Research Progress in Heat Treatment of Fe-Mn-Al-C System Low-density Steel

被引：0

作者：

Sun J. ^{[1
,2
]}

Huang Z. ^{[1
]}

Li J. ^{[1
]}

Wang P. ^{[1
]}

Zhang X. ^{[1
]}

机构：

[1] School of Metallurgical Engineering, Anhui University of Technology, Anhui, Maanshan

[2] School of Mechanical Engineering, Tongling University, Anhui, Tongling

来源：

Cailiao Daobao/Materials Reports | 2023年 / 37卷 / 14期

基金：

中国国家自然科学基金;

关键词：

Fe-Mn-Al-C; heat treatment; low-density steel; mechanical property; microstructure;

D O I：

10.11896/cldb.22010032

中图分类号：

学科分类号：

摘要：

Under the background of energy saving and environmental protection,steel used in the automotive industry has been continuously upgraded and optimized. As a new generation of advanced steel materials,Fe-Mn-Al-C series low-density steel has attracted more and more attention due to its low density and high strength and toughness. The basic alloying elements in Fe-Mn-Al-C series low-density steel are Fe,Mn,Al,and C,and the basic phase constituents are austenite(γ)and ferrite(α). It also contains κ-carbide,B2,DO3 and β-Mn and other precipitation phases under different processing and heat treatment conditions. According to phase constituents,it can be divided into ferritic low-density steel, austenitic low-density steel,ferritic based low-density steel and austenitic based low-density steel. The heat treatment process plays an important role in regulating the microstructure and precipitation behavior of low-density steel,which can improve the comprehensive mechanical properties of low-density steel. Studies have shown that annealing treatment can effectively eliminate the band-like structure of cold-rolled low-density steel and improve its strength and toughness;while controlling the solid solution and aging treatment processes can control the size,shape,and distribution of the precipitates to obtain high-strength plastic products with low density steel,so heat treatment is an effective way to optimize the overall properties of low-density steel. In this paper,the composition design and phase characteristics of Fe-Mn-Al-C series low-density steel are introduced. The influence of heat treatment process on microstructure and mechanical properties of the steel was reviewed,the heat treatment methods such as annealing treatment,solution treatment and aging treatment are explained. Based on the research status of Fe-Mn-Al-C series low-density steel,the future research direction of this steel is prospected,which can serve as reference for further research. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.

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