激光-电弧复合焊工艺参数对焊缝形貌的影响

Effect of welding parameters on weld appearance by laser-arc welding

以Q345B碳钢板为试验材料开展激光-MAG电弧复合焊接试验,研究各主要参数(包括激光电弧相对位置、光丝间距、离焦量等)对焊接稳定性和焊缝成形的影响规律,并验证复合焊方法用于单面焊双面成型的可行性。结果表明,当光丝间距相同时,激光在前比电弧在前的焊接熔深大;光丝间距小于2 mm时,电弧稳定,在约2 mm时熔深最大;离焦量为0 mm时,复合电弧最稳定,为-2 mm时熔深最大;当电流达到200 A以上时,电弧对激光有明显屏蔽作用。同时验证了激光电弧复合焊在单面焊双面成型工艺上具有可行性。

A laser-metal active gas welding （MAG） hybrid welding technology is used to weld Q345B carbon steel. The effect of the main parameters （contain laser power, defocusiug amount and distance between laser and MAG arc）on the welding stability and weld formation are took into account. And verify the feasibility of the hybrid welding technology for single-sided welding double-sided molding. Tile resuhs show that when the filament spacing is the same,the laser-MAG is deeper than the MAG-laser in welding depth;when distance between laser and arc is less than 2 ram,the arc is stable, when it＇s 2 mm,the weld penetration is the largest; when defocusing amount is 0 ram,the art＇ is the most stable,when it＇s -2 ram,the weld penetration is the largest;when the current reaches more than 200 A,the arc has a significant effect on the shielding of the laser. In addition to verify the feasibility of laser arc welding in single-sided welding double-sided forming process.