中低碳钢小方坯铸坯表面凹陷改进技术  

Improvement of surface sag of medium and low carbon steel billet

作　　者：韦乾永 刘成斌 叶祖新 WEI Qian-yong;LIU Cheng-bin;YE Zu-xin(Preparatory Group for Intelligent Network Steel Plant,Baowu Group Guangdong Shaoguan Iron and Steel Co.,Ltd.,Shaoguan 512123,Guangdong,China)

机构地区：[1]宝武集团广东韶关钢铁有限公司网络钢厂筹建组,广东韶关512123

出　　处：《连铸》2021年第2期71-76,共6页Continuous Casting

摘　　要：针对韶钢生产中低碳小方坯铸坯表面出现凹陷问题,基于铸坯表面凹陷的产生机理,对保护渣的传热特性、设备功能精度对一次冷却的影响、水口对中精度对结晶器内初生坯壳均匀性与热应力的控制进行了分析,并针对影响凹陷的主要因素进行了调整和优化,使得中低碳小方坯铸坯表面质量得到大幅度改善。Aiming at the problem of surface depression of low and medium-carbon billet in Shaoguan Iron and Steel Co.,Ltd,based on the mechanism of surface depression,the heat transfer characteristics of the mold flux,the influence of the precision of the equipment function on the primary cooling,and the influence of nozzle alignment accuracy on the uniformity and thermal stress of the primary solidified shell in the mold were analyzed.The main factors affecting the depression have been adjusted and optimized,so that the surface quality of the low and medium-carbon billet has been greatly improved.

关 键 词：小方坯 质量 凹陷 保护渣 连铸 

分 类 号：TF777.3[冶金工程—钢铁冶金]