Automatic Welding, 2023, №04



2023 №04 (05)

DOI of Article 10.37434/as2023.04.06

2023 №04 (07)

---

Avtomaticheskaya Svarka (Automatic Welding), #4, 2023, pp. 35-40

Use of electron beam welding for manufacture of blade packages for cogeneration steam turbines

Yu.V. Orsa, V.M. Nesterenkov, V.I. Zagornikov, M.O. Rusynyk

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

Industrial technology for manufacturing blade packages of steam turbines from heat-resistant high-alloy steel of martensitic grade 18Kh11MNFB-Sh was offered. A technological process was introduced into the experimental production, which allowed solving the problem of welding blade packages of 120 mm thickness. The technological equipment was developed required for positioning package parts in the process of assembly and welding. The results of experimental studies of weldability of heatresistant steel of martensitic grade by electron beam were presented. It was established that preheating of blade packages up to 200…250 °C using the defocused electron beam in the vacuum chamber allows obtaining higher ductile properties of welded joints. The required parameters of heat treatment modes after welding were indicated in order to remove inner stresses and provide the necessary mechanical properties of a product. 9 Ref., 1 Tabl., 9 Fig.
Keywords: blade package, heat-resistant steel, electron beam welding, heat treatment


Received: 20.04.2023

References

1. Kheifets, M.L., Borodavko, V.I., Pynkin, A.M. et al. (2018) Technological process of electron beam welding of steam turbine blade package. Naukoyomkie Tekhnologii v Mashinostroenii, 3, 9-13 [in Russian]. https://doi.org/10.12737/article_5a8ef9cb7d0fc9.83528290
2. Shorshorov, M.Kh. (1965) Physical metallurgy of welding of steels and titanium alloys. Moscow, Nauka [in Ruaaian].
3. Borodavko, V.I., Vabishchevich, P.A., Gretskyi, N.L. et al. (2017) Application of electron beam welding in producing of steam turbine blade package. Inzhener-Mekhanik, 2(75), 27–30 [in Russian].
4. Nesterenkov, V.M, Nazarenko, O.K., Akopyants, K.S. (1998) Closing of circumferential welds of thick steels. In: 6-th Іnt. Сonf. on Welding and Melting by Electron and Laser Beams, Cisffel 6 (France, Toulon, 15–19 June 1998), 623–630.
5. Nesterenkov, V.M., Kravchuk, L.A. (1981) Selection of parameters of circular beam rotation. Avtomatich. Svarka, 10, 25–28 [in Russian].
6. Nesterenkov, V.M. (2003) Application of scanning electron beam for welding to prevent root defects in thick steels. The Paton Welding J., 9, 5-10.
7. Golikov, I.V., Maslenkov, S.B. (1977) Dendritic segregation in steels and alloys. Moscow, Metallurgiya [in Russian].
8. Shilov, G.A. (1984) Electron beam welding of large-sized blade packages from high-chromium martensitic steels. In: Thesis for Cand. of Tech. Sci. Degree. Kyiv [in Russian].
9. Shilov, G.A., Sidorsky, N.A. (1978) Influence of welding parameters and electron beam focusing on formation of vertical welds in welding without backing. Avtomatich. Svarka, 11, 37–40 [in Russian].

---

Advertising in this issue:

---