Diamond compact hard alloy matrix

Abstract

The utility model relates to the technical field of drilling tools, in particular to a diamond compact hard alloy matrix, which comprises a matrix main body, at least one lateral groove is arranged on the top edge of the matrix main body, and the bottom wall of the lateral groove is respectively connected with the top surface of the matrix main body and the side wall of the matrix main body. And at least part of the bottom wall of the side groove is a smooth curved surface. By designing the lateral grooves, the bonding area between the diamond and the hard alloy base body is increased, the bonding force between the diamond and the hard alloy base body is higher, the lateral grooves are formed in the sides of the composite sheet, the overall lateral impact resistance of the composite sheet is greatly improved, and the risk that the diamond falls off from the composite sheet is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of drilling tool, concretely relates to a diamond compact hard alloy base body. BACKGROUND

[0002] In the field of industrial production and resource exploitation, diamond compact has a pivotal position due to its excellent performance. Diamond compact is composed of polycrystalline diamond layer and hard alloy base body, and is a kind of superhard composite material. In recent years, with the continuous and rapid development of various industries, higher requirements are put forward for the performance of diamond compact. Under the premise of ensuring the service life and cutting efficiency, new demands for the impact resistance of the compact and the adaptability to different geological conditions are put forward by the market.

[0003] In order to further improve the performance of diamond compact, researchers have made many explorations in the design of hard alloy base body interface structure. Most of the early hard alloy base body interface structures are mainly designed for flat compact, and with the progress of technology, arc-shaped alloy base body has appeared in recent years. This new design solves the problem of large pressure difference between the center and the edge of the hard alloy base body to a certain extent, effectively enhances the bonding force between diamond and hard alloy base body, and thus improves the axial impact resistance of the compact to a certain extent.

[0004] However, although the arc-shaped alloy base body has made certain technical breakthroughs, the current diamond compact still has obvious defects. The overall lateral impact resistance of the current diamond compact is weak, and in the actual cutting process, the diamond layer is easy to fall off from the hard alloy base body, which not only affects the service life of the diamond compact, but also adversely affects the production efficiency and cost control.

[0005] Therefore, how to solve the above-mentioned problems of the current diamond compact, that is, the overall lateral impact resistance of the current diamond compact is weak, has become the research topic of the utility model. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing a diamond compact hard alloy base body.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] A diamond compact hard alloy base body, comprising a base body, at least one lateral groove is arranged on the top edge of the base body, and the bottom wall of the lateral groove is respectively connected with the top surface of the base body and the side wall of the base body.

[0009] At least part of the bottom wall of the lateral groove is a smooth curved surface.

[0010] In the above scheme, by designing the side groove, the bonding area between the diamond and the cemented carbide substrate (which can also be referred to as the substrate body) is increased, so that the bonding force between the diamond and the cemented carbide substrate is stronger, and the side groove is arranged at the side of the composite sheet, which greatly improves the lateral impact resistance of the composite sheet as a whole and reduces the risk of diamond falling off the composite sheet.

[0011] Optionally, the bottom wall of the side groove is a smooth curved surface.

[0012] It should be emphasized that the arrangement of the smooth curved surface can make the stress transmission more uniform. When the diamond composite sheet is working, it will be subjected to various forces. If the bottom wall of the side groove is a flat surface or has edges and corners, the stress may be concentrated at these positions, resulting in cracks or even separation at the bonding position between the diamond layer and the cemented carbide substrate. However, the smooth curved surface can disperse the stress, so that the force can be uniformly conducted along the curved surface, thereby enhancing the bonding stability between the diamond layer and the cemented carbide substrate and improving the overall performance and service life of the composite sheet.

[0013] In a further technical solution, at least one of the area on the bottom wall of the side groove for abutting the side wall of the substrate body and the area on the side wall of the substrate body for abutting the bottom wall of the side groove is provided with a reverse R corner, and / or at least one of the area on the bottom wall of the side groove for abutting the top surface of the substrate body and the area on the top surface of the substrate body for abutting the bottom wall of the side groove is provided with a reverse R corner.

[0014] The reverse R corner has the following effects:

[0015] On the one hand, the stress concentration phenomenon at the abutting area can be alleviated, and the stress can be more uniformly distributed on the bonding surface, thereby improving the overall stability of the composite sheet.

[0016] On the other hand, a larger effective contact area is provided for the diamond layer and the cemented carbide substrate. During production, the diamond layer and the cemented carbide substrate are combined through processes such as high temperature and high pressure. A larger contact area is beneficial for atomic diffusion and bonding, so that the combination is more firm, thereby improving the performance and service life of the composite sheet.

[0017] In a further technical solution, the side grooves are arranged in multiple numbers, and each of the side grooves is uniformly distributed in the circumferential direction of the substrate body.

[0018] The arrangement in this part promotes uniform distribution of stress, further enhances the bonding stability between the diamond layer and the cemented carbide substrate, and improves the overall performance and service life of the composite sheet.

[0019] In a further technical solution, the top surface of the substrate body is an arc surface.

[0020] The arc-shaped surface solves the problem of large pressure difference between the center and the edge of the hard alloy base, enhances the bonding force between the diamond and the hard alloy base, and improves the axial impact resistance of the composite sheet.

[0021] Further, the top center of the base body is provided with a first protruding piece.

[0022] The first protruding piece further increases the area of the bonding surface between the diamond layer and the hard alloy base, further enhances the bonding force between the diamond and the hard alloy base, and improves the overall performance and service life of the composite sheet.

[0023] It should be emphasized that the first protruding piece is arranged at the top center of the base body, and when the composite sheet is subjected to external force during work, the first protruding piece at the top center of the base body can act as a stress concentration point to more evenly disperse the external force to the surrounding, avoiding excessive local stress in the center area, thereby improving the ability of the composite sheet to resist failure forms such as cracking.

[0024] Further, the center area of the top surface of the base body is recessed downward to form a center groove, and at least part of the first protruding piece is inside the center groove.

[0025] The center groove further increases the area of the bonding surface between the diamond layer and the hard alloy base, further enhances the bonding force between the diamond and the hard alloy base, and improves the overall performance and service life of the composite sheet.

[0026] Further, the top end area of the base body is provided with at least one communication groove, and the communication groove respectively communicates with the inner side space of the center groove and the outer side space of the side wall of the base body.

[0027] The communication groove communicates the inner side space of the center groove and the outer side space of the side wall of the base body, disperses the axial impact stress of the hard alloy base during work, and also increases the contact area of the hard alloy base and the diamond.

[0028] Further, the communication groove is provided as a plurality of communication grooves, and each communication groove is uniformly distributed in the circumferential direction of the base body.

[0029] This part further improves the performance of the hard alloy base in resisting axial impact stress.

[0030] Further, the top of the base body is provided with a plurality of second protruding pieces, and each second protruding piece is uniformly distributed in the circumferential direction of the base body.

[0031] The settings in this part make the hard alloy base better disperse and eliminate the circumferential stress during the rotary cutting process, and further increase the contact area of the diamond and the hard alloy base and improve the bonding force therebetween.

[0032] In a further aspect, the top of the base body is provided with a plurality of third protruding pieces, and each of the third protruding pieces is uniformly distributed in the circumferential direction of the base body.

[0033] Each of the third protruding pieces is on the inner side or the outer side of the area enclosed by each of the second protruding pieces, and the positions of the third protruding pieces and the second protruding pieces are staggered.

[0034] Each of the second protruding pieces in the above part constitutes a circle of protruding structures, and each of the third protruding pieces can constitute another circle of protruding structures, and the effects of setting two circles of protruding structures are as follows.

[0035] On the one hand, the multiple circles of protruding structures are equivalent to setting multiple stress concentration and buffer areas, and when subjected to external force, the stress can be gradually transmitted and dispersed between the protruding structures of different circles, forming a more complex stress distribution path, which can more effectively disperse the stress to each area of the entire composite sheet, reduce the case of excessively high local stress, and improve the ability of the composite sheet to resist various complex external forces.

[0036] On the other hand, the multiple circles of protruding structures can provide support at different radius positions of the composite sheet, and better support effects can be obtained from the edge to the central area, which can more effectively maintain the shape and structural integrity of the composite sheet when subjected to large vertical pressure or uneven pressure, thereby reducing the risk of deformation or rupture of the composite sheet.

[0037] As for the "first", "second", etc. used herein, it does not mean to particularly indicate the order or sequence, nor to limit the present case, but only to distinguish the components or operations described by the same technical terms.

[0038] As for the "connection" or "positioning" used herein, it can mean that two or more components or devices are in direct physical contact with each other or in indirect physical contact with each other, or can mean that two or more components or devices operate or act on each other.

[0039] As for the "contain", "include", "have", etc. used herein, they are all open terms, that is, they mean to contain but not limited to.

[0040] As for the words (terms) used herein, except for special indications, they generally have the usual meanings of each word used in this field, in the content of the present case, and in the special content. Some words used to describe the present case will be discussed below or elsewhere in the specification to provide additional guidance for those skilled in the art on the description of the present case.

[0041] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0042] The working principle and advantages of this utility model are as follows: A diamond composite sheet is formed by a cemented carbide matrix and diamond. By designing a side groove, the bonding area between the diamond and the cemented carbide matrix is ​​increased, making the bonding force between the diamond and the cemented carbide matrix stronger. Moreover, the side groove is set on the side of the composite sheet, which greatly improves the overall lateral impact resistance of the composite sheet and reduces the risk of the diamond falling off the composite sheet. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of a diamond composite sheet cemented carbide matrix according to an embodiment of the present invention;

[0044] Figure 2 This is an embodiment of the present utility model. Figure 1 Top view of the cemented carbide matrix of the medium diamond composite sheet;

[0045] Figure 3 This is an embodiment of the present utility model. Figure 1 Front view of the cemented carbide matrix of the medium diamond composite sheet;

[0046] Figure 4 This is a schematic diagram of the structure of another diamond composite sheet cemented carbide matrix according to an embodiment of the present invention;

[0047] Figure 5 This is an embodiment of the present utility model. Figure 4 Top view of the cemented carbide matrix of the medium diamond composite sheet;

[0048] Figure 6 This is an embodiment of the present utility model. Figure 4 Front view of the cemented carbide matrix of the medium diamond composite sheet.

[0049] In the above figures: 1. Main body of the base; 2. Side groove; 21. Third R-angle area; 3. First protrusion; 4. Central groove; 5. Connecting groove; 51. Second R-angle area; 6. Second protrusion; 7. Third protrusion; 71. First R-angle area. Detailed Implementation

[0050] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0051] Embodiment: The following will be clearly explained to the present case with the figure and detailed description, any person skilled in the art after understanding the embodiment of the present case, when can be taught by the technology of the present case, to change and modify, it does not deviate from the spirit and scope of the present case.

[0052] The terms used herein are only for describing specific embodiments, and are not intended to limit the present case. The singular form such as "a", "this", "this", "this" and "this", as used herein, also includes the plural form.

[0053] Reference Figures 1-6 A diamond compact hard alloy substrate, comprising a substrate body 1, at least one side groove 2 is arranged on the top edge of the substrate body 1, and the bottom wall of the side groove 2 is respectively connected with the top surface of the substrate body 1 and the side wall of the substrate body 1.

[0054] At least part of the bottom wall of the side groove 2 is a smooth curved surface.

[0055] In some embodiments, the substrate body 1 is approximately cylindrical in structure, in which case the cross-sectional diameter can be 17.8 mm and the height can be 12 mm.

[0056] In some embodiments, the depth of the side groove 2 (also referred to as the maximum depth of each region, as described below) is 0.5-2 mm (such as 1 mm).

[0057] In some embodiments, the number of side grooves 2 is four.

[0058] By designing the side groove 2, the bonding area between the diamond (or diamond layer) and the hard alloy substrate (or substrate body 1) is increased, so that the bonding force between the diamond and the hard alloy substrate is stronger, and the side groove 2 is arranged on the side of the compact, which greatly improves the overall lateral impact resistance of the compact and reduces the risk of diamond falling off the compact.

[0059] Optionally, the bottom wall of the side groove 2 is a smooth curved surface.

[0060] It should be emphasized that the arrangement of the smooth curved surface can make the stress transmission more uniform. When the diamond compact is working, it will be subjected to various forces. If the bottom wall of the side groove 2 is a flat surface or has edges and corners, the stress may be concentrated at these positions, resulting in cracks or even separation of the diamond layer and the hard alloy substrate. The smooth curved surface can disperse the stress, so that the force can be uniformly conducted along the curved surface, thereby enhancing the bonding stability between the diamond layer and the hard alloy substrate and improving the overall performance and service life of the compact.

[0061] Reference Figure 1 , Figure 4In the embodiment, at least one of the region of the bottom wall of the side groove 2 for abutting with the side wall of the base body 1 and the region of the side wall of the base body 1 for abutting with the bottom wall of the side groove 2 is provided with a reverse R corner, and / or at least one of the region of the bottom wall of the side groove 2 for abutting with the top surface of the base body 1 and the region of the top surface of the base body 1 for abutting with the bottom wall of the side groove 2 is provided with a reverse R corner.

[0062] Optionally, the region of the bottom wall of the side groove 2 for abutting with the side wall of the base body 1 and the region of the bottom wall of the side groove 2 for abutting with the top surface of the base body 1 are provided with a reverse R corner.

[0063] The reverse R corner has the following effects:

[0064] On the one hand, the stress concentration phenomenon at the abutting region can be alleviated, and the stress is more evenly distributed on the bonding surface, thereby improving the overall stability of the composite sheet.

[0065] On the other hand, a larger effective contact area is provided between the diamond layer and the cemented carbide base. In the production process, the diamond layer and the cemented carbide base are combined through high temperature and high pressure processes. A larger contact area is beneficial to the diffusion and bonding between atoms, so that the combination is more firm, thereby improving the performance and service life of the composite sheet.

[0066] Referring to Figure 2 , Figure 5 In the embodiment, the side grooves 2 are provided in plurality, and the side grooves 2 are uniformly distributed in the circumferential direction of the base body 1.

[0067] The arrangement in the embodiment promotes uniform distribution of stress, further enhances the bonding stability between the diamond layer and the cemented carbide base, and improves the overall performance and service life of the composite sheet.

[0068] Referring to Figure 3 , Figure 6 In the embodiment, the top surface of the base body 1 is an arc surface.

[0069] Optionally, the top surface of the base body 1 is upwardly convex.

[0070] Optionally, the top surface of the base body 1 is downwardly concave.

[0071] Optionally, the top surface of the base body 1 is a hemispherical surface.

[0072] For the convenience of description, the top surface of the base body 1 is described as being upwardly convex in the present application.

[0073] The arc-shaped surface solves the problem of large pressure difference between the center and the edge of the hard alloy base, enhances the bonding force between the diamond and the hard alloy base, and improves the impact resistance of the composite piece in the axial direction.

[0074] Referring to Figure 2 In the embodiment, the first protruding piece 3 is arranged at the top center of the base body 1.

[0075] In some embodiments, the top surface of the first protruding piece 3 is an arc surface.

[0076] In some embodiments, the cross-sectional diameter of the first protruding piece 3 is 5 mm, and the height of the first protruding piece 3 is 0.3 mm.

[0077] In some embodiments, the projections of the base body 1 and the first protruding piece 3 in the vertical direction are both circular, and the diameter of the projection of the base body 1 is 3 to 4 times the diameter of the projection of the first protruding piece 3.

[0078] The arrangement of the first protruding piece 3 further increases the area of the bonding surface between the diamond layer and the hard alloy base, further enhances the bonding force between the diamond and the hard alloy base, and improves the overall performance and service life of the composite piece.

[0079] It should be emphasized that the first protruding piece 3 is arranged at the top center of the base body 1, and when the composite piece is subjected to external force during work, the first protruding piece 3 at the top center of the base body 1 can act as a stress concentration point to more evenly disperse the external force to the surrounding, avoiding excessive local stress in the center area, thereby improving the ability of the composite piece to resist failure forms such as cracking.

[0080] Referring to Figure 2 In the embodiment, the center area of the top surface of the base body 1 is recessed downward to form a center groove 4, and at least part of the first protruding piece 3 is inside the center groove 4.

[0081] In some embodiments, in the vertical direction, the projection of the center groove 4 and the projection of the first protruding piece 3 form a circular ring structure, and the spacing between the inner circle and the outer circle of the circular ring structure is 0.5-2 mm (such as 1 mm).

[0082] In some embodiments, the depth of the center groove 4 is 0.3-0.5 mm.

[0083] The above 0.5-2 mm is used as an example to represent 0.5 mm-2 mm.

[0084] The center groove 4 further increases the area of the bonding surface between the diamond layer and the cemented carbide substrate, further enhances the bonding force between the diamond and the cemented carbide substrate, and improves the overall performance and service life of the composite plate.

[0085] It should be noted that the center groove 4 is also arranged in the center area of the top surface of the substrate body 1, and the effect is as described above for the first protruding part 3.

[0086] Referring to Figure 2 In this embodiment, at least one communication groove 5 is arranged in the top end area of the substrate body 1, and the communication groove 5 respectively communicates with the inner side space of the center groove 4 and the outer side space of the sidewall of the substrate body 1.

[0087] In some embodiments, the communication groove 5 is arranged as four or six.

[0088] In some embodiments, the width of the communication groove 5 is 0.8mm and the depth is 0.3mm.

[0089] The communication groove 5 disperses the axial impact stress of the cemented carbide substrate during work by communicating the inner side space of the center groove 4 and the outer side space of the sidewall of the substrate body 1, and also increases the contact area of the cemented carbide substrate and the diamond.

[0090] Referring to Figure 2 In this embodiment, the communication grooves 5 are arranged in multiple, and each of the communication grooves 5 is uniformly distributed in the circumferential direction of the substrate body 1.

[0091] This embodiment further improves the performance of the cemented carbide substrate in resisting axial impact stress.

[0092] Referring to Figure 1 In this embodiment, a plurality of second protruding parts 6 are arranged on the top of the substrate body 1, and each of the second protruding parts 6 is uniformly distributed in the circumferential direction of the substrate body 1.

[0093] In some embodiments, the second protruding part 6 is arranged as four or six.

[0094] In some embodiments, the number of second protruding parts 6 is the same as the number of communication grooves 5 and the number of side grooves 2; in some cases, in the circumferential direction of the first protruding part 3, the position of each second protruding part 6 corresponds to the position of each side groove 2, and without considering the vertical space and without considering the shape difference between the two, the projection of the two can be considered to coincide.

[0095] In some embodiments, a single second protruding part 6 and two third protruding parts 7 are arranged between any two adjacent communication grooves 5.

[0096] In some embodiments, the second protruding piece 6 and the third protruding piece 7 are of the same shape and size, and the second protruding piece 6 is taken as an example, a second arc is arranged between two adjacent communicating grooves 5, the second arc has the same center as the first arc, and the arc length of the second arc is 3 to 4 times the arc length of the first arc.

[0097] The arrangement in the embodiment can better disperse and eliminate circumferential stress of the cemented carbide substrate during rotary cutting, and further increase the contact area of the diamond and the cemented carbide substrate and improve the bonding force therebetween.

[0098] Referring to Figure 1 In the embodiment, the top of the substrate body 1 is provided with a plurality of third protruding pieces 7, and the third protruding pieces 7 are uniformly distributed in the circumferential direction of the substrate body 1.

[0099] The third protruding pieces 7 are located inside or outside the area enclosed by the second protruding pieces 6.

[0100] In some embodiments, the third protruding piece 7 is provided as eight or twelve.

[0101] In some embodiments, the third protruding piece 7 is located outside the area enclosed by the second protruding piece 6, and the number of the third protruding pieces 7 is twice the number of the second protruding pieces 6; meanwhile, in the circumferential direction of the first protruding piece 3, the projection of any second protruding piece 6 is located between the projections of two adjacent third protruding pieces 7; it is emphasized that, in this case, the position and shape of the second protruding piece 6 can be adjusted according to actual conditions; in some cases, in the vertical direction, the projection of the second protruding piece 6 is located between the outer circle of the central groove 4 and the edge of the area enclosed by the third protruding pieces 7 (which can be the center).

[0102] For the convenience of understanding, the above content is supplemented, and the second protruding piece 6 is taken as an example, the second protruding piece 6 is provided as a square structure, and the center point thereof is taken as a reference for calculating the distance between the second protruding piece 6 and other structures.

[0103] The second protruding piece 6 in the above embodiment constitutes a circle of protruding structures, and the third protruding piece 7 can constitute another circle of protruding structures, and the effects of arranging two circles of protruding structures are as follows:

[0104] In some embodiments, the edge of the third protruding piece 7 is provided with a reverse R angle to form a first R angle area 71, the edge of the communicating groove 5 is provided with a reverse R angle to form a second R angle area 51, and the area of the bottom wall of the side groove 2 for connecting with the side wall of the substrate body 1 and the area of the bottom wall of the side groove 2 for connecting with the top surface of the substrate body 1 are both provided with a reverse R angle to form a third R angle area 21; the first R angle area 71 is taken as an example, and the corresponding radius at the first R angle area 71 is 0.1-2 mm.

[0105] In some embodiments, the corresponding radius at the first R-angle region 71 is 0.15mm, the corresponding radius at the second R-angle region 51 is 0.2mm, and the corresponding radius at the third R-angle region 21 is 0.5mm.

[0106] In some embodiments, the top surface of each third protruding piece 7 is on the same arc surface as the top surface of each second protruding piece 6.

[0107] In some embodiments, the height of each third protruding piece 7 and each second protruding piece 6 is 0.3-1mm.

[0108] On the one hand, the multi-circle protruding structure is equivalent to setting multiple stress concentration and buffer regions. When subjected to external force, stress can be gradually transmitted and dispersed between protrusions of different circles, forming a more complex stress distribution path, which can more effectively disperse stress to each region of the entire composite sheet, reduce the situation of excessive local stress, and improve the ability of the composite sheet to resist various complex external forces.

[0109] On the other hand, the multi-circle protruding structure can provide support at different radius positions of the composite sheet, and better support effect can be obtained from the edge to the central region. When subjected to large vertical pressure or uneven pressure, the multi-circle protruding structure can more effectively maintain the shape and structural integrity of the composite sheet, and reduce the risk of deformation or rupture of the composite sheet.

[0110] Optionally, three or more circles of protruding structures can be provided, and the specific setting method and setting effect are as described above.

[0111] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A polycrystalline diamond compact cemented carbide substrate, characterized in that: The base body (1) is provided with at least one side groove (2) on the top edge, and the bottom wall of the side groove (2) is connected with the top surface of the base body (1) and the side wall of the base body (1) respectively; At least part of the bottom wall of the side groove (2) is a smooth curved surface; The top center of the base body (1) is provided with a first protruding part (3).

2. The polycrystalline diamond compact cemented carbide substrate of claim 1, wherein: At least one of the area on the bottom wall of the side groove (2) for connecting with the side wall of the base body (1) and the area on the side wall of the base body (1) for connecting with the bottom wall of the side groove (2) is provided with a reverse R corner, and / or at least one of the area on the bottom wall of the side groove (2) for connecting with the top surface of the base body (1) and the area on the top surface of the base body (1) for connecting with the bottom wall of the side groove (2) is provided with a reverse R corner.

3. The PCD hard metal substrate of claim 1, wherein: The maximum depth of each area of the side groove (2) ranges from 0.5mm to 2mm.

4. The PCD hard metal substrate of any one of claims 1-3, wherein: The top surface of the base body (1) is an arc surface.

5. The PCD hard metal substrate of claim 1, wherein: The central area of the top surface of the base body (1) is recessed downward to form a central groove (4), and at least part of the first protruding part (3) is inside the central groove (4).

6. The polycrystalline diamond compact cemented carbide substrate of claim 5, wherein: The top end area of the base body (1) is provided with at least one communication groove (5) which respectively communicates with the inside space of the central groove (4) and the outside space of the side wall of the base body (1).

7. The PCD hard metal substrate of any one of claims 1-3, wherein: The top of the base body (1) is provided with a plurality of second protruding parts (6), and each second protruding part (6) is uniformly distributed in the circumferential direction of the base body (1).

8. The polycrystalline diamond compact cemented carbide substrate of claim 7, wherein: The top of the base body (1) is provided with a plurality of third protruding parts (7), and each third protruding part (7) is uniformly distributed in the circumferential direction of the base body (1); Each third protruding part (7) is inside or outside the area enclosed by each second protruding part (6), and the positions of the third protruding part (7) and the second protruding part (6) are staggered.

9. The polycrystalline diamond compact cemented carbide substrate of claim 8, wherein: The edge of the third protruding part (7) is provided with a reverse R corner to form a first R corner area (71); Both the area on the bottom wall of the side groove (2) for connecting with the side wall of the base body (1) and the area on the bottom wall of the side groove (2) for connecting with the top surface of the base body (1) are provided with a reverse R corner to form a third R corner area (21); The corresponding radius at the first R corner area (71) ranges from 0.1mm to 2mm; The corresponding radius at the third R corner area (21) is 0.5mm.

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