Abstract：With the increasing awareness of "energy saving, emission reduction and environmental protection", the lightweighting of automobiles has become one of the main development goals of automotive steels. The addition of Al to Fe-Mn-Al-C low density steels has good mechanical and application properties, which is favored by researchers. In this paper, the influence of Al elements on Fe-Mn-Al-C low-density steels is summarized in terms of density, elasticity modulus, precipitates, stacking fault energy, mechanical properties and application properties. The influence of Al content on precipitation phases such as κ-carbide, Fe-Al intermetallic compound and β-Mn in Fe-Mn-Al-C low-density steels, which in turn affects their mechanical properties and impact toughness is analyzed, and the properties of Fe-Mn-Al-C low-density steels such as oxidation resistance, corrosion resistance, weldability and formability can be improved by controlling Al content. Finally, combined with the latest research results of Fe-Mn-Al-C low-density steels by domestic and foreign scholars, the problems existing in the researches of Fe-Mn-Al-C low-density steels are summarized, and the future development trend of Fe-Mn-Al-C low-density steels is prospected.
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2022, Vol. 32 
