Influence of hot forging parameters on a low carbon continuous cooling bainitic steel microstructure
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/215100 |
Resumo: | Thermomechanical processing of low carbon bainitic steels is used to obtain a bainitic microstructure with good strength and toughness by continuous cooling after forging without the need of further heat treating, hence reducing manufacturing costs. However, hot forging parameters can significantly influence the microstructure in the forged material. A series of heat treating and forging experiments was carried out to analyze the effect of austenitizing time and temperature on the grain growth and the effect of forging temperature on the Prior Austenite Grain Size (PAGS) and continuously cooled microstructure. The forged microstructures were characterized by optical microscopy, microhardness tests, and X-ray diffraction. The results indicate that at 1200 ◦C austenitizing temperature abnormal grain growth takes place. Forging temperature significantly affects the PAGS and the subsequently formed microstructure. At high forging temperature (1200 ◦C), an almost fully bainitic microstructure was obtained. As the forging temperature was reduced to 1100 and 1000 ◦C, the PAGS refined, while the polygonal ferrite faction increased and the amount of retained austenite decreased. Further evaluations showed that a decrease in the forging temperature results in a higher carbon concentration in solution in the retained austenite leading to a stabilization effect. |
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Silveira, Antonio Carlos de FigueiredoBevilaqua, William LemosDias, Vinicius WaechterCastro, Pedro José deEpp, JérémyRocha, Alexandre da Silva2020-11-18T04:09:53Z20202075-4701http://hdl.handle.net/10183/215100001118125Thermomechanical processing of low carbon bainitic steels is used to obtain a bainitic microstructure with good strength and toughness by continuous cooling after forging without the need of further heat treating, hence reducing manufacturing costs. However, hot forging parameters can significantly influence the microstructure in the forged material. A series of heat treating and forging experiments was carried out to analyze the effect of austenitizing time and temperature on the grain growth and the effect of forging temperature on the Prior Austenite Grain Size (PAGS) and continuously cooled microstructure. The forged microstructures were characterized by optical microscopy, microhardness tests, and X-ray diffraction. The results indicate that at 1200 ◦C austenitizing temperature abnormal grain growth takes place. Forging temperature significantly affects the PAGS and the subsequently formed microstructure. At high forging temperature (1200 ◦C), an almost fully bainitic microstructure was obtained. As the forging temperature was reduced to 1100 and 1000 ◦C, the PAGS refined, while the polygonal ferrite faction increased and the amount of retained austenite decreased. Further evaluations showed that a decrease in the forging temperature results in a higher carbon concentration in solution in the retained austenite leading to a stabilization effect.application/pdfengMetals. Basel, Suíça. Vol. 10, no. 5 (May 2020), Art. 601, 11 p.ForjamentoFerroMicroestruturaTransformação mecânicaThermomechanical processingGrain growthForgingRetained austeniteBainitic microstructureInfluence of hot forging parameters on a low carbon continuous cooling bainitic steel microstructureEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001118125.pdf.txt001118125.pdf.txtExtracted Texttext/plain46153http://www.lume.ufrgs.br/bitstream/10183/215100/2/001118125.pdf.txt76d5fb845b5235a80c3633a9ed7fd5b8MD52ORIGINAL001118125.pdfTexto completo (inglês)application/pdf7457813http://www.lume.ufrgs.br/bitstream/10183/215100/1/001118125.pdfc2ab314f49c7c716a0085e3e2905326fMD5110183/2151002021-03-09 04:49:36.658167oai:www.lume.ufrgs.br:10183/215100Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-03-09T07:49:36Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Influence of hot forging parameters on a low carbon continuous cooling bainitic steel microstructure |
title |
Influence of hot forging parameters on a low carbon continuous cooling bainitic steel microstructure |
spellingShingle |
Influence of hot forging parameters on a low carbon continuous cooling bainitic steel microstructure Silveira, Antonio Carlos de Figueiredo Forjamento Ferro Microestrutura Transformação mecânica Thermomechanical processing Grain growth Forging Retained austenite Bainitic microstructure |
title_short |
Influence of hot forging parameters on a low carbon continuous cooling bainitic steel microstructure |
title_full |
Influence of hot forging parameters on a low carbon continuous cooling bainitic steel microstructure |
title_fullStr |
Influence of hot forging parameters on a low carbon continuous cooling bainitic steel microstructure |
title_full_unstemmed |
Influence of hot forging parameters on a low carbon continuous cooling bainitic steel microstructure |
title_sort |
Influence of hot forging parameters on a low carbon continuous cooling bainitic steel microstructure |
author |
Silveira, Antonio Carlos de Figueiredo |
author_facet |
Silveira, Antonio Carlos de Figueiredo Bevilaqua, William Lemos Dias, Vinicius Waechter Castro, Pedro José de Epp, Jérémy Rocha, Alexandre da Silva |
author_role |
author |
author2 |
Bevilaqua, William Lemos Dias, Vinicius Waechter Castro, Pedro José de Epp, Jérémy Rocha, Alexandre da Silva |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Silveira, Antonio Carlos de Figueiredo Bevilaqua, William Lemos Dias, Vinicius Waechter Castro, Pedro José de Epp, Jérémy Rocha, Alexandre da Silva |
dc.subject.por.fl_str_mv |
Forjamento Ferro Microestrutura Transformação mecânica |
topic |
Forjamento Ferro Microestrutura Transformação mecânica Thermomechanical processing Grain growth Forging Retained austenite Bainitic microstructure |
dc.subject.eng.fl_str_mv |
Thermomechanical processing Grain growth Forging Retained austenite Bainitic microstructure |
description |
Thermomechanical processing of low carbon bainitic steels is used to obtain a bainitic microstructure with good strength and toughness by continuous cooling after forging without the need of further heat treating, hence reducing manufacturing costs. However, hot forging parameters can significantly influence the microstructure in the forged material. A series of heat treating and forging experiments was carried out to analyze the effect of austenitizing time and temperature on the grain growth and the effect of forging temperature on the Prior Austenite Grain Size (PAGS) and continuously cooled microstructure. The forged microstructures were characterized by optical microscopy, microhardness tests, and X-ray diffraction. The results indicate that at 1200 ◦C austenitizing temperature abnormal grain growth takes place. Forging temperature significantly affects the PAGS and the subsequently formed microstructure. At high forging temperature (1200 ◦C), an almost fully bainitic microstructure was obtained. As the forging temperature was reduced to 1100 and 1000 ◦C, the PAGS refined, while the polygonal ferrite faction increased and the amount of retained austenite decreased. Further evaluations showed that a decrease in the forging temperature results in a higher carbon concentration in solution in the retained austenite leading to a stabilization effect. |
publishDate |
2020 |
dc.date.accessioned.fl_str_mv |
2020-11-18T04:09:53Z |
dc.date.issued.fl_str_mv |
2020 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/215100 |
dc.identifier.issn.pt_BR.fl_str_mv |
2075-4701 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001118125 |
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2075-4701 001118125 |
url |
http://hdl.handle.net/10183/215100 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Metals. Basel, Suíça. Vol. 10, no. 5 (May 2020), Art. 601, 11 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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UFRGS |
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Repositório Institucional da UFRGS |
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Repositório Institucional da UFRGS |
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