Carbon ceramic brake shoe for urban rail vehicle and manufacturing method thereof

A technology for urban rail and urban rail vehicles, applied in the field of carbon fiber reinforced ceramic-based friction materials, can solve the problems of unstable braking performance, poor thermal stability, low braking power, etc., to ensure reliability and safety, friction The effect of stable coefficient and smooth braking

Active Publication Date: 2012-09-12
HUNAN SHIXIN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Early high-phosphorus cast iron brake shoes were mainly used in ordinary non-speed-raising trains. Due to the increase in thermal load and temperature during high-speed braking, the braking performance was unstable and the braking power was low.
Organic synthetic brake shoes are made of resin, rubber, metal powder and lubricating materials mixed and hot-pressed. They have light specific gravity and excellent room temperature performance. They are widely used in urban rail vehicles, but their main disadvantage is poor thermal stability. Large attenuation

Method used

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  • Carbon ceramic brake shoe for urban rail vehicle and manufacturing method thereof
  • Carbon ceramic brake shoe for urban rail vehicle and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Carbon-ceramic brake shoes for urban rail vehicles, with continuous carbon fibers as reinforcing fibers, pyrolytic carbon and SiC ceramic materials as matrix materials, pyrolytic carbon matrix prepared by chemical vapor infiltration method, ceramics prepared by directional molten silicon infiltration method matrix.

[0046] see figure 1 , the method for manufacturing carbon ceramic brake shoes for urban rail vehicles is as follows:

[0047] (1) Made of PAN-type T700 (12K) carbon fiber produced by Toray, Japan, with a density of 0.46g / cm 3 carbon fiber prefabricated body;

[0048] (2) The carbon fiber prefabricated body is subjected to a high-temperature heat treatment at 1600°C for 20 hours, with slight positive pressure and argon inert gas protection;

[0049] (3) Natural gas is used as the carbon source gas, hydrogen is used as the dilution gas, and the volume ratio of natural gas and hydrogen is 1:3. The carbon matrix is ​​deposited at 1000°C by chemical vapor inf...

Embodiment 2

[0057] Carbon-ceramic brake shoes for urban rail vehicles, with continuous carbon fibers as reinforcing fibers, pyrolytic carbon and SiC ceramic materials as matrix materials, pyrolytic carbon matrix prepared by chemical vapor infiltration method, ceramics prepared by directional molten silicon infiltration method matrix.

[0058] The method for making urban rail vehicle carbon ceramic brake shoe is as follows:

[0059] (1) Made of PAN-type T700 (12K) carbon fiber produced by Toray, Japan, with a density of 0.55g / cm 3 carbon fiber prefabricated body;

[0060] (2) Under an argon protective atmosphere, the preform is subjected to a high-temperature heat treatment at 1600°C for 18 hours, with slight positive pressure and argon inert gas protection;

[0061] (3) Propylene is used as the carbon source gas, hydrogen is used as the dilution gas, and the volume ratio of propylene to hydrogen is 1:2. The pyrolytic carbon matrix is ​​deposited on the preform at 1100 ° C by chemical va...

Embodiment 3

[0068] Carbon-ceramic brake shoes for urban rail vehicles, with continuous carbon fibers as reinforcing fibers, pyrolytic carbon and SiC ceramic materials as matrix materials, pyrolytic carbon matrix prepared by chemical vapor infiltration method, ceramics prepared by directional molten silicon infiltration method matrix.

[0069] The method for making urban rail vehicle carbon ceramic brake shoe is as follows:

[0070] (1), Acupuncture carbon fiber integral felt:

[0071] The single-layer 0° non-weft cloth, tire mesh, 90° non-weft cloth, and tire mesh are superimposed in sequence, and then the superimposed non-weft cloth and mesh tire are repeatedly needled with barbs to make a carbon fiber whole Felt having a density of 0.40 g / cm 3 ;

[0072] (2) The carbon fiber prefabricated body is subjected to high-temperature heat treatment at 900°C, the whole time is 8 hours, under slight positive pressure, and protected by argon inert gas;

[0073] (3) Using methane as the carbon ...

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Abstract

The invention discloses a carbon ceramic brake shoe for an urban rail vehicle and a manufacturing method thereof. In the method, a continuous carbon fiber is taken as an enhanced fiber; pyrolytic carbon and an SiC ceramic material are taken as substrates; a pyrolytic carbon substrate is prepared with a chemical gas phase osmosis process; a ceramic substrate is prepared by adopting an orientation fused silicon impregnation method; and the ceramic substrate comprises the following components in percentage by weight: 12-24 percent of carbon fiber, 16-32 percent of pyrolytic carbon, 18-46 percentof silicon carbide, 6-19 percent of silicon-copper compound, 1-5 percent of titanized carbon and 2-12 percent of simple substance copper. The carbon ceramic brake shoe for the urban rail vehicle has higher heat resistance, wear resistance, moderate friction coefficient, stable braking and high environmental suitability. The manufacturing method is simple and practicable.

Description

technical field [0001] The invention relates to a rail transit vehicle accessory, in particular to a carbon fiber reinforced ceramic-based friction material for urban rail vehicle brake shoes. Background technique [0002] With the rapid development of my country's automobile industry in the past ten years, the congestion and difficulty of urban traffic and urban roads have become the main contradiction in urban planning and development. Developing urban rail transit (mainly including subway, light rail, maglev and tram, etc.) and establishing an intercity rail network are important means to solve urban public welfare transportation and ensure smooth transportation. As of 2011, 31 urban rail transit plans have been approved. During the "Twelfth Five-Year Plan" period, urban rail transit will be built and put into operation for about 2,500 kilometers, with an average annual distance of about 500 kilometers. By the end of 2020, the total mileage of urban rail transit will reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/80C04B35/565F16D65/02
Inventor 李专肖鹏
Owner HUNAN SHIXIN NEW MATERIALS CO LTD
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