摘要
本文在对轴承钢接触疲劳剥落过程进行连续追踪观测的基础上,推导了次表面裂纹扩展的估算公式。理论分析和试验结果表明,接触疲劳寿命与次表面裂纹扩展角之间存在着明显的对应关系。并对残余压应力和残余奥氏体可以提高接触疲劳寿命的原因提出了新的解释。
Based on the sequent tracking observation on spalling of GCr15 bearing steel under rolling contact fatigue, an expression for estimating the propagation of subsurface cracks was derived. The rolling contact fatigue life was found to be markedly related the subsurface crack propagation angle. A new explanation of reason why the rolling contact fatigue life can be prolonged by residual compressive stress and retained austenite was advanced.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第5期A377-A381,共5页
Acta Metallurgica Sinica
关键词
轴承钢
表面
裂纹
残余应力
奥氏体
contact fatigue
fatigue life
crack propagating angle
residual stress
retained austenite
