铝合金MIG焊保护气体对气孔的影响
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摘要
文中采用MIG焊方法对6 mm厚的5083铝合金进行对接焊试验,研究了保护气体对气孔缺陷的影响。研究结果表明:选用φ(Ar)50%+φ(He)50%的混合气体可以有效控制焊缝气孔率;随着保护气体流量的增加,焊缝气孔率先下降后上升,保护气体流量为15 L/min时对焊缝的保护效果最佳,焊缝气孔率最低约为2.1%。
引文
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[7]周啸尘,李桓,宋春光,等.脉冲TOPTIG焊熔滴过渡特性分析[J].焊接学报,2017,38(7):45-48.
[8]Bai Y,Gao H M and Qiu L.Droplet transition for plasma-MIGwelding on aluminium alloys[J].Transactions of Nonferrous Metals Society of China,2010,20(12):2 234-2 239.
[9]Nie F,Dong H,Peng L I,et al.Lap joining of dissimilar aluminum alloys between wrought 6061 and cast A356 with pulse MIGwelding[J].Journal of Mechanical Engineering,2016,52(24):65-67.
[2]何袁,唐新华,朱晨晓.5083铝合金窄间隙MIG焊工艺研究[J].热加工工艺,2017,23(2):62-64.
[3]农琪,谢业东,金长义,等.铝合金焊接技术的研究现状与展望[J].热加工工艺,2013,42(9):160-162.
[4]王雪,梁志敏,蔡得涛,等.5083铝合金等离子-MIG焊接接头组织和力学性能[J].焊接,2017(12):28-31.
[5]李珉,陈玉芳,肖金桐,等.2A12铝合金熔焊过程气孔形成机制分析[J].铸造技术,2014,12(3):574-576.
[6]Ascari A,Fortunato A,Orazi L,et al.The influence of process parameters on porosity formation in hybrid LASER-GMA welding of AA6082 aluminum alloy[J].Optics&Laser Technology,2012,44(5):1 485-1 490.
[7]周啸尘,李桓,宋春光,等.脉冲TOPTIG焊熔滴过渡特性分析[J].焊接学报,2017,38(7):45-48.
[8]Bai Y,Gao H M and Qiu L.Droplet transition for plasma-MIGwelding on aluminium alloys[J].Transactions of Nonferrous Metals Society of China,2010,20(12):2 234-2 239.
[9]Nie F,Dong H,Peng L I,et al.Lap joining of dissimilar aluminum alloys between wrought 6061 and cast A356 with pulse MIGwelding[J].Journal of Mechanical Engineering,2016,52(24):65-67.