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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
[ "于学森(1986-),男,硕士研究生,2010年武汉科技大学毕业,冶金工艺研究。" ]
收稿:2012-06-20,
网络首发:2022-09-28,
纸质出版:2012-09-28
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于学森, 彭其春, 童志博, 等. 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.
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.
于学森, 彭其春, 童志博, 等. 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. 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:
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%。
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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