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关于渗碳层的碳浓度,过去的标准中大都规定为0.8~1.05%C,但综观近阶段的研究资料,却出现了一个向两极分化的趋势。一是高浓度渗碳以提高材料的耐磨性,二是共析浓度渗碳以消除高温碳化物的形成。在此,本文拟从奥氏体晶粒度的角度谈谈对渗碳层碳浓度的一些看法。众所周知,钢铁零件淬火后的奥氏体晶粒度,对材料的机械性能具有很大的影响,随奥氏体晶粒的粗化,材料的疲劳极限、屈服强度、冲击韧性和破断抗力等性能均随之
Regarding the carbon concentration of the carburized layer, most of the standards in the past were stipulated to be 0.8 to 1.05% C, but a comprehensive view of recent research data showed a tendency toward polarization. First, high concentration carburizing to improve the wear resistance of the material, the second is the eutectoid concentration carburizing to eliminate the formation of high temperature carbides. In this paper, we intend to talk about the carbon concentration of carburized carbides from the perspective of austenite grain size. As we all know, austenite grain size after quenching of steel parts, the mechanical properties of the material has a great impact, with the austenite grain coarsening, the material fatigue limit, yield strength, impact toughness and breaking resistance and other properties Followed by