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Copper-based powder metallurgy brake pad material as well as preparation method and application thereof

A technology of powder metallurgy and brake pads, which is applied in the fields of copper-based powder metallurgy brake pad materials and its preparation, and brake pad materials and its preparation, can solve the problems that the comprehensive performance of brake pad materials cannot meet the requirements of high-speed train brake friction pads Achieve excellent plasticity, improve stability, and reduce adhesive wear

Active Publication Date: 2018-06-05
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: Aiming at the problem that the comprehensive performance of existing brake pad materials cannot meet the requirements of high-speed train brake friction pads, the present invention provides a copper-based powder metallurgy brake pad material with better comprehensive performance and its preparation method, and provides the Application of brake pad material for preparing brake pad and preparation method of brake pad

Method used

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  • Copper-based powder metallurgy brake pad material as well as preparation method and application thereof
  • Copper-based powder metallurgy brake pad material as well as preparation method and application thereof
  • Copper-based powder metallurgy brake pad material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A copper-based powder metallurgy brake pad material is made of the following raw materials in proportions by weight:

[0022] Copper powder 67wt%,

[0023] Graphite 13wt%,

[0024] Iron powder 4wt%,

[0025] Fe-chromium alloy 14wt%,

[0026] SiC 1wt%,

[0027] Silica 1 wt%.

[0028] The particle sizes of the above materials are respectively:

[0029] Copper powder 400 mesh,

[0030] Graphite 0.2~0.8mm,

[0031] Iron powder 40 mesh,

[0032] Iron chromium alloy 200 mesh,

[0033] Silicon carbide 500 mesh,

[0034] Silica 5 μm.

[0035] Weigh the powder raw material according to the above raw material ratio, put it into the mixer and mix evenly; put the mixed raw material into the graphite mold, control the sintering temperature in the discharge plasma sintering furnace to 800°C, and the heating rate to 100°C / min, the holding time is 20min, the pressure applied to the mold is 50MPa, and the vacuum is maintained during sintering and cooling; after the preparati...

Embodiment 2

[0038] A copper-based powder metallurgy brake pad material is made of the following raw materials in proportions by weight:

[0039] Copper powder 67wt%,

[0040] Graphite 13wt%,

[0041] Iron powder 10wt%,

[0042] Fe-chromium alloy 8wt%,

[0043] SiC 1wt%,

[0044] Silica 1 wt%.

[0045] The particle sizes of the above materials are respectively:

[0046] Copper powder 400 mesh,

[0047] Graphite 0.2~0.8mm,

[0048] Iron powder 40 mesh,

[0049] Iron chromium alloy 200 mesh,

[0050] Silicon carbide 500 mesh,

[0051] Silica 5 μm.

[0052] Weigh the powder raw material according to the above raw material ratio, put it into the mixer and mix it evenly; put the mixed raw material into the graphite mold, control the sintering temperature in the discharge plasma sintering furnace to 810°C, and the heating rate to 100°C / min, the holding time is 20min, the pressure applied to the mold is 45MPa, and the vacuum is maintained during sintering and cooling; after the prepar...

Embodiment 3

[0055] A copper-based powder metallurgy brake pad material is made of the following raw materials in proportions by weight:

[0056]Copper powder 58wt%,

[0057] Graphite 13wt%,

[0058] Iron powder 17wt%,

[0059] Fe-chromium alloy 8wt%,

[0060] SiC 2wt%,

[0061] Silica 2wt%.

[0062] The particle sizes of the above materials are respectively:

[0063] Copper powder 400 mesh,

[0064] Graphite 0.2~0.8mm,

[0065] Iron powder 40 mesh,

[0066] Iron chromium alloy 200 mesh,

[0067] Silicon carbide 500 mesh,

[0068] Silica 5 μm.

[0069] Weigh the powder raw materials according to the above raw material ratio, put them into the mixer and mix evenly; put the mixed raw materials into the graphite mold, control the sintering temperature in the discharge plasma sintering furnace to 820°C, and the heating rate to 100°C / min, the holding time is 20min, the pressure applied to the mold is 40MPa, and the vacuum is maintained during sintering and cooling; after the prepara...

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Abstract

The invention discloses a copper-based powder metallurgy brake pad material as well as a preparation method and application thereof. The copper-based powder metallurgy brake pad material is prepared from the following raw materials in percentage by weight: 54 weight percent to 67 weight percent of copper powder, 13 weight percent of graphite, 4 weight percent to 17 weight percent of iron powder, 8weight percent to 14 weight percent of a ferrochrome alloy, 1 weight percent to 4 weight percent of silicon carbide and 1 weight percent to 4 weight percent of silicon dioxide; the preparation methodof the copper-based powder metallurgy brake pad material comprises the following steps: 1) weighing the raw materials according to the ratio and putting the raw materials into a mixer and uniformly mixing; 2) filling the mixed raw materials into a mold; carrying out hot pressing sintering or spark plasma sintering under the protection of a vacuum atmosphere or nitrogen gas to obtain the brake padmaterial with excellent comprehensive performance. The prepared brake pad material has high density and rigidity, stable friction coefficient, abrasion resistance and excellent comprehensive performance, and can meet the requirements on braking friction plates of high-speed rail trains. The copper-based powder metallurgy brake pad material disclosed by the invention can be used for preparing a brake pad; the preparation method comprises the following steps: taking Q235 as a base material, and compounding and sintering the raw materials for preparing the copper-based powder metallurgy brake pad material and the base material through a hot pressing sintering technology, so as to obtain the brake pad.

Description

technical field [0001] The invention relates to a brake pad material and its preparation method and application, in particular to a copper-based powder metallurgy brake pad material and its preparation method and application, belonging to the technical field of powder metallurgy brake pads. Background technique [0002] With the advancement of science and technology, the speed of high-speed railways has been continuously improved, and the conditions for the use of brake devices have become more and more stringent. People require brake devices to stop the high-speed rail in a short time, which will cause huge high-speed rail Kinetic energy is converted into frictional heat energy of the brake pads, and the surface of the friction pair will rise sharply, which will affect the friction coefficient of the friction material and reduce the safety and reliability of the high-speed rail. Therefore, in order to meet the comprehensive technical indicators of high-speed railways, it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C32/00C22C1/05C22C1/10B22F3/105B22F3/14
Inventor 戴挺韩丽娜虞涛童蔚苹
Owner SOUTHEAST UNIV
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