摘要
提出了ＧＭＡＷ熔池表面产生较大变形时的电弧热流分布模式，以此为基础并考虑熔滴过渡过程及焊缝余高，建立了焊接温度场的数值分析模型。通过数值模拟，定量分析了焊接工艺参数—ＧＭＡＷ熔池表面变形—电弧热流分布—熔池形状及其温度场之间的相互影响。焊接工艺试验结果，与高斯热源模型相比，采用本文给出的ＧＭＡＷ电弧热流分布模型的计算结果更符合实际。
A heat flux distribution model of arc which suits for large surface deformation of GMAW weld pool is given in this paper.Based on this model and the consideration of droplet transfer process and the weld reinforcement,a numerical analysis model of welding heat flow field and a calculating program are developed.By numerical simulation,the interactions of welding process parameters,GMAW weld pool surface deformation,arc heat flux distribution,weld pool geometry and temperature profiles are quantitatively analyzed.The experiment results show that compared with the Gaussian model of arc heat flux,the heat flux distribution model of GMAW arc given in this paper accords with practical situation much beffer.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
1998年第4期255-260,共6页
Transactions of The China Welding Institution
基金
国家教委留学回国人员科研基金
