【摘要】 对"LD→LF→VD→CC"工艺流程生产帘线钢各工位夹杂物类型、形貌和分布进行了研究。研究结果表明:帘线钢转炉出钢过程中加入帘线钢精炼渣对钢脱硫不利,但为后续精炼预造渣和对钢中夹杂物的变性提供了条件;为了使夹杂物获得良好的塑性,精炼过程中采用中性渣,调渣时禁止使用铝矾土,要求终渣碱度为0.9~1.1;对钢中大型夹杂物的分析发现,多数夹杂物成分为SiO2-Al2O3,部分存在Na2O和K2O,应该是耐火材料卷入造成的。选用优质耐火材料,控制钢水温度、铸坯拉速显得尤为重要。更多还原

【Abstract】 The type,morphology and distribution of the inclusion in tire cord steel at each operation position of"LDLFVDCC"production process were investigated.The result shows that it is bad for desulfurization to add refining slag during LD tapping,but it provides conditions for pre-slagging and inclusion modification in the following process.In order to gain a good plasticity of inclusion,neutral slag was used during refining process,it is forbidden to use bauxite at adjusting slag process,and the basicity of final slag was required at 0.9-1.1.Through analyzing the large inclusion,it can be found that most composition of inclusion is SiO2-Al2O3 and a small portion include Na2O and K2O.It should be involved refractories.Therefore,it is very important to use high quality refractories and control temperture of the molten steel and casting speed.更多还原