Powder metallurgy brake pad and preparing method thereof

A technology of powder metallurgy and brake pads, which is applied in the field of powder metallurgy brake pads and its preparation, can solve problems such as the failure to meet the requirements of wading recovery performance, high-temperature thermal degradation of brake pads, and insufficient static parking torque on slopes, etc., to achieve superior performance, Accelerate wear and improve the effect of high temperature heat decay

Inactive Publication Date: 2019-01-11
BEIJING TIANRENDAOHE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is to overcome the significant problems of the existing technology, such as high-temperature thermal recession, wading recovery performance that cannot meet the requirements, and insufficient parking static torque on slopes.

Method used

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  • Powder metallurgy brake pad and preparing method thereof
  • Powder metallurgy brake pad and preparing method thereof
  • Powder metallurgy brake pad and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Friction material composition: see Table 1.

[0030] The raw material particle size of the friction material is: iron powder-200 mesh, copper powder-200 mesh, molybdenum trioxide-325 mesh, graphite-40 mesh, silicon oxide-325 mesh, aluminum oxide-325 mesh, nickel powder-400 mesh.

[0031] Preparation:

[0032] (1) Carry out degreasing and copper-plating pretreatment on the steel back connected with the friction material of the brake pad, and wait for use after the treatment is completed;

[0033] (2) Put the weighed raw materials into the mixer, the rotating speed of the mixer is 25r / min, and the mixing time is 60 minutes.

[0034] (3) Add the mixed powder into the mold cavity and press it, the pressing pressure is 300MPa, and the holding time is 20s;

[0035] (4) Put the pressed green compact and the pretreated steel back into a sintering furnace for sintering, the sintering temperature is 1050° C., and the holding time is 120 minutes.

[0036] (5) After the steel ba...

Embodiment 2

[0041] Friction material composition: see Table 1.

[0042] The raw material particle size of the friction material is: iron powder-200 mesh, copper powder-200 mesh, molybdenum trioxide-325 mesh, graphite-40 mesh, silicon oxide-325 mesh, aluminum oxide-325 mesh, nickel powder-400 mesh.

[0043] Preparation:

[0044] (1) Carry out degreasing and copper-plating pretreatment on the steel back connected with the friction material of the brake pad, and wait for use after the treatment is completed;

[0045] (2) Put the weighed raw materials into the mixer, the rotating speed of the mixer is 25r / min, and the mixing time is 70 minutes.

[0046] (3) Add the mixed powder into the mold cavity and press it with a pressing pressure of 250MPa and a holding time of 15s;

[0047] (4) Put the pressed compact and the pretreated steel back into a sintering furnace for sintering, the sintering temperature is 1000° C., and the holding time is 90 minutes.

[0048] (5) After the steel back and t...

Embodiment 3

[0053] Friction material composition: see Table 1.

[0054] The raw material particle size of the friction material is: iron powder-200 mesh, copper powder-200 mesh, molybdenum trioxide-325 mesh, graphite-40 mesh, silicon oxide-325 mesh, aluminum oxide-325 mesh, nickel powder-400 mesh.

[0055] Preparation:

[0056] (1) Carry out degreasing and copper-plating pretreatment on the steel back connected with the friction material of the brake pad, and wait for use after the treatment is completed;

[0057] (2) Put the weighed raw materials into the mixer, the rotating speed of the mixer is 25r / min, and the mixing time is 70 minutes.

[0058] (3) Add the mixed powder into the mold cavity and press it, the pressing pressure is 200MPa, and the holding time is 30s;

[0059] (4) Put the pressed green compact and the pretreated steel back into a sintering furnace for sintering, the sintering temperature is 1050° C., and the holding time is 60 minutes.

[0060] (5) After the steel bac...

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Abstract

The invention belongs to the technical field of automobile braking systems, and particularly relates to a powder metallurgy brake pad and a preparing method thereof. The powder metallurgy brake pad isprepared through the technologies of mixing, pressing and sintering. The powder metallurgy brake pad comprises friction materials and steel backing. The friction materials comprise following raw materials including, by weight, 10-50 parts of iron powder, 10-50 parts of copper powder, 1-6 parts of molybdenum trioxide, 6-20 parts of graphite, 0.5-3 parts of silicon oxide, 0.5-3 parts of aluminum oxide and 1-5 parts of nickel powder. The obvious problems that in the prior art, high-temperature heat fading exists in a brake pad, the wading recovery performance cannot meet the requirement, and theslope parking static moment is insufficient are solved. The brake pad in which components are simple, obvious heat fading is avoided, the wading recovery performance is good, the slope parking staticmoment is high is provided, and the brake pad is matched with a cast iron brake disc.

Description

technical field [0001] The invention belongs to the technical field of automobile brake systems, and in particular relates to a powder metallurgy brake pad and a preparation method thereof. Background technique [0002] Automobile brakes are the main components of automobile braking systems. Brakes mainly include disc brakes and drum brakes. Now the braking system of commercial vehicles, especially the braking system of the rear axle, mostly uses drum brakes, and drum brakes are the largest The disadvantage is that the continuous braking during the long downhill process will easily cause the brake drum to overheat, and cold water will be used to cool it down. Under repeated alternating cold and heat, the brake drum will burst, resulting in brake failure and accidents. Compared with drum brakes, disc brakes have the characteristics of stable braking torque, good heat dissipation, and light weight. It is precisely because of this that the national standard stipulates that dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02C09K3/14
Inventor 吴佩芳释加才让王灿党一纵范叶明崔新亮解小花
Owner BEIJING TIANRENDAOHE NEW MATERIAL CO LTD
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