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Non-standard bearings manufacturer of smelting quality and surface decarburization layer requirements

by:Waxing     2020-11-15
Non-standard bearings manufacturer of smelting quality and surface decarburization layer source: bearing | last updated: - 2020 09 - About 5% of chromium and contains a small amount of manganese and silicon hypereutectoid steel. Chromium heat treatment can improve performance, increase the hardenability, uniformity, tempering stability, and can improve the anti-corrosion properties of steel and grinding performance. 65% when, after quenching can increase the retained austenite in the steel, reduce hardness and dimensional stability, increase the inhomogeneity of carbide lower impact toughness and fatigue strength of steel. Therefore, high carbon chromium content in chromium non-standard bearing steel general control under,65%1. Only in the strict control of non-standard bearing steel chemical composition, can satisfy the non-standard bearing performance were obtained through the heat treatment process and hardness. Non-standard bearing steel smelting surface decarburization layer requirements in non-standard bearing material standard of the decarburization layer of the steel surface has strict rules, if the surface decarburization layer beyond the prescribed scope of the standard, and before the heat treatment process, and there is no clear away all the, is in the process of heat treatment quenching is prone to quenching crack, cause scrap parts. Other requirements in non-standard bearing steel material standard of non-standard bearing steel smelting method, hardness, fracture, oxygen content and annealing residual elements, spark test, delivery status, identity, and so on have strict requirements.
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