滑差对重载列车轮轨黏着特性与表层损伤的影响  

Study on the Effect of Slip Rate on the Adhesion Characteristics and Surface Damage of Heavy Haul Train Wheel/Rail Materials

作　　者：李春红 闵林峰[2] 沈明学 熊光耀 Li Chunhong;Min Linfeng;Shen Mingxue;Xiong Guangyao(School of Material Science and Engineering,East China Jiaotong University,Nanchang 330013,China;Department of Mechanical Engineering,Wenzhou Polytechnic,Wenzhou 325035,China;Key Laboratory of Advanced Materials for Vehicles&Laser Additive Manufacturing of Nanchang City,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学材料科学与工程学院,江西南昌330013 [2]温州职业技术学院机械工程系,浙江温州325035 [3]华东交通大学载运工具先进材料与激光增材制造南昌市重点实验室,江西南昌330013

出　　处：《华东交通大学学报》2021年第1期100-105,共6页Journal of East China Jiaotong University

基　　金：国家自然科学基金(52061012);牵引动力国家重点实验室开放课题(TPL1906)。

摘　　要：在自行研制的小型轮轨滚动磨损实验机上,以CL60车轮钢和U71Mn钢轨钢配副为研究对象,通过控制轮轨的转速,研究滑差对重载列车轮轨黏着特性与表层损伤的影响。结果表明:滑差对轮轨黏着特性存在显著影响,在所测试的若干工况下,随滑差增大,轮轨黏着系数增大;滑差影响轮轨的磨损量,随滑差增大,轮轨磨损量增加;轮轨表面硬度随滑差增大提高;不同滑差下轮轨表面磨损机制不同,纯滚动摩擦时轮轨以疲劳损伤为主;随滑差的增加,轮轨表面磨损机制由轻微的疲劳磨损转变为黏着磨损。此外,在相同滑差下,车轮表面损伤程度较钢轨严重。CL60 wheel steel against U71Mn rail steel was chosen as friction pair.The effect of slip rate on adhesion characteristics and surface damage of heavy haul train wheel and rail was studied by using a self-designed wheel-rail rolling contact wear testing machine.The results indicate that the slip rate has a significant influence on the adhesion characteristics of wheel-rail.With the increase of slip rate,the adhesion coefficient of wheel-rail increases;slip rate affects the volume of wheel-rail which increases with the increase of slip;the value of wheel-rail surface hardness will be larger than before when the slip rate increases;the wear mechanisms of wheel-rail gradually changes under the different slip rate.During the rolling friction,the surface wear mechanisms is mainly abrasive wear.The wear mechanisms is changed from slightly abrasive to adhesion wear with the increase of slip rate,and the degree of the wheel sample surface damage is larger than that of the rail sample under the same slip rate.

关 键 词：轮轨材料 重载列车 黏着系数 滑差 磨损 

分 类 号：U270[机械工程—车辆工程]