含ZrO2类Ds夹杂物的来源及控制分析  

Source and control analysis of Ds inclusions containing ZrO2

作　　者：黄国俊 HUANG Guo-jun(Zenith Steel Group Co.,Ltd.,Changzhou 213011,Jiangsu,China)

机构地区：[1]中天钢铁集团,江苏常州213011

出　　处：《连铸》2020年第1期36-39,共4页Continuous Casting

摘　　要：对某厂产品中发现的含ZrO2类Ds夹杂物Ds类夹杂物来源进行了系统性的分析和研究,研究结果表明含ZrO2类Ds夹杂物产生的直接原因在于含Zr浸入式水口发生脱碳,脱碳通道内CaO-Al2O3-SiO2(-MgO)相中的SiO2将被钢液中的Al还原,最终成为CaO-Al2O3(-MgO)相,ZrO2仅起到了类似示踪剂的作用。The Ds inclusions containing ZrO2 found in the products of a factory were systematically analyzed and studied,The results show that decarburization of Zr-containing immersion nozzles leads to the inclusion of ZrO2-containing Ds inclusions. The CaO-Al2O3(-MgO)phase is derived from the decarburization channel. The SiO2 in the CaO-Al2O3-SiO2(-MgO)phase will be reduced by Al in the molten steel,ZrO2 only acts like a tracer.

关 键 词：ZRO2 DS 浸入式水口 脱碳 

分 类 号：TF777[冶金工程—钢铁冶金]