The impact toughness of a nitride-strengthened martensitic heat resistant steel

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	The impact toughness of a nitride-strengthened martensitic heat resistant steel
	W. F. Zhang; W. Yan; W. Sha; W. Wang; Q. G. Zhou; Y. Y. Shan; K. Yang
	2012
发表期刊	Science China-Technological Sciences
ISSN	1674-7321
卷号	55 期号:7 页码:1858-1862
摘要	The nitride-strengthened martensitic heat resistant steel is precipitation strengthened only by nitrides. In the present work, the effect of nitride precipitation behavior on the impact toughness of an experimental steel was investigated. Nitrides could hardly be observed when the steel was tempered at 650A degrees C. When the tempering temperature was increased to 700A degrees C and 750A degrees C, a large amount of nitrides were observed in the matrix. It was surprising to reveal that the impact energy of the half-size samples greatly increased from several Joules to nearly a hundred Joules. The ductile-brittle transition temperature (DBTT) was also discovered to decrease from room temperature to -50A degrees C when the tempering temperature was increased from 650A degrees C to 750A degrees C. The nitride precipitation with increasing tempering temperature was revealed to be responsible for the improved impact toughness.
部门归属	[zhang wenfeng; yan wei; wang wei; zhou qiangguo; shan yiyin; yang ke] chinese acad sci, inst met res, shenyang 110016, peoples r china. [zhang wenfeng] univ sci & technol china, hefei 230026, peoples r china. [zhang wenfeng; zhou qiangguo] 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.;shan, yy (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china.;yyshan@imr.ac.cn
关键词	Nitride-strengthening Martensite Heat Resistant Steel Precipitation Dbtt Impact Toughness High-temperature Creep-behavior Stress Nitrogen
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60460
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. F. Zhang,W. Yan,W. Sha,et al. The impact toughness of a nitride-strengthened martensitic heat resistant steel[J]. Science China-Technological Sciences,2012,55(7):1858-1862.
APA	W. F. Zhang.,W. Yan.,W. Sha.,W. Wang.,Q. G. Zhou.,...&K. Yang.(2012).The impact toughness of a nitride-strengthened martensitic heat resistant steel.Science China-Technological Sciences,55(7),1858-1862.
MLA	W. F. Zhang,et al."The impact toughness of a nitride-strengthened martensitic heat resistant steel".Science China-Technological Sciences 55.7(2012):1858-1862.