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Prediction of the microstructural evolution during hot strip rolling of Nb microalloyed steels
Dalarna University, School of Technology and Business Studies, Material Science.
2007 (English)In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 558-559, no 2, p. 1127-1132Article in journal (Refereed) Published
Abstract [en]

A physically based model is used to describe the microstructural evolution of Nb microalloyed steels during hot rolling. The model is based on a physical description of dislocation density evolution, where the generation and recovery of dislocations determines the flow stress and also the driving force for recrystallization. In the model, abnormally growing subgrains are assumed to be the nuclei of recrystallized grains and recrystallization starts when the subgrains reach a critical size and configuration. The model is used to predict the flow stress during rolling in SSAB Tunnplåt’s hot strip mill. The predicted flow stress in each stand was compared to the stresses calculated by a friction-hill roll-force model. Good fit is obtained between the predicted values by the microstructure model and the measured mill data, with an agreement generally within the interval ±15%.

Place, publisher, year, edition, pages
2007. Vol. 558-559, no 2, p. 1127-1132
Keywords [en]
Modeling, Recrystallization, Hot rolling
National Category
Materials Engineering
Research subject
Stålformning och ytteknik, Modellering av mikrostrukturutvecklingen hos mikrolegerade stål under varmdeformation
Identifiers
URN: urn:nbn:se:du-3072OAI: oai:dalea.du.se:3072DiVA, id: diva2:519900
Conference
3rd International Conference on Recrystallization and Grain Growth, ReX GG III; Jeju Island; South Korea; 10 -15 June 2007
Available from: 2008-01-25 Created: 2008-01-25 Last updated: 2017-12-07Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
  • html
  • text
  • asciidoc
  • rtf