Yu, C.; Wang, H.; Zhang, Y.; Li, Y.; Kang, J.; Chang, Z. Effects of Quenching Temperature on the Microstructure and Mechanical Properties of a Strip-Cast Medium-Mn Steel Processed by Quenching and Partitioning. Metals2023, 13, 1772.
Yu, C.; Wang, H.; Zhang, Y.; Li, Y.; Kang, J.; Chang, Z. Effects of Quenching Temperature on the Microstructure and Mechanical Properties of a Strip-Cast Medium-Mn Steel Processed by Quenching and Partitioning. Metals 2023, 13, 1772.
Yu, C.; Wang, H.; Zhang, Y.; Li, Y.; Kang, J.; Chang, Z. Effects of Quenching Temperature on the Microstructure and Mechanical Properties of a Strip-Cast Medium-Mn Steel Processed by Quenching and Partitioning. Metals2023, 13, 1772.
Yu, C.; Wang, H.; Zhang, Y.; Li, Y.; Kang, J.; Chang, Z. Effects of Quenching Temperature on the Microstructure and Mechanical Properties of a Strip-Cast Medium-Mn Steel Processed by Quenching and Partitioning. Metals 2023, 13, 1772.
Abstract
A medium-Mn steel was processed by a route involving twin-roll strip casting, hot-rolling and quenching and partitioning with different quenching temperatures. The effects of quenching temperature on the microstructure and mechanical properties were studied. It was found primary martensite and retained austenite (RA) were obtained at the quenching temperature of 140–180 °C, while primary martensite, RA and secondary martensite were obtained when the quenching temperature was 220–300 °C. With increase in quenching temperature from 140 to 260 and to 300 °C, RA fraction first increased from 15.4% to 31.8% and then decreased to 16.6%. The sample at quenching temperature of 220 °C yielded the mechanical properties with yield strength of 992 MPa, tensile strength of 1159 MPa and total elongation of 20.4%. The superior mechanical properties were achieved by an optimum combination of high RA fraction (26.5 vol%), appropriate mechanical stability of RA and a small amount of secondary martensite.
Engineering, Metallurgy and Metallurgical Engineering
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