铝合金电弧预熔丝激光焊工艺特性研究  

Study on Aluminum Alloy Laser Welding with Pre-Melted Liquid Filler by Arc

作　　者：彭进[1,2] 李俐群[2] 张瑞珠[1] 严大考[1] 

机构地区：[1]华北水利水电大学机械学院,河南郑州450045 [2]哈尔滨工业大学先进焊接与连接国家重点实验室,黑龙江哈尔滨150001

出　　处：《激光与光电子学进展》2017年第6期169-175,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(51175115);水利部科技推广计划项目(TG1420);华北水利水电大学高层次人才科研启动基金项目

摘　　要：提出了基于电弧预熔丝的激光焊方法,研究了入射能量对焊丝熔化状态以及焊缝成形的影响,进一步对焊接过程的工艺适应性进行了分析。结果表明,当焊接电流较小时,焊丝能稳定地熔化、填充进熔池中,增大焊接电流有利于增加焊丝前端的熔化长度;增加激光功率对焊丝熔化量无影响。电弧预熔丝激光焊方法可降低焊缝气孔率,对装配间隙具有很好的适应性。The method of laser welding with pre-melted liquid filler by arc is proposed, and the influence of incident energy on the melting state of the filler wire and the weld appearance is studied. The process adaptability of the welding process is further analyzed. The results show that, when the welding current is relatively low, the filler wire can be stably melted and filled into the molten pool, and the increase of the welding current is beneficial to increasing the melting length of the front-end filler wire. The increase of the laser power has no effect on the melting amount of the filler wire. The method of laser welding with pre-melted liquid filler by are can reduce the porosity of weld and significantly improve the adaptability to assembly clearance.

关 键 词：激光技术 激光焊接 电弧预熔丝 铝合金 高速摄像 

分 类 号：TG456.7[金属学及工艺—焊接]