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

The Paton Welding Journal 2018 #05
The Paton Welding Journal, 2018, #5, 7-11 pages

Peculiarities of welded joints weakening in operating steam pipelines

V.V. Dmitrik1, A.V. Glushko1, T.A. Syrenko2 and S.G. Grigorenko3

1NTU «KhPI» 2 Kirpicheva Str., 61002, Kharkov, Ukraine. Е-mail: 2Kharkiv Machine Building College 79 Plekhanovskaya Str., 61068, Kharkiv, Ukraine 3E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail:
The development of recovery in metal of welded joints of heat-resistant pearlitic steel steam pipelines, which are operating for a long time in the creep conditions, is characterized by certain structural changes. Such changes cause the weakening in metal of welded joints. The article considers the peculiar features of structural and deformational changes, as well as the development of diffusion which occur in the process of recovery and leads to weakening in metal of welded joints of steam pipelines at their service of over 270 thou h. 10 Ref., 7 Figures.
Keywords: welded joints of steam pipelines, recovery, structural state, weakening, dislocations, diffusion, heat-affected zone
Received:                15.03.18
Published:               07.05.18

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2. Dmitrik, V.V. (2000) Structure of welded joints from low-alloyed heat-resistant Cr–Mo–V pearlitic steels. Ibid., 4, 26–29.
3. Dmitrik, V.V., Syrenko, T.A. (2012) To the mechanism of diffusion of chromium and molybdenum in the metal of welded joints of steam pipelines. Ibid., 10, 20–24.
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6. Dmitrik, V.V., Glushko, A.V., Grigorenko, S.G. (2016) Features of pore formation in welded joints of steam lines in long-term operation. Ibid., 9, 51–54.
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