CN218882156U - Hard alloy matrix and polycrystalline diamond hard alloy composite sheet - Google Patents
Hard alloy matrix and polycrystalline diamond hard alloy composite sheet Download PDFInfo
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- CN218882156U CN218882156U CN202223479835.9U CN202223479835U CN218882156U CN 218882156 U CN218882156 U CN 218882156U CN 202223479835 U CN202223479835 U CN 202223479835U CN 218882156 U CN218882156 U CN 218882156U
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- hard alloy
- polycrystalline diamond
- groove
- composite sheet
- face
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- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 39
- 239000010432 diamond Substances 0.000 title claims abstract description 39
- 239000000956 alloy Substances 0.000 title claims abstract description 23
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 23
- 239000011159 matrix material Substances 0.000 title claims description 5
- 239000002131 composite material Substances 0.000 title abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000005553 drilling Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000010329 laser etching Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
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Abstract
The utility model discloses a hard alloy substrate and a polycrystalline diamond hard alloy composite sheet, wherein the end surface of the hard alloy substrate is provided with a groove which is approximately a regular polygon and is concentric with the end surface, a plurality of corners of the regular polygon respectively extend beyond the edge of the end surface, and the end surface is divided into a plurality of crescent-shaped bulges; the polycrystalline diamond layer is sintered and embedded into the hard alloy substrate corresponding to the groove to form high bonding force of a three-dimensional bonding surface between the polycrystalline diamond layer and the hard alloy substrate, so that the high impact resistance of the structural composite sheet is realized; the cutting edge formed at the edge can maintain a sharp cutting edge for a long time, realizing high cutting efficiency.
Description
Technical Field
The utility model relates to a drilling equipment technical field specifically is a carbide base member and polycrystalline diamond carbide compact piece.
Background
The polycrystalline diamond compact PDC has high wear resistance of diamond and high toughness of hard alloy, and is widely applied to the fields of petroleum and natural gas drilling, mining, engineering construction and the like. The existing widely used flat structure diamond compact is generally cylindrical. The contact and action area of the composite sheet with the rock at the initial drilling and excavating stage is small, the drilling speed of the drill bit is high, the contact area of the composite sheet with the rock is remarkably increased along with the abrasion of the arc-shaped edge of the diamond layer into a plane, the phenomenon that the drill bit is drilled to be dull is shown, and the drilling speed and the drilling efficiency are reduced. Meanwhile, the impact resistance of the composite sheet is difficult to improve due to the natural physical property difference of the diamond and the hard alloy.
At present, the important way for improving the shock resistance of the diamond compact is to increase the contact area of the bonding interface of the diamond layer and the hard alloy layer so as to strengthen the bonding force and optimize the physical properties of materials near the bonding interface so as to enhance the matching. Research aiming at the improvement of the cutting efficiency mainly focuses on the development and optimization of various special-shaped structure composite sheets, and the composite sheets with the plane structure are generally processed into structures with edges, sharp corners and the like by methods such as machining, electric spark cutting or laser etching and the like. But the processing efficiency is low and the cost is high.
Therefore, there is a need for a cemented carbide substrate that can be combined with polycrystalline diamond to form a composite sheet with high cutting efficiency and high impact resistance, and that is an important way to improve the cutting efficiency of diamond bits and reduce the mining cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hard alloy base member and polycrystalline diamond hard alloy composite sheet overcomes defects such as prior art shock resistance is poor, cutting efficiency is low.
In order to achieve the above purpose, the scheme of the utility model is as follows:
a hard alloy substrate is characterized in that a groove which is approximately polygonal is arranged on the end face and is concentric with the end face, and a plurality of corners of the polygon respectively extend to the outside of the edge of the end face to divide the end face into a plurality of crescent protrusions with the same area.
Further, the groove is approximately rhombic, and two acute angles extend out of the edge of the end face.
Furthermore, the side surface and the bottom surface of the groove are respectively one or a combination of a plurality of planes, cambered surfaces, curved surfaces and bulges.
A polycrystalline diamond hard alloy compact comprises the hard alloy substrate and polycrystalline diamond, wherein the polycrystalline diamond is matched with the grooves and is fixed in the grooves.
Furthermore, the bottom of the polycrystalline diamond and the bottom of the groove are respectively provided with a matched chamfer.
Compared with the prior art, the utility model discloses possess following beneficial effect:
the hard alloy matrix provided by the utility model can be combined with polycrystalline diamond to form high bonding force of a three-dimensional bonding surface when in use, so that the high impact resistance of the structural composite sheet is realized; cutting edges can be formed between the bulges, sharp cutting edges are kept, and high cutting efficiency is realized.
Drawings
Fig. 1 is a perspective view of the cemented carbide substrate of the present invention.
Fig. 2 is a perspective view of the polycrystalline diamond hard alloy compact of the present invention.
Wherein: 1. a cemented carbide substrate; 2. polycrystalline diamond; 11. a groove; 12. and (4) protruding.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It is to be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular manner of operation, and are not to be construed as limiting the invention.
It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The above terms may have the specific meanings given in the present invention to those skilled in the art according to the specific circumstances.
In a first embodiment, as shown in fig. 1, a cemented carbide substrate 1 is provided, which is a cylinder, and the upper end surface is provided with a groove 11 with an approximate diamond shape, which is concentric with the end surface, and two acute angles of the groove 11 respectively extend out of the edge of the end surface, i.e. the length of the longer diagonal line of the diamond shape is larger than the diameter of the end surface. The groove 11 divides the end face into two crescent-shaped protrusions 12.
In a second embodiment, as shown in fig. 2, a polycrystalline diamond cemented carbide compact is provided, which comprises the cemented carbide substrate 1 according to the first embodiment, and polycrystalline diamond 2 matched with and fixed in the grooves 11. The polycrystalline diamond 2 and the hard alloy matrix 1 form a high bonding force of a three-dimensional bonding surface, and the high impact resistance of the composite sheet with the structure is realized. The edge of the end face is positioned between the bulges 12 to form a cutting edge, so that the sharp cutting edge is kept, and high cutting efficiency is realized.
In the above embodiment, the side surface and the bottom surface of the groove 11 are respectively one or a combination of a plurality of planes, arc surfaces, curved surfaces and protrusions, and the bonding area can be increased when the polycrystalline diamond 2 is bonded to the groove 11, so as to further improve the bonding force. And the bottom of the polycrystalline diamond 2 and the bottom of the groove 11 are respectively provided with a matched chamfer, so that the polycrystalline diamond and the groove are convenient to weld and fix.
During the cutting work of the composite sheet, because the abrasive resistance of the hard alloy substrate 1 is far lower than the polycrystalline diamond 2, the hard alloy near the cutting part is preferentially worn, the cutting edge of the polycrystalline diamond material with the diamond acute angle structure is exposed in time, and the cutting edge with the structure can still keep the sharpness characteristic when the composite sheet has large abrasion loss, so that the continuous high cutting efficiency is realized.
In other embodiments, the approximately diamond-shaped grooves 11 may be designed as an approximately regular polygon enclosed by straight lines and/or curved lines, such as a regular triangle, a square, a regular pentagon, a regular hexagon, or the like. By "approximately" it is meant that the end profile has the basic characteristics of a regular polygon, each angle being of equal size, and the profile of each side can be at least one arc, a plurality of straight lines, and combinations thereof, from a top view. The center of the circumscribed circle of the regular polygon coincides with the center of the end face, so that the end face is divided into at least more than two protrusions 12 with the same area, at least more than two cutting edges are formed, and the center points of the end face are uniformly distributed. The multi-group cutting edges can realize repeated use of the composite sheet by one-time transposition, so that the cutting efficiency is improved, and the use cost of the composite sheet is effectively reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The hard alloy matrix is characterized in that a groove (11) which is approximately polygonal is arranged on the end face and is concentric with the end face, and a plurality of corners of the polygon respectively extend to the outside of the edge of the end face to divide the end face into a plurality of crescent-shaped protrusions (12) with the same area.
2. Cemented carbide body according to claim 1, characterized in that the grooves (11) are approximately diamond shaped, with two acute angles extending beyond the edge of the end face.
3. The cemented carbide substrate according to claim 1, characterized in that the side and bottom surfaces of the groove (11) are one or more combinations of plane, arc, curved and convex, respectively.
4. A polycrystalline diamond cemented carbide compact comprising a cemented carbide substrate according to any one of claims 1 to 3 and polycrystalline diamond (2), the polycrystalline diamond (2) being fitted into the grooves (11) and fixed therein.
5. A compact according to claim 4, characterised in that the polycrystalline diamond (2) and the groove (11) are provided with matching chamfers at their bottoms, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223479835.9U CN218882156U (en) | 2022-12-26 | 2022-12-26 | Hard alloy matrix and polycrystalline diamond hard alloy composite sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223479835.9U CN218882156U (en) | 2022-12-26 | 2022-12-26 | Hard alloy matrix and polycrystalline diamond hard alloy composite sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218882156U true CN218882156U (en) | 2023-04-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223479835.9U Active CN218882156U (en) | 2022-12-26 | 2022-12-26 | Hard alloy matrix and polycrystalline diamond hard alloy composite sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218882156U (en) |
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2022
- 2022-12-26 CN CN202223479835.9U patent/CN218882156U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A hard alloy matrix and polycrystalline diamond hard alloy composite sheet Effective date of registration: 20231115 Granted publication date: 20230418 Pledgee: Guanggu Branch of Wuhan Rural Commercial Bank Co.,Ltd. Pledgor: WUHAN NINESTONES SUPERABRASIVES Co.,Ltd. Registration number: Y2023980065653 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |