Influence of Refining Slag on Oxygen Content and Inclusions in Bearing Steel

阮小江; 姜周华; 龚伟; 李阳; 李京社

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Influence of Refining Slag on Oxygen Content and Inclusions in Bearing Steel

更新时间：2026-01-21

- Influence of Refining Slag on Oxygen Content and Inclusions in Bearing Steel
- Special Steel Vol. 29, Issue 5, Pages: 1-3(2008)
- 作者机构：
  
  1. 北京科技大学冶金与生态工程学院,北京,100083
  2. 江阴兴澄特种钢铁有限公司，江阴,214400
  3. 东北大学材料与冶金学院,沈阳,110004
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：13 March 2008，
  
  Online First：23 December 2022，
  
  Published：23 December 2008
- 稿件说明：
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阮小江, 姜周华, 龚伟, et al. Influence of Refining Slag on Oxygen Content and Inclusions in Bearing Steel[J]. Special Steel, 2008, 29(5): 1-3.
DOI：

阮小江, 姜周华, 龚伟, et al. Influence of Refining Slag on Oxygen Content and Inclusions in Bearing Steel[J]. Special Steel, 2008, 29(5): 1-3. DOI：

摘要

采用MoSi

电阻炉在MgO质坩埚内进行了精炼渣成分(%:47～64CaO、13～23SiO

、15～25Al

、5～10MgO、0～8CaF

CaO/SiO

=2.0～4.5)对0.95%C-1.50%Cr GCr15轴承钢中氧含量和夹杂物的影响的实验研究。实验中发现

随精炼渣碱度CaO/SiO

由2增加至4.5

钢液中的终点全氧含量由20×10

-6

降至11×10

-6

夹杂物的总数量、总面积和平均半径减小。适当提高Al

含量或添加CaF

减少MgO含量

可以显著提高炉渣吸附夹杂物的速度和能力。低碱度渣精炼的钢液中夹杂物成分含有≥20%SiO

塑性较好

夹杂物的尺寸为15～20μm。高碱度渣精炼的钢液中典型的夹杂物是氧化铝和铝镁尖晶石等脆性夹杂物

尺寸≤5μm。

Abstract

The infuence of ingredient of refining slag(47～64CaO

13～23SiO

15～25Al

5～10MgO

0~ 8CaF

CaO/SiO

=2.0~4.5) on oxygen content and inclusions in 0.95C-1.50Cr CCr15 bearing steel has been tested and studied by MoSi

electrical resistance furnace with MgO crucible. It was found in test that with increased refining slag basicity CaO/SiO

from 2 to 4.5

the end total oxygen content in liquid steel decreased from 20×10

-6

to 11×10

-6

and the total amount

total area and average size of inclusions in steel decreased; the speed and capability of refining slag to absorb inclusions could remarkably increase with increasing Al2O3 con

tent or adding CaF

decreasing MgO content in slag; with low basicity refining slag

the size of inclusions in liquid steel

which contained ≥20% SiO

was 15～20 μm with quite good plasticity; and with high basicity slag the typical inclusions in liquid steel were brittle inclusions such as alumina and MgO-Al

spinel

of which the size was ≤5 μm.

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