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A kind of technological method of rapidly preparing carbon-carbon brake disc

A technology of carbon-carbon brake discs and carbon brake discs, which is applied in the field of brake disc manufacturing, can solve the problems of high cost and long time-consuming preparation of brake discs, and achieve the effects of shortening the production cycle, reducing costs and increasing the diffusion rate

Active Publication Date: 2022-05-06
德翼高科(杭州)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a process for quickly preparing carbon-carbon brake discs, which solves the problems of long time-consuming and high cost in the preparation of existing brake discs

Method used

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  • A kind of technological method of rapidly preparing carbon-carbon brake disc

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: A process for rapidly preparing carbon-carbon brake discs. In view of the long production cycle of aircraft carbon / carbon brake discs prepared by the current constant temperature CVD process, this example uses the temperature shock CVD method to prepare aircraft carbon / carbon brake discs ,Such as figure 1 As shown, the specific steps are as follows:

[0022] 1) According to the actual specific size of the aircraft carbon / carbon composite brake disc, prepare the carbon fiber prefabricated body of the brake disc, and perform high-temperature heat treatment on it, the temperature is 1600 ° C, and keep it warm for 1 hour; put the heat-treated carbon fiber prefabricated body into the CVD furnace In the process, the temperature of the furnace is raised to 820°C, and then the vapor deposition gas source gas is introduced to carry out CVD deposition for 200 hours, and the pressure in the deposition furnace is 3Kpa;

[0023] 2) The deposited carbon fiber preform is t...

Embodiment 2

[0027] Example 2: A process for rapidly preparing carbon-carbon brake discs. In view of the long production cycle of aircraft carbon / carbon brake discs prepared by the current constant temperature CVD process, this example uses the temperature shock CVD method to prepare aircraft carbon / carbon brake discs ,Such as figure 1 As shown, the specific steps are as follows:

[0028] 1) According to the actual specific size of the aircraft carbon / carbon composite brake disc, prepare the carbon fiber prefabricated body of the brake disc, and perform high-temperature heat treatment on it, the temperature is 2000 ° C, and keep it warm for 1 hour; put the heat-treated carbon fiber prefabricated body into the CVD furnace , first raise the furnace temperature to 850°C, then feed carbon source gas for 300h of CVD deposition;

[0029] 2) The deposited carbon fiber preform is taken out and machined to remove the deposited dense layer on the surface, and then heat treated at 2000°C for 1.25h; ...

Embodiment 3

[0033] Example 3: A process for quickly preparing carbon-carbon brake discs. In view of the long production cycle of aircraft carbon / carbon brake discs prepared by the current constant temperature CVD process, this example uses the temperature shock CVD method to prepare aircraft carbon / carbon brake discs. ,Such as figure 1 As shown, the specific steps are as follows:

[0034] 1) According to the actual specific size of the aircraft carbon / carbon composite brake disc, prepare the carbon fiber prefabricated body of the brake disc, and perform high-temperature heat treatment on it, the temperature is 1800°C, and hold for 1.25h; put the heat-treated carbon fiber prefabricated body into the CVD furnace In the process, first make the furnace temperature rise to 850°C, then feed carbon source gas, and carry out CVD deposition for 250h;

[0035] 2) The deposited carbon fiber preform is taken out and machined to remove the deposited dense layer on the surface, and then heat treated a...

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Abstract

The invention discloses a process method for rapidly preparing carbon-carbon brake discs, which comprises putting a heat-treated carbon fiber prefabricated body into a CVD furnace, raising the temperature of the furnace to 800-950°C at a heating rate of 10°C / min, and then passing the Enter the carbon source gas, and carry out CVD deposition for 50 hours; then turn off the carbon source gas, stop the CVD deposition, and lower the furnace temperature to 200-250°C at a cooling rate of 10°C / min; when the furnace temperature drops to 200-250°C, Then raise the furnace temperature to 1200-1600°C at a heating rate of 10°C / min, and after holding for 1 hour, lower the furnace temperature to 800-950°C at a cooling rate of 10°C / min, then turn on the carbon source gas for CVD deposition 50h, then turn off the carbon source gas, stop CVD deposition, and lower the furnace temperature to 200-250°C at a cooling rate of 10°C / min; repeat the above operations until the density of the carbon fiber preform increases to 1.75g / cm 3 As above, the desired carbon-carbon brake disc is obtained. The invention can greatly reduce the processing cycle of carbon-carbon brake discs, reduce energy consumption, and can be widely used in the manufacturing field of aircraft brake discs.

Description

technical field [0001] The invention relates to the technical field of brake disc manufacturing, in particular to a process method for quickly preparing carbon-carbon brake discs. Background technique [0002] Aircraft carbon / carbon composite brake discs are usually prepared by a constant temperature CVD process. During the CVD deposition process, since a dense carbon black hard shell is easily formed on the surface of the carbon / carbon brake disc blank, which blocks subsequent precipitation, it needs to be out of the furnace several times for mechanical processing. The hard shell on the surface is removed, and high-temperature heat treatment is performed to open the pores on the surface of the carbon disk to facilitate subsequent deposition. Such a process needs to be repeated for 4-5 cycles to deposit a density of 1.75 g / cm³. The current preparation process has a long production cycle. In general, the production cycle of a furnace of carbon / carbon composite brake discs ta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/83F16D65/12
CPCC04B35/83F16D65/126C04B2235/6562C04B2235/6567C04B2235/77
Inventor 杜东伟
Owner 德翼高科(杭州)科技有限公司