Electrometallurgy Today, 2025, №04

2025 №04 (07)

DOI of Article 10.37434/sem2025.04.08

2025 №04 (01)

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"Suchasna Elektrometallurgiya" (Electrometallurgy Today), 2025, #4, 49-56 pages

Structure and properties of welded joints of titanium alloy PT-3V produced by narrow-gap welding

S.V. Akhonin, V.Yu. Bilous, R.V. Selin

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

Abstract
Narrow-gap argon arc welding is an effective and cost-efficient method of making thick titanium alloy joints. A feature of the developed technology is the constant chemical composition of the weld metal, the proportion of the base metal in the weld metal being 89…91 %. This work considers the influence of the filler material on the structure and properties of welded joints of the titanium alloy PT-3V, performed by tungsten electrode narrow-gap welding with a magnetically controlled arc. Filler wires 2 V and SPT2 in narrow-gap welding of the titanium alloy PT-3V ensure high-quality formation of the concave surface of the welded bead, the strength of welded joints produced with filler wire 2 V is at the level of 643 MPa, which is 86 % of the strength of the base metal. The use of filler wire SPT2 for narrow-gap welding of titanium alloy PT-3V made it possible to obtain a weld metal structure similar to the structure of the base metal and to ensure equal strength of the welded joint to the base metal in the as-welded state. 13 Ref., 7 Tabl., 8 Fig.
Keywords: titanium, titanium alloy, argon-arc welding, narrow-gap welding, control magnetic field, filler wire, microstructure, mechanical properties

Received: 10.07.2025
Received in revised form: 17.07.2025
Accepted: 07.10.2025

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