ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2009, Vol. 30 ›› Issue (2): 48-49.

• 工艺技术 • 上一篇    下一篇

GCr15轴承钢235 mm ×265 mm方坯连铸工艺的优化

王超1,袁守谦1,陈列2,王德炯2,张兵1   

  1. 1. 西安建筑科技大学冶金工程学院,西安 710055;
    2. 西宁特钢股份有限公司,西宁 810000;
  • 收稿日期:2008-09-03 出版日期:2009-04-01 发布日期:2022-12-05
  • 作者简介:王超(1969-),男,讲师,1993年西安建筑科技大学毕业,电弧炉炼钢和连铸技术研究。
  • 基金资助:
    陕西省教育厅专项课题资助(05JK248)

Optimization of Concasting Process for 235 mm x 265 mm Bloom of GCr15 Bearing Steel

Wang Chao1 , Yuan Shouqian1 , Chen Lie2 , Wang Dejiong2 , Zhang Bing1   

  1. 1. School of Metallurgical Engineering , Xi,an University of Architecture and Technology , Xi,an 710055;
    2. Xining Special Steel Co Ltd,Xining 810000 ;
  • Received:2008-09-03 Published:2009-04-01 Online:2022-12-05

摘要: 西宁特钢的GCr15轴承钢连铸坯由90 t UHP Consteel EAF-LF(VD)-CC流程生产。通过全程保护浇铸,钢中平均氧含量减少3.15×10-6;控制钢水过热度≤20℃,拉速0.7~0.8 m/min,二次冷却比水量0.40 L/kg,铸坯平均等轴晶率≥60%,且铸坯质量明显提高;在上述优化工艺参数下,采用3.25 Hz/250 A结晶器电磁搅拌和20 Hz/300 A凝固末端电磁搅拌,铸坯中心碳偏析指数为0.99~1.20。

关键词: GCr15轴承钢, 连铸工艺, 优化

Abstract: Cast bloom of GCrl5 bearing steel is produced by 90 t UHP Consteel EAF-LF(VD)-CC flow sheet at Xining Special Steel.With shielded casting practice in whole casting process,the average oxygen content in steel decreased by 3.15×10-6;by controlling the degree of superheat of molten steel ≤ 20 ℃,the casting speed 0.7~0.8 m/min and the secondary cooling water rate 0.40 L/kg,the average equiaxial crystal zone ratio of bloom was ≥ 60% and the quality of bloom obviously increased; and with above optimized process parameters and using 3.25 Hz/250 A EMS for mold and 20 Hz/300 A EMS for solidified front,the carbon segregation index in center of bloom was 0.99~1.20.

Key words: CCr15 Bearing Steel, Concasting Process, Optimization