采用化学复合镀工艺,成功地制备出了不同颗粒含量的Ni-P-SiC复合镀层,SiC颗粒均匀分布于镍磷合金基质中.复合镀层的镀态硬度随颗粒的复合量增加成线性上升;经400℃,1h热处理后,复合镀层硬度得到进一步提高,最大硬度为HV501435.磨损试验表明,400℃,1h热处理后,复合镀层磨损率只有相同磷含量镍磷镀层的30％,其耐磨性能比中碳钢提高了近一个数量级.
A series of Ni-P-SiC composite coatings were successfully prepared by electroless plat- ing process. Up to 22vol% SiC particles can be uniformly distributed in Ni-P matrix. It was found that hardness linearly increases with the SiC particles co-deposition in the as-deposited coatings. Heat-treatment can improve the coating properties, i.e. in the conditions 400℃ with 1h treated, Ni-P-SiC coating shows the highest hardness of HV501435. Wear tests show that electroless Ni-P- SiC exhibits good wear resistant property. The wear rate is only 30% of that of Ni-P coating and 10% of mild steel substrate, respectively.
参考文献
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