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Carbon-ceramic friction material as well as preparation method and application thereof

A friction material, carbon-ceramic technology, applied in the field of friction materials, can solve the problems of high braking noise, unstable wear resistance, unstable wear resistance of brake pads, etc.

Inactive Publication Date: 2017-12-01
LIAONING JIUTONG FRICTION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, traditional rail vehicles and automobiles, especially non-asbestos brake friction materials for automobiles, use phenolic resin as the bonding material, various reinforcing metal fibers as the skeleton material, and various functional fillers as the filling material. , through a series of processes such as mixing, shaping, hot pressing, heat treatment, and grinding, and finally made into brake pads for automobiles with "metal linings and non-asbestos or semi-metallic friction materials", but these products are in product performance. There are also different problems on the Internet, especially the unstable wear resistance of brake pads for automobiles and the large braking noise. People reduce the high temperature friction coefficient of friction materials by changing the composition of friction materials, as disclosed in CN103375520A by Ding Brake pads made from raw materials such as butylbenzene, cumene hydroperoxide, epoxy resin, boron phenolic resin, polypropylene, nylon powder, boron nitride, coupling agent, silicon carbide; CN102954128A discloses that in brake pads Set sound dampeners to reduce brake noise
However, the friction materials produced by the prior art still have the problems of unstable wear resistance and high braking noise.

Method used

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  • Carbon-ceramic friction material as well as preparation method and application thereof
  • Carbon-ceramic friction material as well as preparation method and application thereof

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preparation example Construction

[0034] The present invention also provides a method for preparing the carbon-ceramic friction material described in the above technical solution, including the following steps:

[0035] Wet mixing each raw material to obtain a mixture;

[0036] The mixture is dried, hot-pressed and carbonized in sequence to obtain a carbon-ceramic friction material.

[0037] In the present invention, there is no special limitation on the order of adding the raw materials, and the order of adding the raw materials well known to those skilled in the art can be adopted. In the present invention, the raw materials are preferably mixed at the same time.

[0038] In the invention, various raw materials are wet-mixed to obtain a mixture. In the present invention, the solvent used for the wet mixing is preferably water, and the mass of the water is preferably 28-35% of the sum of the mass of each raw material, more preferably 30-32%.

[0039] In the present invention, the particle size of the mixtur...

Embodiment 1

[0049] Take 7kg of phenolic resin, 3kg of aramid fiber, 3kg of acrylic fiber, 5kg of paper-based fiber, 15kg of green water slag, 20kg of shale, 20kg of purple sand, 12kg of wheat straw, 3kg of polytetrafluoroethylene, 12kg of barium sulfate, and 28kg of water. The water-wet method is mixed evenly in a vertical one-shaped high-speed mixer to obtain a mixture, and the mixture is microwave-dried to completely remove moisture, and then hot-pressed at 175°C, pressure 15MPa, and hot-pressing rate 50s / mm. Carbonization was then carried out in a tunnel-type carbonization furnace at 800°C for 2h, where the heating rate of the tunnel-type carbonization furnace was 1°C / min, and then cooled naturally to room temperature to obtain a carbon-ceramic friction material.

Embodiment 2

[0051] Take 9kg of phenolic resin, 3kg of aramid fiber, 3kg of acrylic fiber, 5kg of paper-based fiber, 20kg of green water slag, 13kg of shale, 20kg of purple sand, 12kg of wheat straw, 3kg of polytetrafluoroethylene, 12kg of barium sulfate, and 35kg of water. The water-wet method is mixed evenly in a vertical one-shaped high-speed mixer to obtain a mixture. The mixture is dried by microwave to completely remove moisture, and then hot-pressed at 180°C, pressure 20MPa, and hot-pressing rate 70s / mm. Then, carbonization was carried out in a tunnel carbonization furnace at 450°C for 12h, wherein the heating rate of the tunnel carbonization furnace was 2°C / min, and then naturally cooled to room temperature to obtain a carbon ceramic friction material.

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Abstract

The invention provides a carbon-ceramic friction material. The carbon-ceramic friction material is prepared from raw materials in parts by mass as follows: 6-12 parts of phenolic resin, 5-18 parts of organic fiber, 15-55 parts of ceramic filler, 10-25 parts of carbon source filler, 3-15 parts of organic anti-attrition filler and 10-25 parts of conventional filler. The carbon-ceramic friction material using 10-25 parts of carbon source filler has the characteristics of no brake noise, porous structure and low hardness. The embodiment proves that the density of the prepared carbon-ceramic friction material is only 1.5-1.7 g / cm<3>, the rockwell hardness HRL reaches 20-40, the porosity is higher, the water absorption rate can reach 2%-5% or higher, the friction coefficient at the temperature of 100 DEG C is 0.36, the friction coefficient at the temperature of 35 DEG C is 0.35, the reduction rate is only 2.8%, and the carbon-ceramic friction material has good friction resistance stability.

Description

technical field [0001] The invention relates to the technical field of friction materials, in particular to a carbon-ceramic friction material and its preparation method and application. Background technique [0002] At present, traditional rail vehicles and automobiles, especially non-asbestos brake friction materials for automobiles, use phenolic resin as the bonding material, various reinforcing metal fibers as the skeleton material, and various functional fillers as the filling material. , through a series of processes such as mixing, shaping, hot pressing, heat treatment, and grinding, and finally made into brake pads for automobiles with "metal linings and non-asbestos or semi-metallic friction materials", but these products are in product performance. There are also different problems on the Internet, especially the unstable wear resistance of brake pads for automobiles and the large braking noise. People reduce the high temperature friction coefficient of friction ma...

Claims

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Application Information

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IPC IPC(8): C09K3/14F16D65/04F16D69/02C04B35/80C04B33/132C04B33/13
CPCC04B33/13C04B33/132C04B35/80C04B2235/448C04B2235/96C09K3/1418C09K3/1436F16D65/04F16D69/02F16D2200/0047F16D2200/0052F16D2200/0082Y02P40/60
Inventor 闫久龙司万宝张海滨王大刚
Owner LIAONING JIUTONG FRICTION MATERIALS
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