Process Practice of Bearing Steel G55SiMoVA Produced by 50 t EBT EAF-LF (VD)-CC Flow Sheet

杨密平

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Process Practice of Bearing Steel G55SiMoVA Produced by 50 t EBT EAF-LF (VD)-CC Flow Sheet

更新时间：2026-01-21

- Process Practice of Bearing Steel G55SiMoVA Produced by 50 t EBT EAF-LF (VD)-CC Flow Sheet
- Special Steel Vol. 35, Issue 2, Pages: 33-36(2014)
- 作者机构：
  
  山东钢铁股份有限公司莱芜分公司特钢事业部,莱芜,271105
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：09 October 2013，
  
  Online First：09 September 2022，
  
  Published：09 September 2014
- 稿件说明：
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杨密平. Process Practice of Bearing Steel G55SiMoVA Produced by 50 t EBT EAF-LF (VD)-CC Flow Sheet[J]. Special Steel, 2014, 35(2): 33-36.
DOI：

杨密平. Process Practice of Bearing Steel G55SiMoVA Produced by 50 t EBT EAF-LF (VD)-CC Flow Sheet[J]. Special Steel, 2014, 35(2): 33-36. DOI：

摘要

石油钻具用轴承钢G55SiMoVA(/%:0.52~0.55C

0.90~1.10Si

0.30~0.50Mn

0.40~0.60Mo

0.20~0.30V

≤0.015P

≤0.015S)的工艺流程为废钢+60%~70%铁水-50 t UHP EBT EAF-60 t LF-VD-260 mm×300 mm连铸。通过采用电弧炉全程泡沫渣埋弧操作

EBT出钢合金化

控制LF二次精炼渣(/%:46~54CaO

10~16SiO

11~13Al

4.5~7.0MgO)碱度3.2~4.5

SiC扩散脱氧和60~80 L/min流量氩气搅拌

VD 67 Pa真空状态下保持20 min

连铸全程保护浇铸

所生产G55SiMoVA轴承钢轧材中氧含量为9×10

-6

~10×10

-6

。

Abstract

The flow sheet for bearing steel G55SiMoVA for oil drilling tool (/% ： 0.52-0.55C

0.90-1.l0Si

0.30-0.50Mn

0.40-0.60Mo

0.20-0.30V

≤0.015P

≤0.015S) is scrap+60%-70% hot metal-50 t UHP EBT EAF-60 t LF-VD-260 mm x 300 mm CC process. With using foaming slag submerged arc operation in whole period of arc furnace steelmaking

EBT tapping and alloying

controlling basicity 3.2-4.5 of LF secondary refining slag (/% : 46-54CaO

10-16SiO

11-13Al

4.5-7.0MgO)

diffusion-deoxidizing by SiC with 60-80 L/min Argon stirring

VD for 20 min in vacuum below 67 Pa

and shielding casting in whole period

the oxygen content in bearing steel G55SiMoVA rolled products is 9 X 10

-6

-10 x 10

-6

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