TPWJ, 2020, #12, 27-33 pages
Development of remotely-controlled equipment and technology for laser welding repair and restoration of performance of NPP steam generators
V.D. Shelyagin, A.V. Bernadskyi, O.V. Siora, V.A. Kurylo and O.M. Suchek
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: email@example.com
Control straight butt joints of 10Kh18N10T and 10Kh17N13M3T steel blanks were welded in the vertical position
with incomplete penetration by the thickness. Visual and radiographic examination, and metallographic investigations
were performed, and welded joint microhardness was determined. Parameters of technological welding modes of the
studied circumferential welded joints were established. Conditions of compliance with quality category «high B» of
DSTU EN ISO 13919–1:2015 standard were the criterion for selection of appropriate parameters of the modes of laser
welding of circumferential butt joints. As a result of work performance, it is shown that the point of welding start
influences the dimensions of the weld section, in which the welding process is stabilized, and specified penetration
depth is achieved. The techniques developed by the authors were verified on simulator-samples during pilot testing of
the model of remotely-controlled equipment developed for repair and restoration of performance of PGV-1000М type
steam generators. 18 Ref., 2 Tables, 9 Figures.
repair of NPP steam generator, heat-exchanger tubes, laser welding, technology, equipment
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