2018 №10 (03) DOI of Article
2018 №10 (05)

The Paton Welding Journal 2018 #10
The Paton Welding Journal, 2018, #10, 22-25 pages

Peculiarities of technology of repair welding of hpp turbounits after long-term operation

V.P. Elagin1, A.K. Tsaryuk1, N.I. Dunaevska2 and V.A. Peretyatko3

1E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail:
2Coal Energy Technology Institute of the NAS of Ukraine 19 Andriivska Str., 04070, Kyiv, Ukraine. E-mail:
3PJSC SEC «Centrenergo» 120/4e, Kazatska Str., 03680, Kyiv, Ukraine. E-mail:

Long-term operation of turbine equipment promotes formation of cracks in the casings of valves, cylinders and steam lines under effect of various factors. Their appearance is caused to the significant extent by deterioration of structure and mechanical properties of metal. Aim of the work is the analysis of possibility to take into account the state of metal in a damaged part in the technology of repair welding for providing a reliable operation of welded joint. Review of literature showed that modem technologies of repair welding envisage technological measures for prevention of cold crack formation, but do not account for deterioration of base metal state and its effect on workability of the welded joint. Removal of damages in turbine equipment components after long-term operation require development of new technologies of repair welding using additional technological measures of thermal and deformation influence. 24 Ref., 1 Table, 2 Figures
Keywords: components of turbine equipment, cracks, heat-resistant steel, structure, metal state, welding repair technology, technological measures
Received:                02.10.18
Published:               18.12.18

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