Process Practice for Bearing Steel GCr15 Produced by 60 t BOF-LF (VD) -150 mm x 150 mm Casting Flow Sheet

Special Steel ›› 2011, Vol. 32 ›› Issue (5): 38-40.

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Process Practice for Bearing Steel GCr15 Produced by 60 t BOF-LF (VD) -150 mm x 150 mm Casting Flow Sheet

Wang Wenhu¹ , Li Bing¹ , Zheng Gaoli¹ , Xu Junmin¹ , Yao Shufang²

1. Henan Ji yuan Iron and Steel (Group) Co Ltd, Jiyuan 454650 ；
2. National Engineering Research Center for Continuous Casting Technology, Center Iron and Steel Research Institute, Beijing 100081 ；

Received:2011-03-28 Online:2011-10-01 Published:2022-11-02

60 t BOF-LF(VD) -150 mm x 150 mm 连铸生产 GCr15 轴承钢的工艺实践

王文虎¹，李冰¹，郑高立¹，许军民¹，姚书芳²

1. 河南济源钢铁(集团)有限公司，济源 454650；
2. 钢铁研究总院连铸技术国家工程研究中心，北京 100081；

作者简介:王文虎(1971-)，男，工程师，2005年内蒙占科技大学毕业，炼钢生产技术研究。

Abstract

Abstract: The 150 mm x 150 mm casting billet of bearing steel GCr15 is produced at Jiyuan Iron and Steel Co by using 601 top and bottom combined blowing converter melting with carbon catch operation to control converter end [C] 0.08% ~0.20% , ladle bottom argon blowing and adding aluminium-iron in ladle during tapping for oxidation, using CaO- Al₂O₃-SiO₂ high basicity slag in LF refining, controlling casting liquid overheating degree 20 ~ 30 ℃ , M + F electromagnetic stirring, whole process argon shielding casting and casting billet stacking slow cooling process. Practice results show that the oxygen content in bearing steel GCr15 is (6.3 x 11.9) x 10^-6, average oxygen content is 9 x 10^-6, and the macro structure of casting billet is better.

Key words: 60 t BOF-LF (VD)-150 mm x 150 mm Casting, Bearing Steel GCr15, Process Practice

摘要： 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-Al₂O₃-SiO₂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。

关键词: 60 t BOF-LF(VD)-150 mm x 150 mm连铸, GCr15轴承钢, 工艺实践

Wang Wenhu , Li Bing , Zheng Gaoli , Xu Junmin , Yao Shufang. Process Practice for Bearing Steel GCr15 Produced by 60 t BOF-LF (VD) -150 mm x 150 mm Casting Flow Sheet[J]. Special Steel, 2011, 32(5): 38-40.

王文虎, 李冰, 郑高立, 许军民, 姚书芳. 60 t BOF-LF(VD) -150 mm x 150 mm 连铸生产 GCr15 轴承钢的工艺实践[J]. 特殊钢, 2011, 32(5): 38-40.

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Process Practice for Bearing Steel GCr15 Produced by 60 t BOF-LF (VD) -150 mm x 150 mm Casting Flow Sheet

60 t BOF-LF(VD) -150 mm x 150 mm 连铸生产 GCr15 轴承钢的工艺实践

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