Powder Pool Coupled Activating TIG Welding Method

doi:10.11896/j.issn.1005-023X.2017.022.014

	Powder Pool Coupled Activating TIG Welding Method
	Huang, Yong; Zhao, Wenqiang; Zhang, Liyao
刊名	Cailiao Daobao/Materials Review
	2017-11-25
卷号	31 期号:11 页码:70-74
关键词	Chemical activation Efficiency Electrodes Ferrite Flow of fluids Inert gas welding Inert gases Machinery Mechanical properties Microstructure Morphology Powder metals Silica Silicon Silicon alloys Tensile strength Thallium alloys Toughness Welds Activating TIG welding Ferrite morphologies Lower temperatures Powder-feeding devices SiO2 SUS 304 stainless steel Tungsten electrodes Weld penetrations
ISSN号	1005023X
DOI	10.11896/j.issn.1005-023X.2017.022.014
英文摘要	The present work aims to develop and display a novel activating welding method, i.e. powder pool coupled activating TIG (PPCA-TIG) welding. Amongst the PPCA-TIG welding, tungsten was protected by inner layer argon or other inert gas, meanwhile the activated flux powder mixing protective gas was transported into the outer layer of arc-molten pool area by the automatic powder feeding device to realize the aim of increasing the depth of penetration, improving the welding efficiency and welding mechanization and automatization. Based on the SUS304 stainless steel, the conventional DC TIG welding and SiO2 activated flux of DC PPCA-TIG welding were performed, and then the effect of SiO2 flux on the arc morphology, weld appearance of welding process, microstructure and the mechanical properties were studied. The results show that SiO2 can constrict the arc plasma, change the weld pool fluid flow mode and augment the depth of weld penetration to 3 times more than that of the conventional TIG welding, and the welding efficiency is obviously improved. The microstructure of the weld is mainly consist of austenite and ferrite, the ferrite morphology is mainly skeleton. Weld tensile strength is slightly lower than that of the base metal, while compared with the conventional TIG welding, it improves the yield strength slightly, and the lower temperature impact toughness of the weld is 96.8% of TIG weld, which shows favorable mechanical properties. At the same time, the PPCA-TIG method can effectively avoid the pollution on the tungsten electrode from the activated flux powder. © 2017, Materials Review Magazine. All right reserved.
语种	中文
出版者	Cailiao Daobaoshe/ Materials Review
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114060]
专题	材料科学与工程学院
作者单位	State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Huang, Yong,Zhao, Wenqiang,Zhang, Liyao. Powder Pool Coupled Activating TIG Welding Method[J]. Cailiao Daobao/Materials Review,2017,31(11):70-74.
APA	Huang, Yong,Zhao, Wenqiang,&Zhang, Liyao.(2017).Powder Pool Coupled Activating TIG Welding Method.Cailiao Daobao/Materials Review,31(11),70-74.
MLA	Huang, Yong,et al."Powder Pool Coupled Activating TIG Welding Method".Cailiao Daobao/Materials Review 31.11(2017):70-74.