激光深熔TIG复合焊接参数对焊缝形貌的影响
|
摘要
以10 mm厚度的Q345B钢板为母材,针对激光深熔TIG复合焊接主要工艺参数对焊缝成形的影响规律开展系列研究,为复合焊接工艺优化提供实验依据。实验结果表明,激光对熔池起到了冲击和搅拌的作用,提高了熔池的流动性,形成了平整的焊缝,同时焊缝的熔宽由电弧电流主导,激光功率对焊接熔宽的影响较小,焊接熔深会随着激光功率的增加而增加;熔深和熔宽随着离焦量的增加(-2～3mm)均为先增大后减小;激光在前的复合模式整体要比电弧在前的复合模式的焊接熔深大。
Taking Q345 B steel plate with a thickness of 10 mm as the base material, a series of studies investigated the influence of main process parameters of laser-DP TIG hybrid welding on the formation of welding seams, so as to provide experimental basis for the optimization of composite welding process. The experimental results showed that the laser acts as a shock and agitation on the molten pool, which improves the fluidity of the molten pool and forms a flat weld, and weld width is dominated by arc current; the laser power has little change to the weld width, and the weld penetration depths increases with the increase of laser power; the welding melt depth as well as the width increase first and then decrease with the increase of defocusing amount(-2～3 mm); the welding penetration is bigger while the laser is in front of the arc.
Taking Q345 B steel plate with a thickness of 10 mm as the base material, a series of studies investigated the influence of main process parameters of laser-DP TIG hybrid welding on the formation of welding seams, so as to provide experimental basis for the optimization of composite welding process. The experimental results showed that the laser acts as a shock and agitation on the molten pool, which improves the fluidity of the molten pool and forms a flat weld, and weld width is dominated by arc current; the laser power has little change to the weld width, and the weld penetration depths increases with the increase of laser power; the welding melt depth as well as the width increase first and then decrease with the increase of defocusing amount(-2～3 mm); the welding penetration is bigger while the laser is in front of the arc.
引文
[1] 唐立.机械设备加工过程中厚板焊接工艺的应用[J].现代制造技术与装备,2016(2):101-102.
[2] 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.
[3] Jarvis B L,Ahmed N U.Development of keyhole mode gas tungsten arc welding process[J].Science & Technology of Welding & Joining,2000,5(1):21-1718.
[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] 张瑞华,栗海霞,李明,等.K-TIG焊接电弧特性的数值分析[J].电焊机,2012,42(12):7-11.
[6] 栗海霞.K-TIG焊接电弧特性的数值分析[D].兰州理工大学,2011.
[7] 刘自刚,瞿怀宇,曹瑞昌,等.DP-TIG焊接方法工艺研究[J].焊接,2017(3):61-65.
[8] 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.
[9] 黄逸飞,罗震,敖三三,等.基于非对称热源的异种钢深熔TIG焊接数值模拟[J].机械工程学报,2018,54(2):41-47.
[10] 吴世凯.激光-电弧相互作用及激光-TIG复合焊接新工艺研究[D].北京:北京工业大学,2010.
[2] 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.
[3] Jarvis B L,Ahmed N U.Development of keyhole mode gas tungsten arc welding process[J].Science & Technology of Welding & Joining,2000,5(1):21-1718.
[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] 张瑞华,栗海霞,李明,等.K-TIG焊接电弧特性的数值分析[J].电焊机,2012,42(12):7-11.
[6] 栗海霞.K-TIG焊接电弧特性的数值分析[D].兰州理工大学,2011.
[7] 刘自刚,瞿怀宇,曹瑞昌,等.DP-TIG焊接方法工艺研究[J].焊接,2017(3):61-65.
[8] 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.
[9] 黄逸飞,罗震,敖三三,等.基于非对称热源的异种钢深熔TIG焊接数值模拟[J].机械工程学报,2018,54(2):41-47.
[10] 吴世凯.激光-电弧相互作用及激光-TIG复合焊接新工艺研究[D].北京:北京工业大学,2010.