CL65车轮钢滚动疲劳磨损研究  

Research on Rolling Fatigue Wear of CL65 Wheel Steel

作　　者：李唯一 刘鹏涛[1] 吴斯 任瑞铭[1] LI Weiyi;LIU Pengtao;WU Si;REN Ruiming(School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China;Institute of Metal and Chemistry,China Academy of Railway Sciences,Beijing 100081,China)

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028 [2]中国铁道科学研究院集团有限公司金属及化学研究所,北京100081

出　　处：《大连交通大学学报》2024年第2期89-95,共7页Journal of Dalian Jiaotong University

基　　金：中国国家铁路集团有限公司科技研究开发计划项目(N2022J026)。

摘　　要：利用双盘滚动磨损实验机对CL65车轮钢与U75V钢轨钢进行滚动磨损实验,研究CL65车轮钢表面出现的疲劳磨损现象。实验表明:CL65车轮钢的磨损情况由黏着磨损不断向疲劳磨损过渡。机加工表面细晶层主要出现在磨损的初始阶段,疲劳磨损裂纹的形成和扩展出现在细晶层内或细晶层与基体的界面,导致了细晶层的早期疲劳剥离。随着磨损周次的不断增加,原始片状珠光体和先共析铁素体,基体区域表层的塑性变形不断加剧,当塑性应变过大时,疲劳裂纹开始萌生,并逐渐开始向先共析铁素体区域、渗碳体与共析铁素体界面扩展。The rolling wear experiments of CL65 wheel steel and U75V rail steel were carried out on a double-disk rolling wear tester to study the fatigue wear phenomenon on the surface of CL65 wheel steel.During the experiment,it is found that the wear condition of CL65 wheel steel is changed from adhesive wear to fatigue wear.The fine grain layer on the machined surface mainly appears in the initial stage of wear,and the formation and propagation of fatigue wear cracks are easy to appear in the fine grain layer or the interface between the fine grain layer and the matrix,which leads to the early fatigue peeling off of the fine grain layer.With the continuous increase of wear cycles,the plastic deformation of the surface layer of the original flake pearlite plus syntectoid ferrite is increased continuously.When the plastic strain is too large,the fatigue crack begins to germinate and gradually began to expand in the region of proeutectoid ferrite and the interface between cementite and eutectoid ferrite.

关 键 词：CL65车轮钢 摩擦磨损 疲劳磨损 滚动接触疲劳 显微组织演化 

分 类 号：TG142.1[一般工业技术—材料科学与工程] U270.33[金属学及工艺—金属材料]