HEAT-RESISTANT ELECTROCONDUCTIVE ALLOY BASED ON ALUMINIUM (VERSIONS) AND METHOD OF PRODUCTION OF DEFORMED SEMI-FINISHED PRODUCT OUT OF ALUMINIUM ALLOY Russian patent published in 2015 - IPC C22C21/12 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, in particular to the deformed nanostructure alloys based on aluminium, and to the methods of their production for items working under high temperatures. Aluminium-based alloy contains the following components in wt %: copper 0.5-0.85; manganese 0.5-0.95; boron 0.02-0.15; zirconium 0.1-0.5; scandium 0.02-0.15; iron 0.01-0.3; silicon 0.01-0.15, inevitable admixtures 0-0.1, from them each 0-0.03, aluminium - rest. At that boron presents in the alloy structure in form of the nanoparticles AlB₂, AlB₁₂, borides of transient metals with average size 50 nm maximum, at that the alloy has conductivity over 54% IACS and tensile strength (σ_B) after 400 hours of heating at 250°C at least 160 MPa. According to the second option the alloy contains in wt %: copper 0.9-2.0, manganese 1.0-1.6, boron 0.02-0.15; zirconium 0.1-0.5; scandium 0.02-0.15; iron 0.01-0.3; silicon 0.01-0.15, inevitable admixtures 0-0.1, from them each 0-0.03, aluminium - rest, at that the boron presents in the alloy structure in form of the nanoparticles AlB₂, AlB₁₂, borides of transient metals with average size 50 nm maximum, at that the alloy has tensile strength after 400 hours of heating at 250°C up to 230-280 MPa. Method includes the melt preparation at temperature by 100°C above temperature of the melt liquidus, at that the alloying components are added to the melt in form of addition alloys, having fine structure with average size of the nanostructures 1500 nm maximum, crystallisation and deformation under action of the magnetic pulse field and/or low pulse current.

EFFECT: improvement of the alloy thermal resistance and conductivity.

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