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Material of high-wear-resistance ceramic automobile brake block and preparation method thereof

A brake pad, high wear-resistant technology, applied in chemical instruments and methods, friction linings, mechanical equipment, etc., can solve the problems of low thermal decay resistance, unstable friction performance at high temperature, low wear resistance, etc., to achieve Low noise, excellent wear resistance and low cost

Inactive Publication Date: 2012-08-15
龚亚云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a high-quality and cheap bauxite as the main High wear-resistant ceramic automobile brake pad material and preparation method thereof

Method used

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  • Material of high-wear-resistance ceramic automobile brake block and preparation method thereof
  • Material of high-wear-resistance ceramic automobile brake block and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Preparation of high wear-resistant ceramic automobile brake pads containing 52wt.% high-titanium bauxite homogeneous material.

[0024] Mass percentage and particle size of each component: 9.5% cryolite (Na 3 AlF 6 , ≤200 mesh), 1.5% iron sulfide (FeS 2 , ≤200 mesh), 3% iron red (Fe 2 o 3 , ≤180 mesh), 4% iron black (Fe 3 o 4 , ≤200 mesh), 12% barite (BaSO 4 , ≤240 mesh), 18% binder, 52% high titanium bauxite homogeneous material mixed powder (≤50 mesh).

[0025] The mass ratio of bauxite to titanium dioxide in the high-titanium bauxite homogeneous mixed powder is 4:1, of which coarse particles (80 mesh < particle size ≤ 50 mesh) account for 35wt.%, medium particles (200 mesh < particle size diameter ≤ 80 mesh) accounted for 45wt.%, fine particles (particle size ≤ 200 mesh) accounted for 20wt.%.

[0026] Preparation and molding follow the steps below:

[0027] Step 1, bauxite homogenization treatment: Bauxite (Al 2 o 3 content of 58~60wt.%) and t...

Embodiment 2

[0033] Example 2: Preparation of high wear-resistant ceramic automobile brake pads containing 55wt.% bauxite homogeneous material.

[0034] Mass percentage and particle size of each component: 9.4% cryolite (Na 3 AlF 6 , ≤200 mesh), 2% iron sulfide (FeS 2 , ≤200 mesh), 2.6% iron red (Fe 2 o 3 , ≤180 mesh), 4% iron black (Fe 3 o 4 , ≤200 mesh), 11% barite (BaSO 4 , ≤240 mesh), 16% binder, 55% high titanium bauxite homogeneous material mixed powder (≤50 mesh). The mass ratio of bauxite to titanium dioxide in the mixed powder of high-titanium bauxite homogeneous material is 4:1, coarse particles (80 mesh < particle size ≤ 50 mesh) account for 30wt.%, medium particles (200 mesh < particle size ≤80 mesh) accounted for 40wt.%, fine particles (particle size ≤200 mesh) accounted for 30wt.%.

[0035] Prepare and shape according to the following steps:

[0036] Step 1, bauxite homogenization treatment: Bauxite (Al 2 o 3 content of 58~60wt.%) and titanium dioxide mixed powde...

Embodiment 3

[0042] Example 3: Preparation of high wear-resistant ceramic automobile brake pads containing 58wt.% bauxite homogeneous material.

[0043] Mass percentage and particle size of each component: 7.5% cryolite (Na 3 AlF 6 , -200 mesh), 1.8% iron sulfide (FeS 2 , ≤200 mesh), 2.5% iron red (Fe 2 o 3 , ≤180 mesh), 3.2% iron black (Fe 3 o 4 , ≤200 mesh), 10% barite (BaSO 4 , ≤240 mesh), 17% binder, 58% high titanium bauxite homogeneous material mixed powder (≤50 mesh). The mass ratio of bauxite to titanium dioxide in the high-titanium bauxite homogeneous mixed powder is 5:1, coarse particles (80 mesh < particle size ≤ 50 mesh) account for 30wt.%, medium particles (200 mesh < particle size ≤80 mesh) accounted for 50wt.%, fine particles (particle size ≤200 mesh) accounted for 20wt.%.

[0044] Prepare and shape according to the following steps:

[0045] Step 1, bauxite homogenization treatment: the bauxite (Al 2 o 3 content of 58~60wt.%) and titanium dioxide are crushed to ...

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Abstract

The invention discloses a material of a high-wear-resistance ceramic automobile brake block, and preparation and molding methods of the material. The material of the high-wear-resistance ceramic automobile brake block comprises the following components in percentage by weight: 7-10% of cryolite, 1.5-2% of ferric sulfide, 1-3% of iron oxide red, 2.5-4% of iron oxide black, 9-12% of barite, 16-18% of binding agent, and the balance of high-titanium bauxite homogenized material composed of bauxite and titanium dioxide. According to the material disclosed by the invention, a multi-component friction modifying agent and a filler are added, the adding amount of each component is optimized and the grain diameter of powder is optimized, so as to adjust friction and abrasion behaviors; and a resin bonding agent is used for compounding a plurality of the functional components with a steel back to sufficiently express the synergistic effect of each component. The high-wear-resistance ceramic automobile brake block prepared by the material and the method disclosed by the invention is an environment-friendly friction material and has the advantages of low noise, high friction coefficient, small heat fading, long service life, small damages to mating plates and the like.

Description

technical field [0001] The invention relates to a material of a high wear-resistant ceramic automobile brake pad, and also relates to a preparation method of the material. Background technique [0002] Brake pads are the key parts of the automobile braking system, and the comprehensive performance of the brake pads is directly related to the stability and reliability of the braking system. Brake pad materials are mainly divided into three types according to different formulas: asbestos type, semi-metal type and non-asbestos organic compound type (NAO type). Asbestos-based brake pads will gradually lose crystal water at temperatures above 400°C, resulting in obvious "thermal recession", causing frictional instability, deterioration of working layer materials, increased wear rate and shortened service life. At the same time, asbestos-based brake pads do not meet environmental protection requirements, and the GB12676-1999 standard has banned the use of asbestos. Semi-metallic...

Claims

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Application Information

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IPC IPC(8): C09K3/14F16D69/02C08J5/14
Inventor 龚亚云李丹阳章林
Owner 龚亚云
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