ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2010, Vol. 31 ›› Issue (1): 40-42.

• 工艺技术 • 上一篇    下一篇

EAF-LF (VD) -HCC流程生产钻杆管用钢26CrMoNbTiB的洁净度

刘剑辉1, 朱荣1, 易操1, 肖鸿光2, 彭自胜2, 钟春生2, 孙群保2   

  1. 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
  • 收稿日期:2009-08-03 出版日期:2010-02-01 发布日期:2022-10-26
  • 作者简介:刘剑辉(1973-),男,博士研究生,特殊钢的理论和冶炼工艺研究。

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

Liu Jianhui1 ,  Zhu Rong1 ,  Yi Cao1 ,  Xiao Hongguang2,  Peng Zisheng2,  Zhong Cunsheng2, Sun Qunbao2   

  1. 1 Metallurgical and Ecological Engineering School, University of Science and Technology, Beijing 100083 ;
    2 Hunan Hengyang Steel Tube ( Group) Co Ltd, Hengyang 421001
  • Received:2009-08-03 Published:2010-02-01 Online:2022-10-26

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/mm2,连铸坯平均夹杂物数量为3.66个/mm2,≥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。

关键词: 钻杆管用钢26CrMoNbTiB, EAF-LF(VD)-HCC, 洁净度

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/mmand 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。