Low ceramet group automobile brake block and preparation method thereof

Abstract

The present invention discloses a low ceramet group automobile brake block, comprising by weight percentage 15-30 of cementing matrix, 25-50 of fortifying fiber, 10-20 of frictional property regulating agent, 5-10 of elastic toughening agent, and 10-30 of filling material. The cementing matrix principally employs a modified sodium aluminosilicate as an inorganic high temperature binder, a little phenol aldehyde resin and rubber as an organic middle / low-temperature auxiliary binder, wherein the weight ratio of the inorganic ceramic binder and the organic binder is 5:1; the fortifying fiber is principally the steel fiber, the copper fiber, mineral fiber and organic fiber are used as the auxiliary fortifying fiber, the weight ratio of the steel fiber and the auxiliary fortifying fiber is 1:1; the frictional property regulating agent principally includes chromic iron, graphite and friction powder; the elastic toughening agent principally includes acrylonitrile butadiene, and organic friction powder; and the filling material is principally petroleum coke and barite. The low ceramet group automobile brake block has a long service life and a superior braking performance, and the preparation method is simple and feasible.

Description

technical field [0001] The invention relates to a brake pad, in particular to a low metal ceramic matrix composite brake pad used in an automobile braking system, and also relates to a preparation method of the brake pad. Background technique [0002] Automobile brake pads are the key components of Class A of the automobile braking system, and their performance is directly related to the safety and reliability of automobile operation. At present, the mainstream automobile brake pads on the market are all made of semi-metal or metal-less resin-based friction materials. When the car is in continuous or emergency braking, the temperature on the surface of the brake pads and brake discs is as high as 500-700 ° C. Due to the resin-based brake pads Poor temperature resistance, it will decompose and release water, gas, oil, etc. at high temperature, and form a thin film on the friction surface, making dry friction into mixed friction or wet friction, the friction coefficient is sig...

AI Technical Summary

Problems solved by technology

At present, the mainstream automobile brake pads on the market are all made of semi-metal or metal-less resin-based friction materials. When the car is in continuous or emergency braking, the temperature on the surface of the brake pads and brake discs is as high as 500-700 ° C. Due to the resin-based brake pads Poor temperature resistance, it will decompose and release water, gas, oil, etc. at high temperature, and form a thin film on the friction surface, making dry friction into mixed friction or wet friction, the friction coefficient is significantly reduced, and there is a hidden danger of brake failure. Due to the large amount of thermal decomposition of the resin, its bonding effect is reduced, and the high temperature wear of the material is aggravated, resulting in a significant reduction in the service life of the brake pads

Some metal-less resin-based friction materials currently on the market use a large amount of ceramic fibers instead of traditional steel fibers. As the main binder, it has problems such as easy cracking and poor high-temperature wear performance at high temperatures.

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