0.1C–11Mn medium manganese steel treated by quenching and tempering process. Issue 17 (22nd November 2022)

• Record Type: Journal Article
• Authors: Zhao, Yan; Yang, Dengcui; Yin, Xiandong; Zhiying, ; , Mo; Wang, Shuai; Zhao, WeiYan; Chu, Xiaohong; Zhao, Zhengzhi
• Is Part Of: Materials science and technology. Volume 38:Issue 17(2022)
• Page Start: 1490
• Page End: 1500
• Publication Date: 2022-11-22
• Subjects: Medium manganese steel -- Q–T process -- tempered martensite -- austenite stability -- dislocation strengthening; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2022.2087027
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : In this work, we developed a third-generation automobile steel with high strength and elongation of 0.1C–11Mn medium manganese steel using a simple quenching and low-temperature tempering heat treatment procedure. At different austenitisation temperatures, the microstructure and mechanical properties of manganese steel were examined. The microstructure included tempered martensite (TM), austenite, and ultra-fine-grained ferrite. The steel achieved the highest strength and elongation of 39.1GPa·% when it was quenched at 630°C for 10 min and tempered at 450°C for 5 min. In conclusion, dislocation strengthening was the primary factor to increase yield strength. At 630°C, the steel achieved its best mechanical properties because of a higher austenite stability, work-hardening capability, and synergistic impact of ultra-fine-grained ferrite and martensite.