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Inclusions for Ultra-pure Ferritic Stainless Steels Containing 21% Chromium
Alternative TitleInclusions for Ultra-pure Ferritic Stainless Steels Containing 21% Chromium
Wang Hongpo; Sun Lifeng; Peng Bo; Jiang Maofa
2013
Source PublicationJOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
ISSN1006-706X
Volume20Issue:10Pages:70-74
AbstractAs 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.
Other AbstractAs 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.
KeywordLIQUID-IRON TITANIUM-OXIDES THERMODYNAMICS EQUILIBRIUM EVOLUTION BEHAVIOR OXYGEN MELT ultra-pure ferritic stainless steel ingot inclusion stabilizing element
Indexed ByCSCD
Language英语
Funding Project[Fundamental Research Funds for Central Universities of China] ; [National Natural Science Foundation of China]
CSCD IDCSCD:4958492
Citation statistics
Cited Times:3[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/147604
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
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.
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