Effects of Boron Content on the Microstructure and Impact Toughness of 12Cr1MoVR Low-Alloy Heat-Resistant Steel Weld Metals

doi:10.3390/ma14040926

	Effects of Boron Content on the Microstructure and Impact Toughness of 12Cr1MoVR Low-Alloy Heat-Resistant Steel Weld Metals
	Dou, Guishan 1,2; Cao, Rui 1,2; Cai, Changliang 1,2; Han, Cheng 1,2; Guo, Xili 3; Jiang, Yong 3; Chen, Jianhong 1,2
刊名	MATERIALS
	2021
卷号	14 期号:4
关键词	low-Cr heat-resistant steel weld metal impact toughness microstructure hardness boron
DOI	10.3390/ma14040926
英文摘要	The impact toughness of low-Cr heat-resistant steel weld metal is an important problem to broaden the application of low-Cr heat-resistant steel. In this study, the microstructure and impact toughness of 12Cr1MoVR low-alloy heat-resistant steel weld metals with various boron contents (B1 = 0.0028%, B2 = 0.0054%, and B3 = 0.0079%) were investigated. The microstructures of all weld metals were composed of block ferrite, carbides, and inclusions. Results indicated that with increased B content, prior austenite grain sizes decreased, and minor microstructure changes could be found. With the increase in B content from 0.0028% to 0.0054% to 0.0079%, the ductile-brittle transition temperature of the weld metals decreased from 30 to 0 to -14 degrees C, the toughness of weld metal increased, and the hardness slightly decreased, all of which are directly related to the refinement of prior austenite grain size because of the addition of B content. However, on the top-shelf zone, such as at the testing temperature of 80 degrees C, ductile fracture dominates the fracture surface; with the increase in B content, the size and density of inclusions increased gradually, which led to the decrease of the impact toughness at 80 degrees C when the B content was 0.0079%.
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:000624119700001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147471]
专题	材料科学与工程学院
作者单位	1.Lanzhou Univ Technol, Dept Mat Sci & Engn, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 3.Atlantic China Welding Consumables Inc, Zigong 643000, Peoples R China
推荐引用方式 GB/T 7714	Dou, Guishan,Cao, Rui,Cai, Changliang,et al. Effects of Boron Content on the Microstructure and Impact Toughness of 12Cr1MoVR Low-Alloy Heat-Resistant Steel Weld Metals[J]. MATERIALS,2021,14(4).
APA	Dou, Guishan.,Cao, Rui.,Cai, Changliang.,Han, Cheng.,Guo, Xili.,...&Chen, Jianhong.(2021).Effects of Boron Content on the Microstructure and Impact Toughness of 12Cr1MoVR Low-Alloy Heat-Resistant Steel Weld Metals.MATERIALS,14(4).
MLA	Dou, Guishan,et al."Effects of Boron Content on the Microstructure and Impact Toughness of 12Cr1MoVR Low-Alloy Heat-Resistant Steel Weld Metals".MATERIALS 14.4(2021).