第36卷第11期 北京科技大学学报 Vol.36 No.11 2014年11月 Journal of University of Science and Technology Beijing Now.2014 退火温度对退火马氏体基TRP钢显微组织和力学性 能的影响 丁然”，唐获”，陈银莉四，赵爱民”，邝霜，姜英花 1)北京科技大学治金工程研究院，北京1000832)首钢技术研究院，北京100043 ☒通信作者，E-mail:yinli chen@usth.cu.cn 摘要将CSi一M系TRIP钢通过完全淬火和两相区退火相结合的工艺，得到一种以退火马氏体为基体的TRP钢（简称 TAM钢)，并对比分析了TAM钢在不同温度退火后的显微组织和力学性能.结果表明，TAM钢经退火后的显微组织特征为精 细规整的板条退火马氏体基体、片状残余奥氏体和贝氏体/马氏体组成的混合组织.这种组织降低了基体的硬度以及基体和 第二相之间的强度比，减少了基体的位错密度.随着退火温度的提高，退火马氏体基体的板条形态逐渐消失，新生马氏体/贝 氏体的团状混合组织逐渐增多.当退火温度为780℃时，综合力学性能优异，抗拉强度为1130MP,延伸率可达20%，强塑积 为22600MPa·%.当退火温度较低时，残余奥氏体主要以片状存在于退火马氏体板条间，有利于TRP效应的发生. 关键词高强钢：退火温度：马氏体：显微组织：力学性能 分类号TG142.1 Effects of annealing temperature on the microstructure and mechanical properties of TRIP steel with annealed martensitic matrix DING Ran,TANG Di,CHEN Yin-i,ZHAO Ai-min,KUANG Shuang?,JIANG Ying-hua? 1)Engineering Research Institute,University of Science and Technology Beijing,Beijing 100083,China 2)Shougang Technical Research Institute,Beijing 100043,China Corresponding author,E-mail:yinli_chen@ustb.edu.cn ABSTRACT Special TRIP steel with annealed martensite matrix (TAM steel)was produced by fully quenching and annealing in the two-phase region with the C-Si-Mn chemical composition of common TRIP steel.The microstructure and mechanical properties of TAM steel annealed at different temperatures were investigated by thermal dilatometry,tensile testing,optical microscopy,scanning electron microscopy,transmission electron microscopy,and X-ray diffraction.It is found that the microstructure of TAM steel consists of a uni- form fine annealed martensite matrix and an interlath second phase of retained austenite and bainite/martensite,which contribute to lowering the matrix's hardness and the strength ratio of matrix to second phase as well as decreasing the dislocation density.As the an- nealing temperature rises,the mixed blocky microstructure of newly formed martensite/bainite gradually increases,while the lath-like morphology of annealed martensite progressively disappears.Excellent mechanical properties are obtained when the annealing tempera- ture is 780C,with the tensile strength,the elongation,and the product of strength and ductility up to 1130 MPa,20%,and 22600 MPa%,respectively.When the annealing temperature is relatively low,retained austenite mainly exists between annealed martensite laths in film-form and is conducive to the occurrence of TRIP effect. KEY WORDS high strength steel;annealing temperature;martensite:microstructure:mechanical properties 自20世纪末开始，汽车的减排减重以及提高抗 可以通过应用可成形的高强度钢材和新的生产技术 冲击性成为汽车制造业的趋势，为了达到这些目标， 以及严格的结构设计来实现，各大钢铁制造企业也 收稿日期：201308-29 DOI:10.13374/j.issn1001-053x.2014.11.008:http:/journals.ustb.edu.cn第 36 卷 第 11 期 2014 年 11 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol． 36 No． 11 Nov． 2014 退火温度对退火马氏体基 TＲIP 钢显微组织和力学性 能的影响 丁 然1) ，唐 荻1) ，陈银莉1) ，赵爱民1) ，邝 霜2) ，姜英花2) 1) 北京科技大学冶金工程研究院，北京 100083 2) 首钢技术研究院，北京 100043  通信作者，E-mail: yinli_chen@ ustb． edu． cn 摘 要 将 C--Si--Mn 系 TＲIP 钢通过完全淬火和两相区退火相结合的工艺，得到一种以退火马氏体为基体的 TＲIP 钢( 简称 TAM 钢) ，并对比分析了 TAM 钢在不同温度退火后的显微组织和力学性能． 结果表明，TAM 钢经退火后的显微组织特征为精 细规整的板条退火马氏体基体、片状残余奥氏体和贝氏体/马氏体组成的混合组织． 这种组织降低了基体的硬度以及基体和 第二相之间的强度比，减少了基体的位错密度． 随着退火温度的提高，退火马氏体基体的板条形态逐渐消失，新生马氏体/贝 氏体的团状混合组织逐渐增多． 当退火温度为 780 ℃时，综合力学性能优异，抗拉强度为 1130 MPa，延伸率可达 20% ，强塑积 为 22600 MPa·% ． 当退火温度较低时，残余奥氏体主要以片状存在于退火马氏体板条间，有利于 TＲIP 效应的发生． 关键词 高强钢; 退火温度; 马氏体; 显微组织; 力学性能 分类号 TG 142. 1 Effects of annealing temperature on the microstructure and mechanical properties of TＲIP steel with annealed martensitic matrix DING Ｒan1) ，TANG Di1) ，CHEN Yin-li1)  ，ZHAO Ai-min1) ，KUANG Shuang2) ，JIANG Ying-hua2) 1) Engineering Ｒesearch Institute，University of Science and Technology Beijing，Beijing 100083，China 2) Shougang Technical Ｒesearch Institute，Beijing 100043，China Corresponding author，E-mail: yinli_chen@ ustb． edu． cn ABSTＲACT Special TＲIP steel with annealed martensite matrix ( TAM steel) was produced by fully quenching and annealing in the two-phase region with the C--Si--Mn chemical composition of common TＲIP steel． The microstructure and mechanical properties of TAM steel annealed at different temperatures were investigated by thermal dilatometry，tensile testing，optical microscopy，scanning electron microscopy，transmission electron microscopy，and X-ray diffraction． It is found that the microstructure of TAM steel consists of a uni￾form fine annealed martensite matrix and an interlath second phase of retained austenite and bainite /martensite，which contribute to lowering the matrix’s hardness and the strength ratio of matrix to second phase as well as decreasing the dislocation density． As the an￾nealing temperature rises，the mixed blocky microstructure of newly formed martensite / bainite gradually increases，while the lath-like morphology of annealed martensite progressively disappears． Excellent mechanical properties are obtained when the annealing tempera￾ture is 780 ℃，with the tensile strength，the elongation，and the product of strength and ductility up to 1130 MPa，20% ，and 22600 MPa·% ，respectively． When the annealing temperature is relatively low，retained austenite mainly exists between annealed martensite laths in film-form and is conducive to the occurrence of TＲIP effect． KEY WOＲDS high strength steel; annealing temperature; martensite; microstructure; mechanical properties 收稿日期: 2013--08--29 DOI: 10． 13374 /j． issn1001--053x． 2014． 11． 008; http: / /journals． ustb． edu． cn 自 20 世纪末开始，汽车的减排减重以及提高抗 冲击性成为汽车制造业的趋势，为了达到这些目标， 可以通过应用可成形的高强度钢材和新的生产技术 以及严格的结构设计来实现，各大钢铁制造企业也