%0 Journal Article
%T NUMERICAL SIMULATION OF KEYHOLE FORMATION DURING PAW+TIG DOUBLE-SIDED ARC WELDING<br>PAW+TIG电弧双面焊接小孔形成过程的数值模拟
%A YMZhang
%A <br>孙俊生
%A 武传松
%A 董博玲
%A Y.M.Zhang
%J 金属学报
%D 2003
%I 
%X The mathematic model of keyhole formation in double-side arc welding is established through considering all influencing dynamic factors, such as plasma arc pressure, gravity and surface tension. With the numerical simulation technology, the dynamic process of keyhole formation is quantitatively analyzed by coupling the keyhole model with the governing equations of heat transfer. According to the numerical analysis results, the keyhole formation may be divided into three stages: from welding start to penetration, from penetration to perforation and from perforation to stable keyhole state. The minimum span in the weldpool may be regarded as the evaluation criterion of keyhole formation. The keyhole formation results from the common actions of heat and forces.
%K PAW+TIG arc
%K double-sided arc welding
%K keyhole formation
%K dynamic process
%K numerical simulation<br>PAW＋TIG电弧
%K 双面焊
%K 小孔形成
%K 动态过程
%K 数值模拟
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=479A4D2AC8FC9246&yid=D43C4A19B2EE3C0A&vid=7C3A4C1EE6A45749&iid=CA4FD0336C81A37A&sid=9C65ADEB5990B252&eid=656F8C8401D91023&journal_id=0412-1961&journal_name=金属学报&referenced_num=7&reference_num=9