A review of effect of Cr element on high Al Fe-Mn-Al-C low density steel

doi:10.13251/j.issn.0254-6051.2023.10.037

Abstract

Abstract: With the needs of energy conservation, environmental protection and economy, the lightweight and high toughness have become the main development goals of the automotive steel industry. Among different types of series steel, Fe-Mn-Al-C austenitic steel is favored because of its excellent comprehensive properties such as high specific strength and high product of strength and elongation. With the addition of weight reduction element Al, the promoted formation of κ-carbide deteriorates the properties of the Fe-Mn-Al-C steel seriously, thus reducing or refining the κ-carbide is an effective way to improve the performance of the high-aluminum Fe-Mn-Al-C steel. Therefore, from the point of view of composition design, effect of Cr element on the Fe-Mn-Al-C low density steel in terms of phase composition, κ-carbide, mechanical properties, deformation mechanism and stacking fault energy were summarized, and the effect of Cr content on the κ-carbide mechanism was emphatically analyzed, then explaining that the performance of the Fe-Mn-Al-C steel with high aluminum could be improved by adding Cr element. Finally, combining with the latest research results, the development trend of Fe-Mn-Al-C steel in the future is prospected.

Key words: Fe-Mn-Al-C light weight steel, Cr element, κ-carbide, tensile properties, influencing factor, stacking fault energy

CLC Number:

TG142.1

Zhao Kang, Wu Zhifang, Sun Ting, Wang Maoqiu, Shi Jie. A review of effect of Cr element on high Al Fe-Mn-Al-C low density steel[J]. Heat Treatment of Metals, 2023, 48(10): 239-246.

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