摘要
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。
The friction and wear properties of large-diameter M2 high speed steel with different surface roughness at 200 ℃, 400 ℃ and 600 ℃ were studied by Bruker UMT-3 high temperature friction and wear tester. The wear surface morphology of the steel was observed by scanning electron microscopy(SEM), and the effects of surface roughness on high temperature friction and wear properties of the M2 high speed steel were analyzed. The results show that the friction coefficient of the sample with surface roughness of 0.19 μm decreases at first and then tends to be stable with the increase of temperature;the friction coefficient of the sample with surface roughness of 0.05 μm does not change much with temperature, and the friction coefficient of the two samples at 400 ℃ and 600 ℃ is similar. This is because the abrasive wear, adhesive wear and oxidation wear of the M2 high speed steel take place at 200 ℃. The main wear mechanism of the sample with surface roughness of 0.19 μm is abrasive wear, so the frictional resistance between the friction pairs is relatively higher, resulting in a larger friction coefficient;the main wear mechanism of the sample with surface roughness of 0.05 μm is adhesive wear, and the friction coefficient is small due to friction oxide. Adhesive wear and oxidation wear occur in the two samples at 400 ℃ and 600 ℃, the adhesive wear is dominant at 400 ℃ and the oxidation wear is dominant at 600 ℃, and the friction coefficient is small due to friction oxide. The wear rate of the sample with surface roughness of 0.05 μm is higher than that of the sample with surface roughness of 0.19 μm at 200 ℃, 400 ℃ and 600 ℃, which is due to the large adhesive wear degree of the sample with surface roughness of 0.05 μm.
作者
顾绳初
朱丽慧
段元满
吴晓春
顾炳福
GU Sheng-chu;ZHU Li-hui;DUAN Yuan-man;WU Xiao-chun;GU Bing-fu(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;Jiangsu Fuda Special Steel Co Ltd,Yangzhong 212200,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2020年第2期127-132,共6页
Transactions of Materials and Heat Treatment
基金
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”。
关键词
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
large-diameter M2 high speed steel
surface roughness
high temperature friction and wear
friction coefficient
wear rate
