Combined carbon-ceramic brake disc with mortise and tenon connection and method for manufacturing same

Abstract

The present application relates to a kind of mortise and tenon joint combined carbon ceramic brake disc and its preparation method, including first brake panel and second brake panel, on the opposite surface of first brake panel and second brake panel, respectively with annular array arrangement multiple first inserts and second inserts are provided, first insert and second insert are connected by mortise and tenon structure, and are combined to form the brake disc;Meanwhile, the preparation method of combined carbon ceramic brake disc is provided.The first brake panel and the second brake panel of the present application produce relative rotation torsion effect in work, and insert and mortise groove are the main load unit of torsion force, and the shear resistance is strong, mortise and tenon connection can also realize the accurate positioning of two brake faces, so that the two are quickly assembled, meanwhile, by structure disassembly, the product density uniformity is improved, the dynamic balance performance of carbon ceramic brake disc is improved, and the preparation method shortens the preparation period, and improves the qualified rate of product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon fiber toughened ceramic matrix composite brake disc, and particularly relates to a mortise and tenon connected combined carbon ceramic brake disc and a preparation method thereof. BACKGROUND

[0002] Continuous fiber reinforced ceramic matrix composites (CFCC) inherit the excellent characteristics of ceramics, such as low density, high strength and oxidation resistance, and overcome the weaknesses of ceramics, such as brittleness and poor reliability, and exhibit a fracture behavior similar to that of metals, and are not sensitive to cracks and are not prone to catastrophic fracture, thus having great application potential in the field of friction braking. C / SiC composite material has a series of excellent performances, such as high specific strength, high specific modulus, high hardness, low density, small friction coefficient thermal and humidity recession, and is one of the most potential friction materials at present.

[0003] The preparation process of C / SiC composite material can be divided into: gas phase approach, also known as chemical vapor infiltration (CVI); liquid phase approach, including polymer impregnation pyrolysis (PIP) and liquid silicon infiltration (LSI) or reaction melt infiltration process (RMI). Using gas phase approach, different components of the composite material, i.e. interface phase, matrix and outer coating, can be continuously deposited from gaseous precursors at medium temperature of 900-1000℃ under low or normal pressure. The initial material is a porous fiber preform with n (usually n=2 or 3) dimensions. During the preform densification process (CVI), the interface phase and SiC matrix are deposited to the fiber surface inside the preform pores. The CVI process is a mature process for preparing SiC-based composite materials, which has the following outstanding advantages: strong practicability, relatively low preparation temperature; effective realization of component design of composite materials in micro size; suitable for preparing products with high fiber volume fraction, complex shape, net size and wide size range; and small damage to fibers during preparation process. The RMI process is a densification process for in-situ generation of matrix through chemical reaction, and the reaction product is usually carbide and boride. Its principle is to introduce carbide and boride by reacting high-temperature molten metal or alloy mixture with porous material containing carbon or boron. No additional mechanical pressure is needed during the RMI process, and the molten metal or alloy spontaneously infiltrates into the preform under the action of capillary force, reacts with carbon or introduced precursors to generate ceramic matrix. The carbon or precursor in the porous material can be derived from the preform matrix itself (such as C / C composite material), or the carbon phase can be introduced into the porous preform by slurry impregnation or PIP method. Compared with the CVI process, the RMI process has low preparation cost, short production cycle and can realize the preparation of complex shape components; and the prepared material has low residual porosity and good densification. However, the RMI process also has some disadvantages: during the impregnation reaction process, if no protection is taken, the carbon fiber will react with the infiltrated metal phase, corrode and damage the fiber, affecting the mechanical properties of the material. In addition, the unreacted metal remaining in the material will accelerate creep at high temperature, destroy the phase stability and reduce the performance of the material.

[0004] The traditional monolithic carbon ceramic brake disc is arranged with multiple ventilation grooves in the circumferential direction to reduce weight and dissipate heat. However, when the density of the brake disc blank is low, the ventilation groove machining cannot be performed. The ventilation groove machining can be performed only when the brake disc blank has a certain strength and processability. Moreover, the machining of the ventilation groove takes a lot of time, and the removed material is all corner material, causing a waste of a large amount of manpower, material and time. Meanwhile, since the thickness of the monolithic carbon ceramic brake disc is relatively thick, generally 25-40 mm, and there are different structures in the thickness direction of the carbon ceramic brake disc, such as mounting hole steps and ventilation grooves, the melt infiltration process is complex and difficult to control, which leads to the problem of uneven density of the carbon ceramic brake disc blank after RMI modification. This directly leads to the excess of the remaining unbalance amount of the carbon ceramic brake disc and the scrapping of the product.

[0005] In order to overcome the process defects of the integral carbon-toughened brake disc, a combined carbon-toughened brake disc is developed in the prior art, which is divided into two halves in the thickness direction, and the circumferential machining of the ventilation groove is changed to single-sided milling in the plane of the brake disc, greatly shortening the machining time and reducing the machining difficulty. After machining, the two halves of the brake disc are riveted or screwed into a whole by mechanical connecting members such as rivets and screws. Therefore, when the two halves of the brake disc generate relative rotational torsional load during use, the mechanical connecting members are the main units of the load, and the shear strength directly determines the mechanical properties of the brake disc. However, due to the limited installation area on the brake disc, the diameter, number and arrangement of the mechanical connecting members are limited. Once a rivet is damaged during use, the overall performance of the brake disc will be greatly reduced. SUMMARY

[0006] In view of the deficiencies in the prior art, the present application provides a mortise and tenon connected combined carbon-toughened brake disc and a preparation method thereof, which solves the problem of low shear strength of the existing combined carbon-toughened brake disc connected by rivets.

[0007] To achieve the above object, the technical scheme adopted by the present application is as follows:

[0008] A mortise and tenon connected combined carbon-toughened brake disc, comprising a first brake panel and a second brake panel, a plurality of first inserts and second inserts are arranged in an annular array on the opposite faces of the first brake panel and the second brake panel, the first inserts and the second inserts are connected by a mortise and tenon structure, and the brake disc is formed by combination; a central hole for mounting a joint is formed in the middle of the first brake panel.

[0009] In the present application, the first brake panel and the second brake panel are connected by a mortise and tenon structure, which can bear higher shear force and has strong shear resistance compared with the brake disc connected by rivets. In addition, the mortise and tenon connection method can also realize precise positioning of the first brake panel and the second brake panel, enabling them to be quickly assembled.

[0010] Further, the mortise and tenon structure comprises mortise and tenon bodies, the number of the mortise and tenon bodies is equal to the number of the first inserts and the second inserts; a first mortise is formed on one side of the mortise and tenon body corresponding to the first insert, and a second mortise is formed on one side of the mortise and tenon body corresponding to the second insert, the first insert is embedded in the first mortise, and the second insert is embedded in the second mortise.

[0011] Further, the first mortise gradually decreases in width along the direction of rotation of the first insert into the first mortise, and the second mortise gradually decreases in width along the direction of rotation of the second insert into the second mortise; the rotation direction of the first insert into the first mortise is opposite to the rotation direction of the second insert into the second mortise.

[0012] In the present scheme, the first and second inserts on the first and second brake panels are respectively embedded in the first and second mortise and tenon slots on both sides of the mortise and tenon body, and when the first and second brake panels generate relative rotational torsion during operation, the first insert and the first mortise slot, and the second insert and the second mortise slot are the main load-bearing units of the torsion force, which can bear higher shear force and have strong shear resistance compared with the brake disc connected by rivets; through the mortise and tenon structure connection, the precise positioning of the first and second brake panels can be realized, and the two can be quickly assembled. Rivets or bolts are not needed for connection, and assembly is convenient.

[0013] Further, the groove walls on both sides of the first and second mortise and tenon slots are inclined to the bottom of the mortise and tenon body, and the angle θ between the groove wall and the bottom of the mortise and tenon body ranges from 60 to 89 degrees.

[0014] Further, the thickness of the combined carbon-ceramic brake disc is 20-48 mm, and the outer diameter is 260-460 mm; the thickness of the mortise and tenon body is 1 / 6-1 / 2 of the thickness of the combined carbon-ceramic brake disc; the mortise and tenon depth of the first and second mortise and tenon slots is 1 / 8-1 / 2 of the thickness of the mortise and tenon body.

[0015] Further, the first brake panel is provided with installation through holes equal in number to the mortise and tenon bodies, and the mortise and tenon body is provided with bolt holes, and the first brake panel and the mortise and tenon body are connected by bolts penetrating the installation through holes and the bolt holes.

[0016] In the present scheme, the first brake panel and the mortise and tenon bodies are connected into a whole by bolts, thereby strengthening the connection strength of the first brake panel and the mortise and tenon bodies.

[0017] In a second aspect, the present application provides a preparation method of the mortise and tenon connected combined carbon-ceramic brake disc provided in the first aspect, which comprises the following steps:

[0018] S1: preparing a three-dimensional needle-punched preform flat plate;

[0019] S2: preparing a pyrolytic carbon interface layer on the surface of the three-dimensional needle-punched preform flat plate by using a CVI process;

[0020] S3: introducing carbon into the inside of the three-dimensional needle-punched preform flat plate by using a PIP process;

[0021] S4: mechanically processing the three-dimensional needle-punched preform flat plate after the carbon is introduced, to obtain a first brake panel connected with a first insert, a second brake panel connected with a second insert, and a mortise and tenon body;

[0022] S5: rotating the first brake panel along the side of the mortise groove body with the first mortise groove, so that the first inlay is embedded in the first mortise groove; rotating the second brake panel along the side of the mortise groove body with the second mortise groove in the opposite direction, so that the second inlay is embedded in the second mortise groove, to obtain an assembled body of the combined carbon-toughened brake disc;

[0023] S6: performing RMI process treatment on the assembled body of the combined carbon-toughened brake disc.

[0024] In the scheme, a pyrolytic carbon interface layer is prepared by a CVI gas deposition process, then a resin is introduced into the porous three-dimensional needle-punched preform flat plate by a PIP precursor impregnation and pyrolysis process, and excess carbon is generated by pyrolysis; the first brake panel and the second brake panel processed are then riveted and assembled; finally, RMI reaction is performed to obtain a combined carbon-toughened brake disc with high density.

[0025] Further, in S1, the three-dimensional needle-punched preform flat plate is prepared by a needle-punching process from carbon fiber no-woven cloth or carbon fiber webbing, and the volume density of the three-dimensional needle-punched preform flat plate is 0.35-0.65 g / cm 3 ;

[0026] wherein the fiber tows of the carbon fiber no-woven cloth are 3000, 6000, 12000 or 24000; and the density of the carbon fiber webbing ranges from 25 to 80 g / m 2 .

[0027] Further, S2 includes:

[0028] S201: placing the three-dimensional needle-punched preform flat plate in the hearth of the vacuum induction furnace;

[0029] S202: starting the vacuum pump to perform vacuumization on the inside of the hearth, and when the vacuum degree inside the hearth is ≤200 Pa, starting to increase the temperature, and increasing the temperature inside the hearth from room temperature to 700-900 ℃ at a rate of 3-5 ℃ / min;

[0030] S203: introducing propylene, hydrogen and argon into the hearth in a ratio of 1:3:3 according to the gas flow ratio, and keeping the temperature for 100-200 h, so that the propylene gas is decomposed by heat, and a pyrolytic carbon interface layer is deposited on the surface of the three-dimensional needle-punched preform flat plate;

[0031] S204: after the temperature keeping is completed, starting to decrease the temperature, so that the temperature inside the hearth decreases to room temperature.

[0032] In the scheme, the three-dimensional needle-punched preform flat plate material is densified by the CVI process through the decomposition and polycondensation of hydrocarbon gas compounds at high temperature to deposit carbon inside the porous medium.

[0033] Further, S3 includes:

[0034] S301: Place the three-dimensional needle-punched preform plate into the impregnation tank; start the vacuum pump to evacuate the inside of the impregnation tank, and when the air pressure inside the impregnation tank reaches -0.5~-0.1MPa, maintain the pressure for 30 minutes.

[0035] S302: After the pressure holding period, the resin slurry is drawn into the impregnation tank using the negative pressure inside the impregnation tank; after the resin slurry submerges the three-dimensional needled preform plate, the impregnation tank is pressurized. When the internal pressure of the impregnation tank reaches 1.0~3.0MPa, it is held at this pressure for 30 minutes to allow the resin slurry to enter the interior of the three-dimensional needled preform plate and decompose into carbon inside the three-dimensional needled preform plate; after the pressure holding period, the pressure is restored to normal, and the three-dimensional needled preform plate is removed from the impregnation tank.

[0036] S303: Place the three-dimensional needle-punched preform plate into an oven at a temperature of 80~250°C for curing;

[0037] S304: After curing, the three-dimensional needle-punched preform plate is sent into the furnace chamber of the vacuum induction furnace; the vacuum pump is started to evacuate the inside of the furnace chamber. When the vacuum degree inside the furnace chamber is ≤200Pa, the temperature is raised from room temperature to 700~900℃ at a rate of 3~5℃ / min, and held at this temperature for 2~4 hours; after the holding time is completed, the temperature is lowered to room temperature.

[0038] Furthermore, S6 specifically includes:

[0039] S601: Place the assembly of the combined carbon ceramic brake disc into a graphite crucible, add silicon powder to the graphite crucible, and then send the graphite crucible into the furnace chamber of the vacuum induction furnace.

[0040] S602: Start the vacuum pump to evacuate the furnace. When the vacuum level inside the furnace is ≤200Pa, start heating. Raise the temperature inside the furnace from room temperature to 1400±50℃ at a rate of 3~5℃ / min, and keep it at this temperature for 1 hour.

[0041] S603: Raise the internal temperature of the furnace to 1500℃ at a rate of 2-3℃ / min, and hold at 1500℃ for 1 hour;

[0042] S604: Continue to raise the internal temperature of the furnace from 1500℃ to 1600℃ at a rate of 2-3℃ / min, and hold at 1600℃ for 0.5-1h; after holding, lower the internal temperature of the furnace to room temperature, and remove the graphite crucible to obtain the combined carbon ceramic brake disc.

[0043] In this scheme, molten silicon is introduced into the interior of the composite carbon-ceramic brake disc material to obtain a composite carbon-ceramic brake disc with higher density, which can better utilize the load-bearing capacity of the internal carbon fibers.

[0044] The beneficial effects of the present application are:

[0045] 1. The combined carbon ceramic brake disc provided by the present application is designed to be processed separately into a first brake panel and a second brake panel, and the two panels are connected through a mortise and tenon structure to form a ventilation gap in the circumferential direction, thereby solving the problem of time-consuming, labor-intensive and material-wasting in processing a ventilation groove of a traditional integral carbon ceramic brake disc. In the present application, the traditional integral carbon ceramic brake disc with a relatively large thickness is disassembled into multiple parts, which improves the utilization rate of materials and allows each part to be prepared in large quantities, thereby being suitable for mass production and reducing the process difficulty caused by the uneven density of the carbon matrix and the uneven density of the ceramic phase after high-temperature modification due to the thickness of the preform.

[0046] The quality of each mortise and tenon body can be screened before assembly, the quality fluctuation range of the mortise and tenon body is controlled, and the quality consistency of each mortise and tenon body before assembly is ensured, thereby improving the uniformity of the carbon ceramic brake disc product, further improving the dynamic balance performance of the carbon ceramic brake disc product, effectively reducing the problem of dynamic imbalance exceeding the tolerance of the carbon ceramic brake disc product caused by the weight deviation, reducing the processing amount of dynamic balance weight removal, saving material and processing cost, shortening the preparation period, and improving the first-time qualification rate of the product.

[0047] 2. The first brake panel and the second brake panel are connected through a mortise and tenon structure, and compared with a brake disc connected through rivets, the force receiving unit is improved from a rivet to a reliable mortise and tenon structure, the advantages of high hardness and compression resistance of ceramic are fully utilized, the connection reliability of the combined brake disc is improved, and the shear resistance of the combined carbon ceramic brake disc is improved.

[0048] 3. The first mortise and the second mortise on the two sides of the mortise and tenon body in the mortise and tenon structure are opposite in the direction of rotation and closing, the outer side cross section of the mortise is large, and the inner side cross section of the groove is small, thereby ensuring that the first brake panel and the second brake panel can be assembled by rotation, positioning is reliable, and operation is simple. The included angle between the side surface and the bottom surface of the first mortise and the second mortise is an acute angle, the two brake panels are not separated and fallen off after being connected, and the subsequent process and product use requirements can be met.

[0049] 4. The preparation method of the combined carbon ceramic brake disc provided by the present application adopts a CVI gas deposition process to prepare a porous three-dimensional needle-punched preform flat plate material with a certain density, then adopts a PIP precursor impregnation and pyrolysis process to introduce resin into the three-dimensional needle-punched preform flat plate to pyrolyze excess carbon, and finally performs an RMI reaction to introduce a molten silicon melt into the three-dimensional needle-punched preform flat plate material, thereby obtaining a combined carbon ceramic brake disc with high density. The pre-deposited PyC matrix can effectively protect the carbon fibers, and the carbon fibers will not be corroded by the Si melt during the RMI reaction process, so that the load capacity of the carbon fibers can be better utilized. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 A structure diagram of a mortise and tenon joint combined carbon ceramic brake disc of the present application;

[0051] Figure 2 An exploded view of a mortise and tenon joint combined carbon ceramic brake disc of the present application;

[0052] Figure 3 A cross-sectional structure diagram of a mortise and tenon joint combined carbon ceramic brake disc of the present application;

[0053] Figure 4 A structure diagram of a mortise and tenon joint combined carbon ceramic brake disc of the present application;

[0054] Figure 5 A structure diagram of a mortise and tenon joint combined carbon ceramic brake disc of the present application;

[0055] Figure 6 A structure diagram of a mortise and tenon joint combined carbon ceramic brake disc of the present application;

[0056] Figure 7 A structure diagram of a mortise and tenon joint combined carbon ceramic brake disc of the present application;

[0057] In the figure: 1, first brake panel; 11, mounting through hole; 2, second brake panel; 3, mortise and tenon joint; 31, first mortise and tenon joint; 32, second mortise and tenon joint; 33, bolt hole; 4, first insert; 5, second insert. DETAILED DESCRIPTION

[0058] The principles and features of the present application are described below in conjunction with the accompanying drawings; the examples are only used to explain the present application; and are not used to limit the scope of the present application.

[0059] Example 1:

[0060] A mortise and tenon joint combined carbon ceramic brake disc, comprising a first brake panel 1 and a second brake panel 2, a plurality of first inserts 4 and second inserts 5 are arranged in a ring array on the opposite faces of the first brake panel 1 and the second brake panel 2, the first inserts 4 and the second inserts 5 are connected by a mortise and tenon structure to form a brake disc; a center hole for mounting a joint head is opened in the middle of the first brake panel 1.

[0061] The mortise and tenon structure comprises a mortise and tenon joint 3, the number of the mortise and tenon joint 3 is equal to the number of the first inserts 4 and the second inserts 5; a first mortise and tenon joint 31 is opened on the side corresponding to the first insert 4, and a second mortise and tenon joint 32 is opened on the side corresponding to the second insert 5, the first insert 4 is embedded in the first mortise and tenon joint 31, and the second insert 5 is embedded in the second mortise and tenon joint 32;

[0062] The first mortise groove 31 gradually decreases in groove width in the direction of rotation of the first mortise groove 31 along the first insert 4, and the second mortise groove 32 gradually decreases in groove width in the direction of rotation of the second mortise groove 32 along the second insert 5. The rotation direction of the first insert 4 into the first mortise groove 31 is opposite to the rotation direction of the second insert 5 into the second mortise groove 32.

[0063] The groove walls on both sides of the first mortise groove 31 and the second mortise groove 32 are inclined to the groove bottom, and the included angle θ between the groove wall and the groove bottom is 60-89°.

[0064] The thickness of the combined carbon-toughened brake disc is 20-48 mm, and the outer diameter is 260-460 mm. The thickness of the mortise groove body 3 is 1 / 6-1 / 2 of the thickness of the combined carbon-toughened brake disc. The mortise groove depth of the first mortise groove 31 and the second mortise groove 32 is 1 / 8-1 / 2 of the thickness of the mortise groove body 3.

[0065] The first brake panel 1 is provided with installation through holes 11 equal in number to the mortise groove body 3. The mortise groove body 3 is provided with bolt holes 33. The first brake panel 1 is connected with the mortise groove body 3 through bolts penetrating the installation through holes 11 and the bolt holes 33.

[0066] As a preferred embodiment, the number of mortise groove bodies 3, first inserts 4 and second inserts 5 is 4-20.

[0067] Embodiment 2:

[0068] As shown in Figures 1-7 , the present embodiment provides a preparation method of the mortise-and-tenon connected combined carbon-toughened brake disc based on the mortise-and-tenon connected combined carbon-toughened brake disc provided in Embodiment 1, comprising the following steps:

[0069] S1: preparing a three-dimensional needle-punched preform flat plate;

[0070] The carbon fiber no-woven cloth or carbon fiber web is prepared into a three-dimensional needle-punched preform flat plate through a needle-punching process. The volume density of the three-dimensional needle-punched preform flat plate ranges from 0.35 to 0.65 g / cm 3 . The fiber tows of the carbon fiber no-woven cloth are 3000, 6000, 12000 or 24000. The density of the carbon fiber web ranges from 25 to 80 g / m 2 .

[0071] S2: preparing a pyrolytic carbon interface layer on the surface of the three-dimensional needle-punched preform flat plate by a CVI process; specifically comprising:

[0072] S201: placing the three-dimensional needle-punched preform flat plate on the bottom plate of a vacuum induction furnace, and sending the flat plate into the furnace chamber through a lifting platform;

[0073] S202: Start the vacuum pump to vacuum the inside of the furnace, when the vacuum degree of the inside of the furnace is ≤200Pa, start the power supply, start to heat, increase the temperature of the inside of the furnace from room temperature to 700-900℃ at a rate of 3-5℃ / min;

[0074] S203: Introduce propylene, hydrogen and argon into the furnace in a ratio of 1:3:3, and keep the temperature for 100-200h, so that the propylene gas is heated and decomposed, and a pyrolytic carbon interface layer is deposited on the surface of the three-dimensional needle-punched preform flat plate;

[0075] S204: After the heat preservation is completed, the power supply is turned off, and the temperature of the inside of the furnace is decreased to room temperature.

[0076] S3: Introduce carbon into the three-dimensional needle-punched preform flat plate by PIP process; specifically including:

[0077] S301: Place the three-dimensional needle-punched preform flat plate in the bottom tray of the impregnation tank, close the tank door; start the vacuum pump to vacuum the inside of the impregnation tank, when the air pressure in the inside of the impregnation tank reaches-0.5--0.1MPa, keep the pressure at this air pressure for 30min;

[0078] S302: After the pressure keeping is completed, the resin slurry is sucked into the impregnation tank by the negative pressure in the inside of the impregnation tank; after the resin slurry submerges the three-dimensional needle-punched preform flat plate, start to pressurize the inside of the impregnation tank, when the air pressure in the inside of the impregnation tank reaches 1.0-3.0MPa, keep the pressure at this air pressure for 30min, so that the resin slurry enters the inside of the three-dimensional needle-punched preform flat plate and is cracked into carbon in the inside of the three-dimensional needle-punched preform flat plate; after the pressure keeping is completed, restore the normal pressure, and take out the three-dimensional needle-punched preform flat plate from the impregnation tank;

[0079] The resin slurry is made by mixing resin and resin dispersion reagent; wherein, the resin includes but is not limited to phenolic resin, epoxy resin, polyester resin, furan resin, furfural resin and combined resin thereof, and the resin dispersion solvent includes but is not limited to methanol, ethanol, acetone and mixed solvent thereof; the mass fraction of the resin slurry ranges from 30% to 60%;

[0080] S303: Place the three-dimensional needle-punched preform flat plate into an oven with a temperature of 80-250° for curing;

[0081] S304: After curing, place the three-dimensional needle-punched preform flat plate on the bottom tray of the vacuum induction furnace, and send the flat plate into the furnace by the lifting platform; start the vacuum pump to vacuum the inside of the furnace, when the vacuum degree of the inside of the furnace is ≤200Pa, start the power supply, start to heat, increase the temperature of the inside of the furnace from room temperature to 700-900℃ at a rate of 3-5℃ / min, and keep the temperature at this temperature for 2-4h; after the heat preservation is completed, start to decrease the temperature, and decrease the temperature of the inside of the furnace to room temperature, and take out the three-dimensional needle-punched preform flat plate.

[0082] S4: Mechanically process the three-dimensional needled preform plate after the carbon is introduced, to obtain the first brake panel 1 connected with the first insert 4, the second brake panel 2 connected with the second insert 5, and the mortise and tenon body 3.

[0083] S5: Rotate the first brake panel 1 with the first insert 4 along the side of the mortise and tenon body 3 with the first mortise 31, so that the first insert 4 is embedded in the first mortise 31; see Figure 7 , Figure 7 S5: Rotate the first brake panel 1 with the first insert 4 along the side of the mortise and tenon body 3 with the first mortise 31, so that the first insert 4 is embedded in the first mortise 31; see

[0084] S5: Rotate the first brake panel 1 with the first insert 4 along the side of the mortise and tenon body 3 with the first mortise 31, so that the first insert 4 is embedded in the first mortise 31; see Figure 7 S5: Rotate the first brake panel 1 with the first insert 4 along the side of the mortise and tenon body 3 with the first mortise 31, so that the first insert 4 is embedded in the first mortise 31; see Figure 7 S5: Rotate the first brake panel 1 with the first insert 4 along the side of the mortise and tenon body 3 with the first mortise 31, so that the first insert 4 is embedded in the first mortise 31; see

[0085] S6: Perform RMI process on the assembled body of the combined carbon-ceramic brake disc, specifically including:

[0086] S601: Place the assembled body of the combined carbon-ceramic brake disc into a graphite crucible, and add silicon powder into the graphite crucible; then place the graphite crucible on the bottom plate of a vacuum induction furnace, and use the lifting platform to send the preform and the crucible into the furnace chamber; the purity of the silicon powder ranges from 98% to 99.9%, and the mesh size ranges from 60 to 500;

[0087] S602: Start the vacuum pump to pump the inside of the furnace chamber, and when the vacuum degree inside the furnace chamber is ≤200 Pa, start the power supply and begin heating, at a rate of 3-5 ℃ / min, to raise the temperature inside the furnace chamber from room temperature to 1400±50 ℃, and maintain the temperature for 1 h;

[0088] S603: Continue to raise the temperature inside the furnace chamber to 1500 ℃ at a rate of 2-3 ℃ / min, and maintain the temperature at 1500 ℃ for 1 h;

[0089] S604: Continue to raise the temperature inside the furnace chamber from 1500 ℃ to 1600 ℃ at a rate of 2-3 ℃ / min, and maintain the temperature at 1600 ℃ for 0.5-1 h; after the heat preservation is completed, turn off the power supply, cool the temperature inside the furnace chamber to room temperature, and take out the graphite crucible; obtain the combined carbon-ceramic brake disc.

[0090] S7: Size the combined carbon-ceramic brake disc to obtain the combined carbon-ceramic brake disc product.

[0091] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mortise-joined combined carbon-carbide brake disc, characterized in that, The application relates to a combined carbon-toughened brake disc, which comprises a first brake panel (1) and a second brake panel (2), a plurality of first inserts (4) and a plurality of second inserts (5) are arranged in annular arrays on the opposite surfaces of the first brake panel (1) and the second brake panel (2) respectively, the first inserts (4) and the second inserts (5) are connected through a mortise-and-tenon structure to form the brake disc, and a central hole for mounting a joint is formed in the middle of the first brake panel (1). The mortise-and-tenon structure comprises mortise-and-tenon bodies (3), the number of the mortise-and-tenon bodies (3) is equal to the number of the first inserts (4) and the second inserts (5), a first mortise (31) is formed on the side corresponding to the first inserts (4) of the mortise-and-tenon body (3), a second mortise (32) is formed on the side corresponding to the second inserts (5) of the mortise-and-tenon body (3), the first inserts (4) are embedded into the first mortises (31), and the second inserts (5) are embedded into the second mortises (32). The width of the first mortises (31) gradually decreases along the direction in which the first inserts (4) rotate into the first mortises (31), the width of the second mortises (32) gradually decreases along the direction in which the second inserts (5) rotate into the second mortises (32), the rotating direction of the first inserts (4) into the first mortises (31) is opposite to the rotating direction of the second inserts (5) into the second mortises (32). The groove walls on both sides of the first mortises (31) and the second mortises (32) are inclined to the groove body bottom, and the included angle theta between the groove wall and the groove body bottom is 60-89 degrees. The combined carbon-toughened brake disc connected through the mortise-and-tenon structure is prepared through the following preparation method, and the specific steps comprise the following steps: S1: preparing a three-dimensional needle-punched preform flat plate; S2: preparing a pyrolytic carbon interface layer on the surface of the three-dimensional needle-punched preform flat plate through a chemical vapor infiltration process; S3: introducing carbon into the three-dimensional needle-punched preform flat plate through a polymer impregnation pyrolysis process; S4: performing mechanical processing on the three-dimensional needle-punched preform flat plate after the carbon is introduced, so as to obtain the first brake panel (1) connected with the first inserts (4), the second brake panel (2) connected with the second inserts (5) and the mortise-and-tenon body (3); S5: rotating the first brake panel (1) along the side of the mortise-and-tenon body (3) provided with the first mortises (31) so that the first inserts (4) are embedded into the first mortises (31); rotating the second brake panel (2) along the side of the mortise-and-tenon body (3) provided with the second mortises (32) in the opposite direction so that the second inserts (5) are embedded into the second mortises (32), thereby obtaining an assembly of the combined carbon-toughened brake disc; S6: performing a reaction melt infiltration process on the assembly of the combined carbon-toughened brake disc to perform a melt infiltration chemical reaction.

2. The mortise and tenon jointed modular carbon-carbide brake disc of claim 1, wherein, The thickness of the combined carbon-toughened brake disc is 20-48 mm, and the outer diameter is 260-460 mm; the thickness of the mortise-and-tenon body (3) is 1 / 6-1 / 2 of the thickness of the brake disc; the mortise depth of the first mortises (31) and the second mortises (32) is 1 / 8-1 / 2 of the thickness of the mortise-and-tenon body (3).

3. The mortise and tenon jointed modular carbon-carbide brake disc of claim 1, wherein, The first brake panel (1) is provided with installation through holes (11) equal in number to the tenon and groove bodies (3), the tenon and groove bodies (3) are provided with bolt holes (33), and the first brake panel (1) is connected with the tenon and groove bodies (3) through bolts penetrating the installation through holes (11) and the bolt holes (33).

4. The mortise and tenon jointed modular carbon-carbide brake disc of claim 1, wherein, In the S1, the carbon fiber unidirectional fabric or carbon fiber web is prepared into a three-dimensional needle punched preform plate through a needle punching process, and the volume density of the three-dimensional needle punched preform plate is 0.35~0.65g / cm 3 ; The carbon fiber veil has a fiber tows of 3000, 6000, 12000 or 24000, and a density of 25-80 g / m 2 .

5. The mortise and tenon jointed, modular carbon-carbide brake disc of claim 1, wherein, The S2 comprises: S201: placing a three-dimensional needle-punched preform flat plate in a hearth of a vacuum induction furnace; S202: starting a vacuum pump to perform vacuumization on the inside of the hearth, when the vacuum degree of the inside of the hearth is less than or equal to 200 Pa, starting to increase the temperature, and increasing the temperature of the inside of the hearth from room temperature to 700-900 ℃ at a rate of 3-5 ℃ / min; S203: introducing propylene, hydrogen and argon into the hearth at a ratio of 1:3:3 of airflow ratio, and keeping the temperature for 100-200 h, so that the propylene gas is decomposed by heat and a pyrolytic carbon interface layer is deposited on the surface of the three-dimensional needle-punched preform flat plate; S204: after the temperature keeping is completed, starting to decrease the temperature, and decreasing the temperature of the inside of the hearth to room temperature.

6. The mortise and tenon jointed, modular carbon-carbide brake disc of claim 1, wherein, The S3 comprises: S301: placing a three-dimensional needle-punched preform flat plate in an impregnation tank, and starting a vacuum pump to perform vacuumization on the inside of the impregnation tank, when the air pressure of the inside of the impregnation tank reaches-0.5 to-0.1 MPa, keeping the pressure at the air pressure for 30 min; S302: after the pressure keeping is completed, using the negative pressure of the inside of the impregnation tank to suck resin slurry into the impregnation tank, after the resin slurry submerges the three-dimensional needle-punched preform flat plate, starting to pressurize the inside of the impregnation tank, when the air pressure of the inside of the impregnation tank reaches 1.0-3.0 MPa, keeping the pressure at the air pressure for 30 min, so that the resin slurry enters the inside of the three-dimensional needle-punched preform flat plate and is cracked into carbon in the inside of the three-dimensional needle-punched preform flat plate, after the pressure keeping is completed, restoring the normal pressure, and taking out the three-dimensional needle-punched preform flat plate from the impregnation tank; S303: placing the three-dimensional needle-punched preform flat plate into an oven with a temperature of 80-250 ° to perform curing; S304: after the curing, sending the three-dimensional needle-punched preform flat plate into the hearth of the vacuum induction furnace, starting a vacuum pump to perform vacuumization on the inside of the hearth, when the vacuum degree of the inside of the hearth is less than or equal to 200 Pa, starting to increase the temperature, and increasing the temperature of the inside of the hearth from room temperature to 700-900 ℃ at a rate of 3-5 ℃ / min, and keeping the temperature at the temperature for 2-4 h; after the temperature keeping is completed, starting to decrease the temperature, and decreasing the temperature of the inside of the hearth to room temperature.

7. The mortise and tenon jointed modular carbon-carbide brake disc of any of claims 1-6, wherein, The S6 comprises: S601: placing the assembly of the combined carbon-toughened brake disc into a graphite crucible, adding silicon powder into the graphite crucible, and then sending the graphite crucible into the hearth of a vacuum induction furnace; S602: starting a vacuum pump to perform vacuumization on the inside of the hearth, when the vacuum degree of the inside of the hearth is less than or equal to 200 Pa, starting to increase the temperature, and increasing the temperature of the inside of the hearth from room temperature to 1400±50 ℃ at a rate of 3-5 ℃ / min, and keeping the temperature at the temperature for 1 h; S603: further increasing the temperature of the inside of the hearth to 1500 ℃ at a rate of 2-3 ℃ / min, and keeping the temperature at 1500 ℃ for 1 h; S604: continuously increasing the temperature of the inside of the hearth from 1500 ℃ to 1600 ℃ at a rate of 2-3 ℃ / min, and keeping the temperature at 1600 ℃ for 0.5-1 h; After holding temperature, the temperature of the furnace is decreased to room temperature, and the graphite crucible is taken out, to obtain the combined carbon ceramic brake disc.

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