Automatic Welding, 2023, №11



2023 №11 (07)

DOI of Article 10.37434/as2023.11.08

2023 №11 (09)

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Avtomaticheskaya Svarka (Automatic Welding), #11, 2023, pp. 71-75

Reconditioning repair of steam turbine blades using additive technology

O.V. Makhnenko, G.Yu. Saprykina, O.M. Savytska, M.S. Ananchenko

E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

It is rational to use additive technology to perform repair of critical structural elements, which include titanium alloy blades of powerful steam turbines, which is due to high requirements to product quality, namely the need to ensure the required microstructure and mechanical properties of blade material, as well as a low level of the residual stress-strain state and oxidation of material surface. Application of mathematical modeling methods based on computer technologies allows reduction of the scope of experimental studies and ensuring the required quality of repair, which guarantees a certain reliability and serviceability of the blades after repair. 7 Ref., 7 Fig.
Keywords: steam turbine, blade, titanium alloy, reconditioning repair, additive technology, electron beam surfacing, computational prediction


Received: 20.10.2023

References

1. Torop, V.M., Makhnenko, O.V., Saprykina, G.Yu., Gopkalo, E.E. (2018) Results of studying the causes for cracking in titanium alloy blades of steam turbines of K-1000-60/3000 type. Tekh. Diagnost. ta Neruiniv. Kontrol, 2, 3-15. https://doi.org/10.15407/tdnk2018.02.01
2. Kanel, G.I., Razorenov, S.V., Fortov, V.E. (2004) Shok-Wave phenomena and the properties of condensed matter. New-York, Berlin, Heidelberg, Hong Kong, London, Milan, Paris, Tokyo: Springer. https://doi.org/10.1007/978-1-4757-4282-4
3. (2004) SО 153-34.17.462-2003 Control by etching method blades of TS5 alloy after removal of erosion wear. Instruction. Moscow, Minenergo RF [in Russian].
4. Bilous, V.A., Voevodin, V.M., Khoroshikh, V.M. et al. (2016) Development of experimental equipment and main technological procedures for producing cavitation-resistant coatings on working surfaces of blades of steam turbines from titanium alloy VT6 for replacement of similar imported products. Nauka ta Innovatsii, 12(4), 27-37. https://doi.org/10.15407/scin12.04.027
5. Makhnenko, O.V., Milenin, A.S., Velikoivanenko, E.A. et al. (2017) Modelling of temperature fields and stress-strain state of small 3D sample in its layer-by-layer forming. The Paton Welding J., 3, 7-14. https://doi.org/10.15407/tpwj2017.03.02
6. Makhnenko, O.V., Ananchenko, N.S., Kandala, S.M. et al. (2018) Prediction of structure and mechanical properties of VT6 titanium alloy at layer-by-layer formation of 3D products using additive technology of electron beam surfacing. Mechanics and Advanced Technologies, 3(84), 5-14. https://doi.org/10.20535/2521-1943.2018.84.144127
7. Makhnenko, O.V., Milenin, A.S., Velikoivanenko, E.A. et al. (2018) Prediction of kinetics peculiarities of thermodeformational state of compacts specimens of different geometry at their layer-by-layer formation in equipment xBeam 3D Metal Printer. In: Proc. of 9th Int. Conf. on Mathematical Modeling and Information Technologies in Welding and Related Processes, 68-76.

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