Microstructure and charpy impact toughness of a 2.25Cr-1Mo-0.25V steelweld metal

doi:10.3390/ma13133013

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	Microstructure and charpy impact toughness of a 2.25Cr-1Mo-0.25V steelweld metal
	Wu, Kefan 1,3; Yan, Yingjie 1,3; Cao, Rui 1,3; Li, Xinyu 2; Jiang, Yong 2; Yang, Fei 2; Jia, Xingwang 2; Chen, Jianhong 1,3
刊名	Materials
	2020-07-01
卷号	13 期号:13
关键词	Austenite Bainite Chromium alloys Chromium metallography Ferrite Heat resistance Low temperature operations Microstructure Molybdenum metallography Steam power plants Temperature Ternary alloys Tungsten metallography Vanadium metallography Welding Welds Charpy impact toughness Confocal laser scanning microscopy Evolution of the microstructure Heat-resistance steels Low temperature impact toughness Low temperature toughness Post weld heat treatment Ultra-supercritical power plants
DOI	10.3390/ma13133013
英文摘要	The demand for heat-resistant steel has increased owing to its utility in numerous devices that must withstand high steam pressures and high temperatures, such as turbine rotors and blades in ultra-supercritical power plants. It is inevitable to join heat-resistance steel part by welding method, so it is important to maintain the toughness of the weld metals. In this study, the microstructure, low-temperature impact toughness, and fracture surface of as-welded and post-weld heat treatment (PWHT) of 2.25Cr-1Mo-0.25V weld metal were investigated. The microstructures of the as-welded and PWHT specimens are granular bainite and ferrite, respectively. This work revealed the relationship between effective microstructure nearby crack initiation origin and low temperature impact toughness for both the as-welded and PWHT specimens. The evolution of the microstructure and prior austenite was then investigated using confocal laser scanning microscopy (CLSM) to observe the formation of coarse ferrite grain structures. A suggestion for enhancing the low-temperature toughness was provided based on the effect of adjusting Mn content and forming acicular ferrite. © 2020 by the authors.
语种	英语
出版者	MDPI AG, Postfach, Basel, CH-4005, Switzerland
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115342]
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
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Atlantic China Welding Consumables, Inc., Zigong; 643000, China 3.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Wu, Kefan,Yan, Yingjie,Cao, Rui,et al. Microstructure and charpy impact toughness of a 2.25Cr-1Mo-0.25V steelweld metal[J]. Materials,2020,13(13).
APA	Wu, Kefan.,Yan, Yingjie.,Cao, Rui.,Li, Xinyu.,Jiang, Yong.,...&Chen, Jianhong.(2020).Microstructure and charpy impact toughness of a 2.25Cr-1Mo-0.25V steelweld metal.Materials,13(13).
MLA	Wu, Kefan,et al."Microstructure and charpy impact toughness of a 2.25Cr-1Mo-0.25V steelweld metal".Materials 13.13(2020).