Rolling Contact Fatigue Behaviors of High Carbon Bainitic Bearing Steel

被引：0
|
作者：
Zheng C. [1 ,2 ]
She L. [1 ,2 ]
Wang Y. [1 ,2 ]
Yang Z. [3 ]
Zhang F. [1 ,2 ,3 ]
机构：
[1] State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao
[2] College of Materials Science and Engineering, Yanshan University, Qinhuangdao
[3] National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao
来源：
Zhang, Fucheng (zfc@ysu.edu.cn) | 1600年 / Chinese Mechanical Engineering Society卷 / 53期
关键词：
Bainite; Bearing steel; Carbide; Rolling contact fatigue;
D O I：
10.3901/JME.2017.24.110
中图分类号：
学科分类号：
摘要：
Bainitic bearing steel of GCr15Si1Mo has been selected as the testing material in this paper. The point rolling contact fatigue experiments are carried out under a well lubricated condition with/without oil lubrication condition. The steel with different volume fractions of carbide are tested. The surface morphology and the distribution of carbides in microstructure of the samples before and after rolling contact fatigue test are observed by scanning electron microscopy. The rolling fatigue properties of these specimens are determined by the Weibull plots. The results show that the rolling fatigue property of the specimen with 1.9 vol.% carbide is superior to the specimen of 5.1 vol.% carbide without lubrication condition. However the order of quality of rolling fatigue property under a well oil lubricated condition of the specimen, from best to the worst is: the specimen without carbide, the specimen with 5.1 vol.% carbide and with 1.9 vol.% carbide. The carbide is easy to be the rolling fatigue crack source as it is a hard phase in matrix of the steel. Then the specimen without carbide shows the best rolling fatigue property. The pits are formed on the surface of the sample after the carbides are fallen off, which increase the adhesive force between the lubricating oil and the surface of specimen. This is beneficial to increasing the oil film thickness during the process of test. Therefore, the rolling contact fatigue life of the specimen is improved. © 2017 Journal of Mechanical Engineering.
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页码：110 / 117
页数：7
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