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Wet-type composite friction material and preparation method thereof

A composite friction material and wet technology, applied in the field of composite friction materials, can solve the problems of inability to meet the use requirements of wet clutches, large fluctuations in friction coefficient, low friction coefficient, etc., to achieve good durability and reliability, stable friction coefficient, thermodynamics good performance

Inactive Publication Date: 2014-07-23
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these wet friction materials still have problems such as low friction coefficient, large amount of wear, large fluctuation of friction coefficient with the change of working conditions, and contamination of lubricating oil, which cannot meet the use requirements of various heavy-duty vehicles and construction machinery wet clutches.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The weight of each component of the wet composite friction material: 400 grams of carbon fiber cloth, 100 grams of epoxy resin with an epoxy value of 0.24, 50 grams of ethylenediamine, 10 grams of nano-SiC ceramic particles with a particle size of 20nm, and 100 grams of acetone.

[0041] Preparation Process:

[0042] (1) Ultrasonic disperse the above-mentioned epoxy resin, ethylenediamine, nano-SiC ceramic particles, and acetone for 20 minutes, and mix them evenly to form an impregnation solution. During the mixing process, keep the temperature of the impregnation solution at about 30°C;

[0043] (2) Soak the carbon fiber cloth in the prepared impregnation solution for 10 minutes, then take out the carbon fiber cloth and put it in a blast drying oven at 50°C for 36 hours;

[0044] (3) Put 3 layers of soaked and dried carbon fiber cloth into a flat vulcanizer and heat press at 130°C for 30 minutes. During the hot pressing process, the temperature rise is lower than 6°C, ...

Embodiment 2

[0048] The weight of each component of the wet composite friction material: 800 grams of carbon fiber cloth, 300 grams of epoxy resin with an epoxy value of 0.45, 80 grams of anhydride, 50 grams of nano-TiC ceramic particles with a particle size of 100 nm, and 450 grams of absolute ethanol.

[0049] Preparation Process:

[0050] (1) Ultrasonic disperse the above-mentioned epoxy resin, ethylenediamine, nano-TiC ceramic particles, and absolute ethanol for 25 minutes, and mix them evenly to form an impregnation solution. During the mixing process, keep the temperature of the impregnation solution at about 50°C ;

[0051] (2) Soak the carbon fiber cloth in the prepared impregnation solution for 20 minutes, then take out the carbon fiber cloth and put it in a blast drying oven at 90°C for 18 hours;

[0052] (3) Put 10 layers of soaked and dried carbon fiber cloth into a flat vulcanizer and heat-press at 160°C for 10 minutes. During the hot-pressing process, the temperature rises bel...

Embodiment 3

[0056] The weight of each component of the wet composite friction material: 600 grams of carbon fiber cloth, 150 grams of epoxy resin with an epoxy value of 0.3, 60 grams of ethylenediamine, and nano-TiB with a particle size of 40nm 2 20 grams of ceramic particles, 150 grams of acetone.

[0057] making process:

[0058] (1) Mix the epoxy resin, ethylenediamine, nano-TiB 2 Ceramic particles and acetone were ultrasonically dispersed for 25 minutes, and mixed evenly to form an impregnating liquid, and the temperature of the impregnating liquid was kept at about 40°C during the mixing process;

[0059] (2) Soak the carbon fiber cloth in the prepared impregnation solution for 13 minutes, then take out the carbon fiber cloth and put it in a blast drying oven for 20 hours at 60°C;

[0060] (3) Put 4 layers of soaked and dried carbon fiber cloth into a flat vulcanizer and heat press at 135°C for 25 minutes. During the hot pressing process, the temperature rise is lower than 6°C, and...

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Abstract

The invention provides a wet-type composite friction material and a preparation method thereof. The wet-type composite friction material comprises the following components in parts by weight: 40-80 parts of carbon fiber cloth which is used as a material framework, 10-30 parts of thermosetting resin, 8-15 parts of curing agent and 1-5 parts of friction performance adjusting agent, as well as 10-45 parts of solvent. The preparation method comprises the following steps of: sequentially mixing phenolic resin, ethanediamine and ceramic grains by taking acetone or absolute ethyl alcohol as the solvent; carrying out ultrasonic dispersion to prepare a uniformly-mixed immersing solution with a moderate viscosity; and then, immersing the carbon fiber cloth, drying and carrying out hot-pressing curing and subsequent curing heat treatment on the carbon fiber cloth. The wet-type composite friction material and the preparation method thereof have the advantages of simple process, high material strength, high and stable wet-type movable and static friction coefficients, and extremely good durability and reliability.

Description

technical field [0001] The invention relates to a composite friction material, in particular to a wet composite friction material which can be used for power transmission and braking in oil, especially transmission oil of vehicles, engineering machinery and ships, and a preparation method thereof. Background technique [0002] Wet friction materials are widely used in vehicles, construction machinery, mining machinery and military equipment due to their good heat dissipation performance, small wear, and stable friction factors. At present, the commonly used wet friction materials include copper-based friction materials, paper-based friction materials and composite materials. The commonly used wet friction materials are mainly sintered bronze friction materials and paper-based friction materials, and composite friction materials are still in the development stage. At present, the research and development of wet friction materials has achieved certain results, and the friction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K7/00C08K7/06C08K3/04C08K3/34C08K3/14C08K3/38C08J5/14C09K3/14
Inventor 尹彩流王秀飞蓝奇文国富庞兴志
Owner GUANGXI UNIV FOR NATITIES
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