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Brake pad for high-speed EMU and preparation method thereof

A high-speed EMU, brake pad technology, applied in other manufacturing equipment/tools, engine components, turbines, etc., can solve the problem of multiple scratches on the surface of the brake disc, furrows, can not meet the requirements of limiting element content, manufacturing The problem of large wear on the surface of the moving plate can achieve the effect of small fluctuation of friction coefficient, stable friction performance and low wear amount.

Active Publication Date: 2021-12-17
上海连纵轨道交通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above formula is mainly copper, contains eutectoid steel grinding powder, and the friction component is mainly silicon dioxide; although the brake pads prepared with this formula have the characteristics of high friction coefficient and low wear under high-speed braking conditions, However, due to the high content of hard particle silica, the brake pads have a greater wear on the surface of the brake disc, and with the passage of service time, more scratches, furrows, etc. will occur on the surface of the brake disc. damage
Moreover, the silicon dioxide content in the above formula is as high as 4-6 parts by weight, which cannot meet the requirements on the content of restricted elements in the standard TJ / CL307-2019 "Temporary Technical Conditions for Brake Plates of EMUs"

Method used

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  • Brake pad for high-speed EMU and preparation method thereof
  • Brake pad for high-speed EMU and preparation method thereof
  • Brake pad for high-speed EMU and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The high-speed EMU brake pad of the present embodiment comprises the following raw material components:

[0030] 35 parts by weight of copper powder, 10 parts by weight of nano-copper wire, 13 parts by weight of iron powder, 10 parts by weight of ferrochrome powder, 10 parts by weight of zircon sand, 1 part by weight of iron boron powder, 5 parts by weight of ferromolybdenum powder, 1.5 parts by weight of silicon carbide powder Parts by weight: 3 parts by weight of molybdenum disulfide powder; 5 parts by weight of natural granular graphite, 8 parts by weight of natural flake graphite, and 1 part by weight of artificial granular graphite.

[0031] The copper powder is electrolytic copper powder with a particle size of 45-75 μm.

[0032] The iron powder is reduced iron powder with a purity of ≥98% and a particle size of 45-75 μm.

[0033] The ferrochrome powder is a medium-carbon ferrochrome powder, wherein the chromium content is 60%, the carbon content is 1%, and the p...

Embodiment 2

[0045] The high-speed EMU brake pad of the present embodiment comprises the following raw material components:

[0046] 45 parts by weight of copper powder, 5 parts by weight of nano-copper wire, 10 parts by weight of iron powder, 12 parts by weight of ferrochrome powder, 3 parts by weight of zircon sand, 3 parts by weight of iron boron powder, 1 part by weight of ferromolybdenum powder, 5 parts by weight of silicon carbide powder Parts by weight: 0.5 parts by weight of molybdenum disulfide powder; 15 parts by weight of natural granular graphite, 1 part by weight of natural flake graphite, and 3 parts by weight of artificial granular graphite.

[0047] The copper powder is reduced copper powder with a particle size of 45-75 μm.

[0048] The iron powder is reduced iron powder with a purity of ≥98% and a particle size of 45-75 μm.

[0049] The ferrochrome powder is a high-carbon ferrochrome powder, wherein the chromium content is 72%, the carbon content is 6%, and the particle ...

Embodiment 3

[0061] The high-speed EMU brake pad of the present embodiment comprises the following raw material components:

[0062] 40 parts by weight of copper powder, 8 parts by weight of nano copper wire, 6 parts by weight of iron powder, 15 parts by weight of ferrochrome powder, 6 parts by weight of zircon sand, 5 parts by weight of iron boron powder, 3 parts by weight of ferromolybdenum powder, 3 parts by weight of silicon carbide powder Parts by weight: 1.5 parts by weight of molybdenum disulfide powder; 10 parts by weight of natural granular graphite, 3 parts by weight of natural flake graphite, and 5 parts by weight of artificial granular graphite.

[0063] The copper powder is water atomized copper powder with a particle size of 45-75 μm.

[0064] The iron powder is reduced iron powder with a purity of ≥98% and a particle size of 45-75 μm.

[0065] The ferrochrome powder is high-carbon ferrochrome powder, wherein the chromium content is 65%, the carbon content is 10%, and the pa...

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Abstract

The invention provides a high-speed EMU brake pad and a preparation method thereof, belonging to the technical field of brake pad manufacturing; the raw material formula of the brake pad of the present invention includes the following components: copper powder, nano-copper wire, iron powder , ferrochrome powder, zirconium sand, ferromolybdenum powder, ferroboron powder, silicon carbide powder, molybdenum disulfide powder, natural granular graphite, natural flake graphite, artificial granular graphite; each raw material component is fully mixed and pressed into shape The brake pad of the present invention is obtained after the obtained body is hot-pressed and sintered and isothermally cooled. The friction coefficient of the brake pad of the present invention is stable, and the wear rate of the material is low; the thermal conductivity of the material is good, which can effectively reduce the adhesion of the friction material on the brake disc during the braking process, and cause less damage to the brake disc .

Description

technical field [0001] The invention relates to the manufacturing technology of brake pads, in particular to a brake pad for a high-speed EMU and a preparation method thereof, and belongs to the technical field of high-speed train brake equipment manufacturing and production. Background technique [0002] At present, copper-based powder metallurgy brake pads are widely used in high-speed train brake pads. With the rapid development of China's high-speed rail, the braking speed is gradually increasing, and the braking load is increasing; the working temperature and stress on the surface of copper-based powder metallurgy brake pads are gradually increasing. According to the requirements of the "Special Test Outline for EMU New Brake Application Assessment Emergency Braking", when a train running at a speed of 300km / h brakes in an emergency, the friction braking system must be able to stop the train within a braking distance of 3800m. Huge kinetic energy is consumed during the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/02B22F3/14B22F5/00C22C9/00C22C32/00
CPCB22F1/0003B22F5/00B22F3/02B22F3/14C22C9/00C22C32/0005
Inventor 罗明良
Owner 上海连纵轨道交通科技有限公司