Effect of nitrogen in conjunction with oxygen on GPCA-TIG weld

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	Effect of nitrogen in conjunction with oxygen on GPCA-TIG weld
	Huang, Yong 1,2; Wang, Yanlei 1; Zhang, Zhiguo 1
刊名	Hanjie Xuebao/Transactions of the China Welding Institution
	2015-04-25
卷号	36 期号:4 页码:1-4
关键词	Chemical activation Gas welding Gases Grain boundaries Inert gas welding Lakes Laser beam welding Microstructure Nitrogen Nozzles Oxygen Shielding Temperature Tensile strength Activating TIG welding Austenite grain boundaries Coupling degree Low temperature impact toughness Microstructure and properties Oxygen content Relative positions Weld appearances
ISSN号	0253360X
英文摘要	For the gas pool coupled activating TIG (GPCA-TIG) welding with outer mixing shielding gas of nitrogen and oxygen, by changing the relative position of the outer and inner nozzles of welding torch, the effect of coupling degree between the outer shielding gas and welding pool surface on nitrogen-oxygen content in the weld appearance, microstructure and properties. The results show that the gas pool coupled activating TIG weld was narrow and deep when nitrogen was introduced in conjunction with oxygen. The low temperature impact toughness of weld was 7.5% higher than that of parent metal and weld made by traditional TIG welding, while the tensile strength and yield strength of weld by GPCA-TIG was lower than those of parent metal. The grains in the weld were fine, and a small amount of ferrites distributed in the austenite grain boundaries. The nitrogen-oxygen content in the weld could be finely adjusted through changing the relative position of outer and inner nozzles in GPCA-TIG welding. ©, 2015, Harbin Research Institute of Welding. All right reserved.
语种	中文
出版者	Harbin Research Institute of Welding
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/112825]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
作者单位	1.Key Laboratory of Non-ferrous Metal Alloys and Processing, Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China 2.State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Huang, Yong,Wang, Yanlei,Zhang, Zhiguo. Effect of nitrogen in conjunction with oxygen on GPCA-TIG weld[J]. Hanjie Xuebao/Transactions of the China Welding Institution,2015,36(4):1-4.
APA	Huang, Yong,Wang, Yanlei,&Zhang, Zhiguo.(2015).Effect of nitrogen in conjunction with oxygen on GPCA-TIG weld.Hanjie Xuebao/Transactions of the China Welding Institution,36(4),1-4.
MLA	Huang, Yong,et al."Effect of nitrogen in conjunction with oxygen on GPCA-TIG weld".Hanjie Xuebao/Transactions of the China Welding Institution 36.4(2015):1-4.