高速轮轨材料匹配的滚动接触磨损性能  

Rolling Contact Wear Properties of Matching of High-speed Wheel/Rail Materials

作　　者：曾东方[1] 鲁连涛[1] 张远彬[1] 张继旺[1] 朱旻昊[1] 金学松[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室成都610031

出　　处：《机械工程学报》2013年第13期183-189,共7页Journal of Mechanical Engineering

基　　金：国家科技支撑计划项目(2009BAG12A01–B10–1);铁道部科技研究开发计划(2009J015);高速铁路基础研究联合基金(U1134202)资助项目

摘　　要：为了研究高速铁路轮轨材料匹配对轮轨摩擦副滚动接触磨损性能的影响,将三种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各摩擦副磨损率,比较研究成分变化对车轮材料力学性能和轮轨摩擦副滚动接触磨损性能的影响。结果表明,在常规的高速车轮材料中增加碳的质量分数能提高材料的强度和抗磨损性能,但材料塑韧性下降;在常规的高速车轮材料中适当地调整合金成分的质量分数能更大幅度地提高材料强度和抗磨损性能,同时保持材料塑韧性基本不变。滚滑条件下,车轮材料应变硬化程度的高低不影响车轮材料的抗磨损性能,试验前车轮材料初始硬度的高低是决定其抗磨损性能的主要因素。钢轨材料的磨损率随对应车轮硬度的增加而增加,且近似呈线性关系。In order to study the influence of matching of high-speed wheel/rail steels on the rolling contact wear properties of frictional pairs of wheel/rail, three high-speed wheel steels which are respectively matched with rail steels and the wear rate of these frictional pairs is measured by using rolling/sliding wear machine. The effects of chemical compositions of wheel steels on their mechanical properties and the roiling contact wear of wheel/rail frictional pairs are investigated. The results show that the strength and wear resistance of a modified wheel steel which increases carbon content based on conventional wheel steel is improved, while the ductility and toughness of which decreases. The strength and wear resistance of another modified wheel steel whose alloy content is appropriately adjusted based on conventional wheel steel is improved more effectively, with almost unchanged ductility and toughness. The wear resistance of wheel steels is not affected by strain hardening under rolling/sliding conditions, while it is dominated by the pre-hardness of wheel steels. The wear rate of rail steel increases linearly with the hardness of the corresponding wheel steel rising.

关 键 词：轮轨材料匹配 碳的质量分数 合金成分质量分数 力学性能 滚动接触磨损 

分 类 号：TH117[机械工程—机械设计及理论]