| 铝合金激光-多股绞合焊丝MIG复合焊特性分析 |
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| 引用本文： | 徐锴,武鹏博,梁晓梅,陈健,黄瑞生.铝合金激光-多股绞合焊丝MIG复合焊特性分析[J].焊接学报,2021,42(1):16-23. |
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| 作者姓名： | 徐锴 武鹏博 梁晓梅 陈健 黄瑞生 |
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| 作者单位： | 哈尔滨焊接研究院有限公司，哈尔滨，150028 |
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| 基金项目： | 国防科技基础加强计划资助;黑龙江省头雁行动计划-能源装备先进焊接技术创新团队. |
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| 摘 要： | 选用多股绞合焊丝替代传统焊丝，将激光热源与多股绞合焊丝MIG焊热源相匹配. 借助高速摄像系统，提取焊接过程中熔池和匙孔特征量，开展5A06铝合金激光-多股绞合焊丝MIG复合焊工艺特性研究，探讨了不同工艺参数下焊缝成形与熔池行为相关性及焊接气孔规律性研究. 结果表明,主要焊接工艺参数对焊缝成形的影响规律与常规焊丝激光-电弧复合焊相一致，由于激光束的指向性，焊缝熔深受激光能量密度影响较大，因此焊缝熔深与激光功率呈正比，与焊接速度、离焦量的绝对值呈反比，焊接电流与光丝间距的影响不大；焊缝熔宽受电弧参数影响较大，且熔宽与熔池面积变化有一一对应关系，熔池面积变大，熔宽增加；余高与熔敷速度有关，因此焊接电流越大、焊接速度越小，余高越大.此外高能量密度激光热源的加入突出了多股绞合焊丝的自旋转特性的优势，特别是焊接电流在130 ~ 200 A范围内，随着焊接电流的增加，多股绞合焊丝的旋转频率增加，旋转特性带来的拓展焊缝宽度及对焊接气孔的抑制等优势更为明显.
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| 关 键 词： | 多股绞合焊丝 铝合金 复合焊接 气孔 |
| 收稿时间： | 2020-11-20 |
Analysis of characteristics of aluminum alloy laser multi stranded welding wire MIG hybrid welding |
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| XU Kai,WU Pengbo,LIANG Xiaomei,CHEN Jian,HUANG Ruisheng.Analysis of characteristics of aluminum alloy laser multi stranded welding wire MIG hybrid welding[J].Transactions of The China Welding Institution,2021,42(1):16-23. |
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| Authors: | XU Kai WU Pengbo LIANG Xiaomei CHEN Jian HUANG Ruisheng |
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| Affiliation: | Harbin Welding Institute Limited Company, Harbin, 150028, China |
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| Abstract: | The multi-stranded wire was used to replace the traditional wire. With the help of high-speed camera system,the characteristics of weld pool and keyhole in the welding process were extracted, and the process characteristics of 5A06 aluminum alloy laser-multi-stranded wire MIG hybrid welding were studied. The correlation between weld formation and weld pool behavior and the regularity of welding porosity under different process parameters were discussed. The laser heat source is innovatively matched with the MIG welding heat source of multi-stranded wire. The results show that the influence of the main welding parameters on the weld formation is consistent with that of the conventional wire laserarc hybrid welding. Due to the directivity of the laser beam,the weld penetration is greatly affected by the laser energy density. Therefore, the weld penetration is proportional to the laser power, and inversely proportional to the absolute value of the welding speed and defocusing amount. The influence of the welding current and the wire spacing is small. The weld width is greatly affected by the arc parameters, and there is a one-to-one correspondence between the weld width and the change of the weld pool area. The weld pool area increases and the weld width increases. The residual height is related to the deposition rate, so the higher the welding current is, the smaller the welding speed is, and the higher the residual height is. In addition, the addition of high energy density laser heat source highlights the advantages of the self-rotation characteristics of multi-stranded wire. Especially when the welding current is in the range of 130-200 A, with the increase of welding current,the rotation frequency of multi-stranded wire increases, and the advantages of expanding the weld width and inhibiting the welding porosity brought by the rotation characteristics are more obvious. |
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| Keywords: | multi-stranded welding wire aluminum alloy composite welding pores |
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