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Friction material composition, high-speed train brake pad prepared from same and application of friction material composition

A technology of friction materials and brake pads, applied in friction linings, mechanical equipment, other chemical processes, etc., can solve the problems of scratching the brake disc surface, brake disc wear, broken abrasive particles, etc., and achieve low wear rate , improve the service life, heat damage and wear less effect

Inactive Publication Date: 2019-10-29
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since ceramics belong to the hard and brittle phase, they are prone to breakage and abrasive wear when subjected to force. Large ceramic particles will also scratch the surface of the brake disc, resulting in serious wear of the brake disc.

Method used

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Examples

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preparation example Construction

[0029] Another embodiment of the present invention is a method for preparing special brake pads for high-speed trains, including the following steps:

[0030] (1) Ingredients: Weigh the powder metallurgy friction material of the present invention as the raw material, and reserve it for use;

[0031] (2) Mixing: Put the weighed raw materials in step (1) in a ball mill, add an appropriate amount of binding material and ball mill and mix to obtain a mixture;

[0032] (3) Pressing: performing mold pressing on the mixture obtained in step (2) to obtain a compacted body;

[0033] (4) Pressure sintering: the pressed body obtained in step (3) is placed in a vacuum sintering furnace for pressure sintering. The pressurization is to pressurize the pressed body by hydraulic pressure to obtain special brake pads for high-speed trains.

[0034] In this embodiment, in step (4), the compacted body obtained in step (3) is placed in a vacuum sintering furnace, and hydraulic pressure is used to pressurize...

Embodiment

[0042] The high-speed train brake pads containing copper-based powder metallurgy friction material composition are made of the following raw materials:

[0043] Matrix components: 1000 mesh electrolytic copper powder, 47% by weight; 1000 mesh reduced iron powder, 16% by weight;

[0044] Lubricating components: 100 mesh artificial graphite powder, 18% by weight; 300 nanometer molybdenum disulfide powder, 2% by weight; 500 nanometer calcium fluoride powder, 5% by weight.

[0045] Friction components: 100 mesh chromium powder, 7 wt%; 1 micron silicon carbide powder, 2 wt%; 1 nanometer silicon carbide powder, 1 wt%.

[0046] Friction stability component: 80 mesh natural flake graphite powder, 2% by weight;

[0047] The preparation method includes the following steps:

[0048] (1) Ingredients: Weigh the raw materials of each component according to the predetermined weight percent distribution ratio, and reserve;

[0049] (2) Mixing: Put the weighed component raw materials in step (1) in a ball...

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Abstract

The invention relates to a friction material composition, a high-speed train brake pad prepared from the same and an application of the friction material composition, wherein a copper-based friction material composition is prepared by adopting a powder metallurgy technology; the friction material composition is prepared from the following raw materials: a matrix component, a lubricating component,an anti-friction component and a friction stabilizing component; and a preparation method of the high-speed train brake pad comprises: burdening, mixing, briquetting and pressurized sintering. The brake pad prepared by using the preparation method is resistant to high temperature, little in heat fading, high and stable in friction coefficient, low in wear rate, low in heat damage and wear to thesurface of a counterpart and capable of prolonging the service life of a braking system and improving the reliability and economic efficiency of the braking system.

Description

Technical field [0001] The invention belongs to the technical field of high-speed train devices, and specifically relates to a friction material composition and a high-speed train brake pad prepared by using the friction material composition and application thereof. Background technique [0002] Railway is an important infrastructure of the country. In order to ensure the safe operation of high-speed EMUs, a stable and good braking system must be provided. When braking, the brake pads convert the huge kinetic energy generated by the train into heat through friction. Therefore, the brake pads are required to have high mechanical strength, good heat resistance and thermal conductivity, anti-sticking properties, reliability, and stable friction performance. , Low wear and other characteristics. With the vigorous development of my country's high-speed railway construction, the operating speed of trains will continue to increase, and the service conditions will become more stringent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14C22C1/05C22C30/02C22C32/00B22F1/00B22F3/14F16D69/02
CPCB22F1/0003C09K3/149C22C1/05C22C1/0425C22C30/02C22C32/0084B22F3/14F16D69/02F16D2200/00B22F2998/10B22F3/02
Inventor 丁春华丁永超王亚平丁毅高阳
Owner XI AN JIAOTONG UNIV
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