Die-casting method of graphene enhanced aluminum based composite material

Abstract

The invention relates to a die-casting method of a graphene enhanced aluminum based composite material, and aims at solving the problems of nonuniform dispersion and difficult combining with a substrate of graphene in an aluminum alloy substrate. A semi-solid die-casting method is adopted, the graphene enhanced aluminum based composite material is prepared through melting, heat preserving, electromagnetic stirring, tamping and die-casting. The method has the advantages that the technology is advanced, data is accurate and real, procedures are strict, slurry is purified, metallographical structure compactness is good, hole shrinkage and loosening are prevented, the hardness of the prepared graphene enhanced aluminum based composite material reaches up to 85 HB, the hardness is improved by 66% compared with the substrate, the tensile strength reaches up to 8%m the tensile strength is improved by 5% compared with the substrate, the compact degree reaches up to 99.6%, and the preparation method of the graphene enhanced aluminum based composite material is advanced.

Description

technical field [0001] The invention relates to a die-casting preparation method of a graphene-reinforced aluminum-based composite material, which belongs to the technical field of preparation and application of non-ferrous metal composite materials. Background technique [0002] Graphene has excellent mechanical properties, thermal properties and electrical properties, and is one of the most ideal reinforcements for the preparation of metal-based nanocomposites. Adding graphene to aluminum alloys to prepare graphene-reinforced aluminum-based composites can improve its overall performance. Thereby expanding the application range of aluminum alloy; it can not only expand the application range of graphene, but also create favorable conditions for the industrial production of aluminum matrix composite materials; but graphene has poor wettability and weak bonding force with aluminum alloy interface, so it is difficult to Uniform distribution is a difficult problem in the prepara...

AI Technical Summary

Problems solved by technology

[0004] At present, graphene-reinforced aluminum matrix composites are mainly prepared by powder metallurgy. This preparation method has complicated molding process, high equipment cost, can only form relatively simple parts, and the production cycle of products is long; currently, semi-solid die-casting It is a new method for preparing graphene-reinforced aluminum matrix composites. This technology integrates semi-solid forming and die-casting forming technologies. It is a near-net forming process that can achieve less cutting, reduce the structure of parts, and improve the performance of parts; semi-solid The low temperature of solid-state die-casting can reduce the burning loss of graphene, and make graphene and aluminum alloy matrix tightly bonded under pressure, which is conducive to the formation of composite materials with uniform distribution of graphene; die-casting process can reduce shrinkage and shrinkage. The metallographic structure is dense, with good surface quality and mechanical properties. This technology is still under scientific research

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