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

作　　者：徐宇蓝[1] 陈孝山 刘源[1] 王树林[1] 罗敬文 

机构地区：[1]江苏大学,江苏镇江212013 [2]上海团结普瑞玛激光设备有限公司,上海201111

出　　处：《应用激光》2014年第1期21-27,共7页Applied Laser

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700～950W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（1．25～1．70ram）；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。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.

关 键 词：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 

分 类 号：TG156.99[金属学及工艺—热处理]