Preparation and Properties of Electroless Plating Wear- resistant and Antifriction Composite Coatings Ni-P-SiC- WS2

摘要:

在金属表面制备高硬度、耐磨损且摩擦系数低的功能涂层，可以有效减少摩擦功耗、延长机械设备的使用寿命。采用化学复合镀的方法，在不锈钢基质上实现Ni-P-SiC-WS2镀层的镀覆，并对镀层的表面形貌、微观结构、成分、硬度、耐蚀性和摩擦学性能等进行了测试和分析。结果表明：Ni-P-SiC-WS2镀层表面平整致密，SiC和WS2嵌入在涂层中，且均匀分布。由于硬质粒子的弥散强化机制和软质粒子的润滑作用，与同等试验条件下的Ni-P基其它复合镀层Ni-P-SiC和Ni-P-SiC-MoS2相比，Ni-P-SiC-WS2的显微硬度、腐蚀性能、耐磨性及自润滑性能都得到了很大的提高。

Abstract:

The functional coating with high microhardness, high wear resistance and low friction coefficient on metal surface can reduce friction power consumption effectively and prolong the service life of mechanical equipments. In this study, Ni-P-SiC-WS2 composite coating was deposited on the stainless steel substrate by electroless composite plating. The surface morphology, microstructure, the composition, the microhardness, the tribological properties and the corrosion resistance of the coating were tested and analyzed. The results indicate that the surface of Ni-P-SiC-WS2 coating is compact. Extrinsic insoluble SiC and WS2 are entrenched in the coating and dispersed uniformly. Compared with other nickel coatings obtained under the same experiment condition such as Ni-P-SiC and Ni-P-SiC-MoS2, the tribological properties and the corrosion resistance of Ni-P-SiC-WS2 are improved effectively due to hard-particle-dispersion-strengthening and soft-particle-lubrication of SiC and WS2 in the composite coating.