CN214741117U - Polycrystalline diamond compact, PDC bearing assembly and cutting tool - Google Patents
Polycrystalline diamond compact, PDC bearing assembly and cutting tool Download PDFInfo
- Publication number
- CN214741117U CN214741117U CN202120456405.1U CN202120456405U CN214741117U CN 214741117 U CN214741117 U CN 214741117U CN 202120456405 U CN202120456405 U CN 202120456405U CN 214741117 U CN214741117 U CN 214741117U
- Authority
- CN
- China
- Prior art keywords
- layer
- polycrystalline diamond
- diamond compact
- alloy
- support ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model provides a polycrystalline diamond compact, a PDC bearing assembly and a cutting tool, wherein the polycrystalline diamond compact comprises an alloy matrix layer and a diamond layer, and the diamond layer is combined with the alloy matrix layer through high-temperature sintering; the polycrystalline diamond compact also comprises an alloy steel layer; the diamond layer, the alloy matrix layer and the alloy steel layer are sequentially arranged along the first direction, and the alloy matrix layer and the alloy steel layer are mutually combined through diffusion welding. The PDC bearing set includes a polycrystalline diamond compact. The cutting tool includes a polycrystalline diamond compact. The alloy matrix layer and the alloy steel layer are welded and combined through diffusion welding, the shear strength of the welding seam of the two material layers is effectively improved, and the overall strength of the polycrystalline diamond composite sheet with the three-layer structure is improved. In addition, secondary welding is not needed, the production efficiency is improved, and the diamond layer is prevented from being damaged by secondary high temperature.
Description
Technical Field
The utility model relates to a superhard composite material technical field, concretely relates to polycrystalline diamond compact, PDC bearing subassembly and cutting tool.
Background
The diamond composite sheet is formed by sintering diamond micro powder and a hard alloy matrix (alloy matrix layer) together at high temperature and high pressure, and the diamond micro powder is sintered into a polycrystalline diamond layer, so that the composite sheet has ultrahigh hardness and wear resistance of diamond. The diamond compacts may be used in a variety of different operating environments, such as diamond compacts that may be used on PDC bits and PDC bearings.
Taking a PDC bearing as an example, the diamond compact needs to be mounted and welded to a support ring of the PDC bearing. The mounting position is arranged on the support ring, and after the diamond composite sheet is arranged at the mounting position, the hard alloy matrix and the support ring are welded together in a brazing mode by adding welding flux because the support ring is made of steel.
The other existing diamond composite sheet is characterized in that in order to improve the installation capacity of the diamond composite sheet, the diamond composite sheet further comprises a connecting layer connected with the alloy matrix layer, the connecting layer is made of steel, the physical property of the connecting layer is close to that of the support ring, and the connecting layer is combined with the alloy matrix layer in a brazing mode through secondary welding. After the diamond compact is arranged at the installation position, the connecting layer and the support ring can be welded together in a fusion welding mode.
The existing polycrystalline diamond compact has the problems that if the hard alloy matrix and the support ring are welded by brazing, the weld joint between the hard alloy matrix and the support ring has low strength and poor impact resistance; if the polycrystalline diamond compact is provided with the connecting layer, the shearing strength is low due to brazing welding between the connecting layer and the hard alloy substrate, and the fracture phenomenon is easy to occur at the welding seam between the connecting layer and the hard alloy substrate. In addition, when the secondary high-temperature welding of the joining layer and the cemented carbide base body is performed, there is a possibility that the diamond layer is damaged, and the production efficiency is lowered.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide an improve installation strength, improve shear strength and improve production efficiency's polycrystalline diamond compact.
A second object of the present invention is to provide a PDC bearing assembly having the above polycrystalline diamond compact and improved strength.
A third object of the present invention is to provide a cutting tool having the above polycrystalline diamond compact and improved strength.
The utility model discloses polycrystalline diamond compact that first purpose provided includes alloy matrix layer and diamond layer, the diamond layer combines with alloy matrix layer through high temperature sintering; the polycrystalline diamond compact also comprises an alloy steel layer; the diamond layer, the alloy matrix layer and the alloy steel layer are sequentially arranged along the first direction, and the alloy matrix layer and the alloy steel layer are mutually combined through diffusion welding.
According to the scheme, in the press, under the conditions of high temperature and high pressure, the sintering of the diamond powder on the alloy base layer and the diffusion welding of the alloy base layer and the alloy steel layer can be completed in the same time period. The alloy substrate layer and the alloy steel layer are welded and combined through diffusion welding, metal atoms are diffused mutually, the bonding force between the two material layers is greatly improved, the shear strength of the welding seam of the two material layers is effectively improved, and therefore the overall strength of the polycrystalline diamond composite sheet with the three-layer structure is guaranteed. In addition, secondary welding is not needed, the production efficiency is improved, and the diamond layer cannot be damaged due to secondary high temperature.
The alloy steel layer comprises a base part and a connecting structure, wherein the base part is connected with the alloy base layer, and the connecting structure extends from the base part to the alloy base layer; in projection in the first direction, the projection area of the connecting structure is smaller than that of the base.
In a further aspect, the connecting structure is a cartridge post.
Still further, the connection structure is a threaded post.
From the above, the alloy steel layer is cut to form a connection structure, which may be a plug-in post, a threaded post or other structure suitable for snap-fit installation. Taking the insertion column as an example, the support ring is provided with a step through hole, after the polycrystalline diamond compact is arranged in the step through hole, the insertion column penetrates out from the hole section with the smaller inner diameter, the base part and the alloy matrix layer are positioned in the hole section with the larger inner diameter, then, fusion welding is carried out between the insertion column and the support ring at the side where the insertion column penetrates out, and brazing is carried out between the alloy matrix layer and the support ring at the side where the alloy matrix layer is positioned. The relative both sides of polycrystalline diamond compact all obtain effective welding with the support ring, and wherein one side combines with the fusion welding mode, and this setting can effectively improve the joint strength between polycrystalline diamond compact and the support ring, further reduces the possibility of fracture or even droing.
The further proposal is that the raw material of the alloy steel layer is 40Cr alloy steel.
Therefore, the alloy steel layer needs to be subjected to fusion welding with the support ring, and the welding strength of the alloy steel layer and the support ring can be improved by the arrangement.
The utility model provides a PDC bearing assembly that the second purpose includes the support ring and fixes the polycrystalline diamond compact on the support ring; the polycrystalline diamond compact is the polycrystalline diamond compact; the support ring is provided with a mounting through hole, the mounting through hole comprises a first hole section and a second hole section which are sequentially arranged along the penetrating direction of the mounting through hole, the inner contour of the first hole section is matched with the outer contour of the base body, and the inner contour of the second hole section is matched with the outer contour of the connecting structure; the connecting structure is located in the second bore section, and the base and the alloy matrix layer are located in the first bore section.
Further, the mounting through hole penetrates between the first side and the second side of the support ring; on the first side, the connection structure is welded to the support ring.
In a further aspect, the alloy substrate layer is brazed to the support ring on the second side.
According to the scheme, firstly, the alloy matrix layer and the alloy steel layer are welded by diffusion welding, so that the strength of the polycrystalline diamond composite sheet is improved; under this prerequisite, polycrystalline diamond compact's relative both sides all obtain effective welding with the support ring, and wherein one side combines with the fusion welding mode, and this setting can effectively improve the joint strength between polycrystalline diamond compact and the support ring, further reduces the possibility that splits and even drops.
The further proposal is that a first chamfer is arranged at the periphery of the mounting through hole on the first side; the extending tail end of the connecting structure is provided with a second chamfer; and a welding groove is formed between the first chamfer and the second chamfer.
Therefore, the arrangement of the fusion welding groove can improve the welding quality between the connecting structure and the support ring.
The utility model discloses the cutting tool that the third purpose provided includes polycrystalline diamond compact, and polycrystalline diamond compact adopts foretell polycrystalline diamond compact.
Drawings
Fig. 1 is a schematic view of the polycrystalline diamond compact according to the first embodiment of the present invention before cutting.
Fig. 2 is a schematic diagram of the polycrystalline diamond compact according to the first embodiment of the present invention after cutting.
Fig. 3 is a partial schematic view of a support ring according to a first embodiment of the PDC bearing assembly of the present invention.
Fig. 4 is a schematic view of a first embodiment of the PDC bearing assembly of the present invention.
Fig. 5 is a partial schematic view of a first embodiment of a PDC bearing assembly according to the present invention before welding.
Fig. 6 is a partial schematic view of the PDC bearing assembly of the present invention after welding.
Fig. 7 is a schematic view of a second embodiment of the polycrystalline diamond compact of the present invention.
Fig. 8 is a schematic view of a third embodiment of the polycrystalline diamond compact of the present invention.
Fig. 9 is an exploded view of a second embodiment of the PDC bearing assembly of the present invention.
Fig. 10 is an exploded view of a third embodiment of the PDC bearing assembly of the present invention.
Detailed Description
First embodiment of polycrystalline diamond compact
Referring to fig. 1, a polycrystalline diamond compact 100 synthesized in a press without cutting has an overall cylindrical shape, and the polycrystalline diamond compact 100 includes a diamond layer 1, an alloy substrate layer 2, and an alloy steel layer 3 sequentially combined in a first direction (indicated by an arrow). The diamond layer 1 is formed by sintering diamond powder raw materials on an alloy base layer 2 at high temperature and high pressure, the alloy base layer 2 is made of tungsten carbide, the alloy steel layer 3 is made of 40CrMoV alloy steel, and the alloy base layer 2 and the alloy steel layer 3 are welded in a diffusion welding mode.
Referring to fig. 2, after the alloy steel layer 3 of the polycrystalline diamond compact 100 is cut, the alloy steel layer 3 forms a base portion 31 and a connection structure 32, an outer diameter of the base portion 31 is consistent with an outer diameter of the alloy matrix layer 2, the connection structure 32 is an insertion column protruding from the base portion 31 in a first direction away from the alloy matrix layer 2, the outer diameter of the connection structure 32 is smaller than the outer diameter of the base portion 31, and an extension end of the connection structure 32 is provided with a second chamfer 321.
Referring to fig. 1 and 2, when the polycrystalline diamond compact 100 is manufactured, powder raw materials of the diamond layer 1, the alloy substrate layer 2, and the alloy steel layer 3 are all placed in a press and synthesized under a high-temperature and high-pressure condition, sintering of the diamond layer 1 is completed in the synthesis process, and diffusion welding of the alloy substrate layer 2 and the alloy steel layer 3 is completed at the same time.
In the manufacturing method, firstly, a prepressing step is carried out, diamond powder raw materials are placed in a metal round cup, and the diamond powder raw materials in the metal round cup are prepressed through a pressing block, wherein the prepressing frequency is more than or equal to 1, preferably, the prepressing frequency is 2, and the prepressing pressure is 0.1 MPa-1 MPa. And forming a working layer preformed body by the diamond powder raw material after the pre-pressing is finished.
And then, performing a high-temperature high-pressure step, namely putting the cobalt sheet, the hard alloy matrix (alloy matrix layer) and the alloy steel cylinder (alloy steel layer) which are used as adhesives into a metal round cup with a working layer preformed body, and sequentially abutting the working layer preformed body, the cobalt sheet, the hard alloy matrix and the alloy steel cylinder. And then placing the metal round cup with the working layer preformed body, the cobalt sheet, the hard alloy matrix and the alloy steel cylinder into a press for high-temperature high-pressure synthesis.
In the high-temperature high-pressure step, the synthesis pressure is more than 5 MPa, and the synthesis temperature is more than 1000 ℃. Since the first pressure condition of diffusion welding between the cemented carbide substrate (the alloy substrate layer) and the alloy steel cylinder (the alloy steel layer) is higher than the second pressure condition of sintering of the diamond powder, and the diffusion welding between the cemented carbide substrate and the alloy steel cylinder and the sintering of the diamond powder are performed at the same time period, the higher first pressure condition, that is, the synthetic pressure of 5 mpa or more, is used as the set pressure in the press. In addition, the first temperature condition of diffusion welding of the hard alloy substrate (alloy substrate layer) and the alloy steel cylinder and the second temperature condition of sintering of the diamond powder are combined to preset proper set temperature for the process, so that the diamond layer 1, the alloy substrate layer 2 and the alloy steel layer 3 are integrated in one process.
Then, a cutting process step is performed to cut the alloy steel layer 3 to form the base 31, the connection structure 32, and the second chamfer 321 on the extended end portion of the connection structure 32 on the alloy steel layer 3. The manufacturing method can improve the production efficiency of the polycrystalline diamond compact, can also avoid the damage of secondary high temperature to the diamond layer 1, and simultaneously ensures the welding strength between the alloy substrate layer 2 and the alloy steel layer 3 and the shear strength at the welding seam, and the shear strength of the welding seam between the alloy substrate layer 2 and the alloy steel layer 3 is over 170 MPa through a shear strength test.
Referring to fig. 3 to 4 again, the PDC bearing assembly of this embodiment is an assembly in a PDC thrust bearing, and includes a support ring 4 and a polycrystalline diamond compact 100, where the support ring 4 is provided with a plurality of mounting through holes 400 that are uniformly arranged along its circumferential direction and axially penetrate through the support ring 4 between the first side 41 and the second side 42 opposite to each other, the mounting through holes 400 are stepped holes, the mounting through holes 400 include a first hole segment 401 and a second hole segment 402 that are sequentially connected along the axial direction, and an outer diameter of the first hole segment 401 is greater than an outer diameter of the second hole segment 402. In addition, at the first side 41, a first chamfer 403 is provided at the periphery of the mounting through hole 400.
Referring to fig. 2, 3, and 5, after polycrystalline diamond compact 100 is installed in mounting through-hole 400, base 31 and alloy matrix layer 2 are located in first bore section 401, an inner profile of first bore section 401 matches an outer profile of base 31 and alloy matrix layer 2, connection structure 32 is located in second bore section 402, and an inner profile of second bore section 402 matches an outer profile of connection structure 32. The first chamfer 403 and the second chamfer 321 form a fusion welding recess 404 therebetween.
Referring again to fig. 6, at the first side 41, a fusion weld is made between the outer periphery of the extended end of the connection structure 32 and the outlet edge of the second bore section 402 in the support ring 4. The weld is located at the fusion welding groove 404, the molten material 309 of the connecting structure 32 and the support ring 4 is fused at the fusion welding groove 404 and combined after cooling, and the arrangement of the fusion welding groove 404 can avoid the fusion welding process from influencing the outer contour of the PDC bearing assembly. On the second side 42, the outer circumferential surface of the alloy matrix layer 2 is soldered to the inlet edge of the first hole section 401 on the support ring 4 by brazing, and the solder 209 bonds the alloy matrix layer 2 to the support ring 4.
Firstly, the alloy matrix layer 2 and the alloy steel layer 3 are welded by diffusion welding, and the strength of the polycrystalline diamond compact 1 is improved; under this prerequisite, the relative both sides that have add polycrystalline diamond compact 1 of alloy steel layer 3 all obtain effective welding with support ring 4, and wherein one side combines with the fusion welding mode, and this setting can effectively improve the joint strength between polycrystalline diamond compact 1 and the support ring 4, reduces the possibility that the fracture even drops.
Polycrystalline diamond compact second embodiment
Referring to fig. 7, in the alloy steel layer 513 of the polycrystalline diamond compact 51, the connection structure 514 is a threaded column, and an external thread 515 is disposed on the outer periphery of the connection structure 514 in the present embodiment. Correspondingly, in the PDC bearing assembly, an internal thread matched with the external thread 515 is provided on an inner wall surface of the second hole segment having a smaller inner diameter in the mounting through hole of the support ring matched with the polycrystalline diamond compact 51. When the connecting structure 514 is located the second hole section, the external thread 515 is matched with the internal thread of the inner wall surface of the second hole section, so that the assembling strength of the polycrystalline diamond compact 51 and the support ring can be improved.
In addition, further, after the polycrystalline diamond compact 51 is mounted on the support ring, fusion welding is performed between the extended tail end of the threaded column and the outlet edge of the second hole section on the support ring; still further, brazing is carried out between the alloy matrix layer and the support ring.
Third embodiment of polycrystalline diamond compact
Referring to fig. 8, in the present embodiment, the alloy steel layer 523 of the polycrystalline diamond compact 52 includes two connecting structures 524, and the connecting structures 524 are plug-in posts. Correspondingly, the mounting through-hole provided on the support ring comprises a first hole section and two second hole sections. Two second hole sections all communicate with first hole section in the direction of running through, and two second hole sections are adjacent setting in the direction of perpendicular to direction of running through.
In other embodiments, the connecting structure may be other protruding structures than a cylinder, such as a protruding structure of a cubic cylinder.
In other embodiments, the number of connecting structures is three or more.
Second embodiment of PDC bearing Assembly
Referring to fig. 9, the utility model provides a PDC bearing assembly can also regard as PDC journal bearing's subassembly, and support ring 81 is PDC journal bearing's outer support ring, is provided with on the support ring 81 along its radial installation through-hole 810 that link up, and polycrystalline diamond compact 71 welds with fusion welding's mode between the outer peripheral face of polycrystalline diamond compact 71 and support ring 81 from the interior cartridge of circumference of support ring 81 to installation through-hole 810. In addition, the surface 710 of the diamond layer of the polycrystalline diamond compact 71 mounted on the outer support ring is configured as a concave arc.
Second embodiment of PDC bearing Assembly
Referring to fig. 10, the utility model provides a PDC bearing subassembly can also regard as PDC journal bearing's subassembly, and support ring 82 is PDC journal bearing's inner support ring, is provided with on the support ring 82 along its radial installation through-hole 820 that link up, and polycrystalline diamond compact 72 welds with fusion welding's mode between the outer peripheral face of polycrystalline diamond compact 72 and support ring 82 in installation through-hole 820 is followed to the periphery cartridge of support ring 82. Additionally, the surface 720 of the diamond layer of the polycrystalline diamond compact 72 mounted on the inner support ring is configured as an outwardly convex arcuate surface.
Additionally, the utility model provides a polycrystalline diamond compact can also use on the cutting tool like the drill bit, the utility model discloses still the request protection contains the utility model discloses a polycrystalline diamond compact's grinding cutter. Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the invention are possible to those skilled in the art, without departing from the spirit and scope of the invention.
Claims (10)
1. The polycrystalline diamond compact comprises an alloy matrix layer and a diamond layer, wherein the diamond layer is combined with the alloy matrix layer through high-temperature sintering;
the method is characterized in that:
the polycrystalline diamond compact further comprises an alloy steel layer;
the diamond layer, the alloy matrix layer and the alloy steel layer are sequentially arranged along a first direction, and the alloy matrix layer and the alloy steel layer are mutually combined through diffusion welding.
2. The polycrystalline diamond compact of claim 1, wherein:
the alloy steel layer comprises a base part and a connecting structure, the base part is connected with the alloy base layer, and the connecting structure extends from the base part to the opposite direction of the alloy base layer;
the projection area of the connecting structure is smaller than that of the base part on the projection of the first direction.
3. A polycrystalline diamond compact according to claim 2, wherein:
the connecting structure is a plug-in mounting column.
4. A polycrystalline diamond compact according to claim 2, wherein:
the connecting structure is a threaded column.
5. A polycrystalline diamond compact according to any one of claims 1 to 4, wherein:
the raw material of the alloy steel layer is 40Cr alloy steel.
The PDC bearing assembly comprises a support ring and a polycrystalline diamond compact fixed on the support ring;
the method is characterized in that:
the polycrystalline diamond compact is the polycrystalline diamond compact of any one of claims 2 to 4;
the support ring is provided with a mounting through hole, the mounting through hole comprises a first hole section and a second hole section which are sequentially arranged along the penetrating direction of the mounting through hole, the inner contour of the first hole section is matched with the outer contour of the base body, and the inner contour of the second hole section is matched with the outer contour of the connecting structure;
the connection structure is located in the second bore section, and the base and the alloy base layer are located in the first bore section.
7. The PDC bearing assembly of claim 6, wherein:
the mounting through hole penetrates between the first side and the second side of the support ring;
on the first side, the connection structure is welded to the support ring by fusion welding.
8. The PDC bearing assembly of claim 7, wherein:
arranging a first chamfer at the periphery of the mounting through hole on the first side;
the extending tail end of the connecting structure is provided with a second chamfer;
and a welding groove is formed between the first chamfer and the second chamfer.
9. The PDC bearing assembly of claim 7 or 8, wherein:
at the second side, the alloy base layer is brazed to the support ring.
10. Cutting tool, including polycrystalline diamond compact, its characterized in that:
the polycrystalline diamond compact is the polycrystalline diamond compact of any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120456405.1U CN214741117U (en) | 2021-03-02 | 2021-03-02 | Polycrystalline diamond compact, PDC bearing assembly and cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120456405.1U CN214741117U (en) | 2021-03-02 | 2021-03-02 | Polycrystalline diamond compact, PDC bearing assembly and cutting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214741117U true CN214741117U (en) | 2021-11-16 |
Family
ID=78591648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120456405.1U Active CN214741117U (en) | 2021-03-02 | 2021-03-02 | Polycrystalline diamond compact, PDC bearing assembly and cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214741117U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855033A (en) * | 2021-03-02 | 2021-05-28 | 广东钜鑫新材料科技股份有限公司 | Polycrystalline diamond compact, manufacturing method thereof, PDC bearing assembly and cutting tool |
| CN114508307A (en) * | 2022-02-15 | 2022-05-17 | 中国石油大学(华东) | Bionic high-impact-resistance polycrystalline diamond compact |
| CN116677712A (en) * | 2023-08-02 | 2023-09-01 | 吉林大学 | Shell stripe-like surface texture cobalt-removing diamond thrust bearing |
-
2021
- 2021-03-02 CN CN202120456405.1U patent/CN214741117U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855033A (en) * | 2021-03-02 | 2021-05-28 | 广东钜鑫新材料科技股份有限公司 | Polycrystalline diamond compact, manufacturing method thereof, PDC bearing assembly and cutting tool |
| CN114508307A (en) * | 2022-02-15 | 2022-05-17 | 中国石油大学(华东) | Bionic high-impact-resistance polycrystalline diamond compact |
| CN116677712A (en) * | 2023-08-02 | 2023-09-01 | 吉林大学 | Shell stripe-like surface texture cobalt-removing diamond thrust bearing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214741117U (en) | Polycrystalline diamond compact, PDC bearing assembly and cutting tool | |
| US6658968B2 (en) | Percussive rock drill bit and buttons therefor and method for manufacturing drill bit | |
| EP2609290B1 (en) | Bonding of a super-hard wear part to a tool component | |
| EP0718462A2 (en) | Drill bit cutting element and method for mounting a cutting element on a drill bit | |
| US5273379A (en) | Blank material for drill and drill therefrom | |
| US4109737A (en) | Rotary drill bit | |
| CN100415434C (en) | Machine tool with a tool shank and a cutting head | |
| US20090078470A1 (en) | System, method, and apparatus for reactive foil brazing of cutter components for fixed cutter bit | |
| GB2438073A (en) | Thermally stable ultra-hard material compact construction | |
| CN1011808B (en) | Pocketed stud for polycrystalline diamond cutting blanks | |
| US4595067A (en) | Rotary drill bit, parts therefor, and method of manufacturing thereof | |
| EP1182325A1 (en) | Cutting elements for rotary drill bits | |
| US8684111B2 (en) | Core drill bit | |
| KR20090086965A (en) | Superhard tip and process for producing the same | |
| CN101537559B (en) | Manufacturing method for diamond tool | |
| KR20210094524A (en) | Disc cutter for tunnel boring machine and manufacturing method thereof | |
| CN112855033A (en) | Polycrystalline diamond compact, manufacturing method thereof, PDC bearing assembly and cutting tool | |
| US20020000336A1 (en) | Method for the manufacturing of a cone cutter for rotary drilling by crushing, a rotary cone drill bit, a cone cutter and crushing elements therefor | |
| CN210147381U (en) | PCD and hard alloy composite drill bit | |
| CN112930429B (en) | Disk cutter for undercut apparatus and method of manufacturing the same | |
| US5101691A (en) | Methods of manufacturing cutter assemblies for rotary drill bits | |
| US10087685B1 (en) | Shear-resistant joint between a superabrasive body and a substrate | |
| JPH0346268B2 (en) | ||
| CN111852344B (en) | Polycrystalline diamond compact and preparation method thereof | |
| CN214161531U (en) | Milling cutter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |