Carbon fiber composite metal material needling prefabricating body and its preparation method

Abstract

The invention relates to a carbon fiber composite metal material needling prefabricating body and its preparation method. The prefabricating body is a structural unit layer formed by paving a metal material layer, a carbon fiber plane fabric, and a carbon fiber thin felt layer by layer; the metal material is a metal screen, a metal wire and metal powder which have excellent conductivity performance; the structure unit layer is laminated and prepared to be a quasi-three-dimensional structural prefabricating body containing the metal wire between the layers and connecting with the carbon fiber through puncture at many angles for many times and other steps, namely, the carbon fiber composite metal material needling prefabricating body is formed. The composite material enhanced by the prefabricating body is good in interlayer performance, uniform in quality, good in conductivity, good in mechanical performance, controllable in composite machinability; therefore, the carbon fiber compositemetal material needling prefabricating body is an ideal enhancing material of the composite material for an electric locomotive and a trolley bus.

Description

technical field [0001] The invention relates to the technology of conductive and wear-resistant materials, in particular to a carbon fiber composite metal material acupuncture preform and a preparation method thereof. Background technique [0002] Electrified traction has become the most widespread railway traction method at present, and pantograph system failure is one of the key factors causing locomotive failure. The pantograph system is a device that contacts each other through the slide plate and the contact wire and realizes current transmission through the contact section. It is composed of mechanical and electrical systems. In practical applications, due to natural factors and material factors, it is inevitable that pantograph-catenary vibration produces contact discontinuity. The optimization reform of the pantograph sliding plate is an important subject of research by technicians in this field at present, and it is an effective way to improve the working stability...

AI Technical Summary

Problems solved by technology

Metal-impregnated carbon sliders have less wear on the wires, strong arc resistance, and improved electrical conductivity and strength compared to the former two; but the impact resistance is insufficient, easy to break, fall off, and even cause bow scraping failures during use. Reshaping is required in the middle, and the cost is high

[0003] Patent CN200910046876.9 uniformly mixes graphite powder, copper powder and phenolic resin into paste glue, spreads a layer of fine copper wire mesh on carbon fiber cloth, and finally lays layers to obtain a mesh-like laminated carbon-copper composite The raw material of the material is then hot-pressed and solidified by high-pressure impregnation with phenolic resin to make a conductive slide. The slide made by this method has the characteristics of small friction coefficient, good electrical conductivity, good mechanical strength, and low wear. However, carbon fiber / graphite / copper Because there is no reinforcing fiber between layers, the material has insufficient impact resistance and is easy to delaminate. In actual use, the conductive slider is easy to delaminate and peel off, which reduces the working stability and service life of the pantograph.

In addition, graphite powder, copper powder and resin are not easy to distribute evenly, and it is difficult to control the composite process in the later stage

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