Produção Nacional
Revisado por pares
Effect of Cr Additions on Ferrite Recrystallization and Austenite Formation in Dual-Phase Steels Heat Treated in the Intercritical Temperature Range
2016; Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímer; Volume: 19; Issue: 1 Linguagem: Inglês
10.1590/1980-5373-mr-2015-0641
ISSN1980-5373
AutoresJosé Francisco da Silva Filho, Carlos Augusto Silva de Oliveira, Nina Fonstein, O. Girina, Fabiano José Fabri Miranda, Juliovany Drumond, Eder Adolfo Serafim, Conrado Ramos Moreira Afonso,
Tópico(s)Metallurgy and Material Forming
ResumoAn experimental investigation was conducted using laboratory-processed low carbon Mn-Mo-Nb-Ti-B dual phase steel with additions of 0.2Cr or 0.6%Cr. This study investigates the effect of Cr additions on ferrite recrystallization and austenite formation during continuous annealing in the intercritical temperature range. It was found that moderate additions of Cr (0.2%) accelerates the ferrite recrystallization (nucleation and growth) resulting in coarse ferrite grains. An increase in Cr content up to 0.6% also accelerates the ferrite recrystallization which in addition to the presence of Cr-rich carbides facilitates the austenitization predominantly through the nucleation process resulted in finer austenite grains. Thereby, the higher Cr content increases the volume of homogenized and refined martensite in the final quenched structure.
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