Heat Treatment of Metals ›› 2025, Vol. 50 ›› Issue (3): 244-249.DOI: 10.13251/j.issn.0254-6051.2025.03.039

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Research status and prospects of medium manganese steels for automobiles

Qi Jiasheng1, Xu Wenquan2   

  1. 1. Nanjing University of Science and Technology Zijin College, Nanjing Jiangsu 210046, China;
    2. School of Electronic Engineering and Intelligent Manufacturing, Anqing Normal University, Anqing Anhui 246001, China
  • Received:2024-09-15 Revised:2025-01-11 Online:2025-03-25 Published:2025-05-14

Abstract: Research status of medium-Mn steels at home and abroad were reviewed from three aspects: chemical composition, strengthening and toughening mechanism, and heat treatment processes. The effects of elements such as Mn, C, and Al on the microstructure and properties of medium-Mn steels were analyzed and summarized. Regarding the strengthening and toughening mechanism during the deformation of medium-Mn steels, the transformation-induced plasticity (TRIP) effect and its influencing factors were emphasized. Considering that the microstructure and properties of medium-Mn steels were closely related to heat treatment processes, the heat treatment processes such as austenite reverse transformation (ART), quenching and tempering (Q&T), quenching and partitioning (Q&P), and their effects on the microstructure and properties were introduced in detail. Finally, the future research directions of medium-Mn steels was prospected.

Key words: medium manganese steel, strengthening and toughening mechanism, TRIP effect, heat treatment, microstructure, mechanical properties

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