Evolution of Austenite Microstructure and Precipitation State during Hot Rolling of a Nb-Microalloyed Steel
Hot torsion tests were used to simulate hot rolling of a Nb-microalloyed steel. Subsequent graphic representation of Mean Flow Stress (MFS) versus the inverse of absolute temperature for each pass allowed to know the critical rolling temperatures (Tnr Ar3, Ar1,)) and residual stress accumulated in a...
| Autores: | , , |
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| Formato: | artículo |
| Fecha de publicación: | 2003 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/56220 |
| Acesso em linha: | http://hdl.handle.net/10261/56220 |
| Access Level: | acceso abierto |
| Palavra-chave: | Microalloyed steel Hot rolling simulation Recrystallization Precipitation |
| Resumo: | Hot torsion tests were used to simulate hot rolling of a Nb-microalloyed steel. Subsequent graphic representation of Mean Flow Stress (MFS) versus the inverse of absolute temperature for each pass allowed to know the critical rolling temperatures (Tnr Ar3, Ar1,)) and residual stress accumulated in austenite just before austenite to ferrite phase transformation. It has been found that, as successive rolling passes are applied at temperatures below Tnr, mean precipitate size decreases as a result of deformation applied and hardening by incomplete recrystallization of austenite. |
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