Graphitized fiber, carbon fiber, ceramic fiber brake disc and manufacturing process

Abstract

The present invention relates to a kind of graphitization fiber, carbon fiber, ceramic fiber brake disc and its manufacturing process, with polyacrylonitrile graphitization fiber, polyacrylonitrile carbon fiber, ceramic fiber as skeleton material, nitrile rubber powder and barium sulfate as filler, The modified phenolic resin is used as a binder to make the brake disc raw material, and then the brake disc is made by hot pressing, heat treatment, surface polishing and drilling; the weight percentage of each component of the brake disc raw material is: polypropylene Nitrile graphitized fiber 0.5%~5%; polyacrylonitrile carbon fiber 45%~65%; ceramic fiber 10%~25%; modified phenolic resin 15%~25%; nitrile rubber powder 0.5%~2%; barium sulfate 0.5% to 2%; the invention uses a new type of brake disc made of non-metallic materials, which has the advantages of light specific gravity, large heat capacity, strong adhesion, high temperature resistance, stable friction coefficient, good wear resistance, and strong mechanical properties. Excellent braking performance, not easy to deform and wear, no noise.

Description

technical field [0001] The invention relates to a brake disc, in particular to a friction material brake disc suitable for use in brake systems of automobiles, high-speed trains and airplanes. Background technique [0002] Taking automobile brake discs as an example, at present, except for the brake discs of some luxury car racing cars in Germany, which are made of non-metallic materials, the brake discs of other countries are still made of alloy cast iron, which is made of gray pig iron, phosphorus iron, ferromanganese, and ferrochrome. , antimony, copper, graphite, bearing steel, etc. are melted together and centrifugally cast. It can be seen from the composition of the raw materials that its process formula is complex, bubbles and slag inclusions are easily generated during casting, and the reject rate is high. In addition, the use of alloy cast iron brake discs will increase the weight of the vehicle body, wasting resources and energy; the noise is loud and the vibratio...

AI Technical Summary

Problems solved by technology

From the composition of raw materials, it can be seen that its process formula is complex, and it is easy to produce air bubbles and slag inclusions during casting, and the reject rate is high

In addition, the use of alloy cast iron brake discs will increase the weight of the vehicle body, wasting resources and energy; the noise is loud and the vibration is strong during braking, especially when driving on landslides on mountain roads, sparks are likely to be generated, causing safety hazards

For example, the road section from Chongqing to Luzhou, due to the rugged mountain road, long slope, and steep slope, the friction coefficient of alloy cast iron is reduced due to the braking and sliding of the bus during driving, and the brakes are not urgent and insensitive, resulting in frequent traffic accidents

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