Material analysis of the fatigue mechanism of rollers in tapered roller bearings

被引：4
|
作者：
Guo Wei [1 ]
Cao HongRui [1 ]
Zi YanYang [1 ]
He ZhengJia [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Shaanxi, Peoples R China
来源：
SCIENCE CHINA-TECHNOLOGICAL SCIENCES | 2018年 / 61卷 / 07期
基金：
中国国家自然科学基金;
关键词：
rolling contact fatigue mechanism; crack propagation; material microstructure; roller misalignment; ROLLING-CONTACT FATIGUE; DEGRADATION ASSESSMENT; CRACK INITIATION; BEHAVIOR; MICROSTRUCTURE; DAMAGE; WEAR; PROPAGATION; CLOSURE; GROWTH;
D O I：
10.1007/s11431-017-9249-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Rolling contact fatigue is the main failure mechanism of tapered roller bearings. This study investigated the fatigue mechanism of rollers in a tapered roller bearing that failed in a run-to-failure test. Roller microstructure and crack morphology were investigated through scanning electron microscopy. A microhardness test was performed to investigate the strain hardening of the roller material induced by rolling contact fatigue. Results showed that microcavities and holes are important influential factors of crack initiation and propagation. Crack propagation angle affects crack morphology and propagation mode. Material strain hardening accelerates crack growth. Furthermore, roller misalignment causes uneven hardenability and severe damage to roller ends.
引用
收藏
页码：1003 / 1011
页数：9
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