Hard alloy matrix with wavy interface and diamond compact

Abstract

The utility model discloses a hard alloy matrix with a wave-shaped interface and a diamond compact, the hard alloy matrix comprises a matrix body, the top end face of the matrix body is in a circular arc shape, and wave crests and wave troughs are formed on the top end face of the matrix body; the annular reinforcing belt is arranged around the periphery of the base body; a first groove is formed in the end face of the top end of the annular reinforcing band, a second groove is formed in the end face of the top end of the base body, and the first groove and the second groove are connected to form the connecting groove. According to the utility model, the hard alloy matrix can form a staggered occlusion interface with the diamond layer through the wave crests, the wave troughs and the connecting grooves, so that impact stress can be dispersed, crack propagation can be inhibited, and circumferential binding force can be enhanced and lateral stripping of the diamond layer can be inhibited through the annular reinforcing band; the service life of the diamond compact formed by combining the hard alloy matrix and the diamond layer is remarkably prolonged under the extreme impact load, the failure mode is converted into progressive abrasion from layering, and the practical working condition applicability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to superhard material manufacturing technical field, especially a kind of hard alloy base body and diamond compact with wavy interface. BACKGROUND

[0002] Diamond compact is a kind of superhard material synthesized by artificial diamond micro powder and hard alloy under high temperature and high pressure, not only has the high wear resistance and high hardness of diamond, also has the excellent impact resistance and weldability of hard alloy, so it is widely used in petroleum drilling, natural gas exploitation and geological drilling etc.

[0003] The hard alloy base body of traditional diamond compact adopts plane or simple arc surface interface, and the interface bonding force is dependent on single, so that the geometric structure of hard alloy base body and diamond is prone to delamination failure under impact load.

[0004] Thus, the prior art needs to be improved and improved. UTILITY MODEL CONTENT

[0005] In view of the above deficiencies of the prior art, the utility model aims at providing a kind of hard alloy base body and diamond compact with wavy interface, to solve the problem that the hard alloy base body of traditional diamond compact in prior art adopts plane or simple arc surface interface, and the interface bonding force is dependent on single, so that the geometric structure of hard alloy base body and diamond is prone to delamination failure under impact load.

[0006] The technical scheme adopted by the utility model to solve technical problems is as follows:

[0007] In the first aspect, the utility model embodiment provides a kind of hard alloy base body with wavy interface, comprising:

[0008] Base body, the top end face of the base body is arc-shaped, and the top end face of the base body is formed with wave crest and wave trough;

[0009] Annular reinforcing band, the annular reinforcing band is arranged around the outer periphery of the base body;

[0010] Connecting groove, the top end face of the annular reinforcing band is equipped with first recess, the top end face of the base body is equipped with second recess, the first recess is connected with the second recess to form the connecting groove.

[0011] As further improved technical scheme, the top end face of the base body is formed with multiple wave crests and wave troughs distributed along the same direction, the height of each wave crest gradually decreases from middle to both sides, and along the height decreasing direction of the wave crest, the depth of each wave trough is adjusted to be 50%-80% of the height of adjacent wave crest.

[0012] As a further improved technical solution, the top end face of the base body is provided with 7-21 wave crests and wave troughs, the wave crest in the center has a height of 1mm-5mm, and each wave crest height decreases by 0.2mm-0.5mm.

[0013] As a further improved technical solution, the length of each wave crest decreases from the middle to both sides, and the wave crest top and the wave trough bottom are both transitioned by a circular arc.

[0014] As a further improved technical solution, the base body is cylindrical, and the thickness of the annular reinforcing band is 10%-15% of the diameter of the base body.

[0015] As a further improved technical solution, the annular reinforcing band is integrally formed with the base body.

[0016] As a further improved technical solution, the first groove and the second groove are both arc-shaped grooves.

[0017] As a further improved technical solution, the curvature radius of the bottom of the first groove and the second groove is 3mm, and the recess radius of the first groove and the second groove is 1-4mm.

[0018] As a further improved technical solution, the connecting groove is provided with one or more pairs, and each pair of connecting grooves is symmetrically distributed.

[0019] In a second aspect, the utility model further provides a diamond compact, which comprises a diamond layer and a hard alloy base body with a wave-shaped interface as described in any one of the above embodiments; wherein one side of the diamond layer is provided with a complementary structure, and the diamond layer is arranged on the top end face of the base body through the complementary structure and is attached to the wave crest, the wave trough, the annular reinforcing band and the connecting groove.

[0020] Compared with the prior art, the embodiment of the utility model has the following advantages: the utility model discloses a kind of hard alloy matrix with wave-shaped interface, comprising: matrix body, the top end face of the matrix body is arc-shaped, and the top end face of the matrix body is formed with wave crest and wave trough;Annular reinforcing band, the annular reinforcing band is arranged around the periphery of the matrix body;Connecting groove, the first recess of the top end face of the annular reinforcing band is equipped with, the top end face of the matrix body is equipped with second recess, the first recess is connected with the second recess to form the connecting groove.In the utility model, the hard alloy matrix can be formed by wave crest, wave trough and connecting groove and diamond layer staggered occlusion interface, can disperse impact stress, inhibit crack propagation, and through annular reinforcing band enhances circumferential binding force and inhibits diamond layer lateral peeling, hard alloy matrix and diamond layer combined to form diamond composite piece under extreme impact load life is significantly extended, failure mode changes from delamination to progressive wear, improves actual working condition applicability. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a first three-dimensional structure schematic view of the hard alloy matrix with wave-shaped interface provided by the utility model.

[0022] Figure 2 It is a second three-dimensional structure schematic view of the hard alloy matrix with wave-shaped interface provided by the utility model.

[0023] Figure 3 It is a third three-dimensional structure schematic view of the hard alloy matrix with wave-shaped interface provided by the utility model.

[0024] Figure 4 It is a front view of the hard alloy matrix with wave-shaped interface provided by the utility model.

[0025] Figure 5 It is a structure schematic view of diamond composite piece provided by the utility model.

[0026] In the drawing: 1, matrix body;101, wave crest;102, wave trough;2, annular reinforcing band;3, connecting groove;301, first recess;302, second recess;4, diamond layer. DETAILED DESCRIPTION

[0027] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.

[0028] Embodiment one:

[0029] Please see Figures 1-4 As shown. The hard alloy substrate with a wavy interface includes: a substrate body 1, the top end face of which is arc-shaped and has crests 101 and troughs 102; an annular reinforcing band 2, which surrounds the outer periphery of the substrate body 1; and a connecting groove 3, the top end face of the annular reinforcing band 2 having a first groove 301 and the top end face of the substrate body 1 having a second groove 302, the first groove 301 and the second groove 302 being connected to form the connecting groove 3.

[0030] like Figure 1 and Figure 4 As shown, in this embodiment, the cemented carbide substrate with a wavy interface includes a substrate body 1 and an annular reinforcing band 2; wherein, the top end face of the substrate body 1 is arc-shaped and convex upward, with the highest convexity at the center of the top end face of the substrate body 1, and the convexity gradually decreasing outward from the center of the substrate body 1; the top end face of the substrate body 1 forms alternating peaks 101 and troughs 102, which are used to engage with the diamond layer 4, thereby enhancing the structural stability between the cemented carbide substrate and the diamond layer 4; The annular reinforcing band 2 is arranged around the outer periphery of the substrate body 1 to enhance the circumferential bonding force and suppress the lateral peeling of the diamond layer 4. The top end face of the annular reinforcing band 2 is provided with a first groove 301, and the top end face of the substrate body 1 is provided with a second groove 302. The first groove 301 and the second groove 302 are connected to form the connecting groove 3. Therefore, the connecting groove 3 has two sections. The first groove 301 is recessed vertically, and the second groove 302 is recessed horizontally. The impact load on the cemented carbide substrate can be dispersed vertically and horizontally, thereby enhancing the compressive strength.

[0031] In this invention, the cemented carbide substrate can form an interlocking interface with the diamond layer 4 through the crests 101, troughs 102 and connecting grooves 3, which can disperse impact stress and inhibit crack propagation. The annular reinforcing band 2 enhances the circumferential bonding force and inhibits the lateral peeling of the diamond layer 4. The diamond composite sheet composed of the cemented carbide substrate and the diamond layer 4 has a significantly extended life under extreme impact loads, and the failure mode changes from delamination to progressive wear, improving its applicability to actual working conditions.

[0032] like Figure 2 and Figure 3As shown, as a further embodiment, the top end face of the substrate body 1 is formed with multiple peaks 101 and valleys 102 distributed in the same direction. The height of each peak 101 decreases sequentially from the middle to both sides, and along the direction of the decrease in the height of the peak 101, the depth of each valley 102 is synchronously adjusted to 50%-80% of the height of the adjacent peak 101.

[0033] Specifically, the top end face of the substrate 1 has multiple alternating peaks 101 and troughs 102 distributed in the same direction. The peak 101 in the middle is the highest, and the height of the peaks 101 decreases sequentially from the middle peak 101 to the peaks 102 on both sides. For example, if the height of the middle peak 101 is 1.5 mm, then the height of the first peak 101 to the left of the middle peak 101 is 1.4 mm, the height of the first peak 101 to the right of the middle peak 101 is 1.4 mm, the height of the second peak 101 to the left of the middle peak 101 is 1.3 mm, the height of the second peak 101 to the right of the middle peak 101 is 1.3 mm, the height of the third peak 101 to the left of the middle peak 101 is 1.2 mm, and the height of the third peak 102 to the right of the middle peak 101 is 1.2 mm. The height of the crest 101 is 1.2 mm. Simultaneously, the height of each trough 102 decreases along with the adjacent crest 101. For example, if the height of the middle crest 101 is 1.5 mm, then the depth of the troughs 102 on either side of the middle crest 101 is 1.2 mm. If the height of the first crest 101 to the left of the middle crest 101 is 1.4 mm, then the depth of the trough 102 to the left of the first crest 101 to the left of the middle crest 101 is 1.1 mm. If the height of the first crest 101 to the right of the middle crest 101 is 1.4 mm, then the depth of the trough 102 to the right of the first crest 101 to the right of the middle crest 101 is 1.1 mm. Following the pattern described above, each crest 101 and each trough 102 changes according to this pattern. The specific height and depth are not limited and can be adjusted according to requirements.

[0034] As a further improvement, the top end face of the substrate body 1 is provided with 7-21 peaks 101 and valleys 102, the height of the peaks 101 at the center is 1mm-5mm, and the height of each peak 101 decreases in a gradient of 0.2mm-0.5mm.

[0035] Specifically, the top end face of the substrate body 1 has a total of 7-21 peaks 101 and valleys 102. When the distance between each peak 101 is large, the total number of peaks 101 and valleys 102 is small. When the distance between each peak 101 is small, the number of peaks 101 and valleys 102 is large.

[0036] In this embodiment, the length of each of the wave crests 101 decreases sequentially from the middle to both sides, and the top of the wave crest 101 and the bottom of the wave trough 102 are both rounded to avoid stress concentration caused by sharp edges.

[0037] As a further embodiment, the substrate body 1 is cylindrical, and the thickness of the annular reinforcing band 2 is 10%-15% of the diameter of the substrate body 1, in order to enhance the circumferential bonding force and suppress the lateral peeling of the diamond layer 4.

[0038] As a further improvement, the annular reinforcing strip 2 is integrally formed with the base body 1.

[0039] In this embodiment, both the first groove 301 and the second groove 302 are arc-shaped grooves, which further avoids stress concentration at the connecting groove 3.

[0040] As a further embodiment, the curvature radius of the bottom of the first groove 301 and the second groove 302 is 3mm, and the concavity radius of the first groove 301 and the second groove 302 is 1-4mm.

[0041] As a further embodiment, the connecting grooves 3 may be provided in one or more pairs, with each pair of connecting grooves 3 being symmetrically distributed. For example, the connecting grooves 3 may be provided in one pair, with the two connecting grooves 3 respectively positioned opposite each other on the sides of the lowest wave crest 101; or the connecting grooves 3 may be provided in two pairs, with the four connecting grooves 3 positioned opposite each other and the spacing between adjacent connecting grooves 3 being uniform.

[0042] Example 2:

[0043] like Figure 5 As shown, this embodiment also provides a diamond composite sheet, which includes a diamond layer 4 and a cemented carbide substrate with a wavy interface as described in any one of the above embodiments; wherein, a complementary structure (not shown) is provided on one side of the diamond layer 4, the complementary structure being adapted to the top end face of the crest 101, trough 102, connecting groove 3 and annular reinforcing band 2, the diamond layer 4 being disposed on the top end face of the substrate body through the complementary structure and being in contact with the crest 101, the trough 102, the annular reinforcing band 2 and the connecting groove 3.

[0044] In summary, this utility model embodiment provides a cemented carbide substrate with a wavy interface, comprising: a substrate body 1, the top end face of the substrate body 1 being arc-shaped, and the top end face of the substrate body 1 having wave crests 101 and wave troughs 102; an annular reinforcing band 2, the annular reinforcing band 2 being disposed around the outer periphery of the substrate body 1; and a connecting groove 3, the top end face of the annular reinforcing band 2 having a first groove 301, the top end face of the substrate body 1 having a second groove 302, the first groove 301 and the second groove 302 being connected to form the connecting groove 3. In this invention, the cemented carbide substrate can form an interlocking interface with the diamond layer 4 through the crests 101, troughs 102 and connecting grooves 3, which can disperse impact stress and inhibit crack propagation. The annular reinforcing band 2 enhances the circumferential bonding force and inhibits the lateral peeling of the diamond layer 4. The diamond composite sheet composed of the cemented carbide substrate and the diamond layer 4 has a significantly extended life under extreme impact loads, and the failure mode changes from delamination to progressive wear, improving its applicability to actual working conditions.

[0045] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0050] Of course, the above description of the embodiments of this utility model is quite detailed, but it should not be construed as a limitation on the scope of protection of this utility model. This utility model may have other various implementations. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model. The scope of protection of this utility model is subject to the appended claims.

Claims

1. A cemented carbide substrate having a wavy interface, characterized in that, The utility model relates to a hard alloy substrate with wavy interface, comprising: a base body, the top end face of the base body is in the shape of a circular arc, and the top end face of the base body is formed with wave crests and wave troughs; a ring-shaped reinforcing band, the ring-shaped reinforcing band is arranged around the outer periphery of the base body; a connecting groove, the top end face of the ring-shaped reinforcing band is provided with a first groove, the top end face of the base body is provided with a second groove, and the first groove and the second groove are connected to form the connecting groove.

2. Cemented carbide substrate with a wave-shaped interface according to claim 1, characterized in that The top end face of the base body is formed with a plurality of wave crests and wave troughs distributed in the same direction, the height of each wave crest gradually decreases from the middle to both sides, and along the direction of the decrease in the height of the wave crest, the depth of each wave trough is synchronously adjusted to be 50%-80% of the height of the adjacent wave crest.

3. Cemented carbide substrate with a wave-shaped interface according to claim 2, characterized in that The top end face of the base body is provided with 7-21 wave crests and wave troughs, the height of the wave crest at the center is 1-5mm, and the height of each wave crest decreases by a gradient of 0.2-0.5mm.

4. Cemented carbide substrate with a wave-shaped interface according to claim 2, characterized in that The length of each wave crest gradually decreases from the middle to both sides, and the top of the wave crest and the bottom of the wave trough are both transitioned by a circular arc.

5. Cemented carbide substrate with a wave-shaped interface according to claim 1, characterized in that The base body is in the shape of a cylinder, and the thickness of the ring-shaped reinforcing band is 10%-15% of the diameter of the base body.

6. Cemented carbide substrate with a wave-shaped interface according to claim 1, characterized in that The ring-shaped reinforcing band is integrally formed with the base body.

7. Cemented carbide substrate with a wave-shaped interface according to claim 1, characterized in that The first groove and the second groove are both arc-shaped grooves.

8. Cemented carbide substrate with a wave-shaped interface according to claim 7, characterized in that The curvature radius of the bottom of the first groove and the second groove is both 3mm, and the recess radius of the first groove and the second groove is both 1-4mm.

9. Cemented carbide substrate with a wave-shaped interface according to claim 1, characterized in that, The connecting groove is provided with one or more pairs, and each pair of connecting grooves is symmetrically distributed.

10. A polycrystalline diamond compact characterized by, The utility model relates to a hard alloy substrate with wavy interface, comprising: a diamond layer and a base body with wavy interface according to any one of claims 1-9; wherein one side of the diamond layer is provided with a complementary structure, and the diamond layer is arranged on the top end face of the base body through the complementary structure and is attached to the wave crest, the wave trough, the ring-shaped reinforcing band and the connecting groove.

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