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Effect of thermo-mechanical parameters on microstructure and mechanical properties of microalloyed steels

Ebrahimi G. R., Javdani Mousa et Arabshahi H.. (2010). Effect of thermo-mechanical parameters on microstructure and mechanical properties of microalloyed steels. Brazilian Journal of Physics, 40, (4), p. 454-458.

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In this work the effects of controlled rolling parameters and adding of Niobium have been studied. In this order two steel grades with and without Niobium are planed and after steelmaking and continuous casting, rolling process are done. Then, laboratory investigations such as microstructure, mechanical properties and grain size analysis were performed Tensile and Charpy impact tests specimens were machined out of the central part of the rolled billets. The microstructure of the specimens was examined for each experimental condition using optical microscopy. The results indicate that increasing the reheating temperature above the dissolution temperature of Nb (C, N) improved the impact energy values. By increasing the cooling rate from 0.5 to 1.5 ºC/s both tensile strength and impact toughness were improved. High elongation percent was also observed on samples reheated at higher temperature and/or cooled with the higher cooling rates. The obtained mechanical properties were related to the characteristics of microstructural components including acicular ferrite, retained austenite, pearlite and ferrite.

Type de document:Article publié dans une revue avec comité d'évaluation
Pages:p. 454-458
Version évaluée par les pairs:Oui
Identifiant unique:10.1590/S0103-97332010000400017
Sujets:Sciences naturelles et génie
Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Sciences naturelles et génie > Sciences appliquées
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Mots-clés:Microalloyed steel, hot rolling, Niobium, microstructure, mechanical properties, acier microallié, laminage à chaud, microstructure, propriétés mécaniques
Déposé le:01 mars 2021 21:53
Dernière modification:01 mars 2021 21:53
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