Numerical study and comparisons of gas tungsten arc properties between argon and nitrogen

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	Numerical study and comparisons of gas tungsten arc properties between argon and nitrogen
	S. P. Lu; W. C. Dong; D. Z. Li; Y. Y. Li
	2009
发表期刊	Computational Materials Science
ISSN	0927-0256
卷号	45 期号:2 页码:327-335
摘要	In this paper, nitrogen Was used as in alternative gas for its fine protection to weld pool and relatively low cost, in contrast to Widely used argon and helium shielding gases ill gas tungsten arc welding (GTAW). A two-dimensional axisymmetric numerical model from McKelliget et al. was adopted to describe the heat transfer and fluid flow in the gas tungsten arc (GTA) to predict the basic energy source properties of nitrogen GTA. Simulation results showed that the arc temperature contours. the distribution of heat flux and Current density at the anode agree well with experimental results in literature for both argon-shielded arc and nitrogen-shielded arc. To solve the model, the nitrogen arc plasma properties, i.e. temperature, voltage drop and flow fields have been derived. And the distribution of the heat flux, current density and gas shear stress at the anode with the different arc lengths and welding currents has been Studied. Moreover, by comparing with the properties between the argon and nitrogen arc, the results indicate that the nitrogen arc is more contraction than that of argon arc Under the same arc length and welding Cut rent. Especially. the increasing of the maximum Of heat flux and Current density at the anode shows that the nitrogen GTA possessed excellent energy source properties for GTAW in contrast to the argon arc. (C) 2003 Elsevier B.V. All rights reserved.
部门归属	[lu, shanping; dong, wenchao; li, dianzhong; li, yiyi] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;lu, sp (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 Simulation Arc Plasma Nitrogen Argon Welding Arc Temperature-measurements Heat-transfer Electric-arc Anode Plasma Model
URL	查看原文
WOS记录号	WOS:000265005500019
引用统计	被引频次：34[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/321006/32159
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 study and comparisons of gas tungsten arc properties between argon and nitrogen[J]. Computational Materials Science,2009,45(2):327-335.
APA	S. P. Lu,W. C. Dong,D. Z. Li,&Y. Y. Li.(2009).Numerical study and comparisons of gas tungsten arc properties between argon and nitrogen.Computational Materials Science,45(2),327-335.
MLA	S. P. Lu,et al."Numerical study and comparisons of gas tungsten arc properties between argon and nitrogen".Computational Materials Science 45.2(2009):327-335.