Analysis on Cracking and Perforation Defects of Heavy Plate Rolled from Large-Scale Ingot and Optimization of Casting Process

曹季林; 毛志刚; 赵向政

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Analysis on Cracking and Perforation Defects of Heavy Plate Rolled from Large-Scale Ingot and Optimization of Casting Process

更新时间：2026-01-21

- Analysis on Cracking and Perforation Defects of Heavy Plate Rolled from Large-Scale Ingot and Optimization of Casting Process
- Special Steel Vol. 34, Issue 4, Pages: 36-39(2013)
- 作者机构：
  
  1. 河南省工业学校,郑州,450002
  2. 舞阳钢铁公司第一炼钢厂，舞钢,462500
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：16 February 2013，
  
  Online First：11 September 2022，
  
  Published：11 September 2013
- 稿件说明：
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曹季林, 毛志刚, 赵向政. Analysis on Cracking and Perforation Defects of Heavy Plate Rolled from Large-Scale Ingot and Optimization of Casting Process[J]. Special Steel, 2013, 34(4): 36-39.
DOI：

曹季林, 毛志刚, 赵向政. Analysis on Cracking and Perforation Defects of Heavy Plate Rolled from Large-Scale Ingot and Optimization of Casting Process[J]. Special Steel, 2013, 34(4): 36-39. DOI：

摘要

分析了S355JR和S355J2低碳钢(/%:0.17～0.20C、0.30～0.55Si、1.40～1.60Mn、≤0.020P、≤0.015S、0.020～0.040A1、0.020～0.030Nb)28～40 t钢锭轧成230～400 mm钢板出现的开裂和穿孔缺陷。通过提高浇钢工操作水平

根据钢水过热度控制本体浇铸和帽口浇铸时问;控制精炼终点[O

]

≤25×10

-6

以及钢中铝含量0.020%～0.040%等优化浇铸工艺措施使钢锭探伤合格率提高到96.8%。

Abstract

An analysis on cracking and perforation defects occurred in 230 ~ 400 mm plates rolled from 28 ~40 t ingot of low carbon steel S355JR and S355J2 (/% ： 0. 17 ~0. 20C

0. 30 ~0. 55Si

1.40 - 1.60Mn

W0.020P

W0.015S

0. 020 ~ 0. 040Al

0. 020 ~0. 030Nb) is carried out. With the optimum process measures including increasing level of operation crews

controlling ingot body and hot top casting speed according to overheating extent of liquid

controlling refining end [O

]

≤ 25 x 10

-6

and aluminum content in steel 0. 020% 〜0. 040%

the ingot qualified ratio by nondestructive testing increases to 96. 8%.

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