CN102330763B - Nano-material-added car brake block and method for manufacturing same - Google Patents
Nano-material-added car brake block and method for manufacturing same Download PDFInfo
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- CN102330763B CN102330763B CN 201110216465 CN201110216465A CN102330763B CN 102330763 B CN102330763 B CN 102330763B CN 201110216465 CN201110216465 CN 201110216465 CN 201110216465 A CN201110216465 A CN 201110216465A CN 102330763 B CN102330763 B CN 102330763B
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Abstract
The invention relates to a car brake block. The ingredient components of the car brake block comprise modified phenol-formaldehyde resin, modified nitrile rubber, nano calcium carbonate, carbon fiber, steel fiber, mineral fiber, graphite, vermiculite, zinc powder and molybdenum disulfide. The phenol-formaldehyde resin, the nitrile rubber and the nano calcium carbonate are all subjected to modification. The invention further provides a method for manufacturing the car brake block. The nano-material-added car brake block provided by the invention has the advantages of stable friction factor, strong heat-fade resistance, small attrition rate, low vibration noise, good toughness, high temperature resistance, no damage to coupling and the like, thus the nano-material-added car brake block is an ideal substitute of a semi-metallic brake block.
Description
Technical field
The present invention relates to a kind of brake pad of car and preparation method thereof, particularly relate to a kind of brake pad of car that has added nanometer material and preparation method thereof.
Background technique
Brake block is the vital component of motor vehicle, and the safety that the quality of braking quality directly concerns driving whether.Since first automobile is born with brake block, people are constantly improving the various performances of brake block always, continuous progress along with automotive industry, automobile is also constantly improving the requirement of brake block, especially to the thermostability of brake block, wear resistance, character of heat-fading etc. is had higher requirement.
Phenolic resin is brake block a kind of Bond commonly used, phenolic resin self has excellent mechanicalness, dimensional stability, shaping operation, flame retarding, and it is cheap, therefore phenolic resin is chosen as the raw material of automobile brake sheet, but, the phenolic hydroxyl group when high temperature in the phenolic resin and the easy oxidation of mute methyl, poor heat resistance, therefore need carry out modification to phenolic resin and handle, improve its toughness and heat resistance.There have been a lot of research and trial in the STUDY ON THE MODIFICATION OF PENOLIC RESIN aspect, but mostly has shortcomings such as complex process, realization of industrialization difficulty, so mostly do not enter actual operational phase.
Rubber additive through using always in brake block is nitrile butadiene rubber, nitrile butadiene rubber is a kind of synthetic rubber that is made by butadiene and acrylonitrile compolymer, has excellent oil resistance, but because nitrile butadiene rubber is the non-crystalline type amorphous rubber, its tensile strength is very low, and use value is not high.Nitrile butadiene rubber will carry out modification and handle before use, improves the tensile strength of nitrile butadiene rubber, and the adhesiveness of raising and other materials.Through long-term application with discover in nitrile butadiene rubber and to add activated zinc oxide and other materials can both make the performance of nitrile butadiene rubber improve, a large amount of experiment and set out on a journey and show that the characteristic of nitrile butadiene rubber is also had great potentialities and can be dug.
Friction factor modifier commonly used has graphite, mica, talcum, feldspar, iron powder, zinc powder, copper powder, vermiculite, rubber, BaSO
4, calcium carbonate etc., so-called frictional behaviour refers to: the raising of 1 friction factor; Stablizing of 2 friction factor; 3 fine temperature tolerances, the tensile strength that calcium carbonate can well be regulated brake block as a kind of additive, impact strength, toughness, hardness and wear resistance, calcium carbonate can be brought into play more superior performance after handling through modification.
Along with the progress of science and technology, materials science has also had very big development, and begin to occur nanometer material the eighties in 20th century, many subjects such as that nanometer material comprises is inorganic, organic, physics, biology.Nanometer material refers to that in three dimensional space basic unit body has at least one dimension to be in the interior material of nanoscale scope.For improving the braking ability of brake block, nanometer material has obtained extensive concern, by adding different nanometer materials, makes brake block friction material change in microstructure, can effectively improve the braking ability of brake block.In recent years, in to phenolic resin modified research, adopting nanometer material is the new direction of this area research to its modification, also is in the exploratory stage at present.
When material forms nanostructured, can produce " nano effect ", so-called " nano effect " comprises following five effects: small-size effect, surface and interface effect, quantum size effect, coulomb obstruction and quantum tunneling and macro quanta tunnel effect.Have these special nature just because of nanometer material, we add nanometer material in brake block, and great changes will take place before the performance of brake block each side is not more added, and makes braking quality be greatly improved.
Summary of the invention
The object of the present invention is to provide a kind of traditional brake block defective that overcomes, high temperature resistant, stable friction factor is good, and it is little to wear and tear, and does not hinder the nanometer material brake pad of car of antithesis.
Another object of the present invention is to provide the manufacturing process of this nanometer material brake pad of car.
The invention provides a kind of brake pad of car, its furnish component comprises phenol-formaldehyde resin modified, modified butadiene acrylonitrile rubber, nano-calcium carbonate, reinforcing fiber and frictional property regulator.
The present invention the important performance of improving brake block Bond commonly used, thereby improve the mechanical property of brake block, dimensional stability, shaping operation, flame retarding, what adopt among the present invention is phenolic resin, phenolic resin is widely used in the brake block as Bond, a large number of users has confirmed that phenolic resin is without modification, be difficult to the ideal effect that reaches above-mentioned, STUDY ON THE MODIFICATION OF PENOLIC RESIN there is multiple measure, but effect is not seen very good report the present invention so far phenolic resin is added nanometer material as the main direction of modification, in nearly eight kinds nanometer material is tested, selectes TIO
2As phenolic resin modified additive.Through nano material modified phenolic resins, because the size of nanometer material is little, specific surface area is big, can realize and the good combination of phenolic resin, having overcome the adding rigid material only gains in strength, can not increase the shortcoming of toughness, adding nanometer material can produce special influence to the physical and chemical performance of phenolic resin, improves toughness, intensity and the wear resistance of phenolic resin, and can improve the embrittlement phenomenon of phenolic resin effectively.
Because nanometer material has very big specific surface area and high surface energy, has very strong agglomeration, adopts conventional method to be difficult to make its even dispersion, adopts the original position method of formation that it is handled, the purpose to dispersion that reaches, wherein TiO
2Quality be 6% of phenolic resin quality.The advantage of original position method of formation is not need the prepared beforehand nanometer material, so just avoided the reunion of nanometer material in storage and transportation process, thereby it is compound to generate the realization organic and inorganic by chemical reaction by atom, molecule original position by nanometer material under the controlled environment that the resin body provides, and the yardstick of inorganic component is controlled in the nanometer range in this process.Generated in-situ titanium dioxide granule has good dispersiveness and combination force in phenolic resin as matrix resin, can significantly improve cohesive force, particle diameter on average about 70nm, specific surface area 60-90m
2/ g can improve crystallizing power, thermostability, ageing resistance, the tensile strength of phenolic resin, thereby prolongs the working life of brake block.
Nitrile butadiene rubber is by adding nanometer SiO
2Carry out modification, nanometer SiO
2To pass through the modification of coupling agent surface coverage before use, the modification of coupling agent surface coverage is exactly to utilize the surface of coupling agent molecule and nanometer material to carry out certain chemical reaction, make coupling agent cover nano-material surface uniformly, thus the method that the character of nano-material surface is changed.Described coupling agent is titanate esters, and concrete steps are:
(1) with nanometer SiO
2Under 300 ℃ temperature, dry 3h;
(2) dilute titanate esters with anhydrous alcohol, its consumption is nanometer SiO
28% of quality;
(3) titanate esters after will diluting adds and fills nanometer SiO
2Container in, adopt ultrasound to disperse, guarantee that titanate coupling agent sticks to nanometer SiO uniformly
2The surface;
(4) the ultrasonic dispersion of process 1.5h is with nanometer SiO
2Leach, clean with anhydrous alcohol, put into the baking box oven dry, drying time is 2h, obtains the nanometer SiO2 of modification.
Nanometer SiO through surface modification
2Have good dispersiveness, and good compatibility is arranged.With the nanometer SiO after handling
2Join in the nitrile butadiene rubber powder, make nanometer SiO by churned mechanically method
2Mix uniformly with nitrile butadiene rubber.
Nano-calcium carbonate needs to carry out modification before use to be handled, and is specially
(1) take by weighing an amount of nano-calcium carbonate and be dissolved in a certain amount of anhydrous alcohol, ultrasound disperses 1.5h;
(2) take by weighing a certain amount of acrylic acid and be dissolved in the distilled water, ultrasound disperses 20min;
(3) in the nano-calcium carbonate after disperseing to ultrasound, slowly drip scattered acrylic acid aqueous solution, and add a spot of ammoniacal liquor, the pH value of regulator solution is under 70 ℃ condition, with 120 rev/mins speed stirring 4h;
(4) be cooled to room temperature, suction filtration;
(5) clean the nano-calcium carbonate that firm suction filtration goes out repeatedly with deionized water, then, put into the thermoelectric oven oven dry;
(6) add anhydrous alcohol, methyl methacrylate monomer and azodiisobutyronitrile initator in the nano-calcium carbonate after oven dry, ammoniacal liquor regulator solution pH value continues prepolymerization 10h under the stirring at 80 ℃;
(7) suction filtration repeatedly after the flushing, is dried in baking oven, obtains the nano-calcium carbonate of modification.
In the described step (2), acrylic acid consumption is 9% of nano-calcium carbonate quality; In the described step (3), drip scattered acrylic acid aqueous solution in 10 minutes; In the described step (6), the consumption of methyl methacrylate monomer is 5% of nano-calcium carbonate quality.
The mass percent of the furnish component of described brake block is preferably:
Phenol-formaldehyde resin modified: 10-14%,
Modified butadiene acrylonitrile rubber: 2%,
Nano-calcium carbonate: 10%,
Reinforcing fiber: 48-49% and
Frictional property regulator 25-30%.
Except above three kinds of nanometer materials, other components role in brake block of brake block is very important, nanometer material and other materials one work, could give play to its performance better, specified the effect that reinforcing fiber and other frictional property regulator play below in brake block.
Reinforcing fiber plays the effect of strengthening mechanical strength to friction material in the brake block, makes friction material can bear impulsive load and shearing force in braking process, and can enough bear various impact forces, shearing force and pressure in course of working.Described reinforcing fiber preferably includes carbon fiber, Steel Fibre and mineral fibre.
Carbon fiber has high specific strength and specific modulus, have higher wear resistance, heat resistance simultaneously, but undressed carbon fiber surface is smooth, inertia big, the surface can be low, poor with the combination of resin body, oxidation appears when high temperature easily, influence the combination property of composite material, properties of carbon can not be brought into play fully.It mainly is that using plasma is handled the surface of carbon fiber that the modification of carbon fiber is handled, and through plasma treatment, carbon fiber surface generation chemical reaction, improves the performance of fiber surface.Plasma treatment adopts sub zero treatment, namely at 0-150 ℃, pressure produces plasma under 0.1-0.3MPa, treated carbon fiber and resin body have good associativity, the advantage of plasma method Treatment of Carbon is only to be worked in its surface in the process of handling, its inside is influenced hardly, so the advantage of carbon fiber itself is unaffected, use low-temperature plasma to carbon fiber surface, temperature is lower, avoid high temperature that fiber is caused brokenly meeting, and just can reach the effect of demand in a short period of time.
Steel Fibre has good mechanical property, thermal conductivity is good, also relatively good with the compatibility of resin, in the material of brake block, add Steel Fibre and can improve the impact strength of brake block and the friction factor of material, but the content of Steel Fibre is unsuitable too high, experiment shows, when the content of Steel Fibre in the material of brake block surpasses 22%, the impact strength of brake block no longer raises along with the rising of the content of steel fiber in the brake block, continuation rising along with content of steel fiber, when surpassing 25%, the friction factor of the material of brake block also no longer increases, and wear rate increases with the increase of content of steel fiber on the contrary.Because Steel Fibre has good thermal conductivity, can improve the heat resistance of brake block to a certain extent, again in the braking process, the brake block surface can produce a large amount of heats, can make the portion of hot amount be diffused into brake block inside by Steel Fibre, avoid the too high brake block adhesion that causes of local temperature or the phenomenon of braking failure.Steel Fibre is exposed in the air for a long time, and corrosion phenomena can take place, and experiment shows, adds the phenomenon that zinc powder can effectively be controlled the Steel Fibre corrosion in the brake raw material.
Mineral fibre, what mineral fibre was selected for use is sepiolite fibre, sepiolite fibre is a kind of big right mineral fibre, sepiolite fibre has good adsorptivity, wear resistance, thermostability and corrosion resistance, and sepiolite has good sound-absorbing effect, its acoustic absorptivity is 150 times of asbestos, can reduce the noise that brake block produces in braking process.
Frictional property regulator roughly can be divided into four classes according to different effects, and the first kind is that second class is to stablize friction factor for the raising friction factor, and the 3rd class is organic frictional property regulator, and the 4th class is the metallic dust modifier.Described frictional property regulator preferably includes graphite, vermiculite, zinc powder and molybdenum disulfide.
Graphite is the second class frictional property regulator, is a kind of solid lubricant, has very high intensity when high temperature, in brake block, add graphite, can stablize friction factor, in braking process, can form thin film on the brake block surface, thereby improve the wear resistance of brake block.Experiment shows that the amplitude that the friction factor of brake block increases along with the increase of graphite becomes very little when the content of graphite in the material of brake block surpasses 12%, though wear resistance increases to some extent, the wearing and tearing of antithesis is aggravated.The graphite that adds in the brake block is mixed by fineness 80 orders and 200 purpose graphite, should not surpass 12%.
Vermiculite belongs to first kind frictional property regulator, be a kind of Nantural non-toxic contain magnesium, aluminium, the secondary matter mineral of silicate, have that wear resistance is good, high temperature resistant, sound absorption qualities is good, and the dimensional stability of vermiculite is good, helps to keep the stable of brake block size.The fineness of vermiculite is the 60-80 order in the brake block.
Zinc powder belongs to the 4th class frictional property regulator, the purpose that adds zinc powder in the material of brake block is the corrosion stability for reinforcing material, frictional behaviour influence to brake block is not obvious, add zinc powder and can also improve the brake block noise to a certain extent, can reduce the density of brake pad material simultaneously.
Molybdenum disulfide is a kind of good solid lubricant, especially in heavy duty with at a high speed, and superior performance, the content of molybdenum disulfide increases, and the friction and wear performance of brake block has adverse influence, can increase the wearing and tearing to antithesis simultaneously.The price of molybdenum dioxide is higher, the too much cost that adds affiliation raising brake block.Based on above 2 considerations, the content of molybdenum dioxide should not surpass 2% in brake pad material.
The present invention also provides a kind of preparation method of brake pad of car, may further comprise the steps:
(1) the batching batch mixing is prepared burden furnish component in the described ratio of claim 5 in automatic batching system;
(2) one-shot forming technique is adopted in hot pressing, and equipment is four post press, and pressure set points is 200-400kg/cm2, and hot pressing temperature is 150-170 ℃, and hot pressing time is 7-8 minute;
(3) heat treatment, the brake block that hot pressing is good is delivered in the holding furnace and is heat-treated, and furnace temperature remains on 140-180 ℃, and holding time 12h cools off with furnace temperature then;
(4) with the brake block after the heat treatment, with cutter flash and the burr of periphery are handled, hole grinding inner arc, outer arc and chamfering, check according to technical requirements.
(5) the coding packing is carried out coding with the brake block that processes, and is packaged into the storehouse after the coding.
The brake pad of car of adding nanometer material provided by the invention has stable friction factor, and heat resistanceheat resistant decline property is strong, and wear rate is little, and vibrating noise is little, and good toughness is high temperature resistant, does not hinder advantages such as antithesis, is the ideal substitute of semi-metallic brake pad.
Embodiment
The invention provides a kind of brake pad of car, its furnish component comprises phenol-formaldehyde resin modified, modified butadiene acrylonitrile rubber, nano-calcium carbonate, carbon fiber, Steel Fibre, sepiolite fibre, graphite, vermiculite, zinc powder and molybdenum disulfide.
Phenol-formaldehyde resin modified is by nano-TiO
2Carry out modification and handle, adopt the original position method of formation, make generated in-situ TiO
2Particle has good dispersiveness and combination force in phenolic resin as matrix resin.
Modified butadiene acrylonitrile rubber is by adding nanometer SiO
2Carry out modification, make nanometer SiO by mechanical agitation
2Mix with nitrile butadiene rubber.Nanometer SiO
2Through the modification of coupling agent surface coverage, described coupling agent is titanate esters before using, and concrete steps are:
(1) with nanometer SiO
2Under 300 ℃ temperature, dry 3h;
(2) dilute titanate esters with anhydrous alcohol, its consumption is nanometer SiO
28% of quality;
(3) titanate esters after will diluting adds and fills nanometer SiO
2Container in, adopt ultrasound to disperse, guarantee that titanate coupling agent sticks to nanometer SiO uniformly
2The surface;
(4) the ultrasonic dispersion of process 1.5h is with nanometer SiO
2Leach, clean with anhydrous alcohol, put into the baking box oven dry, drying time is 2h, obtains the nanometer SiO of modification
2
The modification processing procedure of nano-calcium carbonate is:
(1) take by weighing an amount of nano-calcium carbonate and be dissolved in a certain amount of anhydrous alcohol, ultrasound disperses 1.5h;
(2) take by weighing a certain amount of acrylic acid and be dissolved in the distilled water, acrylic acid consumption is 9% of nano-calcium carbonate quality, and ultrasound disperses 20min;
(3) in the nano-calcium carbonate after disperseing to ultrasound, slowly (in 10 minutes) drip scattered acrylic acid aqueous solution, and add a spot of ammoniacal liquor, and the pH value of regulator solution is under 70 ℃ condition, with 120 rev/mins speed stirring 4h;
(4) be cooled to room temperature, suction filtration;
(5) clean the nano-calcium carbonate that firm suction filtration goes out repeatedly with deionized water, then, put into the thermoelectric oven oven dry;
(6) add anhydrous alcohol, methyl methacrylate monomer and azodiisobutyronitrile initator in the nano-calcium carbonate after oven dry, the consumption of methyl methacrylate monomer is 5% of nano-calcium carbonate quality, ammoniacal liquor regulator solution pH value continues prepolymerization 10h under the stirring at 80 ℃;
(7) suction filtration repeatedly after the flushing, is dried in baking oven, obtains the nano-calcium carbonate of modification.
The mass content of described graphite is no more than 12%, is mixed by fineness 80 orders and 200 purpose graphite, and the fineness of described vermiculite is the 60-80 order, and the mass content of described molybdenum dioxide is no more than 2%.
Embodiment 1
Prescription 1:
Use the technological process of prescription 1:
Batching, batch mixing are prepared burden material according to the ratio of prescription in automatic batching system, select the full-automatic burdening calculation machine control system of friction material (brake block) for use, and this system can realize feeding in raw material automatically, metering, discharge, batch mixing;
Hot pressing, what the present invention adopted is one-shot forming technique, and equipment is four post press, and pressure set points is 400kg/cm2, and hot pressing temperature is 150 ℃, hot pressing time is 7 minutes;
Heat treatment, the brake block that hot pressing is good is delivered in the holding furnace and is heat-treated, and furnace temperature remains on 170 ℃, and holding time 12h cools off with furnace temperature then;
With the brake block after the heat treatment, with cutter flash and the burr of periphery are handled, hole grinding inner arc, outer arc and chamfering, check according to technical requirements.
The coding packing is carried out coding with the brake block that processes, and is packaged into the storehouse after the coding.
Embodiment 2
Prescription 2:
| Sequence number | Title | Ratio |
| 1 | Phenol-formaldehyde resin modified | 10％ |
| 2 | Modified butadiene acrylonitrile rubber | 2％ |
| 3 | Carbon fiber | 18％ |
| 4 | Steel Fibre | 15％ |
| 5 | Mineral fibre | 15％ |
| 6 | Graphite | 12％ |
| 7 | Nano-calcium carbonate | 10％ |
| 8 | Vermiculite | 12％ |
| 9 | Zinc powder | 4％ |
| 10 | Molybdenum disulfide | 2％ |
Use the technological process of prescription 2:
Batching, batch mixing are prepared burden material according to the ratio of prescription in automatic batching system, select the full-automatic burdening calculation machine control system of friction material (brake block) for use, and this system can realize feeding in raw material automatically, metering, discharge, batch mixing;
Hot pressing, what the present invention adopted is one-shot forming technique, and equipment is four post press, and pressure set points is 300kg/cm2, and hot pressing temperature is 160 ℃, hot pressing time is 8 minutes;
Heat treatment, the brake block that hot pressing is good is delivered in the holding furnace and is heat-treated, and furnace temperature remains on 160 ℃, and holding time 12h cools off with furnace temperature then;
With the brake block after the heat treatment, with cutter flash and the burr of periphery are handled, hole grinding inner arc, outer arc and chamfering, check according to technical requirements.
The coding packing is carried out coding with the brake block that processes, and is packaged into the storehouse after the coding.
Claims (10)
1. a brake pad of car is characterized in that, the furnish component of described brake block comprises phenol-formaldehyde resin modified, modified butadiene acrylonitrile rubber, and nano-calcium carbonate, reinforcing fiber and frictional property regulator, wherein,
Phenol-formaldehyde resin modified is by nano-TiO
2Carry out modification and handle, adopt the original position method of formation, make generated in-situ TiO
2Particle has good dispersiveness and combination force in phenolic resin as matrix resin;
Modified butadiene acrylonitrile rubber is by adding nanometer SiO
2Carry out modification, make nanometer SiO by mechanical agitation
2Mix with nitrile butadiene rubber;
Nano-calcium carbonate adopts acrylic acid, and anhydrous alcohol, methyl methacrylate monomer and azodiisobutyronitrile initator carry out modification to be handled.
2. brake pad of car as claimed in claim 1 is characterized in that, described nanometer SiO
2Pass through the modification of coupling agent surface coverage before use, described coupling agent is titanate esters, and concrete steps are:
(1) with nanometer SiO
2Under 300 ℃ temperature, dry 3h;
(2) dilute titanate esters with anhydrous alcohol, its consumption is nanometer SiO
28% of quality;
(3) titanate esters after will diluting adds and fills nanometer SiO
2Container in, adopt ultrasound to disperse, guarantee that titanate coupling agent sticks to nanometer SiO uniformly
2The surface;
(4) the ultrasonic dispersion of process 1.5h is with nanometer SiO
2Leach, clean with anhydrous alcohol, put into the baking box oven dry, drying time is 2h, obtains the nanometer SiO of modification
2
3. brake pad of car as claimed in claim 1 is characterized in that, the modification processing procedure of nano-calcium carbonate is:
(1) take by weighing an amount of nano-calcium carbonate and be dissolved in a certain amount of anhydrous alcohol, ultrasound disperses 1.5h;
(2) take by weighing a certain amount of acrylic acid and be dissolved in the distilled water, ultrasound disperses 20min;
(3) in the nano-calcium carbonate after disperseing to ultrasound, slowly drip scattered acrylic acid aqueous solution, and add a spot of ammoniacal liquor, the pH value of regulator solution is under 70 ℃ condition, with 120 rev/mins speed stirring 4h;
(4) be cooled to room temperature, suction filtration;
(5) clean the nano-calcium carbonate that firm suction filtration goes out repeatedly with deionized water, then, put into the thermoelectric oven oven dry;
(6) add anhydrous alcohol, methyl methacrylate monomer and azodiisobutyronitrile initator in the nano-calcium carbonate after oven dry, ammoniacal liquor regulator solution pH value continues prepolymerization 10h under the stirring at 80 ℃;
(7) suction filtration repeatedly after the flushing, is dried in baking oven, obtains the nano-calcium carbonate of modification.
4. brake pad of car as claimed in claim 3 is characterized in that, in the described step (2), acrylic acid consumption is 9% of nano-calcium carbonate quality; In the described step (3), drip scattered acrylic acid aqueous solution in 10 minutes; In the described step (6), the consumption of methyl methacrylate monomer is 5% of nano-calcium carbonate quality.
5. as the arbitrary described brake pad of car of claim 1-4, it is characterized in that the mass percent of the furnish component of described brake block is:
Phenol-formaldehyde resin modified: 10-14%,
Modified butadiene acrylonitrile rubber: 2%,
Nano-calcium carbonate: 10%,
Reinforcing fiber: 48-49% and
Frictional property regulator 25-30%.
6. brake pad of car as claimed in claim 5 is characterized in that, described reinforcing fiber comprises carbon fiber, Steel Fibre and sepiolite fibre.
7. brake pad of car as claimed in claim 5 is characterized in that, described frictional property regulator comprises graphite, vermiculite, zinc powder and molybdenum disulfide.
8. brake pad of car as claimed in claim 7 is characterized in that, the mass content of described graphite is no more than 12%, and the mass content of described molybdenum disulfide is no more than 2%.
9. brake pad of car as claimed in claim 7 is characterized in that, described graphite is mixed by fineness 80 orders and 200 purpose graphite, and the fineness of described vermiculite is the 60-80 order.
10. as the preparation method of the arbitrary described brake pad of car of claim 1-9, may further comprise the steps:
(1) the batching batch mixing is prepared burden furnish component in the described ratio of claim 5 in automatic batching system;
(2) one-shot forming technique is adopted in hot pressing, and equipment is four post press, and pressure set points is 200-400kg/cm
2, hot pressing temperature is 150-170 ℃, hot pressing time is 7-8 minute;
(3) heat treatment, the brake block that hot pressing is good is delivered in the holding furnace and is heat-treated, and furnace temperature remains on 140-180 ℃, and holding time 12h cools off with furnace temperature then;
(4) with the brake block after the heat treatment, with cutter flash and the burr of periphery are handled, hole grinding inner arc, outer arc and chamfering, check according to technical requirements;
(5) the coding packing is carried out coding with the brake block that processes, and is packaged into the storehouse after the coding.
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|---|---|---|---|
| CN 201110216465 CN102330763B (en) | 2011-07-22 | 2011-07-22 | Nano-material-added car brake block and method for manufacturing same |
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|---|---|---|---|
| CN 201110216465 CN102330763B (en) | 2011-07-22 | 2011-07-22 | Nano-material-added car brake block and method for manufacturing same |
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| CN106009495A (en) * | 2016-06-03 | 2016-10-12 | 宁国飞鹰汽车零部件股份有限公司 | Brake pad made of composite material |
| CN106084631A (en) * | 2016-06-03 | 2016-11-09 | 宁国飞鹰汽车零部件股份有限公司 | A kind of high temperature resistant heavy-duty car brake block |
| CN105949707A (en) * | 2016-06-03 | 2016-09-21 | 宁国飞鹰汽车零部件股份有限公司 | Combined type brake pad |
| CN108223634B (en) * | 2017-12-12 | 2020-07-31 | 台州雪华制冷设备有限公司 | Composite brake shoe |
| CN109704638B (en) * | 2018-12-25 | 2021-03-26 | 桐庐宇鑫汽配有限公司 | Brake lining for automobile |
| CN112032229A (en) * | 2020-09-14 | 2020-12-04 | 来安县隆华摩擦材料有限公司 | High-temperature-resistant nano calcium carbonate automobile clutch friction plate and production method thereof |
| CN113339431A (en) * | 2021-07-12 | 2021-09-03 | 南京科技职业学院 | Noise-reducing friction material and preparation method thereof |
| CN114044948A (en) * | 2021-11-30 | 2022-02-15 | 天宜上佳（天津）新材料有限公司 | Dual-protection composition, wear-resistant material, brake drum type sheet and preparation method |
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| DE102006003907A1 (en) * | 2006-01-27 | 2007-08-02 | Schaeffler Kg | Lining used as a friction or brake lining comprises a base material and a nanomaterial selected according to the desired wear, friction and/or adhesive properties of the lining |
| CN101085854A (en) * | 2007-04-28 | 2007-12-12 | 武汉海宝龙复合材料有限责任公司 | Preparation method for inorganic nano material modified phenolic resins |
| DE102009023402A1 (en) * | 2009-05-29 | 2010-12-02 | Esk Ceramics Gmbh & Co. Kg | Suspension for the production of a friction-increasing layer, shaped article with such a friction-increasing layer, process for its preparation and its use |
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| CN102330763A (en) | 2012-01-25 |
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