水润滑条件下速度对车轮钢磨损特性的影响  

Effect of Speed on Wear Properties of Wheel Steel under Water Lubrication

作　　者：李自彬[1] 郭俊[1] 宋建华[1] 申鹏[1] 刘启跃[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室摩擦学研究所,四川成都610031

出　　处：《润滑与密封》2009年第12期41-44,共4页Lubrication Engineering

基　　金：国家自然科学基金项目(50875221);国家973计划资助项目(2007CB714702);国家创新研究群体科学基金项目(50821063);四川省应用基础基金项目(2008JY0066)

摘　　要：在JD-1轮轨模拟试验机上,利用赫兹模拟准则研究了水润滑条件下速度对车轮钢滚动磨损性能的影响,利用扫描电子显微镜等分析了车轮钢磨损表面的变化情况。结果表明:随速度的增加,车轮钢试样磨损量呈现减小的趋势,滚动接触表面间润滑状态从边界润滑转变为部分弹流润滑;车轮钢磨损机制主要由微切削、微断裂磨损向轻微塑性变形磨损转变。The effect of speed on roiling wear behavior of wheel steel under water lubrication was investigated using JD-1 wheel/rail simulation facilities with Hertz simulation method. The wear and damage properties of wheel steel were analyzed by means of scanning electronic microscopy. The results indicate that with the increase of speed, the wear volume of wheel steel decreases slightly, and the lubrication mechanism at interface of roiling contact surface would transform from boundary lubrication to partial elasto-hydrodynamic lubrication. The wear behavior of railway-wheel steel presents the characteristics of micro-cutting and micro-rupture at low speed, slight plastic deformation at high speed.

关 键 词：水介质润滑 磨损量 微切削 边界润滑 弹流润滑 

分 类 号：TH117.1[机械工程—机械设计及理论]