摘要
研究了第三代高强度高塑性TRIP钢的退火工艺对性能的影响和组织演变规律.热轧后形成的原始马氏体与临界退火时形成的残余奥氏体使TRIP钢具有良好的强度和塑性.结果表明:实验用钢可获得1000MPa以上的抗拉强度和30%以上的断后延伸率,且强塑积>30 GPa.%;退火温度和保温时间对钢的力学性能具有显著影响,热轧TRIP钢临界退火温度为630℃,保温时间18 h时,实验用钢能获得最佳的综合力学性能.
The effects of annealing processing on the mechanical properties and microstructure evolution of high strength and high ductility TRIP steels were investigated.The hot-rolled-and-annealed TRIP steel has remarkable strength and ductility due to the prior martensitic microstructure obtained in the as-hot-rolled condition and the retained austenite formed during intercritical annealing.The results show that the test steels have a tensile strength of over 1 000 MPa and an elongation of over 30%,and the product of ultimate tensile strength and total elongation exceeds 30 GPa·%.The mechanical properties are significantly influenced by intercritical annealing temperature and soaking time.When the TRIP steel is treated at an intercritical annealing temperature of 630 ℃ for 18h,the best mechanical properties are obtained.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2012年第2期132-136,共5页
Journal of University of Science and Technology Beijing
基金
国家高技术研究发展计划资助项目(2008AA03Z502)
教育部博士点基金(博导类)资助项目(20110006110007)
关键词
TRIP钢
残余奥氏体
锰
退火
微观组织
TRIP steels
retained austenite
manganese
annealing
microstructure
