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将2种含碳量相同合金含量不同的高速车轮材料分别与钢轨材料匹配,利用滚动接触摩擦磨损试验机测试了各摩擦副的摩擦系数和磨损率,比较研究了组织、硬度和加工硬化等因素对车轮材料滚动接触磨损性能的影响.结果表明:在传统的高速车轮材料中适当地增加Si、Mn的含量,降低Cr的含量可以提高车轮材料的抗磨损性能;硬度高的车轮材料未必耐磨,组织差异对车轮材料的抗磨损性能影响显著;表面裂纹易萌生于高度变形的先共析铁素体组织;加工硬化引起的硬度增加对材料的抗磨损性能影响不大.
Two kinds of high-speed wheel materials with the same carbon content were matched with the rail materials respectively. The friction coefficient and wear rate of each friction pair were tested by rolling contact friction and wear testing machine. The factors such as microstructure, hardness and work hardening were compared On the wear behavior of the wheel material under rolling contact.The results show that the proper wear resistance of the wheel material can be improved by properly increasing the content of Si and Mn and reducing the content of Cr in the conventional high speed wheel material , The difference of organization has a significant effect on the anti-wear performance of wheel materials; the surface cracks are easy to occur in the highly deformable pro-eutectoid ferrite; the increase of hardness caused by work-hardening has little effect on the antiwear property of the material.