The Paton Welding Journal, 2023, №05



2023 №05 (04)

DOI of Article 10.37434/tpwj2023.05.05

2023 №05 (06)

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The Paton Welding Journal, 2023, #5, 29-34 pages

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

Abstract
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
Accepted: 29.06.2023

References

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