激光深熔TIG复合焊电弧特性及熔池行为的研究
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摘要
对10 mm的Q345B板进行光纤激光与深熔TIG旁轴复合焊接实验,探究激光与电弧的最佳复合方式,利用高速摄像系统观测电弧形态和熔池行为的变化,并分析激光对电弧和熔池的影响机制。实验结果表明:焊枪垂直,激光倾斜30°的复合方式所得到的焊缝熔深最大。复合焊接利用激光增强熔池金属流动的特性弥补了深熔TIG高速焊接焊缝无法成型的缺陷。
The fiber laser and deep penetration TIG composite welding experiment of 10 mm thick Q345B was carried out. The optimum combination of laser and arc was explored. The changes of arc shape and molten pool behavior were observed by high speed camera system. Furthermore, the mechanism of laser effect on arc and weld pool was analyzed. The results show that the penetration depth of weld is the deepest under the compound method of vertical welding gun and laser slanting of 30°. Composite welding uses laser to enhance metal flow, which can makes up for the defect that deep penetration TIG high speed welding seam can not be formed.
The fiber laser and deep penetration TIG composite welding experiment of 10 mm thick Q345B was carried out. The optimum combination of laser and arc was explored. The changes of arc shape and molten pool behavior were observed by high speed camera system. Furthermore, the mechanism of laser effect on arc and weld pool was analyzed. The results show that the penetration depth of weld is the deepest under the compound method of vertical welding gun and laser slanting of 30°. Composite welding uses laser to enhance metal flow, which can makes up for the defect that deep penetration TIG high speed welding seam can not be formed.
引文
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[2]Jarvis B L,Ahmed N U.Development of keyhole mode gas tungsten arc welding process[J].Science and Technology of Welding and Joining,2000,5(1):1-7.
[3]Lathabai S,Jarvis B L,Barton K J.Comparison of keyhole and conventional gas tungsten arc welds in commercially pure titanium[J].Materials Science&Engineering A,2001,299(1):81-93.
[4]Lathabai S,Jarvis B L,Barton K J.Keyhole gas tungsten arc welding of commercially pure zirconium[J].Science&Technology of Welding&Joining,2008,13(6):573-581.
[5]张俊.激光深熔焊的光致等离子体行为模拟研究[J].热加工工艺,2017,46(21):226-231.
[6]冯悦峤.中厚钢板的深熔TIG焊工艺研究及温度场数值模拟[D].天津:天津大学,2015.
[7]樊文飞,罗震,冯悦峤,等.低合金钢Q345的深熔TIG焊研究[J].上海交通大学学报,2016(s1):102-105.
[8]Bunaziv I,Frostevarg J,Akselsen O M,et al.Process stability during fiber laser-arc hybrid welding of thick steel plates[J].Optics&Lasers in Engineering,2018,102:34-44.