航空材料学报2017，Vol.37Issue(6)：34-40,7.DOI:10.11868/j.issn.1005-5053.2017.000108
表层超硬化M50NiL钢接触疲劳失效机理
Failure Mechanism of Contact Fatigue of Surface Super-hardened M50NiL Steel
摘要
Abstract
Hardness gradient,residual stress gradient and the organization structure of surface super-hardened M50NiL steel roller and M50 steel roller were studied,the rolling contact fatigue life was measured,and the failure process was analyzed and compared by using surface profiler,Vickers hardness tester,X ray residual stress determinator,optical microscope,scanning electron microscope (SEM),roiling contact fatigue test machine and other equipment.The fatigue failure mechanism of surface super-hardened M50NiL steel was revealed.The results show that the fatigue failure mechanism of surface super-hardened M50Nil steel returns to the Hertz theory and shows typical contact fatigue characteristics.The high surface hardness,residual compressive stress and a good organization structure can completely inhibit the initiation of surface cracks;therefore,the failure mechanism is returned to the Hertz theory.关键词
表层超硬化/M50NiL钢/接触疲劳/失效机理Key words
surface super-hardened/M50NiL steel/contact fatigue/failure mechanism分类
矿业与冶金引用本文复制引用
罗庆洪,赵振业,贺自强,李志明..表层超硬化M50NiL钢接触疲劳失效机理[J].航空材料学报,2017,37(6):34-40,7.基金项目
973项目资助 （）
