Effect of Hardness, Surface Finish, and Grain Size on Rolling-Contact Fatigue Life of M-50 Bearing Steel
- 1 June 1960
- journal article
- Published by ASME International in Journal of Basic Engineering
- Vol. 82 (2) , 287-294
- https://doi.org/10.1115/1.3662574
Abstract
The effect of hardness, surface finish, and grain size upon the compressive rolling-contact fatigue strength of M-50 bearing steel has been studied. Considerable testing on the RC Rig and statistical-treatment methods have been included. A mathematical expression relating these variables to life expectancy is presented and the optimization of these variables is discussed. It is shown that bearing fatigue of M-50 increases by increasing hardness, decreasing surface, and increasing grain size. The optimum life identified occurs at Rc64 hardness, 1.5 rms surface finish, and a grain size of ASTM 2.Keywords
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