Inclusions for Ultra-pure Ferritic Stainless Steels Containing 21% Chromium

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	Inclusions for Ultra-pure Ferritic Stainless Steels Containing 21% Chromium
其他题名	Inclusions for Ultra-pure Ferritic Stainless Steels Containing 21% Chromium
	Wang Hongpo; Sun Lifeng; Peng Bo; Jiang Maofa
	2013
发表期刊	JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
ISSN	1006-706X
卷号	20 期号:10 页码:70-74
摘要	As stabilizing elements added into ultra-pure ferritic stainless steels, niobium and titanium react with carbon and nitrogen to form carbonitrides and have great effects on the ratio of equiaxed zone and the grain size of solidification structure of ingots, which remarkably affect the quality of cold-rolled sheets. Combined with thermodynamic calculation, style and precipitation progress of inclusions in ultra-pure ferritic stainless steels were investigated by optical microscopy, scanning electron microscopy, transmission electron microscopy and energy dispersive spectroscopy. The results indicate that the inclusions are mainly Ti-Al-N-O system inclusions in ultra-pure ferritic stainless steels. Al2O3 starts to precipitate firstly and then TiOx and TiN precipitates sequently. The inclusions are mainly single TiN particles and complex inclusions with Al2O3-Ti2O3 as cores and covered with TiN under the condition of 0. 31% titanium addition and mainly Al2O3 under the condition of 0.01% titanium addition. A few (Nb, Ti)N particles precipitate because of no enough titanium to react with nitrogen when titanium addition is 0. 01%. In addition, fine Nb(C,N) particles with size of less than 500 nm precipitate at relatively low temperature.
其他摘要	As stabilizing elements added into ultra-pure ferritic stainless steels, niobium and titanium react with carbon and nitrogen to form carbonitrides and have great effects on the ratio of equiaxed zone and the grain size of solidification structure of ingots, which remarkably affect the quality of cold-rolled sheets. Combined with thermodynamic calculation, style and precipitation progress of inclusions in ultra-pure ferritic stainless steels were investigated by optical microscopy, scanning electron microscopy, transmission electron microscopy and energy dispersive spectroscopy. The results indicate that the inclusions are mainly Ti-Al-N-O system inclusions in ultra-pure ferritic stainless steels. Al_2O_3 starts to precipitate firstly and then TiO_x and TiN precipitates sequently. The inclusions are mainly single TiN particles and complex inclusions with Al_2O_3-Ti_2O_3 as cores and covered with TiN under the condition of 031% titanium addition and mainly Al2O3 under the condition of 001% titanium addition. A few (Nb,Ti)N particles precipitate because of no enough titanium to react with nitrogen when titanium addition is 001%. In addition, fine Nb(C,N) particles with size of less than 500 nm precipitate at relatively low temperature.
关键词	LIQUID-IRON TITANIUM-OXIDES THERMODYNAMICS EQUILIBRIUM EVOLUTION BEHAVIOR OXYGEN MELT ultra-pure ferritic stainless steel ingot inclusion stabilizing element
收录类别	CSCD
语种	英语
资助项目	[Fundamental Research Funds for Central Universities of China] ; [National Natural Science Foundation of China]
CSCD记录号	CSCD:4958492
引用统计	被引频次：3[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/147604
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Wang Hongpo,Sun Lifeng,Peng Bo,et al. Inclusions for Ultra-pure Ferritic Stainless Steels Containing 21% Chromium[J]. JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,2013,20(10):70-74.
APA	Wang Hongpo,Sun Lifeng,Peng Bo,&Jiang Maofa.(2013).Inclusions for Ultra-pure Ferritic Stainless Steels Containing 21% Chromium.JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,20(10),70-74.
MLA	Wang Hongpo,et al."Inclusions for Ultra-pure Ferritic Stainless Steels Containing 21% Chromium".JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL 20.10(2013):70-74.