Effect of Mg Addition on the Microstructure and Properties of a Heat-Affected Zone in Submerged Arc Welding of an Al-Killed Low Carbon Steel

doi:10.3390/ma14092445

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	Effect of Mg Addition on the Microstructure and Properties of a Heat-Affected Zone in Submerged Arc Welding of an Al-Killed Low Carbon Steel
	Li, Yandong 2; Xing, Weiwei 1; Li, Xiaobing 1; Chen, Bo 1; Ma, Yingche 1; Liu, Kui 1; Min, Yi 3
刊名	MATERIALS
	2021-05-01
卷号	14 期号:9 页码:19
关键词	Al-deoxidized low carbon steel Mg– Al– O inclusion heat-affected zone (HAZ) acicular ferrite submerged arc welding
DOI	10.3390/ma14092445
通讯作者	Li, Xiaobing(xbli@imr.ac.cn)
英文摘要	To reveal the effect of Mg treatment on the microstructure evolution behavior in the actual steel welding process, the microstructure and properties of Al-deoxidized high-strength ship plate steel with Mg addition were analyzed after double-side submerged arc welding. It was found that the Al-Mg-O + MnS inclusion formed under 26 ppm Mg treatment could promote acicular ferrite (AF) nucleation in the coarse-grained heat-affected zone (CGHAZ) and inhibit the formation of widmanstatten ferrite and coarse grain boundary ferrite. In the fine-grained heat-affected zone (FGHAZ) and intercritical heat-affected zone (ICHAZ), polygonal ferrite and pearlite were dominant. Al-Mg-O+MnS cannot play a role in inducing AF, but the grain size of ferrite was refined by Mg addition. The impact toughness in HAZ of the Mg-added steel was higher than that of Mg-free steel. With the heat-input rising from 29.55 to 44.11 kJ/cm, it remained relatively stable in Mg-treated steel. From the fusion line to the base metal, the micro-hardness of the fusion zone, CGHAZ, ICHAZ and FGHAZ decreased to some extent after Mg addition, which means the cold cracking tendency in the welding weak zone could be reduced. Finally, the mechanisms of Mg-containing inclusion-induced AF were also systematically discussed.
资助项目	National Natural Science Foundation of China[51801210]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种	英语
出版者	MDPI
WOS记录号	WOS:000650634500001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/161606]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, Xiaobing
作者单位	1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Yangtze Normal Univ, Key Lab Extraordinary Bond Engn & Adv Mat Technol, Chongqing 408100, Peoples R China 3.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Li, Yandong,Xing, Weiwei,Li, Xiaobing,et al. Effect of Mg Addition on the Microstructure and Properties of a Heat-Affected Zone in Submerged Arc Welding of an Al-Killed Low Carbon Steel[J]. MATERIALS,2021,14(9):19.
APA	Li, Yandong.,Xing, Weiwei.,Li, Xiaobing.,Chen, Bo.,Ma, Yingche.,...&Min, Yi.(2021).Effect of Mg Addition on the Microstructure and Properties of a Heat-Affected Zone in Submerged Arc Welding of an Al-Killed Low Carbon Steel.MATERIALS,14(9),19.
MLA	Li, Yandong,et al."Effect of Mg Addition on the Microstructure and Properties of a Heat-Affected Zone in Submerged Arc Welding of an Al-Killed Low Carbon Steel".MATERIALS 14.9(2021):19.