Behavior of Variation of Oxide Inclusions in Bearing Steel GCrlS Steelmaking by 90t BOF-LF-VD Process

蒋晨旭; 岳峰; 刘建; 李瑛; 李彬; 马忠存

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Behavior of Variation of Oxide Inclusions in Bearing Steel GCrlS Steelmaking by 90t BOF-LF-VD Process

更新时间：2026-01-21

- Behavior of Variation of Oxide Inclusions in Bearing Steel GCrlS Steelmaking by 90t BOF-LF-VD Process
- Special Steel Vol. 37, Issue 1, Pages: 5-8(2016)
- 作者机构：
  
  1. 北京科技大学冶金工程研究院,北京,100083
  2. 东北特钢集团北满特殊钢有限责任公司,齐齐哈尔,161041
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：29 August 2015，
  
  Online First：16 August 2022，
  
  Published：16 August 2016
- 稿件说明：
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蒋晨旭, 岳峰, 刘建, et al. Behavior of Variation of Oxide Inclusions in Bearing Steel GCrlS Steelmaking by 90t BOF-LF-VD Process[J]. Special Steel, 2016, 37(1): 5-8.
DOI：

蒋晨旭, 岳峰, 刘建, et al. Behavior of Variation of Oxide Inclusions in Bearing Steel GCrlS Steelmaking by 90t BOF-LF-VD Process[J]. Special Steel, 2016, 37(1): 5-8. DOI：

摘要

GCr15钢的生产流程为90t转炉-LF-VD-250mm×280mm方坯连铸-轧制。转炉出钢加铝脱氧

LF由高碱度渣[/%:55~58CaO

3~10MgO

12~16SiO

16~24Al

≤1（MnO+FeO）

]

精炼

LF喂Al后T[O

]

为14×10

-6

LF终点T[O

]

10×10

-6

。采用SEM（扫描电镜）+EDS（能谱仪）的方法

研究了线材中超标DS类夹杂物的成分分布

发现夹杂物中心以复合氧化物CaO-MgO-Al

为主

外围包裹少量CaS;这些氧化物中

含量约占65%

分布最为均匀;CaO含量约占20%

MgO含量约占15%。统计分析结果表明

VD真空处理后每平方毫米13μm以上大颗粒夹杂物数量增至7

软吹后降至2.1

线材中1/3大颗粒夹杂物来源于钢包渣带入。

Abstract

The production flowsheet for steel GCrl5 is 90 t converter-LF-VD-250mm x280mm bloom casting-rolling process. With adding aluminium to deoxidize during converter tapping and refining by high basicity slag [/% : 55 〜 58CaO

3 ~ l0MgO

12~ 16SiO

16~24A1

≤ 1 (MnO + FeO)

]

the T[ 0

]

after feeding Al in LF process is 14 x 10

-6

and the T[O

]

at end of LF refining is 10 x 10

-6

. With using SEM (scanning electron microscope) and EDS ( energy dispersive spectroscope) to study the composition distribution of unqualified large DS series inclusions in rod products

it is found that at the center of inclusion the main composition is compound oxide CaO-MgO-Al

outside is wrapped by a small amount of CaS

in this oxides the A1

content is up to about 65% with even distribution

the CaO content is about 20% and the MgO content is about 15%. Statistics analysis results show that after VD vacuum treatment the number o£ diameter more than 13μm large inclusions per mm

increases to 7

after soft stirring that decreases to 2. 1

arid in rod products the one of three large inclusions come from ladle slag.

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