高拉速生产小方坯包晶钢表面质量控制与改善  

Control and improvement for surface quality of peritectic steel billet with high casting speed

作　　者：高宇波 管蒙寒 张建斌 包燕平 GAO Yubo;GUAN Menghan;ZHANG Jianbin;BAO Yanping(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;Technology Center,Zenith Steel Co.,Ltd.,Changzhou 213000,China)

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]中天钢铁集团有限公司技术中心,江苏常州213000

出　　处：《炼钢》2022年第2期49-53,共5页Steelmaking

摘　　要：针对传统包晶钢保护渣在使用过程中的不足,确保保护渣传热性能的前提下兼顾润滑效果,为小方坯包晶钢的连铸高效稳定生产提供新的技术方案。通过保护渣成分设计优化,在原有保护渣的基础上适当降低碱度和黏度,引入LiO_(2)和过渡族金属氧化物(Fe_(2)O_(3)、MnO),并降低F含量,改善了保护渣在高拉速生产条件下的适用性及稳定性。在一系列保护渣性能关联性、兼容性设计优化及使用条件改进下,高拉速生产包晶钢小方坯铸坯探伤合格率由不足35%提升至93%以上,实现了小方坯包晶钢连铸的连续高效、高质量生产。For the disadvantages of traditional mold flux of peritectic steel,this paper proposed a novel type of mold flux,which combined both heat transfer and lubrication effects,providing a new solution for the stable high-efficiency production of peritectic steel billet.Through the proper decrease of basicity and viscosity of previous mold flux for peritectic steel,introduction of LiO_(2) and oxides of transition metallic elements(Fe_(2)O_(3),MnO),as well as the content reduction of fluorine,the applicability and stability of the mold flux for the casting of peritectic steel billet at high casting speed were improved.In view of associrelation and compatibility of series flux properties,as well as service conditions,the qualified ratio of defect-inspection for the peritectic steel billet was highly improved from less than 35%to more than 93%,and a continuous high-efficiency and high-quality production way of peritectic steel billet was achieved with the appropriate employment of the novel mold flux for peritectic steel.

关 键 词：包晶钢 保护渣 小方坯 表面质量 高拉速 

分 类 号：TF777.3[冶金工程—钢铁冶金]