CN106402218B - The preparation method of polyacrylonitrile-radical short carbon fiber brake block - Google Patents
The preparation method of polyacrylonitrile-radical short carbon fiber brake block Download PDFInfo
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- CN106402218B CN106402218B CN201611007364.8A CN201611007364A CN106402218B CN 106402218 B CN106402218 B CN 106402218B CN 201611007364 A CN201611007364 A CN 201611007364A CN 106402218 B CN106402218 B CN 106402218B
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- polyacrylonitrile
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- brake block
- short carbon
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 31
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 31
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 36
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000007731 hot pressing Methods 0.000 claims abstract description 29
- 238000005245 sintering Methods 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910001629 magnesium chloride Inorganic materials 0.000 claims abstract description 18
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000005751 Copper oxide Substances 0.000 claims abstract description 10
- 229910000604 Ferrochrome Inorganic materials 0.000 claims abstract description 10
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- 229910000431 copper oxide Inorganic materials 0.000 claims abstract description 10
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 10
- 239000010439 graphite Substances 0.000 claims abstract description 10
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000007605 air drying Methods 0.000 claims abstract description 9
- 238000000748 compression moulding Methods 0.000 claims abstract description 9
- 239000011159 matrix material Substances 0.000 claims abstract description 9
- 238000010348 incorporation Methods 0.000 claims abstract description 8
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 5
- 238000004372 laser cladding Methods 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 19
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 12
- 229910052796 boron Inorganic materials 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 239000004408 titanium dioxide Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/023—Composite materials containing carbon and carbon fibres or fibres made of carbonizable material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0082—Production methods therefor
- F16D2200/0086—Moulding materials together by application of heat and pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention discloses a kind of preparation methods of polyacrylonitrile-radical short carbon fiber brake block, include the following steps, (1) polyacrylonitrile-radical short carbon fiber, high carbon ferro-chrome, ferrosilicon, silica, vanadium iron, graphite, boron powder are uniformly mixed in batch mixer, mixing temperature is 25~30 DEG C, and incorporation time is 60~80min；(2) by said mixture compression moulding, hot pressing, sintering are then carried out on hot press, is crushed；(3) copper oxide, magnesia and magnesium chloride is added, suitable quantity of water is added and mixes, brushes on the surface of steel matrix brake block, natural air drying 24~30h is dried in vacuo 1~2h under the conditions of 200~220 DEG C, utilizes CO2Laser carries out Laser Cladding Treatment, then is handled with ultrasonic wave.Hardness of the invention can be significantly improved using preparation method of the invention, extend the service life of brake block.
Description
Technical field
The present invention discloses one kind and belongs to automobile brake part field more particularly to polyacrylonitrile-radical short carbon fiber brake block
Preparation method.
Background technique
Brake block is also brake rubber block.In the brake system of automobile, brake block is the breaking piece of most critical, all brakes
The quality of effect is all that brake block plays a decisive role.Brake block is generally made of steel plate, bonding thermal insulation layer and friction block, steel plate
To carry out antirust by coating, coating process detects the Temperature Distribution of coating process with SMT-4 furnace temperature tracker to guarantee quality.
Wherein thermal insulation layer is made of adiabatic material, it is therefore an objective to heat-insulated.Friction block is made of friction material, adhesive, when brake
It is compressed on brake disc or brake rim and generates friction, to achieve the purpose that vehicle deceleration brakes.Due to rubbing action, friction
Block can gradually be worn, and the lower brake pad wear of cost in general must be faster.
Application No. is CN201510147030.X to disclose a kind of automotive brake pads, is related to technical field of automobile accessories, it
It is made of the raw material of following parts by weight: 15~25 parts of silicon nitride ceramic, 20~40 parts of silicon carbide fibre, ceramic bonding agent 5
~10 parts, 3~5 parts of phenolic resin, 5~10 parts of rubber powder, 5~10 parts of Frication powder, 20~30 parts of filler, nano silica 2
~5 parts, 5~8 parts of sintering aid, 1~3 part of defoaming agent.The invention has the following beneficial effects: main original compared with prior art
Expect silicon nitride ceramic and silicon carbide fibre is inorganic non-metallic material, intensity is high, and high temperature resistance is good, and heat fading is small, friction
Coefficient stabilization, but the invention is prone to wear.
Summary of the invention
The object of the present invention is to provide a kind of preparation methods of polyacrylonitrile-radical short carbon fiber brake block, and hardness is big, makes
It is long with the service life.
Technical solution is:
The preparation method of polyacrylonitrile-radical short carbon fiber brake block, includes the following steps,
(1) by polyacrylonitrile-radical short carbon fiber, high carbon ferro-chrome, ferrosilicon, silica, vanadium iron, graphite, boron powder in batch mixer
It is uniformly mixed, mixing temperature is 25~30 DEG C, and incorporation time is 60~80min；
(2) by said mixture compression moulding, hot pressing, sintering are then carried out on hot press, is crushed；
(3) copper oxide, magnesia and magnesium chloride is added, suitable quantity of water is added and mixes, brushes on the surface of steel matrix brake block,
Natural air drying 24~30h is dried in vacuo 1~2h under the conditions of 200~220 DEG C, utilizes CO2Laser carries out Laser Cladding Treatment,
It is handled again with ultrasonic wave.
Preferably, the average diameter of the polyacrylonitrile-radical short carbon fiber is 10~11 microns, average in step (1)
Length is 9 centimetres.
Preferably, in step (1), each raw material is by weight, 20~60 parts of polyacrylonitrile-radical short carbon fiber, high
10~30 parts of carbon ferrochrome, 40~80 parts of ferrosilicon, 60~100 parts of silica, 20~30 parts of vanadium iron, 10~20 parts of graphite, boron powder
20~30 parts.
Preferably, the additional amount of the magnesium chloride is the 1%~2% of boron silty amount.
Preferably, being sintered under protection of argon gas in step (2).
Preferably, in step (2), the technological parameter are as follows: pressing pressure 15MPa, pressing speed are 6 millis m/min
Clock, press temperature are 20 DEG C, pressing time 30s；Hot pressing pressure is 15MPa, and hot pressing temperature is 200 DEG C, hot pressing time 10
Minute；Sintering temperature is 1400 DEG C, and sintering time is 10 hours, sintering pressure 0.15MPa.
Preferably, in step (3), by weight, 10~13 parts of copper oxide, 4~8 parts of magnesia and magnesium chloride 3~6
Part.
Preferably, the additional amount of water is the 50~80% of magnesia quality in step (3).
Preferably, in step (3), the CO2Laser power is 3kW, scanning speed 8mm/s.
Preferably, the ultrasonic power is 1~2kW in step (3), frequency is 50~100kHz.
Hardness of the invention can be significantly improved using preparation method of the invention, extend the service life of brake block.
Specific embodiment
Embodiment 1
The preparation method of polyacrylonitrile-radical short carbon fiber brake block, includes the following steps,
(1) by weight, 40 parts of polyacrylonitrile-radical short carbon fiber, 20 parts of high carbon ferro-chrome, 60 parts of ferrosilicon, titanium dioxide are weighed
80 parts of silicon, 25 parts of vanadium iron, 15 parts of graphite, 25 parts of boron powder are put into batch mixer and are uniformly mixed, and mixing temperature is 27.5 DEG C, when mixing
Between be 70min；The average diameter of the polyacrylonitrile-radical short carbon fiber is 10.5 microns, and average length is 9 centimetres；
(2) by said mixture compression moulding, hot pressing is then carried out on hot press, is sintered under protection of argon gas,
It crushes；The technological parameter are as follows: pressing pressure 15MPa, pressing speed are 6 mm/mins, and press temperature is 20 DEG C, compacting
Time is 30s；Hot pressing pressure is 15MPa, and hot pressing temperature is 200 DEG C, and hot pressing time is 10 minutes；Sintering temperature is 1400 DEG C,
Sintering time is 10 hours, sintering pressure 0.15MPa.
(3) by weight, 11.5 parts of copper oxide of addition, 6 parts of magnesia and 4.5 parts of magnesium chloride, and the addition of magnesium chloride
Amount is the 1.5% of boron silty amount, and 75% water that magnesia quality is added mixes, and is brushed on the surface of steel matrix brake block, natural
27h is air-dried, is dried in vacuo 1.5h under the conditions of 210 DEG C, using power is 3kW, scanning speed 8mm/sCO2Laser is swashed
Light cladding processing, then with power be 1.5kW, frequency is that 75kHz ultrasonic wave is handled.
Embodiment 2
The preparation method of polyacrylonitrile-radical short carbon fiber brake block, includes the following steps,
(1) by weight, 20 parts of polyacrylonitrile-radical short carbon fiber, 10 parts of high carbon ferro-chrome, 40 parts of ferrosilicon, titanium dioxide are weighed
60 parts of silicon, 20 parts of vanadium iron, 10 parts of graphite, 20 parts of boron powder are put into batch mixer and are uniformly mixed, and mixing temperature is 25 DEG C, incorporation time
For 60min；The average diameter of the polyacrylonitrile-radical short carbon fiber is 10 microns, and average length is 9 centimetres；
(2) by said mixture compression moulding, hot pressing is then carried out on hot press, is sintered under protection of argon gas,
It crushes；The technological parameter are as follows: pressing pressure 15MPa, pressing speed are 6 mm/mins, and press temperature is 20 DEG C, compacting
Time is 30s；Hot pressing pressure is 15MPa, and hot pressing temperature is 200 DEG C, and hot pressing time is 10 minutes；Sintering temperature is 1400 DEG C,
Sintering time is 10 hours, sintering pressure 0.15MPa.
(3) by weight, 10 parts of copper oxide of addition, 4 parts of magnesia and 3 parts of magnesium chloride, and the additional amount of magnesium chloride is
The 1% of boron silty amount, 50% water that magnesia quality is added are mixed, are brushed in the surface of steel matrix brake block, natural air drying
For 24 hours, 1h is dried in vacuo under the conditions of 200 DEG C, using power be 3kW, scanning speed 8mm/sCO2Laser carries out laser melting coating
Processing, then with power be 1kW, frequency is that 50kHz ultrasonic wave is handled.
Embodiment 3
The preparation method of polyacrylonitrile-radical short carbon fiber brake block, includes the following steps,
(1) by weight, 60 parts of polyacrylonitrile-radical short carbon fiber, 30 parts of high carbon ferro-chrome, 80 parts of ferrosilicon, titanium dioxide are weighed
100 parts of silicon, 30 parts of vanadium iron, 20 parts of graphite, 30 parts of boron powder are put into batch mixer and are uniformly mixed, and mixing temperature is 30 DEG C, incorporation time
For 80min；The average diameter of the polyacrylonitrile-radical short carbon fiber is 11 microns, and average length is 9 centimetres；
(2) by said mixture compression moulding, hot pressing is then carried out on hot press, is sintered under protection of argon gas,
It crushes；The technological parameter are as follows: pressing pressure 15MPa, pressing speed are 6 mm/mins, and press temperature is 20 DEG C, compacting
Time is 30s；Hot pressing pressure is 15MPa, and hot pressing temperature is 200 DEG C, and hot pressing time is 10 minutes；Sintering temperature is 1400 DEG C,
Sintering time is 10 hours, sintering pressure 0.15MPa.
(3) by weight, 13 parts of copper oxide of addition, 8 parts of magnesia and 6 parts of magnesium chloride, and the additional amount of magnesium chloride is
The 2% of boron silty amount, 80% water that magnesia quality is added are mixed, are brushed in the surface of steel matrix brake block, natural air drying
30h is dried in vacuo 2h under the conditions of 220 DEG C, is 3kW using power, scanning speed 8mm/sCO2Laser carries out laser melting coating
Processing, then with power be 2kW, frequency is that 100kHz ultrasonic wave is handled.
Embodiment 4
The preparation method of polyacrylonitrile-radical short carbon fiber brake block, includes the following steps,
(1) by weight, 50 parts of polyacrylonitrile-radical short carbon fiber, 15 parts of high carbon ferro-chrome, 75 parts of ferrosilicon, titanium dioxide are weighed
70 parts of silicon, 24 parts of vanadium iron, 18 parts of graphite, 25 parts of boron powder are put into batch mixer and are uniformly mixed, and mixing temperature is 28 DEG C, incorporation time
For 73min；The average diameter of the polyacrylonitrile-radical short carbon fiber is 11 microns, and average length is 9 centimetres；
(2) by said mixture compression moulding, hot pressing is then carried out on hot press, is sintered under protection of argon gas,
It crushes；The technological parameter are as follows: pressing pressure 15MPa, pressing speed are 6 mm/mins, and press temperature is 20 DEG C, compacting
Time is 30s；Hot pressing pressure is 15MPa, and hot pressing temperature is 200 DEG C, and hot pressing time is 10 minutes；Sintering temperature is 1400 DEG C,
Sintering time is 10 hours, sintering pressure 0.15MPa.
(3) by weight, 11 parts of copper oxide of addition, 7 parts of magnesia and 5 parts of magnesium chloride, and the additional amount of magnesium chloride is
The 1% of boron silty amount, 55% water that magnesia quality is added are mixed, are brushed in the surface of steel matrix brake block, natural air drying
26h is dried in vacuo 2h under the conditions of 215 DEG C, is 3kW using power, scanning speed 8mm/sCO2Laser carries out laser melting coating
Processing, then with power be 1kW, frequency is that 85kHz ultrasonic wave is handled.
Reference examples 1
Difference with embodiment 4 is: step (3) omits vacuum drying, directly uses CO after air-drying2Laser process.
The preparation method of polyacrylonitrile-radical short carbon fiber brake block, includes the following steps,
(1) by weight, 50 parts of polyacrylonitrile-radical short carbon fiber, 15 parts of high carbon ferro-chrome, 75 parts of ferrosilicon, titanium dioxide are weighed
70 parts of silicon, 24 parts of vanadium iron, 18 parts of graphite, 25 parts of boron powder are put into batch mixer and are uniformly mixed, and mixing temperature is 28 DEG C, incorporation time
For 73min；The average diameter of the polyacrylonitrile-radical short carbon fiber is 11 microns, and average length is 9 centimetres；
(2) by said mixture compression moulding, hot pressing is then carried out on hot press, is sintered under protection of argon gas,
It crushes；The technological parameter are as follows: pressing pressure 15MPa, pressing speed are 6 mm/mins, and press temperature is 20 DEG C, compacting
Time is 30s；Hot pressing pressure is 15MPa, and hot pressing temperature is 200 DEG C, and hot pressing time is 10 minutes；Sintering temperature is 1400 DEG C,
Sintering time is 10 hours, sintering pressure 0.15MPa.
(3) by weight, 11 parts of copper oxide of addition, 7 parts of magnesia and 5 parts of magnesium chloride, and the additional amount of magnesium chloride is
The 1% of boron silty amount, 55% water that magnesia quality is added are mixed, are brushed in the surface of steel matrix brake block, natural air drying
Then 26h is 3kW using power, scanning speed 8mm/sCO2Laser carry out Laser Cladding Treatment, then with power be 1kW,
Frequency is that 85kHz ultrasonic wave is handled.
Reference examples 2
Difference with embodiment 3 is: step (2) enters (3) step after directly crushing.
The preparation method of polyacrylonitrile-radical short carbon fiber brake block, includes the following steps,
(1) by weight, 60 parts of polyacrylonitrile-radical short carbon fiber, 30 parts of high carbon ferro-chrome, 80 parts of ferrosilicon, titanium dioxide are weighed
100 parts of silicon, 30 parts of vanadium iron, 20 parts of graphite, 30 parts of boron powder are put into batch mixer and are uniformly mixed, and mixing temperature is 30 DEG C, incorporation time
For 80min；The average diameter of the polyacrylonitrile-radical short carbon fiber is 11 microns, and average length is 9 centimetres；
(2) it will be crushed after said mixture compression moulding；The technological parameter are as follows: pressing pressure 15MPa, pressing speed
For 6 mm/mins, press temperature is 20 DEG C, pressing time 30s.
(3) by weight, 13 parts of copper oxide of addition, 8 parts of magnesia and 6 parts of magnesium chloride, and the additional amount of magnesium chloride is
The 2% of boron silty amount, 80% water that magnesia quality is added are mixed, are brushed in the surface of steel matrix brake block, natural air drying
30h is dried in vacuo 2h under the conditions of 220 DEG C, is 3kW using power, scanning speed 8mm/sCO2Laser carries out laser melting coating
Processing, then with power be 2kW, frequency is that 100kHz ultrasonic wave is handled.
Performance test:
| Hardness HRC | |
| Embodiment 1 | 75 |
| Embodiment 2 | 73 |
| Embodiment 3 | 74 |
| Embodiment 4 | 75 |
| Reference examples 1 | 63 |
| Reference examples 2 | 51 |
As can be seen from the table, hardness of the invention is 73~75HRC, hence it is evident that is greater than reference examples, illustrates side of the invention
The brake block of method preparation has good hardness, and the service life is longer.
Claims (1)
1. the preparation method of polyacrylonitrile-radical short carbon fiber brake block, which is characterized in that include the following steps,
(1) by weight, 50 parts of polyacrylonitrile-radical short carbon fiber, 15 parts of high carbon ferro-chrome, 75 parts of ferrosilicon, silica 70 are weighed
Part, 24 parts of vanadium iron, 18 parts of graphite, 25 parts of boron powder are put into batch mixer and are uniformly mixed, and mixing temperature is 28 DEG C, and incorporation time is
73min；The average diameter of the polyacrylonitrile-radical short carbon fiber is 11 microns, and average length is 9 centimetres；
(2) by said mixture compression moulding, hot pressing is then carried out on hot press, is sintered under protection of argon gas, is crushed；
Pressing pressure is 15MPa, and pressing speed is 6 mm/mins, and press temperature is 20 DEG C, pressing time 30s；Hot pressing pressure is
15MPa, hot pressing temperature are 200 DEG C, and hot pressing time is 10 minutes；Sintering temperature is 1400 DEG C, and sintering time is 10 hours, sintering
Pressure is 0.15MPa；
(3) by weight, 11 parts of copper oxide of addition, 7 parts of magnesia and 5 parts of magnesium chloride, and the additional amount of magnesium chloride is boron powder
The 1% of quality, 55% water that magnesia quality is added mix, and brush on the surface of steel matrix brake block, natural air drying 26h, and 215
It is dried in vacuo 2h under the conditions of DEG C, using power is 3kW, scanning speed 8mm/sCO2Laser carries out Laser Cladding Treatment, then
It is 1kW with power, frequency is that 85kHz ultrasonic wave is handled.
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| CN201611007364.8A CN106402218B (en) | 2016-11-16 | 2016-11-16 | The preparation method of polyacrylonitrile-radical short carbon fiber brake block |
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| CN101660581A (en) * | 2009-10-12 | 2010-03-03 | 中南大学 | Metallic matrix spindle brake pad for wind driven generator and preparation method thereof |
| CN102537157A (en) * | 2012-02-29 | 2012-07-04 | 上海工程技术大学 | Material for preparing bullet train brake pad and preparing method thereof |
| CN102876290A (en) * | 2012-09-05 | 2013-01-16 | 杭州吉成汽车零部件有限公司 | Carbon-based friction material for automobile disc brake and preparation method thereof |
| CN103089875A (en) * | 2013-01-22 | 2013-05-08 | 东营友亮工贸有限公司 | Coconut carbon compound type brake pad and preparation method |
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