Characterization and Prediction of Continuous Cooling Transformations in Rail Steels

Detalhes bibliográficos
Autor(a) principal: Rodrigues,Karine Fernandes
Data de Publicação: 2021
Outros Autores: Faria,Geraldo Lúcio de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392021000500208
Resumo: Abstract This paper presents the characterization of austenite to pearlite transformation in rail steels (premium and standard) using dilatometry. The critical transformation temperatures were measured as a cooling rate function and the obtained microstructures were qualitatively and quantitatively characterized. Aiming to study the transformation kinetics, three equations proposed by technical literature were evaluated in order to predict the transformation evolution. Experimental and calculated CCT diagrams were compared. It was concluded once the kinetics of phase transformation in rail steels is well characterized, it can be used as reference to enable suitable heat treatment to obtain pearlitic microstructures for the standard steel as refined as those of premium. The minor prior austenite grain size of the standard steel favoured the pearlite nucleation, however its highest Mn, Nb and Si contents delayed the growth stage. All equations evaluated in order to predict the kinetics of austenite to pearlite transformation under continuous cooling were satisfactory.
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spelling Characterization and Prediction of Continuous Cooling Transformations in Rail SteelsRail steelContinuous cooling transformationPhase transformation predictionDilatometryAbstract This paper presents the characterization of austenite to pearlite transformation in rail steels (premium and standard) using dilatometry. The critical transformation temperatures were measured as a cooling rate function and the obtained microstructures were qualitatively and quantitatively characterized. Aiming to study the transformation kinetics, three equations proposed by technical literature were evaluated in order to predict the transformation evolution. Experimental and calculated CCT diagrams were compared. It was concluded once the kinetics of phase transformation in rail steels is well characterized, it can be used as reference to enable suitable heat treatment to obtain pearlitic microstructures for the standard steel as refined as those of premium. The minor prior austenite grain size of the standard steel favoured the pearlite nucleation, however its highest Mn, Nb and Si contents delayed the growth stage. All equations evaluated in order to predict the kinetics of austenite to pearlite transformation under continuous cooling were satisfactory.ABM, ABC, ABPol2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392021000500208Materials Research v.24 n.5 2021reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2020-0519info:eu-repo/semantics/openAccessRodrigues,Karine FernandesFaria,Geraldo Lúcio deeng2021-07-21T00:00:00Zoai:scielo:S1516-14392021000500208Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2021-07-21T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Characterization and Prediction of Continuous Cooling Transformations in Rail Steels
title Characterization and Prediction of Continuous Cooling Transformations in Rail Steels
spellingShingle Characterization and Prediction of Continuous Cooling Transformations in Rail Steels
Rodrigues,Karine Fernandes
Rail steel
Continuous cooling transformation
Phase transformation prediction
Dilatometry
title_short Characterization and Prediction of Continuous Cooling Transformations in Rail Steels
title_full Characterization and Prediction of Continuous Cooling Transformations in Rail Steels
title_fullStr Characterization and Prediction of Continuous Cooling Transformations in Rail Steels
title_full_unstemmed Characterization and Prediction of Continuous Cooling Transformations in Rail Steels
title_sort Characterization and Prediction of Continuous Cooling Transformations in Rail Steels
author Rodrigues,Karine Fernandes
author_facet Rodrigues,Karine Fernandes
Faria,Geraldo Lúcio de
author_role author
author2 Faria,Geraldo Lúcio de
author2_role author
dc.contributor.author.fl_str_mv Rodrigues,Karine Fernandes
Faria,Geraldo Lúcio de
dc.subject.por.fl_str_mv Rail steel
Continuous cooling transformation
Phase transformation prediction
Dilatometry
topic Rail steel
Continuous cooling transformation
Phase transformation prediction
Dilatometry
description Abstract This paper presents the characterization of austenite to pearlite transformation in rail steels (premium and standard) using dilatometry. The critical transformation temperatures were measured as a cooling rate function and the obtained microstructures were qualitatively and quantitatively characterized. Aiming to study the transformation kinetics, three equations proposed by technical literature were evaluated in order to predict the transformation evolution. Experimental and calculated CCT diagrams were compared. It was concluded once the kinetics of phase transformation in rail steels is well characterized, it can be used as reference to enable suitable heat treatment to obtain pearlitic microstructures for the standard steel as refined as those of premium. The minor prior austenite grain size of the standard steel favoured the pearlite nucleation, however its highest Mn, Nb and Si contents delayed the growth stage. All equations evaluated in order to predict the kinetics of austenite to pearlite transformation under continuous cooling were satisfactory.
publishDate 2021
dc.date.none.fl_str_mv 2021-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392021000500208
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392021000500208
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1980-5373-mr-2020-0519
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.24 n.5 2021
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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