优化精炼渣去除50Cr5MoV钢中Al_2O_3夹杂物的实验室研究  

Laboratory study on reducing Al_2O_3 inclusions in 50Cr5MoV steel by optimized refining slag

作　　者：叶明峰 吴光亮[1] YE Mingfeng WU Guangliang(School of Minerals Processing＆Bioengineering, Central South University, Changsha 410083, China)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《钢铁研究》2017年第2期19-23,共5页Research on Iron and Steel

摘　　要：为了减少某钢厂EBT-LF-VD-VC工艺生产的50Cr5MoV轧辊钢中的Al_2O_3夹杂物,在实验室条件下,对LF精炼渣进行优化,研究了不同w(CaO)/w(Al_2O_3)比值的LF精炼渣去除夹杂的能力。结果表明:当w(CaO)=50%~55%,w(Al_2O_3)=25%~30%,即w(CaO)/w(Al_2O_3)=1.5~2.0时,优化后的精炼渣不仅能够去除大量的铝脱氧产物Al_2O_3,而且残余夹杂基本都转变为直径1~5μm且具有塑性的CaO-MgO-Al_2O_3球形复合夹杂。To reduce the Al2O3 inclusions in 50Cr5 MoV roller steel produced through EBT-LF-VD-VC process in a steelmaking plant,the LF refining slag was optimized.The influences of optimized slag with different w（CaO）/w（Al2O3）ratios on reducing inclusions were investigated in the laboratory.The results showed that,when w（CaO）=50 %-55 %,w（Al2O3）=25 %-30 % and w（CaO）/w（Al2O3）=1.5-2.0,the slag could not only reduce massive Al2O3 coming from aluminium deoxidation,but also change the rest into plastic spherical CaO-MgO-Al2O3 compound inclusions whose diameters were 1-5μm.

关 键 词：50Cr5MoV轧辊钢 LF精炼 Al2O3夹杂物 预熔渣 去除 

分 类 号：TF769[冶金工程—钢铁冶金]