【摘要】 在含有碳化硅微粒的化学沉积镍磷合金液中,可以获得镍-磷-碳化硅复合镀层。本文采用光镜、电镜、显微硬度和磨损试验等方法,研究了镍-磷-碳化硅复合镀层的组织和耐磨性的关系。试验结果表明,由于共沉积碳化硅微粒在镀层中均匀弥散地分布,在镀态和热处理状态下,复合镀层的耐磨性比化学沉积镍磷合金层和硬铬镀层的耐磨性更优越。热处理能提高复合镀层的硬度和耐磨性,在400℃热处理一小时后,复合镀层具有最高的硬度和耐磨性。本文还对复合镀层的磨损机理作了初步的探讨。更多还原

【Abstract】 Ni-P-SiC composite coatings can be obtained from an electroless nickel plating bath containing SiC particles. The relationship between the structure and wear resistance of Ni-P-SiC composite coatings has been investigated by means of optical microscope, electron microscope, microhardness and wear tests, etc. The results have shown that the wear resistance of the Ni-P-SiC composite coatings irrespctive of whether they are in the as-plated or heat-treated states, is higher than that of the electroless deposited Ni-P coatings and chromium plating ones because the SiC particles are uniformly distibuted in the Ni-P matrix. The hardness and wear resistance of composite coatings can be remarkedly increased by heat treatment, and the Ni-P-SiC composite coating kept at 400℃ for 1 hour has the highest hardnesss and wear resistance, the wear mehanism of composite coatings has also been discussed tentatively.更多还原