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Hot deformation behavior of a ferritic stainless steel stabilized with Nb during hot rolling simulation at different temperature ranges

Published online by Cambridge University Press:  19 February 2016

Flávia Vieira Braga ,
Diana Pérez Escobar Open the ORCID record for Diana Pérez Escobar [Opens in a new window] ,
Nilton José Lucinda de Oliveira  and
Margareth Spangler Andrade
Flávia Vieira Braga*
Affiliation:
REDEMAT - Rede Temática em Engenharia de Materiais, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais 35400-000, Brazil
Diana Pérez Escobar
Affiliation:
SENAI Institute of Innovation in Metallurgy and Special Alloys, Center for Innovation and Technology SENAI FIEMG - Campus CETEC, Belo Horizonte, Minas Gerais 31035-536, Brazil
Nilton José Lucinda de Oliveira
Affiliation:
SENAI Institute of Innovation in Metallurgy and Special Alloys, Center for Innovation and Technology SENAI FIEMG - Campus CETEC, Belo Horizonte, Minas Gerais 31035-536, Brazil
Margareth Spangler Andrade
Affiliation:
SENAI Institute of Innovation in Metallurgy and Special Alloys, Center for Innovation and Technology SENAI FIEMG - Campus CETEC, Belo Horizonte, Minas Gerais 31035-536, Brazil
*
a) Address all correspondence to this author. e-mail: flaviafisica@gmail.com
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Abstract

The aim of the present work was to study the effect of the finishing rolling temperature on interpass recrystallization promotion of an Nb-stabilized AISI 430 steel, via torsion tests simulation of a Steckel mill. The occurrence of interpass recrystallization was investigated by interrupting the tests before predetermined passes and analyzing the samples via electron backscatter diffraction (EBSD). The results revealed that interpass recrystallization can be promoted by decreasing the initial hot rolling temperature; which results in increased strain hardening during the passes and therefore, increased stored energy for recrystallization. The torsion test results concurred with those obtained by EBSD measurements. Furthermore, an optimum temperature range of 900–840 °C was found to promote interpass recrystallization during hot rolling.

Keywords

EBSDsteeltexturestress/strain relationship
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 5 , 14 March 2016 , pp. 635 - 645
Copyright
Copyright © Materials Research Society 2016 

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References

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