Structural and Mechanical Degradation of 09Mn2Si Pipe Steel after Long-Term Operation

被引:0
作者
Panin, S. V. [1 ,2 ]
Marushchak, P. O. [3 ]
Vlasov, I. V. [1 ,2 ]
Eremin, A. V. [1 ,2 ]
Byakov, A. V. [1 ,2 ]
Syromyatnikova, A. S. [4 ,5 ]
Stankevich, R. [2 ]
机构
[1] Inst Strength Phys & Mat Sci SB RAS, Tomsk 634055, Russia
[2] Natl Res Tomsk Polytech Univ, Tomsk 634050, Russia
[3] Ternopil Ivan Pului Natl Tech Univ, UA-46001 Ternopol, Ukraine
[4] North Eastern Fed Univ, Yakutsk 677027, Republic Of Sak, Russia
[5] Larionov Inst Physical Tech Problems North SB RAS, Yakutsk 677891, Russia
来源
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2017 (AMHS'17) | 2017年 / 1909卷
基金
俄罗斯基础研究基金会;
关键词
PIPELINES;
D O I
10.1063/1.5013848
中图分类号
O59 [应用物理学];
学科分类号
摘要
A comprehensive study of the structure and impact toughness of 09Mn2Si steel used in the construction of the main gas pipeline "Mastakh-Berge-Yakutsk" (taken from the linear part with the outer diameter of 530 mm and the wall thickness of 7 mm) after 37 years of operation was carried out. A comparative analysis of results obtained for the emergency stock steel was conducted. It was shown that long-term operation does not give rise to a substantial redistribution of cementite. Deformation aging is slightly expressed and is manifested through precipitation of finely dispersed carbides in the grain bulk. The revealed structure degradation almost does not make sense under hardness measurement. The most pronounced manifestation of structure changes is related to decreasing impact toughness of 09Mn2Si steel which reaches similar to 2 times under negative temperatures.
引用
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页数:4
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