Effects of different activating fluxes on the surface tension of molten metal in gas tungsten arc welding

doi:10.1016/j.jmapro.2018.03.001

	Effects of different activating fluxes on the surface tension of molten metal in gas tungsten arc welding
	Li, Chunkai 1,2; Shi, Yu 1; Gu, YuFen 1; Fan, Ding 1; Zhu, Ming 1,2
刊名	JOURNAL OF MANUFACTURING PROCESSES
	2018-04
卷号	32 页码:395-402
关键词	surface tension Marangoni convection arc constriction arc temperature
ISSN号	1526-6125
DOI	10.1016/j.jmapro.2018.03.001
英文摘要	Surface tension is an important factor in arc welding and affects weld microstructure and flow mode in the weld pool. A novel surface tension measurement method based on the principle of weld pool oscillation is proposed to sense the surface tension of the weld pool without and with TiO2, NaCl, and CaF2 activating fluxes during tungsten inert gas welding process. Experimental results reveal that the TiO2 activating flux can convert the surface tension gradient from negative to positive but exerts minimal effect on arc behavior. The surface tension gradient is mainly controlled by the oxygen content in the weld pool, which determines the Marangoni convection and penetration depth. High oxygen content decreases the surface tension gradient and weakens the Marangoni convection in the weld pool. The NaCl and CaF2 activating fluxes can reduce the absolute value of average surface tension but exert negligible effects on the sign of surface tension gradient. The varied surface tension and increased penetration depth with NaCl and CaF2 activating fluxes are caused by arc constriction and increased arc temperature, respectively. (C) 2018 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[51765037] ; Plan for Basic Research Creative Group of Gansu Province[17JR5RA107] ; Project for Collaborative Innovation Team of Universities in Gansu Province[2017C-07]
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000435057100038
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32705]
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
通讯作者	Shi, Yu
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Key Lab Nonferrous Met Alloys & Proc, Minist Educ, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Chunkai,Shi, Yu,Gu, YuFen,et al. Effects of different activating fluxes on the surface tension of molten metal in gas tungsten arc welding[J]. JOURNAL OF MANUFACTURING PROCESSES,2018,32:395-402.
APA	Li, Chunkai,Shi, Yu,Gu, YuFen,Fan, Ding,&Zhu, Ming.(2018).Effects of different activating fluxes on the surface tension of molten metal in gas tungsten arc welding.JOURNAL OF MANUFACTURING PROCESSES,32,395-402.
MLA	Li, Chunkai,et al."Effects of different activating fluxes on the surface tension of molten metal in gas tungsten arc welding".JOURNAL OF MANUFACTURING PROCESSES 32(2018):395-402.