Steel-based carbon fibre composite material and preparation method thereof

Abstract

The invention relates to a steel-based carbon fibre composite material and a preparation method thereof. The steel-based carbon fibre composite material comprises a plurality of bent carbon fibres which intertwine one another, a steel-based material and an adhesive which is adhered to the surface of the carbon fibres, wherein the carbon fibres, the adhesive and the steel-based material are formed by connecting through chemical bonds; a coral-like interface is formed between the adhesive which is adhered to the surfaces of the carbon fibres and the steel-based material through the chemical bonds; the preparation method for the steel-based carbon fibre composite material comprises the following steps: infiltrating the carbon fibres by utilizing the liquid adhesive; intertwining the carbon fibres after excessive adhesive is extruded away so that three-dimensional structural sponge-shaped carbon fibres which are adhered with the adhesive are formed; compounding the carbon fibres with the steel-base material after vacuumizing treatment is performed; finally, placing the composite material into a mould, pressurizing, cooling and moulding to obtain the steel-based carbon fibre composite material which is connected through the chemical bonds. The composite material prepared by the preparation method is far beyond the upper modulus limit of various types of conventional steel substrate materials; the rigidity, the tensile strength, the breaking power and the shearing strength are greatly improved.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a steel-based carbon fiber composite material and a preparation method thereof. Background technique [0002] Since the modulus, tensile strength, fatigue strength, and specific strength of ordinary steel have upper limits, they cannot meet the higher-level material science requirements, so more and more automobile manufacturers begin to apply steel matrix carbon fiber composite materials to automobiles. panels to improve vehicle performance and reduce vehicle manufacturing costs. [0003] The existing steel-based fiber-reinforced composite materials mainly include the following two types: carbon fiber sheet steel sandwich composite materials and carbon fiber tow-carbon fiber prefabricated rod composite materials. The performance of these two carbon fiber composite materials is not significantly improved, and the composite between carbon fiber and steel plate is not tight, and...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a steel-based carbon fiber composite material and its preparation method in view of the current problems, wherein the performance of the composite material is much higher than that of ordinary steel, and at the same time, the production cost, process threshold, batch process and versatility and other aspects are controlled within the metal material system, which generally benefits industries with high-performance material requirements

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