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

姚同路; 林平; 佟溥翘

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

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- Control of T[O] and Inclusion in Casing Pipe Steel for Petroleum during LF Refining
- Special Steel Vol. 30, Issue 2, Pages: 43-45(2009)
- 作者机构：
  
  钢铁研究总院冶金工艺研究所,北京,100081
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：20 September 2008，
  
  Online First：03 December 2022，
  
  Published：03 December 2009
- 稿件说明：
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姚同路, 林平, 佟溥翘. Control of T[O] and Inclusion in Casing Pipe Steel for Petroleum during LF Refining[J]. Special Steel, 2009, 30(2): 43-45.
DOI：

姚同路, 林平, 佟溥翘. Control of T[O] and Inclusion in Casing Pipe Steel for Petroleum during LF Refining[J]. Special Steel, 2009, 30(2): 43-45. DOI：

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)/(Al

)=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。

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)/(Al

) =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.

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