Behaviors and effects of Zn coating on welding-brazing process of Al-Steel and Mg-steel dissimilar metals

doi:10.1016/j.jmapro.2018.01.001

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

	Behaviors and effects of Zn coating on welding-brazing process of Al-Steel and Mg-steel dissimilar metals
	Cao, R.; Chang, J. H.; Huang, Q.; Zhang, X. B.; Yan, Y. J.; Chen, J. H.
刊名	JOURNAL OF MANUFACTURING PROCESSES
	2018-01
卷号	31 页码:674-688
关键词	Welding-brazing Magnesium/aluminum alloy Zinc coating
ISSN号	1526-6125
DOI	10.1016/j.jmapro.2018.01.001
英文摘要	The behaviors and effects of Zn-coating on the welding-brazing processes of steel with aluminum and magnesium were investigated by Cold Metal Transfer (CMT) arc. The behaviors of Zn-coating at the very beginning of burning and during the spreading of the liquid aluminum and liquid magnesium droplet over the steel plate were observed respectively. The effects of Zn-coating on the wetting process of liquid droplets and on the fracture of welding-brazing joints were analyzed. The effects of Zn-coating on joining mechanisms and tensile load of Al-steel joints and Mg-steel joint were compared and analyzed. For Al-steel, Mg-steel, some common behaviors can be found, the main effect of Zn is its evaporation which decreases the temperature at the interface to prevent steel from melting and makes the steel to expose the fresh metallic surface which is much easier to be spread by a liquid droplet than an oxidized surface. Zn-coating improves the wettability of liquid Al or liquid Mg over the steel surface. However, some effects of zinc coating on wetting behavior, joining mechanisms and tensile load of Al-steel joints and Mg-steel joint are still different. For Al-steel arc, Zn-rich triangle zone is not formed by driving the liquid Zn from inside and accumulated at the toe, rather it is formed by the diffusion of the liquid Zn from outside Zn-enriched periphery into the droplet. In the case of Mg-steel arc, the Zn-rich zone forms partly due to the accumulation of Zn driven from the center during the Zn evaporation. For Al-steel joint, Zinc coating has not reacted to form the interface layer between Al weld metal and steel, however, zinc coating reacted to form the interface layer between Mg weld metal and steel. Zinc coating improved the strength of Al-steel joints, but, it is not beneficial to the strength of Mg-steel joint. (C) 2018 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.
资助项目	National Nature Science Foundation of China[51675255][51761027][51265028] ; Program of Innovation Groups of Basic Research of Gansu Province[17JR5RA107] ; Foundation of Collaborative Innovation Teams in College of 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:000427310300060
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32841]
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材料科学与工程学院附属中学
通讯作者	Cao, R.
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping 287 Rd, Qilihe Dist 730050, Peoples R China
推荐引用方式 GB/T 7714	Cao, R.,Chang, J. H.,Huang, Q.,et al. Behaviors and effects of Zn coating on welding-brazing process of Al-Steel and Mg-steel dissimilar metals[J]. JOURNAL OF MANUFACTURING PROCESSES,2018,31:674-688.
APA	Cao, R.,Chang, J. H.,Huang, Q.,Zhang, X. B.,Yan, Y. J.,&Chen, J. H..(2018).Behaviors and effects of Zn coating on welding-brazing process of Al-Steel and Mg-steel dissimilar metals.JOURNAL OF MANUFACTURING PROCESSES,31,674-688.
MLA	Cao, R.,et al."Behaviors and effects of Zn coating on welding-brazing process of Al-Steel and Mg-steel dissimilar metals".JOURNAL OF MANUFACTURING PROCESSES 31(2018):674-688.