CN109114143B - Magnesium-ceramic-based brake friction plate and preparation method thereof - Google Patents
Magnesium-ceramic-based brake friction plate and preparation method thereof Download PDFInfo
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- CN109114143B CN109114143B CN201811241310.7A CN201811241310A CN109114143B CN 109114143 B CN109114143 B CN 109114143B CN 201811241310 A CN201811241310 A CN 201811241310A CN 109114143 B CN109114143 B CN 109114143B
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- 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—Compositions of linings; Methods of manufacturing
- F16D69/023—Composite materials containing carbon and carbon fibres or fibres made of carbonizable material
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- 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
-
- 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—Compositions of linings; Methods of manufacturing
- F16D69/025—Compositions based on an organic binder
- F16D69/026—Compositions based on an organic binder containing fibres
-
- 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
- F16D2069/002—Combination of different friction materials
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- 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
- F16D2200/0039—Ceramics
-
- 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
- F16D2200/0052—Carbon
-
- 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
Abstract
The invention belongs to the technical field of brake pads, and particularly relates to a magnesium-ceramic-based brake friction plate and a preparation method thereof. Comprises the following raw materials in parts by weight: 8-15% of phenolic resin, 10-20% of potassium magnesium titanate platelet, 5-15% of elastic graphite, 5-10% of ceramic fiber, 10-25% of silane-treated mineral fiber, 3-8% of molybdenum sulfide, 3-6% of calcium silicate hydrate, 1-4% of aramid fiber and 30-50% of filler. The magnesium ceramic-based brake friction plate prepared from the mixed ingredients has the characteristics of uniform texture, small noise, low density, light weight, outstanding high-temperature brake effect and wear resistance.
Description
Technical Field
The invention belongs to the technical field of brake pads, and particularly relates to a mixed ingredient for manufacturing a magnesium ceramic-based brake pad and a method for preparing the magnesium ceramic-based brake pad by using the mixed ingredient.
Background
The automobile brake pad is an important safety part in the automobile running process, with the continuous progress of the automobile industry technology, the brake friction plate not only reaches the mandatory standard on the safety performance, but also puts forward higher requirements on the aspects of braking comfort and wear resistance, and the application, formula ratio and production process of the friction material of the brake pad determine the performance level of the brake pad. The friction material of the brake pad is mostly made of macromolecule ternary composite material at present, by macromolecule agglomerant (resin and rubber), three major groups of reinforcing fiber and frictional property regulator and other compounding chemicals make up, the products made by a series of production and processing, the inside component dispersibility of this kind of brake pad is poor, the density is high (above 2.0g/cm 3), the weight is heavy, the damping effect is not outstanding and the braking noise is big; secondly, the brake pad has obviously reduced braking performance at high temperature, has serious friction material loss and is not suitable for braking for a long time on a mountain road; thirdly, the brake pad contains more metal and heavy metal components, and is easy to generate rust adhesion phenomenon after long-term parking in a humid environment, and wheels can be rusted, adhered and locked.
Disclosure of Invention
The invention aims to provide a mixing ingredient for manufacturing a magnesium ceramic-based brake friction plate and a method for preparing the magnesium ceramic-based brake friction plate by using the mixing ingredient.
In order to realize the purpose, the invention firstly provides a magnesium-ceramic-based brake friction plate, which adopts the technical scheme that:
the magnesium ceramic-based brake friction plate is characterized by comprising the following raw materials in parts by weight: 8-15% of phenolic resin, 10-20% of potassium magnesium titanate platelet, 5-15% of elastic graphite, 5-10% of ceramic fiber, 10-25% of silane-treated mineral fiber, 3-8% of molybdenum sulfide, 3-6% of calcium silicate hydrate, 1-4% of aramid fiber and 30-50% of filler.
The additional technical characteristics of the magnesium ceramic-based brake friction plate further comprise that:
-the phenolic resin is a nitrile modified resin;
-the carbon content in the resilient graphite is greater than 99.5%; the magnesium content in the potassium magnesium titanate platelet is not lower than 25%; the content of Al2O3 in the ceramic fiber is between 30 and 40 percent; the content of MoS2 in the molybdenum sulfide is not less than 40%;
the invention also provides a method for preparing the magnesium ceramic-based brake friction plate by using the mixed ingredients, which comprises the following steps:
firstly, placing the aramid fiber in a plow-rake type mixer for pre-loosening for 5-10 minutes;
pouring phenolic resin, potassium magnesium titanate platelets, elastic graphite, ceramic fiber, silane treated mineral fiber, molybdenum sulfide, calcium silicate hydrate and filler into the plow-rake type mixer to mix for 10-15 minutes to form a finished product of mixed ingredients;
thirdly, putting the finished product of the mixed ingredients into a hot vulcanizing machine for vulcanizing for 5-10 minutes, wherein the vulcanizing temperature of a mold of the hot vulcanizing machine is set to be 145-155 ℃;
and step four, placing the vulcanized product obtained in the step three in a high-temperature curing furnace, curing for 2 hours at the set temperature within the range of 160 +/-2 ℃, and curing for 2 hours at the set temperature within the range of 180 +/-2 ℃.
Compared with the prior art, the magnesium ceramic-based brake friction plate and the preparation method thereof provided by the invention have the following advantages: firstly, the butyronitrile modified phenolic resin is used as a bonding agent, ceramic fibers are combined to be mixed with magnesium-based potassium titanate to be reinforced with poly phenylene terephthalamide (aramid) fibers, and the slag ball-free mineral fibers treated by silane are used for assisting in reinforcement, so that the product has better dispersibility and simultaneously has the characteristics of light weight and low density, the density of the product is reduced to be below 2.0g/cm3 (the minimum density of density above 2.0g/cm3 recognized in the industry is broken through), the damping function of the product is changed, and the occurrence probability of noise is reduced; secondly, the elastic graphite is combined with the molybdenum sulfide instead of the traditional crystalline flake graphite, so that the normal-temperature friction performance of the product is stabilized, the high-temperature friction performance of the product is improved, and the defect of large high-temperature abrasion of the traditional brake pad is reduced; the friction coefficient of more than 0.35 can still be kept at the high temperature of more than 600 ℃, the driving safety is ensured, the high-temperature abrasion of the product is reduced, and the brake pad can be used for more than 5 kilometres in mountainous areas and plains; and thirdly, compared with the application of metal and heavy metal components in the traditional brake pad, the brake pad produced by the preparation method has no metal content, solves the rust adhesion phenomenon of the product, and does not cause wheel rust adhesion locking after long-time parking.
Detailed Description
The working principle of the method for preparing the magnesium ceramic-based brake friction plate provided by the invention is further explained in detail with reference to the attached drawings.
The preparation method is characterized in that the mixed ingredients for preparing the magnesium ceramic-based brake friction plate are obtained and comprise the following raw materials in parts by weight: 8-15% of phenolic resin, 10-20% of potassium magnesium titanate platelet, 5-15% of elastic graphite, 5-10% of ceramic fiber, 10-25% of silane-treated mineral fiber, 3-8% of molybdenum sulfide, 3-6% of calcium silicate hydrate, 1-4% of aramid fiber and 30-50% of filler.
In the above-mentioned composition of the compounded ingredient for preparing the magnesia ceramic-based brake friction pad,
in order to enhance the toughness of the phenolic resin, the phenolic resin is a butyronitrile modified resin, so that the impact strength of the product is improved and the service life of the product is prolonged on the premise of ensuring higher heat resistance, and in an experiment, when the dosage of the nitrile rubber is only 2%, the impact strength of the phenolic resin can be improved by 100%, and when the dosage of the nitrile rubber is further increased, the impact strength is further increased;
preferably, the carbon content in the elastic graphite is more than 99.5%, the elastic graphite is adopted to replace the traditional crystalline flake graphite, the compression rate and the recovery rate are increased, and the characteristics of common carbon materials such as high temperature resistance, corrosion resistance and low density are also provided, and the characteristics are more prominent particularly when the elastic graphite is used at high temperature; the magnesium content in the potassium magnesium titanate platelet is not lower than 25%; the Al2O3 content in the ceramic fiber is between 30 and 40 percent; the content of MoS2 in molybdenum sulfide is not less than 40%, the prepared product prepared by the ingredients according to the weight ratio has good dispersibility and light weight and low density, the density of the product reaches below 2.0g/cm3 (the lowest density of density above 2.0g/cm3 accepted in the industry is broken through), the damping function of the product is changed, and the occurrence probability of noise is reduced.
After the mixed ingredients are obtained, the preparation process of the magnesium ceramic-based brake friction plate is carried out,
firstly, placing the aramid fiber in a plow-rake type mixer for pre-loosening for 5-10 minutes;
pouring phenolic resin, potassium magnesium titanate platelets, elastic graphite, ceramic fiber, silane treated mineral fiber, molybdenum sulfide, calcium silicate hydrate and filler into a plow-rake type mixer to mix for 10-15 minutes to form a finished product of mixed ingredients;
thirdly, putting the finished product of the mixed ingredients into a hot vulcanizing machine for vulcanizing for 5-10 minutes, wherein the vulcanizing temperature of a mold of the hot vulcanizing machine is set to be 145-155 ℃;
and step four, placing the vulcanized product obtained in the step three in a high-temperature curing furnace, curing for 2 hours at the set temperature within the range of 160 +/-2 ℃, and curing for 2 hours at the set temperature within the range of 180 +/-2 ℃.
Six embodiments are listed in detail below for the above preparation method and specific gravity and frictional properties are measured according to the standards. The test standards were respectively for specific gravity, and performance was measured using SAE J2522 standard.
In the case of the example 1, the following examples are given,
firstly, placing 1% aramid fiber in a plow-rake type mixer for pre-loosening for 5 minutes;
step two, pouring 10% of phenolic resin, 18% of potassium magnesium titanate platelets, 9% of elastic graphite, 6% of ceramic fiber, 14% of silane-treated mineral fiber, 5% of molybdenum sulfide, 4% of calcium silicate hydrate and 34% of filler into a plow-rake type mixer to mix for 12 minutes to form a finished product of mixed ingredients;
thirdly, putting the finished product of the mixed ingredients into a hot vulcanizing machine for vulcanizing for 9 minutes, wherein the vulcanizing temperature of a mold of the hot vulcanizing machine is set at 140 ℃;
and step four, placing the vulcanized product obtained in the step three in a high-temperature curing furnace, curing for 2 hours at the set temperature within the range of 160 +/-2 ℃, and curing for 2 hours at the set temperature within the range of 180 +/-2 ℃.
And (3) testing results: the specific gravity is 1.92g/cm 3. Coefficient of high temperature friction: 0.37. average coefficient of friction: 0.40
In the case of the example 2, the following examples are given,
firstly, placing 2% aramid fiber in a plow-rake type mixer for pre-loosening for 7 minutes;
step two, pouring 9% of phenolic resin, 20% of potassium magnesium titanate platelets, 9% of elastic graphite, 6% of ceramic fiber, 14% of silane-treated mineral fiber, 5% of molybdenum sulfide, 5% of calcium silicate hydrate and 30% of filler into a plow-rake type mixer to mix for 13 minutes to form a finished product of mixed ingredients;
thirdly, putting the finished product of the mixed ingredients into a hot vulcanizing machine for vulcanizing for 7 minutes, wherein the vulcanizing temperature of a mold of the hot vulcanizing machine is set at 150 ℃;
and step four, placing the vulcanized product obtained in the step three in a high-temperature curing furnace, curing for 2 hours at the set temperature within the range of 160 +/-2 ℃, and curing for 2 hours at the set temperature within the range of 180 +/-2 ℃.
And (3) testing results: the specific gravity is 1.95g/cm 3. Coefficient of high temperature friction: 0.36. average coefficient of friction: 0.40
In the case of the example 3, the following examples are given,
firstly, placing 2.5% aramid fiber in a plow-rake type mixer for pre-loosening for 8 minutes;
step two, pouring 12% of phenolic resin, 19% of potassium magnesium titanate platelets, 9% of elastic graphite, 6% of ceramic fiber, 11% of silane-treated mineral fiber, 5% of molybdenum sulfide, 5.5% of calcium silicate hydrate and 30% of filler into a plow-rake type mixer to mix for 15 minutes to form a finished product of mixed ingredients;
thirdly, putting the finished product of the mixed ingredients into a hot vulcanizing machine for vulcanizing for 4.5 minutes, wherein the vulcanizing temperature of a mold of the hot vulcanizing machine is set at 155 ℃;
and step four, placing the vulcanized product obtained in the step three in a high-temperature curing furnace, curing for 2 hours at the set temperature within the range of 160 +/-2 ℃, and curing for 2 hours at the set temperature within the range of 180 +/-2 ℃.
And (3) testing results: the specific gravity is 1.92g/cm 3. Coefficient of high temperature friction: 0.35. average coefficient of friction: 0.39
In the case of the example 4, the following examples are given,
firstly, placing 1.5% aramid fiber in a plow-rake type mixer for pre-loosening for 8 minutes;
step two, pouring 8% of phenolic resin, 17% of potassium magnesium titanate platelets, 8% of elastic graphite, 5% of ceramic fiber, 12% of silane-treated mineral fiber, 4% of molybdenum sulfide, 5% of calcium silicate hydrate and 41% of filler into a plow-rake type mixer to mix for 15 minutes to form a finished product of mixed ingredients;
thirdly, putting the finished product of the mixed ingredients into a hot vulcanizing machine for vulcanizing for 5 minutes, wherein the vulcanizing temperature of a mold of the hot vulcanizing machine is set at 155 ℃;
and step four, placing the vulcanized product obtained in the step three in a high-temperature curing furnace, curing for 2 hours at the set temperature within the range of 160 +/-2 ℃, and curing for 2 hours at the set temperature within the range of 180 +/-2 ℃.
And (3) testing results: the specific gravity is 1.93g/cm 3. Coefficient of high temperature friction: 0.37. average coefficient of friction: 0.41
In the case of the example 5, the following examples were conducted,
firstly, placing 3% aramid fiber in a plow-rake type mixer for pre-loosening for 8 minutes;
step two, pouring 10% of phenolic resin, 15% of potassium magnesium titanate platelets, 12% of elastic graphite, 8% of ceramic fiber, 18% of silane-treated mineral fiber, 6% of molybdenum sulfide, 5% of calcium silicate hydrate and 26% of filler into a plow-rake type mixer to mix for 15 minutes to form a finished product of mixed ingredients;
thirdly, putting the finished product of the mixed ingredients into a hot vulcanizing machine for vulcanizing for 4.5 minutes, wherein the vulcanizing temperature of a mold of the hot vulcanizing machine is set at 155 ℃;
and step four, placing the vulcanized product obtained in the step three in a high-temperature curing furnace, curing for 2 hours at the set temperature within the range of 160 +/-2 ℃, and curing for 2 hours at the set temperature within the range of 180 +/-2 ℃.
And (3) testing results: the specific gravity is 1.93g/cm 3. Coefficient of high temperature friction: 0.38. average coefficient of friction: 0.40
In the case of the example 6, it is shown,
firstly, placing 2.5% aramid fiber in a plow-rake type mixer for pre-loosening for 8 minutes;
step two, pouring 9.5 percent of phenolic resin, 12 percent of potassium magnesium titanate platelet, 12 percent of elastic graphite, 10 percent of ceramic fiber, 12 percent of silane treated mineral fiber, 4 percent of molybdenum sulfide, 5.5 percent of calcium silicate hydrate and 35 percent of filler into a plow-rake type mixer to mix for 15 minutes to form a finished product of mixed ingredients;
thirdly, putting the finished product of the mixed ingredients into a hot vulcanizing machine for vulcanizing for 5 minutes, wherein the vulcanizing temperature of a mold of the hot vulcanizing machine is set at 155 ℃;
and step four, placing the vulcanized product obtained in the step three in a high-temperature curing furnace, curing for 2 hours at the set temperature within the range of 160 +/-2 ℃, and curing for 2 hours at the set temperature within the range of 180 +/-2 ℃.
And (3) testing results: the specific gravity is 1.94g/cm 3. Coefficient of high temperature friction: 0.36. average coefficient of friction: 0.39
The test results of the six examples of the invention are analyzed, the specific weight average is between 1.9 and 2.0g/cm3, and the design requirements of light weight and low density are met. The high-temperature friction coefficients are all larger than 0.35, and the design purpose of improving the high-temperature friction performance of the product is achieved. In addition, in test tests, the six examples are found to have high friction performance stability, the friction coefficient is not changed greatly along with the temperature, the pressure and the speed, and the NVH performance of the vehicle in the use process of the product is ensured.
The following is a description of a stepwise heating curing process, which is an embodiment for proving the rationality of the stepwise heating curing process.
In the case of the example 7, the following examples are given,
firstly, placing 2.5% aramid fiber in a plow-rake type mixer for pre-loosening for 8 minutes;
step two, pouring 9.5 percent of phenolic resin, 12 percent of potassium magnesium titanate platelet, 12 percent of elastic graphite, 10 percent of ceramic fiber, 12 percent of silane treated mineral fiber, 4 percent of molybdenum sulfide, 5.5 percent of calcium silicate hydrate and 35 percent of filler into a plow-rake type mixer to mix for 15 minutes to form a finished product of mixed ingredients;
thirdly, putting the finished product of the mixed ingredients into a hot vulcanizing machine for vulcanizing for 5 minutes, wherein the vulcanizing temperature of a mold of the hot vulcanizing machine is set at 155 ℃;
and step four, placing the vulcanized product obtained in the step three in a high-temperature curing furnace, curing for 1 hour at the set temperature within the range of 160 +/-2 ℃, and curing for 3 hours at the set temperature within the range of 180 +/-2 ℃.
Test results: the specific gravity is 1.95g/cm 3. Coefficient of high temperature friction: 0.33. average coefficient of friction: 0.38
And (4) analyzing results: example 7 and example 6 are identical in formulation and process except for the heat curing process, but the test result is superior to example 7 in the performance of example 6 using the segmented heating mode established by the invention.
The reason is that sectional heating solidification is adopted, and the solidification is carried out for 2 hours at the temperature of 160 +/-2 ℃, so that the free phenol in the resin can be slowly and fully volatilized, the physical and chemical properties of the formed friction plate tend to be stable, and the phenomenon that gas is generated too fast when the heating solidification temperature is too high and bubbles are generated in the friction plate to form waste products is avoided; the molybdenum sulfide can be cured for 2 hours at 180 +/-2 ℃ to fully exert the high-temperature stable friction performance.
Claims (4)
1. The magnesium ceramic-based brake friction plate is characterized by comprising the following raw materials in parts by weight: 8-15% of phenolic resin, 10-20% of potassium magnesium titanate platelet, 5-15% of elastic graphite, 5-10% of ceramic fiber, 10-25% of silane-treated mineral fiber, 3-8% of molybdenum sulfide, 3-6% of calcium silicate hydrate, 1-4% of aramid fiber and 30-50% of filler.
2. The magnesium-ceramic-based brake friction plate according to claim 1, wherein the phenolic resin is a butyronitrile modified resin.
3. A magnesium ceramic based brake friction plate as claimed in claim 1, wherein the carbon content in said resilient graphite is greater than 99.5%; the magnesium content in the potassium magnesium titanate platelet is not lower than 25%; al in the ceramic fiber2O3The content is 30-40%; MoS in the molybdenum sulfide2The content of (A) is not less than 40%.
4. A method for preparing a magnesium ceramic-based brake friction plate, which is prepared from the mixed ingredient of claim 1, and is characterized by comprising the following steps of:
firstly, placing the aramid fiber in a plow-rake type mixer for pre-loosening for 5-10 minutes;
pouring phenolic resin, potassium magnesium titanate platelets, elastic graphite, ceramic fiber, silane treated mineral fiber, molybdenum sulfide, calcium silicate hydrate and filler into the plow-rake type mixer to mix for 10-15 minutes to form a finished product of mixed ingredients;
thirdly, putting the finished product of the mixed ingredients into a hot vulcanizing machine for vulcanizing for 5-10 minutes, wherein the vulcanizing temperature of a mold of the hot vulcanizing machine is set to be 145-155 ℃;
and step four, placing the vulcanized product obtained in the step three in a high-temperature curing furnace, curing for 2 hours at the set temperature within the range of 160 +/-2 ℃, and curing for 2 hours at the set temperature within the range of 180 +/-2 ℃.
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| CN101077912B (en) * | 2006-05-25 | 2011-03-09 | 洪建栋 | Asbestos-free non-metal friction material and preparation method thereof |
| CN102606660B (en) * | 2012-03-05 | 2015-10-14 | 临安华龙摩擦材料有限公司 | Magnetic clutch brake strip and preparation method thereof |
| JP6474544B2 (en) * | 2013-12-24 | 2019-02-27 | 日清紡ブレーキ株式会社 | Friction material |
| CN103788925A (en) * | 2014-02-19 | 2014-05-14 | 中国第一汽车股份有限公司 | Cross-country friction material composition for disc friction blocks and preparation method |
| CN103881657A (en) * | 2014-03-24 | 2014-06-25 | 烟台胜瑞制动系统有限公司 | Environmental ceramic base friction material free of copper or metal and preparation method of material |
| CN103992769B (en) * | 2014-05-05 | 2015-10-21 | 浙江杭摩欧亿汽车零部件有限公司 | A kind of car is used without copper high-performance environment protection type friction materials and preparation method |
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