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A kind of brake pad with high friction coefficient and preparation method thereof

A technology of high friction coefficient and brake pads, which is applied in the direction of friction linings, chemical instruments and methods, mechanical equipment, etc., can solve the problems of large wear and attenuation of friction coefficient, and achieve low wear and small fluctuation of friction coefficient , the effect of small wear

Active Publication Date: 2018-05-11
BEIJING TIANYISHANGJIA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the problems of obvious attenuation of friction coefficient and large amount of wear existing in the existing copper-based powder metallurgy brake pads when they are used for high-speed train braking, and to provide a stable friction performance and wear-resistant brake pad. Damaged brake pad with high friction coefficient and preparation method thereof

Method used

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  • A kind of brake pad with high friction coefficient and preparation method thereof
  • A kind of brake pad with high friction coefficient and preparation method thereof
  • A kind of brake pad with high friction coefficient and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The brake pad with high friction coefficient described in this embodiment includes the following raw material components:

[0040] Electrolytic copper powder, 52 parts by weight;

[0041] Particle size is 200 mesh eutectoid steel grinding powder, 12 parts by weight;

[0042] Copper-coated graphite powder, 7 parts by weight;

[0043] Ferrous sulfide, 5 parts by weight;

[0044] Electrolytic nickel powder, 6 parts by weight;

[0045] Silicon dioxide, 4 parts by weight;

[0046] Molybdenum oxide, 8 parts by weight.

[0047] The brake pad described in this embodiment is prepared by the following method:

[0048] (1) Weighing each raw material component according to the above parts by weight and placing it in a ball mill for thorough mixing for 4 hours to obtain a mixture;

[0049] (2) Fill the mixture in the step (1) into the mould, hold the pressure for 20s under the pressure of 15MPa to obtain the green body by pressing;

[0050] (3) Use a hot press to directly hea...

Embodiment 2

[0052] The brake pad with high friction coefficient described in this embodiment includes the following raw material components:

[0053] Reduced copper powder, 62 parts by weight;

[0054] Particle size is 300 mesh eutectoid steel grinding powder, 8 parts by weight;

[0055] Copper-coated graphite powder, 13 parts by weight;

[0056] Ferrous sulfide, 2 parts by weight;

[0057] Electrolytic nickel powder, 8 parts by weight;

[0058] Silicon dioxide, 6 parts by weight;

[0059] Molybdenum oxide, 6 parts by weight.

[0060] The brake pad described in this embodiment is prepared by the following method:

[0061] (1) Weighing each raw material component according to the above parts by weight and placing it in a ball mill for thorough mixing for 4 hours to obtain a mixture;

[0062](2) Fill the mixture in the step (1) into the mould, hold the pressure for 15s under the pressure of 20MPa to obtain the green body by pressing;

[0063] (3) Use a hot press to directly heat the ...

Embodiment 3

[0065] The brake pad with high friction coefficient described in this embodiment includes the following raw material components:

[0066] Water atomized copper powder, 57 parts by weight;

[0067] Particle size is 250 mesh eutectoid steel grinding powder, 11 parts by weight;

[0068] Copper-coated graphite powder, 15 parts by weight;

[0069] Ferrous sulfide, 6 parts by weight;

[0070] Reduced nickel powder, 3 parts by weight;

[0071] Silicon dioxide, 5 parts by weight;

[0072] Molybdenum oxide, 12 parts by weight.

[0073] The brake pad described in this embodiment is prepared by the following method:

[0074] (1) Weighing each raw material component according to the above parts by weight and placing it in a ball mill for thorough mixing for 4 hours to obtain a mixture;

[0075] (2) Fill the mixture in the step (1) into the mould, hold the pressure for 10s under the pressure of 25MPa to obtain the green body by pressing;

[0076] (3) Use a hot press to directly heat...

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Abstract

The invention provides a brake pad with high friction coefficients and a preparation method of the brake pad. A raw material formula of the brake pad comprises components as follows: a copper source, eutectoid steel ground powder, copper-coated graphite powder, ferrous sulfide, a nickel source, silicon dioxide and molybdenum oxide; the components of raw materials are sufficiently mixed, pressed and formed, a blank body is subjected to hot pressed sintering and constant-temperature cooling, and the brake pad is prepared. Through adoption of the reasonable proportion of the raw materials, strict control of heating temperature and proper constant-temperature cooling treatment, the density of the produced material can be substantially improved, the texture and the structure of the materials are more stable, and the brake pad can adapt to the high-temperature condition produced during braking of a high-speed train and also always has stable high friction coefficient and low wear in the use process. The brake pad prepared with the method has the advantages of high friction coefficients, little wear, stable friction performance, long service life and the like under the high-speed braking condition.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a brake pad with a high friction coefficient and a preparation method thereof. Background technique [0002] Friction material is one of the indispensable materials for the production of brakes, clutches and friction transmissions of various mechanical equipment. It uses friction to convert the kinetic energy of a moving object into heat and dissipates it into the air, thereby slowing down or stopping the object. Since the advent of vehicles, the research on friction materials has been started, especially in the past 20 years, with the vigorous development of the transportation industry, the research and development of friction materials has become more and more in-depth, and many new friction materials have emerged, such as cast iron, bronze, etc. , polymer synthetic materials, powder metallurgy materials, carbon / carbon composite materials, etc. Among them, polymer syn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/14C22C9/00C22C30/02C22C32/00C22C1/05F16D69/02C09K3/14
CPCB22F1/0003B22F3/14B22F2003/145B22F2998/10C09K3/14C22C1/05C22C9/00C22C30/02C22C32/00C22C32/0084C22C32/0089F16D69/027F16D2200/0026F16D2200/0082F16D2250/0023B22F3/02
Inventor 吴佩芳曹静武
Owner BEIJING TIANYISHANGJIA NEW MATERIAL
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