CN113757278A - Aluminum alloy slice brake pad replacing copper fiber and preparation method thereof - Google Patents
Aluminum alloy slice brake pad replacing copper fiber and preparation method thereof Download PDFInfo
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- CN113757278A CN113757278A CN202010507851.0A CN202010507851A CN113757278A CN 113757278 A CN113757278 A CN 113757278A CN 202010507851 A CN202010507851 A CN 202010507851A CN 113757278 A CN113757278 A CN 113757278A
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- brake pad
- aluminum alloy
- copper
- fiber
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 39
- 239000010949 copper Substances 0.000 title claims abstract description 39
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 28
- 239000000835 fiber Substances 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000005011 phenolic resin Substances 0.000 claims abstract description 18
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 17
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 15
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 13
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 12
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000010428 baryte Substances 0.000 claims abstract description 11
- 229910052601 baryte Inorganic materials 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 239000013067 intermediate product Substances 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 6
- 239000002783 friction material Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920001342 Bakelite® Polymers 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 239000004637 bakelite Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- WRDNCFQZLUCIRH-UHFFFAOYSA-N 4-(7-azabicyclo[2.2.1]hepta-1,3,5-triene-7-carbonyl)benzamide Chemical compound C1=CC(C(=O)N)=CC=C1C(=O)N1C2=CC=C1C=C2 WRDNCFQZLUCIRH-UHFFFAOYSA-N 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 241000972773 Aulopiformes Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920000271 Kevlar® Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012643 polycondensation polymerization Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 235000019515 salmon Nutrition 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- DZXKSFDSPBRJPS-UHFFFAOYSA-N tin(2+);sulfide Chemical compound [S-2].[Sn+2] DZXKSFDSPBRJPS-UHFFFAOYSA-N 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
- F16D69/027—Compositions based on metals or inorganic oxides
-
- 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
-
- 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
-
- 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
- F16D2200/003—Light metals, e.g. aluminium
-
- 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
-
- 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
-
- 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
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0023—Shaping by pressure
Abstract
The invention discloses an aluminum alloy slice brake pad for replacing copper fiber and a preparation method thereof, wherein the brake pad does not contain copper components, and comprises the following components in parts by weight: 5-30 parts of aluminum alloy slices, 3-10 parts of phenolic resin, 2-6 parts of aramid fiber, 2-5 parts of friction powder, 5-15 parts of potassium titanate whiskers, 5-10 parts of antimony-free sulfide and 15-25 parts of barite. The brake pad does not contain copper components, so that in the actual braking process, under the friction action of a brake disc, dust generated by the brake pad does not contain the copper components, the pollution (particularly copper pollution) to the environment can be reduced, and the harm to organisms is reduced.
Description
Technical Field
The invention belongs to the field of automobile braking, and particularly relates to an aluminum alloy slice brake pad for replacing copper fibers and a preparation method thereof.
Background
The automobile brake system mainly comprises a brake disc, brake calipers and brake pads. The friction material in the brake pad and the brake disc rub against each other to form a reaction force, so that sufficient braking force is provided to accelerate the vehicle to slow down or stop. The friction material in the brake pad is used as a main consumed material during braking, and the service life of the brake pad of a common household car is about 3-5 kilometers. The basic components of the friction material are phenolic resin, rubber, copper powder or copper fiber, an abrasion increasing material, other fillers and the like, wherein copper is used as a composition component to play a role in heat conduction and lubrication.
During braking, the copper component is consumed and dust is generated, and investigations have shown that a large amount of copper pollution in the environment originates from the brake dust. High concentrations of copper in the environment have a biohazard effect. For example, salmon is extremely vulnerable. As environmental regulations become more stringent, some countries have enacted the use of copper in friction materials, such as 3 months and 19 days 2010, and the state owner in washington has signed a law on the eventual prohibition of using copper as a component of brake materials. The act will take effect in 2014. It is imperative to find alternative materials to copper in friction materials.
Disclosure of Invention
The first object of the present invention is to solve the above problems by providing an aluminum alloy sliced brake pad instead of copper fiber, which can replace the brake pad containing copper widely used in the prior art, thereby reducing the environmental pollution caused by the brake pad.
The second purpose of the invention is to provide a preparation method for preparing the brake pad.
The invention realizes the aim through the following technology, and the aluminum alloy slice brake pad for replacing copper fiber is characterized in that the brake pad does not contain copper components, and the brake pad comprises the following components in parts by weight: 5-30 parts of aluminum alloy slices, 3-10 parts of phenolic resin, 2-6 parts of aramid fiber, 2-5 parts of friction powder, 5-15 parts of potassium titanate whiskers, 5-10 parts of antimony-free sulfide and 15-25 parts of barite.
Preferably, the brake pad further comprises other fillers.
A preparation method of an aluminum alloy slice brake pad for replacing copper fiber is characterized by comprising the following steps:
s1, preparing raw materials of the brake pad;
s2, putting the raw materials into a hot-pressing die to be pressed and molded to obtain a first intermediate product;
s3, performing heat treatment on the first intermediate product to obtain a second intermediate product;
and S4, grinding and spraying the second intermediate product to obtain a finished product.
Preferably, the aluminum alloy slice, the phenolic resin, the aramid fiber, the friction powder, the potassium titanate whisker, the antimony-free sulfide and the barite are sequentially weighed according to the weight ratio and mixed to obtain the raw material.
Preferably, the mixing is stirring to mix uniformly.
Preferably, the heating temperature of the hot pressing mold is 150-.
Preferably, the pressurizing pressure of the hot-pressing mold is 13 to 18 Mpa.
Preferably, the pressing time of the hot press mold is 5 to 8 minutes.
Preferably, the temperature of the heat treatment is 170-.
Preferably, the time of the heat treatment is 2 to 5 hours.
The invention has the beneficial effects that:
(1) the brake pad does not contain copper components, so that in the actual braking process, under the friction action of a brake disc, dust generated by the brake pad does not contain the copper components, the pollution (particularly copper pollution) to the environment can be reduced, and the harm to organisms is reduced.
(2) The brake pad comprises the following components in parts by weight: the brake pad is prepared from the components of, by weight, 5-30 parts of aluminum alloy slices, 3-10 parts of phenolic resin, 2-6 parts of aramid fiber, 2-5 parts of friction powder, 5-15 parts of potassium titanate whiskers, 5-10 parts of antimony-free sulfide and 15-25 parts of barite.
(3) The invention also provides a preparation method of the brake pad, the brake pad prepared by the method has low production cost, is convenient to process and form, and the formed product has good performance and can meet the use requirement.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a flow chart of a method for preparing an aluminum alloy slice brake pad for replacing copper fiber provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to the aluminum alloy slice brake pad for replacing the copper fiber, the brake pad does not contain a copper component, and the brake pad comprises the following components in parts by weight: 5-30 parts of aluminum alloy slice, 3-10 parts of phenolic resin, 2-6 parts of aramid fiber, 2-5 parts of friction powder, 5-15 parts of potassium titanate whisker, 5-10 parts of antimony-free sulfide and 15-25 parts of barite, and because the brake pad does not contain a copper component, the dust generated by the brake pad does not contain the copper component under the friction action of a brake disc in the actual braking process, so that the pollution (especially copper pollution) to the environment can be reduced.
Specifically, the aluminum alloy slice is the main base material of the brake pad. Aluminum alloy is an alloy based on aluminum with a certain amount of other alloying elements added, and is one of light metal materials. In addition to the general characteristics of aluminum, aluminum alloys have certain alloy specific characteristics due to the variety and amount of alloying elements added. The aluminum alloy has the density of 2.63-2.85 g/cm, higher strength (sigma b of 110-650 MPa), specific strength close to that of high alloy steel, specific stiffness higher than that of steel, good casting performance and plastic processing performance, good electric conductivity and heat conductivity, good corrosion resistance and weldability, can be used as a structural material, and has wide application in aerospace, aviation, transportation, construction, electromechanics, lightening and daily necessities. The structure and processing of the aluminum alloy sections are well known to those skilled in the art and will not be described in detail herein.
The phenolic resin is also called bakelite, also called bakelite powder. The solid phenolic resin is yellow, transparent and amorphous massive substance, is reddish due to containing free phenol, has an average specific gravity of about 1.7, is easily soluble in alcohol, is insoluble in water, and is stable to water, weak acid and weak base solution. The resin is prepared by condensation polymerization of phenol and formaldehyde under the condition of catalyst, neutralization and water washing. The catalyst can be divided into two types of thermosetting and thermoplastic. The phenolic resin has good acid resistance, mechanical property and heat resistance, and is widely applied to industries of corrosion prevention engineering, adhesives, flame retardant materials, grinding wheel manufacturing and the like. The liquid phenolic resin is a yellow, dark brown liquid, such as: the alkaline phenolic resin is mainly used as a casting adhesive. The most important feature of phenolic resins is their high temperature resistance, which maintains their structural integrity and dimensional stability even at very high temperatures. For this reason, phenolic resins have only been used in high temperature applications, such as in the refractory, friction, binder and foundry industries. Therefore, the friction stability of the brake pad can be improved after the phenolic resin is added into the raw material of the brake pad.
Aramid fiber is called 'poly-p-phenylene terephthalamide' entirely, and the english is Aramid fiber (the trade name of dupont is Kevlar), is a novel high-tech synthetic fiber, has super high strength, high modulus and high temperature resistance, acid and alkali resistance, light weight and other excellent performances, and its intensity is 5 ~ 6 times of steel wire, and the modulus is 2 ~ 3 times of steel wire or glass fiber, and toughness is 2 times of steel wire, and weight is about 1/5 of steel wire only, under the temperature of 560 degrees, does not decompose, does not melt. It has good insulating property and ageing resistance, and has long life cycle. Therefore, the strength and the wear resistance of the brake pad can be improved after the aramid fiber is added into the raw materials of the brake pad.
Potassium titanate whisker is a trade name of fine potassium titanate (K2O-8TiO2) fiber, has more excellent characteristics than glass fiber and graphite fiber, and its application range has been widened continuously since the spread to the public for more than a decade. As an emerging material for replacing metal, the material can produce parts which are smaller and lighter than the traditional mechanical metal, meets the requirements of the modern times, and can also be used for replacing asbestos. The method is widely applied to new industrial fields such as automobiles, office automation machinery, information industry, environmental protection and the like. The potassium titanate whisker has the following advantages: (1) is a particularly excellent single crystal (1/1000 with size only of glass fiber); (2) high strength and good rigidity (same as the strength and rigidity of graphite); (3) low hardness (equivalent to aluminum only); (4) excellent aspect ratio (diameter of 0.1 to 0.6 μm, length of 3 to 20 μm); (5) the abrasion resistance is good. Therefore, the strength and the wear resistance of the brake pad can be further improved after the potassium titanate whisker is added into the raw material of the brake pad.
The antimony-free sulfide is a novel material applied to friction materials, and is a novel material which is safe and environment-friendly because antimony is not contained. In the high-temperature period of the friction material product, the decomposition speed of the organic adhesive can be reduced, the functions of the high-temperature inorganic adhesive and the lubricating friction regulator are achieved, and the heat fading resistance is good. Therefore, the friction stability and heat resistance of the brake pad can be further improved by adding the antimony-free sulfide to the raw material of the brake pad.
Barite is the most common mineral of barium, and its composition is barium sulfate. The barite is stable in chemical property, insoluble in water and hydrochloric acid, free of magnetism and toxicity, can be used as a filler of a brake pad raw material, and is beneficial to full play of the synergistic effect of all components, so that the brake pad can have stable friction coefficient, low wear rate, good heat resistance and other performances.
According to the aluminum alloy slice brake pad replacing the copper fiber, disclosed by the embodiment of the invention, as the brake pad does not contain a copper component, in the actual braking process, under the friction action of a brake disc, dust generated by the brake pad does not contain the copper component, so that the pollution (especially copper pollution) to the environment can be reduced, and in addition, the brake pad comprises the following components in parts by weight: the brake pad is prepared from the components of, by weight, 5-30 parts of aluminum alloy slices, 3-10 parts of phenolic resin, 2-6 parts of aramid fiber, 2-5 parts of friction powder, 5-15 parts of potassium titanate whiskers, 5-10 parts of antimony-free sulfide and 15-25 parts of barite.
In some embodiments, the brake pad further includes other fillers. The filler is one of the main components of the brake pad material and comprises various friction performance regulators and other compounding agents. The brake pad has the main function of adjusting the friction and wear performance, high-temperature friction coefficient, heat dissipation and noise of the brake pad material in multiple aspects, so that the brake pad can better meet the braking requirements under various extreme working conditions. For example, in the preparation of the brake pad, graphite, zinc sulfide, stannous sulfide, silicon oxide, aluminum oxide, iron yellow and the like may be added according to the requirements in addition to the above-mentioned components.
As shown in fig. 1, the method for preparing the aluminum alloy slice brake pad for replacing copper fiber according to the embodiment of the invention comprises the following steps:
s1, preparing raw materials of the brake pad;
s2, putting the raw materials into a hot-pressing die to be pressed and molded to obtain a first intermediate product;
s3, performing heat treatment on the first intermediate product to obtain a second intermediate product;
and S4, grinding and spraying the second intermediate product to obtain a finished product.
The brake pad prepared by the steps has low production cost, is convenient to machine and form, and the formed product has good performance and can meet the use requirement.
Specifically, in step S1, aluminum alloy chips, phenol resin, aramid fiber, friction powder, potassium titanate whisker, antimony-free sulfide, and barite are sequentially weighed in a weight ratio, and then the components are mixed to obtain the raw material.
In the mixing process, in order to obtain better preparation effect, the mixing is stirring mixing, and the mixing degree should be uniform.
In addition, in step S2, the heating temperature of the hot pressing mold is 150-.
In step S3, the first intermediate product needs to be subjected to a heat treatment to obtain a second intermediate product, the heat treatment refers to a metal hot working process in which the material is in a solid state, and the material is heated, kept warm and cooled to obtain a desired structure and properties, and common heat treatment processes include normalizing, annealing, tempering, quenching and tempering, and the like. The specific heat treatment process is selected according to actual requirements, and is not limited herein.
Preferably, the heat treatment temperature is 170-190 ℃, and the heat treatment time is 2-5 hours, so that the brake pad can obtain better heat treatment effect, and the corresponding physical property and chemical property can be improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The aluminum alloy slice brake pad capable of replacing copper fibers is characterized in that the brake pad does not contain copper components, and the brake pad comprises the following components in parts by weight: 5-30 parts of aluminum alloy slices, 3-10 parts of phenolic resin, 2-6 parts of aramid fiber, 2-5 parts of friction powder, 5-15 parts of potassium titanate whiskers, 5-10 parts of antimony-free sulfide and 15-25 parts of barite.
2. The copper fiber-substituted aluminum alloy slice brake pad of claim 1, wherein the brake pad further comprises other fillers.
3. A method for preparing a copper fiber-substituted aluminum alloy chip brake pad according to any one of claims 1 to 2, comprising the steps of:
s1, preparing raw materials of the brake pad;
s2, putting the raw materials into a hot-pressing die to be pressed and molded to obtain a first intermediate product;
s3, performing heat treatment on the first intermediate product to obtain a second intermediate product;
and S4, grinding and spraying the second intermediate product to obtain a finished product.
4. The preparation method according to claim 3, wherein the raw material is obtained by weighing the aluminum alloy chips, the phenolic resin, the aramid fiber, the friction powder, the potassium titanate whisker, the antimony-free sulfide and the barite in sequence according to the weight ratio and mixing the weighed materials.
5. The method of claim 4, wherein the mixing is stirred homogeneously.
6. The method as claimed in claim 3, wherein the heating temperature of the hot press mold is 150 ℃ and 163 ℃.
7. The production method according to claim 3, wherein the pressing pressure of the hot press mold is 13 to 18 Mpa.
8. The production method according to claim 3, wherein the pressing time of the hot press mold is 5 to 8 minutes.
9. The method as claimed in claim 3, wherein the temperature of the heat treatment is 170-190 ℃.
10. The method of claim 3, wherein the heat treatment is carried out for 2 to 5 hours.
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