IF钢生产过程非金属夹杂物行为研究  

Behavior of Non-metallic Inclusions of IF Steel During Production Process

作　　者：秦颐鸣[1] 王新华[1] 黄福祥[1] 季晨曦[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]首都钢铁公司技术研究院,北京100087

出　　处：《东北大学学报（自然科学版）》2015年第11期1614-1618,共5页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展计划项目(2010CB630806)

摘　　要：对首钢京唐生产IF钢的同一浇次前2炉的RH精炼、镇静和中间包浇铸过程进行了系统取样,并利用Aspex自动扫描电子显微镜分析统计了钢中夹杂物的成分、尺寸等信息.研究发现,Al2O3-TixO复合夹杂物在Ti合金化和二次氧化的情况下都会生成,并随着精炼的进行逐渐转变为Al2O3,这与热力学计算的结果一致;而Al2O3可以作为Al2O3-TixO的形核核心,形成Al2O3-TixO包裹Al2O3的夹杂物,并且在Al2O3-TixO转变为Al2O3的过程中会导致钢滴进入夹杂物内部,从而形成Al2O3包裹钢滴的夹杂物.The transition of non-metallic inclusions of IF steel produced by SGJT during RH refining and tundish was investigated. Molten steel samples were taken from 2 industrial heats systematically,and the compositions,size distribution and number of the inclusions were analyzed using Aspex scanning electron microscopy. The results showed that Ti alloying and reoxidation of molten steel results in the formation of Al2O3-TixO inclusions, then these inclusions are transformed into Al2O3 inclusions during RH refining,which is in agreement with thermodynamic calculation. In addition,Al2O3 inclusions could be the nucleus of Al2O3-TixO that wraps up them,and steel droplets outside enters into the interior of the inclusions in the transformation from Al2O3-TixO to Al2O3,so steel droplets exists in the interior of Al2O3 inclusions.

关 键 词：IF钢 水口堵塞 夹杂物 二次氧化 镇静时间 

分 类 号：TF769.2[冶金工程—钢铁冶金]