Practice of Process for Bearing Steel GCr15 Produced by 100 t UHP EAF-LF(VD)-CC Flow Sheet at Nanjing Steel

刘立; 赵俊学; 崔雅茹; 李凯; 马征宇

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Practice of Process for Bearing Steel GCr15 Produced by 100 t UHP EAF-LF(VD)-CC Flow Sheet at Nanjing Steel

更新时间：2026-01-21

- Practice of Process for Bearing Steel GCr15 Produced by 100 t UHP EAF-LF(VD)-CC Flow Sheet at Nanjing Steel
- Special Steel Vol. 29, Issue 6, Pages: 39-40(2008)
- 作者机构：
  
  1. 西安建筑科技大学冶金工程学院,西安,710055
  2. 南京钢铁联合股份有限公司,南京,210035
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：16 May 2008，
  
  Online First：08 December 2022，
  
  Published：08 December 2008
- 稿件说明：
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刘立, 赵俊学, 崔雅茹, et al. Practice of Process for Bearing Steel GCr15 Produced by 100 t UHP EAF-LF(VD)-CC Flow Sheet at Nanjing Steel[J]. Special Steel, 2008, 29(6): 39-40.
DOI：

刘立, 赵俊学, 崔雅茹, et al. Practice of Process for Bearing Steel GCr15 Produced by 100 t UHP EAF-LF(VD)-CC Flow Sheet at Nanjing Steel[J]. Special Steel, 2008, 29(6): 39-40. DOI：

摘要

南京钢铁公司采用100 t高阻抗超高功率电弧炉-100 t钢包精炼炉-5流150 mm×150 mm方坯连铸-连轧工艺生产GCr15轴承钢。GCr15轴承钢生产结果统计表明

通过炉料中配入55%～70%铁水

电弧炉出钢时碳含量0.22%～0.24%、磷含量0.004%～0.006%、硫含量0.040%～0.043%;精炼渣成分(%):53～58CaO、13～16SiO

、15～20Al

、3～5MgO

碱度2.3～3.3;精炼时全程吹Ar搅拌

67 Pa VD处理≥20min

连铸全程保护浇铸

使真空处理后GCr15轴承钢平均氧含量为10×10

-6

铸坯中最低氧含量为7×10

-6

。

Abstract

Bearing steel GCr15 is produced by 100 t high impedance UHP EAF steelmaking - 100 t ladle furnace refining - 5 strand 150 mm×150 mm billet concasting - continuous rolling process at Nanjing lron and Steel Co Ltd. The statistic results of bearing steel CCr15 production data showed that with charging 55%～70% hot metal

controlling end point carbon 0.22%～0.24%

phosphorus 0.004%～0.006% and sulphur 0.040%～0.043% in liquid steel at EAF tapping

ladle refining by slag(%:53~58CaO

13～16SiO

15~20Al

3~5MgO)with basicity2.3~3.3 and whole period Ar stiring

67 Pa VD treating≥20 min

concasting with shiclding practice in whole period

the average oxygen con- tent in bearing steel CCr15 after VD treatment was 10×10

-6

and the lowest oxygen content in cast billet w

as 7×10

-6

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