The aim of this paper is to investigate the effect of laser re-melting on the morphology and mechanical properties of cladding layer under different laser power conditions. In this study, the laser re-melting tests were performed on YCF102 cladding layer with different laser power, and the morphology and microstructure of each cladding layer were researched by optical microscopy. Meanwhile, the microhardness and wear resistance of YCF102 cladding layer after laser re-melting with different laser power were studied. The results show that laser re-melting can not only improve the morphology of cladding layer, but also improve the microhardness and wear resistance of cladding layer. However, the excessive re-melting laser power leads to the increase of the number of defects in the cladding layer and the deterioration of the mircrohardness and wear resistance of cladding layer. When the re-melting laser power is 650 W, the cladding layer not only has a small surface roughness and no defects, but also has good mechanical properties.

本文的目的是研究在不同的激光功率条件下，激光重熔对熔覆层的形貌和力学性能的影响。本研究以不同的激光功率对YCF102熔覆层进行了激光重熔试验，并通过光学显微镜研究了各熔覆层的形貌和微观结构。同时，研究了不同激光功率下激光重熔后YCF102熔覆层的显微硬度和耐磨性。结果表明，激光重熔不仅可以改善熔覆层的形貌，而且可以提高熔覆层的显微硬度和耐磨性。然而，过量的重熔激光功率导致覆层中缺陷数量的增加以及覆层的显微硬度和耐磨性降低。当重熔激光功率为650W时，覆层不仅表面粗糙度小，无缺陷，而且机械性能也良好。