采用化学共沉积的方法在Q235钢表面制备了Ni-P-SiC复合镀层,并研究了SiC颗粒含量对复合镀层表面形貌、沉积速率、显微硬度和磨损性能的影响。研究结果表明,Ni-P-SiC复合镀层表面平整,碳化硅硬质颗粒分布均匀。随着SiC颗粒含量的增加,复合镀层的沉积速率和显微硬度先增大后减小;当SiC含量为6 g/L时,沉积速率最快且磨损量最小。 Ni-P-SiC composite coatings were prepared by chemical co-deposition on the surface of Q235 steel and the effect of SiC particle content on the surface morphology, deposition rate, microhardness and wear resistance of the composite coatings was investigated. The results show that the surface of Ni-P-SiC composite coating is smooth and the hard particles of SiC are distributed uniformly. With the increase of the content of SiC particles, the deposition rate and the microhardness of the composite coating first increase and then decrease. When the SiC content is 6 g / L, the deposition rate and the wear amount are the smallest.