Automatic Welding, 2021, №02



2021 №02 (05)

DOI of Article 10.37434/as2021.02.06

2021 №02 (07)

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Avtomaticheskaya Svarka (Automatic Welding), #2, 2021, pp. 38-42

Influence of technological and metallurgical factors on formation of copper welded joints in electron beam welding

V.M. Nesterenkov, L.A. Kravchuk, 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

The influence of technological and metallurgical factors on the formation of welded joints in electron beam welding of M1 copper grade with the thickness δ = 18 mm by a vertical electron beam in the flat position in a one pass was studied. The system of a computer control of the process of electron beam welding in the installation UL-209M allows performing cleaning of the adjacent joint zone from the remnants of contaminants and oxides using a low-power electron beam focused on the metal surface in a single technological cycle. The use of high-speed local scanning of the electron beam in a circle allowed a significant reduction in the temperature in the central part of the welding pool and, thus, eliminated burnouts and splashes of weld metal. It was established that the optimal welding speed at accelerating voltage Uacc = 60 kV is in the range vw = 6...8 mm/s. Metallurgical treatment of welding pool with the inserts of aluminium and titanium foil eliminates the tendency to formation of pores in the weld metal. 16 Ref., 1 Tabl., 5 Fig.
Keywords: electron beam welding, electron beam, computer control, circular scanning, penetration depth, input energy, welding speed, facial bead width, porosity


Received: 30.11.2020

References

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