Electrometallurgy Today, 2023, №03



2023 №03 (06)

DOI of Article 10.37434/sem2023.03.07

2023 №03 (01)

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Electrometallurgy Today (Sovremennaya Elektrometallurgiya), 2023, #3, 48-55 pages

Manufacturing technologies of Cu‒Al bimetallic composites (Review)

I.V. Ziakhor¹, A.O. Nakonechnyi¹, Wang Qichen², Linyu Fu³, V.V. Koltsov⁴

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²CIMC Offshore Engineering Institute Company Limited, Yantai, Shandong, P.R. China
³Yantai Fisend Bimetal Co. Limited, Yantai, Shandong, P.R. China
⁴Enterprise Technologies LTD. 1U Starosilska Str., 02125, Kyiv, Ukraine

Abstract
Copper-aluminium composites are widely used in the power transmission, telecommunications, aviation, automotive and electronics industries. The review is devoted to the analysis of manufacturing technologies of bimetallic copper-aluminium composites. It is shown that two metallurgical methods for the production of Cu‒Al composite blanks have been used — continuous casting with vertical core filling and continuous casting (VCFC) with horizontal core filling (HCFC). The last of the methods is most suitable for industrialization. The features of phase transformations at the Cu/ Al interface during casting of bimetallic composites, their thermomechanical deformation, and welding are considered. It is shown that the interface between the Al-core and the Cu-shell is a multilayer structure consisting of layers of phases γ1(Cu9Al4), δ(Cu3Al2), η2(CuAl), ε2(Cu3Al2+x), θ(CuAl2), and eutectic α(Al)/θ(CuAl2) layers. For the production of copper- clad aluminium (CCA) wire from bimetallic blanks, methods of rolling, drawing and welding are used. The final goal of the review is to determine the initial data and technical solutions for the development of an effective technology for butt welding of copper-aluminium blanks in the production of CCA composites. 32 Ref., 1 Tabl., 6 Fig.
Keywords: copper-aluminum composite, copper-clad aluminum, continuous casting, Cu/Al interface, intermetallic layer, eutectic

Received 31.08.2023

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