D0L:10.13374.issn1001-053x.2013.09.008 第35卷第9期 北京科技大学学报 Vol.35 No.9 2013年9月 Journal of University of Science and Technology Beijing Sep.2013 退火时间对冷轧中锰TRIP钢组织和力学性能的影 尹鸿祥，赵爱民，赵征志，李振，汪志刚，孙璐 北京科技大学冶金工程研究院，北京100083 ☒通信作者，E-mail:aimin.zhao@ustb.edu.cn 摘要采用CCT-AY.Ⅱ型钢板连续退火机模拟分析了退火时间对中锰TRIP钢0.1C-7Mn组织性能的影响规律.利 用扫描电镜、透射电镜、电子背散射衍射和X射线能量色散谱等研究了不同工艺下制备的01C-7M钢的微观组织和 成分，利用X射线衍射法测量了残留奥氏体量，利用拉伸试验测试了其力学性能.0.1C-7Mn钢在650℃保温3in退 火后获得最佳的综合力学性能，其强度为1329MPa,总延伸率为21.3%，强塑积为28GPa-%.分析认为，0.1C-7Mn钢 的高塑性是由亚稳奥氏体的TP效应和超细晶铁素体共同提供的，而高强度是由退火冷却过程中奥氏体转变的马氏 体和拉伸变形过程中TP效应转变的马氏体的强化作用造成的. 关键词锰钢：冷轧：退火：微观组织：力学性能：汽车材料 分类号TG335.3 Effect of annealing time on the microstructure and mechanical prop- erties of a cold rolled medium-manganese TRIP steel YIN Hong-riang,ZHAO Ai-min ZHAO Zheng-zhi,LI Zhen,WANG Zhi-gang,SUN Lu Metallurgical Engineering Research Institute,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:aimin.zhao@ustb.edu.cn ABSTRACT The effects of annealing time on the microstructure and mechanical properties of a cold rolled medium- manganese TRIP steel 0.1C-7Mn were analyzed on a CCT-AY-II heat treatment system for thin steel sheet.The microstructure and composition of the steel obtained through different annealing processes were investigated by means of scanning electron microscopy,transmission electron microscopy,electron backscatter diffraction,and energy dispersive X-ray spectroscopy.The amount of retained austenite in the steel was determined by X-ray diffraction analysis and the mechanical properties were measured by tensile testing.The steel annealed at 650C for 3 min has the best comprehensive mechanical properties,with the tensile strength of 1329 MPa,the total elongation of 21.3%,and the product of tensile strength and elongation of 28 GPa.%.It is believed that the high plasticity is provided by the TRIP effect of metastable austenite together with ultra-fine grained ferrite.The high strength is caused by martensite which is directly transformed from austenite in the cooling process during annealing and obtained during the tensile deformation attributed to the TRIP effect. KEY WORDS manganese steel;cold rolling:annealing;microstructure;mechanical properties;automobile materials 高强度高塑性是汽车薄板一直追求的性能目强塑积在1020GPa%的水平，已经不能满足汽 标.特别是汽车轻量化和安全性要求的提高，要求车工业未来发展对轻量化和高安全的双重要求回 汽车结构件用钢具有高强塑积.第一代汽车用钢的第二代汽车用钢，它们的抗拉强度可以达到800~ 收稿日期：2012-08-07 基金项目：国家自然科学基金资助项目(50904006)：中央高校基本科研业务费专项(FRF-TP.10-001A):教育部博士学科点专项科 研基金资助项目(20110006110007)第 35 卷 第 9 期 北 京 科 技 大 学 学 报 Vol. 35 No. 9 2013 年 9 月 Journal of University of Science and Technology Beijing Sep. 2013 退火时间对冷轧中锰 TRIP 钢组织和力学性能的影 响 尹鸿祥，赵爱民 ，赵征志，李 振，汪志刚，孙 璐 北京科技大学冶金工程研究院，北京 100083 通信作者，E-mail: aimin.zhao@ustb.edu.cn 摘 要 采用 CCT-AY- Ⅱ型钢板连续退火机模拟分析了退火时间对中锰 TRIP 钢 0.1C-7Mn 组织性能的影响规律. 利 用扫描电镜、透射电镜、电子背散射衍射和 X 射线能量色散谱等研究了不同工艺下制备的 0.1C-7Mn 钢的微观组织和 成分，利用 X 射线衍射法测量了残留奥氏体量，利用拉伸试验测试了其力学性能. 0.1C-7Mn 钢在 650 ℃保温 3 min 退 火后获得最佳的综合力学性能，其强度为 1329 MPa，总延伸率为 21.3%，强塑积为 28 GPa·%. 分析认为，0.1C-7Mn 钢 的高塑性是由亚稳奥氏体的 TRIP 效应和超细晶铁素体共同提供的，而高强度是由退火冷却过程中奥氏体转变的马氏 体和拉伸变形过程中 TRIP 效应转变的马氏体的强化作用造成的. 关键词 锰钢；冷轧；退火；微观组织；力学性能；汽车材料 分类号 TG335.3 Effect of annealing time on the microstructure and mechanical prop￾erties of a cold rolled medium-manganese TRIP steel YIN Hong-xiang, ZHAO Ai-min , ZHAO Zheng-zhi, LI Zhen, WANG Zhi-gang, SUN Lu Metallurgical Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China Corresponding author, E-mail: aimin.zhao@ustb.edu.cn ABSTRACT The effects of annealing time on the microstructure and mechanical properties of a cold rolled medium￾manganese TRIP steel 0.1C-7Mn were analyzed on a CCT-AY-II heat treatment system for thin steel sheet. The microstructure and composition of the steel obtained through different annealing processes were investigated by means of scanning electron microscopy, transmission electron microscopy, electron backscatter diffraction, and energy dispersive X-ray spectroscopy. The amount of retained austenite in the steel was determined by X-ray diffraction analysis and the mechanical properties were measured by tensile testing. The steel annealed at 650 ℃ for 3 min has the best comprehensive mechanical properties, with the tensile strength of 1329 MPa, the total elongation of 21.3%, and the product of tensile strength and elongation of 28 GPa·%. It is believed that the high plasticity is provided by the TRIP effect of metastable austenite together with ultra-fine grained ferrite. The high strength is caused by martensite which is directly transformed from austenite in the cooling process during annealing and obtained during the tensile deformation attributed to the TRIP effect. KEY WORDS manganese steel; cold rolling; annealing; microstructure; mechanical properties; automobile materials 高强度高塑性是汽车薄板一直追求的性能目 标. 特别是汽车轻量化和安全性要求的提高，要求 汽车结构件用钢具有高强塑积. 第一代汽车用钢的 强塑积在 10∼20 GPa·%的水平，已经不能满足汽 车工业未来发展对轻量化和高安全的双重要求[1] . 第二代汽车用钢，它们的抗拉强度可以达到 800∼ 收稿日期：2012–08–07 基金项目：国家自然科学基金资助项目 (50904006)；中央高校基本科研业务费专项 (FRF-TP-10-001A)；教育部博士学科点专项科 研基金资助项目 (20110006110007) DOI:10.13374/j.issn1001-053x.2013.09.008