ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2009, Vol. 30 ›› Issue (5): 60-62.

• 组织和性能 • 上一篇    下一篇

FTSR低碳高强钢连续冷却相变和组织细化

高爱民1,杨 琨1,冯运莉1,陈礼斌2   

  1. 1. 河北理工大学金属材料工程系,唐山 063009;
    2. 唐山钢铁有限公司技术中心,唐山 063016;
  • 收稿日期:2009-03-18 出版日期:2009-10-01 发布日期:2022-11-18
  • 作者简介:高爱民(1966-),女,硕士,副教授,冶金物理化学、金属材料的强化与韧化研究。
  • 基金资助:
    唐山市科学技术研究与发展计划资助项目,项目编号:04204501C-227

Continuous Cooling Transformation and Structure Refinement of A Low Carbon High Strength Steel Produced by FTSR

Gao Aimin1 , Yang Kun1 , Feng Yunli1  , Chen Libin2   

  1. 1. Metal Material Engineering Department,Hebei Polytechnic University,Tangshan 063009;
    2. Technology Centre,Tangshan lron and Steel Co Ltd,Tangshan 063016;
  • Received:2009-03-18 Published:2009-10-01 Online:2022-11-18

摘要: 用Gleeble-3500热模拟机研究了低碳钢 (%:0.19C、1.15Mn、0.008Mo、0.002Ti、0.032Als) 85 mm FTSR(薄板坯连铸连轧)铸坯在1 000℃以5 s-1速率变形40%,然后以5℃/s冷却到900℃并以50 s-1的速率变形30%,再以1~70℃/s冷却到400℃,空冷的连续相转变和组织。结果表明,冷却速度≤20℃/s时连续冷却转变的组织为铁素体和珠光体;冷却速度达30℃/s时,组织中出现少量粒状贝氏体。随冷却速度增加,晶粒尺寸减小,当冷却速度达10℃/s时,钢中的晶粒尺寸≤10μm,当冷却速度≥20℃/s时,钢中晶粒细化程度减弱。

关键词: FTSR工艺, 低碳高强度钢, 相变, 组织细化

Abstract: Continuous cooling transformation(CCT) and structure of 85 mm FTSR(Flexible Thin Slab rolling) cast slab ofa low carbon steel(%:0.19C,1.15Mn,0.008Mo,0.002Ti,0.032Als)deformed 40% with stain rate 5 s-1 at 1000 ℃ then cooling with 5℃/s to 900 ℃ and deformed 30% with 50s-1 and cooling to 400℃ with 1~70 ℃/s,then air cooling have been studied by Gleeble-3500 thermo-mechanical simulator.Results showed that as cooling rate ≤20 ℃/s,the CCT structure of steel was ferrite and pearlite,and as cooling rate was up to 30 ℃/s,minor globular bainite occurred in structure; with increasing cooling rate the grain size decreased,and as cooling rate was up to 10 ℃/s the grain size in steel was ≤ 10 μm and as cooling rate was ≥20℃/s.the grain refinement extent was minor.

Key words: FTSR Process, Low Carbon High Strength Steel, Transformation, Structure Refinement