Abstract: The CCr15 bearing steel is produced at Laiwu Steel by using foaming slag submerged are operation in whole period of EAF steelmaking,EBT tapping alloying,LF secondary refining slag basicity being 4.0～5.0,main composition of refining   slag-45～50CaO,9~13SiO₂,9～13Al₂O₃,7~8MgO,diffusion-deoxidizing   by  SiC and Ar  stiring   with   flow rate 40~60 L/min,VD treatment time ≥15 min,and casting with shielding practice in whole period. The average oxygen content in GCr15 bearing steel is 7.9×10^-6,and the maximum oxygen content is  10×10^-6.

Key words: GCr15 Bearing Steel,EAF-LF(VD)-CC Process,Oxygen Content

摘要： 莱钢采用EAF全程泡沫渣埋弧操作,EBT出钢合金化,LF 2次精炼渣碱度4.0~5.0,精炼渣的主要成分(%)为:45~50CaO,9~13SiO₂,9~13Al₂O₃,7~8MgO,SiC扩散脱氧和40~60 L/min流量氩气搅拌,VD处理时间≥15 min,连铸全程保护浇铸生产GCr15轴承钢。GCr15轴承钢中的平均氧含量为7.9×10^-6,最高氧含量为10×10^-6。

关键词: GCr15轴承钢, EAF-LF(VD)-CC ,  , 氧含量