粉末熔池耦合活性TIG焊接方法

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

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (726KB)
Export: BibTeX | EndNote (RIS)

Abstract 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.

Key words： SiO2 powder pool coupled activating TIG welding arc appearance of weld microstructure mechanical property

Published: Online: 2018-05-08

CLC number:

TG444

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	HUANG Yong
	ZHAO Wenqiang
	ZHANG Liyao

Cite this article:

HUANG Yong,ZHAO Wenqiang,ZHANG Liyao. Powder Pool Coupled Activating TIG Welding Method[J]. Materials Reports, 2017, 31(22): 70-74.

URL:

https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.022.014 OR https://www.mater-rep.com/EN/Y2017/V31/I22/70

1 Gurevich S M, Zamokov V N, Kushirenko N A. Improving the penetration of titanium alloys when they are welded by tungsten arc process[J]. Automatic Weld, 1965,18(9):1.
2 Liu Fengyao, Yang Chunli, Lin Sanbao, et al. Effect of weld microstructure on weld properties in A-TIG welding of titanium alloy[J]. Trans Nonferr Met Soc China, 2013,13(4):876.
3 Huang Yong, Wang Yanlei, Zhang Zhiguo. Impact of introduction of O2 on the welding arc of gas pool coupled activating TIG[J]. Spectrosc Spectral Anal, 2014,34(5):1168(in Chinese).
黄勇,王艳磊,张治国.氧引入对气体熔池耦合活性TIG焊电弧的影响[J].光谱学与光谱分析,2014,34(5):1168.
4 Huang Yong, Zhang Zhiguo, Wang Yanlei. Nitrogen distribution in molten pool of gas pool coupled activating TIG welding with rapid cooling method[J]. Trans China Weld Inst, 2015,2(8):31(in Chinese).
黄勇,张治国,王艳磊.气体熔池耦合活性TIG焊熔池N 元素分布骤冷分析[J].焊接学报,2015,2(8):31.
5 Huang Yong, Guo Wei, Wang Yanlei. Effects of oxygen outer gas on the weld properties of gas pool coupled activating TIG welding[J]. Trans China Weld Inst, 2016,37(9):5(in Chinese).
黄勇,郭卫,王艳磊.外层氧气引入对GPCA-TIG焊焊缝性能的影响[J].焊接学报, 2016,37(9):5.
6 Huang Yong, Li Tao, Wang Yanlei. Gas transfer flux activating TIG welding process for aluminum alloy[J]. Trans China Weld Inst, 2014, 35(1):101(in Chinese).
黄勇,李涛,王艳磊. 铝合金气体输送活性钨极氩弧焊方法[J]. 焊接学报,2014,35(1):101.
7 Huang Yong, Yao Yuhang, Zhang Jianxiao, et al. Gas transfer flux active welding for various metallic materials[J]. J Lanzhou University of Technology, 2015, 41(5):11(in Chinese).
黄勇,姚宇航,张建晓,等. 适用于不同金属材料的气体输送活性焊接方法[J]. 兰州理工大学学报, 2015,41(5):11.
8 Huang Bensheng,Yang Jiang, Yin Wenfeng, et al. Research progress and prospect of A-TIG welding[J]. Mater Rev:Rev, 2016,30(2):77(in Chinese).
黄本生,杨江,尹文锋,等.A-TIG焊研究进展及前景展望[J].材料导报:综述篇,2016,30(2):77.
9 Simonik A G. The effect of contraction of the arc discharge upon the introduction of the eletro-negative elements[J]. Weld Prod,1976,23(3):49.
10 Heiple C R, Roper J R, Stagner R T, et al. Surface active element effects on the shape of GTA, laser and electron beam welds[J]. Weld Res Supp,1983,62(3):72.
11 Huang Yong, Fan Ding, Lin Tao, et al. Arc assisted activation TIG welding process for stainless steels[J]. Trans China Weld Inst, 2009,30(10):1(in Chinese).
黄勇, 樊丁, 林涛,等. 不锈钢电弧辅助活性TIG焊[J]. 焊接学报. 2009, 30(10):1.
12 Fujii H, Sato T, Lu S P, et al. Development of an advanced A-TIG(AA-TIG) welding method by control of marangoni convection[J].Mater Sci Eng A, 2008,495(1-2):296.
13 Fan Ding, Lin Tao, Huang Yong, et al. Arc assisted activating TIG welding process[J]. Trans China Weld Inst, 2008,29(12):1(in Chinese).
樊丁, 林涛, 黄勇,等. 电弧辅助活性TIG焊接法[J].焊接学报, 2008,29(12):1.
14 Lu Shanping, Li Dongjie, Li Dianzhong, et al. Double shielded TIG welding method[J]. Trans China Weld Inst, 2010, 31(2):21(in Chinese).
陆善平, 李冬杰, 李殿中,等. 双层气流保护TIG焊接方法[J]. 焊接学报, 2010, 31(2):21.
15 Terashima S, Bhadeshi A H K D H. Changes in toughness at low oxygen concentrations in steel weld metal[J]. Sci Technol Weld Join, 2006, 11(5):509.