CaO-SiO_(2)-Al_(2)O_(3)系保护渣加Li_(2)O对高铝钢20Mn23AlV连铸板坯表面纵裂纹的影响  

Effect of CaO-SiO_(2)-Al_(2)O_(3) Series Mold Flux Adding Li_(2)O on Cast Slab Surface Longitudinal Crack of High Aluminum Steel 20Mn23AlV

作　　者：李晓军[1] 李欢 李振[2] Li Xiaojun;Li Huan;Li Zhen(No.2 Steelmaking Plant,Shanxi Taigang Stainless Steel Co,Ltd,Taiyuan 030003;Technology Center,Shanxi Taigang Stainless Steel Co,Ltd,Taiyuan 030003)

机构地区：[1]山西太钢不锈钢股份有限公司炼钢二厂,太原030003 [2]山西太钢不锈钢股份有限公司技术中心,太原030003

出　　处：《特殊钢》2021年第4期39-41,共3页Special Steel

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Li_(2)O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。The mechanism of surface longitudinal cracks of 200 mm ×1 260 mm cast slab of 1.5%~2.5% Al steel20 Mn23 AlV has been studied.The results show that the surface longitudinal crack of steel 20 Mn23 AlV cast slab is related to the denaturation of mold flux.The mold flux added 5.49% Li_(2)O 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%.

关 键 词：铸坯 纵裂 保护渣变性 高铝钢20Mn23AlV 

分 类 号：TF777[冶金工程—钢铁冶金]