Method for manufacturing IMC (Intermetallic Compound) silicon nitride ceramic-based composite brake pad

A technology of silicon nitride ceramics and a manufacturing method, which is applied to friction linings, mechanical equipment and other directions, can solve problems such as friction overheating and wear, and achieve the effects of low average wear rate, simple process and excellent friction coefficient

Inactive Publication Date: 2012-05-02
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned existing automobile brake pads in the process of automobile braking due to frictional overheating and severe wear, the present invention provides a method for manufacturing an IMC silicon nitride ceramic matrix composite brake pad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Will Fe 3 Al / Si 3 N 4 The composite material was added to a planetary high-energy ball mill with a resin tank as a ball mill for ball milling and mixing. The ball milling time was 4 hours, and the ball mill speed was 380 r / min; the prepared Fe 3Al / Si 3 N 4 The composite material was ground to a fineness of 1200 mesh, and then the Fe 3 Al / Si 3 N 4 82 parts of composite material, 15 parts of graphite powder, Al 2 o 3 3 parts of powder, mixed evenly in a ball mill, and placed in a 60cm×60cm×20cm graphite mold, vacuum hot pressing sintering temperature: 1300°C, heating rate: 5-20°C / min, axial pressure: 5-20 MPa, holding time: 10-60min, after cooling naturally with the furnace; that is, Fe 3 Al / Si 3 N 4 Based on the raw material of composite brake pads, according to the size of the automobile brake pads, use a diamond cutting machine or a wire electric discharge machine to 3 Al / Si 3 N 4 The base composite brake pad raw material is processed and cut into small a...

Embodiment 2

[0026] Preparation of Fe by Mechanical Alloying 3 Al / Si 3 N 4 composite material, and the prepared Fe 3 Al / Si 3 N 4 The composite material was ground to a fineness of 1200 mesh, and then the Fe 3 Al / Si 3 N 4 92 parts of composite material, 5 parts of graphite powder, Al 2 o 3 3 parts of powder are ball milled and mixed evenly, placed in a graphite mold of 60cm×60cm×20cm, vacuum hot-pressed and sintered to 1350°C, the heating rate is 15°C / min, the axial pressure is 5-20 MPa, and the holding time is 10-60min , the product naturally cooled with the furnace is Fe 3 Al / Si 3 N 4 According to the tonnage of medium-sized automobiles, the required brake pads are designed, and the obtained Fe 3 Al / Si 3 N 4 The base composite brake pad raw material is processed into an automobile brake pad of suitable shape, which is the final product, and is used for a medium-sized automobile brake pad of 1.5 tons.

Embodiment 3

[0028] Preparation of Fe by Mechanical Alloying 3 Al / Si 3 N 4 Composite material, the prepared Fe 3 Al / Si 3 N 4 The composite material was ground to a fineness of 1200 mesh, and the Fe 3 Al / Si 3 N 4 87 parts of composite material, 10 parts of graphite powder, Al 2 o 3 Mix 3 parts of the powder by ball milling evenly, place in a graphite mold of 100cm×100cm×30cm, carry out vacuum hot pressing and sintering to 1350°C, heating rate: 12°C / min, axial pressure: 10 MPa, holding time: 40min , the product naturally cooled with the furnace is Fe 3 Al / Si 3 N 4 According to the design requirements of automobile brakes, the raw materials obtained above are processed into a suitable shape, which is the final product, which is used as brake discs and drum pads for small and medium-sized automobiles.

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Abstract

The invention relates to a method for manufacturing an IMC (Intermetallic Compound) silicon nitride ceramic-based composite brake pad. The method comprises the following steps of: carrying out mechanical alloying on an Fe3Al / Si3N4 composite material, then grinding to 1200 meshes, then mixing the Fe3Al / Si3N4 composite material, graphite powder and Al2O3 powder, and carrying out vacuum hotpressing and sintering in a die to obtain an Fe3Al / Si3N4-based composite brake pad raw material; and machining the brake pad raw material into a corresponding brake pad, and manufacturing the Fe3Al / Si3N4-basedcomposite brake pad through high-temperature pressing and laminating. The method for manufacturing the IMC silicon nitride ceramic-based composite brake pad, disclosed by the invention, has the advantages of low manufacturing cost, simple process, lower mating plate friction loss and capability of keeping a favorable braking effect still after continuously braking for a long time.

Description

technical field [0001] The invention relates to a method for manufacturing a composite brake pad, in particular to a method for manufacturing an automobile brake pad with an iron-aluminum intermetallic compound as a matrix. Background technique [0002] Automobile brake pads are important functional parts to control and ensure the safe driving of automobiles. In recent years, the development of highway and railway transportation has accelerated the process of high-speed and heavy-duty transport machinery such as automobiles and trains, thus putting forward higher requirements for the performance of friction materials in braking devices. The increase in vehicle speed requires friction materials to have stable friction performance over a wide range of speeds and temperatures. [0003] In the prior art, most of the existing brake pad materials are made of metal, and there are defects such as long-term brake friction and heat generation, softening of the brake pad metal, and re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/04B22F3/14C22C29/16C22C32/00C22C1/05F16D69/02
Inventor 田晓峰张卫珂张敏高利珍
Owner TAIYUAN UNIV OF TECH
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