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通过生产积累及宏观、微观试验结果,探讨了淬火状态的GCr15钢球表层“黑色”组织的本质,认为有些“黑色”组织并不是屈氏体,而是马氏体。附图2幅。
Through the accumulation of production and the results of macroscopic and microscopic tests, the essence of the “black” structure of GCr15 steel balls in quenched state was discussed. Some “black” structures were not troostite, but martensite. Figure 2 Photo.