Heat Treatment of Metals ›› 2022, Vol. 47 ›› Issue (3): 34-38.DOI: 10.13251/j.issn.0254-6051.2022.03.006

• PROCESS RESEARCH • Previous Articles     Next Articles

Effect of solution treatment and aging on microstructure and hardness of Fe-Mn-Al-C light weight steel

Sun Jian1,2, Huang Zhenyi1, Li Jinghui1, Wang Ping1   

  1. 1. School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan Anhui 243002, China;
    2. School of Mechanical Engineering, Tongling University, Tongling Anhui 244061, China
  • Received:2021-10-27 Revised:2021-12-28 Online:2022-03-25 Published:2022-04-22

Abstract: Microstructure and hardness of the Fe-Mn-Al-C light weight steel after solution and aging treatment were characterized by XRD, OM, SEM and Brinell hardness tester. The results show that, with the increase of solution treatment temperature, the austenite grain size in the tested steel increases gradually, and the grain size is 50-200 μm at 1050 ℃. With the increase of aging temperature, the austenite grain growth is not obvious, and the second phases such as κ-carbide and VC appear in the austenite matrix. With the increase of aging temperature, the morphologies of the second phase in the tested steel gradually change from sporadic distribution to flake aggregation, and then to chain distribution in the austenite matrix. The hardness of the tested steel decreases and increases with the increase of solution treatment temperature and aging temperature, respectively.

Key words: light weight steel, solution treatment, aging, microstructure, hardness

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