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- Title
STRUCTURAL CHANGES IN METAL OF WELDED JOINTS OF STEAM PIPELINES IN OPERATION.
- Authors
DMITRIK, V. V.; SOBOL, O. V.; POGREBNOJ, M. A.; GLUSHKO, A. V.; ISHCHENKO, G. I.
- Abstract
Extension of service life of steam pipelines is a relevant task. Investigation of peculiarities of structural state in metal of welded joints of long-lasting operation steam pipelines allows evaluating a level of their damageability and grounding residual life. This study determined that structural changes of welded joints from 15Kh1M1F and 12Kh1MF steels are caused by diffusion processes, formation of intergranular segregations, carbide reactions, nucleation and propagation of creep pores. The ways are outlined for regulation of structural state of metal of HAZ areas, which are directed at reduction of structural inhomogeneity and extension of service life.
- Subjects
PIPELINES; SERVICE life; WELDED joints
- Publication
Paton Welding Journal, 2015, Issue 12, p24
- ISSN
0957-798X
- Publication type
Article
- DOI
10.15407/tpwj2015.12.05