为提高Q345等低碳结构钢表面的耐腐蚀和耐磨性能,在Q345钢板表面熔覆316+5%WC铁基陶瓷合金粉末,研究不同熔覆功率和光斑扫描速度对熔覆层宏观质量的影响;在其它熔覆工艺参数不变的情况下,分析了激光功率为2000~3500 W时,熔覆层的组织及硬度的变化规律,进而得出在Q345表面熔覆预置厚1.5 mm铁基陶瓷合金粉末的最佳工艺参数为功率3000 W、扫描速度300 mm/min。 In order to improve the corrosion resistance and wear resistance of Q345 and other low-carbon structural steel surfaces, 316 + 5% WC iron-based ceramic alloy powders were clad on the surface of Q345 steel to study the effects of different cladding powers and spot scanning speeds on the macro-quality The influence of other cladding parameters on the microstructure and hardness of the cladding was analyzed when the laser power was between 2000 and 3500 W. The results showed that the thickness of 1.5 mm The optimal process parameters of the base ceramic alloy powder are power 3000 W and scanning speed 300 mm / min.