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

Automatic Welding 2018 #10
Avtomaticheskaya Svarka (Automatic Welding), #10, 2018, с. 27-31

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

Elagin V. P.1, Tsaryuk A. K.1, Dunaevska N. I.2 and Peretyatko V. A.3

1 E.O. Paton Electric Welding Institute of the NAS of Ukraine, 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
2 Coal Energy Technology Institute of the NAS of Ukraine, 19 Andriivska str., Kyiv, 04070. E-mail:ilv.golenko@gmail.com
3 PJSC SEC «Centrenergo». 120/4 e, Kazatskaya Str., Kyiv, 03680. E-mail: peretyatkovladimir@urk.net

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 to significant extent is caused by deterioration of structure and mechanical properties of metal. Aim of the work is the analysis of possibility to take into account a state of metal in damaged part in a technology of repair welding for providing a reliable operation of welded joint. Review of literature showed that modern technologies of repair welding provide technological measures for prevention of “cold” crack formation, but do not consider deterioration of base metal state and its effect on working capacity 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 Tabl., 2 Fig.
Keywords: Components of turbine equipment, cracks, heat-resistant steel, structure, metal state, welding repair technology, technological measures

Received: 02.10.2018
Published: 25.10.2018

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