Título

TAILORING PHASE TRANSFORMATIONS IN SAE 9254 STEEL: A DILATOMETRY-BASED STUDY ON AUSTENITIZATION, QUENCHING, AND CARBON PARTITIONING PROCESSES

TAILORING PHASE TRANSFORMATIONS IN SAE 9254 STEEL: A DILATOMETRY-BASED STUDY ON AUSTENITIZATION, QUENCHING, AND CARBON PARTITIONING PROCESSES

Autoria

Masoumi, Mohammad; Centeno, Dany; Tressia, Gustavo; Carvalho, Felipe Moreno; Cezario, Fabiano Eduardo Marques

DOI

10.5151/2594-5327-39937

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Resumo

This study investigates the phase transformations and microstructural development of SAE 9254 steel subjected to various heat treatments aimed at achieving a combination of bainitic, martensitic, and retained austenitic phases. The critical austenitization and quenching temperatures, along with the holding times, were determined using a dilatometer to observe the steel's phase transformation behavior. An austenitization temperature of 850°C with a holding time of 180 seconds and a quenching temperature of 220°C were established. Two isothermal holding temperatures at 325°C and 375°C, with holding times of 30 and 15 minutes respectively, were chosen for the partitioning process after quenching.

 

This study investigates the phase transformations and microstructural development of SAE 9254 steel subjected to various heat treatments aimed at achieving a combination of bainitic, martensitic, and retained austenitic phases. The critical austenitization and quenching temperatures, along with the holding times, were determined using a dilatometer to observe the steel's phase transformation behavior. An austenitization temperature of 850°C with a holding time of 180 seconds and a quenching temperature of 220°C were established. Two isothermal holding temperatures at 325°C and 375°C, with holding times of 30 and 15 minutes respectively, were chosen for the partitioning process after quenching.

Palavras-chave

AISI 9254, Phase transformation, XRD, retained austennite

AISI 9254, Phase transformation, XRD, retained austennite