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(ⅲ)残余奥氏体残余奥氏体是轴承钢(与普通碳素钢相同)加热到830℃～850℃的奥氏体区后,在水中或油中淬火时产生的。按原国铁热处理标准进行热处理作业时,假设包括颗粒状碳化物在内百分之百从奥氏体区进行淬火的话,则大部分都能变成淬火马氏体,但有10％左右仍然保持原来的奥氏体相。它被称作残余奥氏体。这时的显微组织由淬火马氏体、颗粒状碳化物、残余奥氏体组成。这种状态在常
(Iii) Retained austenite Retained austenite is produced when bearing steel (same as ordinary carbon steel) is heated in the austenitic region at 830 ° C to 850 ° C and quenched in water or oil. According to the original national heat treatment standards for heat treatment operations, including the inclusion of granular carbides, including one hundred percent from the austenite region to be quenched, then most of them can become quenched martensite, but about 10% of the original Austenitic phase. It is called retained austenite. Microstructure at this time by the quenched martensite, granular carbide, retained austenite. This state of the regular