Investigation on the Low-temperature Impact Toughness of Shielded Metal Arc Welding Weld Metals in Cr-Mo-V Heat-resistant Steel

doi:10.11896/cldb.20120001

	Investigation on the Low-temperature Impact Toughness of Shielded Metal Arc Welding Weld Metals in Cr-Mo-V Heat-resistant Steel
	Dong, Wanlong 1,2; Cao, Rui1,2 ; Jiang, Yong 3; Yang, Fei 3; Huang, Yifang 3; Xu, Xiaolong 3; Chen, Jianhong1,2
	2022-08-10
发表期刊	Cailiao Daobao/Materials Reports
ISSN	1005-023X
卷号	36 期号:15
摘要	In this work, the reason of the deteriorated low-temperature impact toughness and the instability of toughness of heat-resistant steel weld metals (i.e. multi-layer and multi-pass) obtained by shielded metal arc welding were revealed, the relationship between the microstructure and low-temperature impact toughness in as-welded and after post-weld heat treatment (PWHT) were investigated. The low-temperature impact energy is obtained through the Charpy impact test at -30 . The microstructure is characterized by optical microscope (OM), scanning electron microscope (SEM), energy dispersive spectrum analysis (EDS), etc. It is found that the impact toughness sharply decreases due to a large number of poor plasticity, brittle and hard martensite-austenite (M-A) constituents in as-welded samples. The impact toughness is mainly dependent on the start time of cracking and thereby is determined by the coarsest ferrite grain size in the columnar grain region. The toughness of the weld metal is also affected by different types of microstructures in the weld metals, i.e.: acicular ferrite (AF) with the optimal toughness, the side-plate ferrite (SPF) and grain boundary ferrite (GBF) with inferior toughness and the coarse and massive ferrite with the worst toughness. It is worth noting that an adverse effect on toughness also results from a stress concentration caused by continuously distributed M-A and aggregated carbide clusters. © 2022 Cailiao Daobaoshe/ Materials Review. All rights reserved.
关键词	Carbides Chromium alloys Ferrite Fracture toughness Grain boundaries Grain size and shape Martensite Metals Microstructure Molybdenum alloys Molybdenum compounds Scanning electron microscopy Spectrum analysis Temperature Welds Grainsize Heat-resistant steel Low temperature impact toughness Martensite-austenite Multi-layers Multi-pass Postweld heat treatment Shielded metal arc welding Steel weld metal Weld metal
DOI	10.11896/cldb.20120001
收录类别	EI
语种	中文
出版者	Cailiao Daobaoshe/ Materials Review
EI入藏号	20223912794235
EI主题词	Austenite
EI分类号	531.2 Metallography ; 538.2 Welding ; 543.1 Chromium and Alloys ; 543.3 Molybdenum and Alloys ; 641.1 Thermodynamics ; 804.2 Inorganic Compounds ; 812.1 Ceramics ; 951 Materials Science
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/160161
专题	材料科学与工程学院_特聘教授组材料科学与工程学院
作者单位	1.Department of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Sichuan Atlantic Welding Materials Co., Ltd., Sichuan, Zigong; 643000, China
第一作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Dong, Wanlong,Cao, Rui,Jiang, Yong,et al. Investigation on the Low-temperature Impact Toughness of Shielded Metal Arc Welding Weld Metals in Cr-Mo-V Heat-resistant Steel[J]. Cailiao Daobao/Materials Reports,2022,36(15).
APA	Dong, Wanlong.,Cao, Rui.,Jiang, Yong.,Yang, Fei.,Huang, Yifang.,...&Chen, Jianhong.(2022).Investigation on the Low-temperature Impact Toughness of Shielded Metal Arc Welding Weld Metals in Cr-Mo-V Heat-resistant Steel.Cailiao Daobao/Materials Reports,36(15).
MLA	Dong, Wanlong,et al."Investigation on the Low-temperature Impact Toughness of Shielded Metal Arc Welding Weld Metals in Cr-Mo-V Heat-resistant Steel".Cailiao Daobao/Materials Reports 36.15(2022).