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为改善SPHC钢LF精炼效果,本研究首先利用Fact Sage热力学计算软件,分析了SPHC钢LF精炼渣系的理化特性,提出相应的精炼渣优化方案,并进行了工业实验验证.研究结果显示,通过对LF精炼渣系的优化,出站时钢中全氧T[O]由优化前的24×10~(-6)下降至优化后的20×10~(-6),显微夹杂物总数去除率由优化前的56.57%增加至优化后的71.54%,大型夹杂物数量也由原来的85.42 mg/10 kg下降至42.45 mg/10 kg.
In order to improve the LF refining effect of SPHC steel, this paper first used Fact Sage thermodynamic calculation software to analyze the physical and chemical properties of LF refining slag system of SPHC steel, and proposed the corresponding optimization program of refining slag, and carried out industrial experimental verification.The results show that, For the optimization of LF refining slag system, the total oxygen T [O] in steel decreases from 24 × 10 -6 before optimization to 20 × 10 -6 after optimization, and the total number of micro-inclusions The removal rate increased from 56.57% before optimization to 71.54% after optimization, and the number of large inclusions decreased from 85.42 mg / 10 kg to 42.45 mg / 10 kg.