东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2005, Vol. 26 ›› Issue (5): 452-455.DOI: -

• 论著 • 上一篇    下一篇

无硅TRIP钢力学性能的研究

李壮;吴迪;王佳夫   

  1. 东北大学轧制技术及连轧自动化国家重点实验室;东北大学轧制技术及连轧自动化国家重点实验室;东北大学轧制技术及连轧自动化国家重点实验室 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2005-05-15 发布日期:2013-06-24
  • 通讯作者: Li, Z.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50334010)

Study on mechanical properties of Si-free TRIP steel

Li, Zhuang (1); Wu, Di (1); Wang, Jia-Fu (1)   

  1. (1) State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2005-05-15 Published:2013-06-24
  • Contact: Li, Z.
  • About author:-
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摘要： 无硅TRIP钢采用临界区加热等温淬火热处理,获得铁素体,贝氏体及大量稳定残余奥氏体的三相组织·通过对其显微组织观察,断口形貌分析,与高硅TRIP钢力学性能的相互比较,探讨了无硅TRIP钢相变诱发塑性的行为·结果表明:无硅TRIP钢在拉伸变形过程中,应变诱导相变,相变诱发塑性;其拉伸断口形貌呈韧性断口特征;经790℃加热在400℃等温5min时,抗拉强度达到754MPa,延伸率达到36%,综合性能(强塑积)达到27144MPa%的最高值·

关键词: 无硅TRIP钢, 临界区等温淬火, 残余奥氏体, 应变诱导相变, 相变诱发塑性

Abstract: Bainite, ferrite and a large amount of stably retained austenite were obtained through austempering immediately after intercritical annealing of Si-free TRIP steel. The behaviour of TRIP (transformation-induced plasticity) effect was discussed through observing microstructure, analyzing fracture morphology and comparing it with the mechanical properties of high-Si TRIP steels. The results showed that Si-free TRIP steel has the excellent mechanical properties due to strain-induced martensite transformation which forms TRIP of retained austenite when it is strained, and its fracture morphology presents toughness characteristics. The tensile strength, total elongation and strength-ductility balance property of such Si-free TRIP steel all reach their maximum values (754 MPa, 36% and 27144 MPa%, respectively) when it is heated at 790°C and then held at 400° for 5 min.

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