【摘要】 莱钢特钢厂采用５０ｔＵＨＰ（ＥＢＴ）－５０ｔＬＦ精炼工艺生产轴承钢，质量指标符合ＹＢ９－６８标准，一次检验合格率１００％，钢中氧含量小于２．０×１０－３％，点状夹杂物出现率为０。结果分析证明，低碱度精炼渣可有效消除钢中点状夹杂物；碱度控制在２．０～２．５、渣量２％、钢中酸溶铝含量０．０２８％～０．０４０％、吹氩量６０００～８５００Ｌ／炉为最佳工艺参数。更多还原

【Abstract】 Special steel plant of Laiwu iron and steel general works makes use of 50t UHP(EBT)EAF-50t LF refining process to produce bearing steelThe quality of this steel accords with YB9-68 standard,once inspecting qualified ratio is up to 100%,the oxygen content in steel is low than 2010-3%,and the appearing ratio of point inclusion is 0The aralyzing result proves that the refining slag of low basicity can actively eliminate point inclusion in steel,and the optimum parameters in the operation process are controlling basicity within 2025,controlling the quantity of slag within 2%,controlling the content of acid-soluble aluminium within 0028%0040%,controlling the quantity of blowing argon within 60008000L/heat更多还原