RESEARCH REGARDING THE CAUSES OF CRACKING WHEN ASSEMBLING SOME CAST PARTS OF ANTIFRICTION CAST-IRON by ProQuest

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The purpose of the work is that one of presenting some aspects regarding the quality of antifriction cast-iron and the technological management of casting which resulted in some items cracking during the assembling operations. The research has been performed on several specimens sampled from the breaking area of the damaged parts comparative to some other adequate ones. Chemical analysis, breakage aspect, breaking strength, structure, nature, spread and micro-hardness of structural constituents were analyzed. The laboratory analysis emphasized structural changes, which caused an advanced fragility of the material that lead to the cracking of the parts. The mechanical characteristics amounts and the breaking aspect confirmed results. Results corroboration allowed us to find out the causes of the damage as a consequence of the faulty casting technological management and incomplete thermal treatment. [PUBLICATION ABSTRACT]

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