70 t EAF-LF-CC流程生产GCr15轴承钢的工艺实践

淮钢有限公司采用70t高阻抗电弧炉-80t钢包精炼炉-5流150mm×150mm 方坯连铸-连轧工 艺生产Φ12~60mm GCr15轴承钢。36炉轴承钢生产结果统计表明，为降低钢中残余元素和氢含量，通过炉料 中配入40%～50%铁水，精炼时全程氩气搅拌、钡合金脱氧、保护浇注等工艺措施，可使CCr15轴承钢连铸坯 中平均氧含量≤10×10-⁶,钢材疏松0.5～1.5级，偏析0.5~1.0级，夹杂物0.5～2.0级，各项指标均符合GB/T 182542002标准要求

Practice of Process for Production of GCr15 Bearing Steel by a 70 t EAF-LF-CC Flow Sheet

Φ12~60 mm bar products of CCr15 bearing steel are produced by a 70 t high impedance UHP EAF-a 80 t ladle refining furnace-5 strand 150 mm×150 mm billet concaster flow sheet at Huaigang Co Lad. The statistical results of 36 heats bearing steel production data showed that with the process operation such as electric arc furnace charging 40%~ 50% hot metal to decrease residual elements and hydrogen content in steel, whole time argon stirring in refining,deoxidation by barium alloy,and shielding casting, the average oxygen content in billet of CCr15 bearing steel was less than 10×10-⁶,the porosity rating in steel products 0.5～1.5,the segregation rating 0.5~1.0,inclusion rating 0.5~2.0,and each quality index was to meet the requirement of GB/T18254-2002 standard