Control and Analysis on Edge Crack of Hot Rolled Strip Coil Produced by CSP Process

孙彦辉; 赵长亮; 孟征兵; 蔡开科; 成小军; 吴光亮; 周春泉

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Control and Analysis on Edge Crack of Hot Rolled Strip Coil Produced by CSP Process

更新时间：2026-01-21

- Control and Analysis on Edge Crack of Hot Rolled Strip Coil Produced by CSP Process
- Special Steel Vol. 27, Issue 4, Pages: 47-49(2006)
- 作者机构：
  
  1. 北京科技大学冶金与生态工程学院冶金研究中心,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：13 February 2006，
  
  Online First：18 March 2023，
  
  Published：18 March 2006
- 稿件说明：
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孙彦辉, 赵长亮, 孟征兵, et al. Control and Analysis on Edge Crack of Hot Rolled Strip Coil Produced by CSP Process[J]. Special Steel, 2006, 27(4): 47-49.
DOI：

孙彦辉, 赵长亮, 孟征兵, et al. Control and Analysis on Edge Crack of Hot Rolled Strip Coil Produced by CSP Process[J]. Special Steel, 2006, 27(4): 47-49. DOI：

摘要

经分析得出涟钢采用CSP工艺生产SS400钢板卷时

因不合理的二冷水量使70 mm薄板坯横向冷却不均匀和角部过冷

导致奥氏体中AlN析出造成晶界脆性

带钢在弯曲和矫直时产生边裂。通过控制钢中Al

含量为0．02％～0．03％及减少连铸过程吸氮和降低板坯边缘二冷水量等工艺措施

使SS400钢板卷的优等品率从92．27％提高到98．09％。

Abstract

It is obtained by analysis that the edge cracks occur during bending and straightening of strip due to 70 mm thin slab horizontal plane non-homogeneous cooling and edge over-cooling during production of SS400 steel strip Coil with irrational secondary cooling water rate led to precipitation of AIN in austenite and grain boundary britle. The high-quality product rate of SS400 steel strip coil increased from 92.27% to 98.09% by improved technology measure including to control Al

content 0.02%～0.03% in steel

decrease nitrogen pick-up during concasting and secondary cooling water rate at plate slab edge.

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