304L不锈钢激光-脉冲MAG复合焊电弧特性及焊缝成形分析

针对SUS304L不锈钢激光-脉冲MAG复合焊接过程激光与脉冲MAG电弧的过程参数匹配及优化控制问题，系统研究了过程参数对电弧特性及焊缝成形尺寸的影响，获得了复合焊接过程的电弧特性及成形控制策略.结果表明，激光的介入会使复合焊接过程稳定性加强，当脉冲MAG电弧处在电流基值时，较大的激光功率会吸引MAG电弧而造成基值电压的波动，并且大功率激光会对脉冲MAG电弧具备一定的压缩作用，但在峰值阶段影响幅度较小.焊缝形貌的几何尺寸与过程参数的耦合效应有着直接的关系，过程参数的匹配优化能够有效控制焊缝成形尺寸.

Arc characteristics and weld formation during laser-pulsed MAG hybrid arc welding of 304L stainless steel

The influence of process parameters on arc characteristics and weld formation was investigated during laser-pulsed MAG hybrid arc welding of SUS304L stainless steel, and the control strategy of arc characteristics and weld forming was obtained. The results show that the stability of hybrid welding process was enhanced by introducing laser beam. But a high-power laser beam made the base value of arc voltage fluctuate when the current of pulsed MAG arc was at the base value. And the high-power laser beam had compression effect on the pulsed MAG arc, but this effect was weakened at peak value of MAG current. The coupling effect of process parameters and weld geometry had direct impact on the weld size which could be controlled by optimizing the process parameters.