Avtomaticheskaya Svarka (Automatic Welding), #12, 2020, pp. 30-36
Development of remotely-controlled equipment and technology for laser welding and restoration of performance of NPS steam generators
V.D. Shelyagin, A.V. Bernatskyi, O.V. Siora, V.A. Kurilo, 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 experimental-industrial trials of the prototype of remotely-controlled equipment developed for repair
and restoration of performance of PGV-1000М type steam generators. 18 Ref., 2 Tabl., 9 Fig.
repair of NPS generators, heat-exchanger tubes, laser welding, technology, equipment
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