Effect of step quenching heat treatments on the kinetics of ferrite formation and quenching & partitioning modeling for a commercial C-Mn-Si steel.
Nenhuma Miniatura disponível
Data
2022
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
Aiming to meet current demands from the automotive industry, a third generation of advanced
high strength steel (AHSS) has been developed as an alternative to previous generations. Different
alloys and innovative processes have been deeply studied as, for example, quenching and partitioning
(Q&P). The published papers highlight that the best heat treatment parameters for a satisfactory
Q&P execution are strongly dependent on the austenite conditioning and they can be optimized if
thermodynamic and kinetics calculations are performed. In this context, this work evaluated the effect
of step quenching (SQ) heat treatments on the kinetics of ferrite formation and Q&P modeling for
a commercial C-Mn-Si steel, predicting the microstructural evolution and the final phase fractions
as a function of the heat treatment parameters. The JMAK model was optimally fitted to the ferrite
fraction, as well as to the microhardness data. The kinetics characterization and the thermodynamic
modeling showed that the combination of SQ and Q&P can provide a high retained austenite fraction
in a multiphase microstructure. As a conclusion, it is possible to state that a well-planned SQ heat
treatment followed by an optimized Q&P cycle has the potential to generate an advanced steel with
a final microstructure assisted by the TRIP effect.
Descrição
Palavras-chave
Advanced high strength steel, Thermodynamics simulation
Citação
MAGALHÃES, C. H. X. M.; CAMPOS, P. H. K.; FARIA, G. L. de. Effect of step quenching heat treatments on the kinetics of ferrite formation and quenching & partitioning modeling for a commercial C-Mn-Si steel. Materials Research, v. 25, 2022. Disponível em: <https://www.scielo.br/j/mr/a/xMrbMZjqsLMk4CDCP9zXDVk/abstract/?format=html&lang=en>. Acesso em: 29 abr. 2022.