CN111637179A - Stable and wear-resistant brake pad and preparation method and application thereof - Google Patents
Stable and wear-resistant brake pad and preparation method and application thereof Download PDFInfo
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- CN111637179A CN111637179A CN202010537075.9A CN202010537075A CN111637179A CN 111637179 A CN111637179 A CN 111637179A CN 202010537075 A CN202010537075 A CN 202010537075A CN 111637179 A CN111637179 A CN 111637179A
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- parts
- brake pad
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- 238000002360 preparation method Methods 0.000 title abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000000835 fiber Substances 0.000 claims abstract description 28
- 229910052802 copper Inorganic materials 0.000 claims abstract description 26
- 239000010949 copper Substances 0.000 claims abstract description 26
- 239000011230 binding agent Substances 0.000 claims abstract description 20
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 18
- 239000004696 Poly ether ether ketone Substances 0.000 claims abstract description 17
- 229920002530 polyetherether ketone Polymers 0.000 claims abstract description 17
- 239000010455 vermiculite Substances 0.000 claims abstract description 17
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 17
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 17
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 16
- 238000005245 sintering Methods 0.000 claims abstract description 16
- 238000000465 moulding Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract 3
- 239000000203 mixture Substances 0.000 claims description 21
- 238000005299 abrasion Methods 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 239000011265 semifinished product Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims description 2
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 5
- 238000010276 construction Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 claims 1
- 239000010425 asbestos Substances 0.000 abstract description 9
- 229910052895 riebeckite Inorganic materials 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 3
- 150000002148 esters Chemical class 0.000 abstract description 2
- 229920006389 polyphenyl polymer Polymers 0.000 abstract description 2
- 239000002783 friction material Substances 0.000 description 13
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/16—Condensation polymers of aldehydes or ketones with phenols only of ketones with phenols
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/149—Antislip compositions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/027—Compositions based on metals or inorganic oxides
- F16D69/028—Compositions based on metals or inorganic oxides containing fibres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0004—Materials; Production methods therefor metallic
- F16D2200/0026—Non-ferro
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0034—Materials; Production methods therefor non-metallic
- F16D2200/0056—Elastomers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0082—Production methods therefor
- F16D2200/0086—Moulding materials together by application of heat and pressure
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a stable and wear-resistant brake pad and a preparation method and application thereof. The composite material comprises the following raw materials in parts by mass: 40-50 parts of polyether ether ketone, 20-30 parts of copper fiber, 3-4 parts of a binder, 10-20 parts of aluminum hydroxide, 5-6 parts of styrene butadiene rubber, 2-3 parts of bronze powder and 3-5 parts of vermiculite. The preparation process comprises the following steps: the brake pad is obtained by mixing the raw materials, then carrying out hot press molding, and then sintering. Compared with asbestos brake pads, the brake pad has better durability, friction stability and wear resistance. The brake pad is prepared by taking the polyphenyl ester and the copper fiber as raw materials, overcomes the defects of brake pads prepared by the copper fiber, and improves the wear resistance and the high-temperature stability. Has better application prospect in various mechanical devices.
Description
Technical Field
The invention belongs to the technical field of brake pads, and particularly relates to a stable and wear-resistant brake pad and a preparation method and application thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
In mechanical equipment such as automobiles, trains, airplanes and various engineering machines, the friction performance of a brake pad is required to realize the transmission and braking of the vehicles or the machines. The brake pad is required to withstand repeated friction, so the wear resistance of the brake pad has a great influence on the usability of the brake pad.
Asbestos has the advantage of light weight as a brake pad material, but has poor heat conduction capability, and the fine asbestos fiber is blown up in the air and sucked into the lung, thereby having certain harm to human body. In the prior art, copper-containing fibers are used for replacing asbestos to be used as brake pad materials, and metal fibers are added into the brake pad to improve the performance of the brake pad. The copper fiber has high temperature resistance, but the brake pad prepared by the existing copper fiber has poor stability of brake performance at high temperature, namely, the fluctuation of the friction coefficient at high temperature is large, and in addition, the problem of poor wear resistance is also caused.
Disclosure of Invention
In view of the problems in the prior art, the present invention is to provide a stable and wear-resistant brake pad, and a preparation method and applications thereof.
In order to solve the technical problems, the technical scheme of the invention is as follows:
in a first aspect, a stable and wear-resistant brake pad comprises the following raw materials in parts by mass: 40-50 parts of polyether ether ketone, 20-30 parts of copper fiber, 3-4 parts of a binder, 10-20 parts of aluminum hydroxide, 5-6 parts of styrene butadiene rubber, 2-3 parts of bronze powder and 3-5 parts of vermiculite.
The invention provides a brake pad which replaces the prior brake pad which takes asbestos as a main material and has the advantages of good wear resistance, stable friction coefficient and low noise. The raw materials are selected for matching, so that the defect of the asbestos brake block is overcome, and the asbestos brake block has good wear resistance and stable high-temperature friction coefficient. The problem of current copper fibre brake block, coefficient of friction change is great under the high temperature, influences braking performance is solved, the poor problem of copper fibre brake block wearability has been solved.
During the braking process of the brake pad, the temperature can rise, the friction performance can be reduced, and the braking is unstable. The polyether-ether-ketone adopted by the application has the performances of high temperature resistance, solvent resistance, aging resistance, hydrolysis resistance, extremely high specific strength, specific modulus and the like, and particularly can still keep good comprehensive performance in a severe environment of high temperature and high humidity. The prepared friction material is high temperature resistant, and the stability of the brake pad is improved.
The copper fiber has the functions of increasing the connection strength and heat conduction of the friction material, rapidly dissipating heat generated by the friction surface, reducing the temperature and ensuring the stability of the braking capacity. The copper fiber mainly replaces asbestos in the brake block, has good heat-conducting property and can overcome the defects of the asbestos brake block. In the invention, the copper fiber and the aluminum hydroxide are matched with each other to improve the high-temperature resistance of the brake pad.
The styrene butadiene rubber has the function of improving the integral strength and the wear resistance. Bronze powder is helpful for reducing industrial abrasion and noise; the vermiculite can help to increase the overall strength of the brake pad. The styrene butadiene rubber and the bronze powder are matched with the polyether-ether-ketone, so that the wear resistance of the brake pad is improved.
In some embodiments of the present invention, the composition comprises the following raw materials in parts by mass: 40-45 parts of polyether ether ketone, 20-25 parts of copper fiber, 3-3.5 parts of a binder, 10-15 parts of aluminum hydroxide, 5-5.5 parts of styrene butadiene rubber, 2-2.5 parts of bronze powder and 3-4 parts of vermiculite.
In some embodiments of the present invention, the composition comprises the following raw materials in parts by mass: 45-50 parts of polyether ether ketone, 25-30 parts of copper fiber, 3.5-4 parts of a binder, 15-20 parts of aluminum hydroxide, 5.5-6 parts of styrene butadiene rubber, 2.5-3 parts of bronze powder and 4-5 parts of vermiculite.
In some embodiments of the invention, the binder is at least one of hydroxymethylcellulose, polyvinyl alcohol.
In a second aspect, the preparation method of the stable and wear-resistant brake pad specifically comprises the following steps:
mixing polyether-ether-ketone, copper fiber, a binder, aluminum hydroxide, styrene butadiene rubber, bronze powder and vermiculite;
putting the mixture into a mould for hot press molding;
and sintering the semi-finished product of the mixture subjected to hot press molding to obtain the brake pad.
In some embodiments of the invention, the mixing and stirring time of each raw material is 2-4 hours; preferably 2-3 hours.
In some embodiments of the invention, the pressure of hot press molding is 200-230 MPa, and the temperature of hot press molding is 150-170 ℃; preferably, the pressure of the hot-press molding is 200-210MPa, and the temperature of the hot-press molding is 150-160 ℃. The reaction temperature is favorable for the raw materials to be solidified.
In some embodiments of the invention, the hot press forming time is 1.5 to 2.5 hours.
In some embodiments of the invention, the sintering temperature is 170-200 ℃, and the sintering time is 0.5-2 hours; preferably 170 ℃ and 180 ℃.
In a third aspect, the stable and wear-resistant brake pad is applied to transportation machinery or engineering machinery; preferably in mechanical equipment such as automobiles, trains, airplanes, oil rigs and the like.
The invention has the beneficial effects that:
compared with the prior art, the friction material is made by taking the polyphenyl ester and the copper fiber as raw materials, so that the friction material is high temperature resistant, the friction stability, the product appearance and the heat distribution are improved, the styrene butadiene rubber is adopted to improve the strength and the wear resistance, the bronze powder is beneficial to reducing the industrial abrasion and the noise, and the vermiculite is beneficial to increasing the integral strength of the brake pad.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise. The invention will be further illustrated by the following examples
Example 1
The friction material composition for the automobile brake pad comprises 40 parts of polyether-ether-ketone, 20 parts of copper fiber, 3 parts of a binder, 10 parts of aluminum hydroxide, 5 parts of styrene butadiene rubber, 2 parts of bronze powder and 3 parts of vermiculite, wherein the binder is polyvinyl alcohol.
A preparation method of a friction material composition of an automobile brake pad comprises the following steps:
(1) mixing 40 parts of polyether-ether-ketone, 20 parts of copper fiber, 3 parts of binder, 10 parts of aluminum hydroxide, 5 parts of styrene butadiene rubber, 2 parts of bronze powder and 3 parts of vermiculite for 2 hours;
(2) pouring the mixture processed in the step (1) into a mould, and then carrying out hot press molding for 2 hours under the pressure of 200MPa, wherein the hot press temperature is 150 ℃;
(3) and (3) sintering the mixture semi-finished product formed by hot pressing in the step (2) in a high-temperature sintering furnace at the sintering temperature of 170 ℃ for 1 hour.
The friction material composition of the automobile brake pad prepared in the embodiment has a wear resistance coefficient of 0.38.
The results of the friction coefficient test of the brake pad of example 1 are shown in table 1, and the temperatures tested in table 1 were continuous.
TABLE 1 Friction coefficient test results
From table 1, it can be seen that the brake pad of example 1 has a characteristic of stable high-temperature friction coefficient, and can maintain braking performance at high temperature.
Example 2
The friction material composition of the automobile brake pad comprises 45 parts of polyether-ether-ketone, 25 parts of copper fiber, 3.5 parts of a binder, 15 parts of aluminum hydroxide, 5.5 parts of styrene-butadiene rubber, 2.5 parts of bronze powder and 4 parts of vermiculite, wherein the binder is polyvinyl alcohol.
A preparation method of a friction material composition of an automobile brake pad comprises the following steps:
(1) mixing 45 parts of polyether-ether-ketone, 25 parts of copper fiber, 3.5 parts of binder, 15 parts of aluminum hydroxide, 5.5 parts of styrene-butadiene rubber, 2.5 parts of bronze powder and 4 parts of vermiculite for 2 hours;
(2) pouring the mixture processed in the step (1) into a mould, and then carrying out hot press molding for 2.5 hours under the pressure of 200MPa, wherein the hot press temperature is 150 ℃;
(3) and (3) sintering the mixture semi-finished product formed by hot pressing in the step (2) in a high-temperature sintering furnace at the sintering temperature of 170 ℃ for 1 hour.
The wear-resistant coefficient of the friction material composition of the automobile brake pad prepared in the embodiment is 0.42.
Example 3
The friction material composition for the automobile brake pad comprises 50 parts of polyether-ether-ketone, 30 parts of copper fiber, 4 parts of a binder, 20 parts of aluminum hydroxide, 6 parts of styrene butadiene rubber, 3 parts of bronze powder and 5 parts of vermiculite, wherein the binder is polyvinyl alcohol.
A preparation method of a friction material composition of an automobile brake pad comprises the following steps:
(1) mixing 50 parts of polyether-ether-ketone, 30 parts of copper fiber, 4 parts of binder, 20 parts of aluminum hydroxide, 6 parts of styrene butadiene rubber, 3 parts of bronze powder and 5 parts of vermiculite for 3 hours;
(2) pouring the mixture processed in the step (1) into a mould, and then carrying out hot press molding for 2 hours under the pressure of 210MPa, wherein the hot press temperature is 150 ℃;
(3) and (3) sintering the mixture semi-finished product formed by hot pressing in the step (2) in a high-temperature sintering furnace at the sintering temperature of 180 ℃ for 1 hour.
The wear resistance coefficient of the friction material composition of the automobile brake pad prepared in the embodiment is 0.37.
Comparative example 1
In contrast to example 1, no bronze powder was added.
The obtained brake pad is subjected to a wear resistance test, and the wear resistance coefficient is 0.3. The wear resistance coefficient is reduced and the wear resistance is reduced after bronze powder is not added.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a stable and wear-resisting brake block which characterized in that: the method comprises the following specific steps: the composite material comprises the following raw materials in parts by mass: 40-50 parts of polyether ether ketone, 20-30 parts of copper fiber, 3-4 parts of a binder, 10-20 parts of aluminum hydroxide, 5-6 parts of styrene butadiene rubber, 2-3 parts of bronze powder and 3-5 parts of vermiculite.
2. The stable, wear-resistant brake pad of claim 1, wherein: the composite material comprises the following raw materials in parts by mass: 40-45 parts of polyether ether ketone, 20-25 parts of copper fiber, 3-3.5 parts of a binder, 10-15 parts of aluminum hydroxide, 5-5.5 parts of styrene butadiene rubber, 2-2.5 parts of bronze powder and 3-4 parts of vermiculite;
or, the raw materials with the following parts by mass are included: 45-50 parts of polyether ether ketone, 25-30 parts of copper fiber, 3.5-4 parts of a binder, 15-20 parts of aluminum hydroxide, 5.5-6 parts of styrene butadiene rubber, 2.5-3 parts of bronze powder and 4-5 parts of vermiculite.
3. The stable, wear-resistant brake pad of claim 1, wherein: the binder is at least one of hydroxymethyl cellulose and polyvinyl alcohol.
4. A method of making a stable and wear resistant brake pad as claimed in any one of claims 1 to 3, wherein: the method comprises the following specific steps:
mixing polyether-ether-ketone, copper fiber, a binder, aluminum hydroxide, styrene butadiene rubber, bronze powder and vermiculite;
putting the mixture into a mould for hot press molding;
and sintering the semi-finished product of the mixture subjected to hot press molding to obtain the brake pad.
5. The method of making a stable and abrasion resistant brake pad of claim 4, wherein: the mixing and stirring time of the raw materials is 2-4 hours.
6. The method of making a stable and abrasion resistant brake pad of claim 4, wherein: the pressure of hot-press molding is 200-230 MPa, and the hot-press temperature is 150-170 ℃.
7. The method of making a stable and abrasion resistant brake pad of claim 4, wherein: the time of hot press molding is 1.5-2.5 h.
8. The method of making a stable and abrasion resistant brake pad of claim 4, wherein: the sintering temperature is 170-200 ℃, and the sintering time is 0.5-2 hours.
9. Use of a stable and wear resistant brake pad according to any of claims 1-2 in transport or construction machinery.
10. The use of claim 9, wherein: the method is applied to mechanical equipment such as automobiles, trains, airplanes, oil drilling rigs and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010537075.9A CN111637179A (en) | 2020-06-12 | 2020-06-12 | Stable and wear-resistant brake pad and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010537075.9A CN111637179A (en) | 2020-06-12 | 2020-06-12 | Stable and wear-resistant brake pad and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111637179A true CN111637179A (en) | 2020-09-08 |
Family
ID=72330255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010537075.9A Withdrawn CN111637179A (en) | 2020-06-12 | 2020-06-12 | Stable and wear-resistant brake pad and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111637179A (en) |
-
2020
- 2020-06-12 CN CN202010537075.9A patent/CN111637179A/en not_active Withdrawn
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Application publication date: 20200908 |
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