Automatic Welding, 2025, №03

2025 №03 (04)

DOI of Article 10.37434/as2025.03.05

2025 №03 (06)

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"Avtomatychne Zvaryuvannya" (Automatic Welding), #3, 2024, pp. 33-38

Influence of electron beam welding technology on the width of the softening zone of 2219 aluminum alloy

V.V. Skryabinskyi, V.M. Nesterenkov, M.O. Rusynyk, V.I. Zagornikov, O.I. Goncharenko, I.M. Klochkov

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: skriabinski.vv.555@gmail.com

During electron beam welding (EBW) of 2219 alloy, the strength characteristics of joints can decrease by up to 50 % in relation to the base metal. In order to ensure the uniform strength of the structure, locations of the welds are chosen in thickened areas. At the same time, the width of the thickened area should be larger than the width of the softening zone of the welded joint. The softening zone of the joint includes the cast zone and the heat-affected zone (HAZ), in which the strength of the base metal decreased. The influence of welding speed and the use of technological straps on the width of the cast zone and the HAZ, i.e. on the width of the softening zone during EBW of 2219 alloy plates, were investigated. It was found that an increase in the welding speed from 10 to 20 mm/s reduces the width of the softening zone by approximately half. The use of a technological strap allows reducing the width of the softening zone by approximately 20 %. In this case, the weld depression is formed in the body of the strap, and after its removal, the welded butt does not require further mechanical treatment. The calculation and experimental methods established that the technological strap cuts off the peripheral part of the electron beam, which is about 5 % of its full power. In practice, the influence of this peripheral part leads to undesirable expansion of the weld on the side of the beam entrance and to additional heating of the base metal and, as a result, to an increase in the size of the softening zone. 11 Ref., 3 Tabl., 8 Fig.
Keywords: electron beam welding, aluminium alloy, heat-affected zone, softening zone, technological strap


Received: 04.03.2025
Received in revised form: 06.05.2025
Accepted: 15.05.2025

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