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本文结合生产,对鞍钢大型碱性平炉冶炼重轨钢的脱氧问题进行了试验。结果指出,在炉池内加脱氧剂进行预先脱氧的重轨成品含氧化物夹杂较少,尤以全部采用矽锰合金做炉池内脱氧剂的效果最佳,而在炉池内不加任何脱氧剂的重轨成品含氧化物夹杂量最多,后者往往超过前者一倍以上。重轨钢合硫一般达0.03—(0.04%,其中硫化物夹杂量与氧化物夹杂量相若,有时甚至达到后者的两倍。在这种情况下,决定钢的机械性能的主要因素是硫化物而不是氧化物,因此不同脱氧方法对重轨成品机械性能的影响不显著。在上述工作中,对重轨成品中氧化物夹杂的形状和大小也进行了分析,并指出在某些情况下铜液含氧量与铜成品中氧化物夹杂数量存在着相适应的关系。
This paper, combined with the production, carried out experiments on the deoxidation of heavy rail steel smelting by large basic hearth furnace in Ansteel. The results indicate that the inclusion of deoxidizer in the furnace pre-deoxidized oxygen rail products with less oxide inclusions, especially all using Si-Mn alloy furnace furnace deoxidizer best, while in the furnace without any deoxidizer Heavy rail finished oxide inclusions the most, the latter often more than double the former. Slab sulfur steel is generally 0.03 - (0.04%), of which sulfide inclusions and oxide inclusions are similar, sometimes even twice the latter.In this case, the main factor determining the mechanical properties of steel is Sulfides instead of oxides, so different deoxidation methods have no significant effect on the mechanical properties of heavy rail finished products.In the above work, the shape and size of oxide inclusions in heavy rail finished products were also analyzed, and pointed out that in some cases Under the oxygen content of copper and copper oxide inclusions in the finished product there is a corresponding relationship.