A Study on Thermodynamics and Control Technology of Calcium Treatment for Gear Steel 20CrMnTiHl Containing Sulfur

林平; 刘浏; 王福利; 贺庆

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A Study on Thermodynamics and Control Technology of Calcium Treatment for Gear Steel 20CrMnTiHl Containing Sulfur

更新时间：2026-01-21

- A Study on Thermodynamics and Control Technology of Calcium Treatment for Gear Steel 20CrMnTiHl Containing Sulfur
- Special Steel Vol. 31, Issue 2, Pages: 1-4(2010)
- 作者机构：
  
  1. 东北大学流程工业综合自动化教育部重点实验室,沈阳,110004
  2. 钢铁研究总院冶金工艺研究所,北京,100081
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：20 October 2009，
  
  Online First：15 November 2022，
  
  Published：15 November 2010
- 稿件说明：
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林平, 刘浏, 王福利, et al. A Study on Thermodynamics and Control Technology of Calcium Treatment for Gear Steel 20CrMnTiHl Containing Sulfur[J]. Special Steel, 2010, 31(2): 1-4.
DOI：

林平, 刘浏, 王福利, et al. A Study on Thermodynamics and Control Technology of Calcium Treatment for Gear Steel 20CrMnTiHl Containing Sulfur[J]. Special Steel, 2010, 31(2): 1-4. DOI：

摘要

通过钢液与夹杂物之间的热力学平衡计算

研究了20CrMnTiH1精炼钢水中Al

夹杂物钙处理后可能变性的程度和CaS夹杂生成条件。计算结果表明

]

0.020%～0.035%、[Al

]

0.02%～0.04%的钢水进行钙处理时易生成稳定的CaS

并且铝脱氧的产物Al

难以完全变性成低熔点钙铝酸盐12(CaO)·7(Al2O3)。为使Al

完全变性成低熔点(CaO)·(Al

)和12(CaO)·7(Al

)钙铝酸盐

在精炼过程应在低[S

]

和温度≥1600℃情况下对钢水进行钙处理

软吹氩搅拌后进行喂硫线操作

同时可以显著减少水口堵塞的发生。

Abstract

The extent of modification of Al

inclusion and factor of CaS inclusion formation in refining liquid of steel 20CrMnTiHl after calcium treatment have been studied by thermodynamics equilibrium calculation between liquid steel and inclusions. Calculated results show that with calcium treatment of liquid steel containing 0. 020% ~ 0. 035% [S

]

and 0. 02% 〜0. 04% [ Al

]

the stable CaS forms easily and the aluminum deoxidizing product Al

is not easily modified to low-melting calcium aluminate 12( CaO)

7( Al

). In order to completely modify the Al

to low-melting calcium aluminate (CaO) • ( Al

) and 12( CaO) *7( Al

)

in refining process the calcium treatment of liquid steel should carry out in conditions of low [S

]

and ≥1 600℃

and the sulfur wire feeding operation carries out after soft argon stirring

it is available to obviously decrease the occurrence of nozzle blocking.

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