穆永哲,贺甜甜,邵若男,郑晓猛,崔通,杜三明,张永振

• 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

摘要(Abstract)：

采用高温箱式电阻炉对退火态GCr15轴承钢进行了淬火和低温回火处理,采用光学显微镜、X射线衍射仪和洛氏硬度计对其经不同淬火保温时间处理后的显微组织、残留奥氏体含量和硬度进行了分析,并利用UMT-2摩擦磨损试验机在干摩擦条件下对GCr15钢进行滑动摩擦磨损试验,采用扫描电镜、能谱仪、三维形貌仪对其磨损率和磨损机制进行分析,研究淬火保温时间对GCr15轴承钢显微组织、力学性能和摩擦磨损性能的影响。结果表明:GCr15轴承钢经淬火和回火处理后的组织由回火马氏体、残留奥氏体和碳化物组成。随着淬火保温时间的延长,GCr15轴承钢的残留奥氏体含量和硬度均呈现先增加后减小的趋势,而碳化物平均尺寸先减小后增加,保温时间为60 min时,碳化物的数量急剧减少;淬火保温时间对GCr15轴承钢摩擦系数影响不大,保温40 min时磨损率最小,20 min时磨损最严重。磨痕表面粘着磨损与氧化磨损共存,保温40 min时,磨痕表面剥落坑相对较小,剥落最轻微。

关键词(KeyWords)： GCr15钢;淬火时间;摩擦系数;磨损率;磨损机制

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2018YFB2000302);; 国家自然科学基金(51905153)

作者(Author): 穆永哲,贺甜甜,邵若男,郑晓猛,崔通,杜三明,张永振

DOI: 10.13289/j.issn.1009-6264.2021-0253

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