Time dependant weld shape in Ar-O-2 shielded stationary GTA welding

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	Time dependant weld shape in Ar-O-2 shielded stationary GTA welding
	S. P. Lu; D. Z. Li; H. Fujii; K. Nogi
	2007
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	23 期号:5 页码:650-654
摘要	The stationary gas tungsten arc welding (GTA) is carried out on SUS304 stainless steel under Ar-0.1%O-2 and Ar-0.3%O-2 mixed shielding to observe the evolution of the molten pool and investigate the role of Marangoni convection on the weld shape. After welding, the oxygen content in the weld metal was measured by using an oxygen/nitrogen analyzer. Small addition of oxygen to the argon based shielding gas can effectively adjust the weld pool oxygen content. Oxygen plays an important role as an surface active element in determining the pattern of Marangoni convection in the stainless steel weld pool. When the weld metal oxygen content is over the critical value, 0.01 wt pct, corresponding to the Ar-0.3%O-2 mixed shielding gas, the Marangoni convection changes from outward to inward direction and the weld shape dramatically changes from wide shallow shape to narrow deep shape.
部门归属	chinese acad sci, inst metal res, shenyang 110016, peoples r china. osaka univ, joining & welding res inst, osaka 5670047, japan.;lu, sp (reprint author), chinese acad sci, inst metal res, shenyang 110016, peoples r china;shplu@imr.ac.cn
关键词	Marangoni Convection Oxygen Weld Shape Marangoni Convection Oxide Fluxes Penetration
URL	查看原文
WOS记录号	WOS:000250017600017
引用统计	被引频次：10[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/321006/33739
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. P. Lu,D. Z. Li,H. Fujii,et al. Time dependant weld shape in Ar-O-2 shielded stationary GTA welding[J]. Journal of Materials Science & Technology,2007,23(5):650-654.
APA	S. P. Lu,D. Z. Li,H. Fujii,&K. Nogi.(2007).Time dependant weld shape in Ar-O-2 shielded stationary GTA welding.Journal of Materials Science & Technology,23(5),650-654.
MLA	S. P. Lu,et al."Time dependant weld shape in Ar-O-2 shielded stationary GTA welding".Journal of Materials Science & Technology 23.5(2007):650-654.