Brake disc and preparation method thereof

Abstract

The invention discloses a brake disc. The brake disc is used for a brake system of a motor vehicle, rail traffic and an aircraft. The brake disc comprises a brake disc body; the brake disc body is analuminium alloy brake disc body; a wear resistant layer is compounded on each of the two working surfaces of the aluminium alloy brake disc body; the wear resistant layers are ceramic-high temperatureresistant metal composite reinforcement material wear resistant layers; the ceramic-high temperature resistant metal composite reinforcement material wear resistant layers are metallurgical combinedwith the aluminium alloy brake disc body through an extruding casting process; the brake disc disclosed by the invention is light in weight, high in strength, good in wear resistance, good in radiating property and long in service life; the weight and the service life of the brake disc are close that those of a carbon-ceramic brake disc; the machining cost and the maintenance cost are low; the service life is over three hundred thousand kilometres; the using cost is close to ductile iron brake disc; the passage capacity of the motor vehicle, the rail traffic and the aircraft can be improved, and the brake distance can be shortened; the safety is improved; and the brake disc is suitable for large-batch production.

Description

technical field [0001] The invention relates to a key part of a brake system of a motor vehicle, a rail transit, an aircraft, etc., in particular to a brake disc and a preparation method thereof. Background technique [0002] Brake discs (also known as brake discs or brake discs) are important safety components for motor vehicles, rail transit and aircraft. Through the friction between the brake disc and the brake pad, the mechanical energy is converted into heat energy, so that the running wheel is braked. Therefore, it is very important to be able to brake reliably. If the brake fails in an emergency, a safety accident will occur. Even cause car crashes. Therefore, the brake disc is a very important safety component. At present, "energy saving, environmental protection, and lightweight" have become important development directions of motor vehicles, rail transit and aircraft, so the weight reduction of brake discs is even more important. Because the brake disc belongs t...

AI Technical Summary

Problems solved by technology

The carbon ceramic plate is obtained by immersing carbon fiber material in resin glue and then cured at high temperature. The price is very expensive, and it is only equipped with aircraft and a small number of luxury cars.

[0004] The ductile iron plate has the following disadvantages: 1. The density of ductile iron is high, reaching 7.3g / cm 3 For example, a Φ355mm brake disc for a car weighs about 11.78Kg (equivalent to a sprung weight of 35.34~58.9Kg), and a car needs 4 pieces, so its unsprung weight is relatively large, which will undoubtedly increase the weight of the vehicle significantly. Fuel consumption reduces the mobility of the vehicle. In addition, it is difficult to disassemble and maintain related components; 2. The thermal conductivity of cast iron is poor, and the heat generated by friction during braking is slow to dissipate, which may easily cause the brake system to fail due to excessive temperature rise; 3. 1. Cast iron brake discs are generally cast with sand molds. The dimensional accuracy and surface finish of the castings are poor, and the internal shrinkage pores are not easy to control. Moreover, the energy consumption required for casting is high, and the pollution to the environment is large.

[0005] Although the weight of a carbon ceramic plate is only about half that of a ductile iron plate, its price is about 50 times more than that of a ductile iron plate due to its expensive raw materials, complex manufacturing equipment and processes

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