曲率半径对钢轨滚动接触疲劳性能的影响  

Effect of Curve Radius on Rolling Contact Fatigue Properties of Rails

作　　者：钟雯[1] 王文健[1] 宋纾崎[1] 胡家杰[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,四川成都610031

出　　处：《西南交通大学学报》2009年第2期254-257,共4页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金项目(50675183);国家973计划项目(2007CB714702);高等学校博士学科点专项科研基金资助项目(20060613017)

摘　　要：在JD-1型轮轨模拟试验机上,通过改变冲角,研究了干态工况下曲率半径对PD3和U71Mn钢轨滚动接触疲劳性能的影响.结果表明,随曲率半径减小,钢轨磨损量增大,流变层增厚且不均匀.PD3钢轨有较好的抗磨损性能,但疲劳裂纹损伤严重;U71Mn钢轨有良好的抗疲劳性能.The effect of curve radius on the rolling contact fatigue properties of PD3 and U71Mn rails was investigated on JD-1 wheel/rail simulation facility with different attack angles. The results indicate that with a decrease in curve radius the wear volume of rail roller increases, and the plastic flow layer becomes thicker and uneven. PD3 rail has higher wear resistance, but lower fatigue resistance, than UT1 Mn rail does. U71 Mn rail shows an excellent anti-fatigue property.

关 键 词：钢轨 曲率半径 疲劳裂纹 接触疲劳 磨损 

分 类 号：U211.5[交通运输工程—道路与铁道工程]