工程科学学报，第41卷，第5期：557-572,2019年5月 Chinese Journal of Engineering,Vol.41,No.5:557-572,May 2019 D0L:10.13374/j.issn2095-9389.2019.05.002;htp:/journals.usth.edu.cm 中锰钢的研究进展与前景 徐娟萍，付豪，王正，岩雨，李金许四 北京科技大学新材料技术研究学院，北京100083 ☒通信作者，E-mail:Jxli65@usth.edu.cm 摘要总结了国内外中锰钢研究现状，对文献中中锰钢的成分设计、成型工艺、热处理工艺、组织性能调控等进行汇总分 析，得到了合金元素、成型工艺、微观组织结构和热处理对力学性能的影响规律，并对中锰钢的性能例如lds带和PLC带对 加工硬化率的影响、氢致延迟开裂性能给予了重点关注和讨论：同时提出借鉴第二代先进高强钢（纯奥氏体相）“层错能”这一 控制形变模式的概念，对中锰钢中奥氏体相的形变模式提出预测：最后对目前中锰钢研究的争议问题、发展前景及未来可能 面对的问题进行阐述 关键词中锰钢；TRP;强塑积；热处理；服役性能；氢脆 分类号TG142.71 Research progress and prospect of medium manganese steel XU Juan-ping,FU Hao,WANG Zheng,YAN Yu,LI Jin-xu Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083.China Corresponding author,E-mail:Jxli65@ustb.edu.cn ABSTRACT Medium manganese steels with the 3%-12%manganese content have outstanding tensile strength and elongation and low production cost.Thus,they are considered as third-generation advanced high-strength steels for automobiles.The research and development prospects and application potential of medium manganese steel in automotive parts have attracted wide attention both in China and overseas.After the medium manganese is deformed by forging or rolling,heat treatments such as quenching,tempering,and intercritical annealing is performed to obtain metastable austenite and ultra-fine ferrite/martensite microstructures.Metastable austenite transforms to martensite under flow stress,resulting in transformation-induced plasticity (TRIP)effect,which may be accompanied by twinning-induced plasticity (TWIP);the steel consequently exhibits good plasticity without sacrificing strength and thus meets the processing requirement of automobile parts with complex structures.The product of tensile strength and elongation of hot-rolled medium manganese steel,with chemical composition of Fe-0.2C-10Mn-4Al,under quenching and tempering can be larger than 70GPa%, which is higher than the current literature value.This paper summarized the current research status of medium manganese steel in Chi- na and abroad and analyzed the mechanical properties data of medium manganese steel with different chemical compositions,deforma- tion process,and heat treatment process in the literature.The influence of the chemical composition,deformation process,and heat treatment process on the microstructure and mechanical properties was discussed.The influences of special properties of medium man- ganese steels,such as luders band and PLC band,on work hardening rate and hydrogen-induced delayed cracking properties were com- prehensively discussed.Moreover,based on deformation control and prediction via the stacking fault energy of the second-generation advanced high-strength steel with pure austenite microstructure,the paper presented a deformation prediction model of the austenite phase in the medium manganese steel.Finally,the paper discussed the problems and prospects of the medium manganese steel. 收稿日期：2018-06-05 基金项目：国家自然科学基金面上资助项目(51571029)：宝武钢铁联合研究基金资助项目(U1760203,U1660104)工程科学学报,第 41 卷,第 5 期:557鄄鄄572,2019 年 5 月 Chinese Journal of Engineering, Vol. 41, No. 5: 557鄄鄄572, May 2019 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2019. 05. 002; http: / / journals. ustb. edu. cn 中锰钢的研究进展与前景 徐娟萍, 付 豪, 王 正, 岩 雨, 李金许苣 北京科技大学新材料技术研究学院, 北京 100083 苣通信作者, E鄄mail: Jxli65@ ustb. edu. cn 摘 要 总结了国内外中锰钢研究现状,对文献中中锰钢的成分设计、成型工艺、热处理工艺、组织性能调控等进行汇总分 析,得到了合金元素、成型工艺、微观组织结构和热处理对力学性能的影响规律,并对中锰钢的性能例如 l俟ders 带和 PLC 带对 加工硬化率的影响、氢致延迟开裂性能给予了重点关注和讨论;同时提出借鉴第二代先进高强钢(纯奥氏体相)“层错能冶这一 控制形变模式的概念,对中锰钢中奥氏体相的形变模式提出预测;最后对目前中锰钢研究的争议问题、发展前景及未来可能 面对的问题进行阐述. 关键词 中锰钢; TRIP; 强塑积; 热处理; 服役性能; 氢脆 分类号 TG142郾 71 收稿日期: 2018鄄鄄06鄄鄄05 基金项目: 国家自然科学基金面上资助项目(51571029);宝武钢铁联合研究基金资助项目(U1760203,U1660104) Research progress and prospect of medium manganese steel XU Juan鄄ping, FU Hao, WANG Zheng, YAN Yu, LI Jin鄄xu 苣 Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China 苣Corresponding author, E鄄mail: Jxli65@ ustb. edu. cn ABSTRACT Medium manganese steels with the 3% - 12% manganese content have outstanding tensile strength and elongation and low production cost. Thus, they are considered as third鄄generation advanced high鄄strength steels for automobiles. The research and development prospects and application potential of medium manganese steel in automotive parts have attracted wide attention both in China and overseas. After the medium manganese is deformed by forging or rolling, heat treatments such as quenching, tempering, and intercritical annealing is performed to obtain metastable austenite and ultra鄄fine ferrite / martensite microstructures. Metastable austenite transforms to martensite under flow stress, resulting in transformation鄄induced plasticity (TRIP) effect, which may be accompanied by twinning鄄induced plasticity ( TWIP); the steel consequently exhibits good plasticity without sacrificing strength and thus meets the processing requirement of automobile parts with complex structures. The product of tensile strength and elongation of hot鄄rolled medium manganese steel, with chemical composition of Fe鄄鄄0郾 2C鄄鄄10Mn鄄鄄4Al, under quenching and tempering can be larger than 70 GPa·% , which is higher than the current literature value. This paper summarized the current research status of medium manganese steel in Chi鄄 na and abroad and analyzed the mechanical properties data of medium manganese steel with different chemical compositions, deforma鄄 tion process, and heat treatment process in the literature. The influence of the chemical composition, deformation process, and heat treatment process on the microstructure and mechanical properties was discussed. The influences of special properties of medium man鄄 ganese steels, such as l俟ders band and PLC band, on work hardening rate and hydrogen鄄induced delayed cracking properties were com鄄 prehensively discussed. Moreover, based on deformation control and prediction via the stacking fault energy of the second鄄generation advanced high鄄strength steel with pure austenite microstructure, the paper presented a deformation prediction model of the austenite phase in the medium manganese steel. Finally, the paper discussed the problems and prospects of the medium manganese steel