油润滑下La2O3-Mo5Si3／MoSi2复合材料与钢对磨时的摩擦磨损性能

机械工程材料, 2011, 35(9): 72-103.

油润滑下La2O3-Mo5Si3／MoSi2复合材料与钢对磨时的摩擦磨损性能

唐思文 ^1, , 张厚安 ^2, , 颜建辉 ^3, , 蒋玲莉 ^4,

1.湖南科技大学先进矿山装备制造教育部工程研究中心,湘潭411201

2.厦门理工学院材料制备与应用技术研究所,厦门361101

3.湖南科技大学机械设备健康维护省重点实验室,湘潭411201

4.湖南科技大学机械设备健康维护省重点实验室,湘潭411201

基金项目: 湖南省科技计划资助项目(2010GK3144) 国家自然科学基金资助项目(51071133;50405041) 湖南省高校科技创新团队支持计划资助项目

关键词：二硅化钼 , 钢 , 摩擦磨损 , 油润滑 , 稀土

Friction and Wear Properties of La2O3-Mo5Si3/MoSi2 Composites Against Steels under Oil Lubrication

Keywords： molybdenum disilicide , steel , friction and wear , oil lubrication , rare earth

用摩擦磨损试验机测定了油润滑下0．8％La2O3-Mo5Si3／MoSi2复合材料与不同钢材配副时的摩擦磨损性能，采用扫描电镜分析了磨损表面形貌，探讨了其磨损机理。结果表明：油润滑条件下，复合材料与调质45钢、淬火45钢和CrWMn钢配副时，摩擦因数均在0．1以下，磨损率均低于10-3mm3·min-1；与CrWMn钢配副时具有最低的摩擦因数和磨损率；复合材料与调质、淬火45钢对磨时的磨损机理为磨粒磨损，与CrWMn钢对磨时的为磨粒磨损和点蚀。

Friction and wear properties of 0. 8% La2O3-Mo5Si3/MoSi2 composites against different steels were determined by a friction and wear tester under oil lubrication. The worwout surface was observed by using scanning electron microscopy, and the wear mechanism was discussed. The results show that the friction coefficient was below 0.1 when the composite grinding with quenched and tempered 45 steel, quenched steel and CrWMn steel, and the wear rate of composites was below 10-3 mm3 . min-1. The friction coefficient and wear rate when composites grinding with CrWMn steel were the lowest. The wear mechanism of the composites grinding with quenched and tempered 45 steel and quenched steel was abrasive wear, and when grinding with CrWMn steel, the wear mechanism was abrasive wear and spot corrosion.

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