用机器人光纤激光系统,在45#钢表面作Fe316L铁基粉末激光单道和多道的同轴同步送粉熔覆,以提高材料表面的硬度及耐磨性能。用金相显微镜对熔覆层剖面分析测量,用维式硬度计对基材和熔覆层显微硬度测量结果表明:用光纤激光同轴同步的复合送粉嘴做单道激光熔覆时,选700~950 W的激光功率及60%的搭接率,能获得合适的稀释率(35%~55%)和熔覆层厚度(1.25~1.70mm);有效的消除了搭接处微裂纹和气孔等组织缺陷;试样熔覆层显微硬度显著高于基材硬度,达二倍以上。 Using robotic fiber laser system, Fe316L iron-based powder laser single and multi-pass co-axial powder cladding is applied on 45 # steel surface to improve the hardness and wear resistance of the material surface. The metallographic microscope was used to analyze and measure the cladding layer profile. The results of measuring the microhardness of the substrate and the cladding layer with a Vickers hardness tester showed that when using single-pass laser cladding with a fiber-optic laser coaxial synchronizer, Select the laser power of 700 ~ 950 W and 60% overlap rate, to obtain the appropriate dilution rate (35% ~ 55%) and the cladding thickness (1.25 ~ 1.70mm); effectively eliminate the overlap microcracks And stomatal defects such as microstructure; microhardness of the cladding layer was significantly higher than the substrate hardness, more than twice.