北满特钢用90tEBT 电弧炉-LF(VD)-240mm×240mm方坯连铸生产CCr15轴承钢。GCr15轴承 钢钢包精炼时采用碱度为4.46的高碱度渣系,用含32.8%Al的脱氧剂,并进行25 min VD真空处理,保持 [Als]≤0.030%
统计结果表明GCr15轴承钢的氧含量≤8×10-⁶
Abstract
The CCr15 bearing steel is produced by a 90 t EBT arc furnace-LF(VD)-240 mm×240 mm billet concasting process at Beiman Special Steel. The statistic results showed that with using 4.46 high basicity slag series
deoxidant containing 32.8% Al
VD vacuum treatment for 25 min and controlling [Als
]
≤0.030%
the oxygen content in GCr15 bearing steel was ≤8×10