CN201273145Y - Diamond composite sheet - Google Patents
Diamond composite sheet Download PDFInfo
- Publication number
- CN201273145Y CN201273145Y CNU200820148892XU CN200820148892U CN201273145Y CN 201273145 Y CN201273145 Y CN 201273145Y CN U200820148892X U CNU200820148892X U CN U200820148892XU CN 200820148892 U CN200820148892 U CN 200820148892U CN 201273145 Y CN201273145 Y CN 201273145Y
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- CN
- China
- Prior art keywords
- hard alloy
- diamond
- diamond layer
- compact
- salient
- 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.)
- Expired - Fee Related
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Abstract
A diamond compact belongs to the technical field of diamond compact manufacturing for the drilling exploration, which comprises a hard alloy basal body and a diamond layer which is sintered on the hard alloy basal body. A salient which uses the circle center as the starting point to extend outwards in a shape of the Archimedes spiral line is arranged on the faying face of the hard alloy basal body and the diamond layer. The salient on a lug boss is designed into a shape of the Archimedes spiral line, and the diamonds embedded between steps have the same width forever as the distance between each salient of the spiral line and the step is equal forever. Therefore, the cohesion of the diamond layer and the hard alloy is highly even, the diamond compact can not be damaged by the concentrated stress on the embedded diamond layer when being used under high pressure or cutting force, the carrying capacity of the compact does not have directional differences, and the impact resistance and the wearing resistance of drill teeth are effectively increased.
Description
Technical field
The utility model belongs to probing with diamond compact manufacturing technology field, is specifically related to a kind of diamond compact that is used for oil, geology bit cutting tooth.
Background technology
Diamond compact is the polycrystalline diamond product by the fine grained diamond band cemented carbide substrate that sintering forms under high-temperature and high-pressure conditions.This product has high rigidity, high-wearing feature and good impact and weldability, has been widely used as the cutting teeth of oil, geology drill bit.Since cutting teeth when cutting especially the time as bit cutting tooth broken rock, can be subjected to intense impact, Chang Yi causes all or part of diamond to come off from alloy substrate, thereby has a strong impact on the functional performance and the life-span of smear metal tooth.For improving adamantine combined strength bination, having had in the prior art is arranged to the hard alloy substrate bonding surface step-like, or on boss, be provided with projection, patent CN2726791Y discloses a kind of diamond compact, comprise hard alloy substrate and diamond layer, the bonding surface of hard alloy substrate and diamond layer is provided with the boss coaxial with its consubstantiality, and boss is provided with equally distributed projection, projection be shaped as sphere or taper.Also there is the people that projection is made concentric circles at present, though this can make the shock resistance of diamond compact be improved, but because the difference of diamond and carbide alloy coefficient of thermal expansion, it is can be because of suffered stress concentrated and impaired or come off to inlay the diamond layer of part.
The utility model content
The purpose of this utility model is to improve the structure of existing diamond compact hard alloy substrate and diamond layer bonding surface, provides a kind of shock resistance and abrasion resistance high diamond compact.
The purpose of this utility model is achieved through the following technical solutions:
A kind of diamond compact comprises hard alloy substrate and through sintered combined diamond layer on hard alloy substrate, is provided with the boss coaxial with its consubstantiality that the periphery is a step.Wherein to be provided with the center of circle be starting point to the bonding surface of hard alloy substrate and diamond layer, the projection of extending to cylindrical with the shape of spiral of Archimedes.
The cross section of described projection is circular arc, polygon or their combination.
Projection and proximal surface are by the circular arc smooth connection.
The utility model is set as the shape of spiral of Archimedes with the projection on the boss, because the distance between every raised step of this helical equates forever, it is identical forever to be embedded between the step diamond layer width; Be continuous band-shaped distribution owing to diamond layer again, and, directly do not link to each other between each diamond layer annulus unlike donut; Therefore, the adhesion height of diamond layer and carbide alloy is even, when under high pressure and cutting force, using, and can be unconcentrated and impaired because of the suffered stress of diamond layer of inlaying part, there is not the difference of directionality in the composite sheet supporting capacity yet, and the shock resistance and the abrasion resistance of boring tooth effectively improve.
Description of drawings
Fig. 1 is the vertical view of hard alloy substrate in the utility model.
Fig. 2 is a positive view of the present utility model.
The specific embodiment
Diamond compact of the present utility model comprises hard alloy substrate 3 and meets diamond layer 2 on hard alloy substrate 3 through sintering that sintering forms under the superhigh-pressure high-temp condition.Wherein to be provided with the center of circle be starting point to the bonding surface of hard alloy substrate 3 and diamond layer 2, the projection 1 of extending to cylindrical with the shape of spiral of Archimedes.
Example 1 described protruding 1 cross section is a quadrangle.Projection 1 is connected by arc transition with proximal surface.
The cross section of the utility model protrusions 1 also can be circular arc, polygon or their combination.
Claims (3)
1. diamond compact, comprise hard alloy substrate (3) and through sintered combined diamond layer (2) on hard alloy substrate (3), it is characterized in that: it is starting point that the bonding surface of hard alloy substrate (3) and diamond layer (2) is provided with the center of circle, the projection (1) of extending to cylindrical with the shape of spiral of Archimedes.
2. diamond compact according to claim 1 is characterized in that: the cross section of described projection (1) is circular arc, polygon or their combination.
3. diamond compact according to claim 1 and 2 is characterized in that: projection (1) and proximal surface are by the circular arc smooth connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820148892XU CN201273145Y (en) | 2008-08-29 | 2008-08-29 | Diamond composite sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820148892XU CN201273145Y (en) | 2008-08-29 | 2008-08-29 | Diamond composite sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201273145Y true CN201273145Y (en) | 2009-07-15 |
Family
ID=40883493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820148892XU Expired - Fee Related CN201273145Y (en) | 2008-08-29 | 2008-08-29 | Diamond composite sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201273145Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019897A (en) * | 2015-07-29 | 2015-11-04 | 桂林星钻超硬材料有限公司 | Long-service life polycrystalline diamond cutting tooth |
| CN109854179A (en) * | 2018-12-21 | 2019-06-07 | 太重（天津）滨海重型机械有限公司 | Stake top drilling machine drilling tool |
-
2008
- 2008-08-29 CN CNU200820148892XU patent/CN201273145Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019897A (en) * | 2015-07-29 | 2015-11-04 | 桂林星钻超硬材料有限公司 | Long-service life polycrystalline diamond cutting tooth |
| CN109854179A (en) * | 2018-12-21 | 2019-06-07 | 太重（天津）滨海重型机械有限公司 | Stake top drilling machine drilling tool |
| CN109854179B (en) * | 2018-12-21 | 2021-01-26 | 太重（天津）滨海重型机械有限公司 | Drilling tool of pile top drilling machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090715 Termination date: 20140829 |
|
| EXPY | Termination of patent right or utility model |