郑晓猛,杜三明,张永振,刘建,贺甜甜

• 1:河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室
• 2:中国科学院兰州化学物理研究所固体润滑国家重点实验室

摘要(Abstract)：

采用扫描电镜,电子背散射衍射、X射线衍射、显微硬度计及三维表面轮廓仪等对磨削加工后的GCr15SiMn轴承钢的显微组织、硬度、残余应力及物相进行了研究。结果表明:磨削后GCr15SiMn轴承钢表面的硬度远高于基体,并且残留奥氏体发生分解,表面呈现压缩残余应力。试样表层组织存在由于塑性变形引起的几何必须位错密度(GND)增加的现象,这是轴承钢表面硬度上升的主要原因。将轴承服役过程以及磨削加工后的组织性能变化进行对比,发现有相似之处。磨削加工引起的表层变化可能是诱发裂纹在表面萌生的原因。

关键词(KeyWords)： GCr15SiM轴承钢;磨削;显微组织;位错

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2018YFB2000300);; 国家自然科学基金(51375146);; 固体润滑国家重点实验室开放课题(LSL-1803)

作者(Author): 郑晓猛,杜三明,张永振,刘建,贺甜甜

DOI: 10.13289/j.issn.1009-6264.2019-0321

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