渣成分对冶炼28MnCr5齿轮钢时CaO-SiO2-Al2O3-MgO精炼渣系熔点的影响  

Effect of Slag Ingredient on Melting Point of CaO-SiO_2 -Al_2O_3 -MgO Refining Slag Series for Gear Steel 28MnCr5 Steelmaking

作　　者：梁娜[1] 吴德发 翟正龙[1] 张利平[1] 

机构地区：[1]莱芜钢铁集团有限公司特钢事业部 [2]宽厚板厂,莱芜271104

出　　处：《特殊钢》2012年第4期10-12,共3页Special Steel

摘　　要：以28MnCr5齿轮钢(/%:0.28C、0.09Si、0.70Mn、0.015P、0.027S、0.95Cr)50 t电弧炉-LF-VD的生产过程为对象,利用热力学计算软件FactSage,研究CaO-SiO_2-Al_2O_3-MgO精炼渣系中不同成分比例对其熔点的影响,找出最佳的比例使夹杂物控制在低熔点区域,以便于去除。结果表明,(CaO)/(SiO_2)≤1时,低熔点区域占总相图面积的百分比较大;当CaO含量为30%时,低熔点区域占总相图面积的百分比达到所有的最大值,为53.2%;4组元最佳配比为(%)30CaO-30SiO_2-25Al_2O_3-15MgO。Based on the process of 50 t EAF-LF-VD for gear steel 28MnCr5 （/% ： 0. 28C, 0. 09Si, 0.70Mn, 0. 015P, 0. 027S, 0. 95Cr）, the effect of proportion of each ingredient in slag on melting point of CaO-SiO2-A1203-MgO refining slag series has been studied by using thermodynamic calculation software FactSage, to get optimum proportion of ingredients in order to control the inclusions in low melting point region and remove out. Results show that as （CaO）/（ SiO2 ）≤1, the percentage of low mehing point region to whole phase diagram area is larger and as CaO content in slag （CaO） is 30%, the percentage of low melting point region to whole phase diagram area is maximum i. e. 53.2% ; the optimum ingredient of quaternary refining slag series is （/%） 30CaO-30SiO2-25A1203-15MgO.

关 键 词：28MnCr5齿轮钢 精炼渣 相图 低熔点 

分 类 号：TF762[冶金工程—钢铁冶金]