工程科学学报.第42卷.第7期：814-828.2020年7月 Chinese Journal of Engineering,Vol.42,No.7:814-828,July 2020 https://doi.org/10.13374/j.issn2095-9389.2019.08.27.002;http://cje.ustb.edu.cn Fe-Mn-Al-C系中锰钢的研究现状与发展前景 宋仁伯四，霍巍丰，周乃鹏，李佳佳，张哲睿，王永金 北京科技大学材料科学与工程学院，北京100083 ☒通信作者，E-mail:songrb@mater..ustb.edu.cn 摘要随着汽车保有量的提高，能源消耗和环境问题对汽车用钢提出了轻量化的要求.目前正在发展的第三代汽车用钢的 研究思路是将加入轻量元素以“轻”和增强增塑以“薄”相结合.F℃-M-A-C系中锰钢作为第三代汽车用钢的主要组成部 分，是当今的研究热点之一.本文总结了近些年国内外F©-Mn-A-C系中锰钢的研究文献，从生产成本、力学性能等方面介 绍了Fε-M-A-C系中锰钢的优势.从成分设计、工艺设计、组织特征、变形及断裂机制等多个方面出发，对文献进行分析， 总结出了合金成分、工艺路线和组织特征对性能的影响规律.阐述了奥氏体层错能及其稳定性对中锰钢变形机制，尤其是相 变诱导塑性(TRIP效应)的影响规律.最后对目前Fe-M-A-C系中锰钢研究过程中存在的争议问题进行了总结，展望了未 来的发展趋势，以期为中锰钢的后续研究和实际生产提供参考. 关键词Fe-Mn-AlC:中锰钢：强塑积：临界退火；TRIP效应；奥氏体稳定性 分类号TG142.71 Research progress and prospect of Fe-Mn-Al-C medium Mn steels SONG Ren-bo,HUO Wei-feng.ZHOU Nai-peng,LI Jia-jia,ZHANG Zhe-rui,WANG Yong-jin School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:songrb@mater.ustb.edu.cn ABSTRACT As vehicle ownership increases,the trend lightweight design puts energy consumption and environmental concerns on automotive steel.The research concept of the third generation of automotive steel currently under development is to combine the addition of lightweight elements with "light"and improve plasticization with "thin".Some of the research hotspots are Fe-Mn-Al-C medium Mn steels as the main component of the third generation of automotive steel.This paper summarized the research literature of Fe-Mn-Al-C steels in recent years in different countries,and discussed the advantages of Fe-Mn-Al-C medium Mn steels in terms of production cost and mechanical properties;the mechanical properties of that is not worse or even better than the second generation of advanced high-strength automotive steel such as TWIP steel can be obtained under the premise of cost savings.The literature was reviewed from the aspects of composition design,process design,microstructure characteristics,deformation and fracture mechanism, and the effect on the efficiency of chemical composition,process route,and microstructure on performance was summarized.It proposed a reasonable range of chemical elements especially Mn and Al,and compared the focus of the two different process routes(Intercritical annealing and quenching Tempering).The deformation mechanism of medium Mn steel,especially transformation-induced plasticity (TRIP)effect,and the stacking fault energy and austenite stability were identified,in particular,the factors affecting the austenite stability such as grains size,grain morphology and chemical elements were described,and the three-stage work hardening behavior that often occurs in Fe-Mn-Al-C steels was explained.Furthermore,the literature proposed suggestions on regulating the organization of Fe-Mn-Al-C steels by studying the fracture mechanism of materials.Typically the initiation of cleavage cracks is linked to the process of coarse 8-ferrite and K*phase.Finally,this paper summarized the controversial issues in Fe-Mn-Al-C medium Mn steels research and 收稿日期：2019-08-27 基金项目：中国博士后科学基金资助项目(2019M650482):教育部中央高校基金资助项目(FRF-TP.18-039A1,FRF-DRY-19-013)Fe−Mn−Al−C 系中锰钢的研究现状与发展前景 宋仁伯苣，霍巍丰，周乃鹏，李佳佳，张哲睿，王永金 北京科技大学材料科学与工程学院，北京 100083 苣通信作者，E-mail: songrb@mater.ustb.edu.cn 摘    要    随着汽车保有量的提高，能源消耗和环境问题对汽车用钢提出了轻量化的要求. 目前正在发展的第三代汽车用钢的 研究思路是将加入轻量元素以“轻”和增强增塑以“薄”相结合. Fe−Mn−Al−C 系中锰钢作为第三代汽车用钢的主要组成部 分，是当今的研究热点之一. 本文总结了近些年国内外 Fe−Mn−Al−C 系中锰钢的研究文献，从生产成本、力学性能等方面介 绍了 Fe−Mn−Al−C 系中锰钢的优势. 从成分设计、工艺设计、组织特征、变形及断裂机制等多个方面出发，对文献进行分析， 总结出了合金成分、工艺路线和组织特征对性能的影响规律. 阐述了奥氏体层错能及其稳定性对中锰钢变形机制，尤其是相 变诱导塑性（TRIP 效应）的影响规律. 最后对目前 Fe−Mn−Al−C 系中锰钢研究过程中存在的争议问题进行了总结，展望了未 来的发展趋势，以期为中锰钢的后续研究和实际生产提供参考. 关键词    Fe–Mn–Al–C；中锰钢；强塑积；临界退火；TRIP 效应；奥氏体稳定性 分类号    TG142.71 Research progress and prospect of Fe−Mn−Al−C medium Mn steels SONG Ren-bo苣 ，HUO Wei-feng，ZHOU Nai-peng，LI Jia-jia，ZHANG Zhe-rui，WANG Yong-jin School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 苣 Corresponding author, E-mail: songrb@mater.ustb.edu.cn ABSTRACT    As vehicle ownership increases, the trend lightweight design puts energy consumption and environmental concerns on automotive steel. The research concept of the third generation of automotive steel currently under development is to combine the addition of lightweight elements with “light” and improve plasticization with “thin”. Some of the research hotspots are Fe−Mn−Al−C medium Mn steels as the main component of the third generation of automotive steel. This paper summarized the research literature of Fe−Mn−Al−C steels in recent years in different countries, and discussed the advantages of Fe−Mn−Al−C medium Mn steels in terms of production cost and mechanical properties; the mechanical properties of that is not worse or even better than the second generation of advanced high-strength automotive steel such as TWIP steel can be obtained under the premise of cost savings. The literature was reviewed from the aspects of composition design, process design, microstructure characteristics, deformation and fracture mechanism, and the effect on the efficiency of chemical composition, process route, and microstructure on performance was summarized. It proposed a reasonable range of chemical elements especially Mn and Al, and compared the focus of the two different process routes (Intercritical annealing and quenching + Tempering). The deformation mechanism of medium Mn steel, especially transformation-induced plasticity (TRIP) effect, and the stacking fault energy and austenite stability were identified, in particular, the factors affecting the austenite stability such as grains size, grain morphology and chemical elements were described, and the three-stage work hardening behavior that often occurs in Fe−Mn−Al−C steels was explained. Furthermore, the literature proposed suggestions on regulating the organization of Fe−Mn−Al−C steels by studying the fracture mechanism of materials. Typically the initiation of cleavage cracks is linked to the process of coarse δ-ferrite and κ* phase. Finally, this paper summarized the controversial issues in Fe−Mn−Al−C medium Mn steels research and 收稿日期: 2019−08−27 基金项目: 中国博士后科学基金资助项目（2019M650482）；教育部中央高校基金资助项目（FRF-TP-18-039A1，FRF-IDRY-19-013） 工程科学学报，第 42 卷，第 7 期：814−828，2020 年 7 月 Chinese Journal of Engineering, Vol. 42, No. 7: 814−828, July 2020 https://doi.org/10.13374/j.issn2095-9389.2019.08.27.002; http://cje.ustb.edu.cn