Analysis and Improved Process Practice on Internal Crack of 260 mm×300 mm Concasting Billet

李法兴; 兰新哲; 宋永辉; 孙永喜

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Analysis and Improved Process Practice on Internal Crack of 260 mm×300 mm Concasting Billet

更新时间：2026-01-21

- Analysis and Improved Process Practice on Internal Crack of 260 mm×300 mm Concasting Billet
- Special Steel Vol. 28, Issue 1, Pages: 53-54(2007)
- 作者机构：
  
  1. 西安建筑科技大学,西安,710055
  2. 莱芜钢铁股份有限公司,莱芜,271105
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：11 July 2006，
  
  Online First：16 January 2023，
  
  Published：16 January 2007
- 稿件说明：
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李法兴, 兰新哲, 宋永辉, et al. Analysis and Improved Process Practice on Internal Crack of 260 mm×300 mm Concasting Billet[J]. Special Steel, 2007, 28(1): 53-54.
DOI：

李法兴, 兰新哲, 宋永辉, et al. Analysis and Improved Process Practice on Internal Crack of 260 mm×300 mm Concasting Billet[J]. Special Steel, 2007, 28(1): 53-54. DOI：

摘要

通过控制钢中硫含量≤0.020%

不同炉次中间包钢水温度波动范围由25 ℃降至10 ℃

调整结晶器水量为190~200m

控制拉速0.55~0.75 m/min

使20CrMnTiH 、40Cr、GCr15等钢种260 mm×300 mm连俦坯的内裂废品率由0.30%降低到0.01%

基本消除了铸坯内裂纹。

Abstract

With controlling sulphur content in steel≤0.020%

temperature fluctuation range of molten steel of df- ferent heat in tundish decreasing to 10 ℃ from original 25 ℃

adjusting mold water rate to 190～200 m

controling casting rate0.55~0.75 m/min

the intemal crack reject rate for 260 mm×300 mm cast billet of steel 20CrMnTiH

40Cr

CCr15 etc decreased to 0.01% from original 0.30%

in order to basically eliminate the intemal crack in cast billet.

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