磷含量对镍基合金复合镀层结构和性能的影响

Effect of Phosphorus Content on Performance of Ni-based Alloy Composite Coatings

以高速钢为基体材料,通过化学镀方式镀覆不同磷含量的镍基合金复合镀层。扫描电镜结果显示,合金镀层呈胞状结构,高磷镀层P含量为10.94%,颗粒均匀、晶胞体积较小,低磷镀层P含量为3.15%,颗粒均匀、晶胞体积较大。X射线衍射图谱分析表明,高磷镀层为非晶态结构,低磷镀层为晶体结构。镀层的显微硬度以及耐磨性较基体材料有明显的提高。

Using high-speed steel as basis material, Ni-based alloy composite coatings with different P contents were prepared by electroless plating. The results of SEM showed that the alloy coating was cellular structure. The content of P was 10. 94% in high P coating, the grains were homogeneous and small in volume. The content of P was 3.15% in low P coating, the grains had comparatively large volume. According to the analysis of X-ray diffraction, the high P coating was uncrystalline structure, while the low P coating was crystalline. The mierohardness and wear resistance of the coatings was significantly improved than the basis material.