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| Research of ultra-high cycle fatigue property of 100Cr6 bearing steel |
| YANG Yan-hui, WANG Chen, FANG Hai-dong, HUANG Zhen, BAI Yun, XU Xiao-hong |
| Jiangyin Xingcheng Special Steel Co. , Ltd. , Jiangyin 214400, Jiangsu, China |
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Abstract The high cycle and ultra-high cycle fatigue properties of 100Cr6 bear steel, as well as the failure probability distribution at the traditional fatigue limit, were investigated by means of rotating bending fatigue, SEM+EDS and SEM. And the inclusion composition and size were also summarized. The results showed that the traditional fatigue limit of 100Cr6 bearing steel was 967 MPa, and some samples had fatigue fracture failure after having passed 107 cycles at the stress amplitude of 960 MPa, not having the infinite life. At the stress amplitude of limit fatigue nearby, compared with normal distribution, the fatigue life data was more consistent with two-parameter Weibull distribution. Comparing to the method of metallographic examination and SEM, it was easier to find the larger and rigid inclusions classified as D-type and Ds-type by using the fatigue+EDS method.
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Received: 02 June 2020
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2020, Vol. 30 
