%0 Journal Article
%T Numerical Simulation of Current Density Distribution in Keyhole Double-Sided Arc Welding
%A Junsheng SUN
%A Chuansong WU
%A Min ZHANG
%A Houxiao WANG
%A <br>Junsheng SUN
%A Chuansong WU
%A Min ZHANG and Houxiao WANG National Key Laboratory of Advanced Welding Production Technology
%A Harbin Institute of Technology
%A Harbin
%A China Key Lab. of Liquid Structure and Heredity of Material
%A Minisity of Education
%A Shandong University
%A Jinan
%A China
%J 材料科学技术学报
%D 2004
%I 
%X In the double-sided arc welding system (DSAW) composing of PAW TIG arcs, the PAW arc is guided by the TIG arc so that the current mostly flows through the direction of the workpiece thickness and the penetration is greatly improved. To analyze the current density distribution in DSAW is beneficial to understanding of this process.Considering all kinds of dynamic factors acting on the weldpool, this paper discusses firstly the surface deformation of the weldpool and the keyhole formation in PAW TIG DSAW process on the basis of the magnetohydrodynamic theory and variation principles. Hence, a model of the current density distribution is developed. Through numerical simulation, the current density distribution in PAW TIG DSAW process is quantitatively analyzed. It shows that the minimal radius of keyhole formed in PAW TIG DSAW process is 0.5 mm and 89.5 percent of current flows through the keyhole.
%K PAW TIG double-sided arc welding
%K Surface deformation of the weldpool
%K Keyhole
%K Current density distribution<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=9BA326ED81A5BD95&yid=D0E58B75BFD8E51C&vid=A04140E723CB732E&iid=0B39A22176CE99FB&sid=CA5852BD1A173B3A&eid=FA89360EB995A8AD&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=2&reference_num=10