Reinforced type aluminum-copper-based composite friction material

Abstract

The invention discloses a reinforced type aluminum-copper-based composite friction material which is prepared by carrying out procedures of raw material mixing, hot press molding and curing, wherein the raw materials comprise the following components in parts by weight: 15-20 parts of cast aluminum alloy ZAlSi8MgBe powder, 8-10 parts of copper alloy Cu30Ni15Mn powder, 8-10 parts of silicon carbide, 6-8 parts of potassium titanate fiber, 5-6 parts of aramid fiber, 5-6 parts of zirconia, 3-4 parts of tetrapod-like zinc oxide whisker, 1-2 parts of molybdenum disulfide, 1-2 parts of barium sulfate, 1-2 parts of tungsten carbide, 1.5-2 parts of nitrile rubber and 1-2 part of nano-titanium dioxide. According to the reinforced type aluminum-copper-based composite friction material, aluminum alloy and copper alloy are adopted to replace steel in a base material, as the heat radiation of the aluminum alloy and copper alloy is greatly higher than that of ordinary steel, the heat generated from brake friction can be radiated in time, the temperature of the surface of a brake pad is reduced, the high-temperature head fading property is alleviated, and the wear rate is small; and meanwhile the experiment shows that the noise frequency is less than 450Hz, so that people cannot hear conspicuous noise in an automobile.

Description

technical field [0001] The invention relates to the field of new materials, in particular to an enhanced aluminum-copper-based composite friction material. Background technique [0002] At present, the friction materials for making brake pads are mainly divided into traditional asbestos-type brake pads, metal hybrid brake pads and ceramic-based friction material brake pads. Among them, the outstanding problems of asbestos brake pads are low strength, poor thermal stability, and easy wear, which have been gradually eliminated; metal hybrid brake pads are still the main type of brake pads, and the main material is steel fiber as a reinforcing fiber. Due to the high metal content , its thermal conductivity and strength have been improved to a certain extent, but due to the better road conditions in cities and expressways, and the popularity of family cars, the good road conditions lead to faster vehicle speeds, and the brake pads bear greater stress when braking. One of the br...

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Problems solved by technology

Among them, the outstanding problems of asbestos brake pads are low strength, poor thermal stability, and easy wear, which have been gradually eliminated; metal hybrid brake pads are still the main type of brake pads, and the main material is steel fiber as a reinforcing fiber. Due to the high metal content , its thermal conductivity and strength have been improved to a certain extent, but due to the better road conditions in cities and expressways, and the popularity of family cars, the good road conditions lead to faster vehicle speeds, and the brake pads bear greater stress when braking. Brake pads are noisy on the one hand, and on the other hand, due to the general heat dissipation and high surface temperature, the heat decay is obvious and the wear is serious, the service life is greatly shortened and safety accidents are prone to occur

With the rapid development of automobile technology, it has higher requirements for braking safety. Due to the lack of scientific design of material matching, the existing friction material brake pads still have high-speed degradation, high temperature degradation, stability, noise and vibration. and low service life

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