应用激光, 2014, 34 (1): 21, 网络出版: 2014-04-09
机器人光纤激光45#钢面铁基粉末熔覆工艺研究
Research on Cladding Process of Fe316L Iron-Based Powder Over 45 # Steel Surface by Robotic Fiber Laser
光纤激光 激光熔覆 同轴同步送粉 复合送粉嘴 稀释率 搭接率 fiber laser laser cladding synchronous and coaxial powder feeding composite powder feed nozzle dilution rate overlapping ratio
摘要
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(1.25~1.70 mm); 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。
Abstract
The single-or multiple-trace synchronous coaxial powder feeding cladding of Fe316L iron-based powder over 45 steel surface is performed by robotic fiber laser in order to improve the hardness and wear resistance The cladding layer profiles are measured and analysted with a metallografic instrument, the micro-hardness of the cladding layer and substrate measured by a Vickers hardness instrument .The results showed that perfect cladding layer thickness with appropriate r dilution rate is able to be gotten in operation of single trace laser scan, if using fiber laser synchronous coaxial powder feeding nozzle, and selecting 700~950 W of laser power and 60% of overlapping ratio.The micro-cracks, holes and other organization defects in overlapping position can be effectively eliminated ,and the micro-hardness of cladding layer on the specimens is significantly higher than the substrates, reaching more than twice.
徐宇蓝, 陈孝山, 刘源, 王树林, 罗敬文. 机器人光纤激光45#钢面铁基粉末熔覆工艺研究[J]. 应用激光, 2014, 34(1): 21. Xu Yulan, Chen Xiaoshan, Liu Yuan, Wang Shulin, Luo Jingwen. Research on Cladding Process of Fe316L Iron-Based Powder Over 45 # Steel Surface by Robotic Fiber Laser[J]. APPLIED LASER, 2014, 34(1): 21.