Preparation method of wear-resistant carbon/ceramic brake material

A brake material and anti-wear technology, applied in mechanical equipment, friction linings, gear shifting mechanisms, etc., can solve the problems of aggravating oxidation and wear of friction interface, affecting the runout of the end face of the brake disc, affecting the performance and life of the brake disc, etc. The effect of improving densification speed, good friction and wear resistance, and improving stability

Active Publication Date: 2021-02-26
山东道普安制动材料有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

This invention shortens the preparation cycle, but the mechanical properties of the obtained material are not good. Under the action of impact load, the material is prone to fracture, and cracks and blocks appear on the brake disc surface, and the product safety is not good.
At the same time, in the existing carbon / ceramic brake disc materials, there is a large amount of carbon phase inside the material. During the braking process, because the friction surface is directly exposed to the air, the carbon phase and carbon fiber are easy to oxidize, resulting in increased oxidation and wear of the friction interface, which affects braking. Disc end surface runout, which in turn causes brake noise and affects the performance and life of the brake disc

Method used

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  • Preparation method of wear-resistant carbon/ceramic brake material

Examples

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Embodiment 1

[0039] A method for preparing an anti-wear carbon / ceramic brake material, comprising the steps of:

[0040] (1) Firstly, the purchased T700 chopped carbon fiber is made into a short-fiber tire mesh, and the tire mesh is stacked in sequence, and then the relay-type needling method is used to needle the above-mentioned layered and stacked tire mesh with barbs. During the acupuncture process, the claws of the barbed needles bring the fibers of each tire mesh layer to the vertical direction, so that the tire meshes are connected into one body, and the three-dimensional tire mesh needle-punched prefabricated body is obtained. Cut the three-dimensional tire mesh needle-punched preform into a ring shape with an outer diameter of 400mm, an inner diameter of 150mm, and a thickness of 60mm. The needle-punched hole density in the three-dimensional tire mesh prefabricated body is 10 holes / cm 2 , the volume content of carbon fiber is about 15%, and the density of the three-dimensional tir...

Embodiment 2

[0048] A method for preparing an anti-wear carbon / ceramic brake material, comprising the steps of:

[0049] (1) Firstly, the purchased T700 chopped carbon fiber is made into a short-fiber tire mesh, and the tire mesh is stacked in sequence, and then the relay-type needling method is used to needle the above-mentioned layered and stacked tire mesh with barbs. During the acupuncture process, the claws of the barbed needles bring the fibers of each tire mesh layer to the vertical direction, so that the tire meshes are connected into one body, and the three-dimensional tire mesh needle-punched prefabricated body is obtained. Cut the three-dimensional tire mesh needle-punched prefabricated body into a ring shape, with an outer diameter of 350mm, an inner diameter of 150mm, and a thickness of 70mm. The needle-punched hole density in the three-dimensional tire mesh prefabricated body is 8 holes / cm 2 , the volume content of carbon fiber is about 15%, and the density of the three-dime...

Embodiment 3

[0056] A method for preparing an anti-wear carbon / ceramic brake material, comprising the steps of:

[0057](1) Firstly, the purchased T700 chopped carbon fiber is made into a short-fiber tire mesh, and the tire mesh is stacked in sequence, and then the relay-type needling method is used to needle the above-mentioned layered and stacked tire mesh with barbs. During the acupuncture process, the claws of the barbed needles bring the fibers of each tire mesh layer to the vertical direction, so that the tire meshes are connected into one body, and the three-dimensional tire mesh needle-punched prefabricated body is obtained. Cut the three-dimensional tire mesh needle-punched preform into a ring shape with an outer diameter of 300mm, an inner diameter of 120mm, and a thickness of 50mm. The needle-punched hole density in the three-dimensional tire mesh prefabricated body is 9 pcs / cm 2 , the volume content of carbon fiber is about 15%, and the density of the three-dimensional tire me...

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Abstract

The invention provides a preparation method of an anti-wear carbon / ceramic brake material. The preparation method comprises the following steps: firstly, preparing a three-dimensional tire net needling prefabricated body by utilizing a short fiber tire net, and then carrying out high-temperature heat treatment, vacuum pressure impregnation in a resin solution, drying, hot-pressing curing and carbonization treatment to obtain a carbonized prefabricated body; then carrying out vacuum pressure impregnation on a phenolic resin solution containing ceramic powder or a furfuryl ketone resin solutioncontaining ceramic powder, carrying out curing and carbonization treatment, and repeating the above steps to prepare a carbon-carbon composite material with the density of 1.01.7 g / cm<3>; and finally,carrying out high-temperature heat treatment and siliconizing treatment to obtain the wear-resistant carbon / ceramic brake material with the density of 1.9 g / cm<3>-3.0g / cm<3>. According to the preparation method disclosed by the invention, on the basis of ensuring the mechanical properties and the thermal physical properties of the obtained material, the production period of the carbon / ceramic brake material is shortened, the wear resistance and the oxidation resistance of the material are improved, and the purposes of reducing the production cost and improving the brake performance are achieved.

Description

technical field [0001] The invention relates to a preparation method of an anti-wear carbon / ceramic brake material, belonging to the technical field of brake material preparation. Background technique [0002] Carbon / ceramic brake material is a new high-performance brake material developed after powder metallurgy brake material and carbon / carbon brake material. On the basis of retaining the excellent performance of ceramic materials such as high temperature resistance and oxidation resistance, carbon / ceramic brake materials overcome the fatal shortcomings of high brittleness and poor reliability of ceramics. The fracture behavior of carbon / ceramic brake materials is similar to that of metals, with low crack sensitivity and no catastrophic failure, making it a new generation of high-performance brake materials. [0003] At present, the main preparation processes of carbon / ceramic brake discs are divided into two types: long-fiber chemical vapor deposition and short-fiber com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/622F16D69/02
CPCC04B35/83C04B35/622F16D69/02C04B2235/48C04B2235/5252C04B2235/3826C04B2235/3821C04B2235/77C04B2235/616C04B2235/3873C04B2235/96C04B2235/9607F16D2200/0052
Inventor 刘汝强杨川何留阳李宗乐
Owner 山东道普安制动材料有限公司
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