采用高速摄像系统采集焊接过程中的电弧形态图像,并利用电弧分析仪记录电弧信号,通过试验深入研究单一成分活性剂(TiO_2,B_2O_3,Cr_2O_3)对Nd:YAG激光-熔化极活性气体保护焊(Metal active gas,MAG)电弧复合焊电弧形态和焊缝成形的影响。研究表明,与无活性剂作用下的激光-电弧复合焊相比,活性剂能够降低激光对电弧的吸引作用,并且使电弧收缩更加明显;这些活性剂都能不同程度地增加焊缝熔深和熔宽,其中B_2O_3、Cr_2O_3可使熔深显著增加,而TiO_2增加熔深的效果并不明显,但其熔宽增加显著。与无活性剂的电压波形相比,活性剂作用下的电压稳定性降低,但是电压值有所提高。 A high-speed camera system was used to collect the arc shape images during the welding process. The arc signal was recorded by the arc analyzer. The effect of single component activator (TiO 2, B 2 O 3, Cr 2 O 3) on Nd: YAG laser- Metal active gas (MAG) arc hybrid welding arc shape and weld forming. The results show that compared with the laser-arc hybrid welding, the active agent can reduce the laser attraction to the arc and make the arc shrink more obviously. All of these agents can increase the penetration depth and Melting width, of which B_2O_3, Cr_2O_3 can significantly increase the penetration depth, while the effect of increasing penetration depth of TiO_2 is not obvious, but the melting width increases significantly. Compared with the voltage waveform of the inactive agent, the voltage stability under the action of the active agent is decreased, but the voltage value is increased.