Aluminum alloy and preparation method and application thereof

By optimizing the chemical composition and process of aluminum alloys, aluminium alloy with high strength, high elongation and high conductivity is formed, which solves the problem of insufficient performance of existing aluminum alloys in electromagnetic shielding applications, and achieves better electromagnetic shielding effect and processing performance.

CN119753461APending Publication Date: 2025-04-04NANTONG HENGJIN COMPOSITE MATERIALS
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Patent Information

Application Number
CN202411441043.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-16
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

Existing aluminum alloys have difficulty meeting the increased demands in strength, elongation and conductivity, resulting in poor performance in electromagnetic shielding applications.

Method used

By optimizing the chemical composition of the aluminum alloy, including the addition of appropriate amounts of Fe, Cu, Mg, B and RE elements, a face-centered cubic substituted solid solution and co-uniform relationship is formed, which enhances the tensile strength and conductive properties of the aluminum alloy, while refining the grains to improve processing performance.

Benefits of technology

It realizes the high strength, high elongation and high conductivity of aluminum alloy, and is suitable for cable shielding aluminum tape, improving electromagnetic shielding effect and processing convenience.

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Abstract

The present invention provides an aluminum alloy and a preparation method and application thereof, belonging to the technical field of electromagnetic shielding materials. The addition of Fe in the present invention is conducive to the formation of a face-centered cubic substitution solid solution, resulting in distortion of the aluminum matrix lattice, increasing the resistance to dislocation movement, thereby improving the tensile strength; at the same time, it can also reduce the resistivity; the addition of Cu, since both Cu and Al are face-centered cubic structures, a part of Cu is solid-dissolved in the Al matrix, and a substitution reaction occurs. Due to the difference in radius between Al atoms and Cu atoms, lattice distortion occurs around Al atoms, solid solution strengthening, and tensile strength increases. In addition, Cu can refine grains and increase grain boundaries; rare earth elements can remove gas and impurities in aluminum alloys, refine grains, and improve the strength of aluminum alloys; at the same time, rare earth elements can maintain a coherent relationship with the matrix Al, effectively pin dislocations, stabilize substructures, and prevent grain boundary sliding, thereby improving strength.
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