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汽车用TWIP钢的力学性能与微观组织
引用本文:严玲,唐荻,米振莉,郭锦. 汽车用TWIP钢的力学性能与微观组织[J]. 北京科技大学学报, 2006, 28(8): 739-743
作者姓名:严玲  唐荻  米振莉  郭锦
作者单位:1. 北京科技大学高效轧制国家工程研究中心,北京,100083;鞍山钢铁集团公司技术中心,鞍山,114001
2. 北京科技大学高效轧制国家工程研究中心,北京,100083
摘    要:采用热轧、冷轧及退火处理等工艺,对成分为25Mn-3Si-3Al的TWIP钢进行了试制,研究了钢板的力学性能、微观组织及其断裂机制,并采用X射线测定了钢板的晶体学织构.实验结果表明:钢板拉伸时发生典型的延性断裂;拉伸前的组织为伴有大量退火孪晶的奥氏体;在拉伸过程中退火孪晶转变成形变孪晶,使产品的强度和塑性提高;退火过程中形成的织构组分有利于塑性变形.

关 键 词:TWIP钢  强度  塑性  退火孪晶  形变孪晶  汽车用  力学性能  微观组织  automobiles  used  TWIP steel  microstructure  塑性变形  组分  退火过程  强度  产品  形变孪晶  转变  拉伸过程  奥氏体  退火孪晶  延性断裂  发生  结果
收稿时间:2005-05-19
修稿时间:2006-03-24

Properties and microstructure of TWIP steel used in automobiles
YAN Ling,TANG Di,MI Zhenli,GUO Jin. Properties and microstructure of TWIP steel used in automobiles[J]. Journal of University of Science and Technology Beijing, 2006, 28(8): 739-743
Authors:YAN Ling  TANG Di  MI Zhenli  GUO Jin
Affiliation:1 National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, Beijing 100083, Chi na 2
Abstract:25Mn-3Si-3Al TWIP steel sheets were developed by hot rolling,cold rolling and annealing treatment processing. The mechanical properties,microstructure and fracture mechanism of the sheets were investigated and the crystal textures were confirmed by X-ray diffraction measurement. The results show that the fracture mechanism of the sheets is typical toughness fracture under the condition of tensile failure,and the microstructure is austenitic with a large number of annealing twins before tension. During tension the annealing twins change into deformation twins,which make the strength and plasticity of the sheets increase. The textures formed during annealing treatment are advantageous to the plasticity of steel sheets.
Keywords:TWIP steel  strength  plasticity  annealing twins  deformation twins
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