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 (1): 48-49.

• 工艺技术 • 上一篇    下一篇

提高20CrMnTiH齿轮钢夹杂物合格率的工艺实践

刘昭   

  1. 本溪钢铁集团公司特殊钢厂,本溪117000
  • 收稿日期:2008-07-16 出版日期:2009-02-01 发布日期:2022-11-30
  • 作者简介:刘昭(1975-),男,工程师,2000年本溪冶专毕业,电弧炉炼钢工艺,

Practice of Process for Increasing Ratio of Qualified 20CrMnTiH Gear Steel Products with Non-metallic Inclusion Examination

Liu Zhao   

  1. Special Steel Works, Benxi Iron and Steel (Group) Co, Benxi 117000
  • Received:2008-07-16 Published:2009-02-01 Online:2022-11-30

摘要: 本钢特殊钢厂20CrMnTiH齿轮钢采用EAF(出钢量45t)-LF-CC工艺流程生产。通过控制电弧炉脱碳量≥0.25%C,保证脱碳速度0.02%C/min,出钢前加0.2%锰铁,使终点碳≥0.10%;电弧炉出钢加铝铁或硅钡钙铝3.0 kg/t进行沉淀脱氧,LF加入3~5 kg/t脱氧剂扩散脱氧,使(FeO)≤0.5%,钢包钢水浇铸前在0.1~0.3 MPa氩气压力镇静吹氩≥15min,使20CrMnTiH钢的夹杂物一次合格率从88.35%提高到92.49%。

关键词: 20CrMnTiH齿轮钢, 夹杂物, 冶炼工艺

Abstract: 20CrMnTiH gear steel is produced by EAF (tapping 45 t steel) -LF-CC process flow sheet al Special Steel Works, Bensteel. With controlling arc furnace liquid steel decarburizing amount ≥0. 25% C, insuring decarburizing rate 0. 02% C/min, adding 0. 2% manganese iron before tapping, end [C] ≥0. 10% , adding ferro-aluminium or Si-Ba-Ca-Al by 3. 0 kg/1 for killing, diffusion-deoxidizing by adding 3 〜5 kg/t deoxidant during LF refining, (FeO) ≤0. 5% , and before casting with 0. 1 〜0. 3 MPa argon blowing ≥ 15 min, the ratio of qualified 20CrMnTiH steel products with first inclusion examination increased to 92. 49% from original 88. 35%.

Key words: 20CrMnTiH Gear Steel, Inclusion, Steelmaking Process