The Paton Welding Journal, 2020, №02



2020 №02 (06)

DOI of Article 10.37434/tpwj2020.02.07

2020 №02 (08)

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The Paton Welding Journal, 2020, #2, 35-40 pages
 

Properties of joints of V1341T grade alloy under the conditions of tig welding

V.A. Koval, T.M. Labur and M.R. Yavorska

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 paper presents the results of studying the weldability of sheet aluminium alloy of V1341T grade of Al−Mg−Si− Cu−Fe system under the conditions of manual nonconsumable electrode argon-arc welding. This alloy is characterized by high susceptibility to hot cracking in welding. The hot brittleness index is equal to A = 65.8–85.5 %. The impact of filler material chemical composition on hot cracking resistance of weld metal was studied. It is found that in welding by batch-produced wires of ZvAMg63, Zv1201, Zv1217 grades the crack resistance value is A = 30.3–53.9 %, and at application of wire of ZvAK5 grade this characteristic of welds is equal to A = 6.6–19.8 %. Manual nonconsumable electrode argon-arc welding of V1341T alloy allows producing tight sound joints of this material with strength coefficient of 0.80–0.87, which also depends on filler wire chemical composition. The average value of ultimate strength of the alloy welded joints, made using different grades of filler wire is equal to σt = 199.2–209.0 MPa, and the yield limit σ0.2 = 136.6–147.6 MPa; relative elongation δ = 4.0–5.2 %, and bend angle α = 40–65 deg. 7 Ref., 4 Tables, 5 Figures.
Keywords: aluminium alloy, manual nonconsumable

Received 11.12.2019

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