(Ni-P)-WC纳米微粒复合电镀的研究

Study of (Ni-P)-WC Nanoparticle Composite Electroplating Process

研究了WC纳米微粒质量浓度、阴极电流密度、pH值、温度、搅拌方式等工艺参数对(Ni-P)-WC纳米微粒复合镀层沉积速度的影响,并通过正交试验,确定了复合电镀的最佳工艺参数。对镀层的表面形貌、成分及不同热处理条件下的硬度进行了观察与测定,实验结果表明,镀层表面均匀,有质量分数为2.0%～3.5%的WC纳米微粒的镀层;热处理后硬度可达1240HV。

The influence of electroplating parameters, such as content of WC particle, current density, pH value, temperature and stirring mode, on the rate of deposition of (Ni-P)-WC composite coating were investigated, and the optimum parameters for Ni-P-WC composite plating were determined by orthogonal experiments. The surface morphology, composition and micro-hardness of the composite coating were observed and measured. The results show that the composite coatings have a smooth surface with 2.0%～3.5% WC involved, and have a higher hardness. After heat treatment at 500℃, the hardness of the composite coatings is as high as 1 240 HV.