82B硬线钢精炼渣和夹杂物研究

从A12O3活度和夹杂物成分两方面来研究精炼渣对夹杂物的影响．采用Factsage软件对CaO—A1203-SiO3-MgO（8％）-CaF2（8％）炉渣中A1203，活度进行了计算，并研究了碱度和（MgO）含量对A12O3度的影响．当炉渣碱度从1．0增加到2．0时，炉渣中A1203活度随着炉渣碱度的增加而降低；当炉渣碱度从2．0增加到3．8时，A1203活度变化幅度很小；（MgO）质量分数分别为5％和8％的渣，A1203活度差距较小；在碱度高的炉渣中A1]。容易被从炉渣还原到钢水中．在使用高碱度精炼渣的盘条中发现许多含有MgO的硬性夹杂物，并对此进行了分析，最后得出最适宜的炉渣碱度为2．5—3．0．

Study on refining slag and inclusions in 82B hard wire steel

The effect of refining slag on inclusions was studied from two aspects,the activity of Al2O3 and the composition of inclusions.The activity of Al2O3 in a CaO-Al2O3-SiO2-MgO(8%)-CaF2(8%) slag was calculated by the thermodynamic software Factsage,and the influence of slag basicity and(MgO) content on the activity of Al2O3 were analyzed.When the slag basicity increases from 1.0 to 2.0,the activity of Al2O3 in the slag decreases rapidly,and when the slag basicity increases from 2.0 to 3.8,the activity of Al2O3 has little change.There is little difference in the activity of Al2O3 between the slags with(MgO) mass fractions of 5% and 8%,and s can be easily reduced into molten steel from the slag with high basicity.Many brittle inclusions containing MgO were found in wire rods with the high basicity refining slag,and by analysis the most appropriate basicity is 2.5 to 3.0.