CO_2激光-MIG复合焊接工艺对中厚度Al-Mg合金焊缝熔深影响分析

Analysis on Influence of Hybrid CO2 Laser-MIG Welding Technology on Weld Penetration of Medium Thickness Al-Mg Alloy

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。

Using 5052 Al alloy 10 mm thickness plate as investigated subject,the influence of hybrid CO2 laser-MIG welding technology on weld penetration of thickness Al-Mg alloy were studied.The results show that the weld penetration can be improved when adding little Ar gas into He gas,but the weld penetration degreases when adding excess Ar gas.With the increase of weld current,weld penetration first increases and then decreases and then increaseds again.Laser power and welding speed has the opposite effects on the weld penetration;heat source spacing has greater influences on the weld penetration,but has little effects on the weld morphology.