2018 №05 (01) DOI of Article
2018 №05 (03)

Automatic Welding 2018 #05
Avtomaticheskaya Svarka (Automatic Welding), # 5, 2018, pp. 9-14

Features of embrittlement of welded joints of operated steam pipelines

V.V. Dmitrik1, A.V. Glushko1, T.A. Syrenko2, S.G. Hryhorenko3

1NTU «KhPI». 2 Kirpicheva Str., 61002, Kharkov, Ukraine. Е-mail: svarka126@ukr.net
2Kharkov Machine Building College. 79 Plekhanovskaya Str., 61068, Kharkov, Ukraine.
3E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
The development of recovery in the metal of welded joints of steam pipelines of heat-resistant pearlitic steels, which are long operated in the creep conditions, is characterized by certain structural changes. Such changes provide embrittlement in the metal of welded joints. The article considers the features of structural and deformational changes, as well as the development of diffusion which occur in the process of recovery and leads to embrittlement in the metal of welded joints of steam pipelines, at their service of over 270 hors. h. 1 Ref., 7 Fig.
Keywords: welded joints of steam pipelines, recovery, structural state, embrittlement, dislocations, diffusion, heat-affected zone

Received: 15.03.2018
Published: 24.04.2018

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