Ni-W-P-SiC-WS_2耐磨减摩复合镀层的制备及性能研究

The preparation and properties study on antiwear and antifriction composite coating Ni-W-P-SiC-WS_2

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。采用化学复合镀方法，在不锈钢基质上实现Ni—WP—SiC—WS2镀层的镀覆，并对镀层的表面形貌、微观结构、成分、硬度、摩擦学性能和耐蚀性等进行了测试和分析，研究结果表明，NiW—P—SiC—WS2镀层表面平整，由胞状物和分布均匀的复合颗粒组威；镀层中P的含量在5％～8％之间，属于中磷镀层。与同等实验条件下的二元合金镀层Ni—P—SiC—WS2镀层相比，由于W的共沉积，三元合金镀层Ni—W—PSiC—WS2的微观硬度、腐蚀性能和耐磨性均有所提高，同时自润滑性能更加优异。

The functional coating owning high microhardness, wear resistance and low friction coefficient on metal surface can reduce friction power consumption and prolong the service life of mechanical equipment. Ni- W-P SiC WS2 composite coatings were deposited on the stainless steel substrate by electroless plating in this pa per. Meanwhile, the surface morphology, microstructure, composition, microhardness, tribological properties and corrosion resistance were tested and analyzed. Results showed that the surface of Ni W-P-SiC WS~ coatings were smooth and composite particles distribute uniformly. The phosphorus content of the coating ranges from 5% to 8% and belongs to medium phosphoric coating. By comparison with Ni-P SiC WS2, the microhardness, corrosion and wear resistance of ternary alloy coating Ni W-P SiC WS2 were greatly improved because of the codeposited tungsten. Moreover, the lubricating properties of the coating were more outstanding.