顾绳初,朱丽慧,段元满,吴晓春,顾炳福

• 1:上海大学材料科学与工程学院
• 2:江苏省福达特种钢有限公司

摘要(Abstract)：

采用Bruker UMT-3型高温摩擦磨损试验机研究了不同表面粗糙度的大截面M2高速钢分别在200、400和600℃下的摩擦磨损性能。采用扫描电镜观察其磨损形貌,分析了表面粗糙度对大截面M2高速钢高温摩擦磨损性能的影响。结果表明:表面粗糙度为0.19μm的试样的摩擦系数随着温度的升高先降低后趋于平缓;而表面粗糙度为0.05μm的试样的摩擦系数随温度变化不大,且两者400和600℃的摩擦系数相近。这是由于200℃时,M2高速钢发生磨粒磨损、粘着磨损和氧化磨损,表面粗糙度为0.19μm的试样以磨粒磨损为主,摩擦副相对滑动的剪切阻力大导致摩擦系数较大;而表面粗糙度为0.05μm的试样以粘着磨损为主,生成的摩擦氧化物粘附表面使摩擦系数较小。400和600℃时,两组试样均发生粘着磨损和氧化磨损,400℃时以粘着磨损为主,600℃时以氧化磨损为主,摩擦生成的摩擦氧化物导致摩擦系数较小且差别不大。200、400和600℃下,表面粗糙度为0.05μm的试样的磨损率均大于表面粗糙度为0.19μm的试样,这是由于表面粗糙度为0.05μm的试样其粘着磨损程度较大导致磨损率较大。

关键词(KeyWords)： 大截面M2高速钢;高温摩擦磨损;表面粗糙度;摩擦系数;磨损率

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(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资助”

作者(Author): 顾绳初,朱丽慧,段元满,吴晓春,顾炳福

DOI: 10.13289/j.issn.1009-6264.2019-0344

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