The Paton Welding Journal, 2022, №08



2022 №08 (04)

DOI of Article 10.37434/tpwj2022.08.05

2022 №08 (06)

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The Paton Welding Journal, 2022, #8, 32-38 pages

Reactive-flux brazing of aluminium to titanium

O.M. Sabadash, S.V. Maksymova

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
Metal in argon application of reactive flux of KAlF4–10K2SiF6 system with additives of CoF2, K2ZrF6 compounds, promotes production of a sound joint due to formation of a low-melting alloy of Al-Si system on the contact surface. The low-melting alloy of Al-Si system newly-formed at reactive-flux brazing can independently fulfill the function of brazing filler metal at formation of a dissimilar metal joint. Cobalt reduced from the flux has little influence on weld structure and joint strength. At application of Al–12Si brazing filler metal and reactive flux of KAlF4–10K2SiF6–5K2ZrF6 system, which contains potassium-zirconium fluoride (K2ZrF6), a certain refinement of the structure (dendrites of aluminium-based solid solution) is observed from the aluminium side that promotes an improvement of shear strength of aluminium-titanium brazed joints. 33 Ref., 3 Tabl., 8 Fig.
Keywords: aluminium, titanium, reactive-flux brazing, Al–Si brazing filler metal, reactive flux of KF–AlF3–K2SiF6 system, brazed joint

Received: 04.07.2022
Accepted: 17.10.2022

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