Study on arc physical characteristics of GPCA-TIG welding under different angles of V groove

doi:10.1088/2631-8695/ab3c04

	Study on arc physical characteristics of GPCA-TIG welding under different angles of V groove
	Huang Y(黄勇)
刊名	Engineering Research Express
	2019
卷号	1 期号:1 页码:015032
关键词	Chemical activation Current density Electric arcs Inert gas welding Inert gases Temperature distribution Thermocouples Welding electrodes Welds Arc characteristics Current density distribution GPCA-TIG welding Peak current density Peak temperatures Physical characteristics Tungsten electrodes Weld penetrations
ISSN号	2631-8695
DOI	10.1088/2631-8695/ab3c04
英文摘要	In the Gas Pool Coupled Activating TIG (GPCA-TIG) welding, double shielding gases are employed to dramatically enhance the weld penetration, the inner inert gas to protect tungsten electrode and molten pool metal and the outer active gas to introduce activating element oxygen. In order to examine the effects of V-groove on the arc characteristics of GPCA-TIG welding in different groove angles and welding currents, probe method, static hole method and thermocouple method were used to obtain the distributions of current density, arc pressure and temperature on the arc anode, respectively. The experimental results indicate that, in the process of groove welding, the peak current density is on both side surfaces of the groove when the groove angle is 90, while the peak of 120 groove is just below the electrode. The maximum arc pressure is located just below the electrode no matter what angle and welding current are. The temperature distribution in groove welding is similar to the current density distribution. The peak temperature is on the side surface in 90 groove, and just beneath the electrode in 120 groove. Besides, all the current density, arc pressure and temperature distribution present different dependence on arc current for different groove angles. The weakened deep weld penetration compared to that without groove results from the change of arc characteristics in the grooved GPCA-TIG welding. © 2019 IOP Publishing Ltd.
WOS研究方向	Engineering
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000670504600001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/103235]
专题	材料科学与工程学院
推荐引用方式 GB/T 7714	Huang Y. Study on arc physical characteristics of GPCA-TIG welding under different angles of V groove[J]. Engineering Research Express,2019,1(1):015032.
APA	Huang Y.(2019).Study on arc physical characteristics of GPCA-TIG welding under different angles of V groove.Engineering Research Express,1(1),015032.
MLA	Huang Y."Study on arc physical characteristics of GPCA-TIG welding under different angles of V groove".Engineering Research Express 1.1(2019):015032.