METHOD OF PRODUCING A BIMETALLIC CONDUCTOR WITH A COPPER SHELL AND A CORE FROM AN ALUMINIUM ALLOY OF THE AL-FE SYSTEM Russian patent published in 2025 - IPC H01B13/00 H01B1/02 C23C18/31 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering, namely to methods of producing bimetallic conductors with an aluminium alloy core and a copper sheath, used for the production of wires with a diameter of up to 3 mm, intended for use in electrical products used in audio equipment, wireless power transmission systems, high-precision sensors, special resistors and capacitors, hearing aids, high-frequency signal cables. On wire from aluminium alloy of Al-Fe system, preliminary drawn to required diameter, in alkali solution (NaOH) with subsequent washing in hot and cold water, clarification and activation of surface in nitric acid (HNO₃) nickel is applied in sulphate electrolyte (NiSO₄) at 40 °C for 5 minutes at current density of 5 A/dm² until the nickel layer reaches thickness of at least 20 mcm, with subsequent application of copper in sulphate electrolyte (CuSO₄) at room temperature for two hours at current density of 5 A/dm² until copper layer thickness is not less than 60 mcm.

EFFECT: high mechanical strength and electrical conductivity of the bimetallic conductor.

1 cl, 1 dwg, 1 ex