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运用M 2型摩擦磨损试验机测定了不同载荷条件下稀土 /MoSi2 复合材料与 45钢配对件的干摩擦磨损性能 ,采用SEM观察了摩擦副表面的形貌和X射线分析了磨屑相组成 ,并探讨了其磨损机制。结果表明 :稀土 /MoSi2 和MoSi2 与 45钢干摩擦时 ,在负荷不超过 15 0N的范围内 ,其摩擦系数 μ和磨损率W与负荷p间较好地满足关系式 :W(或 μ) =a +bp +cp2 +dp3+ep4 ;两种材料均具有优异的耐磨性能 ,在 80～12 0N范围 ,稀土 /MoSi2 复合材料的磨损率比纯MoSi2 材料的至少降低了 65 % ;稀土 /MoSi2 材料的磨损机制主要是粘着磨损
The friction and wear properties of rare earth / MoSi2 composites and 45 steel counterparts under different loading conditions were measured by M 2 friction and wear testing machine. Morphology of surface of the friction pair and X-ray diffraction were analyzed by SEM. And explored its wear mechanism. The results show that the friction coefficient μ and the wear rate W and the load p satisfy the relation of W (or μ) = 0 in the dry friction of rare earth / MoSi2, MoSi2 and 45 steel under the condition that the load does not exceed 15 0N. a + bp + cp2 + dp3 + ep4. Both materials have excellent wear resistance. In the range of 80-1200N, the wear rate of rare earth / MoSi2 composites is reduced by at least 65% compared with that of pure MoSi2. The wear mechanism of the material is mainly adhesive wear