High-speed train carbon ceramic braking material manufacturing method

The technology of a brake material and manufacturing method, which is applied in the manufacture of carbon ceramic brake materials, can solve the problems of small amount of Ti3SiC2 and uneven distribution, and achieve the effects of improving friction and wear energy, simple process, and improving thermal conductivity

Inactive Publication Date: 2018-04-20
山西西沟龙鼎新材料集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method reported in the literature is to introduce TiC into low-density C / C by slurry infiltration, and then use liquid phase Si to infiltrate and react to form TiC 3 SiC 2 , the Ti obtained by this method 3 SiC 2 The amount is relatively small and unevenly distributed

Method used

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  • High-speed train carbon ceramic braking material manufacturing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1, preparation of carbon fiber preform

[0025] Several layers of single-layer 0° non-weft cloth, tire mesh, 90° non-weft cloth, and tire mesh are superimposed in sequence to a thickness of 35mm, and the required carbon fiber prefabricated body is prepared by relay needling; the needling density is 25 needles / cm 2 , with a bulk density of ~0.4g / cm 3 , wherein the volume ratio of the tire mesh layer to the non-weft layer is about 1:1.

[0026] Step 2, Ti 3 SiC 2 Preparation of slurry

[0027] First take by weighing 110g of sodium carboxymethylcellulose (CMC) and dissolve it in 10kg of water to prepare a 1% sodium carboxymethylcellulose aqueous solution with a mass fraction. Weigh 8 kg of Ti with a particle size of ~2 μm 3 SiC 2 , adding 10kg mass fraction of 1% sodium carboxymethyl cellulose aqueous solution, ball milling for 48 hours to prepare Ti 3 SiC 2 Ti with a mass fraction of 44% 3 SiC 2 Slurry, adjust the pH value to 10.

[0028] Step 3, with Ti...

Embodiment 2

[0038] Step 1, preparation of carbon fiber preform

[0039] Several layers of single-layer 0° no-weft cloth, tire mesh, 90° no-weft cloth, and tire mesh are superimposed in sequence to a thickness of 35mm, and the required carbon fiber prefabricated body is prepared by relay needling; the needling density is 30 needles / cm 2 , with a bulk density of ~0.5g / cm 3 , wherein the volume ratio of the tire mesh layer to the non-weft layer is about 1:2.

[0040] Step 2, Ti 3 SiC 2 Preparation of slurry

[0041] First take by weighing 50g of sodium carboxymethyl cellulose and dissolve in 10kg of water to prepare a 0.5% sodium carboxymethyl cellulose aqueous solution. Weigh 10kg of Ti with a particle size of ~0.5μm 3 SiC 2 , adding 10kg mass fraction of 0.5% sodium carboxymethyl cellulose aqueous solution, ball milled for 48 hours to prepare Ti 3 SiC 2 Ti with a mass fraction of 50% 3 SiC 2 Slurry, adjust the pH value to 11.

[0042] Step 3, with Ti 3 SiC 2 Preparation of c...

Embodiment 3

[0052] Step 1, preparation of carbon fiber preform

[0053] Several layers of single-layer 0° no-weft cloth, tire mesh, 90° no-weft cloth, and tire mesh are superimposed in sequence to a thickness of 35mm, and the required carbon fiber prefabricated body is prepared by relay needling; the needling density is 30 needles / cm 2 , with a bulk density of ~0.55g / cm 3 , wherein the volume ratio of the tire mesh layer to the non-weft layer is about 1:3.

[0054] Step 2, Ti 3 SiC 2 Preparation of slurry

[0055] First take by weighing 110g of sodium carboxymethyl cellulose and dissolve in 10kg of water to prepare a 1% sodium carboxymethyl cellulose aqueous solution with a mass fraction. Weigh 12kg of Ti with a particle size of ~1μm 3 SiC 2 , adding 10kg mass fraction of 1% sodium carboxymethyl cellulose aqueous solution, ball milling for 48 hours to prepare Ti 3 SiC 2 Ti with a mass fraction of 55% 3 SiC 2 Slurry, adjust the pH value to 11.

[0056] Step 3, with Ti 3 SiC ...

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Abstract

The invention relates to a high-speed train carbon ceramic braking material manufacturing method, which comprises: preparing a carbon fiber preform and a Ti3SiC2 slurry, carrying out vacuum pressure impregnation on the carbon fiber preform by using the Ti3SiC2 slurry, depositing pyrolytic carbon in the carbon fiber preform containing Ti3SiC2 ceramic powder by using propylene or natural gas as a reaction gas to obtain a low-density carbon/carbon composite material containing Ti3SiC2 ceramic powder, and carrying out liquid phase siliconizing on the prepared low-density carbon/carbon composite material to obtain the carbon ceramic braking material with characteristics of high Ti3SiC2 content and uniform distribution. According to the present invention, the prepared material has advantages ofhigh toughness, high thermal conductivity, high-temperature resistance, oxidation resistance and good friction and wear property; and the method has advantages of simple process and good reproducibility, and is suitable for mass production.

Description

Technical field: [0001] The invention relates to a method for manufacturing a carbon-ceramic brake material, in particular to a method for manufacturing a carbon-ceramic brake material for a high-speed train (high-speed rail). Background technique: [0002] At present, the brake materials for high-speed trains are mainly powder metallurgy, cast steel and alloy steel. This material has the advantages of strong oil resistance, insensitivity to humid environment, mature production process, abundant raw materials, short production cycle and low cost; but There are disadvantages such as heavy weight, significant drop in high-temperature strength, and easy to rust, especially when continuous braking for a long time will cause thermal degradation of friction performance, which will affect the safety of the brake. As the speed of high-speed rail further increases, when the speed is higher than 400km / h, the brake temperature will exceed the limit of traditional brake materials (powde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/84C04B41/87
CPCC04B35/806C04B35/83C04B41/009C04B41/5096C04B41/87C04B2235/3826C04B2235/3843C04B2235/48C04B2235/77C04B2235/96C04B2235/9607C04B41/4523
Inventor 李建国靳素娟李宁牛超冯晓辉
Owner 山西西沟龙鼎新材料集团有限公司
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