CN104692823B - A kind of pantograph preparation method of C/C composite draw runners - Google Patents
A kind of pantograph preparation method of C/C composite draw runners Download PDFInfo
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Abstract
The present invention relates to a kind of pantograph manufacture method of C/C composite draw runners, belong to use for electric locomotive technical field of material.The present invention presses charcoal cloth and charcoal felt mass ratio 7.5 9：31, by 0 ° of individual layer without latitude charcoal cloth, Carbon fibe net tire, 90 ° circulate superposition successively without latitude charcoal cloth, Carbon fibe net tire after, the method for using relay-type acupuncture is 0.3~0.6g/cm introduce Carbon fibe beam to be made density perpendicular to laying direction3The acupuncture of 2.5D Carbon fibes entirety felt；Then by after high-temperature heat treatment before 1500~2100 DEG C are carried out, carrying out chemical vapor deposition pyrolytic carbon treatment, until obtaining density for 1.4~1.6g/cm3C/C composites；Then after passing sequentially through machining, polymer impregnated charing process, the graphitization processing of reserved size, it is machined out by design size and obtains finished product.Present invention process is simple, and the mechanics of products obtained therefrom, electric property are excellent, are easy to commercial application.
Description
Technical field
The present invention relates to a kind of pantograph manufacture method of C/C composite draw runners, belong to use for electric locomotive material system
Standby technical field.
Background technology
The bullet train of electric propulsion is, by the carbon draw runner on pantograph carbon slide and contact line conducting wire CONTACT WITH FRICTION, to incite somebody to action
Electric current on power network is transferred to locomotive electrical system, so as to supply high speed train motive, maintains what locomotive normally ran.To realize
Above-mentioned functions, pantograph carbon draw runner must possess low resistivity and good wearability.
During train high-speed cruising, due to the vibration of netting twine, carbon draw runner is often subject to the impact of power network, particularly exists
By power network " hard spot " when, the impact that the carbon draw runner on pantograph pan bears is even more serious, sometimes even occur carbon is slided
The phenomenon that plate directly thrusts, directly affects the safety and reliability of train operation.Therefore, pantograph carbon draw runner must possess
Excellent mechanical performance, toughness particularly high.
To ensure electric locomotive operation safety, extend the service life of carbon slipper, carbon draw runner must have excellent machinery concurrently
Performance and low resistivity.At present, number of patent application 201410111706.5 " a kind of railway locomotive Material for Pantograph Slide and
Its preparation method " discloses one kind with petroleum coke and graphite as raw material, pitch as binder, by traditional extruding, roasting, charcoal
The pantograph pan of chemical industry skill manufacture, its mechanical performance is very low, and properties of product are unstable.Number of patent application
200710017899.8 " preparation methods of charcoal/charcoal pantograph pan in use for electric locomotive " disclose one kind and use chemical vapor deposition
The charcoal/charcoal pantograph pan prepared with resin dipping-charring process, causes to prepare carbon cunning long due to being provided without preceding Technology for Heating Processing
During bar, easily there is deformation, bending, influence product size precision, and be heat-treated after being provided without, the resistivity of charcoal draw runner is high, anti-impact
Hit toughness low.
The content of the invention
The technical problems to be solved by the invention are directed to that existing pure carbon slipper bad mechanical strength, resistivity is high, performance not
The problems such as stabilization, there is provided it is a kind of with very good mechanical properties, low-resistivity and pantograph C/C draw runners stable and reliable for performance and its
Preparation method.
A kind of pantograph preparation method of C/C composite draw runners of the present invention, comprises the steps：
Step one
By charcoal cloth and charcoal felt mass ratio 7.5-9：3-1, preferably 8-9：2-1, more preferably 8:2, by 0 ° of nothing of individual layer
Latitude charcoal cloth, Carbon fibe net tire, 90 ° without latitude charcoal cloth, Carbon fibe net tire successively successively circulation superposition after, using the side of relay-type acupuncture
Method is 0.3~0.6g/cm introduce Carbon fibe beam to be made density perpendicular to laying direction3The acupuncture of 2.5D Carbon fibes entirety felt；
Step 2
Will step one gained Carbon fibe acupuncture entirety felt fix after be placed in heating furnace, under protective atmosphere, in 1500~
2100 DEG C, preferably 1800-2100 DEG C, more preferably 1800-2000 DEG C, carry out preceding high-temperature heat treatment；Obtain preceding high temperature
Overall felt after heat treatment；
Step 3
Overall felt after high-temperature heat treatment before step 2 gained is carried out into chemical vapor deposition pyrolytic carbon treatment, is deposited
Uniform and density is 1.4~1.6g/cm3C/C composites；
Step 4
It is machined by the size of design draw runner, and polymer impregnated-charing process is carried out after reserved allowance,
Until obtaining density for 1.7~1.9g/cm3High density C/C composites；
Step 5
Under protective atmosphere, graphitization processing, graphitization processing are carried out to step 4 gained high density C/C composites
When, it is 1800~2600 DEG C, more preferably preferably 1800-2300 DEG C, 2000-2300 DEG C to control temperature.
Step 6
After being machined by the size of design draw runner, cleaning obtains finished product.
A kind of pantograph of the present invention preparation method of C/C composite draw runners, charcoal cloth described in step one is 0 ° without latitude
Charcoal cloth and 90 ° are without latitude charcoal cloth.
A kind of pantograph of the present invention preparation method of C/C composite draw runners, charcoal felt described in step one is Carbon fibe
Net tire.
A kind of pantograph of the present invention preparation method of C/C composite draw runners, charcoal cloth described in step one and charcoal felt
Mass ratio is 7.5-9：3-1, preferably 8-9：2-1, more preferably 8:2；Especially when charcoal cloth is with the mass ratio of charcoal felt
8：When 2, its mechanical property is better than 7 from far away:(traditional ratio is 7 to 3 ratio：3).
A kind of pantograph of the present invention preparation method of C/C composite draw runners, in step 2, the preceding high-temperature heat treatment
Time be 3~10 hours, preferably 3-8 hours, more preferably 5-8 hours.
A kind of pantograph of the present invention preparation method of C/C composite draw runners, in step 2, the protective atmosphere is selected from
One kind in argon gas atmosphere, nitrogen atmosphere.
A kind of pantograph of the present invention preparation method of C/C composite draw runners, in step 2, during preceding high-temperature heat treatment,
It is pressure-fired to control furnace pressure.
In order to lift the performance of final products, the preferred embodiment of step 2 of the present invention is：
Step one gained Carbon fibe acupuncture entirety felt is clamped using graphite frock, it is fixed, carbon felt is prevented because of chi
It is very little elongated and deform；High-temperature heat treatment before then carrying out in the high temperature heat treatment furnace, during preceding high-temperature process, protective atmosphere used is
Argon gas, pressure of the argon gas in stove is pressure-fired.Preceding high-temperature heat treatment had both alleviated Carbon fibe precast body and had been produced during braiding
Raw residual stress, eliminates the glue on Carbon fibe beam surface again.
A kind of pantograph of the present invention preparation method of C/C composite draw runners, in step 3, chemical vapor deposition pyrolytic
Condition during carbon is：
Carbon-source gas are selected from least one in methane, propylene, natural gas；
Diluent gas is nitrogen and/or hydrogen；
Carbon-source gas are 1 with the volume ratio of diluent gas:1~3；
Depositing temperature is 800~1100 DEG C, more preferably preferably 850-1050 DEG C, 850-950 DEG C；
Sedimentation time is 200~400 hours, preferably 200-350 hours, more preferably 250-350 hours.
In order to further lift the performance of final products, be preferable to carry out side of the present invention in chemical vapor deposition pyrolytic carbon
Case is：
Overall felt after high-temperature heat treatment before step 2 gained is fixed in graphite frock, the graphite frock can be adjusted
Angles and positions of the body felt in cvd furnace；Using at least one in methane, propylene, natural gas as carbon-source gas, with nitrogen
And/or hydrogen, used as diluent gas, carbon-source gas are 1 with the volume ratio of diluent gas:1~3, first deposition is for a period of time to entirety
0.4~0.6g/cm of felt weightening3Afterwards；Felt body is rotated by axle of length direction center line, its anglec of rotation is 1-180 degree, continues heavy
The prepared density of product is 1.4~1.6g/cm3Low-density C/C composites；It is 800~1100 DEG C that temperature is controlled during deposition.At this
In scheme, why felt body is rotated by axle of length direction center line, answered to reduce the C/C caused by furnace atmosphere is irregular
Condensation material density irregularity, it is ensured that the uniformity of felt body different parts deposition.
A kind of pantograph of the present invention preparation method of C/C composite draw runners, in step 4, by the size of design draw runner
Being machined and reserved allowance refers to：After machining, 1-2mm surpluses are stayed in draw runner width.
A kind of pantograph of the present invention preparation method of C/C composite draw runners, carrying out polymer impregnated-charing process is
Polymer impregnated-charing process is carried out after composite after machining is gripped using graphite frock.
A kind of pantograph of the present invention preparation method of C/C composite draw runners, in step 4, carry out it is polymer impregnated-
During charing process, polymer used is resin or pitch；The resin is selected from least one in furane resins, phenolic resin.
A kind of pantograph of present invention preparation method of C/C composite draw runners, in step 4, during impregnating resin, controls
Temperature is 50-170 DEG C, pressure is 1~3MPa, and the single impregnation time is 1-5 hours；After the completion of single impregnation resin, in 180-
300 DEG C carry out solidification 1-5 hours；At 800~1100 DEG C, preferably 850-1050 DEG C, more preferably 850-950 after solidification
DEG C, charing 40-60 hours is carried out, Carbonization Atmospheres are nitrogen；Repeated impregnations, solidification, charring process until obtain density for 1.7~
1.9g/cm3High density C/C composites.
A kind of pantograph of present invention preparation method of C/C composite draw runners, in step 4, during impregnating pitch, controls
Temperature is 150-250 DEG C, and pressure is 1~3MPa, and the single impregnation time is 1-5 hours；800~1100 after single impregnation pitch
DEG C, be preferably 850-1050 DEG C, more preferably 850-950 DEG C, carry out charing 40-60 hours, Carbonization Atmospheres are nitrogen；Weight
Multiple dipping, charring process are until obtain density for 1.7~1.9g/cm3High density C/C composites.
A kind of pantograph of the present invention preparation method of C/C composite draw runners, in step 5, gas used by graphitization processing
Atmosphere is selected from the one kind in argon gas atmosphere, nitrogen atmosphere；During graphitization processing, furnace pressure is controlled for pressure-fired, the time is 3~10
Hour, preferably 3-8 hours, more preferably 5-8 hours.Why the present invention will control time and the temperature of graphitization processing
Degree is because the synergy for passing through above-mentioned parameter, one is adjusted to most preferably by the interface binding power between Carbon fibe and pyrolytic carbon
Scope, improve C/C draw runners impact flexibility.At the same time the resistivity of C/C draw runners is also reduced.
A kind of pantograph of the present invention preparation method of C/C composite draw runners, in step 6, the cleaning is ultrasonic wave
Cleaning, when the ultrasonic wave is cleaned, washing lotion used is deionized water.The frequency of ultrasonic wave used is 20-30kHz.
Principle and advantage
(1) present invention with a high proportion of charcoal cloth and charcoal felt into 2.5D acupunctures entirety felt precast body as reinforcement, utilize
Chemical vapor infiltration process deposits pyrolytic carbon is to the good protection feature of Carbon fibe, and polymer impregnated-charring process
High efficiency and high compactness, the C/C pantographs draw runner of preparation are fine and close, and mechanical performance is significantly larger than the pure carbon of existing pantograph and slides
Bar.The engineering problem that pure carbon slipper is broken because being hit in use is can solve the problem that, the use of carbon slipper is increased substantially
In the life-span, the operation safety of electric locomotive is ensured.
(2) a high proportion of charcoal cloth and charcoal felt are used in step one of the present invention, the mechanical performance of final C/C draw runners is ensure that
Excellent, particularly prominent toughness.
(3) present invention alleviates stress of the precast body during braiding using preceding heat treatment, is heat-treated after and improved
The degree of graphitization of C/C draw runners, reduces resistivity, and the interface binding power between Carbon fibe and pyrolytic carbon has been adjusted into one
(interface binding power compared with prior art, between Carbon fibe of the present invention and pyrolytic carbon is slightly below existing for individual rational scope
Interface binding power in material prepared by technology between Carbon fibe and pyrolytic carbon), and then improve the impact flexibility of C/C draw runners.
(4) in chemical vapor infiltration stage and polymer impregnated-carbonization stage, using the clamping of graphite frock, fix；This can
To ensure large scale, aspect is more indeformable than in charcoal draw runner preparation process.
(5) by the chemical vapor deposition stage, C/C composites being rotated by axle of length direction center line, it is ensured that
The uniformity of product.
(6) present invention is under the synergy of preparation process and each parameter, can realize the nearly size of C/C draw runners into
Type, stock utilization is high, yield rate intimate 100%, and properties of product are reliable and stable.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of pantograph provided in an embodiment of the present invention 2.5D acupunctures entirety felt precast body；
Accompanying drawing 2 is the process chart of pantograph provided in an embodiment of the present invention C/C draw runner preparation methods.
As can be seen from Figure 10 ° of laminated cloth, net tire and 90 ° of laminated cloths are alternately laminated, by Z-direction fibre prickling into
2.5D entirety felts.
As can be seen from Figure 2 the invention mainly comprises preceding heat treatment, chemical vapor infiltration, it is polymer impregnated-charing,
Afterwards be heat-treated and be machined etc. four committed steps.
Specific implementation
Comparative example 1：The SK980 pure carbon slide plate for pantograph of Austrian Hough Man production, specific performance parameter is shown in Table 1.
Comparative example 2：The charcoal/charcoal pantograph pan of Chaoma Science ＆ Technology Co., Ltd., Xian's production, performance is referring to Chinese patent Shen
Please number 200710017899.8 " preparation methods of charcoal/charcoal pantograph pan in use for electric locomotive ", the specific performance parameter such as institute of table 1
Show.
Embodiment 1：
It is 8 to use cloth felt ratio:2 2.5D Carbon fibes acupuncture entirety felt is precast body, by chemical vapor infiltration technique system
It is 1.42g/cm for density3C/C porous bodies, by three resin dipping-charring process, be prepared for density for 1.82g/cm3
C/C composites, by 2000 DEG C of high-temperature heat treatments and machining obtain C/C draw runners.
C/C pantograph carbons draw runner in the present embodiment is mainly prepared by following steps：
(1) first, PAN types T700 (12K) Carbon fibe for being produced using toray company (Toray) is made net tire and nothing
Latitude cloth, it is ensured that laminated cloth is 8 with the mass ratio of net tire:2, by 0 ° of laminated cloth of individual layer, net plies, 90 ° of laminated cloths, net plies successively
Circulation superposition, then, using the method for relay-type acupuncture, to be made density be 0.56g/cm3Carbon fibe precast body, size is
1050*36*25mm；
(2) use the graphite frock for designing by precast body under argon atmosphere, high-temperature heat treatment before carrying out 1800 DEG C,
All times 5 hours, protective atmosphere is argon gas, and pressure is pressure-fired (i.e. only slight beyond the scale of pressure vacuum gauge 0)；
(3) it is carbon-source gas to use propylene, and hydrogen is carrier gas, and propylene is 1 with the volume ratio of hydrogen:2, using isothermal
Vapor infiltration method is learned to precast body in 1050 DEG C of sinking product pyrolytic carbons, after 100 hours, C/C composite densities are deposition
0.92g/cm3, with length direction center line as axle, C/C composites being rotated 180 °, redeposition is obtained density after 130 hours
It is 1.42g/cm3C/C composites.
(4) according to carbon draw runner size, every is left surplus 1mm, and the C/C composites of above-mentioned low-density are carried out into machinery adds
Work.
(5) above-mentioned C/C draw runners are put into vacuum-pressure impregnating autoclave using the graphite frock of design, are with furane resins
Impregnating agent, using high-pressure impregnation PROCESS FOR TREATMENT.Before dipping, sample should be preheated first, and dipping temperature is 60 DEG C, and impregnation pressure is
1.5MPa, the dwell time is 2 hours.Afterwards, 200 DEG C are warming up to, insulation is solidified for about 2 hours.Turn retort after solidification to enter
Row charing process, carbonization temperature is 900 DEG C.After circulation three times, extrudate density reaches 1.82g/cm3。
(6) product of acquisition is put into high temperature heat treatment furnace, at 2000 DEG C, whole process treatment 5 hours, use argon gas for
Protective gas, pressure is pressure-fired.
(7) C/C composites are carried out into milling and grinding, is cleaned through sonic oscillation, the C/C for obtaining final size is slided
Bar, specific performance parameter is shown in Table 1.
Embodiment 2：
It is 8 to use cloth felt ratio:2 2.5D Carbon fibes acupuncture entirety felt is precast body, by chemical vapor infiltration technique system
It is 1.51g/cm for density3C/C composites, by the dipping of resin twice-charring process, be prepared for density for 1.76g/
cm3C/C composites, by 2300 DEG C of high-temperature heat treatments and machining obtain C/C draw runners.
C/C pantographs draw runner in the present embodiment is mainly prepared by following steps：
(1) first, PAN types T700 (12K) Carbon fibe for being produced using toray company (Toray) is made net tire and nothing
Latitude cloth, it is ensured that laminated cloth is 8 with the mass ratio of net tire:2, by 0 ° of laminated cloth of individual layer, net plies, 90 ° of laminated cloths, net plies successively
Circulation superposition, then, using the method for relay-type acupuncture, to be made density be 0.35g/cm3Carbon fibe precast body, 1050*36*
25mm。
(2) use the graphite frock for designing by precast body under argon atmosphere, high-temperature heat treatment before carrying out 1600 DEG C,
All times 8 hours, protective atmosphere is argon gas, and pressure is pressure-fired (i.e. only slight beyond the scale of pressure vacuum gauge 0)；
(3) it is carbon-source gas to use natural gas, and hydrogen is carrier gas, and natural gas is 1 with the volume ratio of hydrogen:3, using heat
Graded chemical vapor infiltration method sinks to accumulating pyrolytic carbons to precast body at 950 DEG C, after depositing 100 hours, C/C composite densities
It is 0.85g/cm3, with length direction center line as axle, C/C composites is rotated by 90 °, redeposition is obtained density after 200 hours
It is 1.51g/cm3C/C composites；
(4) according to carbon draw runner size, every is left surplus 1mm, and the C/C composites of above-mentioned low-density are carried out into machinery adds
Work；
(5) the above-mentioned C/C draw runners for cutting into are put into vacuum-pressure impregnating autoclave using the graphite frock of design, with furan
Furane resins is impregnating agent, using high-pressure impregnation PROCESS FOR TREATMENT.Before dipping, sample should be preheated first, and dipping temperature is 60 DEG C, dipping pressure
Power is 2MPa, and the dwell time is 1.5 hours.Afterwards, 200 DEG C are warming up to, insulation is solidified for about 3 hours.Turn charing after solidification
Stove carries out charing process, and carbonization temperature is 850 DEG C.After circulation twice, extrudate density reaches 1.76g/cm3；
(6) product of acquisition is put into high temperature heat treatment furnace, at 2300 DEG C, whole process treatment 6 hours, use argon gas for
Protective gas；
(7) C/C composites are carried out into milling and grinding, obtains the C/C draw runners of final size, specific performance parameter is shown in
Table 1.
Embodiment 3：
It is 8 to use cloth felt ratio:2 2.5D Carbon fibes acupuncture entirety felt is precast body, by chemical vapor infiltration technique system
It is 1.65g/cm for density3C/C composites, by bituminizing-charring process twice, be prepared for density for 1.85g/
cm3C/C composites, by 2300 DEG C of high-temperature heat treatments and machining obtain C/C draw runners.
C/C pantographs draw runner in the present embodiment is mainly prepared by following steps：
(1) first, PAN types T700 (12K) Carbon fibe for being produced using toray company (Toray) is made net tire and nothing
Latitude cloth, it is ensured that laminated cloth is 8 with the mass ratio of net tire:2, by 0 ° of laminated cloth of individual layer, net plies, 90 ° of laminated cloths, net plies successively
Circulation superposition, then, using the method for relay-type acupuncture, to be made density be 0.56g/cm3Carbon fibe precast body, size is
1050*36*25mm。
(2) use the graphite frock for designing by precast body under argon atmosphere, high-temperature heat treatment before carrying out 1900 DEG C,
All times 10 hours, protective atmosphere is argon gas, and pressure is pressure-fired (i.e. only slight beyond the scale of pressure vacuum gauge 0)；
(3) it is carbon-source gas, hydrogen and the volume ratio that the mixed gas of nitrogen are carrier gas, hydrogen and nitrogen to use methane
It is 1:1, methane is 1 with the volume ratio of gaseous mixture:1, precast body is deposited at 850 DEG C using heat gradient chemical gaseous phase permeation method
Pyrolytic carbon, after 80 hours, C/C composite densities are 0.84g/cm to deposition3, with length direction center line as axle, C/C is combined
Material rotates 180 °, and after continuing to deposit 160 hours, density reaches 1.1g/cm3, it is machined, open material list face
Gap, it is 1.65g/cm that density is obtained after continuing to deposit 140 hours3C/C composites.
(4) according to carbon draw runner size, every is left surplus 1mm, and the C/C composites of above-mentioned low-density are carried out into machinery adds
Work.
(5) the above-mentioned C/C draw runners for cutting into are put into vacuum-pressure impregnating autoclave using the graphite frock of design, to change
Property coal tar pitch be impregnating agent, using high-pressure impregnation PROCESS FOR TREATMENT.Before dipping, sample should be preheated first, and dipping temperature is 180 DEG C, leaching
Stain pressure is 3MPa, and the dwell time is 3 hours.After being cooled to room temperature, turning retort carries out charing process, and carbonization temperature is 1000
℃.After impregnating once, to material at 2600 DEG C, argon atmosphere under the conditions of pressure-fired, is heat-treated.Afterwards, then impregnate
Once, extrudate density reaches 1.85g/cm3。
(6) product of acquisition is put into high temperature heat treatment furnace, at 2300 DEG C, whole process treatment 10 hours, using argon gas
It is protective gas.
(7) C/C composites are carried out into milling and grinding, obtains the C/C draw runners of final size, specific performance parameter is shown in
Table 1.
The test result of the pantograph carbon draw runner of table 1
The C/C draw runners for being prepared using the present invention as can be seen from Table 1, compared with existing Huffman SK980 products, resistance
Rate is significantly reduced, and impact flexibility is improved to 5~10 times；Compared with existing C/C draw runners, impact flexibility is improved to 2~4 times.
Claims (4)
1. a kind of pantograph preparation method of C/C composite draw runners, it is characterised in that comprise the steps：
Step one
By charcoal cloth and charcoal felt mass ratio 8：2, by 0 ° without latitude charcoal cloth, Carbon fibe net tire, 90 ° without latitude charcoal cloth, Carbon fibe net tire successively
After successively circulation superposition, the method for using relay-type acupuncture is 0.3 introduce Carbon fibe beam to be made density perpendicular to laying direction
~0.6g/cm3The acupuncture of 2.5D Carbon fibes entirety felt；The charcoal cloth is 0 ° of laminated cloth and 90 ° of laminated cloths；The charcoal felt is Carbon fiber
Dimension net tire；
Step 2
Step one gained Carbon fibe acupuncture entirety felt is clamped using graphite frock, it is fixed after carry out in the high temperature heat treatment furnace before
High-temperature heat treatment, obtains the overall felt after preceding high-temperature heat treatment；The condition of the preceding high-temperature heat treatment is：Temperature 1800-2000
DEG C, time 3-8 hours, protective atmosphere was argon gas atmosphere；
Step 3
Overall felt after high-temperature heat treatment before step 2 gained is carried out into chemical vapor deposition pyrolytic carbon treatment, depositing homogeneous are obtained
And density is 1.4~1.6g/cm3C/C composites；Its concrete operations is：
Overall felt after high-temperature heat treatment before step 2 gained is fixed in graphite frock, the graphite frock energy adjusting body felt
Angles and positions in cvd furnace；Using at least one as carbon-source gas in methane, propylene, natural gas, with nitrogen and/or
Hydrogen is 1 with the volume ratio of diluent gas as diluent gas, carbon-source gas:1~3, first deposition is for a period of time to the increasing of overall felt
Weigh 0.4~0.6g/cm3Afterwards；With length direction center line as axle, felt body is rotated, its anglec of rotation is 1-180 degree, continues to deposit
It is 1.4~1.6g/cm that density is obtained3C/C composites；It is 800~1100 DEG C that temperature is controlled during deposition；
Step 4
It is machined by the size of design draw runner, and polymer impregnated-charing process is carried out after reserved allowance, until
Density is obtained for 1.7~1.9g/cm3High density C/C composites；
Step 5
Under protective atmosphere, graphitization processing is carried out to step 4 gained high density C/C composites, during graphitization processing, control
Temperature processed is 1800~2600 DEG C；
Step 6
After being machined by the size of design draw runner, cleaning obtains finished product.
2. a kind of pantograph according to claim 1 preparation method of C/C composite draw runners, it is characterised in that；Step
In rapid three, condition during chemical vapor deposition pyrolytic carbon treatment is：
Carbon-source gas are selected from least one in methane, propylene, natural gas；
Diluent gas is nitrogen and/or hydrogen；
Carbon-source gas are 1 with the volume ratio of diluent gas:1~3；
Depositing temperature is 800~1100 DEG C；
Sedimentation time is 200~400 hours.
3. a kind of pantograph according to claim 1 preparation method of C/C composite draw runners, it is characterised in that：Step
Polymer impregnated-charing process is carried out in rapid four to be carried out after the composite after machining is gripped using graphite frock
Polymer impregnated-charing process；
When carrying out polymer impregnated-charing process, polymer used is resin or pitch；The resin is selected from furane resins, phenol
At least one in urea formaldehyde；
During impregnating resin, it is 1~3MPa for 50-170 DEG C, pressure to control temperature, and the single impregnation time is 1-5 hours；Single soaks
After the completion of stain resin, solidification 1-5 hours is carried out at 180-300 DEG C；At 800~1100 DEG C after solidification, charing 40-60 is carried out small
When, Carbonization Atmospheres are nitrogen；Repeated impregnations, solidification, charring process are until obtain density for 1.7~1.9g/cm3High density C/
C composite；
During impregnating pitch, it is 150-250 DEG C to control temperature, and pressure is 1~3MPa, and the single impregnation time is 1-5 hours；Single soaks
Charing 40-60 hours is carried out after stain pitch at 800~1100 DEG C, Carbonization Atmospheres are nitrogen；Repeated impregnations, charring process are until obtain
It is 1.7~1.9g/cm to density3High density C/C composites.
4. a kind of pantograph according to claim 1 preparation method of C/C composite draw runners, it is characterised in that：Step
In rapid five, atmosphere used by graphitization processing is selected from least one in argon gas atmosphere, nitrogen atmosphere；The time of graphitization processing is
3~10 hours.
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| CN105294139B (en) * | 2015-12-09 | 2018-05-18 | 杭州卓导新材料有限公司 | A kind of preparation method of low-resistivity C/C composite material carbon draw runners |
| CN105461340B (en) * | 2015-12-09 | 2018-02-06 | 杭州卓导新材料有限公司 | A kind of pantograph band cooling function C/C composite carbon slippers and preparation method thereof |
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| CN112091198A (en) * | 2020-08-10 | 2020-12-18 | 杭州卓导新材料有限公司 | Preparation method of novel carbon/carbon-copper composite material slide bar |
| CN112430116A (en) * | 2020-12-04 | 2021-03-02 | 西安美兰德新材料有限责任公司 | Preparation method of carbon/carbon composite material PECVD bearing frame |
| CN113292351B (en) * | 2021-04-25 | 2023-03-31 | 航天材料及工艺研究所 | Preparation method of quasi-isotropic carbon cloth needling carbon/carbon composite material |
| CN113292352B (en) * | 2021-04-30 | 2022-09-23 | 北京化工大学 | Preparation method of unidirectional high-thermal-conductivity carbon/carbon composite material |
| CN113277866B (en) * | 2021-04-30 | 2022-09-23 | 北京化工大学 | Preparation method of bidirectional high-thermal-conductivity carbon/carbon composite material |
| CN114920574A (en) * | 2022-06-07 | 2022-08-19 | 醴陵市东方电瓷电器有限公司 | Method for preparing large-size carbon-carbon crucible by three-dimensional weaving of carbon fibers |
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