The Paton Welding Journal, 2021, №02



2021 №02 (05)

DOI of Article 10.37434/tpwj2021.02.06

2021 №02 (07)

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The Paton Welding Journal, 2021, #2, 33-36 pages

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

V.M. Nesterenkov, L.A. Kravchuk and 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
The influence of technological and metallurgical factors on welded joint formation 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 UL-209M installation allows performing cleaning of the adjacent butt 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 electron beam scanning in a circle allowed a significant reduction in the temperature in the central part of the welding pool and, thus, eliminated burnouts and splash of weld metal. It was established that the optimal welding speed at an accelerating voltage Uacc = = 60 kV is in the range vw = 6–8 mm/s. Metallurgical treatment of welding pool with the help of inserts of aluminium and titanium foil eliminates the susceptibility to pores formation in the weld metal. 16 Ref., 1 Table, 5 Figures.
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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