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

刘昭

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

更新时间：2026-01-21

- Practice of Process for Increasing Ratio of Qualified 20CrMnTiH Gear Steel Products with Non-metallic Inclusion Examination
- Special Steel Vol. 30, Issue 1, Pages: 48-49(2009)
- 作者机构：
  
  本溪钢铁集团公司特殊钢厂,本溪,117000
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：16 July 2008，
  
  Online First：30 November 2022，
  
  Published：30 November 2009
- 稿件说明：
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刘昭. Practice of Process for Increasing Ratio of Qualified 20CrMnTiH Gear Steel Products with Non-metallic Inclusion Examination[J]. Special Steel, 2009, 30(1): 48-49.
DOI：

刘昭. Practice of Process for Increasing Ratio of Qualified 20CrMnTiH Gear Steel Products with Non-metallic Inclusion Examination[J]. Special Steel, 2009, 30(1): 48-49. DOI：

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

钢

进行沉淀脱氧

LF加入3～5 kg/t

钢

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%。

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%.

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