Process Practice of Gear Steel 20CrMnTiH Production with 70 t LD-LF-CC Flow Sheet at Chengde Jianlong Steel

张志宏

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Process Practice of Gear Steel 20CrMnTiH Production with 70 t LD-LF-CC Flow Sheet at Chengde Jianlong Steel

更新时间：2026-01-21

- Process Practice of Gear Steel 20CrMnTiH Production with 70 t LD-LF-CC Flow Sheet at Chengde Jianlong Steel
- Special Steel Vol. 30, Issue 1, Pages: 46-47(2009)
- 作者机构：
  
  承德建龙钢铁有限公司设计管理处,承德,067201
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：03 July 2008，
  
  Online First：30 November 2022，
  
  Published：30 November 2009
- 稿件说明：
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张志宏. Process Practice of Gear Steel 20CrMnTiH Production with 70 t LD-LF-CC Flow Sheet at Chengde Jianlong Steel[J]. Special Steel, 2009, 30(1): 46-47.
DOI：

张志宏. Process Practice of Gear Steel 20CrMnTiH Production with 70 t LD-LF-CC Flow Sheet at Chengde Jianlong Steel[J]. Special Steel, 2009, 30(1): 46-47. DOI：

摘要

通过高拉碳等操作使LD终点[C

]

0.05%～0.13%

出钢前钢包底预加钢芯铝、硅锰和铝锰进行脱氧合金化;采用挡渣技术和全程吹氩

控制LF精炼渣碱度2.5～3.0

加铝线脱氧、控制钢水中Als 0.020%～0.045%

加Ti后T[O

]

≤20×10

-6

精炼末期喂硅钙线等工艺措施。该钢13炉分析、检验结果表明

该钢的成分(%)为: 0.17～0.22C、0.26～0.34Si、0.90～0.98Mn、1.08～1.13Cr、0.048～0.075Ti、0.015～0.021P、0.008～0.013S;钢材的氧含量≤20×10

-6

氮含量≤70×10

-6

和J

淬透带宽4 HRC

各项指标达到标准要求。

Abstract

Wilh llie technology operations such as catch carbon practice to get LD end [C

]

0. 05 ~0. 13. pre-adding aluininiuni cladding steel

silicon-manganese and aliiminiuni-manganese at bottom of ladle before tapping for deoxidization and alloying

using slag stopping leclinology and blowing argon in whole phase

controlling LF refining slag basicity 2. 5 ~ 3. 0

adding Al wire deoxidizing to control Als eonlrnt in liquid steel 0. 020% 〜0.045。

alter adding Ti the T[O

]

≤20 x 10 and feeding silieon-calcium wire in end refining period

the examination results of 13 heats of the steel showed that the analysis of strrl was 0. 17 〜0. 22C

0. 26 〜0

34Si

0. 90-0. 98Mn

1.08 - 1. 13Cr

0. 048 〜0.075Ti

0.015 〜0. 021P and 0. 008 ~0. 013S； the oxygen content in steel products ≤20 x 10

-6

nitrogen content ≤70 x 10

-6

the width of hardenability band for J

and J

was HRC 4 and each property index met the requirements of standard.

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