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.
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.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2006年第8期739-743,共5页
Journal of University of Science and Technology Beijing
关键词
TWIP钢
强度
塑性
退火孪晶
形变孪晶
TWIP steel
strength
plasticity
annealing twins
deformation twins
