摘要
对高氮钢电渣重熔前后夹杂物进行对比研究,分析不同渣系和自耗电极氧含量对重熔后夹杂物的影响。研究发现,不同渣系对电渣钢的洁净度影响很大,适当提高w(Ca O)/w(Al2O3)可有效降低电渣锭中的夹杂物和全氧量。对高氮钢电渣重熔的脱硫进行研究,分析了不同渣系和熔炼速率对高氮钢脱硫率的影响,实验结果表明:电渣重熔后,硫化物夹杂的平均直径和单位面积数量大大减少,夹杂物的主要类型为Mn S+Al2O3复合型夹杂物,同时适度提高渣中Ca O含量实现提高硫分配比是提高脱硫效率的有效手段。脱硫动力学推导中发现重熔速率越低,脱硫效果越明显,但实验发现脱硫率随重熔速率的降低呈现先降低后升高的趋势,其原因在于渣池中发生硫化物富集,导致"回硫"现象发生。
This paper compares inclusions before and after ESR process and analyzes the influence of two slag systems and O content in consumable ingots. It shows that different slag systems will affect the result of inclusions removal,proper w（Ca O）/w（Al2O3） will reduce the level of inclusions and total oxygen content. This paper studies desulfurization process of high nitrogen steel in ESR,analyzes the influence of slag systems and remelting rate. The results indicate that the average diameter and quality of sulfide inclusion decrease after ESR process.The typical inclusion is Mn S＋Al2O3. Slag system with proper Ca O content has higher sulfur partition ratio,which leads to better desulfurization effect. In desulfurization kinetic study,it is founded that the desulfurization rate increases with lower remelting rate,which is different from experiment. The desulfurization rate decreases firstly and then recovers when remelting rate drops. The enrichment of sulfide in slag results in resulfurization in steel,which leads to lower desulfurization rate.
出处
《工业加热》
CAS
2015年第1期48-51,共4页
Industrial Heating
基金
高端金属材料特种熔炼与制备北京市重点实验室2014年度科技创新基地培育与发展工程专项项目(Z14111000440000)
关键词
夹杂物
电渣重熔
渣系
全氧量
洁净度
inclusion
electroslag remelting
slag system
total oxygen content
cleanliness
作者简介
汤旭炜（1984-），男，在读博士研究生，研究方向为电渣重熔制备高氮钢．
