In this paper, the effects of laser power, spot diameter, and scanning speed on the performance of laser cladding NiCrBSi alloy coating on 42CrMo steel substrate were studied, and nine orthogonal experiments were designed for experiment. The experimental data of OM morphology, microstructure, microhardness and wear property of coating were analyzed by using the methods of visual analysis and range analysis. The results show that laser power is the main factor affecting the height of the cladding coating. The spot diameter has the largest effect on the width of the cladding coating. The scanning speed has a significant effect on the depth of the molten pool. The laser power has the greatest influence on the microhardness and wear resistance of the cladding coating. As the laser power increases, the microhardness of the cladding coating decreases. The wear forms of the cladding coating are mainly abrasive and adhesive wear.

研究了激光功率，光斑直径和扫描速度对42CrMo钢基体激光熔覆NiCrBSi合金涂层性能的影响，设计了9个正交试验。采用目视分析和范围分析的方法，分析了涂层的形貌，显微组织，显微硬度和磨损性能的实验数据。结果表明，激光功率是影响熔覆层高度的主要因素。光斑直径对覆层的宽度影响最大。扫描速度对熔池深度有重大影响。激光功率对覆层的显微硬度和耐磨性影响最大。随着激光功率的增加，覆层的显微硬度降低。