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电弧熔炼Cuss/Ni3Si复合材料的摩擦磨损性能
Friction and Wear Properties of Arc Melted Cuss/Ni3Si Composite
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- DOI:
- 作者:
- 李 蕊
LI Rui
- 作者单位:
- 新乡职业技术学院 机械制造系，河南 新乡 453006
School of Mechanical Manufacturing, Xinxiang Vocational and Technical College, Xinxiang 453006, China
- 关键词:
- Cuss/Ni3Si；复合材料；电弧熔炼；耐磨性
Cuss/Ni3Si; composite; arc melting; wear resistance
- 摘要:
- 采用电弧熔炼方法制备了 Cuss/Ni3Si 复合材料， 并对其微观结构和抗磨损性能进行了研究。 结果表明，
Cuss/Ni3Si 复合材料组织均匀致密，主要由韧性的 Cuss 和金属硅化物 Ni3Si 及 Ni31Si12 亚稳相组成，具有良好的强韧性配
合。 Ni3Si 与 Ni31Si12 具有高硬度和强共价键，Cuss 具有良好的塑韧性、低摩擦和自润滑特性，因此 Cuss/Ni3Si 复合材料表
现出优异的耐磨性。 与 1Cr18Ni9Ti 不锈钢相比，Cuss/Ni3Si 复合材料具有更低的摩擦系数和磨损率，随摩擦载荷增加，摩
擦系数降低（从 0.38 到 0.22），磨损率升高（3.92×10-6 mm3
/(N·m)到 9.36×10-6 mm3
/(N·m)）；相同条件下，Cuss/Ni3Si 复合材
料磨损率较 1Cr18Ni9Ti 不锈钢低近一个数量级。
Cuss/Ni3Si composites were prepared by arc melting, the microstructure and wear resistance were studied. The results show that the Cuss/Ni3Si composite has a uniform and dense structure, which is mainly composed of the ductile Cuss and metal silicified Ni3Si and Ni31Si12 metastable phase, and has a good combination of strength and toughness. Ni3Si and Ni31Si12 have high hardness and strong covalent bond, Cuss has good plastic toughness, low friction and self-lubrication characteristics, so Cuss/Ni3Si composite material shows excellent wear resistance. Compared with 1Cr18Ni9Ti stainless steel, Cuss/Ni3Si composite has lower friction coefficient and wear rate. With the increase of friction load, the friction coefficient decreases (from 0.38 to 0.22), and the wear rate increases (from 3.92×10-6 mm3 /(N·m) to 9.36×10-6 mm3 /(N·m)). Under the same conditions, the wear rate of Cuss/Ni3Si composite is nearly one order of magnitude lower than that of 1Cr18Ni9Ti stainless steel