Abstract: With the process measures including using arc furnace heels operation, controlling EAF end [ C ] ≥ 0. 10% , LF refining white slag time ≥30 min, using hardenability calculated model to micro-adjusting the elements content in liquid, controlling tundish liquid overheating extent 15 ~30 °C , mold, strands and end electromagnetic stirring, the oxygen content in pilot production of Φ110 mm ~ Φ150 mm gear steel 22CrMoH (/% : 0.20-0.22C, 0.26- 0.28Si, 0.73-0.75Mn, 0.007-0.012P, 0.001 -0.004S, 1.05-1.09Cr, 0.37-0.39Mo) is 8x10^-6 -10x10^-6 , the rolled products J₁₅ △HRC value ≤4, the rating of inclusions ≤1. 0, and the rating of macro-structure ≤1. 0.

Key words: Gear steel 22CrMoH, 110 t EAF-LF-RH-CC Flowsheet, Hardenability Band Width, Oxygen Content, Pilot Production

摘要： 通过电弧炉留钢操作,控制EAF终点[C]≥0.10%,LF精炼白渣时间≥30 min,利用淬透性预测模型微调钢水中元素含量,控制中间包钢水过热度15~30℃、结晶器、铸流和末端电磁搅拌等工艺措施,试制的Φ110mm~Φ150 mm 22CrMoH齿轮钢（/%:0.20~0.22C，0.26~0.28Si，0.73~0.75Mn，0.007~0.012P，0.001~0.004S，1.05~1.09Cr，0.37~0.39Mo）的氧含量为8×10^-6~10×10^-6,轧材J₁₅△HRC值≤4,夹杂物≤1.0级,低倍组织≤1.0级。

关键词: 22CrMoH齿轮钢, 110 t EAF-LF-RH-CC流程, 淬透性带宽, 氧含量, 试制