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济源钢铁公司采用60 t顶底复吹转炉高拉碳操作法,控制转炉终点[C]0.08%～0.20%,出钢过程钢包底吹氩并加铝铁脱氧,LF采用CaO-Al_2O_3-SiO_2高碱度渣精炼,连铸钢水过热度20～30℃,M+F电磁搅拌,全程吹氩保护浇铸,铸坯堆垛缓冷工艺生产150 mm×150 mm GCr15轴承钢铸坯。实践表明,GCr15轴承钢的氧含量为(6.3～11.9)×10~(-6),平均氧含量为9×10~(-6),连铸坯的低倍组织良好。
Jiyuan Iron and Steel Company with 60 t top and bottom blowing converter high carbon operation method, the control of the converter [C] 0.08% to 0.20%, during ladle argon blowing and ladle with aluminum deoxidation, LF CaO-Al_2O_3-SiO_2 high Alkali slag refining, continuous casting molten steel superheat 20 ~ 30 ℃, M + F electromagnetic stirring, the whole argon protection casting, slab stacking slow cooling process production 150 mm × 150 mm GCr15 bearing steel slab. The practice shows that the oxygen content of GCr15 bearing steel is (6.3 ~ 11.9) × 10 -6, the average oxygen content is 9 × 10 -6, and the billet structure of GCr15 is good.