Brake disc, brake and vehicle

Abstract

The utility model relates to a brake disc, a brake and a vehicle, and relates to the technical field of brakes. The base body comprises a first surface and a second surface which are oppositely arranged, and the edge of the first surface and / or the edge of the second surface are / is provided with protruding structures; the protruding structures protrude towards the thickness direction of the base body. According to the brake disc, the protruding structures arranged on the edges can protect the first surface and / or the second surface, and the risk that the surface of the base body is cracked and damaged due to the fact that stones directly impact the surface of the base body is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of brakes, and in particular to a brake disc, a brake and a vehicle. Background Art

[0002] Brake discs are important components used in vehicle braking. At present, with the improvement of vehicle performance, the performance requirements for brake discs are also getting higher and higher. In order to meet the requirements of high friction coefficient and long service life of brake discs, a friction layer is usually loaded on the base of the brake disc. In the related art, the friction layer and the base in the brake disc are an upper and lower layer structure, that is, the friction layer covers the surface of the base. However, this setting method can easily cause the friction layer at the edge of the brake disc to crack and fall off due to the impact of stones, etc., which in turn causes the edge of the friction layer to be chipped and damaged. Utility Model Content

[0003] The embodiment of the present application provides a brake disc to improve the technical problem that the friction layer at the edge of the brake disc is damaged due to the impact of stones.

[0004] In order to achieve the above object, according to a first aspect of the present application, a brake disc is provided, comprising:

[0005] The base comprises a first surface and a second surface which are arranged opposite to each other, and a convex structure is arranged on the edge of the first surface and / or the second surface;

[0006] The protruding structure protrudes toward the thickness direction of the substrate.

[0007] Optionally, the matrix is ​​a ring structure;

[0008] At least one side edge of the first surface is provided with a protruding structure;

[0009] And / or, at least one side edge of the second surface is provided with a protruding structure.

[0010] Optionally, the outer diameter of the substrate is R, and the width of the protruding structure located at one side edge of the first surface or the second surface is d, wherein 0.05%R≤d≤3%R.

[0011] Optionally, 1mm≤d≤15mm.

[0012] Optionally, a friction layer is also included;

[0013] The friction layer is arranged on the first surface and / or the second surface;

[0014] The friction layer and the protrusion structure are arranged on the same side of the substrate, and the friction layer and the protrusion structure respectively cover different areas of the first surface and / or the second surface.

[0015] Optionally, the thickness of the friction layer is D1, the thickness of the protruding structure is D2, and D2≥D1.

[0016] Optionally, 0≤D2-D1≤2mm; and / or, 0.2mm≤D1≤3mm, 0.2mm≤D2≤3mm.

[0017] Optionally, the protrusion structure and the friction layer are made of different materials.

[0018] Optionally, the impact toughness of the protrusion structure is greater than the impact toughness of the friction layer.

[0019] Optionally, the protruding structure is integrally formed with the base.

[0020] Optionally, the friction layer includes a first friction layer and a second friction layer, and the protrusion structure includes a first protrusion structure and a second protrusion structure; wherein the first friction layer and the first protrusion structure are arranged on the first surface, and the first protrusion structure is located on at least one side edge of the first surface; and the second friction layer and the second protrusion structure are arranged on the second surface, and the second protrusion structure is located on at least one side edge of the second surface.

[0021] Optionally, the first protrusion structure includes a first sub-protrusion structure and a second sub-protrusion structure; wherein the first sub-protrusion structure is located at the inner edge of the first surface, the second sub-protrusion structure is located at the outer edge of the first surface, and the first friction layer is arranged between the first sub-protrusion structure and the second sub-protrusion structure.

[0022] Optionally, the second protrusion structure includes a third sub-protrusion structure and a fourth sub-protrusion structure; wherein the third sub-protrusion structure is located at the inner edge of the second surface, the fourth sub-protrusion structure is located at the outer edge of the second surface, and the second friction layer is arranged between the third sub-protrusion structure and the fourth sub-protrusion structure.

[0023] Optionally, a contact surface is formed between adjacent friction layers and protrusion structures;

[0024] The angle between the contact surface and the first surface is α, 60°≤α≤90°.

[0025] Optionally, the strength of the protrusion structure is 80-130MPa and the impact toughness is 10-40kJ / m 2 .

[0026] According to a second aspect of the present application, a brake is also provided, comprising the above brake disc.

[0027] According to a third aspect of the present application, a vehicle is also provided, comprising the brake as described above.

[0028] The brake disc of the embodiment of the present application includes a substrate, the substrate includes a first surface and a second surface arranged opposite to each other, the edge of the first surface or the second surface is provided with a protruding structure protruding toward the thickness direction of the substrate, or the edges of the first surface and the second surface are provided with a protruding structure protruding toward the thickness direction of the substrate. The protruding structure arranged at the edge can protect the first surface and / or the second surface, and reduce the risk of cracking and damage of the substrate surface caused by direct impact of stones on the substrate surface.

[0029] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0031] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0032] Figure 1 is a schematic diagram of the three-dimensional structure of a brake disc provided in an exemplary embodiment of the present application;

[0033] Figure 2 is a rear view of a brake disc provided in an exemplary embodiment of the present application;

[0034] Figure 3 is a front view of a brake disc provided in an exemplary embodiment of the present application;

[0035] Figure 4 yes Figure 3 Sectional view at AA in the middle;

[0036] Figure 5 yes Figure 4 A magnified schematic diagram of point B in the middle.

[0037] Description of reference numerals:

[0038] 100. brake disc; 1. substrate; 111. first surface; 112. second surface; 120. friction layer; 121. first friction layer; 122. second friction layer; 130. protrusion structure; 131. first protrusion structure; 1311. first sub-protrusion structure; 1312. second sub-protrusion structure; 132. second protrusion structure; 1321. third sub-protrusion structure; 1322. fourth sub-protrusion structure; 140. contact surface. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0040] The present application provides a brake disc 100, see Figure 1 ,in, Figure 1 (A) and (B) are schematic diagrams of the three-dimensional structure of the brake disc 100 at different viewing angles.

[0041] The brake disc 100 includes a substrate 1, which includes a first surface 111 and a second surface 112. The edges of the first surface 111 and / or the second surface 112 are provided with a protruding structure 130. The protruding structure 130 protrudes toward the thickness direction of the substrate 1. The protruding structure 130 provided at the edge of the first surface 111 and / or the second surface 112 can protect the first surface 111 and / or the second surface 112, and reduce the risk of cracking and damage of the surface of the substrate 1 caused by direct impact of stones on the surface of the substrate 1.

[0042] It should be noted that the protruding structure 130 may be integrally formed with the base body 1 , or may be fixedly connected to the base body 1 by welding or other connection forms.

[0043] In some embodiments, see Figure 1 The base 1 is a circular ring structure, and the base 1 of the circular ring structure includes two edges, namely an inner edge and an outer edge. Among them, at least one side edge of the first surface 111 is provided with a protruding structure 130. In other words, the protruding structure 130 can be provided only on one side edge of the inner edge and the outer edge of the first surface 111, or can be provided on both the inner edge and the outer edge of the first surface 111.

[0044] It is understandable that when both the inner edge and the outer edge of the first surface 111 are provided with a protrusion structure 130, a groove structure is formed between the two protrusion structures 130. The two protrusion structures 130 can respectively protect the inner edge and the outer edge of the first surface 111.

[0045] It should also be noted that the thickness direction of the substrate 1 is the axial direction of the substrate 1 .

[0046] Similarly, at least one side edge of the second surface 112 is also provided with a protruding structure 130. That is, the protruding structure 130 may be provided only on one side edge of the inner edge and the outer edge of the second surface 112, or may be provided on both the inner edge and the outer edge of the second surface 112.

[0047] It is understandable that when both the inner edge and the outer edge of the second surface 112 are provided with a protrusion structure 130, a groove structure is formed between the two protrusion structures 130. The two protrusion structures 130 can respectively protect the inner edge and the outer edge of the second surface 112.

[0048] In some embodiments, see Figure 2 , the outer diameter of the substrate 1 is R, the width of the protruding structure 130 located at one side edge of the first surface 111 or the second surface 112 is d, 0.05%R≤d≤3%R. That is, d / R=0.05%-3%. If the width of the protruding structure 130 is too small, it is easy to cause low strength and easy to be damaged when bumped by the outside, and the protection effect is poor; if the width is too large, it will excessively occupy the space of the first surface 111 or the second surface 112.

[0049] Illustratively, d / R may be 0.05%, 0.2%, 0.5%, 0.8%, 1%, 1.5%, 2%, 2.5% or 3%.

[0050] The width of the protrusion structure 130 refers to its width along the radial direction of the substrate 1 .

[0051] In some embodiments, 1 mm ≤ d ≤ 15 mm. By setting the width d of the protruding structure 130 located at one side edge of the first surface 111 or the second surface 112 to meet the requirement of 1 mm ≤ d ≤ 15 mm, the structural strength of the protruding structure 130 can be improved without excessively occupying the space of the first surface 111 or the second surface 112.

[0052] Illustratively, d may be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, or 15 mm.

[0053] In some embodiments, the brake disc 100 further includes a friction layer 120. The friction layer 120 is disposed on the first surface 111 and / or the second surface 112. The friction layer 120 and the protrusion structure 130 are disposed on the same side of the substrate 1, and the friction layer 120 and the protrusion structure 130 cover different areas of the first surface 111 and / or the second surface 112, respectively.

[0054] That is, the friction layer 120 is disposed on the side of the substrate 1 where the protrusion structure 130 exists. For example, if the protrusion structure 130 is only disposed on the first surface 111, then the friction layer 120 is also only disposed on the first surface 111; if the protrusion structure 130 is simultaneously disposed on the first surface 111 and the second surface 112, then the friction layer 120 is also simultaneously disposed on the first surface 111 and the second surface 112.

[0055] The friction layer 120 can increase the friction coefficient of the brake disc 100 to provide a better braking effect, and the friction layer 120 arranged on the first surface 111 and / or the second surface 112 can reduce the wear on the substrate 1 during braking to increase the service life of the brake disc 100.

[0056] The friction layer 120 and the protruding structure 130 disposed on the same side cover different areas of the first surface 111 and / or the second surface 112 respectively. That is, the friction layer 120 and the protruding structure 130 located on the same side do not overlap each other in the thickness direction of the substrate 1, but are laid flat in different areas. Since the friction layer 120 needs to ensure a high friction coefficient and is generally low in strength, the protruding structure 130 disposed on the same side as the friction layer 120 can protect the edge of the friction layer 120, reducing or avoiding the cracking and falling off caused by the impact of stones on the edge of the friction layer 120.

[0057] In some embodiments, the thickness of the friction layer 120 is D1, and the thickness of the protruding structure 130 is D2, where D2≥D1. That is, the protruding structure 130 disposed on the same surface can be flush with the friction layer 120, or protrude from the friction layer 120, thereby ensuring that the protruding structure 130 can cover the edge of the friction layer 120, thereby improving the protective effect on the edge of the friction layer 120.

[0058] For example, see Figure 1-Figure 3 The substrate 1 is annular in shape, and the thickness of the friction layer 120 and the protrusion structure 130 refers to their thickness extending along the axial direction of the substrate 1.

[0059] In some embodiments, 0≤D2-D1≤2mm. That is, the protruding structure 130 can be flush with the friction layer 120, or it can protrude less than 2mm relative to the friction layer 120. By controlling 0≤D2-D1≤2mm, it can be ensured that the edges of the friction layer 120 are effectively covered by the protruding structure 130, so that small stones and the like directly impact the edges of the friction layer 120 during the operation of the brake disc 100, thereby preventing the brake disc 100 from cracking and falling off. In addition, the protruding distance of the protruding structure 130 from the friction layer 120 is small, and the protruding structure 130 will not interfere with other components in the brake disc 100.

[0060] In some embodiments, 0.2 mm ≤ D1 ≤ 3 mm, 0.2 mm ≤ D2 ≤ 3 mm.

[0061] The main component of the friction layer 120 is silicon carbide, which has a large thermal expansion coefficient. If the thickness of the friction layer 120 is too large, it is easy to cause the friction layer 120 to crack, and the bonding force between the friction layer 120 and the substrate 1 is weak, which easily causes the friction layer 120 to peel off; if the thickness of the friction layer 120 is too small, it is easy to cause the service life of the friction layer 120 to be insufficient and the friction coefficient to be reduced. Controlling the thickness of the friction layer 120 within the range of 0.2mm-3mm can reduce the risk of cracking, improve the bonding force of the friction layer 120, and ensure the service life and friction coefficient of the friction layer 120.

[0062] Similarly, in order to take into account the protection effect of the protruding structure 130 and reduce the risk of the protruding structure 130 peeling off, the thickness of the protruding structure 130 is also controlled within the range of 0.2 mm-3 mm.

[0063] For example, the friction layer 120 may have a thickness of 0.2 mm, 0.5 mm, 1 mm, 1.5 mm, 2.0 mm, 2.5 mm, or 3.0 mm. The protrusion structure 130 may have a thickness of 0.2 mm, 0.5 mm, 1 mm, 1.5 mm, 2.0 mm, 2.5 mm, or 3.0 mm.

[0064] In some embodiments, the materials of the protruding structure 130 and the friction layer 120 are different. The friction layer 120 is provided to provide a better friction coefficient, and the protruding structure 130 needs to have a certain strength to improve its protective effect. Therefore, in the specific setting, the materials of the protruding structure 130 and the friction layer 120 are different to achieve different properties and better play the corresponding role.

[0065] In some embodiments, the impact toughness of the protrusion structure 130 is greater than the impact toughness of the friction layer 120. In order to improve the protective effect of the protrusion structure 130 on the friction layer 120, the impact toughness of the protrusion structure 130 is made greater than the impact toughness of the friction layer 120. When stones and the like impact the edge of the brake disc 100, they will first impact the protrusion structure 130 with greater impact toughness, thereby reducing or avoiding the risk of the friction layer 120 being cracked and falling off due to the impact.

[0066] In some embodiments, the protruding structure 130 is integrally formed with the substrate 1. That is to say, the protruding structure 130 and the substrate 1 are an integral structure, which has higher strength and can provide better protection. In the specific implementation process, the protruding structure 130 can be a part of the substrate 1. During the preparation of the brake disc 100, a groove is opened in the area where the friction layer 120 needs to be set, while the structure of the substrate 1 where the protruding structure 130 needs to be set remains unchanged. Since the brake disc 100 needs to work under a higher working intensity, the substrate 1 itself has higher strength and hardness. Using the structure of the substrate 1 itself as the protruding structure 130 can simplify the preparation process, ensure the bonding strength between the protruding structure 130 and the substrate 1, and improve the protection effect.

[0067] In some embodiments, the friction layer 120 includes a first friction layer 121 and a second friction layer 122, and the protrusion structure 130 includes a first protrusion structure 131 and a second protrusion structure 132. The first friction layer 121 and the first protrusion structure 131 are disposed on the first surface 111, and the first protrusion structure 131 is located at least one side edge of the first surface 111. Moreover, the second friction layer 122 and the second protrusion structure 132 are disposed on the second surface 112, and the second protrusion structure 132 is located at least one side edge of the second surface 112.

[0068] That is to say, the friction layer 120 and the protrusion structure are both provided on the first surface 111 and the second surface 112. The first friction layer 121 and the second friction layer 122 are provided on both sides respectively, which can increase the braking area of ​​the brake disc 100, improve the braking performance, and make the wear of both sides more uniform, thereby extending the service life. The first protrusion structure 131 and the second protrusion structure 132 are provided on both sides respectively, which can provide protection for the first friction layer 121 and the second friction layer 122 respectively.

[0069] In some embodiments, the first protrusion structure 131 includes a first sub-protrusion structure 1311 and a second sub-protrusion structure 1312. The first sub-protrusion structure 1311 is located at the inner edge of the first surface 111, the second sub-protrusion structure 1312 is located at the outer edge of the first surface 111, and the first friction layer 121 is disposed between the first sub-protrusion structure 1311 and the second sub-protrusion structure 1312.

[0070] See also Figure 1 and Figure 3The first friction layer 121 and the first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 are all arranged on the first surface 111. The first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 are respectively arranged at the inner edge and the outer edge of the first surface 111, and the first friction layer 121 is arranged between the first sub-protrusion structure 1311 and the second sub-protrusion structure 1312. The first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 can respectively protect the edges on both sides of the first friction layer 121, thereby improving the protective effect.

[0071] Similarly, in some embodiments, the second protrusion structure 132 includes a third sub-protrusion structure 1321 and a fourth sub-protrusion structure 1322. The third sub-protrusion structure 1321 is located at the inner edge of the second surface 112, the fourth sub-protrusion structure 1322 is located at the outer edge of the second surface 112, and the second friction layer 122 is disposed between the third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322.

[0072] See also Figure 1 and Figure 2 The second friction layer 122 and the third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322 are all arranged on the second surface 112. Among them, the third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322 are respectively arranged at the inner edge and the outer edge of the second surface 112, and the second friction layer 122 is arranged between the third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322. The third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322 can respectively protect the edges on both sides of the second friction layer 122, thereby improving the protective effect.

[0073] In some embodiments, the thickness of the first friction layer 121 is D1, the thickness of the first sub-protrusion structure 1311 and the thickness of the second sub-protrusion structure 1312 are both D2, and D2 ≥ D1.

[0074] Among them, the thickness of the first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 is greater than or equal to the thickness of the first friction layer 121. The first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 can be flush with the first friction layer 121, or protrude from the first friction layer 121, ensuring that the first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 can cover the edge of the first friction layer 121, thereby improving the protection of the first friction layer 121.

[0075] Similarly, in some embodiments, the thickness of the second friction layer 122 is D1, and the thickness of the third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322 are both D2, and D2 ≥ D1. This allows the third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322 to be flush with the second friction layer 122, or to protrude from the second friction layer 122, ensuring that the third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322 can cover the edge of the second friction layer 122, thereby improving the protection of the second friction layer 122.

[0076] In some embodiments, see Figure 5 A contact surface 140 is formed between the adjacent friction layers 120 and the protruding structures 130 , wherein an angle α between the contact surface 140 and the first surface 111 is 60°≤α≤90°.

[0077] It is set that 60°≤α≤90°, that is, the contact surface 140 between the friction layer 120 and the protruding structure 130 is perpendicular to the first surface 111 , or there is a certain angle between the contact surface 140 between the friction layer 120 and the protruding structure 130 and the first surface 111 . When α=90°, the protruding structure 130 surrounds at least one side of the friction layer 120, protecting the edge of the friction layer 120, and a contact surface 140 is formed between the friction layer 120 and the protruding structure 130, extending along the axial direction of the substrate 1, and having a relatively narrow width, but the setting process of the friction layer 120 and the protruding structure 130 is relatively simple; when 60°≤α<90°, the contact surface 140 deviates from the axial direction of the substrate 1, and the width will increase, thereby increasing the contact area between the friction layer 120 and the protruding structure 130, and improving the bonding between the friction layer 120 and the protruding structure 130; when α<60°, although the width of the contact surface 140 will further increase, it is easy to cause the strength of the contact area between the friction layer 120 and the protruding structure 130 to be low. Therefore, in this embodiment, it is selected to make α satisfy the condition of 60°≤α≤90°.

[0078] For example, see Figure 5 A contact surface 140 is formed between the first friction layer 121 and the second sub-protrusion structure 1312 , and an angle α=90° is formed between the contact surface 140 and the first surface 111 .

[0079] α may also be 65°, 70°, 75°, 80° and 85°.

[0080] In some embodiments, the protrusion structure 130 has a strength of 80-130 MPa and an impact toughness of 10-40 kJ / m 2The function of the protrusion structure 130 is to provide protection for the edge of the first surface 111 and / or the second surface 112, especially for the edge area of ​​the friction layer 120, so it is required to have a high structural strength. In this embodiment, the strength of the protrusion structure 130 is set to 80-130MPa, and the impact toughness is 10-40kJ / m 2 , taking into account the manufacturing cost and protection effect of the protruding structure 130 .

[0081] According to a second aspect of the present application, a brake is provided, comprising the brake disc 100 as described above. The brake has all the beneficial effects of the brake disc 100 as described above, and the present application will not repeat them here.

[0082] According to a third aspect of the present application, a vehicle is provided, comprising the brake as described above. The vehicle has all the beneficial effects of the above brake, which will not be described in detail in the present application.

[0083] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc., and this application does not make any specific limitation on this.

[0084] Taking a carbon ceramic brake disc as an example, this application exemplarily describes the preparation process of the brake disc:

[0085] The needle-punched body is obtained by laminating and needling the unidirectional fabric and the web, wherein the angle between adjacent unidirectional fabrics is 90°;

[0086] The needle-pierced body is subjected to chemical vapor deposition to obtain a preform, wherein the deposition temperature is 900-1100° C. and the deposition time is 400-600 hours;

[0087] Processing grooves of 0.2 mm to 3 mm on the upper and lower surfaces of the preform, and reserving areas of 0.05%R to 3%R in width on the outer and inner diameter edges of the upper and lower surfaces of the preform as protrusion structures, where R is the outer diameter of the preform;

[0088] The silicon carbide particles, phenolic resin and alcohol are mixed to obtain a friction layer slurry, wherein the silicon carbide particle size is 50-200 microns, the silicon carbide content is 30-50%, the phenolic resin content is 10-50%, and the alcohol content is 30-40%;

[0089] Apply the friction layer slurry in the above groove, the thickness of each coating is 0.2mm, dry after coating, and continue to apply and dry until the above groove is filled, wherein the drying temperature is 60°C, and the sample is dried until it no longer loses weight;

[0090] Curing is carried out at 150°C for 2-3 hours;

[0091] The solidified green body is placed in a carbonization furnace for carbonization at a temperature of 1000°C for 2-4 hours;

[0092] The carbonized green body is deburred and then subjected to liquid phase siliconization to obtain a carbon ceramic green body, wherein the siliconization temperature is 1600-1800°C and the holding time is 2-6h;

[0093] The surface and side of the carbon-ceramic body are machined to obtain a carbon-ceramic brake disc.

[0094] It is understandable that the preparation method provided in the embodiments of the present application is only an exemplary description of the carbon-ceramic brake disc and is not intended to limit the scope of protection of the present application. Those skilled in the art may also adopt other preparation methods as long as the above-mentioned brake disc structure can be prepared.

[0095] The present application is further described below in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present application and are not used to limit the scope of the present application.

[0096] It should be noted that in the following embodiments and comparative examples, the thickness of the friction layer refers to the thickness of the friction layer along the axial direction of the substrate, the thickness of the protrusion structure refers to the thickness of the protrusion structure along the axial direction of the substrate, and the width of the protrusion structure refers to the width of the protrusion structure along the radial direction of the substrate.

[0097] Example 1

[0098] (1) laminating and needling a unidirectional fabric and a web to obtain a needle-punched body, wherein the angle between adjacent unidirectional fabrics is 90°;

[0099] (2) subjecting the needle-punctured body to chemical vapor deposition to obtain a preform, wherein the deposition temperature is 1000° C. and the deposition time is 500 h;

[0100] (3) machining a 0.5 mm groove on the upper and lower surfaces of the preform, and reserving an area with a width of 5 mm on the outer diameter and inner diameter edges of the upper and lower surfaces of the preform as a protrusion structure;

[0101] (4) mixing silicon carbide particles, phenolic resin and alcohol to obtain a friction layer slurry, wherein the particle size of silicon carbide is 120 μm, the content of silicon carbide is 35%, the content of phenolic resin is 30%, and the content of alcohol is 35%;

[0102] (5) Apply the friction layer slurry into the above grooves, with each coating thickness of 0.2 mm, and dry after coating, and then continue to apply and dry until the above grooves are filled, wherein the drying temperature is 60° C., and the sample is dried until it no longer loses weight;

[0103] (6) Curing at 150°C for 2 hours;

[0104] (7) placing the solidified green body into a carbonization furnace for carbonization at a temperature of 1000°C for 3 hours;

[0105] (8) removing burrs from the carbonized green body, and then performing liquid phase siliconization to obtain a carbon ceramic green body, wherein the siliconization temperature is 1600° C. and the holding time is 3 h;

[0106] (9) The surface and side of the carbon ceramic body are machined to obtain a carbon ceramic brake disc.

[0107] In the carbon-ceramic brake disc prepared in this embodiment, the thickness of the friction layer and the thickness of the protruding structure are both 0.5 mm, and the width of the protruding structure is 5 mm.

[0108] Example 2

[0109] The difference between this embodiment and embodiment 1 is that in step (3), an area with a width of 8 mm is reserved at the outer diameter and inner diameter edges of the upper and lower surfaces of the preform as a protruding structure, and the other conditions are consistent with embodiment 1.

[0110] In the carbon-ceramic brake disc prepared in this embodiment, the thickness of the friction layer and the thickness of the protruding structure are both 0.5 mm, and the width of the protruding structure is 8 mm.

[0111] Example 3

[0112] The difference between this embodiment and embodiment 1 is that in step (3), 1 mm grooves are machined on the upper and lower surfaces of the preform, and the other conditions are the same as those in embodiment 1.

[0113] In the carbon-ceramic brake disc prepared in this embodiment, the thickness of the friction layer and the thickness of the protruding structure are both 1 mm, and the width of the protruding structure is 5 mm.

[0114] Comparative Example 1

[0115] The difference between this comparative example and Example 1 is that in step (3), the upper and lower surfaces of the preform are not grooved, and the friction layer slurry is directly coated on the upper and lower surfaces of the preform, with a coating thickness of 0.5 mm, and the other conditions are consistent with Example 1. In the carbon-ceramic brake disc prepared in this comparative example, only the friction layer is provided, and the thickness of the friction layer is 0.5 mm.

[0116] The brake discs in Examples 1-3 and Comparative Example 1 were subjected to impact tests, and the strength and impact toughness of the protrusion structure were tested. The impact test method is as follows: a steel ball with a diameter of 60 mm and a weight of 572 g is used to impact three points on the edge of the brake disc from a height of 60 cm by free fall, and the average area of ​​the falling area on the edge of the brake disc is tested; the strength test method is carried out with reference to GB / T 6569-2006; the impact toughness test method is carried out with reference to the group standard "Passenger Car Carbon Ceramic Brake Disc Product Standard and Test Method", and the results are shown in Table 1.

[0117] Table 1 Comparison of average area of ​​brake disc edge drop in Examples 1-3 and Comparative Example 1

[0118]

[0119] It can be seen from Table 1 that the average area of ​​the edge drop region in Examples 1-3 of the present application is smaller than the average area of ​​the edge drop region in Comparative Example 1. This indicates that the friction layer can be protected by providing a protruding structure, especially the edge region of the friction layer can be effectively protected, thereby reducing the risk of cracking and falling of the friction layer caused by impact, thereby increasing the service life of the brake disc.

[0120] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0121] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0122] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0123] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A brake disc, characterized in that: include: A substrate, comprising a first surface and a second surface arranged opposite to each other, wherein edges of the first surface and / or the second surface are provided with a protruding structure; Wherein, the protruding structure protrudes toward the thickness direction of the substrate.

2. The brake disc according to claim 1, characterized in that: The matrix is ​​a ring structure; The protruding structure is disposed on at least one side edge of the first surface; And / or, the protruding structure is provided on at least one side edge of the second surface.

3. The brake disc according to claim 2, characterized in that: The outer diameter of the substrate is R, and the width of the protruding structure located at the edge of one side of the first surface or the second surface is d, wherein 0.05%R≤d≤3%R.

4. The brake disc according to claim 3, characterized in that 1mm≤d≤15mm.

5. The brake disc according to any one of claims 2 to 4, characterized in that: Also includes a friction layer; The friction layer is arranged on the first surface and / or the second surface; The friction layer and the protruding structure are arranged on the same side of the substrate, and the friction layer and the protruding structure respectively cover different areas of the first surface and / or the second surface.

6. The brake disc according to claim 5, characterized in that The thickness of the friction layer is D1, the thickness of the protrusion structure is D2, and D2≥D1.

7. The brake disc according to claim 2, characterized in that 0≤D2-D1≤2mm; and / or, 0.2mm≤D1≤3mm, 0.2mm≤D2≤3mm.

8. The brake disc according to claim 5, characterized in that: The protrusion structure and the friction layer are made of different materials.

9. The brake disc according to claim 8, characterized in that The impact toughness of the protrusion structure is greater than the impact toughness of the friction layer.

10. The brake disc according to claim 1, characterized in that The protruding structure is integrally formed with the base.

11. The brake disc according to claim 5, characterized in that The friction layer includes a first friction layer and a second friction layer, and the protrusion structure includes a first protrusion structure and a second protrusion structure; wherein the first friction layer and the first protrusion structure are arranged on the first surface, and the first protrusion structure is located at least one side edge of the first surface; and the second friction layer and the second protrusion structure are arranged on the second surface, and the second protrusion structure is located at least one side edge of the second surface.

12. The brake disc according to claim 11, characterized in that The first protrusion structure includes a first sub-protrusion structure and a second sub-protrusion structure; wherein the first sub-protrusion structure is located at the inner edge of the first surface, the second sub-protrusion structure is located at the outer edge of the first surface, and the first friction layer is arranged between the first sub-protrusion structure and the second sub-protrusion structure.

13. The brake disc according to claim 11, characterized in that The second protrusion structure includes a third sub-protrusion structure and a fourth sub-protrusion structure; wherein the third sub-protrusion structure is located at the inner edge of the second surface, the fourth sub-protrusion structure is located at the outer edge of the second surface, and the second friction layer is arranged between the third sub-protrusion structure and the fourth sub-protrusion structure.

14. The brake disc according to claim 5, characterized in that A contact surface is formed between the adjacent friction layers and the protrusion structures; The angle between the contact surface and the first surface is α, 60°≤α≤90°.

15. The brake disc according to claim 9, characterized in that The protrusion structure has a strength of 80-130 MPa and an impact toughness of 10-40 kJ / m 2 .

16. A brake, characterized in that: Comprising a brake disc as described in any one of claims 1-15.

17. A vehicle, characterized in that: Comprising a brake as claimed in claim 16.

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