CN108530096A - A kind of preparation method of carbon-based braking automobile pair - Google Patents
A kind of preparation method of carbon-based braking automobile pair Download PDFInfo
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- CN108530096A CN108530096A CN201810426828.1A CN201810426828A CN108530096A CN 108530096 A CN108530096 A CN 108530096A CN 201810426828 A CN201810426828 A CN 201810426828A CN 108530096 A CN108530096 A CN 108530096A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 92
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000000034 method Methods 0.000 claims abstract description 42
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 37
- 239000004917 carbon fiber Substances 0.000 claims abstract description 37
- 238000000151 deposition Methods 0.000 claims abstract description 27
- 230000008021 deposition Effects 0.000 claims abstract description 13
- 238000000280 densification Methods 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 70
- 239000011265 semifinished product Substances 0.000 claims description 62
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 48
- 235000013312 flour Nutrition 0.000 claims description 35
- 239000000377 silicon dioxide Substances 0.000 claims description 35
- 238000010792 warming Methods 0.000 claims description 32
- 238000004321 preservation Methods 0.000 claims description 26
- 239000001294 propane Substances 0.000 claims description 24
- 229910002804 graphite Inorganic materials 0.000 claims description 16
- 239000010439 graphite Substances 0.000 claims description 16
- 239000000654 additive Substances 0.000 claims description 14
- 230000000996 additive effect Effects 0.000 claims description 14
- 238000005229 chemical vapour deposition Methods 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 13
- 238000007598 dipping method Methods 0.000 claims description 12
- 239000003345 natural gas Substances 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 12
- 238000003754 machining Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 7
- 230000004927 fusion Effects 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000000835 fiber Substances 0.000 abstract description 7
- 229920000784 Nomex Polymers 0.000 abstract description 4
- 239000004763 nomex Substances 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 15
- 239000002131 composite material Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 8
- 230000006399 behavior Effects 0.000 description 7
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 6
- 239000011856 silicon-based particle Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000002296 pyrolytic carbon Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011226 reinforced ceramic Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C04B35/806—
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
- C04B35/573—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide obtained by reaction sintering or recrystallisation
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
- C04B2235/524—Non-oxidic, e.g. borides, carbides, silicides or nitrides
- C04B2235/5248—Carbon, e.g. graphite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0034—Materials; Production methods therefor non-metallic
- F16D2200/0052—Carbon
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Braking Arrangements (AREA)
- Ceramic Products (AREA)
Abstract
The invention belongs to C-base composte material manufacturing fields, are related to a kind of preparation method of carbon-based braking automobile pair.The present invention includes the following steps：Step 1, carbon fiber precast body high-temperature heat treatment；Step 2, CVD deposition；Step 3, intermediate high-temperature heat treatment；Step 4, it finishes；Step 5, RMI densification process；Step 6, final high-temperature heat treatment.The present invention uses long fibre entirety Nomex for precast body, prepares a kind of carbon-based braking automobile pair of high-performance by CVD density and reaction melt impregnating process density, braking quality is stablized, high safety and reliability.
Description
Technical field
The invention belongs to C-base composte material manufacturing fields, are related to a kind of preparation method of carbon-based braking automobile pair.
Background technology
The brake material being now widely used on bullet train, racing car and aircraft mainly uses powdered metallurgical material and carbon
Carbon composite.However, high temperature bond easily occurs during applied at elevated temperature for powder metallurgy brake material, frictional behaviour fails,
Phenomena such as mechanical behavior under high temperature decays and service life is short；There are hygrometric state friction coefficient low, " morning disease " for carbon carbon composite, raw
The production problem that the period is long and production cost is high, restricts its development.Therefore, the carbon of new generation/pottery brake material developed in recent years is
It is the multiphase composition braking material of matrix with pyrolytic carbon, modified powder etc., with density using high-strength carbon fiber as reinforcement
Low (about 2.0g/cm3), the advantages that friction factor is high, braking is steady, anticorrosive, anti-oxidant, high temperature resistant and service life are long,
The material also has higher confficient of static friction and (moisture, mould and greasy dirt etc.) braking quality has under rugged environment
Better stability.The researcher of the units such as Stuttgart University, Germany and German space research institute has developed carbon fiber and increases
Strong carbon pottery based composites brake assemblage is applied to Porsche car；Modern architecture in Japan has tried out carbon fibre reinforced ceramics base composite wood
Expect brake shoe.
Braking automobile pair is structure/function integration material, should have good friction and wear behavior and thermal property, again
There is sufficiently high mechanical property.Compared with Brake for aircraft, the material prepared by braking automobile pair and Brake for aircraft one
It causes.However, the brake modes of braking automobile pair, friction and wear behavior and to mill material it is different, i.e. braking automobile pair is
With brake brake lining to mill, brake brake lining friction area is only 20% or so of brake assemblage area for clamp-type brake, i.e. brake assemblage；It is carbon-based
Braking automobile pair is that carbon-based brake assemblage brakes brake lining to mill with other materials, it is desirable that the abrasion of brake assemblage is much smaller than brake brake lining
Abrasion.Accordingly, with respect to the harsh requirement of Brake for aircraft, braking automobile pair is under conditions of ensureing safety, cost and performance
It is required that lower.
Currently, the main stream approach for preparing carbon brake assemblage both at home and abroad is chemical vapor infiltration (CVI) technique and resin dipping-carbon
Chemical industry skill.And there is heavy the shortcomings of carbon efficiencies are low, surface is easily crusted, the production cycle is long and process costs are high in both techniques.
Central South University's master thesis《Preparation and performance study of the automobile brake with C/C-SiC composite materials》Have studied a kind of automobile
The preparation method of brake block, this method prepare C/C-SiC using compression molding-reaction sintering method as raw material using staple fiber and answer
Condensation material brake block, short preparation period, antifading are good, but its mechanical property is low, material wear rate is big.Secondly,《Gu
Body rocketry》Curly hair one paper of table of 4th phase the 31st in 2008《Quickly prepare different precast body C/C composite material tribology
Performance study》It describes one kind and felt is molded as precast body using staple fiber, the side of C/C composite materials is prepared using quick CVI techniques
Method.Compared with cloth lamination precursor structure, the method increase the friction and wear behaviors of material.But compared with the present invention,
C/C composite finished product density is low, the production cycle is long for its, poor mechanical property, frictional behaviour are low.
Invention content
To overcome traditional CVI techniques and resin Impregnation carbonization process to prepare deficiency, CVI present in carbon brake assemblage technology
Technique is that the porous preforms such as carbon fiber are first carried out high-temperature heat treatment, is then charged into chemical vapor deposition stove, certain
It under temperature and pressure, is passed through carbon source gas and is cracked, the carbon of generation constantly deposits in the hole of precast body, keeps it gradually fine and close
Change, but haves the shortcomings that heavy carbon efficiencies are low, surface is easily crusted, the production cycle is long.And resin Impregnation carbonization process is in order into one
Step improves the bulk density of green body, needs to carry out densification repeatedly to it, to cause the cost of subsequent technique obviously to increase
Greatly.The present invention proposes a kind of with short production cycle, more excellent carbon brake assemblage preparation method of mechanical performance.
The technical scheme is that：A kind of preparation method of carbon-based braking automobile pair, detailed process include the following steps：
Step 1, carbon fiber precast body high-temperature heat treatment
Carbon fiber precast body is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；When being warming up to 1400 DEG C, fill
Ar is protected；2100 DEG C are continuously heating to, heat preservation 4h is heat-treated.
Step 2, CVD deposition
Carbon fiber precast body after above-mentioned heat treatment is put into chemical vapor deposition stove ,≤1KPa, pressurize are evacuated to
12h is warming up to 950 DEG C~1020 DEG C of depositing temperature, is passed through natural gas and propane is deposited, and gas discharge 120SLM~
180SLM, propane flow 25SLM~55SLM, furnace pressure are 1KPa~5KPa, and sedimentation time is 450h~550h, is obtained close
Degree is 1.42g/cm3~1.50g/cm3Carbon brake assemblage semi-finished product.
Step 3, intermediate high-temperature heat treatment
Carbon fiber precast body after above-mentioned CVD density is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；Work as liter
When temperature is to 1400 DEG C, fills Ar and protected；Be continuously heating to 2100 DEG C, heat preservation 4h is heat-treated, obtain carbon brake assemblage half at
Product.
Step 4, it finishes
Carbon brake assemblage semi-finished product are machined.
Step 5, RMI densification process
The braking automobile pair semi-finished product are placed in the graphite crucible equipped with silica flour in vacuum high temperature furnace and are melted
Silicon infiltrates.Silica flour additive amount is by being calculated：Silica flour additive amount/g=1.3mBase~1.5mBase.The mBaseIt is to obtain after step 4
The weight of braking automobile pair semi-finished product.Braking automobile pair semi-finished product are laid on silica flour and are gently pressed, several are equipped with silica flour
It is stacked and placed in vacuum high temperature furnace with the graphite crucible of braking automobile pair semi-finished product.It is evacuated to≤1KPa, after fidelity sky 12h, very
Reciprocal of duty cycle answers≤2KPa, is warming up to 1600 DEG C~1800 DEG C of depositing temperature, soaking time 2h~3h.It comes out of the stove, uses after dipping
Machining process carries out surface processing, and survey of weighing is close.Low density workpiece is continued to increase by the technique in step 5
Close, it is 1.80g/cm to finally obtain density3~2.10g/cm3Braking automobile pair semi-finished product.
Step 6, final high-temperature heat treatment
The braking automobile pair semi-finished product are put into heat-treatment furnace, be evacuated to≤1KPa when heat up；When being warming up to
At 1000 DEG C, fills Ar and protected；1600 DEG C~2000 DEG C are continuously heating to, heat preservation 1h~4h carries out high-temperature heat treatment.
The present invention uses long fibre entirety Nomex for precast body, passes through CVD density and reaction melt impregnating process density
Prepare a kind of carbon-based braking automobile pair of high-performance.Long fibre entirety Nomex+CVD techniques+melt impregnating process is in traditional CVI works
Skill is compared with resin Impregnation carbonization process, and long fibre entirety Nomex initial porosity is 60%~70%, belongs to porous carbon-based
Composite material, it fast densified can arrive density >=1.42g/cm by CVD techniques3, porosity be 25%~35% half at
Product finally penetrate into the inside of C/C composite materials using molten silicon under the action of capillary force, generate SiC ceramic matrix, most
Density >=1.80g/cm is obtained eventually3Finished product.Manufacturing cycle (table 1) is not only greatly shortened, and this composite material is with excellent
Different toughness and intensity, is shown in Table 2.
The manufacturing cycle of 1 different process of table
The properties of the different preparation method samples of table 2
By the sample when carrying out friction-wear test on MM1000-II type friction wear testing machines, work as brake pressure
For 0.8MPa, rotating speed 8579r/min, inertia 0.210Kgm2, radius of specimen 33mm, friction area 2220mm2, brake
Number 30 times, brake cruve are stablized, and sample friction surface is smooth.Simulation wheels-locked testing the results are shown in Table 3, test result show this 5
The average friction coefficient of Lot sample ranging from 0.314~0.425, wear rate are 0.0022~0.0026mm/ times face, difference batch
Its friction coefficient and the fluctuation range of wear rate are smaller between secondary, and friction and wear behavior is stablized.
The average friction coefficient and wear rate of 35 groups of samples of table
In addition, referring to Fig. 3, the full-page proof bench test of carbon-based braking automobile pair finished product of the present invention is in woods section of the U.S.
(LINK) it is carried out on the LINK3000 heavy-duty automobile brake device testing stands of engineering technology company production, with reference to SUBARU WRX STI
150111 vehicle technical conditions of FRONT, according to《Automobile brake perfrmance test method》(GB 12676-1999) is tested.Examination
Test the result shows that, in entire brake speed section, with the increase of brake pressure, the friction coefficient of brake assemblage is in integrally slow
The trend of rising, the average friction coefficient fluctuation range in different brake speed sections is smaller, and brake surface is smooth, illustrates carbon-based
The braking quality of braking automobile pair is stablized, high safety and reliability.
Description of the drawings
Fig. 1 is that RMI techniques prepare schematic diagram in step 5 of the present invention, in figure：1. graphite paper；2. green body；3. crucible；4. silicon
Powder；5. graphite paper gasket；
Fig. 2 is the flow chart of the present invention；
Fig. 3 is carbon-based braking automobile pair full-page proof bench test data trend figure.
Specific implementation mode
The specific implementation mode of the present invention is described further with reference to the accompanying drawings and examples.
Embodiment 1
The present embodiment is a kind of preparation method of carbon-based braking automobile pair, and referring to Fig. 2, detailed process is：
Step 1, carbon fiber precast body high-temperature heat treatment
Carbon fiber precast body is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；When being warming up to 1400 DEG C, fill
Ar is protected；2100 DEG C are continuously heating to, heat preservation 4h is heat-treated.
Step 2, CVD deposition
Carbon fiber precast body after above-mentioned heat treatment is put into chemical vapor deposition stove ,≤1KPa, pressurize are evacuated to
12h is warming up to 950 DEG C of depositing temperature, is passed through natural gas and propane is deposited, gas discharge 120SLM, propane flow
25SLM, furnace pressure 1KPa, sedimentation time 450h, it is 1.42g/cm to obtain density3~1.50g/cm3Carbon brake assemblage half
Finished product.
Step 3, intermediate high-temperature heat treatment
Carbon fiber precast body after above-mentioned CVD density is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；Work as liter
When temperature is to 1400 DEG C, fills Ar and protected；Be continuously heating to 2100 DEG C, heat preservation 4h is heat-treated, obtain carbon brake assemblage half at
Product.
Step 4, it finishes
Carbon brake assemblage semi-finished product are machined.
Step 5, RMI densification process, referring to Fig. 1.
The braking automobile pair semi-finished product by finishing are placed in the graphite crucible equipped with silica flour, in high-temperature vacuum
Reaction fusion adhesion is carried out in stove, silicon particle size is 320 mesh.The additive amount of the silica flour is：Silica flour additive amount/g=1.3mBase~
1.5mBase.The mBaseIt is the weight of the braking automobile pair semi-finished product obtained after step 4 is handled.
Braking automobile pair semi-finished product are laid on silica flour and are gently pressed.
Multiple graphite crucibles equipped with silica flour and braking automobile pair semi-finished product are stacked and placed in vacuum high temperature furnace.
≤ 1KPa is evacuated to the vacuum high temperature furnace, after fidelity sky 12h, the vacuum degree of the vacuum high temperature furnace answers≤
2KPa.The vacuum high temperature furnace is warming up to 1600 DEG C of depositing temperature, keeps the temperature 2.5h.It completes to stop to the automobile after heat preservation
The dipping of vehicle pair semi-finished product.
It comes out of the stove after dipping, surface processing is carried out using conventional machining process, and survey of weighing is close.Density is low
Workpiece continue to be impregnated by above-mentioned technique, obtain density >=1.80g/cm3Braking automobile pair semi-finished product.
Step 6, high-temperature heat treatment.
The braking automobile pair semi-finished product are put into heat-treatment furnace.The heat-treatment furnace is evacuated to≤1KPa when liter
Temperature；When being warming up to 1000 DEG C, fills Ar and protected；1600 DEG C are continuously heating to, heat preservation 2h carries out high-temperature heat treatment.
Embodiment 2
The present embodiment is a kind of preparation method of carbon-based braking automobile pair, and detailed process is：
Step 1, carbon fiber precast body high-temperature heat treatment
Carbon fiber precast body is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；When being warming up to 1400 DEG C, fill
Ar is protected；2100 DEG C are continuously heating to, heat preservation 4h is heat-treated.
Step 2, CVD deposition
Carbon fiber precast body after above-mentioned heat treatment is put into chemical vapor deposition stove ,≤1KPa, pressurize are evacuated to
12h is warming up to 970 DEG C of depositing temperature, is passed through natural gas and propane is deposited, gas discharge 135SLM, propane flow
32SLM, furnace pressure 2KPa, sedimentation time 480h, it is 1.42g/cm to obtain density3~1.50g/cm3Carbon brake assemblage half
Finished product.
Step 3, intermediate high-temperature heat treatment
Carbon fiber precast body after above-mentioned CVD density is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；Work as liter
When temperature is to 1400 DEG C, fills Ar and protected；Be continuously heating to 2100 DEG C, heat preservation 4h is heat-treated, obtain carbon brake assemblage half at
Product.
Step 4, it finishes
Carbon brake assemblage semi-finished product are machined.
Step 5, RMI densification process
The braking automobile pair semi-finished product by finishing are placed in the graphite crucible equipped with silica flour, in high-temperature vacuum
Reaction fusion adhesion is carried out in stove, silicon particle size is 320 mesh.The additive amount of the silica flour is：Silica flour additive amount/g=1.3mBase~
1.5mBase.The mBaseIt is the weight of the braking automobile pair semi-finished product obtained after step 4 is handled.
Braking automobile pair semi-finished product are laid on silica flour and are gently pressed.
Multiple graphite crucibles equipped with silica flour and braking automobile pair semi-finished product are stacked and placed in vacuum high temperature furnace.
≤ 1KPa is evacuated to the vacuum high temperature furnace, after fidelity sky 12h, the vacuum degree of the vacuum high temperature furnace answers≤
2KPa.The vacuum high temperature furnace is warming up to 1650 DEG C of depositing temperature, keeps the temperature 2.5h.It completes to stop to the automobile after heat preservation
The dipping of vehicle pair semi-finished product.
It comes out of the stove after dipping, surface processing is carried out using conventional machining process, and survey of weighing is close.Density is low
Workpiece continue to be impregnated by above-mentioned technique, obtain density >=1.80g/cm3Braking automobile pair semi-finished product.
Step 6, high-temperature heat treatment.
The braking automobile pair semi-finished product are put into heat-treatment furnace.The heat-treatment furnace is evacuated to≤1KPa when liter
Temperature；When being warming up to 1000 DEG C, fills Ar and protected；1600 DEG C are continuously heating to, heat preservation 2h carries out high-temperature heat treatment.
Embodiment 3
The present embodiment is a kind of preparation method of carbon-based braking automobile pair, and detailed process is：
Step 1, carbon fiber precast body high-temperature heat treatment
Carbon fiber precast body is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；When being warming up to 1400 DEG C, fill
Ar is protected；2100 DEG C are continuously heating to, heat preservation 4h is heat-treated.
Step 2, CVD deposition
Carbon fiber precast body after above-mentioned heat treatment is put into chemical vapor deposition stove ,≤1KPa, pressurize are evacuated to
12h is warming up to 990 DEG C of depositing temperature, is passed through natural gas and propane is deposited, gas discharge 150SLM, propane flow
39SLM, furnace pressure 3KPa, sedimentation time 510h, it is 1.42g/cm to obtain density3~1.50g/cm3Carbon brake assemblage half
Finished product.
Step 3, intermediate high-temperature heat treatment
Carbon fiber precast body after above-mentioned CVD density is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；Work as liter
When temperature is to 1400 DEG C, fills Ar and protected；Be continuously heating to 2100 DEG C, heat preservation 4h is heat-treated, obtain carbon brake assemblage half at
Product.
Step 4, it finishes
Carbon brake assemblage semi-finished product are machined.
Step 5, RMI densification process
The braking automobile pair semi-finished product by finishing are placed in the graphite crucible equipped with silica flour, in high-temperature vacuum
Reaction fusion adhesion is carried out in stove, silicon particle size is 320 mesh.The additive amount of the silica flour is：Silica flour additive amount/g=1.3mBase~
1.5mBase.The mBaseIt is the weight of the braking automobile pair semi-finished product obtained after step 4 is handled.
Braking automobile pair semi-finished product are laid on silica flour and are gently pressed.
Multiple graphite crucibles equipped with silica flour and braking automobile pair semi-finished product are stacked and placed in vacuum high temperature furnace.
≤ 1KPa is evacuated to the vacuum high temperature furnace, after fidelity sky 12h, the vacuum degree of the vacuum high temperature furnace answers≤
2KPa.The vacuum high temperature furnace is warming up to 1700 DEG C of depositing temperature, keeps the temperature 2.5h.It completes to stop to the automobile after heat preservation
The dipping of vehicle pair semi-finished product.
It comes out of the stove after dipping, surface processing is carried out using conventional machining process, and survey of weighing is close.Density is low
Workpiece continue to be impregnated by above-mentioned technique, obtain density >=1.80g/cm3Braking automobile pair semi-finished product.
Step 6, high-temperature heat treatment.
The braking automobile pair semi-finished product are put into heat-treatment furnace.The heat-treatment furnace is evacuated to≤1KPa when liter
Temperature；When being warming up to 1000 DEG C, fills Ar and protected；1600 DEG C are continuously heating to, heat preservation 2h carries out high-temperature heat treatment.
Embodiment 4
The present embodiment is a kind of preparation method of carbon-based braking automobile pair, and detailed process is：
Step 1, carbon fiber precast body high-temperature heat treatment
Carbon fiber precast body is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；When being warming up to 1400 DEG C, fill
Ar is protected；2100 DEG C are continuously heating to, heat preservation 4h is heat-treated.
Step 2, CVD deposition
Carbon fiber precast body after above-mentioned heat treatment is put into chemical vapor deposition stove ,≤1KPa, pressurize are evacuated to
12h is warming up to 1010 DEG C of depositing temperature, is passed through natural gas and propane is deposited, gas discharge 165SLM, propane flow
46SLM, furnace pressure 4KPa, sedimentation time 530h, it is 1.42g/cm to obtain density3~1.50g/cm3Carbon brake assemblage half
Finished product.
Step 3, intermediate high-temperature heat treatment
Carbon fiber precast body after above-mentioned CVD density is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；Work as liter
When temperature is to 1400 DEG C, fills Ar and protected；Be continuously heating to 2100 DEG C, heat preservation 4h is heat-treated, obtain carbon brake assemblage half at
Product.
Step 4, it finishes
Carbon brake assemblage semi-finished product are machined.
Step 5, RMI densification process
The braking automobile pair semi-finished product by finishing are placed in the graphite crucible equipped with silica flour, in high-temperature vacuum
Reaction fusion adhesion is carried out in stove, silicon particle size is 320 mesh.The additive amount of the silica flour is：Silica flour additive amount/g=1.3mBase~
1.5mBase.The mBaseIt is the weight of the braking automobile pair semi-finished product obtained after step 4 is handled.
Braking automobile pair semi-finished product are laid on silica flour and are gently pressed.
Multiple graphite crucibles equipped with silica flour and braking automobile pair semi-finished product are stacked and placed in vacuum high temperature furnace.
≤ 1KPa is evacuated to the vacuum high temperature furnace, after fidelity sky 12h, the vacuum degree of the vacuum high temperature furnace answers≤
2KPa.The vacuum high temperature furnace is warming up to 1750 DEG C of depositing temperature, keeps the temperature 2.5h.It completes to stop to the automobile after heat preservation
The dipping of vehicle pair semi-finished product.
It comes out of the stove after dipping, surface processing is carried out using conventional machining process, and survey of weighing is close.Density is low
Workpiece continue to be impregnated by above-mentioned technique, obtain density >=1.80g/cm3Braking automobile pair semi-finished product.
Step 6, high-temperature heat treatment.
The braking automobile pair semi-finished product are put into heat-treatment furnace.The heat-treatment furnace is evacuated to≤1KPa when liter
Temperature；When being warming up to 1000 DEG C, fills Ar and protected；1600 DEG C are continuously heating to, heat preservation 2h carries out high-temperature heat treatment.
Embodiment 5
The present embodiment is a kind of preparation method of carbon-based braking automobile pair, and detailed process is：
Step 1, carbon fiber precast body high-temperature heat treatment
Carbon fiber precast body is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；When being warming up to 1400 DEG C, fill
Ar is protected；2100 DEG C are continuously heating to, heat preservation 4h is heat-treated.
Step 2, CVD deposition
Carbon fiber precast body after above-mentioned heat treatment is put into chemical vapor deposition stove ,≤1KPa, pressurize are evacuated to
12h is warming up to 1020 DEG C of depositing temperature, is passed through natural gas and propane is deposited, gas discharge 180SLM, propane flow
55SLM, furnace pressure 5KPa, sedimentation time 550h, it is 1.42g/cm to obtain density3~1.50g/cm3Carbon brake assemblage half
Finished product.
Step 3, intermediate high-temperature heat treatment
Carbon fiber precast body after above-mentioned CVD density is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；Work as liter
When temperature is to 1400 DEG C, fills Ar and protected；Be continuously heating to 2100 DEG C, heat preservation 4h is heat-treated, obtain carbon brake assemblage half at
Product.
Step 4, it finishes
Carbon brake assemblage semi-finished product are machined.
Step 5, RMI densification process
The braking automobile pair semi-finished product by finishing are placed in the graphite crucible equipped with silica flour, in high-temperature vacuum
Reaction fusion adhesion is carried out in stove, silicon particle size is 320 mesh.The additive amount of the silica flour is：Silica flour additive amount/g=1.3mBase~
1.5mBase.The mBaseIt is the weight of the braking automobile pair semi-finished product obtained after step 4 is handled.
Braking automobile pair semi-finished product are laid on silica flour and are gently pressed.
Multiple graphite crucibles equipped with silica flour and braking automobile pair semi-finished product are stacked and placed in vacuum high temperature furnace.
≤ 1KPa is evacuated to the vacuum high temperature furnace, after fidelity sky 12h, the vacuum degree of the vacuum high temperature furnace answers≤
2KPa.The vacuum high temperature furnace is warming up to 1800 DEG C of depositing temperature, keeps the temperature 2.5h.It completes to stop to the automobile after heat preservation
The dipping of vehicle pair semi-finished product.
It comes out of the stove after dipping, surface processing is carried out using conventional machining process, and survey of weighing is close.Density is low
Workpiece continue to be impregnated by above-mentioned technique, obtain density >=1.80g/cm3Braking automobile pair semi-finished product.
Step 6, high-temperature heat treatment.
The braking automobile pair semi-finished product are put into heat-treatment furnace.The heat-treatment furnace is evacuated to≤1KPa when liter
Temperature；When being warming up to 1000 DEG C, fills Ar and protected；1600 DEG C are continuously heating to, heat preservation 2h carries out high-temperature heat treatment.
Claims (6)
1. a kind of preparation method of carbon-based braking automobile pair, it is characterized in that the preparation method comprises the following steps：
Step 1, carbon fiber precast body high-temperature heat treatment：
Carbon fiber precast body is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；When being warming up to 1400 DEG C, fill Ar into
Row protection；2100 DEG C are continuously heating to, heat preservation 4h is heat-treated；
Step 2, CVD deposition：
Carbon fiber precast body after step 1 is heat-treated is put into chemical vapor deposition stove, is evacuated to≤1KPa, pressurize 12h,
It is warming up to 950 DEG C~1020 DEG C of depositing temperature, natural gas is passed through and propane is deposited, gas discharge 120SLM~
180SLM, propane flow 25SLM~55SLM, furnace pressure are 1KPa~5KPa, and sedimentation time is 450h~550h, is obtained close
Degree is 1.42g/cm3~1.50g/cm3Carbon brake assemblage semi-finished product；
Step 3, intermediate high-temperature heat treatment：
Carbon fiber precast body after step 2CVD density is put into heat-treatment furnace, be evacuated to≤1KPa when heat up；Work as heating
When to 1400 DEG C, fills Ar and protected；2100 DEG C are continuously heating to, heat preservation 4h is heat-treated, and carbon brake assemblage semi-finished product are obtained；
Step 4, it finishes：
Carbon brake assemblage semi-finished product are machined；
Step 5, RMI densification process：
By step 4 finish after braking automobile pair semi-finished product be placed in the graphite crucible equipped with silica flour in vacuum high temperature furnace into
Row reaction fusion adhesion；Silica flour additive amount is by being calculated：Silica flour additive amount/g=1.3mBase~1.5mBase；The mBaseIt is after step 4
The weight of the braking automobile pair semi-finished product arrived；Braking automobile pair semi-finished product are laid on silica flour and are gently pressed, several are equipped with
The graphite crucible of silica flour and braking automobile pair semi-finished product is stacked and placed in vacuum high temperature furnace；It is evacuated to≤1KPa, fidelity sky 12h
Afterwards, vacuum degree answers≤2KPa, is warming up to 1600 DEG C~1800 DEG C of depositing temperature, soaking time 2h~3h；It comes out of the stove after dipping,
Surface processing is carried out using machining process, and survey of weighing is close；Low density workpiece is continued to carry out by the technique in step 5
Density, it is 1.80g/cm to finally obtain density3~2.10g/cm3Braking automobile pair semi-finished product；
Step 6, final high-temperature heat treatment：
By step 5, treated that braking automobile pair semi-finished product are put into heat-treatment furnace, be evacuated to≤1KPa when heat up；Work as heating
When to 1000 DEG C, fills Ar and protected；1600 DEG C~2000 DEG C are continuously heating to, heat preservation 1h~4h carries out high-temperature heat treatment.
2. the preparation method of carbon-based braking automobile pair according to claim 1, it is characterized in that：In the step 2, by step
Carbon fiber precast body after 1 heat treatment is put into chemical vapor deposition stove, is evacuated to≤1KPa, pressurize 12h is warming up to deposition
950 DEG C of temperature, is passed through natural gas and propane is deposited, gas discharge 120SLM, propane flow 25SLM, and furnace pressure is
1KPa, sedimentation time 450h, it is 1.42g/cm to obtain density3~1.50g/cm3Carbon brake assemblage semi-finished product.
3. the preparation method of carbon-based braking automobile pair according to claim 1, it is characterized in that：In the step 2, by step
Carbon fiber precast body after 1 heat treatment is put into chemical vapor deposition stove, is evacuated to≤1KPa, pressurize 12h is warming up to deposition
970 DEG C of temperature, is passed through natural gas and propane is deposited, gas discharge 135SLM, propane flow 32SLM, and furnace pressure is
2KPa, sedimentation time 480h, it is 1.42g/cm to obtain density3~1.50g/cm3Carbon brake assemblage semi-finished product.
4. the preparation method of carbon-based braking automobile pair according to claim 1, it is characterized in that：In the step 2, by step
Carbon fiber precast body after 1 heat treatment is put into chemical vapor deposition stove, is evacuated to≤1KPa, pressurize 12h is warming up to deposition
990 DEG C of temperature, is passed through natural gas and propane is deposited, gas discharge 150SLM, propane flow 39SLM, and furnace pressure is
3KPa, sedimentation time 510h, it is 1.42g/cm to obtain density3~1.50g/cm3Carbon brake assemblage semi-finished product.
5. the preparation method of carbon-based braking automobile pair according to claim 1, it is characterized in that：In the step 2, by step
Carbon fiber precast body after 1 heat treatment is put into chemical vapor deposition stove, is evacuated to≤1KPa, pressurize 12h is warming up to deposition
1010 DEG C of temperature, is passed through natural gas and propane is deposited, gas discharge 165SLM, propane flow 46SLM, and furnace pressure is
4KPa, sedimentation time 530h, it is 1.42g/cm to obtain density3~1.50g/cm3Carbon brake assemblage semi-finished product.
6. the preparation method of carbon-based braking automobile pair according to claim 1, it is characterized in that：In the step 2, by step
Carbon fiber precast body after 1 heat treatment is put into chemical vapor deposition stove, is evacuated to≤1KPa, pressurize 12h is warming up to deposition
1020 DEG C of temperature, is passed through natural gas and propane is deposited, gas discharge 180SLM, propane flow 55SLM, and furnace pressure is
5KPa, sedimentation time 550h, it is 1.42g/cm to obtain density3~1.50g/cm3Carbon brake assemblage semi-finished product.
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