Numerical analysis of weld pool geometry in pulsed current plasma arc welding  

作　　者：孙俊华 武传松 

机构地区：[1]Sun Junhua and Wu Chuansong, Key Lab for Liquid-Solid Structure Evolution and Materials Processing （Ministry of Education）, and Institute for Materials Joining, Shandong University, Jinan, 250061.

出　　处：《China Welding》2010年第3期6-10,共5页中国焊接（英文版）

基　　金：The authors are grateful to the financial support for this research from the National Natural Science Foundation of China （ Key Pro- gram Grant No. 50936003 ）.

摘　　要：Numerical analysis of weld pool shape and size is of great significance for selection and optimization of the process parameters in pulsed current plasma arc welding （PAW）. In this paper, a mathematical model and relevant algorithm are developed to determine the temperature profiles and weld pool geometry in pulsed current PAW through employing an adaptive heat source model. The volumetric heat source consists of semi-ellipsoid at upper part and a conic body at lower part along the workpiece thickness direction. The dynamic variation features of weld pool shape during a pulse cycle are numerically simulated. The calculated weld cross-section is consistent with the measure one.Numerical analysis of weld pool shape and size is of great significance for selection and optimization of the process parameters in pulsed current plasma arc welding （PAW）. In this paper, a mathematical model and relevant algorithm are developed to determine the temperature profiles and weld pool geometry in pulsed current PAW through employing an adaptive heat source model. The volumetric heat source consists of semi-ellipsoid at upper part and a conic body at lower part along the workpiece thickness direction. The dynamic variation features of weld pool shape during a pulse cycle are numerically simulated. The calculated weld cross-section is consistent with the measure one.

关 键 词：pulsed current plasma arc welding weld pool 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]