CN107387617A - A kind of high temperature resistant low abrasion without metal brake block - Google Patents

A kind of high temperature resistant low abrasion without metal brake block Download PDF

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Publication number
CN107387617A
CN107387617A CN201710695418.2A CN201710695418A CN107387617A CN 107387617 A CN107387617 A CN 107387617A CN 201710695418 A CN201710695418 A CN 201710695418A CN 107387617 A CN107387617 A CN 107387617A
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parts
powder
brake block
graphite
nanometer
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CN201710695418.2A
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Chinese (zh)
Inventor
俞云伟
沈永生
方亮
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Hangzhou Xihu Friction Materials Co Ltd
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Hangzhou Xihu Friction Materials Co Ltd
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Priority to CN201710695418.2A priority Critical patent/CN107387617A/en
Publication of CN107387617A publication Critical patent/CN107387617A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02Composition of linings ; Methods of manufacturing
    • F16D69/023Composite materials containing carbon and carbon fibres or fibres made of carbonizable material
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00Materials not provided for elsewhere
    • C09K3/14Anti-slip materials; Abrasives
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00Materials; Production methods therefor
    • F16D2200/0034Materials; Production methods therefor non-metallic
    • F16D2200/0052Carbon
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00Materials; Production methods therefor
    • F16D2200/006Materials; Production methods therefor containing fibres or particles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00Materials; Production methods therefor
    • F16D2200/0082Production methods therefor
    • F16D2200/0086Moulding materials together by application of heat and pressure

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention belongs to brake block technical field, specifically disclose a kind of high temperature resistant low abrasion without metal brake block, be made up of following parts by weight component:7~23 parts of phenolic resin, 10~30 parts of Frication powder, 7~23 parts of graphite, 3~9 parts of coke blacking, 2~6 parts of butyronitrile powder, 5~15 parts of blanc fixe, 2~7 parts of montmorillonite nano powder, 2,4,6 3(Dimethylamino methyl)0.3~0.9 part of phenol, 7~23 parts of glass fibre, 2~8 parts of wood fibre, 10~17 parts of silicon carbide fibre, 4~10 parts of 5~15 part, nanometer Fluorspar Powder of tyre talc, 2~7 parts of Nano sepiolite powder, 3~9 parts of nanometer titanium dioxide silica aerogel powder, 2~6 parts of powdered whiting, 5~15 parts of silane coupler.The present invention's does not add asbestos, metal without metal brake block, and heat endurance is good, and heat resistanceheat resistant decline ability is strong, and coefficient of friction keeps stable at different temperatures, and wearability is high, and has certain noise reduction capability.

Description

A kind of high temperature resistant low abrasion without metal brake block
Technical field
The invention belongs to brake block technical field, and in particular to a kind of high temperature resistant low abrasion without metal brake block.
Background technology
Brake block is also brake rubber block, is the safety member of most critical in automobile brake system, the quality of braking effect is played Decisive role.The operation principle of brake is mainly to carry out self-friction, utilizes brake block and brake disc (drum) and tire and ground Friction, by vehicle advance kinetic energy be converted into friction after heat energy car is stopped.A set of good efficient brake system System must be able to provide stable, enough, controllable brake weight, and have good hydraulic pressure transfer and heat-sinking capability, to ensure The power that driver is applied from brake pedal sufficiently effective can pass to master cylinder and each wheel cylinder, and avoid the hydraulic pressure caused by high fever from losing Effect and brake decline, therefore it is required that brake block has moderate coefficient of friction, relatively low wear rate, good heat resistanceheat resistant decline performance And long lifespan.Existing brake block includes asbestos brake lining, metal brake block, semimetal or micro-metal brake pad and organic Resin brake block, wherein asbestos brake lining are the brake blocks used earliest, but because the carcinogenesis of asbestos is through banned Only use.Contain metal or alloy in metal brake block, semi-metallic brake pad or micro-metal brake pad, there is higher thermostabilization Property, but due to the defects of hardness causes greatly wear rate height, short life, big quality.The organic resin brake block used at present Middle addition inorfil is as skeleton reinforcement, and anti-wear performance is good, but there is also organic resin high temperature easily to decompose, the friction coefficient Temperature change is floated, and the shortcomings of brake block heat fading, have impact on the anti-wear performance of brake block, and the noise of brake block is big.
The brake of Chinese patent 2012105199690, a kind of bamboo charcoal composite fiber friction material of patent name and its manufacture Piece, preparation method, disclose has certain heat resistanceheat resistant by bamboo charcoal, organic fiber, the compounded brake block of coupling agent, brake block Declining property, but the organic resin added in brake block easily decomposes in emergency brake high temperature, influences the performance of brake block, and add Steel wool reduce the anti-wear performance of brake block.
The content of the invention
Being decomposed for existing organic resin brake block in high temperature causes heat fading and reduces braking quality and wearability Problem, it is an object of the invention to provide a kind of high temperature resistant low abrasion without metal brake block, does not add in brake block of the invention Add asbestos, metal, but there is good heat resistanceheat resistant decomposability, ensure heat resistanceheat resistant decline ability, coefficient of friction is kept stable, it is resistance to Mill performance is improved and safeguarded.
The present invention provides following technical scheme:
A kind of high temperature resistant low abrasion without metal brake block, be made up of the component of following parts by weight:7~23 parts of phenolic resin, rub 10~30 parts of crocus, 7~23 parts of graphite, 3~9 parts of coke blacking, 2~7 parts of montmorillonite nano powder, (the dimethylamino first of 2,4,6- tri- Base) 0.3~0.9 part of phenol, 2~6 parts of butyronitrile powder, 5~15 parts of blanc fixe, 7~23 parts of glass fibre, wood fibre 2~8 Part, 10~17 parts of silicon carbide fibre, 4~10 parts of 5~15 part, nanometer Fluorspar Powder of tyre talc, Nano sepiolite powder 2~7 part, nanometer 3~9 parts of aerosil powder, 2~6 parts of powdered whiting, 5~15 parts of silane coupler.
The present invention without metal brake block through phenolic resin, Frication powder, graphite, coke blacking, butyronitrile powder, blanc fixe, illiteracy De- stone nano powder, glass fibre, wood fibre, silicon carbide fibre, tyre talc, nanometer titanium dioxide silica aerogel powder, heavy carbonic acid Calcium, silane coupler, nanometer Fluorspar Powder, nanometer sepiolite part are made.Brake block does not contain asbestos, metal, avoids asbestos high temperature The defects of decomposition produces noxious material, and quality of brake pad is big.For brake block using phenolic resin as matrix, phenolic resin is by benzene Phenol, the formaldehyde thermoplastic resin that polycondensation is formed in acid medium, have certain mechanical strength and electrical insulation capability, thermostabilization Property good and toughness is big, viscosity is good, and butyronitrile powder can strengthen the toughness of phenolic resin.And fluorine and phenolic aldehyde in nanometer Fluorspar Powder Hydrogen in resin phenolic hydroxyl group forms hydrogen bond, the warm-up movement of the phenol-formaldehyde resin matrix of limitation, improves the heat resistance of phenolic resin, Nanometer Fluorspar Powder, Nano sepiolite powder have good heat endurance simultaneously.Nano sepiolite powder Mohs' hardness is 2.2~2.5, Quality is light, and raising anti-wear performance is obvious, and pore structure enriches, and sound-absorption and heat-insulation ability is strong.Graphite can form lubricant effect, improve The wear-resisting rate of brake block, while noise reduction.Tyre talc is elastic filler, plays a part of reinforced wear-resistant performance and reduces noise.Cover De- stone nano powder, Frication powder, blanc fixe heat endurance are good, the coefficient of friction of stable brake block and wear-resisting enduring quality.Coke The porosity of powder is high, and improving coefficient of friction simultaneously reduces brake noise, and heat fading when alleviating high temperature friction.Nanometer two Silica aerogel powder adhesive property is strong, heat endurance is good, strengthens the bonding of phenolic resin, nanometer titanium dioxide silica aerogel powder tool There is abundant hole, porosity is high, and thermal conductivity factor is small, with the mutual reinforcement of nanometer sepiolite part, makes the inside of brake block by surface The influence of high temperature is small, extends the life-span of brake block, and with absorbed portion analyte and grease brake block can be avoided to be layered bag. Powdered whiting heat endurance is good, and wearing valve is small, and be on the one hand connected enhancing heat endurance through silane coupler with organic resin, carries High heat resistanceheat resistant decline performance, on the other hand improves wearability.Wood fibre forms network skeleton in brake block, promotes each component It is dispersed.The heat resistance of glass fibre is high, high mechanical strength, the heat endurance of silicon carbide fibre, mechanical strength and wear-resisting Property it is good, both play a part of strengthening brake block heat endurance, mechanical strength and wearability by compound.Pass through above-mentioned each component Collective effect make the present invention without metal brake block heat resistanceheat resistant decomposability is strong, heat resistanceheat resistant decline ability is high, stable friction factor is resistance to Mill performance is improved and safeguarded, and caused noise is small in brake.
As a modification of the present invention, it is made up of the component of following parts by weight:11~19 parts of phenolic resin, Frication powder 18 ~22 parts, 13~17 parts of graphite, 5~7 parts of coke blacking, 3~6 parts of montmorillonite nano powder, 2,4,6- tri- (dimethylamino methyl) benzene 0.5~0.7 part of phenol, 3~5 parts of butyronitrile powder, 7~13 parts of blanc fixe, 13~17 parts of glass fibre, 4~6 parts of wood fibre, carbon 12~15 parts of SiClx fiber, 5~9 parts of 8~12 part, nanometer Fluorspar Powder of tyre talc, 3~6 parts of Nano sepiolite powder, nanometer titanium dioxide 5~7 parts of silica aerogel powder, 3~5 parts of powdered whiting, 8~12 parts of silane coupler.Entered by the addition for optimizing each component The heat resistanceheat resistant decline performance of one step lifting brake block, anti-wear performance.
As a modification of the present invention, the nanometer Fluorspar Powder uses after acid etching, and acid corrosion process is:By nanometer Fluorspar Powder is placed in the hydrochloric acid solution that concentration is 0.2~0.5mol/L soaks 30~60min at 30~40 DEG C, then takes out and passes through Water is placed in 400~500 DEG C of 1~2h of calcining in Muffle furnace after rinsing.The Mohs' hardness of nanometer Fluorspar Powder after acid etching 3.2 are reduced to by 4, the anti-wear performance of brake block is further improved.
As a modification of the present invention, the montmorillonite nano powder is modified through procedure below and is made:To montmorillonite nano The epoxy resin liquid of 0.1~0.32 times of weight and 90~150min of stirred in water bath at 75~85 DEG C, stirring are added dropwise in powder 25~35r/min of speed, then 120~140 DEG C of 10~12h of holding, 160~180 DEG C of holdings obtain infiltrating powder for 2~5 hours, Then grinding distribution makes infiltration powder particle size to 100~300nm.Epoxy resin is introduced in montmorillonite nano powder, makes montmorillonite Nano powder epoxy group enriches, and in brake block hot pressing process through 2,4,6- tri- (dimethylamino methyl) phenol effect with Phenolic resin crosslinking curing, enhance the heat endurance and heat resistanceheat resistant decline performance of phenolic resin.Montmorillonite after modified simultaneously Interlamellar spacing increase, got a promotion with organic resin and butyronitrile powder, the compatibility of tyre talc.The Mohs' hardness of montmorillonite is in addition 1, the anti-wear performance of brake block can be improved, strengthens the abrasion resistant effect of the components such as graphite.
As a modification of the present invention, graphite include particle diameter be respectively 25~40 μm large stretch of graphite, 10~18 μm Small pieces graphite, both mass ratioes are 1:0.5~0.3.Two-dimensional framework is formed by large stretch of graphite and improves the gas in brake block Porosity, lubrication is strengthened by small pieces graphite.
A kind of preparation method without metal brake block of high temperature resistant low abrasion, comprises the following steps:
(1) batch mixing:Each component raw material is sequentially added into plow harrow batch mixer according to certain charging sequence and is uniformly mixed so as to obtain mixing Material;(2) hot-press vulcanization:Mixed material is placed in hot pressing die, conventional program hot pressing sulphur is used in high tonnage hydraulic Change, 140~160 DEG C of press temperature, 20~30MPa of pressure obtain brake block;
(3) it is heat-treated:Brake block is placed in 15~18h of heating in 145~155 DEG C of heat-treatment furnace, is cooled to room temperature;
(4) flat head chamfering, mill outer arc, mill inner arc, drilling, the processing of outer arc fine grinding are carried out to brake block, marking knows and packaging and storage.
Ensure that each component is well mixed by certain charging sequence, and avoid the unity of each fiber and be destroyed;It is logical Cross hot-press vulcanization and make to crosslink between each component, complementary, invigoration effect;It is steady by the structure in heat treatment reinforcement brake block It is fixed.
One kind as the inventive method is improved, and mixing process is as follows in step (1):Sequentially added into plow harrow batch mixer Phenolic resin, butyronitrile powder, Frication powder, graphite, coke blacking, montmorillonite nano powder, 2,4,6- tri- (dimethylamino methyl) phenol, wheel Tire powder, nanometer Fluorspar Powder, Nano sepiolite powder mixing 20~30min, 15~25r/min of rotating speed;Then blanc fixe, again is added Matter calcium carbonate, silane coupler mixing 25~35min, 30~40r/min of rotating speed;It is fine to sequentially add glass fibre, carborundum Dimension mixing 45~60min, 20~28r/min of rotating speed;Then add wood fibre, nanometer titanium dioxide silica aerogel powder mixing 60~ 90min, 36~50r/min of rotating speed obtain mixed material, control mixed material drop temperature≤50 DEG C.First by phenolic resin, Butyronitrile powder etc. makes each component fully dispersed as Part I mixing, improves the reinforcing effect to phenolic resin.By blanc fixe, Powdered whiting is strengthened scattered as Part II.Glass fibre, silicon carbide fibre are made into carborundum as Part III addition Fiber plays the strengthening action to glass fibre.Using wood fibre, nanometer titanium dioxide silica aerogel powder fiber as Part IV Addition makes nanometer titanium dioxide silica aerogel powder be sufficiently mixed under the peptizaiton of wood fibre.Control the stir speed (S.S.) in each stage Dispersed, and the contact between interactive component that improves each component with the time, and avoid the unity of each fiber with It is and destroyed.
Beneficial effects of the present invention are as follows:
The present invention without asbestos, metal are not added in metal brake block, heat endurance is good, heat resistanceheat resistant decline ability it is strong, coefficient of friction Keep stable at different temperatures, wearability is high, and has certain noise reduction capability.
Embodiment
Just the embodiment of the present invention is described further below.
Unless otherwise instructed, the raw material employed in the present invention is commercially available or commonly used in the art, such as Without special instruction, the method in following embodiments is the conventional method of this area.
Embodiment 1
A kind of high temperature resistant low abrasion without metal brake block, be made up of following component:Phenolic resin 7g, Frication powder 10g, graphite 7g, coke blacking 3g, (dimethylamino methyl) the phenol 0.3g of montmorillonite nano powder 2g, 2,4,6- tri-, butyronitrile powder 2g, blanc fixe 5g, glass fibre 7g, wood fibre 2g, silicon carbide fibre 10g, tyre talc 5g, nanometer Fluorspar Powder 4g, Nano sepiolite powder 2g, Nanometer titanium dioxide silica aerogel powder 3g, powdered whiting 2g, silane coupler 5g.It is preferred that graphite is respectively 25 μm including particle diameter The mass ratio of large stretch of graphite, 10 μm of small pieces graphite, large stretch of graphite and small pieces graphite is 1:0.5.Montmorillonite nano powder preferably passes through The modified use of procedure below:The epoxy resin liquid of 0.1 times of weight and the water-bath at 75 DEG C are added dropwise into montmorillonite nano powder Middle stirring 90min, stir speed (S.S.) 25r/min, then 120 DEG C of holding 10h, 160 DEG C of holdings obtain infiltrating powder for 2 hours, then Grinding distribution makes infiltration powder particle size to 100~300nm.
Wherein nanometer Fluorspar Powder uses after acid etching, and acid corrosion process is:Nanometer Fluorspar Powder is placed in into concentration is 30min is soaked at 30 DEG C in 0.2mol/L hydrochloric acid solution, then takes out and 400 DEG C of calcinings in Muffle furnace is placed in after water rinses 1h.The Mohs' hardness of nanometer Fluorspar Powder after processing is 3.2.
A kind of preparation method without metal brake block of high temperature resistant low abrasion, comprises the following steps:
(1) batch mixing:Each component raw material is sequentially added into plow harrow batch mixer and be uniformly mixed so as to obtain mixed material according to charging sequence, it is excellent The process of the charging sequence of choosing is as follows:Phenolic resin, butyronitrile powder, Frication powder, graphite, coke are sequentially added into plow harrow batch mixer Powder, montmorillonite nano powder, 2,4,6- tri- (dimethylamino methyl) phenol, tyre talc, nanometer Fluorspar Powder, Nano sepiolite powder mixing 20min, rotating speed 15r/min;Then blanc fixe, powdered whiting, silane coupler mixing 25min, rotating speed 30r/ are added min;Sequentially add glass fibre, silicon carbide fibre mixing 45min, rotating speed 20r/min;Add wood fibre, nanometer two Silica aerogel powder mixing 60min, rotating speed 36r/min obtain mixed material, control mixed material drop temperature≤50 DEG C;
(2) hot-press vulcanization:Mixed material is placed in hot pressing die, conventional program hot pressing sulphur is used in high tonnage hydraulic Change, 140 DEG C of press temperature, pressure 20MPa obtain brake block;
(3) it is heat-treated:Brake block is placed in 145 DEG C of heat-treatment furnace and heats 15h, is cooled to room temperature, preferably 16 DEG C;
(4) flat head chamfering, mill outer arc, mill inner arc, drilling, the processing of outer arc fine grinding are carried out to brake block, marking knows and packaging and storage.
To improve the dispersed degree of phenolic resin, phenolic resin is crushed to through pulverizer before step (1) batch mixing The particle diameter of the particle of mass fraction more than 95% uses after being no more than 75 μm.
Embodiment 2
A kind of high temperature resistant low abrasion without metal brake block, be made up of following component:Phenolic resin 11g, Frication powder 18g, graphite 13g, coke blacking 5g, (dimethylamino methyl) the phenol 0.5g of montmorillonite nano powder 3g, 2,4,6- tri-, butyronitrile powder 3g, blanc fixe 7g, glass fibre 13g, wood fibre 4g, silicon carbide fibre 12g, tyre talc 8g, nanometer Fluorspar Powder 5g, Nano sepiolite powder 3g, Nanometer titanium dioxide silica aerogel powder 5g, powdered whiting 3g, silane coupler 8g.It is preferred that graphite is respectively 35 μm including particle diameter The mass ratio of large stretch of graphite, 15 μm of small pieces graphite, large stretch of graphite and small pieces graphite is 1:0.4.Montmorillonite nano powder preferably passes through The modified use of procedure below:The epoxy resin liquid of 0.21 times of weight and the water-bath at 80 DEG C are added dropwise into montmorillonite nano powder Middle stirring 120min, stir speed (S.S.) 30r/min, then 130 DEG C of holding 11h, 170 DEG C of holdings obtain infiltrating powder for 3.5 hours, so Grinding distribution makes infiltration powder particle size to 100~300nm afterwards.
Wherein nanometer Fluorspar Powder uses after acid etching, and acid corrosion process is:Nanometer Fluorspar Powder is placed in into concentration is 45min are soaked at 35 DEG C in 0.35mol/L hydrochloric acid solution, then takes out and 450 DEG C is placed in Muffle furnace after water rinses and forge 1.5h is burnt, the Mohs' hardness of the nanometer Fluorspar Powder after processing is 3.2.
A kind of preparation method without metal brake block of high temperature resistant low abrasion, comprises the following steps:
(1) batch mixing:Each component raw material is sequentially added into plow harrow batch mixer and be uniformly mixed so as to obtain mixed material according to charging sequence, it is excellent The process of the charging sequence of choosing is as follows:Phenolic resin, butyronitrile powder, Frication powder, graphite, coke are sequentially added into plow harrow batch mixer Powder, montmorillonite nano powder, 2,4,6- tri- (dimethylamino methyl) phenol, tyre talc, nanometer Fluorspar Powder, Nano sepiolite powder mixing 25min, rotating speed 20r/min;Then blanc fixe, powdered whiting, silane coupler mixing 30min, rotating speed 35r/ are added min;Sequentially add glass fibre, silicon carbide fibre mixing 55min, rotating speed 24r/min;Add wood fibre, nanometer two Silica aerogel powder mixing 75min, rotating speed 42r/min obtain mixed material, control mixed material drop temperature≤50 DEG C;
(2) hot-press vulcanization:Mixed material is placed in hot pressing die, conventional program hot pressing sulphur is used in high tonnage hydraulic Change, 145 DEG C of press temperature, pressure 25MPa obtain brake block;
(3) it is heat-treated:Brake block is placed in 150 DEG C of heat-treatment furnace and heats 16h, is cooled to room temperature, preferably 20 DEG C;
(4) flat head chamfering, mill outer arc, mill inner arc, drilling, the processing of outer arc fine grinding are carried out to brake block, marking knows and packaging and storage.
To improve the dispersed degree of phenolic resin, phenolic resin is crushed to through pulverizer before step (1) batch mixing The particle diameter of the particle of mass fraction more than 95% uses after being no more than 75 μm.
Embodiment 3
A kind of high temperature resistant low abrasion without metal brake block, be made up of following component:Phenolic resin 15g, Frication powder 15g, graphite 15g, coke blacking 6g, (dimethylamino methyl) the phenol 0.6g of montmorillonite nano powder 4.5g, 2,4,6- tri-, butyronitrile powder 4g, barite Powder 10g, glass fibre 15g, wood fibre 5g, silicon carbide fibre 13.5g, tyre talc 10g, nanometer Fluorspar Powder 7g, nanometer Hai Pao Stone flour 4.5g, nanometer titanium dioxide silica aerogel powder 6g, powdered whiting 4g, silane coupler 10g.It is preferred that graphite includes particle diameter point The mass ratio of large stretch of graphite that Wei be 35 μm, 15 μm of small pieces graphite, large stretch of graphite and small pieces graphite is 1:0.4.Montmorillonite is received Ground rice is preferably through the modified use of procedure below:Into montmorillonite nano powder be added dropwise 0.21 times of weight epoxy resin liquid and 80 DEG C of stirred in water bath 120min, stir speed (S.S.) 30r/min, then 130 DEG C of holding 11h, 170 DEG C of holdings obtain for 3.5 hours Powder is infiltrated, then grinding distribution makes infiltration powder particle size to 100~300nm.
Wherein nanometer Fluorspar Powder uses after acid etching, and acid corrosion process is:Nanometer Fluorspar Powder is placed in into concentration is 45min are soaked at 35 DEG C in 0.35mol/L hydrochloric acid solution, then takes out and 450 DEG C is placed in Muffle furnace after water rinses and forge 1.5h is burnt, the Mohs' hardness of the nanometer Fluorspar Powder after processing is 3.2.
A kind of preparation method without metal brake block of high temperature resistant low abrasion, comprises the following steps:
(1) batch mixing:Each component raw material is sequentially added into plow harrow batch mixer and be uniformly mixed so as to obtain mixed material according to charging sequence, it is excellent The process of the charging sequence of choosing is as follows:Phenolic resin, butyronitrile powder, Frication powder, graphite, coke are sequentially added into plow harrow batch mixer Powder, montmorillonite nano powder, 2,4,6- tri- (dimethylamino methyl) phenol, tyre talc, nanometer Fluorspar Powder, Nano sepiolite powder mixing 25min, rotating speed 20r/min;Then blanc fixe, powdered whiting, silane coupler mixing 30min, rotating speed 35r/ are added min;Sequentially add glass fibre, silicon carbide fibre mixing 55min, rotating speed 24r/min;Add wood fibre, nanometer two Silica aerogel powder mixing 75min, rotating speed 42r/min obtain mixed material, control mixed material drop temperature≤50 DEG C;
(2) hot-press vulcanization:Mixed material is placed in hot pressing die, conventional program hot pressing sulphur is used in high tonnage hydraulic Change, 150 DEG C of press temperature, pressure 25MPa obtain brake block;
(3) it is heat-treated:Brake block is placed in 150 DEG C of heat-treatment furnace and heats 16.5h, is cooled to room temperature, preferably 23 DEG C;
(4) flat head chamfering, mill outer arc, mill inner arc, drilling, the processing of outer arc fine grinding are carried out to brake block, marking knows and packaging and storage.
To improve the dispersed degree of phenolic resin, phenolic resin is crushed to through pulverizer before step (1) batch mixing The particle diameter of the particle of mass fraction more than 95% uses after being no more than 75 μm.
Embodiment 4
A kind of high temperature resistant low abrasion without metal brake block, be made up of following component:Phenolic resin 19g, Frication powder 22g, graphite 17g, coke blacking 7g, (dimethylamino methyl) the phenol 0.7g of montmorillonite nano powder 6g, 2,4,6- tri-, butyronitrile powder 5g, blanc fixe 13g, glass fibre 17g, wood fibre 6g, silicon carbide fibre 15g, tyre talc 12g, nanometer Fluorspar Powder 9g, Nano sepiolite powder 6g, nanometer titanium dioxide silica aerogel powder 7g, powdered whiting 5g, silane coupler 12g.It is preferred that graphite is respectively 35 including particle diameter μm large stretch of graphite, 15 μm of small pieces graphite, the mass ratio of large stretch of graphite and small pieces graphite is 1:0.4.Montmorillonite nano powder is excellent Choosing is through the modified use of procedure below:The epoxy resin liquid of 0.21 times of weight is added dropwise into montmorillonite nano powder and at 80 DEG C Stirred in water bath 120min, stir speed (S.S.) 30r/min, then 130 DEG C of holding 11h, 170 DEG C of holdings obtain infiltrating powder for 3.5 hours Material, then grinding distribution makes infiltration powder particle size to 100~300nm.
Wherein nanometer Fluorspar Powder uses after acid etching, and acid corrosion process is:Nanometer Fluorspar Powder is placed in into concentration is 45min are soaked at 35 DEG C in 0.35mol/L hydrochloric acid solution, then takes out and 450 DEG C is placed in Muffle furnace after water rinses and forge 1.5h is burnt, the Mohs' hardness of the nanometer Fluorspar Powder after processing is 3.2.
A kind of preparation method without metal brake block of high temperature resistant low abrasion, comprises the following steps:
(1) batch mixing:Each component raw material is sequentially added into plow harrow batch mixer by charging sequence and be uniformly mixed so as to obtain mixed material, preferably Charging sequence process it is as follows:Phenolic resin, butyronitrile powder, Frication powder, graphite, coke are sequentially added into plow harrow batch mixer Powder, montmorillonite nano powder, 2,4,6- tri- (dimethylamino methyl) phenol, tyre talc, nanometer Fluorspar Powder, Nano sepiolite powder mixing 25min, rotating speed 20r/min;Then blanc fixe, powdered whiting, silane coupler mixing 30min, rotating speed 35r/ are added min;Sequentially add glass fibre, silicon carbide fibre mixing 55min, rotating speed 24r/min;Add wood fibre, nanometer two Silica aerogel powder mixing 75min, rotating speed 42r/min obtain mixed material, control mixed material drop temperature≤50 DEG C;
(2) hot-press vulcanization:Mixed material is placed in hot pressing die, conventional program hot pressing sulphur is used in high tonnage hydraulic Change, 155 DEG C of press temperature, pressure 25MPa obtain brake block;
(3) it is heat-treated:Brake block is placed in 150 DEG C of heat-treatment furnace and heats 17h, is cooled to room temperature, preferably 25 DEG C;
(4) flat head chamfering, mill outer arc, mill inner arc, drilling, the processing of outer arc fine grinding are carried out to brake block, marking knows and packaging and storage.
To improve the dispersed degree of phenolic resin, phenolic resin is crushed to through pulverizer before step (1) batch mixing The particle diameter of the particle of mass fraction more than 95% uses after being no more than 75 μm.
Embodiment 5
A kind of high temperature resistant low abrasion without metal brake block, be made up of following component:Phenolic resin 23g, Frication powder 30g, graphite 23g, coke blacking 9g, (dimethylamino methyl) the phenol 0.9g of montmorillonite nano powder 7g, 2,4,6- tri-, butyronitrile powder 6g, blanc fixe 15g, glass fibre 23g, wood fibre 8g, silicon carbide fibre 17g, tyre talc 15g, nanometer Fluorspar Powder 10g, Nano sepiolite powder 7g, nanometer titanium dioxide silica aerogel powder 9g, powdered whiting 6g, silane coupler 15g.It is preferred that graphite is respectively 40 including particle diameter μm large stretch of graphite, 18 μm of small pieces graphite, the mass ratio of large stretch of graphite and small pieces graphite is 1:0.3.Montmorillonite nano powder is excellent Choosing is through the modified use of procedure below:The epoxy resin liquid of 0.32 times of weight is added dropwise into montmorillonite nano powder and at 85 DEG C Stirred in water bath 150min, stir speed (S.S.) 35r/min, then 140 DEG C of holding 12h, 180 DEG C of holdings obtain infiltrating powder for 5 hours, Then grinding distribution makes infiltration powder particle size to 300nm.
Wherein nanometer Fluorspar Powder uses after acid etching, and acid corrosion process is:Nanometer Fluorspar Powder is placed in into concentration is 60min is soaked at 40 DEG C in 0.5mol/L hydrochloric acid solution, then takes out and 500 DEG C of calcinings in Muffle furnace is placed in after water rinses 2h.The Mohs' hardness of nanometer Fluorspar Powder after processing is 3.2.
A kind of preparation method without metal brake block of high temperature resistant low abrasion, comprises the following steps:
(1) batch mixing:Each component raw material is sequentially added into plow harrow batch mixer and be uniformly mixed so as to obtain mixed material according to charging sequence, it is excellent The process of the charging sequence of choosing is as follows:Phenolic resin, butyronitrile powder, Frication powder, graphite, coke are sequentially added into plow harrow batch mixer Powder, montmorillonite nano powder, 2,4,6- tri- (dimethylamino methyl) phenol, tyre talc, nanometer Fluorspar Powder, Nano sepiolite powder mixing 30min, rotating speed 25r/min;Then blanc fixe, powdered whiting, silane coupler mixing 35min, rotating speed 40r/ are added min;Sequentially add glass fibre, silicon carbide fibre mixing 60min, rotating speed 28r/min;Add wood fibre, nanometer two Silica aerogel powder mixing 90min, rotating speed 50r/min obtain mixed material, control mixed material drop temperature≤50 DEG C;
(2) hot-press vulcanization:Mixed material is placed in hot pressing die, conventional program hot pressing sulphur is used in high tonnage hydraulic Change, 160 DEG C of press temperature, pressure 30MPa obtain brake block;
(3) it is heat-treated:Brake block is placed in 155 DEG C of heat-treatment furnace and heats 18h, is cooled to room temperature, preferably 26 DEG C;
(4) flat head chamfering, mill outer arc, mill inner arc, drilling, the processing of outer arc fine grinding are carried out to brake block, marking knows and packaging and storage.
To improve the dispersed degree of phenolic resin, phenolic resin is crushed to through pulverizer before step (1) batch mixing The particle diameter of the particle of mass fraction more than 95% uses after being no more than 75 μm.
Performance test
Prepared by embodiment 1~5 carries out brake noise, density, hardness, impact strength, shear strength, heat without metal brake block The measure of the index such as the physical properties such as expansion rate and wear rate, coefficient of friction, normative reference GB5763-2008, the results are shown in Table 1st, table 2, embodiment 1~5 are respectively labeled as example 1~5.
The quantitative measurement of table 1
Project Density Hardness Impact strength Shear strength Thermal expansion Brake noise
Unit g/cm3 HRL dJ/cm2 MPa % dB
Equipment Balance very much Rockwell apparatus Shock machine Cupping machine Expansion test machine Laser vibration measurer
As a result 1.9~2.1 82~105 3.3~4.1 8.12~8.58 1.2~2.3 35~46
The friction testing of table 2
The wear rate of table 3 is tested
From table 1~3 as can be seen that the present invention prepare without metal brake block is light, hardness is high, impact strength is big, shear strength Height, thermal expansion effects are small, and brake noise is low, and coefficient of friction is moderate, and vary with temperature small, and stability is good, and wear rate is low, There is good heat resistanceheat resistant decline performance, anti-wear performance without metal brake block.

Claims (7)

1. a kind of high temperature resistant low abrasion without metal brake block, it is characterised in that the no metal brake block is by following parts by weight Component be made:7~23 parts of phenolic resin, 10~30 parts of Frication powder, 7~23 parts of graphite, 3~9 parts of coke blacking, montmorillonite nano 2~7 parts of powder, 2,4,6- tri-(Dimethylamino methyl)0.3~0.9 part of phenol, 2~6 parts of butyronitrile powder, 5~15 parts of blanc fixe, glass 7~23 parts of glass fiber, 2~8 parts of wood fibre, 10~17 parts of silicon carbide fibre, part, nanometer Fluorspar Powder 4~10 of tyre talc 5~15 Part, 2~7 parts of Nano sepiolite powder, 3~9 parts of nanometer titanium dioxide silica aerogel powder, 2~6 parts of powdered whiting, silane coupler 5 ~15 parts.
2. high temperature resistant low abrasion according to claim 1 without metal brake block, it is characterised in that by following parts by weight Component is made:11~19 parts of phenolic resin, 18~22 parts of Frication powder, 13~17 parts of graphite, 5~7 parts of coke blacking, montmorillonite nano 3~6 parts of powder, 2,4,6- tri-(Dimethylamino methyl)0.5~0.7 part of phenol, 3~5 parts of butyronitrile powder, 7~13 parts of blanc fixe, glass 13~17 parts of glass fiber, 4~6 parts of wood fibre, 12~15 parts of silicon carbide fibre, part, nanometer Fluorspar Powder 5~9 of tyre talc 8~12 Part, 3~6 parts of Nano sepiolite powder, 5~7 parts of nanometer titanium dioxide silica aerogel powder, 3~5 parts of powdered whiting, silane coupler 8 ~12 parts.
3. high temperature resistant low abrasion according to claim 1 or 2 without metal brake block, it is characterised in that the nanometer firefly Stone flour uses after acid etching, and acid corrosion process is:Nanometer Fluorspar Powder is placed in the hydrochloric acid solution that concentration is 0.2~0.5mol/L In at 30~40 DEG C soak 30~60min, then take out and be placed in after water rinses in Muffle furnace 400~500 DEG C of calcinings 1~ 2h。
4. high temperature resistant low abrasion according to claim 1 or 2 without metal brake block, it is characterised in that the montmorillonite Nano powder is through the modified use of procedure below:The epoxy resin liquid of 0.1~0.32 times of weight is added dropwise into montmorillonite nano powder And in 75~85 DEG C of 90~150min of stirred in water bath, 25~35r/min of stir speed (S.S.), then 120~140 DEG C keep 10~ 12h, 160~180 DEG C keep obtaining within 2~5 hours infiltrating powder, then grinding distribution make infiltration powder particle size to 100~ 300nm。
5. high temperature resistant low abrasion according to claim 1 or 2 without metal brake block, it is characterised in that graphite includes grain Footpath be respectively 25~40 μm large stretch of graphite, 10~18 μm of small pieces graphite, both mass ratioes be 1:0.5~0.3.
6. the preparation method without metal brake block of the high temperature resistant low abrasion as described in claim 1 to 5 is any, including following step Suddenly:
(1)Batch mixing:Each component raw material is sequentially added into plow harrow batch mixer according to certain charging sequence and is uniformly mixed so as to obtain mixing Material;
(2)Hot-press vulcanization:Mixed material is placed in hot pressing die, conventional program hot pressing sulphur is used in high tonnage hydraulic Change, 140~160 DEG C of press temperature, 20~30MPa of pressure obtain brake block;
(3)Heat treatment:Brake block is placed in 15~18h of heating in 145~155 DEG C of heat-treatment furnace, is cooled to room temperature;
(4)Flat head chamfering, mill outer arc, mill inner arc, drilling, the processing of outer arc fine grinding are carried out to brake block, marking knows and packaging and storage.
7. the preparation method without metal brake block of high temperature resistant low abrasion according to claim 6, it is characterised in that step (1)Middle mixing process is as follows:Phenolic resin, butyronitrile powder, Frication powder, graphite, coke blacking, illiteracy are sequentially added into plow harrow batch mixer De- stone nano powder, 2,4,6- tri-(Dimethylamino methyl)Phenol, tyre talc, nanometer Fluorspar Powder, Nano sepiolite powder mixing 20~ 30min, 15~25r/min of rotating speed;Then blanc fixe, powdered whiting, silane coupler are added and mixes 25~35min, is turned 30~40r/min of speed;Sequentially add glass fibre, silicon carbide fibre mixing 45~60min, 20~28r/min of rotating speed;Then Add wood fibre, the mixing of nanometer titanium dioxide silica aerogel powder 60~90min, 36~50r/min of rotating speed obtain mixed material, control Mixed material drop temperature≤50 DEG C processed.
CN201710695418.2A 2017-08-15 2017-08-15 A kind of high temperature resistant low abrasion without metal brake block Pending CN107387617A (en)

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CN108443376A (en) * 2018-03-22 2018-08-24 捷通磨擦材料(昆山)有限公司 A kind of explosion-proof mine mechanical brake piece and preparation method thereof
CN108953436A (en) * 2018-07-27 2018-12-07 杭州西湖摩擦材料有限公司 A kind of preparation method of no metallic fiber brake block
CN108953435A (en) * 2018-07-27 2018-12-07 杭州西湖摩擦材料有限公司 A kind of no metallic fiber brake block
CN108948650A (en) * 2018-07-28 2018-12-07 万玉梅 A kind of preparation method of low abrasion refractory ceramics brake block

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Publication number Priority date Publication date Assignee Title
CN108443376A (en) * 2018-03-22 2018-08-24 捷通磨擦材料(昆山)有限公司 A kind of explosion-proof mine mechanical brake piece and preparation method thereof
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CN108948650A (en) * 2018-07-28 2018-12-07 万玉梅 A kind of preparation method of low abrasion refractory ceramics brake block

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Application publication date: 20171124