| CaO-SiO2 -A2O3系保护渣加Li2O对高铝钢20Mn23AlV连铸板坯表面纵裂纹的影响 |
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| 引用本文： | 李晓军,李欢,李振. CaO-SiO2 -A2O3系保护渣加Li2O对高铝钢20Mn23AlV连铸板坯表面纵裂纹的影响[J]. 特殊钢, 2021, 42(4): 39-41 |
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| 作者姓名： | 李晓军 李欢 李振 |
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| 作者单位： | 山西太钢不锈钢股份有限公司1炼钢二厂;2技术中心，太原030003 |
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| 摘 要： | 研究了 1.5%～2.5% Al的20Mn23AlV钢200 mm × 1260 mm铸坯表面纵裂纹产生机理。结果表明:20Mn23AlV表面纵裂纹与结晶器保护渣变性有关。保护渣渣中加入5.49%的Li2O大幅提高了该钢种浇注过程保护渣理化指标的稳定性,且有利于将该钢种连铸坯表面纵裂发生几率由23.8%降至0.3%以下。
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| 关 键 词： | 铸坯 纵裂 保护渣变性 高铝钢20Mn23AlV |
| 收稿时间： | 2020-12-03 |
Effect of CaO-SiO2 -Al2O3 Series Mold Flux Adding Li2O on Cast Slab Surface Longitudinal Crack of High Aluminum Steel 20Mn23AlV |
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| Li Xiaojun,Li Huan,Li Zhen. Effect of CaO-SiO2 -Al2O3 Series Mold Flux Adding Li2O on Cast Slab Surface Longitudinal Crack of High Aluminum Steel 20Mn23AlV[J]. Special Steel, 2021, 42(4): 39-41 |
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| Authors: | Li Xiaojun Li Huan Li Zhen |
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| Affiliation: | 1 No. 2 Steelmaking Plant; 2 Technology Center,Shanxi Taigang Stainless Steel Co,Ltd,Taiyuan 030003 |
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| Abstract: | The mechanism of surface longitudinal cracks of 200 mm x 1 260 mm cast slab of 1.5% ~ 2.5% Al steel 20Mn23AlV has been studied. The results show that the surface longitudinal crack of steel 20Mn23AlV cast slab is related to the denaturation of mold flux. The mold flux added 5.49% Li2O can greatly improve the stability of the physical and chemical indexes of the mold flux during the casting process, and it is favourable to reduce the occurrence probability of cast slab longitudinal surface crack from 23.8% to below 0.3% . |
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