纯钛TA2薄板电弧辅助激光焊高速焊接过程的电弧和熔池特征行为研究

纯钛TA2薄板电弧辅助激光焊高速焊接过程的电弧和熔池特征行为研究 Research on arc and molten pool characteristics of arc-assisted laser welding of pure titanium TA2 sheet in high-speed welding process 周洋 ZHOU Yang 1 first-author 孔谅 KONG Liang 1 王敏 WANG Min 1 李芳 LI Xingyu 1 华学明 LI Fang 1 上海交通大学上海市激光制造及材料表面改性重点实验室 上海交通大学上海市激光制造及材料表面改性重点实验室 HUA Xueming HUA Xueming 针对0.5 mm纯钛TA2薄板的电弧辅助激光焊高速焊接,研究了热源间距和热源相对位置对激光电弧耦合、熔池形态的影响,利用高速摄影对电弧形态和熔池形状进行分析,探索不同热源间距和热源相对位置对薄板高速焊接过程稳定性的影响规律。结果表明,两种热源相对位置(Laser Leading,LL和Arc leading,AL)模式下,随着热源间距的减小,TIG电弧面积均会有所增加;在AL状态下,电弧起预热作用,LL状态下,当热源间距减小到6 mm时,激光和TIG电弧共同作用形成共熔池现象;LL状态下的TIG电弧面积标准差更小,LL状态的焊接过程稳定性优于AL状态。 Aiming at high-speed arc-assisted laser welding of 0.5 mm pure titanium TA2 thin plate,the influence of heat source distance and relative position of laser source on laser-arc coupling and molten pool shape was studied. The high-speed photography was used to analyze the arc shape and molten pool shape and explore the effects of different heat source distances and relative positions of heat sources on the stability of high-speed welding of thin plates were investigated. The results show that the TIG arc area will increase with the decrease of the heat source distance in the two modes of laser source relative position（Laser Leading,LL and Arc leading,AL）;in the AL state,the arc plays a role of preheating,in the LL state,when the heat source distance is reduced to 6 mm,the laser and TIG arc work together to form the eutectic pool phenomenon;the standard deviation of the TIG arc area in the LL state is smaller,and the welding process stability in the LL state is better than the AL state. 电弧辅助激光焊 热源间距 热源相对位置 电弧形态 熔池形貌 arc-assisted laser welding different heat source distances relative positions of heat sources arc morphology molten pool morphology TG456.7 国家重点研发计划(2016YFB0301205) 2022-03-08 7 50