Preparation method and application of aluminum-based carbon ceramic brake disc

Abstract

The invention relates to the technical field of brake discs, and discloses a preparation method and application of an aluminum-based carbon ceramic brake disc. The preparation method comprises the following steps of A), casting an aluminum alloy matrix by adopting an aluminum alloy material; B), machining a connecting groove in the connecting surface of the aluminum alloy substrate by using a machine tool; C), obtaining a composite material solution by using the reinforced phase particles and the aluminum alloy ingot, pouring the composite material solution into a mold, and cooling to obtain a composite body; D), assembling the connecting strips on the composite body into the connecting grooves in the aluminum alloy base body; and E) carrying out stirring friction processing on the composite body, so that a composite connecting layer is formed between the composite body and the aluminum alloy matrix. Due to the fact that the connecting strips and the connecting grooves form an alternating structure, positioning can be carried out, dislocation of a composite body in the stirring friction process is avoided, a composite connecting layer with the large thickness can be formed, and the brake disc with the high bonding strength can be obtained; and the manufactured brake disc can be applied to brake components of rail transit systems such as subways and the like.

Description

technical field [0001] The invention relates to the technical field of brake discs, in particular to a preparation method and application of an aluminum-based carbon ceramic brake disc. Background technique [0002] The substantial improvement of the country's comprehensive strength will inevitably require urban rail transit and other transportation departments to further promote the process of rapid, lightweight, and modern transportation. Studies have shown that reducing the weight of rail transit vehicles and reducing energy consumption and emissions caused by braking is one of the most effective ways to achieve energy saving and emission reduction. [0003] At present, in order to effectively reduce the weight of rail transit vehicles, more and more steel parts are made of lightweight materials, such as magnesium, aluminum, engineering plastics and ceramics. Among them, aluminum alloy is a lightweight material with convenient processing and low cost, which has the advan...

AI Technical Summary

Problems solved by technology

Due to the many and dense stations of subway traffic in the city, frequent starting and braking are required during operation. However, when aluminum alloy is applied to subway brake discs, there will be defects such as poor wear resistance and difficulty in withstanding high temperatures.

In order to solve these problems, the current development trend is to use aluminum alloy to make the matrix. At the same time, in order to improve the wear resistance and high temperature resistance, a layer of composite material will be covered on the aluminum alloy matrix as a composite body. Although this structure can fully combine aluminum alloy The advantages of composite materials and composite materials also have certain problems. During the frequent braking of the brake disc, the temperature of the composite body will rise sharply. Due to the different materials used in the two, the difference in stiffness and expansion coefficient will cause uncoordinated deformation. , affecting the bonding strength of the two, which will easily lead to the separation of the complex and affect the safety of subway trains

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