The Paton Welding Journal, 2022, №05



2022 №05 (03)

DOI of Article 10.37434/tpwj2022.05.04

2022 №05 (05)

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The Paton Welding Journal, 2022, #5, 26-32 pages

Argon-arc welding of high-temperature titanium alloy doped by silicon

S.V. Akhonin, V.Yu. Bilous, R.V. Selin, I.K. Petrychenko, L.M. Radchenko, S.B. Rukhanskyi

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
Welding of titanium alloys doped by silicon requires application of additional technological operations, such as local heat treatment and preheating. In view of the fact that tungsten electrode argon-arc welding became widely applied in industry, the possibility of application of preheating for argon-arc welding of high-temperature pseudo-α titanium alloy of Ti‒5.6A1‒2.2Sn‒3.5Zr‒0.4Mo‒1.0V‒0.6Si system was studied. In the work, preheating of the joints to the temperatures of 200 and 400 °C was used. The temperature of preheating before welding in the range of 200‒400 °C does not influence the final microstructure of the produced welded joints. AAW-joints of high-temperature pseudo-α Ti‒5.6Al‒2.2Sn‒3.5Zr‒0.4Mo‒l.0V‒0.6Si alloy, produced with the preheating to 400 °C, have the highest ultimate tensile strength on the level of σt = 1160.1 MPa, impact toughness values of samples with a sharp notch are on the level of 8.3 J/cm2.
Keywords: titanium, titanium alloys, dispersion hardening, high-temperature pseudo-α titanium alloy, argon-arc welding, structure, properties, strength

Received: 15.04.2022
Accepted: 08.08.2022

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