Abstract: Φ90 mm,φ100 mm and φ105 mm products of bearing steel GCr15SiMn (%:1. 00C,0. 5Si,1. 0Mn, 1.45Cr,0.02Al) have    been    developed    by    60t    EAF-LF(VD)-300    mm×360    mm    bloom    casting-continuous    rolling process at Shijiazhuang Steel. With EAF eccentric bottom taping, controlling LF refining slag basicity ≥3.5, VD treating, completely   shielded   and   low   speed   casting (0.40～0.55   m/min), weak   secondary   cooling (0. 18~0.25   L/kg) and   electromagnetic   stiring  etc.  process measures, the [O] was≤8×10^-6 the total rating of inclusions in   steel was ≤2.5~3.0 with free flake, the rating of porosity and segregation ≤1.0, and the non-homogeneity of carbide met requirement of standard.

摘要： 石钢通过60t电弧炉-LF(VD)精炼-300mm×360mm矩坯连铸-连轧工艺生产Φ90mm、Φ100mm、Φ105mm轴承钢GCr15SiMn(%:1.00C、0.5Si、1.0Mn、1.45Cr、0.02Al) 。通过电弧炉无渣出钢、LF精炼渣碱度≥3.5, VD处理和全程保护浇铸,低拉速(0.40～0.55m/min),弱二冷(0.18～0.25L/kg),电磁搅拌等工艺措施,使[O]≤8×10^-6,钢中非金属夹杂物总级别2.5～3.0级,无发纹,疏松和偏析≤1.0级,碳化物不均匀性均满足标准要求。

关键词: 电弧炉 LF(VD), ,  GCr15SiMn轴承钢