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通过采用优质铁水,高拉碳操作控制顶底复吹转炉终点[C]≥0.20%,LF精炼造渣材料加入前[Als]≥0.03%,精炼渣(FeO+MnO)≤1.0%,RH≤100 Pa的时间≥15 min,连铸钢水过热度≤30℃,结晶器电磁搅拌和凝固末端动态轻压等工艺措施,本钢GCr15轴承钢的平均T[O]≤8×10~(-6),[Ti]≤25×10~(-6),[Ca]≤10×10~(-6),连铸坯中心疏松0.5～1.0级,缩孔0～1.0级,等轴晶率41.5%～43.2%。
Through the use of high-quality hot metal, high-carbon operation control of the top and bottom blowing converter terminal [C] ≥ 0.20%, LF refining slag material before adding [Als] ≥ 0.03%, refining slag (FeO + MnO) ≤ 1.0% 100 Pa time ≥ 15 min, continuous casting water superheat ≤ 30 ℃, mold electromagnetic stirring and the end of the solidification soft reduction and other technical measures, Benxi Steel GCr15 bearing steel average T [O] ≤ 8 × 10 ~ (- 6], [Ti] ≤25 × 10-6, [Ca] ≤10 × 10-6, slab center loose 0.5-1.0, shrinkage 0-1.0, equiaxed grain rate 41.5% ~ 43.2%.