ISSN   1004-0595

CN  62-1095/O4

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稀土对等离子喷涂镍—碳化钛陶瓷涂层摩擦学性能的影响[J]. 摩擦学学报, 2000, 20(3): 175-178.
引用本文: 稀土对等离子喷涂镍—碳化钛陶瓷涂层摩擦学性能的影响[J]. 摩擦学学报, 2000, 20(3): 175-178.
Study on the Friction and Wear Characteristics of Plasma Sprayed Ni-TiC Coatings with or without Rare Earth Additive[J]. TRIBOLOGY, 2000, 20(3): 175-178.
Citation: Study on the Friction and Wear Characteristics of Plasma Sprayed Ni-TiC Coatings with or without Rare Earth Additive[J]. TRIBOLOGY, 2000, 20(3): 175-178.

稀土对等离子喷涂镍—碳化钛陶瓷涂层摩擦学性能的影响

Study on the Friction and Wear Characteristics of Plasma Sprayed Ni-TiC Coatings with or without Rare Earth Additive

  • 摘要: 用销盘摩擦磨损试验机模拟齿面的相对滑动,经测定摩擦系数和上下试样的磨损体积损失、涂层的金相分析,磨痕形貌及成分的扫描微镜观察及分析,研究硅铁稀土混合物对高能等离子喷涂金属陶瓷涂层摩擦学特性的影响,试验结果表明:添加稀土使涂层致密性提高,摩擦系数有所降低,上下试样的磨损体积损失分别减小33%和74%,摩擦副表面温升降低,表明添加稀土有且于在涂层表面形成连续的氧化膜,从而防止胶合并提高耐磨性。

     

    Abstract: The effect of rare earth ferrosilicon on the friction and wear behaviors of plasma sprayed Ni TiC coating on 12Cr2Ni4A substrate was investigated by means of friction and wear testing, metallographic and scanning electron microscopic observations. The friction and wear testing of the coating sliding against a high speed steel was conducted on a pin on disk tester by simulating the sliding between gear tooth. As the results, the plasma sprayed Ni TiC coatings doped with rare earth ferrosilicon registers lower friction coefficient and is of high compactness as compared with that of coatings without rare earth ferrosilicon. At the same time, the former has considerably higher wear resistance than the latter and records a lower wear volume loss of the counterpart pin as well. It was supposed that a continuous and relatively thinker oxide film was formed on the surface of the coatings containing rare earth ferrosilicon, which helps to keep the frictional pair surfaces off adhesion and contact, subsequently improve the friction reduction behavior and increase the wear resistance of the coatings.

     

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