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利用透射电子显微镜和扫描电子显微镜对Crl2MoV钢的组织结构进行了仔细分析,并从组织结构的角度出发,讨论了试验钢的接触疲劳性能和其它力学性能。试验结果表明:(1)碳化物的形状、大小和分布是影响Crl2MoV钢接触疲劳强度的最主要因素;(2)调整工艺制度时,钢的强度、塑性、韧性和接触疲劳强度均有所提高;(3)钢中残余奥氏体在接触疲劳应力作用下会转变成马氏体,部分残余奥氏体的转变对提高接触疲劳强度有利。
The microstructures of Crl2MoV steel were analyzed by TEM and SEM. The contact fatigue and other mechanical properties of Crl2MoV steel were discussed from the microstructure point of view. The results show that: (1) The shape, size and distribution of carbides are the most important factors affecting the contact fatigue strength of Crl2MoV steel; (2) The strength, ductility, toughness and contact fatigue strength of steel are all improved when the technological process is adjusted ; (3) residual austenite in steel will change into martensite under the action of contact fatigue stress, and the transformation of some retained austenite is beneficial to improve the contact fatigue strength.