摘要
针对高速列车侧墙A6N01S铝合金型材非熔透型焊接接头气孔倾向严重的问题,以5A06铝合金为试验对象,系统研究了摆动方式、摆动频率、摆动幅度等激光摆动参数对铝合金激光-MIG复合填丝焊焊缝气孔率的影响规律,并通过激光摆动工艺有效地解决了高速列车侧墙铝合金型材的焊缝气孔问题。结果表明,试验条件下,与激光束不摆动相比,采用光束圆形摆动,垂直于焊缝摆动和"∞"形摆动均可以有效抑制焊缝气孔,其中,垂直于焊缝摆动抑制气孔效果最佳,"∞"形摆动抑制气孔效果最差;不同的摆动方式存在不同的最优摆动频率区间,圆形摆动的最优频率区间最宽,"∞"形摆动的最优频率区间最窄;激光摆动后,高速列车侧墙铝合金型材3 mm侧焊缝的气孔完全被抑制,4 mm侧焊缝气孔率约为0.55%,约下降63.2%。
In order to solve the serious porosity problem of non-penetration welding joint of A6 N01 S aluminum alloy profile on the side wall of high-speed train, the influence of wobbling mode, wobbling frequency and amplitude on the weld porosity of 5 A06 aluminum alloy by laser-MIG hybrid welding with filler wire were studied. It was found that with the experimental parameters the weld porosity could be effectively inhibited by using laser wobbling with circle trajectory, linear trajectory(perpendicular to weld bead) or "∞" trajectory, furtherly the inhibition effect of linear trajectory was the best, while "∞" trajectory was the worst. When wobbling mode was circle trajectory, it had the widest optimal frequency range, and "∞" trajectory had the narrowest optimal frequency. For the aluminum alloy profile on the side wall of high-speed train, the weld porosity of 3 mm thickness joint was completely inhibited, while the weld porosity rate of 4 mm thickness was 0.55%, which decreased by 63.2%, compared to conventional laser-MIG hybrid welding with filler wire process.
作者
常云峰
雷振
张冠星
薛行雁
秦建
董宏伟
韩晓辉
Chang Yunfeng;Lei Zhen;Zhang Guanxing;Xue Hangyan;Qin Jian;Dong Hongwei;Han Xiaohui(State Key Laboratory of Advanced Brazing Filler Metals and Technology,Zheng Zhou Research Institute of Mechanical Engineering CO.,LTD.,Zhengzhou,Henan 450001,China;Harbin Welding Institute CO.,LTD.,Harbin,Heilongjiang 150028,China;CRRC Qindao Sifang CO.,LTD.,Qingdao,Shandong 266111,China)
出处
《应用激光》
CSCD
北大核心
2020年第3期459-464,共6页
Applied Laser
基金
国家重点研发计划(战略性国际科技创新合作重点专项)(项目编号:2016YFE0201300)
郑州市重大科技创新专项(项目编号:88PCXZX784)。
关键词
铝合金
复合填丝焊
激光摆动
气孔率
aluminum alloy
laser wobble
hybrid welding with filler wire
porosity
