Process Practice for Reducing Corner Transverse Crack of Cast Slab of Steel A36 Bearing B

于学森; 彭其春; 童志博; 曹建新; 刘红军; 周春泉; 杨秀枝; 刘文华

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Process Practice for Reducing Corner Transverse Crack of Cast Slab of Steel A36 Bearing B

更新时间：2026-01-21

- Process Practice for Reducing Corner Transverse Crack of Cast Slab of Steel A36 Bearing B
- Special Steel Vol. 33, Issue 6, Pages: 29-31(2012)
- 作者机构：
  
  1. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,武汉,430081
  2. 湖南华菱涟源钢铁公司,娄底,417009
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：20 June 2012，
  
  Online First：28 September 2022，
  
  Published：28 September 2012
- 稿件说明：
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于学森, 彭其春, 童志博, et al. Process Practice for Reducing Corner Transverse Crack of Cast Slab of Steel A36 Bearing B[J]. Special Steel, 2012, 33(6): 29-31.
DOI：

于学森, 彭其春, 童志博, et al. Process Practice for Reducing Corner Transverse Crack of Cast Slab of Steel A36 Bearing B[J]. Special Steel, 2012, 33(6): 29-31. DOI：

摘要

A36含硼钢(/%:0.16～0.20C、0.10～0.25Si、0.20～0.40Mn、≤0.030P、≤0.015S、0.010～0.030Al、0.015～0.025Ti、0.001 0～0.001 8B)1 550 mm×230 mm板坯的生产流程为铁水预处理-210 t BOF-钢包吹氩-LF-连铸工艺。通过控制[C]≥0.16%

结晶器保护渣碱度由1.23提高到1.27

粘度由0.165 Pa·s降至0.123 Pa·s

在拉速1.0 m/min时负滑动时间由0.22 s降至0.15 s

降低结晶器和矫直段铸坯边部的冷却水量

控制铸机对弧精度和辊缝精度

铸坯表面未发现明显的横裂纹

铸坯的修磨量由0.18%降至0.03%。

Abstract

Production flow sheet for 1 550 mm x230 mm slab of steel A36 bearing B (/% : 0. 16 ~0. 20C

0. 10 ~0.25Si

0. 20 〜0.40Mn

≤0.030P

≤0. 015S

0. 010 〜0. 030Al

0. 015 ~0. 025Ti

0.001 0 ~0.001 8B) is hot metal pretreatment-210 t BOF-ladle argon blowing-LF-CC process. With the process measures including controlling [C] ≥ 0. 16%

increasing basicity of mold powder from 1. 23 to 1. 27 and decreasing its viscosity from 0. 165 pa • s to 0. 123 pa • s

decreasing negative shrip time from 0. 22 s to 0. 15 s as casting speed 1. 0 m/min

decreasing mold and cooling water rate of slab edge at straightening zone

improving accuracy of caster arc and roller gap

the comer transverse cracks are effectively reduced and the grinding rate decreases from original 0. 18% to 0. 03%.

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