NUMERICAL STUDY FOR GTA WELD SHAPE VARIATION BY COUPLING WELDING ARC AND WELD POOL

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	NUMERICAL STUDY FOR GTA WELD SHAPE VARIATION BY COUPLING WELDING ARC AND WELD POOL
	W. C. Dong; S. P. Lu; D. Z. Li; Y. Y. Li
	2009
发表期刊	International Journal of Modern Physics B
ISSN	0217-9792
卷号	23 期号:6-7 页码:1597-1602
摘要	A numerical modeling of the welding arc and weld pool is studied for moving GTA welding to investigate the effect of the surface active element oxygen and the plasma drag force on the weld shape. Based on the 2D axisymmetric numerical modeling of the argon arc, the heat flux, current density and plasma drag force are obtained under different welding currents. Numerical calculations to the weld pool development are carried out for moving GTA welding on SUS304 stainless steel with different oxygen contents 30 ppm and 220 ppm, respectively. The results show that the plasma drag force is another dominating driving force affecting the liquid pool flow pattern, except for the Marangoni force. The different welding currents will change the temperature distribution and plasma drag force on the pool surface, and affect the strength of Marangoni convection and the weld shape. The weld D/W ratio initially increases, followed by a constant value around 0.5 with the increasing welding current under high oxygen content. The weld D/W ratio under the low oxygen content slightly decreases with the increasing welding current. The predicted weld shape by simulation agrees well with experimental results.
部门归属	[dong, wenchao; lu, shanping; li, dianzhong; li, yiyi] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;dong, wc (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;shplu@imr.ac.cn
关键词	Numerical Study Weld Shape Plasma Drag Force Marangoni Force Welding Current Shielding Gas Simulation Oxygen
URL	查看原文
WOS记录号	WOS:000266134700135
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31872
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. C. Dong,S. P. Lu,D. Z. Li,et al. NUMERICAL STUDY FOR GTA WELD SHAPE VARIATION BY COUPLING WELDING ARC AND WELD POOL[J]. International Journal of Modern Physics B,2009,23(6-7):1597-1602.
APA	W. C. Dong,S. P. Lu,D. Z. Li,&Y. Y. Li.(2009).NUMERICAL STUDY FOR GTA WELD SHAPE VARIATION BY COUPLING WELDING ARC AND WELD POOL.International Journal of Modern Physics B,23(6-7),1597-1602.
MLA	W. C. Dong,et al."NUMERICAL STUDY FOR GTA WELD SHAPE VARIATION BY COUPLING WELDING ARC AND WELD POOL".International Journal of Modern Physics B 23.6-7(2009):1597-1602.