Analysis and Control on Center Cracks of Rectangular Billet of 45C Steel

吴华杰; 留津津; 包燕平; 王国

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Analysis and Control on Center Cracks of Rectangular Billet of 45C Steel

更新时间：2026-01-21

- Analysis and Control on Center Cracks of Rectangular Billet of 45C Steel
- Special Steel Vol. 32, Issue 2, Pages: 44-45(2011)
- 作者机构：
  
  1. 北京科技大学1冶金工程研究院
  2. 冶金与生态工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：05 December 2010，
  
  Online First：10 November 2022，
  
  Published：10 November 2011
- 稿件说明：
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吴华杰, 留津津, 包燕平, et al. Analysis and Control on Center Cracks of Rectangular Billet of 45C Steel[J]. Special Steel, 2011, 32(2): 44-45.
DOI：

吴华杰, 留津津, 包燕平, et al. Analysis and Control on Center Cracks of Rectangular Billet of 45C Steel[J]. Special Steel, 2011, 32(2): 44-45. DOI：

摘要

统计分析了[P]、[S]、[Mn]/[S]和钢水过热度等工艺因素对钢厂45钢(0.44%～0.50%)160 mm×200 mm矩形坯中心裂纹的影响。根据分析结果

采用控制[P]≤0.020%、[S]≤0.015%、[Mn]/[S]≥40

钢水过热度≤25℃

拉速1.8m/min时优化二冷水量等工艺措施

使中心裂纹发生率由原来的82.76%降低到22.41%

1级以上中心裂纹发生率由原来的22.41%降低到0.51%。

Abstract

The effect of [P]

[S]

[Mn]/[S] and process factors including superheating degree of liquid on center cracks of 160 mm x 200 mm rectangular billet of 45C Steel (0. 44% 〜0. 50% C) has been classified

counted and analyzed. According to analysis results the process measures including controlling [P]≤0. 020%

[S]≤015%

[ Mn]/ [S]≥40

superheating degree ≤25

and optimizing secondary cooling water rate with casting speed 1. 8 m/min are a- dopted

as a result the occurring rate of center cracks decreases from original 82. 76% to 22. 41% and that more than rating 1 decreases from original 22. 41% to 0. 51% .

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