Effect of Cr Additions on Ferrite Recrystallization and Austenite Formation in Dual-Phase Steels Heat Treated in the Intercritical Temperature Range

AUTOR(ES)

Silva Filho, José Francisco da, Oliveira, Carlos Augusto Silva de, Fonstein, Nina, Girina, Olga, Miranda, Fabiano José Fabri, Drumond, Juliovany, Serafim, Eder Adolfo, Afonso, Conrado Ramos Moreira

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

23/02/2016

RESUMO

An 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.

Documentos Relacionados

• Study of Pipeline Steels with Acicular Ferrite Microstructure and Ferrite-bainite Dual-phase Microstructure
• Effect of initial microstructures on the properties of Ferrite-Martensite Dual-Phase pipeline steels with Strain-Based design
• Study on microstructures and work hardening behavior of ferrite-martensite dual-phase steels with high-content martensite
• Intercritical Heat Treatment Temperature Dependence of Mechanical Properties and Corrosion Resistance of Dual Phase Steel
• Soldabilidade dos aços DUAL-PHASE 600 e 800 via processo de soldagem a pontos média freqüência corrente contínua (MFDC) e corrente alternada (AC)