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Deformation behavior of a Nb-Ti-V microalloyed steel to achieve the HSLA X80 grade by simulation with a torsion test and pilot hot rolling mill

Published online by Cambridge University Press:  02 January 2013

D. Berdjane
Affiliation:
Département de Métallurgie et Génie des Matériaux, Université Badji-Mokhtar d’Annaba, BP 12, 23000, Algérie. e-mail: berdjamel@yahoo.fr Unité de Recherche Appliquée en Sidérurgie et Métallurgie (URASM-CSC/Annaba), El-Hadjar/Annaba, 23000, Algérie
M.L. Fares
Affiliation:
Département de Métallurgie et Génie des Matériaux, Laboratoire de Mécanique des Matériaux et de Maintenance Industrielle (LR3MI), Université Badji-Mokhtar d’Annaba, BP 12, 23000, Algérie
M. Baccouche
Affiliation:
Département de Métallurgie et Génie des Matériaux, Laboratoire de Métallurgie physique et matériaux (LM2P), Université Badji-Mokhtar d’Annaba, BP 12, 23000, Algérie
A.N. Lemmoui
Affiliation:
Département de Métallurgie et Génie des Matériaux, Laboratoire de Métallurgie physique et matériaux (LM2P), Université Badji-Mokhtar d’Annaba, BP 12, 23000, Algérie
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Abstract

In the present study, the main objective is to improve the mechanical properties of a high steel HSLA grade such as X80 for welded pipes. A study was conducted to optimise the thermomechanical treatment and to attain the mechanical properties of the X80 grade of HSLA steels. From the same chemical composition of the hot rolled X60 grade Nb-Ti-V microalloyed strip steel, we want to enlarge the production to the superior X80 grade type. Dilatometry tests, hot torsion and hot rolling using a pilot mill allowed the simulation of operating process sequences. The results of the rolling schedules performed in a pilot mill allowed us to analyse the effect of the deformation parameters (temperature conditions and reduction) on the evolution of the final structure and the mechanical properties of the Nb-Ti-V microalloyed steel.

Type
Research Article
Copyright
© EDP Sciences 2013

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