Ceramic brake disc, method for machining a ceramic brake disc, and vehicle

Abstract

The application relates to the field of vehicles and discloses a ceramic brake disc, a processing method of the ceramic brake disc and a vehicle. The ceramic brake disc comprises a ceramic brake disc body, a plurality of threaded holes are formed in the ceramic brake disc body, the ceramic brake disc further comprises a plurality of studs, and the studs are arranged in the threaded holes. The processing method comprises the following steps: forming a plurality of threaded holes in a preform of the ceramic brake disc body; and screwing the studs in the threaded holes. In the ceramic brake disc, a plurality of threaded holes are formed in the ceramic brake disc body, and the threaded holes are provided with the studs; the combined parts of the base material of the ceramic brake disc body are mutually engaged under the action of the studs to obtain reinforcement, thereby meeting the shear strength requirement; the ceramic brake disc does not need to be needled or the needling density is reduced to meet the shear strength requirement of the ceramic brake disc, damage to fibers in the needling process is avoided or reduced, and the strength of the ceramic brake disc is increased.

Description

Ceramic brake discs, their manufacturing process, and related vehicles. Technical Field

[0001] This invention relates to the field of vehicles, and more specifically to a ceramic brake disc, a method for processing the ceramic brake disc, and a vehicle. Background Technology

[0002] Ceramic brake discs are reinforced composite ceramics synthesized from carbon fiber and silicon carbide at high temperatures. Ceramic brake discs effectively and stably resist heat fade, exhibiting heat resistance many times higher than ordinary brake discs. They are lightweight and offer superior high-temperature braking performance, making them widely used.

[0003] Traditional ceramic brake discs are manufactured by stacking substrates, then treating the substrates with a needle-punching process, followed by subsequent carbonization and chemical vapor deposition. In this method, the needle-punching density needs to be 200-300 needles / cm². 2 The high needle density results in greater damage to the fibers during the needle-punching process. At the same time, the bonding force between the fibers hooked down by the needle and the preform is weak, resulting in low shear strength of the sample after silicon infiltration. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, the present invention provides a ceramic brake disc, a method for processing a ceramic brake disc, and a vehicle.

[0005] The present invention provides a ceramic brake disc, including a ceramic brake disc body, the ceramic brake disc body including a substrate, the ceramic brake disc body having a plurality of threaded holes, the axis of the threaded holes forming an angle with the plane of the substrate, the ceramic brake disc also including a plurality of studs, the studs corresponding one-to-one with the threaded holes, and the studs being disposed in the threaded holes.

[0006] Optionally, the angle between the axis of the threaded hole and the plane of the substrate is 90°.

[0007] Optionally, the angle between the axis of the threaded hole and the plane of the substrate is 45-90°.

[0008] Optionally, the multiple threaded holes may extend in the same or different directions.

[0009] Optionally, the substrate includes a mesh layer and a continuous fiber layer, wherein there are multiple mesh layers and multiple continuous fiber layers, and the multiple mesh layers and multiple continuous fiber layers are alternately stacked to form a preform of the ceramic brake disc body; or

[0010] The substrate includes a mesh layer and a continuous fiber layer, wherein there are multiple mesh layers and one continuous fiber layer, and the continuous fiber layer and multiple mesh layers are stacked to form a preform of the ceramic brake disc body; or

[0011] The substrate includes a continuous fiber layer and a mesh layer, wherein there are multiple continuous fiber layers and one mesh layer, and the mesh layer and multiple continuous fiber layers are stacked to form a preform of the ceramic brake disc body; or

[0012] The substrate includes multiple continuous fiber layers, which are stacked to form a preform of the ceramic brake disc body.

[0013] Optionally, the stud is made of the same material as the ceramic brake disc body.

[0014] Optionally, the needle density of the ceramic brake disc body is 50-100 needles / cm. 2 .

[0015] Optionally, the radial cross-sectional area of ​​the plurality of threaded holes occupies 10-30% of the radial cross-sectional area of ​​the ceramic brake disc body.

[0016] The present invention also provides a method for processing a ceramic brake disc, comprising the following steps:

[0017] Multiple threaded holes are made on the preform of the ceramic brake disc body, and the axis of the threaded holes forms an angle with the plane on which the preform of the ceramic brake disc body is located.

[0018] Screw a stud that fits the threaded hole into the threaded hole.

[0019] Optionally, the substrate is carbonized and chemically vapor-deposited to obtain a preform of the ceramic brake disc body.

[0020] Optionally, before carbonizing the substrate, the substrate is needle-punched with a needle-punching density of 50-100 needles / cm. 2 .

[0021] Optionally, the substrate of the stud is subjected to needle punching, carbonization and chemical vapor deposition to obtain a stud preform, and then the stud preform is processed to obtain the stud.

[0022] The present invention also provides a vehicle comprising the aforementioned ceramic brake disc.

[0023] The technical solution provided by the embodiments of the present invention has the following advantages compared with the prior art:

[0024] The ceramic brake disc provided by this invention has multiple threaded holes on its body, and studs are provided in the threaded holes. The bonding parts of the base material of the ceramic brake disc body are interlocked by the studs to achieve reinforcement, thereby meeting the shear strength requirements. Moreover, the ceramic brake disc can meet the shear strength requirements without needle punching or with low-density needle punching, avoiding or reducing damage to the fibers during the needle punching process and increasing the strength of the ceramic brake disc. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0027] Figure 1 is a cross-sectional view of the preform described in the embodiment of the present invention when it is composed of multiple mesh layers and multiple continuous fiber layers stacked alternately.

[0028] Figure 2 is a cross-sectional view of the preform according to an embodiment of the present invention, which is composed of a mesh layer and multiple continuous fiber layers stacked together.

[0029] Figure 3 is a cross-sectional view of the preform described in the embodiment of the present invention when it is composed of a continuous fiber layer and multiple mesh layers stacked together.

[0030] Figure 4 is a cross-sectional view of the preform in an embodiment of the present invention when it is composed of multiple continuous fiber layers stacked together.

[0031] Figure 5 is a cross-sectional view of the preform of the ceramic brake disc according to an embodiment of the present invention with threaded holes.

[0032] Figure 6 is a cross-sectional view of the preform of the ceramic brake disc when the threaded hole is tilted in one direction according to an embodiment of the present invention.

[0033] Figure 7 is a cross-sectional view of the preform of the ceramic brake disc when the threaded hole is tilted in multiple directions according to an embodiment of the present invention;

[0034] Figure 8 is a cross-sectional view of the preform of the ceramic brake disc with a stud inserted in a threaded hole according to an embodiment of the present invention;

[0035] Figure 9 is a top view of the preform of the ceramic brake disc according to an embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures

[0037] 1. Ceramic brake disc body; 11. Threaded hole; 12. Stud; 2. Mesh layer; 3. Continuous fiber layer. Detailed Implementation

[0038] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments and features of the present invention can be combined with each other.

[0039] The following description sets forth many specific details in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments described in the specification are only some, not all, of the embodiments of the invention.

[0040] Referring to Figures 1 to 9, the ceramic brake disc provided in this embodiment of the invention includes a ceramic brake disc body 1, which includes a substrate. The ceramic brake disc body 1 has multiple threaded holes 11, with the axis of each threaded hole 11 forming an angle with the plane of the substrate. The ceramic brake disc also includes multiple studs 12, each stud corresponding to one of the threaded holes 11 and adapted to fit within the threaded holes 11. The studs 12 are disposed within the threaded holes 11, ensuring that the ends of the studs 12 within the threaded holes 11 are flush with the surface of the ceramic brake disc body 1, or that the studs 12 are completely contained within the threaded holes 11.

[0041] In the ceramic brake disc provided by the present invention, a plurality of threaded holes 11 are opened on the ceramic brake disc body 1, and studs 12 are provided in the threaded holes 11. The bonding parts of the base material of the ceramic brake disc body 1 are interlocked with each other under the action of the studs 12 to achieve reinforcement, thereby meeting the shear strength requirements. Moreover, the ceramic brake disc does not need to be needled or the needled density can be reduced to meet the shear strength requirements of the ceramic brake disc, avoiding or reducing the damage to the fibers during the needled process and increasing the strength of the ceramic brake disc.

[0042] In some embodiments, as shown in Figures 5 and 8, the angle between the axis of the threaded hole 11 and the plane of the substrate is 90°, that is, the threaded hole 11 extends along a direction perpendicular to the plane of the substrate, so that the stud 12 is screwed into the threaded hole 11 along a direction perpendicular to the ceramic brake disc body 1, so that during the screwing of the stud 12, the joint parts of adjacent substrates are engaged together. The vertically arranged threaded hole 11 has a simple processing technology and can effectively increase the bonding force of the substrate.

[0043] In other embodiments, as shown in Figures 6 and 7, the angle between the axis of the threaded hole 11 and the plane of the substrate is 45-90°. In this case, the stud 12 will be inserted obliquely into the threaded hole 11 to further improve the bonding force between the substrates. More preferably, the angle between the axis of the threaded hole 11 and the plane of the substrate is 60-90°, and the angle between the axis of the threaded hole 11 and the plane of the substrate is -60-90°.

[0044] In one feasible implementation, as shown in Figure 6, the multiple threaded holes 11 extend in the same direction to increase the ease of machining the threaded holes 11.

[0045] In another feasible embodiment, as shown in Figure 7, the multiple threaded holes 11 extend in different directions, so that the studs 12 are inserted into the preform of the ceramic brake disc body 1 at different angles. With this design, the studs 12 are inserted into the preform of the ceramic brake disc body 1 at different angles. The length of the studs 12 between adjacent layers of the substrate increases, and the distance between the cracks propagating from one layer to the next increases. At this point, a larger external load is required to separate the joints of adjacent materials, thus ensuring the bonding strength between the connected materials.

[0046] In some embodiments, as shown in FIG1, the substrate includes a mesh layer 2 and a continuous fiber layer 3, and there are multiple mesh layers 2 and multiple continuous fiber layers 3. Multiple mesh layers 2 and multiple continuous fiber layers 3 are stacked alternately to form a preform of ceramic brake disc body 1.

[0047] Specifically, a preform is obtained by alternately stacking multiple mesh layers 2 and multiple continuous fiber layers 3 and then performing needle punching, carbonization and chemical vapor deposition treatments.

[0048] In some other embodiments, as shown in FIG2, the substrate includes a mesh layer 2 and a continuous fiber layer 3. There are multiple mesh layers 2 and one continuous fiber layer 3. The continuous fiber layer 3 and multiple mesh layers 2 are stacked to form a preform of the ceramic brake disc body 1.

[0049] Specifically, multiple mesh layers 2 are stacked sequentially, and a continuous fiber layer 3 is stacked on the outside of the mesh layer 2 at the edge. The stacked continuous fiber layer 3 and multiple mesh layers 2 are then subjected to needle punching, carbonization and chemical vapor deposition to obtain a preform.

[0050] In some other embodiments, as shown in FIG3, the substrate includes a continuous fiber layer 3 and a mesh layer 2. There are multiple continuous fiber layers 3 and one mesh layer 2. The mesh layer 2 and multiple continuous fiber layers 3 are stacked to form a preform of the ceramic brake disc body 1.

[0051] Specifically, multiple continuous fiber layers 3 are stacked sequentially, and a mesh layer 2 is stacked on the outside of the continuous fiber layer 3 at the edge. The stacked mesh layer 2 and multiple continuous fiber layers 3 are then subjected to needle punching, carbonization and chemical vapor deposition to obtain a preform.

[0052] In other embodiments, as shown in FIG4, the substrate includes a continuous fiber layer 3, and there are multiple continuous fiber layers 3. The multiple continuous fiber layers 3 are stacked to form a preform of the ceramic brake disc body 1.

[0053] Specifically, multiple continuous fiber layers 3 are stacked, and then the stacked continuous fiber layers 3 are needled, carbonized and chemically vapor-deposited to obtain a preform.

[0054] In other embodiments, the substrate includes a continuous fiber layer 3 and a mesh layer 2. The continuous fiber layer 3 and the mesh layer 2 are first combined into a fiber cloth. The cloth is inclined relative to the plane of the ceramic brake disc body 1, and the angle between the cloth and the plane of the ceramic brake disc body 1 is 0-5°. The cloth is stacked in a spiral upward manner with the axis of the ceramic brake disc body 1 as the rotation center, thereby obtaining the preform of the desired ceramic brake disc body 1.

[0055] As can be seen, there are no restrictions on the way the preforms are set up, as long as the preforms obtained after the substrate is treated by needle punching, carbonization and chemical vapor deposition meet the strength requirements.

[0056] The mesh layer 2 is a continuous carbon fiber material formed by overlapping carbon fibers with a length of 4-8 cm. The continuous fiber layer 3 is a layered structure woven from continuous fibers.

[0057] The stud 12 in this application is made of the same material as the ceramic brake disc body 1. Since different materials have different coefficients of thermal expansion, if studs 12 and the ceramic brake disc body 1 were made of different materials, cracking of the ceramic brake disc body 1 could easily occur during heating due to the difference in thermal expansion coefficients. Therefore, the stud 12 and the ceramic brake disc body 1 in this application are made of the same material. It is understood that when studs 12 and the ceramic brake disc body 1 are made of different materials, their coefficients of thermal expansion should be similar to eliminate the effects caused by differences in thermal expansion coefficients.

[0058] In some embodiments, the substrate of the stud 12 includes a mesh layer 2 and a continuous fiber layer 3, and there are multiple mesh layers 2 and multiple continuous fiber layers 3. Multiple mesh layers 2 and multiple continuous fiber layers 3 are stacked alternately to form a preform of the stud 12, and then the preform of the stud 12 is processed into the stud 12.

[0059] In other embodiments, the substrate of the stud 12 includes a mesh layer 2 and a continuous fiber layer 3. There are multiple mesh layers 2 and one continuous fiber layer 3. The continuous fiber layer 3 and multiple mesh layers 2 are stacked to form a preform of the stud 12, and then the preform of the stud 12 is processed into the stud 12.

[0060] In other embodiments, the stud 12 is formed by stacking a continuous fiber layer 3 and a mesh layer 2, wherein there are multiple continuous fiber layers 3 and one mesh layer 2. The mesh layer 2 and multiple continuous fiber layers 3 are stacked to form a preform of the stud 12, and then the preform of the stud 12 is processed into the stud 12.

[0061] In other embodiments, the substrate of the stud 12 includes a continuous fiber layer 3, and there are multiple continuous fiber layers 3. The multiple continuous fiber layers 3 are stacked to form a preform of the stud 12, and then the preform of the stud 12 is processed into the stud 12.

[0062] As can be seen, the material of stud 12 can be designed according to the material of the brake disc body prefabrication to meet the design requirements of the same material.

[0063] The needle density of the ceramic brake disc body 1 in this application is 50-100 needles / cm². 2 Specifically, before drilling the threaded hole 11 on the ceramic brake disc body 1, the ceramic brake disc body 1 is needle-punched, and the needle-punching angle is 50-100 needles / cm. 2 Needling can increase the bonding strength between substrates, with 50-100 needles / cm. 2 The needle density is higher than the traditional 200-300 needles / cm. 2 In terms of needle density, the needle density is smaller, and the method of screwing the stud 12 onto the ceramic brake disc body 1 can ensure the bonding force between the substrates. The low-density needle method can reduce damage to the substrate and ensure the strength of the finished ceramic brake disc.

[0064] The radial cross-sectional area of ​​the multiple threaded holes 11 occupies 10-30% of the radial cross-sectional area of ​​the ceramic brake disc body 1, so as to ensure the structural strength of the ceramic brake disc body 1 while increasing the bonding force between adjacent layers of the substrate.

[0065] The present invention also provides a method for processing a ceramic brake disc, comprising the following steps:

[0066] Step S1: Multiple threaded holes 11 are made on the preform of the ceramic brake disc body 1, and the axis of the threaded holes 11 forms an angle with the plane on which the preform of the ceramic brake disc body 1 is located.

[0067] The number, location, and angle of the threaded holes 11 can all be designed according to process requirements.

[0068] Step S2: Screw a stud 12 that is compatible with the threaded hole 11 into the threaded hole 11.

[0069] Specifically, during the process of screwing the stud 12 into the threaded hole 11, the joint parts between the carbon fiber units should be interlocked by the screw 12 to achieve reinforcement.

[0070] In step S1, the substrate is subjected to carbonization and chemical vapor deposition to obtain the preform, specifically including the following steps:

[0071] Step S11 involves carbonizing the substrate. Carbonization involves heating the sample under inert or vacuum conditions to remove the sizing agent from the carbon fiber surface. Generally, carbon fibers are impregnated with a sizing agent at the factory to prevent separation between fiber bundles during use, thus preserving the shape of the carbon fiber bundles. The sizing agent needs to be removed before chemical vapor deposition to ensure good adhesion of the deposited carbon to the carbon fiber surface.

[0072] Step S12 involves placing the carbonized substrate in a chemical vapor deposition furnace, introducing a mixture of propylene and argon gas, setting the deposition temperature to 900-1000℃, the deposition pressure to 3-5 kPa, and the deposition time to 80 hours. This chemical vapor deposition process is a conventional technique and therefore will not be described in detail here.

[0073] In other embodiments, the substrate is needle-punched before carbonization, which further increases the bonding strength between the substrates. Since the bonding strength between the substrates is reinforced by tightening bolts in the preform, the needle-punching density in this application is 50-100 needles / cm². 2 This can effectively reduce the damage to the substrate during the needle punching process, while ensuring the strength of the finished ceramic brake disc.

[0074] The processing method for the ceramic brake disc of this application also includes the following steps:

[0075] Step S3: After screwing the stud 12 into the threaded hole 11, a preform is obtained, and the preform is subjected to high-temperature treatment.

[0076] Specifically, the high-temperature treatment is 2200-2400℃, the purpose of which is to increase the graphitization degree of carbon in the material. Among them, carbon atoms in carbon that have not undergone high-temperature treatment have a lower degree of order, and therefore their strength is also lower; while after high-temperature treatment, the carbon atoms are arranged in a more ordered manner, which is closer to the arrangement of atoms in graphite.

[0077] Step S4: The high-temperature treated blank is subjected to liquid phase silicon infiltration process to obtain carbon ceramic brake disc blank.

[0078] Specifically, the preform treated at high temperature is placed in a high-temperature furnace for melt silicon infiltration at a temperature of 1900℃ under vacuum for 1 hour. During this process, silicon melts into liquid silicon above 1400℃ and infiltrates into the C / C preform through capillary action. The silicon reacts with the carbon in the preform to form silicon carbide, thus obtaining a carbon-ceramic brake disc.

[0079] Step S5: The surface of the carbon-ceramic brake disc blank is processed to obtain a ceramic brake disc.

[0080] Specifically, the finished carbon-ceramic brake disc can be obtained by fine grinding the end face of the carbon-ceramic brake disc blank.

[0081] Similarly, the substrate of the stud 12 is subjected to needle punching, carbonization, and chemical vapor deposition to obtain a preform of the stud 12. This preform is then processed to obtain the stud 12. The method for obtaining the preform of the stud 12 is the same as that for obtaining the preform of the ceramic brake disc; therefore, it is not described in detail here. This processing method can obtain a stud 12 made of the same material as the ceramic brake disc body 1, thus meeting design requirements.

[0082] In the processing method of ceramic brake disc provided by the present invention, threaded holes 11 are opened on the preform of ceramic brake disc, and then studs 12 are screwed on. Therefore, the joint parts between the carbon fiber units in the preform are interlocked by the studs 12 to achieve reinforcement, so as to meet the shear strength requirements. Moreover, the preform of this manufacturing method can meet the shear strength requirements of ceramic brake disc without needling or reducing the needling density, avoiding or reducing the damage to the fibers during the needling process, and increasing the strength of the ceramic brake disc after silicon infiltration.

[0083] The following description uses specific embodiments and comparative examples:

[0084] Example 1

[0085] The processing method for ceramic brake discs includes the following steps:

[0086] Step S1: After alternatingly stacking multiple mesh layers 2 and multiple continuous fiber layers 3, carbonization and chemical vapor deposition are performed to obtain a preform, and threaded holes 11 are opened on the preform.

[0087] The needle density of the preform is 100 needles / cm. 2 The threaded hole 11 is round and perpendicular to the preform (the angle between the axis of the threaded hole 11 and the plane of the preform is 90°). The diameter of the stud 12 is 5mm and the minimum distance between two adjacent studs 12 is 15mm.

[0088] Step S2: Insert a matching stud 12 into the threaded hole 11.

[0089] Step S3: Insert the stud 12 into the threaded hole 11 to obtain the preform, and then perform high-temperature treatment on the preform.

[0090] Step S4: The high-temperature treated blank is subjected to liquid phase silicon infiltration process to obtain carbon ceramic brake disc blank.

[0091] Step S5: The surface of the carbon-ceramic brake disc blank is processed to obtain a ceramic brake disc.

[0092] Example 2

[0093] The processing method for ceramic brake discs includes the following steps:

[0094] Step S1: After alternatingly stacking multiple mesh layers 2 and multiple continuous fiber layers 3, carbonization and chemical vapor deposition are performed to obtain a preform, and threaded holes 11 are opened on the preform.

[0095] The needle density of the preform is 100 needles / cm. 2 The threaded hole 11 is round and perpendicular to the preform (the angle between the axis of the threaded hole 11 and the plane of the preform is 90°). The diameter of the stud 12 is 5mm and the minimum distance between two adjacent studs 12 is 20mm.

[0096] Step S2: Insert a matching stud 12 into the threaded hole 11.

[0097] Step S3: Insert the stud 12 into the threaded hole 11 to obtain the preform, and then perform high-temperature treatment on the preform.

[0098] Step S4: The high-temperature treated blank is subjected to liquid phase silicon infiltration process to obtain carbon ceramic brake disc blank.

[0099] Step S5: The surface of the carbon-ceramic brake disc blank is processed to obtain a ceramic brake disc.

[0100] Example 3

[0101] The processing method for ceramic brake discs includes the following steps:

[0102] Step S1: After alternatingly stacking multiple mesh layers 2 and multiple continuous fiber layers 3, carbonization and chemical vapor deposition are performed to obtain a preform, and threaded holes 11 are opened on the preform.

[0103] The needle density of the preform is 100 needles / cm. 2 The threaded hole 11 is round, and the threaded hole 11 and the upper surface of the preform form a 60° angle (the angle between the axis of the threaded hole 11 and the plane on which the preform is located is 60°). The diameter of the stud 12 is 5mm, and the minimum distance between two adjacent studs 12 is 20mm.

[0104] Step S2: Insert a matching stud 12 into the threaded hole 11.

[0105] Step S3: Insert the stud 12 into the threaded hole 11 to obtain the preform, and then perform high-temperature treatment on the preform.

[0106] Step S4: The high-temperature treated blank is subjected to liquid phase silicon infiltration process to obtain carbon ceramic brake disc blank.

[0107] Step S5: The surface of the carbon-ceramic brake disc blank is processed to obtain a ceramic brake disc.

[0108] Example 4

[0109] The processing method for ceramic brake discs includes the following steps:

[0110] Step S1: After alternatingly stacking multiple mesh layers 2 and multiple continuous fiber layers 3, carbonization and chemical vapor deposition are performed to obtain a preform, and threaded holes 11 are opened on the preform.

[0111] The needle density of the preform is 100 needles / cm. 2 The threaded hole 11 is round, and the threaded hole 11 and the upper surface of the preform form a 45° angle (the angle between the axis of the threaded hole 11 and the plane on which the preform is located is 45°). The diameter of the stud 12 is 5mm, and the minimum distance between two adjacent studs 12 is 20mm.

[0112] Step S2: Insert a matching stud 12 into the threaded hole 11.

[0113] Step S3: Insert the stud 12 into the threaded hole 11 to obtain the preform, and then perform high-temperature treatment on the preform.

[0114] Step S4: The high-temperature treated blank is subjected to liquid phase silicon infiltration process to obtain carbon ceramic brake disc blank.

[0115] Step S5: The surface of the carbon-ceramic brake disc blank is processed to obtain a ceramic brake disc.

[0116] Example 5

[0117] The processing method for ceramic brake discs includes the following steps:

[0118] Step S1: After alternatingly stacking multiple mesh layers 2 and multiple continuous fiber layers 3, carbonization and chemical vapor deposition are performed to obtain a preform, and threaded holes 11 are opened on the preform.

[0119] The needle density of the preform is 150 needles / cm. 2The threaded hole 11 is round and perpendicular to the preform (the angle between the axis of the threaded hole 11 and the plane of the preform is 90°). The diameter of the stud 12 is 5mm and the minimum distance between two adjacent studs 12 is 20mm.

[0120] Step S2: Insert a matching stud 12 into the threaded hole 11.

[0121] Step S3: Insert the stud 12 into the threaded hole 11 to obtain the preform, and then perform high-temperature treatment on the preform.

[0122] Step S4: The high-temperature treated blank is subjected to liquid phase silicon infiltration process to obtain carbon ceramic brake disc blank.

[0123] Step S5: Process the surface of the carbon-ceramic brake disc blank to obtain a ceramic brake disc.

[0124] Comparative Example 1

[0125] The processing method for ceramic brake discs includes the following steps:

[0126] Step S1: After alternatingly stacking multiple mesh layers 2 and multiple continuous fiber layers 3, carbonization and chemical vapor deposition are performed to obtain a preform.

[0127] Step S2 involves subjecting the preform to high-temperature treatment.

[0128] Step S3: The preform treated at high temperature is subjected to liquid phase silicon infiltration process to obtain carbon ceramic brake disc blank.

[0129] Step S4: The surface of the carbon-ceramic brake disc blank is processed to obtain a ceramic brake disc.

[0130] The bending strength and shear strength of ceramic brake discs manufactured using the ceramic brake disc processing method of this application and conventional ceramic brake disc processing methods are as follows:

[0131] Bending strength and shear strength: Example 1: 140 MPa, 50 MPa; Example 2: 160 MPa, 45 MPa; Example 3: 134 MPa, 60 MPa; Example 4: 130 MPa, 65 MPa; Example 5: 145 MPa, 47 MPa; Comparative Example 1: 120 MPa, 40 MPa surface

[0132] As can be seen from the above, the ceramic brake discs obtained by the processing method of this application have improved bending strength and shear strength compared with ceramic brake discs made by traditional processing methods.

[0133] The present invention also provides a vehicle comprising the aforementioned ceramic brake disc, wherein the ceramic brake disc comprises all the technical features of the aforementioned ceramic brake disc.

[0134] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0135] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A ceramic brake disc, comprising a ceramic brake disc body (1), wherein the ceramic brake disc body (1) comprises a substrate, characterized in that, The substrate includes multiple stacked layers, which are either a mesh layer (2) or a continuous fiber layer (3). The ceramic brake disc body (1) has multiple threaded holes (11) passing through the multiple layers. The axis of the threaded hole (11) forms an angle with the plane of the substrate. The angle between the axis of the threaded hole (11) and the plane of the substrate is 45-90°. The ceramic brake disc also includes multiple studs (12). The studs (12) correspond one-to-one with the threaded holes (11), and the studs (12) are disposed in the threaded holes (11).

2. The ceramic brake disc according to claim 1, characterized in that, The angle between the axis of the threaded hole (11) and the plane of the substrate is 90°.

3. The ceramic brake disc according to claim 1, characterized in that, The multiple threaded holes (11) may extend in the same or different directions.

4. The ceramic brake disc according to claim 1, characterized in that, The substrate includes the mesh layer (2) and the continuous fiber layer (3), and there are multiple mesh layers (2) and multiple continuous fiber layers (3). Multiple mesh layers (2) and multiple continuous fiber layers (3) are stacked alternately to form a preform of the ceramic brake disc body (1); or the substrate includes the mesh layer (2) and the continuous fiber layer (3), and there are multiple mesh layers (2) and one continuous fiber layer (3). The continuous fiber layer (3) and multiple mesh layers (2) are stacked to form the ceramic brake disc body (1). The preform of the disc body (1); or the substrate includes the continuous fiber layer (3) and the mesh layer (2), wherein there are multiple continuous fiber layers (3) and one mesh layer (2), and the mesh layer (2) and multiple continuous fiber layers (3) are stacked to form the preform of the ceramic brake disc body (1); or the substrate includes the continuous fiber layer (3), wherein there are multiple continuous fiber layers (3), and multiple continuous fiber layers (3) are stacked to form the preform of the ceramic brake disc body (1).

5. The ceramic brake disc according to any one of claims 1 to 4, characterized in that, The stud (12) is made of the same material as the ceramic brake disc body (1).

6. The ceramic brake disc according to any one of claims 1 to 4, characterized in that, The needle density of the ceramic brake disc body (1) is 50-100 needles / cm. 2 .

7. The ceramic brake disc according to any one of claims 1 to 4, characterized in that, The radial cross-sectional area of ​​the plurality of threaded holes (11) occupies 10-30% of the radial cross-sectional area of ​​the ceramic brake disc body (1).

8. A method for processing a ceramic brake disc, wherein the method is used to produce the ceramic brake disc according to any one of claims 1 to 7, characterized in that, Includes the following steps: Multiple threaded holes (11) are made on the preform of the ceramic brake disc body (1), and the axis of the threaded hole (11) forms an angle with the plane of the preform of the ceramic brake disc body (1); a stud (12) that matches the threaded hole (11) is screwed into the threaded hole (11).

9. The processing method of the ceramic brake disc according to claim 8, characterized in that, The substrate is carbonized and chemical vapor deposition to obtain a preform of the ceramic brake disc body (1).

10. The processing method of the ceramic brake disc according to claim 9, characterized in that, Before carbonizing the substrate, the substrate is needle-punched with a needle-punching density of 50-100 needles / cm. 2 .

11. The processing method of the ceramic brake disc according to claim 8, characterized in that, The substrate of the stud (12) is subjected to needle punching, carbonization and chemical vapor deposition to obtain a preform of the stud (12), and then the preform of the stud (12) is processed to obtain the stud (12).

12. A vehicle, characterized in that, Includes the ceramic brake disc as described in any one of claims 1 to 7.

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