Al元素对Fe-Mn-Al-C系低密度钢的影响特性综述

Effect of Al on properties of Fe-Mn-Al-C low density steel

随着"节能、减排、环保"意识的逐渐增强,实现汽车轻量化已成为汽车用钢的主要发展目标之一,其中,Fe-Mn-Al-C系低密度钢加入Al后具有良好的力学性能及应用性能,受到广大研究者的青睐。因此,从密度、弹性模量、析出物、层错能、力学性能及应用性能等方面总结Al元素对Fe-Mn-Al-C系低密度钢的影响规律。重点分析Fe-Mn-Al-C系低密度钢中Al含量对κ-碳化物、Fe-Al金属间化合物及β-Mn等析出相的影响,以及进一步对力学性能、冲击韧性的影响,并说明可通过控制Al含量改善Fe-Mn-Al-C系低密度钢的抗氧化性、耐蚀性、焊接性、成形性等性能。最后,结合目前国内外学者对Fe-Mn-Al-C系低密度钢的最新研究成果,对Fe-Mn-Al-C系低密度钢研究过程中存在的问题进行总结,展望其未来的发展趋势。

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 asκ-carbide,Fe-Al intermetallic compound andβ-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.