In order to explore the synergetic effect on the process combination of pulsed laser and pulsed MIG hybrid welding, two kinds of coupling modes were performed by modulating the laser power to synchronize the arc current. The results showed that under the in-phase coupling mode, the addition of a high power laser during the peak period of the arc current increased the formation and separation time of the droplet and resulted in the deviation of droplet from the wire axis. This caused the droplet to be easily hit by the laser beam and reduced the stability of the droplet transfer. Moreover, the enlarged laser-induced plasma led to a significant loss of the laser energy. In contrast, under the anti-phase coupling mode, the application of a low power laser during the period of the highest arc current suppressed the arc length becoming longer and resulted in faster droplet separation, fewer weld spatters and smoother droplet transfer. At the same time, compared with the weld of in-phase laser-MIG hybrid welding, the weld of anti-phase laser-MIG hybrid welding had the advantages of deeper penetration, fewer weld spatters, less porosity and better tensile properties.

为了探索对脉冲激光和脉冲MIG混合焊接工艺组合的协同效应，通过调制激光功率以使电弧电流同步，进行了两种耦合模式。结果表明，在同相耦合模式下，在电弧电流的峰值期间添加高功率激光会增加液滴的形成和分离时间，并导致液滴与线轴的偏离。这导致液滴容易被激光束击中并降低了液滴转移的稳定性。此外，扩大的激光诱导等离子体导致激光能量的显着损失。相反，在反相耦合模式下，在最高电弧电流期间使用低功率激光可以抑制电弧长度变长，从而导致熔滴分离更快，焊缝飞溅更少，熔滴转移更平稳。同时，与同相激光-MIG混合焊接相比，反相激光-MIG混合焊接具有熔深更深，焊缝飞溅少，气孔少，拉伸性能更好的优点。