Effect of 120 t LF ReHning Slag System on Plasticity Inclusions in 55SiCrA Spring Steel

Wang Qingbo; Zhang Hua; Li Yongchao; Lu Cailing; Bai Ruijuan; Liu Chengsong

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Effect of 120 t LF ReHning Slag System on Plasticity Inclusions in 55SiCrA Spring Steel

更新时间：2025-10-28

- Effect of 120 t LF ReHning Slag System on Plasticity Inclusions in 55SiCrA Spring Steel
- Special Steel Vol. 43, Issue 1, Pages: 34-38(2022)
- 作者机构：
  
  1. 武汉科技大学材料与冶金学院,武汉,430081
  2. 河南济源钢铁(集团) 有限公司,济源,459000
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：28 May 2021，
  
  Online First：18 March 2022，
  
  Published：18 March 2022
- 稿件说明：
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Wang Qingbo, Zhang Hua, Li Yongchao, et al. Effect of 120 t LF ReHning Slag System on Plasticity Inclusions in 55SiCrA Spring Steel[J]. Special Steel, 2022, 43(1): 34-38.
DOI：

Wang Qingbo, Zhang Hua, Li Yongchao, et al. Effect of 120 t LF ReHning Slag System on Plasticity Inclusions in 55SiCrA Spring Steel[J]. Special Steel, 2022, 43(1): 34-38. DOI：

摘要

在分析"120 t LD→LF→RH→150 mm×150 mm连铸坯→线材轧制"工艺流程生产的弹簧钢55SiCrA的基础上

应用Factsage热力学计算软件进行热力学计算

对精炼工艺进行优化研究。结果表明:精炼渣系中含SiO

41%～46%、CaO 36%～41%、Al

0%～3%、MgO 10%

渣碱度0.8～1.0

可使CaO-SiO

-Al

系夹杂物成为塑性夹杂物。使用低Ti、低Al合金及无铝耐材

冶炼终点[Al

]

降至0.001 8%～0.002 2%

[Ti

]

降至0.001 0%～0.001 2%

钢中铝镁尖晶石和Ti N等不变形夹杂物明显降低

夹杂物中Al

含量降至15%左右

夹杂物成分全部位于低熔点区。

Abstract

Based on the analysis of 55SiCrA spring steel produced by "120 t LD → LF→ RH →150 mm x 150 mm continuous casting billet → wire rolling” process

the thermodynamic calculation is carried out by using Factage thermodynamic calculation software to optimize the refining process. The results show that the inclusions in CaO-SiO

-Al

system can be transformed into plastic inclusions with the content of SiO

41% ~ 46%

CaO 36% ～ 41%

0% ~3%

MgO 10% refining slag and slag basicity 0. 8～1. 0. Using low Ti

Al alloy and non-aluminum refractory material

the smelting end [Al

]

reduces to 0.0018% ~ 0. 0022%

[Ti

]

reduces to 0.001 0% ~ 0. 001 2%

the undeformed inclusions such as aluminum magnesium

spinel and TiN in the steel are obviously reduced

the content of Al2O3 in the inclusions is reduced to about 15%. The inclusion ingredient are all located in the low melting point region.

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