| 减少A36含硼钢板坯角部横裂纹的工艺实践 |
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| 引用本文： | 于学森,彭其春,童志博,曹建新,刘红军,周春泉,杨秀枝,刘文华.减少A36含硼钢板坯角部横裂纹的工艺实践[J].特殊钢,2012,33(6):29-31. |
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| 作者姓名： | 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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| 作者单位： | 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 |
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| 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%。
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| 关 键 词： | A36含硼钢 230mm板坯 角部横裂纹 保护渣 结晶器振动 冷却制度 |
| 收稿时间： | 2012-06-20 |
Process Practice for Reducing Corner Transverse Crack of Cast Slab of Steel A36 Bearing B |
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| Yu Xuesen
,
Peng Qichun
,
Tong Zhibo
,
Cao Jianxin
,
Liu Hongjun
,
Zhou Chunquan
,
Yang Xiuzhi
,
Liu Wenhua.Process Practice for Reducing Corner Transverse Crack of Cast Slab of Steel A36 Bearing B[J].Special Steel,2012,33(6):29-31. |
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| Authors: | Yu Xuesen Peng Qichun Tong Zhibo Cao Jianxin Liu Hongjun Zhou Chunquan Yang Xiuzhi Liu Wenhua |
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| Affiliation: | 1 Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081 ；
2 Hunan Lianyuan Iron & Steel Corporation of Hualing,Loudi 417009 |
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| 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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| Keywords: | Steel A36 Bearing B 230 mm Cast Slab Comer Transverse Crack Mold Powder Mold Oscillation Cooling Scheme |
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