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

高爱民; 杨琨; 冯运莉; 陈礼斌

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

更新时间：2026-01-21

- Continuous Cooling Transformation and Structure Refinement of A Low Carbon High Strength Steel Produced by FTSR
- Special Steel Vol. 30, Issue 5, Pages: 60-62(2009)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：18 March 2009，
  
  Online First：18 November 2022，
  
  Published：18 November 2009
- 稿件说明：
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高爱民, 杨琨, 冯运莉, et al. Continuous Cooling Transformation and Structure Refinement of A Low Carbon High Strength Steel Produced by FTSR[J]. Special Steel, 2009, 30(5): 60-62.
DOI：

高爱民, 杨琨, 冯运莉, et al. Continuous Cooling Transformation and Structure Refinement of A Low Carbon High Strength Steel Produced by FTSR[J]. Special Steel, 2009, 30(5): 60-62. DOI：

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。

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.

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Related Institution

中国矿业大学(北京校区)材料科学与工程系

河北理工大学

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