Microwave Sintering of WC-Co Based Cemented Carbides by sofiaie

VIEWS: 55 PAGES: 14

									            MICROWAVE PROCESSING AND ENGINEERING CENTER




MICROWAVE SINTERING OF
        WC-Co
BASED CEMENTED CARBIDES




                                                 MRI
                          MICROWAVE PROCESSING AND ENGINEERING CENTER



        Rockwell A Hardness

 Co    Heating    Sintering
wt.%   Process     °C/time           ardness

 6      MW        1450/10min.            A
                                     88.25± 0.67

 6      Conv.      1450/1hr          81.80± 0.91

 12     MW       1300°C/10 min       88.87± 0.10

 12     Conv.      1300°C1h          84.84± 0.53

 12     MW       1350°C/10 min       87.16± 0.21

 12     Conv.    ~1440°C/~2h         86.32± 0.41
                                                               MRI
                          MICROWAVE PROCESSING AND ENGINEERING CENTER




        ABRASION RESISTANCE

     IMPROVED ABRASION RESISTANCE
20
18
16
14
12
10
8
6
4
2
0
     MICRO 1   MICRO 2    STD 1             STD     2
         STANDARD VS. MICROWAVE CARBIDE


                                                               MRI
                                MICROWAVE PROCESSING AND ENGINEERING CENTER




           EROSION RESISTANCE

        IMPROVED EROSION RESISTANCE


83.0%

82.0%

81.0%

80.0%

79.0%

78.0%

77.0%

76.0%

75.0%

74.0%
        MICRO - 1   MICRO - 2    STD - 1          STD - 2
             STANDARD VS. MICROWAVE CARBIDE



                                                                     MRI
                MICROWAVE PROCESSING AND ENGINEERING CENTER




IMPROVED EROSION RESISTANCE




MICROWAVE            CONVENTIONALLY
 SINTERED               SINTERED

                                                     MRI
                                                     MICROWAVE PROCESSING AND ENGINEERING CENTER




Improved Impact Strength
                                               4.5
                                                                                          High
                                                4                                         Average
                                                                                          Low
                                               3.5




                   Impact Survial Energy (J)
                                                3

                                               2.5

                                                2

                                               1.5

                                                1

                                               0.5

                                                0
                                                     BridgeTech              Sinter-Hip
                                                     MW Sintered               Sinter-HIP
Impact Apparatus




                                                                                                 MRI
                    MICROWAVE PROCESSING AND ENGINEERING CENTER



 COMPARISON OF CONVENTIONALLY AND
MICROWAVE SINTERED WC-Co DRILL PARTS

   IMPROVED IMPACT STRENGTH




 MICROWAVE                  CONVENTIONALLY
  SINTERED                     SINTERED

                                                         MRI
                               MICROWAVE PROCESSING AND ENGINEERING CENTER




IMPROVED CORROSION RESISTANCE

    MIRCOWAVE SINTERED CARBIDE EXHIBITS
       IMPROVED CORROSION RESISTANCE


    20
    18
    16
    14
    12
    10
     8
     6
     4
     2
     0
                MICRO                 STD
         STANDARD VS. MICROWAVE CARBIDE - 48 HOUR
                        EXPOSURE


                                                                    MRI
MICROWAVE PROCESSING AND ENGINEERING CENTER




                                     MRI
                           MICROWAVE PROCESSING AND ENGINEERING CENTER




  MICROWAVE SINTERED TSD COMPOSITE INSERTS




ABRASION RESISTANT TSD            Part 12154
MICROWAVE SINTERED IN    14.4mm DIAM x .12.7mm LONG
TUNGSTEN CARBIDE         3 TSD ELEMENTS 4mm DIAM.

                                                                MRI
                       MICROWAVE PROCESSING AND ENGINEERING CENTER



MICROWAVE SINTERED TUNGSTEN CARBIDE
       IMPROVED PROPERTIES


     • Fine grain structure
     • No grain growth inhibitors
     • Uniform cobalt distribution
     • Improved abrasion resistance
     • Improved erosion resistance
     • Improved corrosion resistance
     • Improved impact strength
     • More energy efficient process
     • Less capital intensive

                                                            MRI
                   MICROWAVE PROCESSING AND ENGINEERING CENTER




FROM IDENTICAL GREEN PARTS at 1500X




    MICROWAVE      CONVENTIONALLY
     SINTERED         SINTERED

                                                        MRI
MICROWAVE PROCESSING AND ENGINEERING CENTER




                                     MRI
MICROWAVE PROCESSING AND ENGINEERING CENTER




                                     MRI

								
To top