Cleanliness of Steel 26CrMoNbTiB for Drill Pipe Produced by EAF-LF (VD) -HCC Flow Sheet

刘剑辉; 朱荣; 易操; 肖鸿光; 彭自胜; 钟春生; 孙群保

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Cleanliness of Steel 26CrMoNbTiB for Drill Pipe Produced by EAF-LF (VD) -HCC Flow Sheet

更新时间：2026-01-21

- Cleanliness of Steel 26CrMoNbTiB for Drill Pipe Produced by EAF-LF (VD) -HCC Flow Sheet
- Special Steel Vol. 31, Issue 1, Pages: 40-42(2010)
- 作者机构：
  
  1. 北京科技大学冶金与生态工程学院,北京,100083
  2. 湖南衡阳钢管(集团)有限公司,衡阳,421001
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：03 August 2009，
  
  Online First：26 October 2022，
  
  Published：26 October 2010
- 稿件说明：
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刘剑辉, 朱荣, 易操, et al. Cleanliness of Steel 26CrMoNbTiB for Drill Pipe Produced by EAF-LF (VD) -HCC Flow Sheet[J]. Special Steel, 2010, 31(1): 40-42.
DOI：

刘剑辉, 朱荣, 易操, et al. Cleanliness of Steel 26CrMoNbTiB for Drill Pipe Produced by EAF-LF (VD) -HCC Flow Sheet[J]. Special Steel, 2010, 31(1): 40-42. DOI：

摘要

26CrMoNbTiB钢由45 t EAF-LF(VD)-Φ80～180mm管坯HCC流程冶炼。该钢各工序的洁净度试验结果表明

LF-VD后钢中氧含量为(8～18)×10

-6

平均夹杂物数量最低为2.31个/mm

连铸坯平均夹杂物数量为3.66个/mm

≥50μm大型夹杂物平均含量为4.08 mg/10 kg。加强钢包到中间包长水口的密封保护和采用钢包下渣检测装置

提高中间包容量和采用挡渣墙是进一步提高铸坯洁净度的关键工艺措施。

Abstract

Steel 26CrMoNbTiB is melted by 45 t EAF-LF ( VD) -Φ80 〜180 mm tube billet HCC flow sheet. Test results of cleanliness of the steel at each melting process showed that the oxygen content in steel after LF-VD is (8 ~ 18) x 10

-6

with lowest average inclusion amount i. e. 2. 31 inclusions/mm

and that is 3. 66 inclusions/mm

in casting billet and the average content of ≥50μm micro inclusions in billet is 4. 08 mg/10 kg. To tighten the sealed shield of long nozzle from ladle to tundish

use monitoring instrument for ladle slagging out

increase tundish capacity and use dam in tundish are the key process measures to further improve cleanliness of billet。

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