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Φ12～32 mm 20CrMo齿轮钢（/%：0.19～0.23C,0.48～0.58Mn,0.24～0.28Si,0.009～0.015P,0.003～0.012S,0.87～1.08Cr,0.17～0.18Mo,0.024～0.046Als）的生产流程为铁水脱硫-120 t顶底复吹转炉-LF-软吹-200 mm×200 mm方坯连铸-连轧工艺。结果表明,通过控制铁水[S]≤0.030%,BOF终点[C]≥0.08%,终点[P]≤0.012%,转炉出钢加0.6～1.0 kg/t铝块预脱氧控制L