Process Practice on Improving Metallurgical Quality of Gear Steel 20CrMnTiH

杜东福; 赵喜庆; 张建元; 田景林; 贾文军

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Process Practice on Improving Metallurgical Quality of Gear Steel 20CrMnTiH

更新时间：2026-01-21

- Process Practice on Improving Metallurgical Quality of Gear Steel 20CrMnTiH
- Special Steel Vol. 39, Issue 2, Pages: 34-37(2018)
- 作者机构：
  
  凌源钢铁股份有限公司技术中心，凌源,122500
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：16 November 2017，
  
  Online First：30 June 2022，
  
  Published：30 June 2018
- 稿件说明：
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杜东福, 赵喜庆, 张建元, et al. Process Practice on Improving Metallurgical Quality of Gear Steel 20CrMnTiH[J]. Special Steel, 2018, 39(2): 34-37.
DOI：

杜东福, 赵喜庆, 张建元, et al. Process Practice on Improving Metallurgical Quality of Gear Steel 20CrMnTiH[J]. Special Steel, 2018, 39(2): 34-37. DOI：

摘要

20CrMnTiH齿轮钢（/%:0.17~0.23C

0.80~1.20Mn

0.17~0.37Si

1.00~1.45Cr

0.04~0.10Ti

≤0.035S

≤0.030P

≤0.0020O）的工艺流程为脱硫铁水-120t BOF-LF-160mm×160mm坯连铸-轧制Φ20~45mm材。通过目标控制LF精炼渣碱度4.0~8.0

渣中（FeO）≤0.75%

[Als]0.020%~0.035%

LF白渣时间≥30 min等并经过Ca处理和吹氩搅拌等工艺措施

145炉分析结果表明

T[O]为0.0006%~0.0018%

158炉统计结果得出

当Ca/Als=0.10~0.14时

钢中非金属夹杂物A、B、C细系≤2.0级

粗系≤1.5级

Ds类≤1.0级

20CrMnTiH齿轮钢的冶金质量显著提高。

Abstract

The process flowsheet of gear steel 20CrMnTiH (/%: 0.17~0.23C

0.80~1.20Mn

0.17~0.37Si

1.00~1.45Cr

0.04~0.10Ti

≤0.035S

≤0.030P

≤0

0020O) is desulphurized metal-120t BOF-LF-160mmx160mm billet casting- rolling to Φ20~45mm products. With process measures including aim controlling LF refining slag basicity 4.0~8.0

( FeO) in slag ≤0.75%

[ Als] 0.020%~0.035%

LF white slag time ≥30min

calcium treatment and argon stirring

the 145 heats analysis results show that T[O] in steel is 0.0006%~0.0018%

and the 158 heats statistic results obtains that as Ca/Als =0.10~0.14

the rating of A

B and C thin series inclusions in steel is ≤2 and that of rating of heavy series is ≤1.5

and the rating of Ds series inclusion in steel is ≤1.0

the metallurgical quality of gear steel 20CrMnTiH improves markedly.

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