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 ›› 2009, Vol. 30 ›› Issue (2): 43-45.

• 工艺技术 • 上一篇    下一篇

石油套管钢LF精炼过程T[O]和夹杂物的控制

姚同路,林平,佟溥翘   

  1. 钢铁研究总院冶金工艺研究所,北京 100081
  • 收稿日期:2008-09-20 出版日期:2009-04-01 发布日期:2022-12-03
  • 作者简介:姚同路(1982-),男,硕士研究生,2006年武汉科技大学毕业,二次精炼,夹杂物控制。

Control of T[O] and Inclusion in Casing Pipe Steel for Petroleum during LF Refining

Yao Tonglu , Lin Ping , Tong Puqiao   

  1. Metallurgical Process Institute, Central Iron and Steel Research Institute, Beijing 100081
  • Received:2008-09-20 Published:2009-04-01 Online:2022-12-03

摘要: 通过对100 t LF精炼37Mn5套管钢时1 540~1580℃钢水中稳定氧化物夹杂含量与T[O]的关系以及钢-渣平衡时渣碱度对钢中活性氧含量影响的分析,提出降低钢中T[O]和夹杂物含量的改进工艺措施。热力学计算和试验结果表明,当[Al]s为0.03%~0.04%,精炼渣碱度为3,(CaO)/(Al2O3)=3~3.5时,37Mn5钢中的氧含量降到10×10-6,管材基本消除了粗系夹杂,细系夹杂A+B+C+D≤5.0级,达到使用要求。

关键词: 石油套管, LF精炼, T[O], 夹杂物

Abstract: The improved process to decrease T[O] and inclusion content in steel was proposed by analysis on relation between T[O] and stable oxide inclusion content in liquid casing pipe steel 37Mn5 at 1 540 ~ 1 580 ℃ during 100 t LF refining and effect of slag basicity on active oxygen in steel in steel-slag equilibrium state. The thermodynamic calculation and test results showed that [Al] s was 0.03%-0.04% and refining slag basicity was 3 with (CaO)/(Al2O3) =3~3.5, the oxygen content in steel 37Mn5 decreased to 10 x 10-6, no heavy-series inclusion occurred in pipe products, and fine-series inclusion rating A + B + C + D ≤ 5 to meet the requirement of service.

Key words: Casting Pipe for Petroleum, LF Refining, T[O], Inclusions