Numerical analysis of temperature profile and weld dimensions in laser+GMAW hybrid welding of alunminum alloy T-joint
By taking into account the feature of T-joint geometric shape, a transient combined volumetric heat source model suitable for laser+gas metal arc welding (GMAW) hybrid welding of alunminum alloy T-joint was established on the basis of the appropriate description of heat input from laser welding and GMAW. The model also considered the influence of hybrid welding gun inclination on the heat flux distribution through coordinate transformation. The weld pool geometries and dimensions were calculated, and were compared with the experimentally determined ones, which were in a fair agreement. The temperaure profiles and the thermal cycles in the transient state were also simulated for different welding conditions, and the effects of laser power and welding speed on them were discussed. It was found that, the growth of laser power led to an increase in the actual throat, but had a minor influence on the leg length and temperaure distrubtion on the workpiece surface. With raising the welding speed, obvisous changes of weld dimensions and temeprarue distribtion took place.
Hybrid welding Aluminum alloy Temperature field T-joint Numerical simulation
Guoxiang XU Chuansong WU Guoliang Qin Xuyou WANG Shangyang LIN
Key Laboratory of Advanced Welding Technology of Jiangsu Province, Jiangsu University of Science and Key Laboratory for Liquid-Solid Structure Evolution and Materials Processing(Ministry of Education), Harbin Welding Institute, China Academy of Machinery Science&Technology, Harbin 150080, China
国际会议
济南
英文
1-15
2012-08-24（万方平台首次上网日期，不代表论文的发表时间）