A Study on High Grade Pipeline Steel Treated by Magnesium

李太全; 包燕平; 吴华杰; 安航

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A Study on High Grade Pipeline Steel Treated by Magnesium

更新时间：2026-01-21

- A Study on High Grade Pipeline Steel Treated by Magnesium
- Special Steel Vol. 30, Issue 2, Pages: 4-6(2009)
- 作者机构：
  
  北京科技大学冶金与生态工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：23 September 2008，
  
  Online First：28 November 2022，
  
  Published：28 November 2009
- 稿件说明：
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李太全, 包燕平, 吴华杰, et al. A Study on High Grade Pipeline Steel Treated by Magnesium[J]. Special Steel, 2009, 30(2): 4-6.
DOI：

李太全, 包燕平, 吴华杰, et al. A Study on High Grade Pipeline Steel Treated by Magnesium[J]. Special Steel, 2009, 30(2): 4-6. DOI：

摘要

运用热力学计算了氧化镁及其复合夹杂物在X80管线钢液中的析出条件

即1873 K时以管线钢酸溶铝目标含量0.025%计算

当0.000 8%≤[Mg

]

≤0.005 9%

钢中生成MgO·Al

夹杂物

当[Mg

]

>0.0059%

钢中将有MgO生成。[Ti

]

为0.015%时

[Mg

]

=0.001 4%可生成2MgO·TiO

复合夹杂

同时0.025%≤[Al

]

≤0.047%时生成A1

·TiO

复合夹杂物。50kg真空感应炉熔炼的管线钢经SEM和EDS分析表明

镁处理钢中的夹杂物小于2μm占85%

2～5μm的占14.5%

5～10μm的夹杂物仅有0.5%。用微镁处理的管线钢的脱氧产物为2MgO·TiO

、MgO·Al

等

这些脱氧产物还会和硫化物、氮化物形成复合夹杂物。

Abstract

Precipitation conditions of magnesium oxide and its compounded inclusions in liquid in X80 pipeline steel was calculated by thermodynamics

that were calculating according to aim acid-soluble aluminium content 0.025% in pipe-line steel at 1873 K

as 0.0008%≤[Mg

]

≤0.0059%

the compounded inclusion MgO ·Al

formed in steel

and as [Mg

]

≤ 0.0059%

the MgO should formed in steel.With[Ti

]

0.015%

as [Mg

]

=0.0014%

the compounded inclusion 2MgO ·TiO

formed

and as 0.025% ≤ [Al

]

≤0.047%

the compounded inclusion Al

·TiO

formed in steel.The analysis on pipeline steel melted with 50 kg vacuum induction furnace by SEM and EDS showed that in steel treated by magnesium the percentage of inclusion less than 2 μm was 85%

2~5 μm wa

s 14.5% and 5～10 um was only 0.5%. The deoxidation products in pipeline steel treated by magnesium were 2MgO ·TiO

MgO ·Al

etc

which could be combined with sulfide and nitride to form compounded inclusions.

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