学术论文

      低碳中锰热轧TRIP钢退火工艺及组织演变

      Annealing processing parameters and microstructure evolution of hot-rolled low-carbon medium-manganese TRIP steels

      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.
      Abstract:
      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.
      作者: 李振 [1] 赵爱民 [1] 唐获 [1] 米振莉 [1] 焦殿辉 [2]
      作者单位: 北京科技大学冶金工程研究院,北京,100083 环境保护部核与辐射安全中心,北京,100082
      刊 名: 北京科技大学学报 ISTICEIPKU
      年,卷(期): 2012, 34(2)
      分类号: TG335.3
      机标分类号: TG1 TB3
      在线出版日期: 2012年4月28日
      基金项目: 国家高技术研究发展计划资助项目,教育部博士点基金(博导类)资助项目