金属热处理 ›› 2021, Vol. 46 ›› Issue (3): 166-169.DOI: 10.13251/j.issn.0254-6051.2021.03.033

• 组织与性能 • 上一篇    下一篇

960 MPa级高强钢的连续冷却转变

孙岩1, 赵楠1, 薛峰1, 安治国1, 郭银涛2   

  1. 1.河钢集团钢研总院, 河北 石家庄 050000;
    2.河钢唐钢不锈钢公司, 河北 唐山 063001
  • 收稿日期:2020-11-08 出版日期:2021-03-25 发布日期:2021-05-08
  • 通讯作者: 安治国,高级工程师,E-mail:anzhiguo@hbisco.com
  • 作者简介:孙岩(1991—),女,硕士,助理工程师,主要研究方向为钢的质量控制及性能,E-mail:yanyansun00@163.com。

Continuous cooling transformation of 960 MPa grade high strength steel

Sun Yan1, Zhao Nan1, Xue Feng1, An Zhiguo1, Guo Yintao2   

  1. 1. Steel Research Institute, Hesteel Group, Shijiazhuang Hebei 050000, China;
    2. Hesteel Tangsteel Stainless Steel Company, Tangshan Hebei 063001, China
  • Received:2020-11-08 Online:2021-03-25 Published:2021-05-08

摘要: 采用DIL805L淬火相变膨胀仪,结合光学和扫描电镜组织观察,对960 MPa级高强钢的连续冷却转变进行了研究。结果表明:冷速在0.1~2 ℃/s时,室温组织为铁素体+珠光体+贝氏体,冷速在2~10 ℃/s时,组织为铁素体+贝氏体;当冷速在20~80 ℃/s时,获得全贝氏体组织。在连续冷却转变曲线中,高温转变区和中温转变区未分开,且相变温度随着冷速的增大而减小。

关键词: 960 MPa高强钢, 组织, CCT曲线

Abstract: Continuous cooling transformation of 960 MPa grade high strength steel was analyzed by using DIL850L thermal dilatometer combined with metallographic and scanning electron microscopes. The results show that when the cooling rate is in the range of 0.1-2 ℃/s, the room temperature microstructure is of ferrite, pearlite and bainite; the ferrite and bainite are obtained in the range of 2-10 ℃/s; and the microstructure is all bainite in the range of 20-80 ℃/s. The high temperature transformation zone and the medium temperature transformation zone in the CCT curves are not separated, and the phase transformation temperature decreases with the increase of cooling rate.

Key words: 960 MPa high strength steel, microstructure, CCT curves

中图分类号: