Numerical simulation of arc properties and their effects on the weld shape

IMR OpenIR

	Numerical simulation of arc properties and their effects on the weld shape
	S. P. Lu; W. C. Dong; D. Z. Li; Y. Y. Li
	2009
发表期刊	Acta Physica Sinica
ISSN	1000-3290
卷号	58 期号:6 页码:S94-S103
摘要	A mathematical model of mutually coupled welding arc and weld pool is established for moving tungsten inert gas welding process on SUS304 stainless steels to investigate the argon and the helium arc properties and their effects on the weld shapes. The comparisons of the temperature contour, the current density and the heat flux on the anode surface between the argon and the helium arcs show that the helium arc is more constricted than the argon arc and transfers more heat fluxes to the anode. The effects of buoyancy, electromagnetic force, Marangoni force and drag individually on the weld pool are simulated, and simulation results show that the Marangoni force on the pool surface is one of the main forces affecting the weld shape, independent of shielding gases. Under argon arc, an other dominant force is the plasma drag force. However, the effect of electromagnetic force is stronger than that of the plasma drag force in helium are. The inward convection induced by the electromagnetic force increases the weld depth, thereby leading the weld depth and the D/W ratio in helium are to be larger than the ones in argon are under the same oxygen content. The weld D/W ratio increases first and then maintains a constant with the increase of oxygen content for both argon arc and helium are. The weld D/W ratio obtained by simulation is in good agreement with experimental results.
部门归属	[lu shan-ping; dong wen-chao; li dian-zhong; li yi-yi] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;lu, sp (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;shplu@imr.ac.cn
关键词	Argon Arc Helium Arc Arc Properties Weld Shape Heat-transfer Electric-arc Shielding Gas Fluid-flow Oxygen Anode Convection Model Tig
URL	查看原文
WOS记录号	WOS:000270312900016
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/321006/32158
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. P. Lu,W. C. Dong,D. Z. Li,et al. Numerical simulation of arc properties and their effects on the weld shape[J]. Acta Physica Sinica,2009,58(6):S94-S103.
APA	S. P. Lu,W. C. Dong,D. Z. Li,&Y. Y. Li.(2009).Numerical simulation of arc properties and their effects on the weld shape.Acta Physica Sinica,58(6),S94-S103.
MLA	S. P. Lu,et al."Numerical simulation of arc properties and their effects on the weld shape".Acta Physica Sinica 58.6(2009):S94-S103.