摘要
采用光学显微镜、X射线衍射仪、洛氏硬度计等对淬-回火后GCr15轴承钢的显微组织、残留奥氏体含量和硬度进行分析,并利用UMT-2摩擦磨损试验机在干摩擦条件下对GCr15钢进行了变载滑动摩擦磨损试验,采用扫描电镜、能谱仪、三维形貌仪研究了载荷对GCr15钢的滑动摩擦磨损性能的影响。结果表明:淬-回火后的GCr15轴承钢的显微组织由回火马氏体、残留奥氏体以及碳化物组成,其组织特征呈典型的"黑白区"形貌,残留奥氏体含量约为12.5%,硬度约为62 HRC;GCr15轴承钢的摩擦系数随着载荷的增加而减小,磨痕宽度和磨损率随着载荷的增加而增大,磨损机制主要为粘着磨损与氧化磨损的混合,且随着载荷的增大,粘着与氧化程度加剧。
Microstructure, retained austenite content and hardness of GCr15 bearing steel after quenching and tempering were analyzed by means of optical microscope, X-ray diffractometer and Rockwell hardness tester. The sliding friction and wear test of the GCr15 steel was carried out under dry friction condition by UMT-2 friction and wear tester. The effect of load on sliding friction and wear properties of the GCr15 steel was studied by means of scanning electron microscopy, energy dispersive spectrometer analysis and 3 D pro-filer. The results show that the microstructure of the quenched and tempered GCr15 bearing steel is composed of tempered martensite, retained austenite and carbides, and its microstructure characteristics are typical "black and white" morphology. The retained austenite content is about 12.5% and the hardness is about 62 HRC. The friction coefficient of the GCr15 bearing steel decreases with the increase of load, and the wear mark width and wear rate increase with the increase of load. The wear mechanism of the GCr15 bearing steel is mainly the mixture of adhesive wear and oxidation wear, and the degree of adhesion and oxidation increases with the increase of load.
作者
贺甜甜
邵若男
刘建
杜三明
张永振
邓四二
HE Tian-tian;SHAO Ruo-nan;LIU Jian;DU San-ming;ZHANG Yong-zhen;DENG Si-er(National United Engineering Laboratory for Advanced Bearing Tribology,Henan University of Science and Technology,Luoyang 471023,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2020年第7期105-110,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51905153)
国家重点研发计划(2018YFB2000302)。
关键词
GCR15钢
干摩擦
摩擦系数
磨损率
磨损机制
GCr15 steel
dry friction
friction coefficient
friction wear
wear mechanism
