模铸氩气保护浇注的工艺实践  

Practice of argon protection for ingot casting

作　　者：周同军[1] 刘军占[1] 

机构地区：[1]宝钢特钢有限公司,上海200940

出　　处：《世界钢铁》2012年第5期34-37,共4页World Iron & Steel

摘　　要：介绍一种实用的模铸氩气保护浇注方法,能有效地降低钢液浇注过程中的二次氧化,特别是明显降低法兰断口的夹杂物含量。在模铸浇注前对锭模进行30min充氩,并在浇注过程中采用全封闭氩气保护浇注(氩气流量控制在15～40Nm3/h),既可明显降低浇注系统内的氧体积分数至0.5%以下(空气中标定VO2为20.5%),又能有效减少发蓝断口的宏观夹杂物含量。This paper describes a practical method of ingot casting with argon atmosphere, which can effectively reduce liquid steel secondary oxidation during pouring performance, especially for the flange fracture inclusions. Blowing argon into the molds more than 30 min before pouring and pouring steel under completely closed dry argon （gas flow tate is between 15 and 40 Nm^3/h）protection can decrease not only the proportion of oxygen in the casting system （ demarcated 20.5 % in the air） to 0.5 %, but also the macro inclusions of flange fracture.

关 键 词：模铸 氩气保护浇注 氧含量 夹杂物 法兰断口 

分 类 号：TF777[冶金工程—钢铁冶金]