Numerical analysis of transient keyhole shape in pulsed current plasma arc welding  

作　　者：孙俊华 武传松 

机构地区：[1]School of Materials Science and Engineering, Shandong Jianzhu University, Jinan, 250101 [2]Provincial Key Lab ofAdvanced Welding Technology, Jiangsu University of Science and Technology, Zhenjiang, 212003. [3]Institute of MaterialsJoining, Shandong University, Jinan, 250061

出　　处：《China Welding》2014年第4期69-75,共7页中国焊接（英文版）

摘　　要：Based on the characteristics of ＂one keyhole in a pulse＂ in pulsed current plasma arc welding （PAW） , the transient variation process of weld pool in a pulse cycle is simulated through the establishment of corresponding heat source model. And considering the effects of gravitational force, plasma arc pressure and surface tension on the weld pool surface, the dynamic change features of the keyhole shape in a pulse cycle are calculated by using surface deformation equation. Experiments are conducted and validate that the calctdated weld fusion line is in good agreement with the experimental results.Based on the characteristics of ＂one keyhole in a pulse＂ in pulsed current plasma arc welding （PAW） , the transient variation process of weld pool in a pulse cycle is simulated through the establishment of corresponding heat source model. And considering the effects of gravitational force, plasma arc pressure and surface tension on the weld pool surface, the dynamic change features of the keyhole shape in a pulse cycle are calculated by using surface deformation equation. Experiments are conducted and validate that the calctdated weld fusion line is in good agreement with the experimental results.

关 键 词：pulsed current plasma arc welding weld pool KEYHOLE numerical analysis 

分 类 号：TG456.2[金属学及工艺—焊接] TG146.21[一般工业技术—材料科学与工程]