-1.20   0.20-0.80
Rings core      ≥1.50          ≥1.20         -           -           -           -



Physical properties:
Symbol       Barrel hardness     Tensile strength       Elongation       Impact value
             HS                  MPa                    %                ×104J/m2
 AD-1        35-50               ≥500                   ≥1.0             ≥4
 AD-2        40-55               ≥450                   ≥1.0             ≥4
 AD-3        50-65               ≥350                   ≥0.5             ≥5
 AD-4        50-65               ≥350                   ≥0.5             ≥5
 AD-5        45-55               ≥350                   ≥0.5             ≥5


Example of typical hardness profile:




Depth from surface (mm)


Microstructure
The microstructure of working layer is:
Pearlite + carbide
Fine pearlite + a little of bainite + carbide




Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                     Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                          .
                                               Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                            E-mail: forging@bnmme.com    equip@bnmme.com
                                                                     URL: www.bnmme.com
                                                                           www.bnmme.ru

Matrix 500X                                            Matrix 500X
Pearlite + carbide                                     fine pearlite + a little of bainite + carbide

Application:
  Rolls for roughing, early finishing and vertical stands of hot strip mills, rolls for
roughing, intermediate and pre-finishing stands of section, beam and bar mills,
rings and sleeves for vertical and horizontal stands of universal and hang arm
mills.




The capacity of making:
Type of rolls        Diameter of barrel    Length of barrel           Net weight
                     (mm)                  (mm)                       (t)
Adamite rolls        Φ1500(max.)           3000(max.)                 60(max.)
Adamite rings        Φ1400(max.)           700(max.)                  7(max.)




203 GRAPHITE CAST STEEL ROLLS
The characteristics of graphite cast steel rolls are similar to adamite rolls, but it
makes a feature of presenting a small amount of graphite which increase the
resistance to firecrack and scale adhesion, and are suitable for blooming or
roughing operation.

Chemical composition (%)
Symbol          C             Si           Mn                Cr             Ni           Mo
 GS-1       1.2-1.4        1.0-1.6        0.5-1.2          0.4-1.2      0.2-1.5        0.2-0.5
 GS-2       1.4-1.6        1.0-1.6        0.5-1.2          0.4-1.2      0.2-1.5        0.2-0.5
 GS-3       1.6-1.8        1.0-1.6        0.5-1.2          0.4-1.2      0.2-1.5        0.2-0.5
 GS-4       1.8-2.0        1.0-1.6        0.5-1.2          0.6-1.6      0.2-1.5        0.2-0.5
 GS-5       2.0-2.2        1.0-1.6        0.5-1.2          0.6-2.0      0.2-1.5        0.2-0.5
            3.0-3.6        1.5-2.5        0.4-1.0          ﹤0.3          ﹤1.0          0.2-0.5
 Core
            0.3-0.5        0.2-0.6        0.4-0.8            -              -            -


Barrel hardness (HS)
Symbol          GS-1               GS-2             GS-3             GS-4           GS-5



Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                 Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                      .
                                           Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                        E-mail: forging@bnmme.com    equip@bnmme.com
                                                                 URL: www.bnmme.com
                                                                       www.bnmme.ru

HS             36-44          38-55         40-48          42-50         44-52



Mechanical properties:
Tensile strength,MPa          385-750
Bending strenth,MPa           585-920


Example of typical hardness profile:




Depth from surface (mm)




Matrix    500X                                  Graphite   50X


Microstructure:
Fine pearlite + nodular graphite + carbide

Application:
These rolls are being used on roughing stands of hot strip mill and roughing
stands of 2-Hi reversing plate mills.




Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                   Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                        .
                                             Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                          E-mail: forging@bnmme.com    equip@bnmme.com
                                                                   URL: www.bnmme.com
                                                                         www.bnmme.ru

These rolls are being used in blooming mills, billet mills, beam and shape steel
mills, and especially for the rolls with deep grooves and roughing stands of hot
strip mills.

The capacity of making:
Diameter of barrel   Length of barrel      Net weight
(mm)                 (mm)                  (t)
Φ1350(max.)          3100(max.)            50(max.)




204 DUPLEX CAST STEEL BACK-UP ROLLS
Duplex cast steel back-up rolls are made with double poured process with the
addition of Ni、Cr、Mo and adopting special heat treatment the shell structure is
tempered sorbite, bainite and a small amount of uniformly distributed fine
carbide. The material of core and neck of these duplex cast steel back-up rolls
are of high quality low carbon steel and low alloy steel. Therefore it possesses
the advantage of high resistance to wear, sufficient resistance to spalling and of
high toughness.

Chemical composition (%)
Symbol        C             Si             Mn                Cr              Ni    Mo
DCS-1      0.6-1.0       0.3-0.8         1.4-2.4           1.4-2.0      0.8-1.2   0.2-0.6
DCS-2      0.6-1.0       0.3-0.8         1.4-2.4           1.6-2.2      0.8-1.2   0.2-0.6
DCS-3      0.6-1.0       0.3-0.8         1.4-2.4           1.8-2.4      0.8-1.2   0.2-0.6
DCS-4      0.3-0.8       0.3-0.8         0.4-0.8           2.5-3.5      0.8-1.2   0.4-1.0



Hardness (HS)
Symbol         DCS-1               DCS-2             DCS-3             DCS-4
Barrel         50-60             55-65             60-70             65-75
Neck           25-45             25-45             25-45             25-45



Mechanical properties
Type                   Shell                       Neck
Tensile Strength ,     1200-2000                   min. 400



Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                 Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                      .
                                           Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                        E-mail: forging@bnmme.com    equip@bnmme.com
                                                                 URL: www.bnmme.com
                                                                       www.bnmme.ru

MPa
Yield strength ,       1000-1400            min. 200
MPa
Elongation,%           2-10                 10-30
Contraction,%          -                    15-40
Impact value,MPa       min. 7               min. 24



Example of typical hardness profile:




\
    Depth from surface (mm)


Microstructure:
The microstructure of working layer is:
Temper sorbite
Bainite + Temper sorbite




Matrix     500X


Application:



Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                     .
                                          Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                       E-mail: forging@bnmme.com    equip@bnmme.com
                                                                URL: www.bnmme.com
                                                                      www.bnmme.ru

Duplex cast steel back-up rolls are suitable for the roughing and finishing
stands of all types of cold and hot strip mills. This kind of rolls is also applied in
various types of plate and heavy plate mills and steckle mills.

The capacity of making:
Diameter of the barrel   Length of barrel    Net weight
(mm)                     (mm)                (t)
Φ900-1800                1000-3200           80




205 HIGH SPEED STEEL DUPLEX ROLLS
High speed steel (HSS) duplex rolls are manufactured with vertical centrifugal
casting process, the shell is HSS with high hardness and excellent wear
resistance at high temperature, the core is nodular cast iron with toughness, the
comprehensive property is a combination of high wear resistance and
toughness.

These rolls are manufactured with high content alloy elements and special heat
treatment process, the microstructure of shell is martensite and bainite with
plenty of carbides such as MC、M2C and M6C distributed among the matrix,
there is only a little hardness drop in the shell. High alloy elements and
rehardening give the rolls an excellent wear resistance at high temperature.
The outer layer hardness doesn't show a sigificant drop until the temperature
exceeds 550℃, and the wear resistance is 3~5 times higher than the traditional
high NiCr indefinite chilled iron rolls and high Cr iron rolls.


Chemical composition (%)
Symbol    C         Si        Mn        Cr        Ni        Mo        V          W
HSS-1     0.6-1.0   0.4-1.5   0.4-1.0   4.0-8.0   0.3-1.5   2.0-8.0   0.4-2.0    1.0-3.0
HSS-2     1.5-2.5   0.3-1.0   0.3-1.5   4.0-8.0   0.3-1.5   2.0-8.0   3.0-10.0   2.0-10.0




Physical properties
Symbol    Hardness        Tensile strength        Elastic modulus
                                                      3
          HS              MPa                     ×10 MPa


Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                 Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                      .
                                           Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                        E-mail: forging@bnmme.com    equip@bnmme.com
                                                                 URL: www.bnmme.com
                                                                       www.bnmme.ru

HSS-1     70-90           ≥750                    210-220
HSS-2     75-95           ≥750                    210-220
Neck      35-50           ≥350                    140-180




Example of typical hardness profile:




Depth from surface (mm)

Microstructure:
Martensite + bainite + carbide




Matrix 500X

Application:
Work rolls for finishing stands for hot strip mills, work rolls for cold strip mills,
rings or sleeves for bar, rod mills and universal H-section mills.

The capacity of making:

Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                     Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                          .
                                               Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                            E-mail: forging@bnmme.com    equip@bnmme.com
                                                                     URL: www.bnmme.com
                                                                           www.bnmme.ru

Type of rolls   Diameter of barrel        Length of barrel       Weight
                (mm)                      (mm)                   (t)
Rolls           Φ400-850                  1000-2500              15(max.)
Sleeves         Φ200-1400                 700(max.)              7(max.)




301 FORGED STEEL ROLLS FOR COLD MILLS
Forged steel rolls include work and back-up rolls for cold rolling. For this
purpose, the state-of-art facilities are employed in manufacturing these rolls, of
which are steel-making (EAF), refining(ESR or LF/VD)and forging (3150t
hydraulic press) equipment to produce the high quality forged steel blanks. As
for heat treatment equipment, the reproducibility of barrel hardness and the
depth of hardness are guaranteed by mean of the computer contronl; As for the
heat treatment procedure, we take on the pre-heat-treatment, the specific
induction-heating quenching(progressive or integral), the cold treatment and the
tempering, so as to provide the rolls with high and homogeneous hardness in
the work layer with superior wearability, high toughness and sufficient
resistance to accident, the depth of hardened layer may be over 30mm, so
when these high quality work rolls are applied on the modern wide cold strip
mills at home and abroad, the satisfactory performance have been obtained.

Chemical composition (%)
Symbol          C         Si         Mn        Cr        Ni         Mo        V
FSC-1           0.85-0.   0.25-0.    0.20-0.   1.70-2.   ≤0.25      0.20-0.   -
                95        45         35        10                   40
FSC-2           0.80-0.   0.15-0.    0.20-0.   1.80-2.   ≤0.25      0.20-0.   0.05-0.
                90        45         55        40                   40        15
FSC-3           0.80-0.   0.25-1.    0.20-0.   2.40-3.   ≤0.25      0.20-1.   0.05-0.
                95        00         70        50                   00        15
FSC-4           0.75-0.   0.20-1.    0.20-0.   2.80-3.   ≤0.80      0.15-0.   -
                95        00         50        60                   40
FSC-5           0.60-0.   0.30-0.    0.40-0.   2.50-3.   ≤0.80      0.20-0.   -
                80        80         90        50                   60
FSC-6           0.70-0.   0.20-0.    0.20-0.   4.00-6.   ≤0.80      0.15-1.   ≤0.35
                95        90         50        00                   20
FSC-7           0.80-1.   0.20-0.    0.20-0.   7.50-8.   ≤0.80      0.25-1.   0.10-0.
                00        90         40        50                   20        40

Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                     Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                          .
                                               Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                            E-mail: forging@bnmme.com    equip@bnmme.com
                                                                     URL: www.bnmme.com
                                                                           www.bnmme.ru

FSC-8           1.35-1.   ≤0.40      0.20-0.     11.0-1       -            0.40-1.   0.15-0.     0.30-0.
                70                   65          3.0                       00        30          60(Co)
FSC-9           0.33-0.   0.80-1.    0.20-0.     4.75-5.      -            1.10-1.   0.30-0.
                43        20         50          50                        60        60
FSC-10          0.80-0.   ≤0.40      ≤0.40       3.80-4.      -            4.50-5.   1.75-2.     5.50-6.
                90                               40                        50        20          75(W)
Barrel hardness (HS)
FSC-1     FSC-2     FSC-3    FSC-4       FSC-5       FSC-6        FSC-7     FSC-8     FSC-9      FSC-10
60-70     60-80     76-80    60-80       60-70       65-75        75-85     77-85     65-71      80-95
90-100    90-100    90-100   90-100      65-80       90-100       90-100    86-90     75-82


Hardening depth of barrel:
Diameter of barrel (mm)      ≥Φ 300                        Φ 301-600                  Φ 601-1020
Hardening depth (mm)         ≥8                            ≥ 10                       8-12
The minimum hardening depth of work rolls symbolized with FSC-1 can be guaranteed
respectively according to the nominal diameter as the table above, the hardening depth of work
rolls for other symbol will be provide according to bilateral agreement.


Application of forged steel rolls for cold rolling mills:
                                                                           FSC
    Mill type         Roll type
                                         1       2     3      4       5          6   7       8      9      10
                                  Rolls for cold plate and strp mills:
                      Work rolls         ●       ●     ●      ●                  ●
   4-Hi mills
                    Back-up rolls                ●     ●              ●
   2-Hi mills         Work rolls         ●       ●
                      Work rolls                              ●                  ●           ●             ●
                     Intermediate
    HC mills                                     ●     ●      ●       ●
                          rolls
                    Back-up rolls        ●       ●                    ●
                      Work rolls                                                                           ●
                           1st
                     intermediate                                                            ●      ●
                          rolls
 Multi-roll mills         2nd
                     intermediate                                                    ●       ●      ●
                      rolls(drive)
                          2nd
                                                                                             ●      ●
                     intermediare


Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                       Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                            .
                                                 Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                              E-mail: forging@bnmme.com    equip@bnmme.com
                                                                       URL: www.bnmme.com
                                                                             www.bnmme.ru

                      rolls (idler)
                    Back-up rolls                  ●
                                            Non-ferrous mills rolls
                      Work rolls             ●     ●     ●
   4-Hi mills
                    Back-up rolls            ●     ●             ●    ●
   2-Hi mills         Work rolls             ●     ●
                      Work rolls                   ●                                               ●
                           1st
                     intermediate                                                      ●       ●
                          rolls
                          2nd
 Multi-roll mills
                     intermediate                                                  ●   ●       ●
                      rolls(drive)
                    2nd intermediare
                                                                                       ●       ●
                    rolls (idler)
                    Back-up rolls                  ●


The capacity of making:
  Diameter of barrel(mm)         Length of barrel (mm)                Weight (t)
       Φ 1020(max.)                     3500(max.)                    12(max.)


Typical high quality product of forged steel roll-cold strip mill rolls
The cold strip mill is a modernistic and new type mills, since the quality
requirement of the strip steel products is very high, then the strict demands
have been put to the work rolls. The pratice proved that it appears a high rolling
tonnage between roll change, lower roll-consumption and long servce life, the
reputations have been gained from users.
Chemical composition:
In accordance with the stipulation of roll's symbol.

Hardening depth of barrel
Roll symbol                           FSC -2            FSC -3            FSC -4       FSC -6
Hardening depth (on radius)           ≥15               ≥20               ≥30          40-50


Example of typical hardness profile:




Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                            Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                 .
                                      Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                   E-mail: forging@bnmme.com    equip@bnmme.com
                                                            URL: www.bnmme.com
                                                                  www.bnmme.ru




Depth from surface (mm)
Microstructure:
The microstructure of barrel surface corresponding with high and homogeneous
hardness, consists of cryptocrystalline and fine acicular martensite, fine and
uniform carbide and a little of residual austenite.




FSC-2 500X                                FSC-4 500X




FSC-6 3000X


Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                     .
                                          Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                       E-mail: forging@bnmme.com    equip@bnmme.com
                                                                URL: www.bnmme.com
                                                                      www.bnmme.ru




302      FORGED STEEL ROLLS FOR HOT MILLS

The forged steel rolls for hot mills are manufactured with well chosen quality
forged steel blanks, special heat treatment is applied to make rolls in
satisfactory barrel hardness and hardening depth. While good wearability is
obtained, a comprehensive property of high toughness and excellent biting
ability is also achieved.
This type of rolls is used in the plate (strip) mills, among the various rolls, the
tube rolls is with a high quality and is rich in assortment, complete in
specification and wide in application. The technical properties of FSH-10 Butt
welded tube mill rolls have satisfactorily met the customer's requirement. The
quality of hyperbolic strainghtening rolls are in the leading position at domestic
market, recently the rolls and sleeves for non-ferrous casting mill have also
been developed successfully.

Chemical composition(%)
Symbol      C        Si        Mn        Cr        Ni        Mo        V         W
FSH-1       0.55-0   0.17-0.   0.50-1.   0.50-1.   ≤0.25     0.20-0.   -         -
            .65      40        00        20                  40
FSH-2       0.55-0   0.20-0.   0.60-1.   0.70-1.   1.50-2.   0.10-0.   -         -
            .65      40        00        00        00        30
FSH-3       0.45-0   0.20-0.   0.50-0.   3.00-3.   -         0.40-1.   0.10-0.   -
            .65      50        90        60                  20        35
FSH-4       0.60-0   0.30-0.   0.40-0.   2.50-3.   0.40-0.   0.20-0.   -         -
            .80      80        90        50        60        60
FSH-5       0.30-0   ≤0.40     ≤0.40     2.20-2.   -         -         0.20-0.   7.50-9.
            .40                          70                            50        00
FSH-6       0.32-0   0.80-1.   0.20-0.   4.50-5.   -         1.00-1.   0.30-0.   -
            .43      20        50        50                  60        60
FSH-7       0.80-0   0.25-0.   0.20-0.   1.70-2.   -         0.20-0.   ≤0.15     -
            .95      45        55        40                  40
FSH-8       0.13-0   ≤0.30     ≤1.00     0.80-1.   -         0.80-1.   0.15-0.   -
            .23                          20                  20        30
FSH-9       0.30-0   0.17-0.   0.25-0.   1.20-1.   3.00-3.   0.25-0.   0.10-0.   -
            .42      50        50        60        50        45        25
FSH-10      1.45-1   ≤0.40     ≤0.40     11.0-1    -         0.40-0.   0.15-0.

Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                                         Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                              .
                                                   Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                                E-mail: forging@bnmme.com    equip@bnmme.com
                                                                         URL: www.bnmme.com
                                                                               www.bnmme.ru

               .70                                2.5                     60           30


Barrel hardness (HS)
FSH-1       FSH-2    FSH-3       FSH-4      FSH-5       FSH-6     FSH-7        FSH-8        FSH-9   FSH-10
34-40       35-45    50-60       34-45      65-76       50-58     69-76        38-45        40-50   80-87
55-75       50-60    60-70       60-75      80-87       65-71     80-87


Microsructure:
Pearlite + carbide




FSH-1 Martrix 500X                                          FSH-10 Martrix      500X


Application of forged steel rolls for hot mills:
Mill type            Roll type                                                 FSH
                                              1         2     3    4      5      6      7       8    9      10
Plate mills          Primary rolls            ●         ●
Planetary mills      Work rolls                                           ●
                     Feed rolls               ●
                     Back-up rolls            ●
Welding tube         Forming, sizing                                                    ●
mills                and vertical rolls
Seamless tube        Extruding rolls                                      ●      ●                          ●
mills                Straitening rolls                                                  ●                   ●
Non-ferrous          Piercing rolls                                ●
plate and strip      Pushing point rolls                                                ●
mills                Work rolls                         ●     ●
                     Back-up rolls                            ●    ●
Non-ferrous casting-mills rolls                                                                 ●    ●
(sleeves)


The capacity of making:
Diameter jof barrel (mm)              Length of barrel (mm)               Weight(t)


Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.
                            Beijing New Metallurgical Machine & Equipment Co.,Ltd
                                                                                 .
                                      Tel:+86-10-58236807/05 Fax:+86-10-58236823
                                   E-mail: forging@bnmme.com    equip@bnmme.com
                                                            URL: www.bnmme.com
                                                                  www.bnmme.ru

Ф 1200 (max.)             3500 (max.)                 12 (max.)




Rm.Block C1201, KaiXuan Center No.170 Beiyuan Road,ChaoYang District
Beijing 100101 P.R.C.

				
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