Abstract: The bearing steel GCrl5 is produced by 60 t converter -60 t ladle furnace(LF)- 150 mm×150 nm billet concasting process at Shijiazhuang Steel. The process practice showed that the oxygen cortent in steel was effectively controlled by catch carbon practice with average converter end [C] 0.30%,improving process to control slagging amount during corverter tapping,using CaO-SiO₂-Al₂O₃ high basicity slag in LF refining,adopting casing tube and argon blown protection from ladle to tundish and using sealing washer at tundish nozzle.The statistic results showed that the oxygen content in  bearing   steel,25   heats,was(6.5~11.9)× 10-⁶,the   average   oxygen   content   was    10.2×10-⁶.

摘要： 石钢采用60 t转炉-60 t LF-150 mm×150 mm方坯连铸工艺生产GCr15轴承钢。工艺实践表明,采用高拉碳操作法,转炉平均终点碳含量为0.30%;改进工艺控制转炉出钢下渣量;LF精炼时采用CaO-SiO₂-Al₂O₃高碱度渣;连铸时钢包到中间包采用套管和吹氩保护,中间包水口使用密封垫,有效地控制了钢中的氧含量。统计表明25炉轴承钢氧含量为(6.5~11.9)×10^-6,平均氧含量为10.2×10^-6。