CN109707773A - A kind of low noise high temperature resistant drum type friction piece and preparation method thereof by the production of three layered materials - Google Patents
A kind of low noise high temperature resistant drum type friction piece and preparation method thereof by the production of three layered materials Download PDFInfo
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Abstract
The present invention relates to a kind of low noise high temperature resistant drum type friction pieces and preparation method thereof by the production of three layered materials.The drum type friction piece includes precoat, buffer layer and initial bed；The material of the buffer layer includes 3-5 parts of phenolic resin, 70-80 parts of noise reduction particle, 5-10 parts of flaxen fiber and 5-10 parts of nitrile rubber by weight；The noise reduction particle includes: 10-20 parts of solid-state butadiene-styrene rubber, 5-10 parts of liquid phenolic resin, 10-20 parts of coke blacking, 20-40 parts of phenolic resin modified trees powder, 10-20 parts of vermiculite, 5-10 parts of mineral fibres and 0.2-0.4 parts of vulcanizing system by weight.A kind of method that the present invention provides solution brake noise effectively absorbs vibrational energy by the use of intermediate buffer layer, reduces the driving source of system.Meanwhile rubber and the higher coke blacking of voidage, the modified trees powder and being used in mixed way for vermiculite in buffer layer noise reduction particle of the invention make product have lower hardness and higher compression ratio, and intermediate buffer layer is made to have good sound-deadening and noise-reducing effect.
Description
Technical field
The present invention relates to friction materials technology fields, and in particular to a kind of low noise high temperature resistant drum-type produced by three layered materials
Friction plate and preparation method thereof.
Background technique
A key safety components of the friction plate as brake system of car, currently, industry is solving braking safety
On had mature technical solution, but the method in terms of solving brake noise and heat-resisting quantity is few, common drum type friction
Phenolic resin or phenol-formaldehyde resin modified are used in slice prescription, since the initial decomposition temperature of phenolic resin is at 300 DEG C -350 DEG C, certainly
Determine friction plate to begin to decompose when being higher than 350 DEG C, braking ability decline, abrasion is accelerated, and exists in higher temperature certain
Security risk, as the speed of operation lorry is getting faster, according to energy transformation rule, the temperature of vehicle operation is also increasingly
Height, traditional drum type friction piece have been unable to meet requirement.
Brake noise is a system problem, and the mechanism occurred has certain randomness and complexity, with terminal
Client is higher and higher to the pursuit of comfort level, and the requirement to brake noise is higher and higher, single in terms of Properties of Friction Materials at present
Improve the ineffective of brake noise, but drum type friction piece can be bonded noise reduction since structure is limited unlike disk type brake disc
Piece achievees the effect that damping.
Therefore a kind of formula and its technique is needed to solve heat-resisting quantity and brake noise issues to integrate.
Summary of the invention
The present invention provides a kind of low noise high temperature resistant drum type friction piece produced by three layered materials to solve above-mentioned technical problem
And preparation method thereof.The drum type friction piece has good sound-deadening and noise-reducing effect.
In order to solve the above technical problems, the technical solution used in the present invention is as follows:
A kind of low noise high temperature resistant drum type friction piece produced by three layered materials, the drum type friction piece include precoat, subtract
Shake layer and initial bed；The material of the buffer layer includes 3-5 parts of phenolic resin, 70-80 parts of noise reduction particle, flaxen fiber by weight
5-10 parts and 5-10 parts of nitrile rubber；The noise reduction particle includes: 10-20 parts of solid-state butadiene-styrene rubber, liquid phenolic aldehyde by weight
5-10 parts of resin, 10-20 parts of coke blacking, 20-40 parts of phenolic resin modified trees powder, 10-20 parts of vermiculite, 5-10 parts of mineral fibres
And 0.2-0.4 parts of vulcanizing system.
In above scheme, the vulcanizing system includes Sulfur, NOBS promotor and zinc oxide, and the sulphur, NOBS promote
The mass ratio of agent and zinc oxide three are 2:1:1.
In above scheme, the material of the precoat includes 8-12 parts of polyimide resin, polyacrylonitrile fibre by weight
Dimension 2-6 parts, 1-3 parts of aramid fiber, 5-10 parts of Black Warrior mineral fibres, 10-15 parts of potassium titanate crystal whisker, 10-15 parts of calcium sulfate crystal whiskers,
Calcirm-fluoride 5-10,2-6 parts of calcium hydroxide, 1-3 parts of aluminium oxide, 0.5-1 parts of methenamine, zirconium English powder 1-3, synthetic graphite 10-15
Part, 5-10 parts of molybdenum disulfide and 15-20 parts of precipitated calcium carbonate.
In above scheme, the decomposition temperature of the polyimide resin is at 400 DEG C or more, the length of the polyacrylonitrile fibre
Degree is 3-5mm.
In above scheme, the material of the initial bed include by weight 8-12 parts of phenolic resin, 3-5 parts of nitrile rubber,
5-18 parts of mineral fibres, 25-35 parts of steel fibre, 15-25 parts of barium sulfate and 15-20 parts of calcium carbonate.
In above scheme, the phenolic resin modified trees powder be by by common trees powder at a temperature of 60-90 DEG C
2-5 hour is handled, then puts into trees powder in batch mixer, by liquid phenolic resin by high-pressure spray gun channel, with 300-
In the speed sprinkling batch mixer of 500ml/min, spray 5-8 minutes to obtain the final product.
In above scheme, the noise reduction particle the preparation method comprises the following steps: by the solid-state butadiene-styrene rubber and liquefied phenol of predetermined ratio
Urea formaldehyde direct plunges into mixing storehouse, at 0.6-1.0MPa mixing 1-3 minutes to after uniformly separating, then put into coke blacking, phenol
Urea formaldehyde is modified trees powder, vermiculite, mineral fibres and vulcanizing system, is passed through cooling water temperature control at 80-110 DEG C, in 0.6-
It is mixing 8-12 minutes under 1.0MPa, the good material disintegrating of mixing is uniform.
In above scheme, the partial size of the phenolic resin modified trees powder is 50-100 mesh, and the partial size of coke blacking is 50-
100 mesh, the partial size of vermiculite are 30-80 mesh.
The preparation method of the low noise high temperature resistant drum type friction piece by the production of three layered materials, comprising the following steps:
1) the initial bed premix that will be mixed, buffer layer premix, precoat premix is according to weight ratio 1-2:1-2:
2-4 successively puts into hot pressing die, carries out hot-forming, the parameter of hot pressing are as follows: pressure 15MPa-20MPa, temperature 180
DEG C -200 DEG C, curing time 6min-12min；
2) semi-finished product after coming out hot pressing are put into heat-treatment furnace and are heat-treated, wherein heat treatment temperature be 100 DEG C-
200 DEG C, the time is -16 hours 8 hours；
3) semi-finished product being heat-treated are subjected to grinding into finished product according to drawing.
In above scheme, the mass ratio of initial bed premix, buffer layer premix, precoat premix three is 1.5:1:
3。
In above scheme, the polyimide resin is decomposition temperature at 400 DEG C or more, the length of the polyacrylonitrile fibre
Degree is 3-5mm, and the length of the mineral fibres in the noise reduction particle is 1-3mm, and the length of flaxen fiber is 1-3mm, the oxidation
Aluminium particle size is greater than 300 mesh, and the granularity of barium sulfate is greater than 120 mesh, and the granularity of calcium hydroxide is greater than 100 mesh, the granularity of calcium carbonate
100-200 mesh, the partial size of calcirm-fluoride are 100-200 mesh.
The invention has the benefit that
1) a kind of method for providing solution brake noise effectively absorbs vibrational energy by the use of intermediate buffer layer,
The driving source of reduction system.
2) due to the use of polyimide resin in precoat of the invention, make its higher temperature tolerance, product is in high temperature
In the case of have higher service life and safer braking ability.
3) rubber in buffer layer noise reduction particle of the invention and the higher coke blacking of voidage, modified trees powder and vermiculite
Be used in mixed way and make product that there is lower hardness and higher compression ratio, so that intermediate buffer layer is had good sound-deadening and noise-reducing effect
Fruit.
4) the noise reduction particle in buffer layer of the invention also functions as the bridge of connection precoat and bottom material simultaneously, makes three kinds to match
Cube system can be effectively combined together, guarantee that entire product has preferable mechanical property.
Detailed description of the invention
Fig. 1 is the schematic perspective view of drum type friction piece of the present invention.
Fig. 2 is the schematic diagram of the cross section of drum type friction piece of the present invention.
Specific embodiment
For a better understanding of the present invention, the content that the present invention is furture elucidated with reference to the accompanying drawings and examples, but this
The content of invention is not limited solely to the following examples.
Embodiment 1
It as depicted in figs. 1 and 2, is a kind of low noise high temperature resistant drum type friction produced by three layered materials provided by the invention
Piece, the drum type friction piece include precoat 3, buffer layer 2 and initial bed 1, on the precoat 3, buffer layer 2 and initial bed 1
Equipped with the corresponding through-hole 4 in position, bolt passes through the through-hole 4 and drum type friction piece is fixed.
The low noise high temperature resistant drum type friction piece can be prepared by the following method:
1) the initial bed premix that will be mixed, buffer layer premix, precoat premix according to weight ratio 1.5:1:3 according to
It is secondary to put into hot pressing die, under the pressure of 16MPa, solidify 8 minutes at a temperature of 200 DEG C；
2) semi-finished product after coming out hot pressing are put into heat-treatment furnace and are heat-treated, and wherein heat treatment temperature is 180 DEG C, when
Between be 10 hours；
3) semi-finished product being heat-treated are subjected to grinding into finished product according to drawing.
In the present embodiment, the material of the friction material precoat includes: 12 parts of polyimide resin by weight, is gathered
2 parts of Dralon, 2 parts of aramid fiber, 8 parts of Black Warrior mineral fibres, 15 parts of potassium titanate crystal whisker, 10 parts of calcium sulfate crystal whiskers, fluorination
5 parts of calcium, 6 parts of calcium hydroxide, 1 part of aluminium oxide, 0.5 part of methenamine, 3 parts of zirconium English powder, 10 parts of synthetic graphite, 8 parts of molybdenum disulfide,
20 parts of precipitated calcium carbonate.
The material of the buffer layer includes: 6 parts of phenolic resin by weight, and 78 parts of noise reduction particle, 10 parts of flaxen fiber, butyronitrile
6 parts of rubber.
Wherein: noise reduction particle includes: 115 parts of solid-state butadiene-styrene rubber, 8 parts of liquid phenolic resin, coke blacking 16 by weight
Part, 30 parts of phenolic resin modified trees powder, 15 parts of vermiculite, 8 parts of mineral fibres and 0.3 part of vulcanizing system.Vulcanizing system includes sulphur
Yellow, NOBS promotor and zinc oxide, the mass ratio of the sulphur, NOBS promotor and zinc oxide three are 2:1:1.The phenolic aldehyde
The partial size of resin modified trees powder is 50-100 mesh, and the partial size of coke blacking is 50-100 mesh, and the partial size of vermiculite is 30-80 mesh.
In the present embodiment, the phenolic resin modified trees powder be by by common trees powder in 60-90 DEG C of temperature
Then lower 2-5 hour of processing will put into trees powder in batch mixer, liquid phenolic resin is passed through high-pressure spray gun channel, with
In the speed sprinkling batch mixer of 300-500ml/min, spray 5-8 minutes to obtain the final product.
In the present embodiment, noise reduction particle the preparation method comprises the following steps: by the solid-state butadiene-styrene rubber and liquid phenolic aldehyde of predetermined ratio
Resin direct plunges into mixing storehouse, at 0.6-1.0MPa mixing 1-3 minutes to after uniformly separating, then put into coke blacking, phenolic aldehyde
Resin modified trees powder, vermiculite, mineral fibres and vulcanizing system are passed through cooling water temperature control at 80-110 DEG C, in 0.6-
It is mixing 8-12 minutes under 1.0MPa, the good material disintegrating of mixing is uniform.
The material of the initial bed includes: 10 parts of phenolic resin by weight, and 4 parts of nitrile rubber, 18 parts of mineral fibres, steel
32 parts of fiber, 20 parts of barium sulfate, 16 parts of of calcium carbonate
The friction plate precoat under the present embodiment is detected with excellent high temperature friction and wear characteristic, buffer layer have compared with
Low hardness and higher compression ratio, entire friction plate are excellent in terms of brake noise.
Precoat frictional behaviour (GB5763-2008)
Rockwell hardness (GB/T5766-2007): HRL90.
Compression ratio (GB/T22310-2008): room temperature: 0.5%, 200 DEG C: 1.2%.
The physical property of buffer layer
Rockwell hardness (GB/T5766-2007): HRL32.
Compression ratio (GB/T22310-2008): room temperature 1.5%, 200 DEG C 3.5%.
Friction disc brake noise performance
By the formula finished product in inertia bench brake noise performance (QC/T239-2015).
Noise: 70dB.400HZ.
Embodiment 2
The low noise high temperature resistant drum type friction piece can be prepared by the following method:
1) the initial bed premix that will be mixed, buffer layer premix, precoat premix according to weight ratio 1.5:1:3 according to
It is secondary to put into hot pressing die, under the pressure of 18MPa, solidify 10 minutes at a temperature of 200 DEG C；
2) semi-finished product after coming out hot pressing are put into heat-treatment furnace and are heat-treated, and wherein heat treatment temperature is 180 DEG C, when
Between be 10 hours；
3) semi-finished product being heat-treated are subjected to grinding into finished product according to drawing.
In the present embodiment, the material of the friction material precoat includes: 10 parts of polyimide resin by weight, is gathered
4 parts of Dralon, 2 parts of aramid fiber, 8 parts of Black Warrior mineral fibres, 15 parts of potassium titanate crystal whisker, 10 parts of calcium sulfate crystal whiskers, fluorination
5 parts of calcium, 6 parts of calcium hydroxide, 1 part of aluminium oxide, 0.5 part of methenamine, 3 parts of zirconium English powder, 10 parts of synthetic graphite, 5 parts of molybdenum disulfide,
20 parts of precipitated calcium carbonate.
The material of the buffer layer includes: 5 parts of phenolic resin by weight, and 80 parts of noise reduction particle, 5 parts of flaxen fiber, butyronitrile
10 parts of rubber.
Wherein: noise reduction particle includes: 115 parts of solid-state butadiene-styrene rubber, 8 parts of liquid phenolic resin, coke blacking 16 by weight
Part, 30 parts of phenolic resin modified trees powder, 15 parts of vermiculite, 8 parts of mineral fibres and 0.3 part of vulcanizing system.Vulcanizing system includes sulphur
Yellow, NOBS promotor and zinc oxide, the mass ratio of the sulphur, NOBS promotor and zinc oxide three are 2:1:1.The phenolic aldehyde
The partial size of resin modified trees powder is 50-100 mesh, and the partial size of coke blacking is 50-100 mesh, and the partial size of vermiculite is 30-80 mesh.
In the present embodiment, the phenolic resin modified trees powder be by by common trees powder in 60-90 DEG C of temperature
Then lower 2-5 hour of processing will put into trees powder in batch mixer, liquid phenolic resin is passed through high-pressure spray gun channel, with
In the speed sprinkling batch mixer of 300-500ml/min, spray 5-8 minutes to obtain the final product.
In the present embodiment, noise reduction particle the preparation method comprises the following steps: by the solid-state butadiene-styrene rubber and liquid phenolic aldehyde of predetermined ratio
Resin direct plunges into mixing storehouse, at 0.6-1.0MPa mixing 1-3 minutes to after uniformly separating, then put into coke blacking, phenolic aldehyde
Resin modified trees powder, vermiculite, mineral fibres and vulcanizing system are passed through cooling water temperature control at 80-110 DEG C, in 0.6-
It is mixing 8-12 minutes under 1.0MPa, the good material disintegrating of mixing is uniform.
The material of the initial bed includes: 8 parts of phenolic resin by weight, and 3 parts of nitrile rubber, 10 parts of mineral fibres, steel
35 parts of fiber, 25 parts of barium sulfate, 20 parts of calcium carbonate.
The friction plate precoat under the present embodiment is detected with excellent high temperature friction and wear characteristic, buffer layer have compared with
Low hardness and higher compression ratio, entire friction plate are excellent in terms of brake noise.
Precoat frictional behaviour (GB5763-2008)
Rockwell hardness (GB/T5766-2007): HRL92.
Compression ratio (GB/T22310-2008): room temperature: 0.6%, 200 DEG C: 1.1%.
The physical property of buffer layer
Rockwell hardness (GB/T5766-2007): HRL30.
Compression ratio (GB/T22310-2008): room temperature 1.7%, 200 DEG C 3.2%.
Friction disc brake noise performance
By the formula finished product in inertia bench brake noise performance (QC/T239-2015)
Noise: 65dB.420HZ.
Comparative example 1
The low noise high temperature resistant drum type friction piece can be prepared by the following method:
1) friction material precoat premix is placed in thermoset mold, under the pressure of 16MPa, 200 DEG C of temperature
Lower solidification 8 minutes, curing process 10 hours after 180 DEG C of temperature, using obtaining finished product after grinding.
In this comparative example, the material of the friction material precoat includes: 12 parts of polyimide resin by weight, is gathered
2 parts of Dralon, 2 parts of aramid fiber, 8 parts of Black Warrior mineral fibres, 15 parts of potassium titanate crystal whisker, 10 parts of calcium sulfate crystal whiskers, fluorination
5 parts of calcium, 6 parts of calcium hydroxide, 1 part of aluminium oxide, 0.5 part of methenamine, 3 parts of zirconium English powder, 10 parts of synthetic graphite, 8 parts of molybdenum disulfide,
20 parts of precipitated calcium carbonate.
It is detected friction plate all to be prepared by facestock material, although having and similar friction and abrasion in embodiment 1
Can, but performance has very big difference in terms of brake noise.
Precoat frictional behaviour (GB5763-2008)
Rockwell hardness (GB/T5766-2007): HRL93.
Compression ratio (GB/T22310-2008): room temperature: 0.7%, 200 DEG C: 1.0%.
Friction disc brake noise performance
By the formula finished product in inertia bench brake noise performance (QC/T239-2015)
Noise: 92dB.1100HZ.
Comparative example 2
The low noise high temperature resistant drum type friction piece can be prepared by the following method:
1) the initial bed premix mixed and precoat premix are sequentially placed into heat cure mould according to weight ratio 1.5:3
In tool, under the pressure of 18MPa, solidify 10 minutes at a temperature of 200 DEG C, curing process 10 hours after 180 DEG C of temperature,
Using obtaining finished product after grinding.
In this comparative example, the material of the friction material precoat includes: 10 parts of polyimide resin by weight, is gathered
4 parts of Dralon, 2 parts of aramid fiber, 8 parts of Black Warrior mineral fibres, 15 parts of potassium titanate crystal whisker, 10 parts of calcium sulfate crystal whiskers, fluorination
Calcium 5,6 parts of calcium hydroxide, 1 part of aluminium oxide, 0.5 part of methenamine, 3 parts of zirconium English powder, 10 parts of synthetic graphite, 5 parts of molybdenum disulfide, gently
20 parts of matter calcium carbonate.
The material of the initial bed includes: 8 parts of phenolic resin by weight, and 3 parts of nitrile rubber, 10 parts of mineral fibres, steel
35 parts of fiber, 25 parts of barium sulfate, 20 parts of calcium carbonate.
Although detected the friction plate under this comparative example have and embodiment 2 in similar friction and wear behavior,
Performance has very big difference in terms of brake noise.
Precoat frictional behaviour (GB5763-2008)
Rockwell hardness (GB/T5766-2007): HRL92.
Compression ratio (GB/T22310-2008): room temperature: 0.6%, 200 DEG C: 1.1%.
Friction disc brake noise performance:
By the formula finished product in inertia bench brake noise performance (QC/T239-2015)
Noise: 88dB.1200HZ.
Comparative example 3
The comparative example is roughly the same with embodiment 1, unlike, which uses unmodified common tree
Wood powder.The results show that by the brake noise performance (QC/T239-2015) of the finished product:
Noise: 85dB.800HZ.
Comparative example 4
The comparative example is roughly the same with embodiment 1, unlike, there is no coke blacking in the formula of noise reduction particle, meanwhile, leech
Stone is 31 parts.
The physical property of buffer layer
Rockwell hardness (GB/T5766-2007): HRL50.
Compression ratio (GB/T22310-2008): room temperature 1.0%, 200 DEG C 2.2%.
Friction disc brake noise performance
By the formula finished product in inertia bench brake noise performance (QC/T239-2015)
Noise: 82dB.750HZ.
Comparative example 5
The comparative example is roughly the same with embodiment 1, unlike, there is no vermiculite in the formula of noise reduction particle, meanwhile, coke
Powder is 31 parts.
The physical property of buffer layer
Rockwell hardness (GB/T5766-2007): HRL57.
Compression ratio (GB/T22310-2008): room temperature 1.1%, 200 DEG C 2.0%.
Friction disc brake noise performance
By the formula finished product in inertia bench brake noise performance (QC/T239-2015)
Noise: 86dB.770HZ.
From comparative example 4 and comparative example 5 as can be seen that the present invention uses phenolic resin modified trees powder, coke blacking and vermiculite
Three's is used cooperatively, and can significantly improve the compressibility of the product and have excellent performance in terms of noise.
Claims (10)
1. a kind of low noise high temperature resistant drum type friction piece produced by three layered materials, which is characterized in that the drum type friction piece includes
Precoat, buffer layer and initial bed；The material of the buffer layer includes 3-5 parts of phenolic resin, noise reduction particle 70-80 by weight
Part, 5-10 parts of flaxen fiber and 5-10 parts of nitrile rubber；The noise reduction particle include: by weight 10-20 parts of solid-state butadiene-styrene rubber,
5-10 parts of liquid phenolic resin, 10-20 parts of coke blacking, 20-40 parts of phenolic resin modified trees powder, 10-20 parts of vermiculite, mineral are fine
5-10 parts and 0.2-0.4 parts of vulcanizing system of dimension.
2. the low noise high temperature resistant drum type friction piece produced as described in claim 1 by three layered materials, which is characterized in that the sulphur
Change system includes Sulfur, NOBS promotor and zinc oxide, and the mass ratio of the sulphur, NOBS promotor and zinc oxide three is 2:
1:1。
3. the low noise high temperature resistant drum type friction piece produced as described in claim 1 by three layered materials, which is characterized in that the face
The material of the bed of material includes 8-12 parts of polyimide resin, 2-6 parts of polyacrylonitrile fibre, 1-3 parts of aramid fiber, the Black Warrior by weight
5-10 parts of mineral fibres, 10-15 parts of potassium titanate crystal whisker, 10-15 parts of calcium sulfate crystal whiskers, calcirm-fluoride 5-10,2-6 parts of calcium hydroxide,
1-3 parts of aluminium oxide, 0.5-1 parts of methenamine, zirconium English powder 1-3,10-15 parts of synthetic graphite, 5-10 parts of molybdenum disulfide and lightweight carbon
Sour calcium 15-20 parts.
4. the low noise high temperature resistant drum type friction piece produced as claimed in claim 3 by three layered materials, which is characterized in that described poly-
For the decomposition temperature of imide resin at 400 DEG C or more, the length of the polyacrylonitrile fibre is 3-5mm.
5. the low noise high temperature resistant drum type friction piece produced as described in claim 1 by three layered materials, which is characterized in that the bottom
The material of the bed of material includes 8-12 parts of phenolic resin, 3-5 parts of nitrile rubber, 5-18 parts of mineral fibres, steel fibre 25-35 by weight
Part, 15-25 parts of barium sulfate and 15-20 parts of calcium carbonate.
6. the low noise high temperature resistant drum type friction piece produced as described in claim 1 by three layered materials, which is characterized in that the phenol
The modified trees powder of urea formaldehyde is by the way that common trees powder is handled 2-5 hour at a temperature of 60-90 DEG C, then by trees powder
It puts into batch mixer, by liquid phenolic resin by high-pressure spray gun channel, batch mixer is sprayed with the speed of 300-500ml/min
In, spray 5-8 minutes to obtain the final product.
7. the low noise high temperature resistant drum type friction piece produced as described in claim 1 by three layered materials, which is characterized in that the drop
Make an uproar particle the preparation method comprises the following steps: by the solid-state butadiene-styrene rubber and liquid phenolic resin of predetermined ratio, direct plunge into mixing storehouse,
Under 0.6-1.0MPa mixing 1-3 minutes to after uniformly separating, then put into coke blacking, phenolic resin modified trees powder, vermiculite, mineral
Fiber and vulcanizing system are passed through cooling water temperature control at 80-110 DEG C, mixing 8-12 minutes at 0.6-1.0MPa, by mixing
Good material disintegrating is uniform.
8. the low noise high temperature resistant drum type friction piece produced as described in claim 1 by three layered materials, which is characterized in that the phenol
The partial size of the modified trees powder of urea formaldehyde is 50-100 mesh, and the partial size of coke blacking is 50-100 mesh, and the partial size of vermiculite is 30-80 mesh.
9. the preparation side of the low noise high temperature resistant drum type friction piece as claimed in any one of claims 1 to 8 by the production of three layered materials
Method, which comprises the following steps:
1) the initial bed premix that will be mixed, buffer layer premix, precoat premix according to weight ratio 1-2:1-2:2-4 according to
It is secondary to put into hot pressing die, carry out hot-forming, the parameter of hot pressing are as follows: 180 DEG C -200 of pressure 15MPa-20MPa, temperature
DEG C, curing time 6min-12min；
2) semi-finished product after coming out hot pressing are put into heat-treatment furnace and are heat-treated, and wherein heat treatment temperature is 100 DEG C -200 DEG C,
Time is -16 hours 8 hours；
3) semi-finished product being heat-treated are subjected to grinding into finished product according to drawing.
10. as described in claim 1 by the preparation method of the low noise high temperature resistant drum type friction piece of three layered materials production, feature
It is, initial bed premix, buffer layer premix, the mass ratio of precoat premix three is 1.5:1:3.
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| CN112377548A (en) * | 2020-11-16 | 2021-02-19 | 武汉理工大学 | Wear-resistant noise-reducing metal-based high-speed rail brake pad and preparation method thereof |
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| CN115234589A (en) * | 2022-06-02 | 2022-10-25 | 珠海格莱利摩擦材料股份有限公司 | Bionic friction material and preparation method and application thereof |
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| CN112377548A (en) * | 2020-11-16 | 2021-02-19 | 武汉理工大学 | Wear-resistant noise-reducing metal-based high-speed rail brake pad and preparation method thereof |
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| CN115234589B (en) * | 2022-06-02 | 2023-08-18 | 珠海格莱利摩擦材料股份有限公司 | Bionic friction material and preparation method and application thereof |
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