Arc ignitability, bead protection and weld shape variations for He-Ar-O(2) shielded GTA welding on SUS304 stainless steel

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	Arc ignitability, bead protection and weld shape variations for He-Ar-O(2) shielded GTA welding on SUS304 stainless steel
	S. P. Lu; H. Fujii; K. Nogi
	2009
发表期刊	Journal of Materials Processing Technology
ISSN	0924-0136
卷号	209 期号:3 页码:1231-1239
摘要	The influences of argon and oxygen in helium base shielded GTA welding on the arc ignitability, bead protection and weld penetration are systematically investigated by bead-on-plate welding on SUS304 stainless steel. Experimental results show that the critical electrode tip work distance for arc ignition is increased from I mm under pure He shielding to 5 mm under He-50%Ar shielding. Small addition of oxygen content to the He-Ar mixed shielding can significantly change the weld shape from a wide shallow type to a narrow deep one, and the weld depth/width ratio can be doubled due to the change in the Marangoni convection from an outward to an inward direction. (C) 2008 Elsevier B.V. All rights reserved.
部门归属	[lu, shanping] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [lu, shanping; fujii, hidetoshi; nogi, kiyoshi] osaka univ, joining & welding res inst, osaka 5670047, japan.;lu, sp (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china;shplu@imr.ac.cn
关键词	Arc Ignition Weld Shape Marangoni Convection Oxygen Mixed Shielding Marangoni Convection Activating Flux Oxide Fluxes Deep Penetration Gas Tig
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32161
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. P. Lu,H. Fujii,K. Nogi. Arc ignitability, bead protection and weld shape variations for He-Ar-O(2) shielded GTA welding on SUS304 stainless steel[J]. Journal of Materials Processing Technology,2009,209(3):1231-1239.
APA	S. P. Lu,H. Fujii,&K. Nogi.(2009).Arc ignitability, bead protection and weld shape variations for He-Ar-O(2) shielded GTA welding on SUS304 stainless steel.Journal of Materials Processing Technology,209(3),1231-1239.
MLA	S. P. Lu,et al."Arc ignitability, bead protection and weld shape variations for He-Ar-O(2) shielded GTA welding on SUS304 stainless steel".Journal of Materials Processing Technology 209.3(2009):1231-1239.