激光熔覆技术在高速转子轴修复中的应用研究  

Application Research of Laser Cladding Technology in High Speed Rotor Shaft Repair

作　　者：刘钊鹏 顾俊 王健超[1,2] Liu Zhaopeng;Gu Jun;Wang Jianchao(Shanghai Institute of Laser Technology,Shanghai 20023,China;Shanghai Engineering Research Center of Laser Intelligent Manufacturing,Shanghai 200223,China)

机构地区：[1]上海市激光技术研究所,上海200233 [2]上海激光智能制造工程技术研究中心,上海200233

出　　处：《应用激光》2019年第5期750-755,共6页Applied Laser

摘　　要：本文以激光熔覆后机加工的方式修复空压机高速转子轴。熔覆过程中采取了一系列抑制基材升温的措施。控制扫描速度、送粉速度和保护气流量不变,在不同激光功率和熔覆搭接率的条件下,开展了多组单道和多道搭接熔覆实验并进行检测。结果显示激光功率600 W,搭接率27.5%时熔覆效果最优,熔覆层硬度HRC53-56,与基体实现冶金结合;熔覆过程基材温度始终维持100℃以下;修复后经着色渗透探伤,熔覆层无开裂、气孔等缺陷,经动平衡检测及调整,达到装机运行要求。In this paper, the high-speed rotor shaft of the air compressor is repaired by laser cladding and machining. A series of measures to suppress substrate temperature rising are taken during the cladding process. Multiple sets of single-pass and multi-pass lap welding experiments were carried out and tested under the conditions of different laser power and cladding lap ratio, with the scanning speed, powder feeding speed and protecting gas flow rate controlled. The test results show that the cladding effect is optimal with laser power 600 w and lap ratio 27.5%. The hardness of the cladding layer is HRC53-56, which is metallurgical bonding with the substrate. The substrate temperature during the cladding process is always maintained below 100 ℃. The cladding layer which is stained by colored penetrant after the repair hasno defects such as cracks and pores. The installation operation requirements are met after the dynamic balance detection and adjustment.

关 键 词：激光熔覆 转子轴修复 稀释率 温度控制 

分 类 号：TG455[金属学及工艺—焊接]