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Modeling precipitation and its effect on recrystallization during hot strip rolling of niobium steels
Dalarna University, School of Technology and Business Studies, Material Science.
2008 (English)In: 3rd Int. Conf. on Thermomechanical Processing of Steels, Padua, Italy, 2008Conference paper, Published paper (Other academic) Published
Abstract [en]

Using a physically based model, the microstructural evolution of Nb microalloyed steels during rolling in SSAB Tunnplåt’s hot strip mill was modeled. The model describes the evolution of dislocation density, the creation and diffusion of vacancies, dynamic and static recovery through climb and glide, subgrain formation and growth, dynamic and static recrystallization and grain growth. Also, the model describes the dissolution and precipitation of particles. The impeding effect on grain growth and recrystallization due to solute drag and particles is accounted for. During hot strip rolling of Nb steels, Nb in solid solution retards recrystallization due to solute drag and at lower temperatures strain-induced precipitation of Nb(C,N) may occur which effectively retard recrystallization. The flow stress behavior during hot rolling was calculated where the mean flow stress values were calculated using both the model and measured mill data. The model showed that solute drag has an essential effect on recrystallization during hot rolling of Nb steels.

Place, publisher, year, edition, pages
Padua, Italy, 2008.
Keyword [en]
varmvalsning, niob, stål, rekristallisation, solute-drag
Research subject
Stålformning och ytteknik, Analys av varmbearbetning, industriella applikationer av modellering av mikrostrukturutveckling och mekaniska egenskaper
Identifiers
URN: urn:nbn:se:du-3450OAI: oai:dalea.du.se:3450DiVA: diva2:521878
Conference
3rd Int. Conf. on Thermomechanical Processing of Steels , Padua, Italy, 12-13 september, 2008
Available from: 2008-10-15 Created: 2008-10-15 Last updated: 2012-04-24Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf