摘要
采用Bruker UMT-3型高温摩擦磨损试验机,对M2高速钢在200、400和600℃下的高温摩擦磨损性能进行研究。采用扫描电镜观察磨损表面形貌,探讨了其磨损机制。结果表明:温度是影响M2高速钢高温摩擦磨损性能的重要因素。随着温度的升高,磨损体积先升高后降低,400℃时磨损体积最大,分别是200和600℃的15倍和1.2倍。200℃时摩擦因数最大为0.65,随温度升高摩擦因数先降低,随后趋于平稳,400和600℃时分别为0.39和0.40。200℃时M2高速钢的磨损机制为磨粒磨损、粘着磨损和氧化磨损,以磨粒磨损为主,碳化物减磨作用明显;400和600℃时主要磨损机制为粘着磨损和轻微的氧化磨损。400℃时粘着磨损严重,磨损加剧。600℃时以氧化磨损为主,氧化层起到良好的减磨作用,磨损减弱。400和600℃下的摩擦因数较200℃小,这是表面的软化熔融和氧化层的润滑的共同作用所致。
High temperature friction and wear properties of M2 high speed steel at 200℃,400℃and 600℃were studied by a Bruker UMT-3 wear tester.The wear mechanism was analyzed by observing the wear morphology with SEM.The results showed that the testing temperature was an important factor affecting the high temperature friction and wear performance of M2 high speed steel.With the increase of temperature,the wear volume first increased and then decreased.At 400°C,the wear volume was the largest,being 15 times and 1.2 times that of 200°C and 600°C,respectively.The maximum friction coefficient was 0.65 at 200℃,with the increase of temperature,the friction coefficient first decreased,then tended to be stable,being 0.39 and 0.40 at 400℃and 600℃respectively.The wear mechanism of M2 high speed steel at 200℃included abrasive wear,adhesion wear and slight oxidation wear,abrasive wear was dominant and the carbides helped to reduce wear.The main wear mechanism at 400℃and 600℃was adhesive wear and oxidation wear.The wear was aggravated because of the serious adhesive wear at 400℃.The oxidation wear was dominant,the oxide layer played a good role in reducing wear,and the wear was weakened at 600℃.The friction coefficient at 400℃and 600℃was lower than that at 200℃,which was ascribed to the combined action of softening and melting of the surface and lubrication of the oxide layer.
作者
顾绳初
朱丽慧
段元满
吴晓春
顾炳福
GU Shengchu;ZHU Lihui;DUAN Yuanman;WU Xiaochun;GU Bingfu(School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;Jiangsu Fuda Special Steel Co., Ltd., Yangzhong Jiangsu 212200, China)
出处
《上海金属》
CAS
北大核心
2020年第4期50-55,共6页
Shanghai Metals
基金
国家重点研发计划(No.2016YFB0300403)
2017年镇江“金山英才”计划
2018年“江苏省高层次创新创业人才引进计划”。
关键词
M2高速钢
高温磨损
摩擦因数
磨损体积
磨损机制
M2 high speed steel
high temperature wear
friction coefficient
wear volume
wear mechanism
作者简介
顾绳初,主要从事高速钢组织与性能研究,E-mail:18321597893@163.com;通讯作者:朱丽慧,女,教授,博导,电话:13564632476,E-mail:lhzhu@mail.shu.edu.cn。
