Joint Penetration Monitoring in Low-Frequency Pulsed GTA Root Pass Welding of Medium-Thick Steel Plates

doi:10.29391/2021.100.025

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Joint Penetration Monitoring in Low-Frequency Pulsed GTA Root Pass Welding of Medium-Thick Steel Plates
	Zhu, Z.2; Zhang, G.1,2; Wang, K.2; Shi, Y.2; Zhu, M.2
刊名	WELDING JOURNAL
	2021-09
卷号	100 期号:9 页码:281S-290S
关键词	GTAW Weld Joint Penetration Root Pass Welding Arc Tail Flame Medium-Thick Steel Plates
ISSN号	0043-2296
DOI	10.29391/2021.100.025
英文摘要	Welder-dependent manufacturing is no longer suitable for the modern production of a high-performance nuclear pressure container. The high-quality root pass welding of medium-thick steel plates is the main challenge to obtain a sturdy reactor vessel, especially to generate one-sided welding with back-formation bead without a backing. Herein, low frequency and large duty-cycle pulsed gas tungsten arc welding (GTAW) was employed to weld the medium-thick steel plates with a 5-mm root face and 2-mm root opening. The arc characteristic and weld pool dynamic behavior in the proposed GTA root pass welding was investigated by a highspeed camera, and a deflection phenomenon of arc tail flame was first found. The correlations of the characteristic parameters of the arc tail flame, including the deflected angle and length, with the weld joint penetration and welding speed were also analyzed in detail. The results showed a negative correlation to the welding speed and a positive correlation with the weld joint penetration. A sound weld bead was formed at a range from 15 deg and 20 mm to 19 deg and 27 mm. Based on the above relationship, a new method using these two characteristic parameters was proposed to identify the weld joint penetration in the root pass welding, and its fundamentals were completely demonstrated by the dynamic change of the keyhole. Its feasibility was also demonstrated by the experiment combined with the weld pool dynamic-dependent theoretical analysis.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	AMER WELDING SOC
WOS记录号	WOS:000697562600020
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148872]
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
作者单位	1.Beijing Inst Petrochem Technol, Optomechatron Equipment Technol Beijing Area Majo, Beijing, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou, Peoples R China;
推荐引用方式 GB/T 7714	Zhu, Z.,Zhang, G.,Wang, K.,et al. Joint Penetration Monitoring in Low-Frequency Pulsed GTA Root Pass Welding of Medium-Thick Steel Plates[J]. WELDING JOURNAL,2021,100(9):281S-290S.
APA	Zhu, Z.,Zhang, G.,Wang, K.,Shi, Y.,&Zhu, M..(2021).Joint Penetration Monitoring in Low-Frequency Pulsed GTA Root Pass Welding of Medium-Thick Steel Plates.WELDING JOURNAL,100(9),281S-290S.
MLA	Zhu, Z.,et al."Joint Penetration Monitoring in Low-Frequency Pulsed GTA Root Pass Welding of Medium-Thick Steel Plates".WELDING JOURNAL 100.9(2021):281S-290S.