Arc Shape and Weld Pool Behavior in Low-frequency Pulse TIG Backing Welding for Medium and Thick Plates

doi:10.12141/j.issn.1000-565X.180653

	Arc Shape and Weld Pool Behavior in Low-frequency Pulse TIG Backing Welding for Medium and Thick Plates
	Shi, Yu 1,2; Wang, Kaifei 2; Zhang, Gang 1,2; Zhu, Yingrui 1,2
刊名	Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science)
	2019-04-01
卷号	47 期号:4 页码:107-113
关键词	Electric welding Heat conduction High speed cameras Welds Arc shape Double sided Pulse TIG Thick plate Weld pool
ISSN号	1000565X
DOI	10.12141/j.issn.1000-565X.180653
英文摘要	The pulse TIG welding with low frequency and large duty cycle was used to realize single-side welding without subtrate and double-side forming of 16MnR steel plates with 5mm large blunt edge, in view of the low efficiency, complex process and poor stability in traditional manual welding with subtract for medium and thick plates backing welding. The compression process of welding arc passing through the molten hole was captured by a high-speed camera. And the correlation between deflection angle and length of arc tail flame and weld penetration at a certain welding speed was analyzed. The results show that a hole-shaped weld pool is formed under a certain parameters, and the deflection angle and length of the arc tail flame passing through the hole is negatively correlated with the welding speed, and positively correlated with the weld penetration. By observing the size of the arc tail flame, the weld penetration can be estimated, and the stirring and convection of liquid in weld pool is enhanced under the thermo-mechanical coupling effect of periodic arc. Under the combined action of surface tension, gravity, arc force and gas blowing force, the liquid metal on the side wall of the welding hole flows to the edge and bottom, which enhances the heat conduction in the weld pool and effectively increases the weld penetration. © 2019, Editorial Department, Journal of South China University of Technology. All right reserved.
语种	中文
出版者	South China University of Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113915]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 2.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China
推荐引用方式 GB/T 7714	Shi, Yu,Wang, Kaifei,Zhang, Gang,et al. Arc Shape and Weld Pool Behavior in Low-frequency Pulse TIG Backing Welding for Medium and Thick Plates[J]. Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science),2019,47(4):107-113.
APA	Shi, Yu,Wang, Kaifei,Zhang, Gang,&Zhu, Yingrui.(2019).Arc Shape and Weld Pool Behavior in Low-frequency Pulse TIG Backing Welding for Medium and Thick Plates.Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science),47(4),107-113.
MLA	Shi, Yu,et al."Arc Shape and Weld Pool Behavior in Low-frequency Pulse TIG Backing Welding for Medium and Thick Plates".Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) 47.4(2019):107-113.