辗轧工序对车轮摩擦磨损和接触疲劳性能的影响  

Effect of Rolling Process on Wheel Friction and Wear and Contact Fatigue Performances

作　　者：宫彦华 赵海[1,2,3] 高伟 刘学华[1,2,3] 姚三成 江波 童乐[3] 钟斌 GONG Yanhua;ZHAO Hai;GAO Wei;LIU Xuehua;YAO Sancheng;JIANG Bo;TONG Le;ZHONG Bin(National-Local Joint Engineering Research Center for Advanced Manufacturing Technology of Key Parts of Rail Transit,Ma'anshan Anhui 243000,China;Anhui Province Key Laboratory of High-performance Rail Transportation New Materials and Safety Control,Ma'anshan Anhui 243000,China;Technology Center,Ma'anshan Iron&Steel Co.,Ltd.,Ma'anshan Anhui 243000,China)

机构地区：[1]轨道交通关键零部件先进制造技术国家地方联合工程研究中心,安徽马鞍山243000 [2]高性能轨道交通新材料及安全控制安徽省重点实验室,安徽马鞍山243000 [3]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000

出　　处：《润滑与密封》2020年第9期142-148,共7页Lubrication Engineering

基　　金：安徽省科技重大专项(201903a05020052).

摘　　要：为研究辗轧工序对车轮使用性能的影响,选择经辗轧工序成形和直接钢水浇筑成形的2种车轮材料,利用GPM-30试验机开展摩擦磨损和接触疲劳性能研究,采用光学显微镜、扫描电子显微镜、ASPEX分析仪、EBSD分析2种车轮材料在不同接触应力状态下摩擦磨损和接触疲劳裂纹萌生扩展行为。结果表明:辗轧工序能够有效地细化车轮材料晶粒,减小珠光体片层间距,从而改善车轮微观组织,减少不均匀塑性变形,抑制裂纹的萌生和扩展,减少磨损量,延长接触疲劳寿命;同时发现夹杂物的形态影响接触疲劳试验亚表面裂纹的萌生。In order to study the effect of rolling process on wheel friction and wear and contact fatigue performances,two kinds of wheel materials formed by rolling process and direct molten steel casting were selected,and their friction and wear and contact fatigue performances were studied by using GPM-30 testing machine.The friction and contact fatigue crack ini⁃tiation and propagation behavior of the wheel materials under different state of contact stress was analyzed by optical micro⁃scope,scanning electron microscope,ASPEX analyzer,and ZEISS Sigma 500 EBSD.The results show that rolling technology can effectively refine the grain size of wheel material,decrease pearlite regiment and pearlite lamellar spacing,improve the microstructure of wheel,reduce the uneven plastic deformation,inhibit the initiation and propagation of cracks,reduce wear and prolong the contact fatigue life of wheel material.It is found that the subsurface crack initiation in contact fatigue test is closely related to the morphology of inclusions.

关 键 词：辗轧工序 摩擦磨损 接触疲劳 裂纹 微观组织 夹杂物 

分 类 号：TH117.1[机械工程—机械设计及理论]