Avtomaticheskaya Svarka (Automatic Welding), #11, 2020, pp. 27-31
Development of the technology of reconditioning the sealing element of nozzle blades from difficult-to-weld high-temperature nickel alloy of ZHS6 type by microplasma powder surfacing
K.A. Yushchenko, O.V. Yarovitsin, O.O. Nakonechniy, I.R. Volosatov, O.O. Fomakin, G.D. Khrushchov
E.O. Paton Electric Welding Institute of the NAS of Ukraine.
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: email@example.com
In order to ensure the technological strength at reconditioning of the side sealing element of a sector of nozzle blades from
ZhS6K alloy with the required deposition volume of 7…13 cm3, a less heat-resistant material with sufficient deformability was
selected. At microplasma powder surfacing it is characterized by the following level of values of short-time strength relative to
the deposited metal ZhS6K: at 20 °С – 0.7…0.8; at 1000 °С – 0.5…0.55. Compared to the known technological solutions based
on filler materials of ІN625 type, it allowed increasing the level of deposited metal high-temperature strength by practically 2
times at 1000 °С at effective limitation of high-temperature ductility ε1000 °С ≤ 1.0…1.5 %. Proceeding from the described
materials science studies, PWI developed a new repair technology of microplasma powder surfacing that has successfully passed
experimental-practical trials at SE «Lutsk Repair Plant «Motor». 10 Ref., 2 Tabl., 5 Fig.
high-temperature nickel alloy ZhS6K, microplasma powder spraying of 7…13 cm3 volume, deformability,
technological strength, short-time strength values, repair technology
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6. Yushchenko, K.A., Yarovitsyn, A.V., Chervyakov, N.O. (2017) Effect of energy parameters of microplasma powder surfacing modes on susceptibility of nickel alloy ZhS32 to crack formation. The Paton Welding J., 2, 2-6. https://doi.org/10.15407/as2017.02.01
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