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Friction-resistant brake disc and preparation method thereof

A brake disc, friction-resistant technology, applied in the direction of brake disc, brake type, brake components, etc., can solve the problems of brake pad wear, long continuous braking time, large coating roughness, etc., to achieve extended life, The effect of reducing brake wear and increasing braking efficiency

Active Publication Date: 2021-07-20
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wear-resistant coating usually contains tungsten carbide or chromium carbide metal particles, which have high hardness. The roughness of the coating in the original sprayed state is relatively large, which will cause greater wear to the brake pads, and the continuous braking time of the intervention is longer, that is, it needs More braking times can reach a stable braking state

Method used

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  • Friction-resistant brake disc and preparation method thereof
  • Friction-resistant brake disc and preparation method thereof
  • Friction-resistant brake disc and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] As a kind of anti-friction brake disc according to the embodiment of the present invention, the anti-friction brake disc includes a brake disc substrate and a coating on the surface of the brake disc substrate; the material of the coating is chromium carbide-nickel-chromium cermet , the chromium carbide-nickel-chromium cermet is Cr 3 C 2 -25NiCr; the surface roughness of the coating is 1.0 μm, the material of the brake disc base is 30CrSiMoVA, and the thickness of the coating is 300 μm.

[0033] The preparation method of the friction-resistant brake disc of this embodiment comprises the following steps:

[0034] (1) Cast the brake disc base body, degrease and clean the two friction surfaces of the brake disc base body, use 24# zirconium corundum sand to roughen the surface of the friction surface under a pressure of 0.3MPa;

[0035] (2) forming a coating by supersonic thermal spraying in powder form on the surface of the brake disc substrate treated in step (1);

[0...

Embodiment 2

[0038] As a friction-resistant brake disc according to an embodiment of the present invention, the only difference between this embodiment and Embodiment 1 is that the surface roughness of the coating is 1.2 μm.

[0039] The only difference between the preparation method of the anti-friction brake disc of this embodiment and that of Embodiment 1 is that step (4) is also included, and the coating surface treated in step (3) is subjected to sandblasting treatment, the sandblasting particles are aluminum oxide, and the The sand pressure was 0.15 MPa, so that the surface roughness of the coating was 1.2 μm.

Embodiment 3

[0041] As a friction-resistant brake disc according to an embodiment of the present invention, the only difference between this embodiment and Embodiment 2 is that the surface roughness of the coating is 1.5 μm.

[0042] The only difference between the preparation method of the anti-friction brake disc of this embodiment and that of Example 2 is that step (4) is also included, and the coating surface treated in step (3) is subjected to sandblasting treatment, the sandblasting particles are alumina, and The sand pressure is 0.15MPa-0.35MPa, so that the surface roughness of the coating is 1.5μm.

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Abstract

The invention provides a friction-resistant brake disc and a preparation method thereof. The friction-resistant brake disc comprises a brake disc base body and a coating on the surface of the brake disc base body, wherein the coating is made of chromium carbide-nickel chromium metal ceramic, and the weight percentage of chromium carbide in the chromium carbide-nickel chromium metal ceramic is 70%-80%; and the surface roughness of the coating ranges from 1.0 micrometer to 3.0 micrometers. According to the friction-resistant brake disc, the chromium carbide-nickel chromium metal ceramic material is used for forming the surface coating to provide friction braking, compared with a steel disc, the braking efficiency is higher, compared with a surface coating in a spraying state, the intervention continuous braking time can be shortened, and meanwhile, the braking stability is improved favorably, brake abrasion in the braking process can be reduced, brake lining replacement cost is reduced, the service life of the friction-resistant brake disc is prolonged, and in addition, heat in the braking process can be prevented from being transmitted to the brake disc base body through the coating on the surface of the brake disc base body, and thermal fatigue failure of the brake disc is avoided.

Description

technical field [0001] The invention relates to the field of motor vehicle brake equipment, in particular to a friction-resistant brake disc and a preparation method thereof. Background technique [0002] The brake disc is an important component in the disc brake system, which can slow down or stop the vehicle through friction with the brake pads. Traditional high-speed rail brake discs usually use gray cast iron and steel materials. With the increase of train speed and harsh working conditions, brake discs have various forms of failure, such as hot spots, thermal cracks, wear, etc., which affect the The exercise of the train is safe. Therefore, it is extremely important to improve the performance of the brake disc. [0003] Chinese patent document CN 211288535 U discloses a lightweight brake disc. By coating the friction surface with a coating with higher wear resistance than the substrate, the cracks caused by thermal fatigue of the brake disc after repeated high-speed b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D65/12C22C29/06C23C4/06C23C4/12C23C4/18
CPCF16D65/12F16D65/127C23C4/12C23C4/06C22C29/067C23C4/18
Inventor 牛少鹏温玉颖张小锋邓春明宋进兵杨焜王超黄益聪曾威戴红亮黄科
Owner GUANGDONG INST OF NEW MATERIALS
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