Abstract: With process measures including charging 30 ~40 t hot metal and 12 〜16 t quality scrap in 50 t EAF, EBT slag free tapping and adding 150 ~200 kg steel-clad aluminum to pre-deoxidize, diffusion deoxidation by SiC and controlling refining slag basicity 4.0 ~6.9 in LF process, soft argon blowing before and after VD, shielding casting and electromagnetic stirring in casting process, the total oxygen content in rolled products of bearing steel GCrl5 is 8 x 10^-9 x 10^-6. Analysis results show that the size of inclusions in steel before LF and after VD is generally ≤ 10 μm, maximum size is 40 and the sizes of most inclusions are 3 ~ 6 μm; before LF process the main inclusions in steel are Al₂O₃, magnesia alumina spinal, sulfide, Cr₂O₃ and TiO₂, before and after VD the main inclusions in steel are magnesia alumina spinal, CaS and MgO.

摘要： 通过50 t EAF配加30~40 t铁水和12~16 t优质废钢,EBT无渣出钢,加150~200 kg钢芯铝预脱氧,LF用SiC扩散脱氧,控制精炼渣碱度4.0~5.9, VD前后软吹氩、连铸保护浇铸和电磁搅拌等工艺措施,GCr15轴承钢轧材中的氧含量为8×10^-6~9×10^-6。分析结果表明,LF前至VD后钢中夹杂物尺寸一般≤10μm,最大尺寸40μm,大部分夹杂物尺寸为3~6μm; LF前主要夹杂物为Al₂O₃,镁铝尖晶石,硫化物,Cr₂O₃, TiO₂; VD前后为镁铝尖晶石,CaS和MgO。