Nitride-strengthened reduced activation ferritic/martensitic steels

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	Nitride-strengthened reduced activation ferritic/martensitic steels
	P. Hu; W. Yan; L. F. Deng; W. Sha; Y. Y. Shan; K. Yang
	2010
发表期刊	Fusion Engineering and Design
ISSN	0920-3796
卷号	85 期号:7-9 页码:1632-1637
摘要	Two nitride-strengthened reduced activation ferritic/martensitic (RAFM) steels with different Mn contents were investigated. The experimental steels were designed based on the chemical composition of Eurofer 97 steel but the C content was reduced to an extremely low level. Microstructure observation and hardness tests showed that the steel with low Mn content (0.47 wt.%) could not obtain a full martensitic microstructure due to the inevitable delta-ferrite independent of cooling rate after soaking. This steel showed similar room temperature strength and higher strength at 600 degrees C, but lower impact toughness, compared with Eurofer 97 steel. Fractography of the Charpy impact specimen revealed that the low room temperature toughness should be related to the Ta-rich inclusions initiating the cleavage fracture. The larger amount of V-rich nitrides and more dissolved Cr in the matrix could be responsible for the strength being similar to Eurofer 97 steel. In the second steel developed from the first steel by increasing the Mn content from 0.47 wt.% to 3.73 wt.%, a microstructure of full martensite could be obtained. (C) 2010 Elsevier B.V. All rights reserved.
部门归属	[hu, ping; yan, wei; deng, li-fen; shan, yi-yin; yang, ke] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china. [hu, ping; deng, li-fen] chinese acad sci, grad sch, beijing 100049, peoples r china. [sha, wei] queens univ belfast, sch planning architecture & civil engn, belfast bt9 5ag, antrim, north ireland.;yan, w (reprint author), chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, liaoning, peoples r china;weiyan@imr.ac.cn
关键词	Rafm Steel Nitride Strengthened Delta-ferrite Mechanical Property Cleavage Fracture Martensitic 9cr Steels Heat-resistant Steel Creep-behavior Precipitation Behavior High-temperature Microstructure Carbon Tungsten Carbonitrides
URL	查看原文
WOS记录号	WOS:000287333200129
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31159
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. Hu,W. Yan,L. F. Deng,et al. Nitride-strengthened reduced activation ferritic/martensitic steels[J]. Fusion Engineering and Design,2010,85(7-9):1632-1637.
APA	P. Hu,W. Yan,L. F. Deng,W. Sha,Y. Y. Shan,&K. Yang.(2010).Nitride-strengthened reduced activation ferritic/martensitic steels.Fusion Engineering and Design,85(7-9),1632-1637.
MLA	P. Hu,et al."Nitride-strengthened reduced activation ferritic/martensitic steels".Fusion Engineering and Design 85.7-9(2010):1632-1637.