中碳高铝钢表面缺陷研究及控制  

Research and control of surface defects of medium-carbon high-aluminum steel

作　　者：毛文文 路博勋 郭银涛 石晓伟 孟庆勇[1] 李梦龙[1] MAO Wen-wen;LU Bo-xun;GUO Yin-tao;SHI Xiao-wei;MENG Qing-yong;LI Meng-long(Technical Center,Tangshan Iron and Steel Group Co.,Ltd.,Tangshan 063000,Hebei,China;Technical and Quality Department,Tangshan Stainless Steel Co.,Ltd.,Tangshan 063100,Hebei,China)

机构地区：[1]唐山钢铁集团有限责任公司技术中心,河北唐山063000 [2]唐山不锈钢有限责任公司技术质量科,河北唐山063100

出　　处：《中国冶金》2021年第3期111-115,共5页China Metallurgy

摘　　要：中碳高铝钢由于铝元素含量高,其包晶反应及渣钢反应均很强烈,导致铸坯表面缺陷多发,经常出现纵裂、凹陷等缺陷。针对这些缺陷,从中碳高铝钢钢种成分出发,研究了钢种的包晶反应特性及裂纹敏感性。在此基础上,结合钢渣反应,对现有保护渣及连铸工艺进行了优化。工业生产实践表明,优化后的保护渣及相关连铸工艺参数,能有效控制中碳高铝表面缺陷的产生,避免纵裂及凹陷等缺陷的发生。Due to the high content of aluminum,the peritectic reaction and slag-steel reaction of medium-carbon highaluminum steel are very strong,which lead to multiple surface defects of slab,such as longitudinal cracks and depressions.In view of these defects,the characteristics of peritectic reaction and crack sensitivity of medium-carbon high-aluminum steel were studied from steel composition.On this basis,combined with slag reaction,the existing mold flux and continuous casting process were optimized.The industrial production practice showed that the optimized mold flux and relevant continuous casting process parameters can effectively control the surface defects of medium-carbon high-aluminum steel,and avoid the occurrence of longitudinal cracks and depressions.

关 键 词：中碳高铝钢 保护渣 纵裂 凹陷 包晶反应 

分 类 号：TF777[冶金工程—钢铁冶金]