郇庆婷,杜三明,王梦丹,贺甜甜,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
• 2:河南科技大学材料科学与工程学院

摘要(Abstract)：

采用预渗氮+淬回火(N+Q)及碳氮共渗+淬回火(C+Q)两种化学热处理对GCr15钢进行表面强化,并与淬回火的GCr15钢进行对比。采用X射线衍射仪、扫描电镜、光学显微镜、显微硬度计等研究了不同热处理后GCr15钢的物相、组织结构及硬度,利用UMT-2摩擦磨损实验机分析了不同热处理后GCr15钢的摩擦学特性。结果表明:预渗氮+淬回火(N+Q)及碳氮共渗+淬回火(C+Q)处理后GCr15钢的显微组织由马氏体、碳/氮化物及残留奥氏体组成,其中,C+Q处理后生成的碳/氮化物组织尺寸更为粗大;经过N+Q及C+Q处理后GCr15钢的表层硬度均高于经淬回火后的硬度,硬化层深度分别为0.25 mm、0.30 mm;摩擦磨损实验表明,C+Q处理可以有效降低GCr15钢的摩擦系数及磨损率,磨损机制主要为磨粒磨损。

关键词(KeyWords)： GCr15钢;淬火;碳氮共渗;磨损性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51905153);; 固体润滑国家重点实验室开放基金(重点基金LSL-1916)

作者(Author): 郇庆婷,杜三明,王梦丹,贺甜甜,张永振

DOI: 10.13289/j.issn.1009-6264.2020-0466

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