Automatic Welding, 2022, №05



2022 №05 (04)

DOI of Article 10.37434/as2022.05.05

2022 №05 (06)

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Avtomaticheskaya Svarka (Automatic Welding), #5, 2022, pp. 33-39

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

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-~ titanium alloy of Ti–5.6Al– 2.2Sn–3.5Zr–0.4Mo–1.0V–0.6Si system was studied. Joint preheating up to temperatures of 200 and 400 °C was used in the work. Temperature of preheating before welding in the range of 200…400 °С does not influence the final microstructure of the produced welded joints. AAW joints of high-temperature pseudo-~ Ti–5.6Al–2.2Sn–3.5Zr–0.4Mo–1.0V–0.6Si alloy, made with preheating up to 400 °С, have the highest ultimate tensile strength on the level of σ_t = 1160.1 MPa, impact toughness values of samples with a sharp notch are on the level of 8.3 J/cm2. 12 Ref., 4 Tabl., 6 Fig.
Keywords: titanium, titanium alloys, dispersion hardening, high-temperature pseudo-~ titanium alloy, argon-arc welding, structure, properties, strength

Received: 15.04.2022

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