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以10mm厚的5052铝合金试板为研究对象,研究了CO2激光-MIG复合焊接工艺对中厚度Al-Mg合金焊缝熔深的影响。结果表明,在He气中加入少量的Ar气有利于提高焊缝熔深,但加入过量的Ar气,反而会降低焊缝熔深;随着电弧电流的增加,焊缝熔深先增加再减小而后再增加;激光功率和焊接速度对焊缝熔深具有相反的作用效果;热源间距对焊缝熔深具有较大影响,但对焊缝外观形貌影响很小。
The effect of CO2 laser-MIG composite welding process on the weld penetration of medium thickness Al-Mg alloy was studied with a 10mm thick 5052 aluminum alloy test plate. The results show that the addition of a small amount of Ar gas in He gas is beneficial to improve the weld penetration, but the addition of excess Ar gas, on the contrary, will reduce the weld penetration; with the increase of arc current, weld penetration first increases and then decreases Small and then increase; laser power and welding speed have opposite effect on weld penetration; heat source spacing has a greater impact on weld penetration, but little effect on the weld appearance morphology.