| 大型钢锭轧板开裂和穿孔缺陷分析及浇铸工艺优化 |
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| 引用本文： | 曹季林,毛志刚,赵向政. 大型钢锭轧板开裂和穿孔缺陷分析及浇铸工艺优化[J]. 特殊钢, 2013, 34(4): 36-39 |
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| 作者姓名： | 曹季林 毛志刚 赵向政 |
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| 作者单位： | 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 |
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| 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%。
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| 关 键 词： | 低碳钢 28~40t大型钢锭 厚板 轧板开裂 穿孔缺陷 工艺优化 |
| 收稿时间： | 2013-02-16 |
Analysis on Cracking and Perforation Defects of Heavy Plate Rolled from Large-Scale Ingot and Optimization of Casting Process |
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| Cao Jilin , Mao Zhigang , Zhao Xiangzheng. 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 |
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| Authors: | Cao Jilin Mao Zhigang Zhao Xiangzheng |
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| Affiliation: | 1 Henan Province Industrial School, Zhengzhou 450Q02 2 First Steelmaking Works, Wuyang Iron and Steel Co, Wugang 462500 |
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| 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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