Effect of N on the Microstructure and Mechanical Properties of High Si Martensitic Heat-Resistant Steels

IMR OpenIR

	Effect of N on the Microstructure and Mechanical Properties of High Si Martensitic Heat-Resistant Steels
	J. Sun; Y. T. Zhang; P. Wang; Z. F. Ye; D. Z. Li
	2014
发表期刊	Acta Metallurgica Sinica-English Letters
ISSN	1006-7191
卷号	27 期号:4 页码:573-584
摘要	In order to investigate the effect of N on the microstructure and room temperature mechanical properties of new-type high silicon martensitic heat-resistant steels, three steels containing the same total content of C and N but different N contents have been designed and prepared according to the thermo-calc calculation. The thermodynamic calculation and experiments indicate that the replacing of C by N changes the kind and volume fraction of precipitates of the high Si martensitic steel significantly. Along with the N content increasing, the precipitates in the samples after 750 degrees C tempering change from (Cr23C6 + VN + TaC) to (Cr23C6 + VN + TaC + TaN) and finally to (Cr23C6 + VN + Cr2N) according to both experimental results and thermodynamic calculations. The room temperature mechanical tests show that the strength of the steel decreases as the N content increases. However, the Charpy impact toughness increases with N content increasing. According to the calculation and SEM observation, it is inferred that the decrease of amount and size of precipitates accounts for the changes of the mechanical properties.
部门归属	[sun, jia ; zhang, yutuo] shenyang ligong univ, shenyang 110159, peoples r china. [sun, jia ; zhang, yutuo ; wang, pei ; ye, zhongfei ; li, dianzhong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; zhang, yt (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; ytzhang@imr.ac.cn ; pwang@imr.ac.cn
关键词	Martensitic Heat-resistant Steels Nitrogen Thermo-calc Precipitates Mechanical Properties Bismuth Eutectic Lbe Liquid Lead-bismuth Stainless-steel Numerical-simulation Enriched Steels Cr Steels Corrosion Behavior T91 Precipitation
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73374
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Sun,Y. T. Zhang,P. Wang,et al. Effect of N on the Microstructure and Mechanical Properties of High Si Martensitic Heat-Resistant Steels[J]. Acta Metallurgica Sinica-English Letters,2014,27(4):573-584.
APA	J. Sun,Y. T. Zhang,P. Wang,Z. F. Ye,&D. Z. Li.(2014).Effect of N on the Microstructure and Mechanical Properties of High Si Martensitic Heat-Resistant Steels.Acta Metallurgica Sinica-English Letters,27(4),573-584.
MLA	J. Sun,et al."Effect of N on the Microstructure and Mechanical Properties of High Si Martensitic Heat-Resistant Steels".Acta Metallurgica Sinica-English Letters 27.4(2014):573-584.