The numerical analysis of thermal effect and weld shaping of DE-GMAW under composite heat source  

作　　者：Huang Jiankang Du Wenyu Shi Yu Han Rihong Fan Ding 黄健康;杜文玉;石玗;韩日宏;樊丁(State Key Laboratory of Gansu Advanced Nonferrous Metal Materials,Lanzhou University of Technology,Lanzhou 730050)

机构地区：State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou 73005

出　　处：《China Welding》2016年第2期6-13,共8页中国焊接（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51165023)

摘　　要：The action of the composite heat source model in DE-GMAW has been carried out according to the characteristics of the DE-GMA W process, and the distribution of surface and body heat source was analyzed. The weld temperature field distribution has been derived from the appropriate boundary conditions and the thermal physical property parameters by COMSOL software. The effects of the positions of the surface and body heat source on the cross- sectional shape were investigated by studying the experimental welding thermal cycle curve. The simulated results are fully compliant with the experimental data under the same conditions. This illustrates that the composite heat source model is correct. It reflects the thermal mechanism of DE-GMA W process, and reveals the internal influence of weld shaping.The action of the composite heat source model in DE-GMAW has been carried out according to the characteristics of the DE-GMA W process, and the distribution of surface and body heat source was analyzed. The weld temperature field distribution has been derived from the appropriate boundary conditions and the thermal physical property parameters by COMSOL software. The effects of the positions of the surface and body heat source on the cross- sectional shape were investigated by studying the experimental welding thermal cycle curve. The simulated results are fully compliant with the experimental data under the same conditions. This illustrates that the composite heat source model is correct. It reflects the thermal mechanism of DE-GMA W process, and reveals the internal influence of weld shaping.

关 键 词：double electrode-gas metal arc welding composite heat source weld shaping numerical analysis 

分 类 号：TG444.7[金属学及工艺—焊接]