TRACKING OBSERVATION ON SUBSURFACE CRACKING IN GCr15 BEARING STEEL UNDER ROLLING CONTACT FATIGUE
CHEN Longqing Zhengzhou Institute of Technology; CHEN Qing Luoyang Institute of Technology
Cite this article:
CHEN Longqing Zhengzhou Institute of Technology; CHEN Qing Luoyang Institute of Technology. TRACKING OBSERVATION ON SUBSURFACE CRACKING IN GCr15 BEARING STEEL UNDER ROLLING CONTACT FATIGUE. Acta Metall Sin, 1991, 27(5): 61-65.
Abstract 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.