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A preparation method of ceramic reinforced carbon/carbon composite brake disc

A technology of carbon composite materials and brake discs, applied in the direction of brake discs, brake parts, brake types, etc., can solve the problems of carbon fiber silicification damage, loss of braking force, poor heat dissipation, etc., to reduce fiber damage, The effect of shortening the manufacturing cycle and improving the densification efficiency

Active Publication Date: 2020-06-30
HUNAN JINTIAN ALUMINUM HI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most brake discs are made of cast iron, and there are the following problems in practical application: (1) poor wear resistance and fast wear; (2) poor heat dissipation effect, and the braking force will be obvious due to heating after repeated braking (3) The weight is heavy, which is not conducive to the energy saving and consumption reduction of transportation equipment; (3) It is easy to rust, which not only affects the appearance, but also affects the braking performance
Among them, methods (1) and (3) have a long preparation process cycle, method (2) is likely to cause silicification damage to carbon fibers, and methods (4) and (5) prepare materials with low mechanical properties, which makes ceramic reinforced carbon / carbon composites Manufacture and popularization of moving discs are limited

Method used

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  • A preparation method of ceramic reinforced carbon/carbon composite brake disc

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Comparison scheme
Effect test

Embodiment 1

[0038] The preparation method of the ceramic reinforced carbon / carbon composite brake disc of the present invention comprises the following steps:

[0039] (1) Use carbon fiber to make a single layer of 0° non-weft cloth, 90° non-weft cloth and tire net, and lay them in the order of 0° no weft cloth-tire net-90° no weft cloth-tire net layer, and then introduce carbon fiber bundles in the direction perpendicular to the lay-up direction by needle punching to obtain a 2-dimensional needle punch with a density of 0.4g / cm 3 carbon fiber prefabricated body, the prefabricated body leaves a 2mm machining allowance;

[0040] (2) Put the carbon fiber prefabricated body of step (1) into the deposition furnace, pass into methane, hydrogen and nitrogen at a molar ratio of 1:0.8:1.5, and use chemical vapor infiltration process for pretreatment, the reaction temperature during pretreatment is 1200℃, the reaction time is 60h; the obtained density is 0.8g / cm 3 carbon / carbon brake disc reinfo...

Embodiment 2

[0045] The preparation method of the ceramic reinforced carbon / carbon composite brake disc of the present invention comprises the following steps:

[0046] (1) Use carbon fiber to make a single layer of 0° non-weft cloth, 90° non-weft cloth and tire net, and lay them in the order of 0° no weft cloth-tire net-90° no weft cloth-tire net layer, and then introduce carbon fiber bundles perpendicular to the lay-up direction by needle punching method to obtain 2.5-dimensional needle punching with a density of 0.42g / cm 3 carbon fiber prefabricated body, the prefabricated body leaves a machining allowance of 2.6mm;

[0047] (2) Put the carbon fiber prefabricated body of step (1) into the deposition furnace, pass into propylene, hydrogen and nitrogen at a molar ratio of 1:1.1:1.9, and use chemical vapor infiltration process for pretreatment. During pretreatment, the reaction temperature is 1225°C, the reaction time is 64h; the obtained density is 0.83g / cm 3 carbon / carbon brake disc re...

Embodiment 3

[0052] The preparation method of the ceramic reinforced carbon / carbon composite brake disc of the present invention comprises the following steps:

[0053] (1) Use carbon fiber to make a single layer of 0° non-weft cloth, 90° non-weft cloth and tire net, and lay them in the order of 0° no weft cloth-tire net-90° no weft cloth-tire net layer, and then introduce carbon fiber bundles in the direction perpendicular to the lay-up direction by needle punching to obtain a 3-dimensional needle punch with a density of 0.44g / cm 3 carbon fiber prefabricated body, the prefabricated body leaves a machining allowance of 3.2mm;

[0054] (2) Put the carbon fiber prefabricated body of step (1) into the deposition furnace, feed natural gas, hydrogen and nitrogen at a molar ratio of 1:1.4:2.3, and use chemical vapor infiltration process for pretreatment. The reaction temperature during pretreatment is 1250°C, the reaction time is 68h; the obtained density is 0.86g / cm 3 carbon / carbon brake disc...

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Abstract

The invention discloses a preparation method of a ceramic reinforced carbon / carbon composite material brake disc. The preparation method comprises the following steps that a carbon fiber prefabricatedbody is put into a deposition furnace, firstly, a chemical vapor-phase permeation process is adopted, then liquid-phase resin or liquid-phase asphalt is used for carrying out a dipping-carbonizationprocess, and a carbon / carbon composite material brake disc blank body is obtained; a liquid-phase siliconizing treatment is carried out on the blank body so as to obtain a disc body with the density of 2-2.2 g / cm<3>; and machining is carried out according to the shape and the size of the required brake disc so as to obtain the ceramic reinforced carbon / carbon composite material brake disc. According to the preparation method, the reasonable composition proportion and the preparation process are adopted, so that the high-quality ceramic reinforced carbon / carbon composite material brake disc with excellent mechanical property, oxidation resistance, friction resistance and wear resistance is prepared; the bake disc is light in weight, good in braking performance, short in production period and capable of realizing industrial production, the brake performance of a brake system of a transport vehicle can be improved, the weight of the brake system can be reduced, the service life of the brake disc is prolonged, and a good market prospect is achieved.

Description

technical field [0001] The invention relates to the technical field of braking devices for traffic equipment, and more specifically relates to a method for preparing a ceramic-reinforced carbon / carbon composite brake disc. Background technique [0002] Disc brakes are currently the most widely used brakes for automobiles and rail transit vehicles. They have a series of advantages such as relatively simple structure, convenient maintenance, stable braking effect, and fast system response. Brake disc is a key part of disc brake, which plays a vital role in the safe driving of automobiles and rail vehicles. At present, most brake discs are made of cast iron, and there are the following problems in practical application: (1) poor wear resistance and fast wear; (2) poor heat dissipation effect, and the braking force will be obvious due to heating after repeated braking (3) the weight is heavy, which is not conducive to the energy saving and consumption reduction of transportatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D65/12C04B35/84C04B35/52C04B35/622
CPCC04B35/52C04B35/622C04B35/83C04B2235/77C04B2235/96C04B2235/9607F16D65/125F16D2200/0047F16D2200/006F16D2200/0082F16D2200/0091
Inventor 刘春轩曹柳絮梁啟文蒋兆汝李清洲
Owner HUNAN JINTIAN ALUMINUM HI TECH CO LTD
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