Carbon fiber composite structural member with multilayer structure, and preparation method thereof

Abstract

The invention discloses a carbon fiber composite structural member with a multilayer structure. The carbon fiber composite structural member comprises a first metal layer and a second metal layer, andan alloy layer and a carbon fiber layer which are formed between the first metal layer and the second metal layer; the alloy layers and carbon fibers are alternately stacked; the first metal layer and the second metal layer are respectively provided with a first extending part and a second extending part which exceed the alloy layer and the carbon fiber layer, and the first extending part and thesecond extending part are fixedly connected, and can be conveniently connected with other structural parts. According to the carbon fiber composite structural member, the carbon fiber layer and the outer high-melting-point metal layers are connected together through the low-melting-point alloy layer, and the alloy layer can fully infiltrate the carbon fiber layer; the first metal layer and the second metal layer can be fixedly connected with the first extending part and the second extending part in a spot welding mode, and therefore it is guaranteed that the alloy layer and the carbon fiber layer are fixed in position during forming. The carbon fiber composite structural member prepared through the above method is high in strength, light in weight and easy to weld, and the problems that atraditional metal matrix composite is prone to aging, low in interlayer binding force and the like are solved.

Description

technical field [0001] The invention relates to the fields of carbon fiber composite materials and thermoforming, in particular to a carbon fiber composite structure with a multilayer structure and a preparation method thereof. Background technique [0002] In the prior art, the thermal molding technology of single-layer or multi-layer continuous carbon fiber reinforced epoxy resin provides a lightweight and high-strength solution for structural parts. Although continuous carbon fiber reinforced resin structural parts have the advantages of light weight and high strength, they are limited to the characteristics of long time heating and curing in the resin hot molding process, the manufacturing cycle is low, and the manufacturing cost is high. At the same time, the resin material is easy to age, not resistant to bumps, and has low strength. Therefore, improvements are made on this basis, and the continuous carbon fiber reinforced resin structure is combined with the metal pl...

AI Technical Summary

Problems solved by technology

However, due to the composite material made of short fibers, it is difficult for the aluminum alloy to fully infiltrate with the carbon fiber by heating to the melting temperature, and it can only be wrapped around the carbon fiber bundle, and the strength increase is limited; Connect to other structures

It is difficult to fully infiltrate between layers, resulting in low bonding force between layers

Images