A Study on Hot Ductility of Q235B Steel Thin Slab

孙彦辉; 赵长亮; 成小军; 吴光亮; 周春泉; 蔡开科

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A Study on Hot Ductility of Q235B Steel Thin Slab

更新时间：2026-01-21

- A Study on Hot Ductility of Q235B Steel Thin Slab
- Special Steel Vol. 27, Issue 2, Pages: 28-30(2006)
- 作者机构：
  
  1. 北京科技大学冶金与生态工程学院,北京,100083
  2. 湖南华菱涟源钢铁有限公司,娄底,417009
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：20 September 2005，
  
  Online First：02 March 2023，
  
  Published：02 March 2006
- 稿件说明：
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孙彦辉, 赵长亮, 成小军, et al. A Study on Hot Ductility of Q235B Steel Thin Slab[J]. Special Steel, 2006, 27(2): 28-30.
DOI：

孙彦辉, 赵长亮, 成小军, et al. A Study on Hot Ductility of Q235B Steel Thin Slab[J]. Special Steel, 2006, 27(2): 28-30. DOI：

摘要

根据Gleeble1500热/应变模拟试验机测试的CSP薄板坯连铸工艺生产的成分(%)为0.16~0.20C

0.020~0.060Al

Q235B钢的70 mm ×1 500 mm薄板坯600~1400℃热塑性曲线

得出连铸坯第Ⅲ脆性区为700~900℃

如在此温度范围矫直

铸坯易产生裂纹。通过扫描电镜分析断口形貌和电子探针的成分分析

得出形变诱导铁素体呈网状析出和奥氏体在低温区域析出氮化物(AlN)导致铸坯脆化。

Abstract

Based on the hot ductility curves at 600～1400 ℃ tested by Cleeble1500 thermal/strain simulation machine for 0.16~0.20C

0.020~0.060Al

Q235B steel 70 mm x 1500 mm thin slab produced by compact strip production (CSP)process

the third brittle zone of cast slab was between 700~900 ℃.Therefore the crack of cast slab easily forms as straightening in this temperature range. With fracture morphology analysis by scanning electron microscope and composition analysis by electron probe micro analyzer

it is obtained that the deformation-induced ferrite network precipitation and AlN precipitated at lower temperature austenitic range lead to cast slab embritlement.

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