CN204139979U - Shock resistance diamond hard alloy complex sheet - Google Patents
Shock resistance diamond hard alloy complex sheet Download PDFInfo
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- CN204139979U CN204139979U CN201420345571.4U CN201420345571U CN204139979U CN 204139979 U CN204139979 U CN 204139979U CN 201420345571 U CN201420345571 U CN 201420345571U CN 204139979 U CN204139979 U CN 204139979U
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- hard alloy
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- alloy substrate
- complex sheet
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Abstract
The utility model discloses a kind of diamond hard alloy complex sheet of new structure.Comprise polycrystalline diamond layer and hard alloy substrate, adopt diamond dust and hard alloy substrate to be assembled together, diamond dust sintering forms polycrystalline diamond layer and forms diamond hard alloy complex sheet with hard alloy substrate under high pressure and high temperature condition; Wherein, the assembly interface of described hard alloy substrate has cylindrical boss, boss top end face has the hemispherical projections of the dress in dot matrix; Upper edge and the lower edge of described cylindrical boss are waveform hierarchic structure; Lower edge is larger than upper edge.The cylinder boss area of the boss area ratio routine at the utility model composite sheet interface increases further, and the adhesion of polycrystalline diamond and carbide alloy also strengthens thereupon.The continuous wavy shaped configuration of boss side surfaces alleviates the stress expansion that radial impact brings, and the impact resistance of composite sheet is improved.
Description
Technical field
The utility model belongs to oil drilling, engineering driving technology field, is specifically related to a kind of diamond hard alloy complex sheet of new structure.
Background technology
Diamond hard alloy complex sheet (hereinafter referred to as " composite sheet ") is sintered by diamond dust and hard alloy substrate and forms under high pressure high temperature condition, and wherein polycrystalline diamond layer is wear-resisting working lining, and hard alloy substrate plays a supportive role.Composite sheet had both had the characteristics such as adamantine high rigidity, high abrasion, there is again the characteristics such as the high strength of carbide alloy, toughness and good solderability, be used widely in fields such as oil-gas drilling, geological drilling, engineering drilling, coal minings.
Along with the development of probing production industry, the durability, drilling efficiency, operating cost etc. of probing exploitation instrument are had higher requirement.Composite sheet, as the main cutting part of probing exploitation instrument, needs to update performance indications such as improving its abrasion resistance, impact resistance, heat resistance, to meet the need of market.Wherein, the interfacial structure of diamond layer and hard alloy layer is improved is one of important method improving composite sheet impact resistance.
In early days, the combination interface between the bi-material of diamond hard alloy complex sheet is plane structure.Along with going deep into of development test, the composite sheet of planar interface structure obtains attention in the problem that edge stress is excessive, the design of a lot of patentability has been there is in interfacial structure, as designed the various geometries such as groove, projection, boss on carbide alloy bonding surface, be referred to as non-planar interface.Non-planar interface is conducive to the bonded area strengthening polycrystalline diamond layer and hard alloy layer, strengthens bond strength, improves the distribution of residual stress, and then improves the impact resistance of diamond hard alloy complex sheet.
Although non-planar interface improves the distribution of residual stress, still can run into extreme drilling condition in actual use procedure, the radial impact resistance of composite sheet is still not enough.Typical Improving Measurements designs various boss at hard alloy substrate end face, and the edge of such composite sheet diamond layer is thick, intermediate thin, to reduce the residual stress level between diamond layer and matrix.But this round platform projection still exists some worth improvements, particularly under the percussion of external force, the stress scaling problem of round platform raised brim still exists.
Utility model content
The purpose of this utility model is by the radial bonded area between increase polycrystalline diamond layer and hard alloy substrate and improves combination, thus improve radial impact resistance and the impact resistance of composite sheet entirety, make composite sheet can be applicable to more complicated severe working environment.
For achieving the above object, the concrete scheme of employing is as follows:
A kind of diamond hard alloy complex sheet, comprises polycrystalline diamond layer and hard alloy substrate, adopts diamond dust and hard alloy substrate to sinter under high pressure and high temperature condition and forms;
Wherein, the bonding surface of described hard alloy substrate has cylindrical boss, boss top end face has the projection in lattice-like;
The annular edge of described cylindrical boss is along undulate, and lower edge is larger than upper edge.
By such scheme, the projection of described boss top end face is hemispherical.
By such scheme, described annular edge is along undulate hierarchic structure.
By such scheme, the ladder of described waveform hierarchic structure is 1 ~ 3 layer.
By such scheme, the upper edge of described boss is 5-30 ° with the lower angle along connecting line and composite sheet central axial line.
By such scheme, the waveform hierarchic structure on described upper edge and lower edge adopts rounding off.
By such scheme, described described cylindrical boss upper end also has hemispherical groove.
Technique effect of the present utility model is:
The cylinder boss area of the boss area ratio routine at the utility model composite sheet interface increases further, and the adhesion of polycrystalline diamond and carbide alloy also strengthens thereupon.
The continuous wavy shaped configuration of boss side surfaces alleviates the stress expansion that radial impact brings, and the impact resistance of composite sheet is improved.
At carbide matrix body interface, equal rounding off between cylindrical boss with phase cross surface, reduce the problem of residual stress concentrations.
Accompanying drawing explanation
Fig. 1: the outline drawing of the utility model diamond hard alloy complex sheet;
Fig. 2: the utility model hard alloy substrate interfacial structure profile stereogram;
Fig. 3: the top view of the utility model hard alloy substrate;
Fig. 4: embodiment 1 hoop pressure stress distribution map;
1-polycrystalline diamond; 2-hard alloy substrate; 3-cylindrical boss; 31-boss top end face; 32-ring surface; 33-hemispherical projections.
Detailed description of the invention
In order to understand the utility model better, illustrate content of the present utility model further below in conjunction with embodiment, but content of the present utility model is not only confined to the following examples.
With reference to accompanying drawing 1,2,3, a kind of diamond hard alloy complex sheet, comprise polycrystalline diamond 1 and hard alloy substrate 2, adopt diamond dust and hard alloy substrate 2 to be assembled together, diamond dust sintering forms polycrystalline diamond layer 1 and sinters with hard alloy substrate 2 and forms diamond hard alloy complex sheet under high pressure and high temperature condition; Wherein, the bonding surface of described hard alloy substrate has cylindrical boss 3, boss top end face 31 has the projection 33 of the distribution in lattice-like; The annular edge of described cylindrical boss 3 is along undulate, and lower edge is larger than upper edge, and is ring surface 32 between lower edge and the external diameter of composite sheet.The cylinder boss area of the boss area ratio routine adopting this to construct increases further, and the adhesion of polycrystalline diamond and carbide alloy also strengthens thereupon.And the continuous wavy shaped configuration of boss side surfaces alleviates the stress expansion that radial impact brings, and makes the impact resistance of composite sheet improve.
Optimally, the projection 33 of boss top end face 31 is hemispherical.Further increase the contact area of bonding surface.
With reference to accompanying drawing 1,2,3, the upper edge of boss 3 and the lower angle along joint face and composite sheet central axial line are certain inclination angle along joint face and central axial line with lower edge on 10-30 ° of boss, and guarantee boss side surfaces waveform hierarchic structure has the space of structure.
The waveform ladder on upper edge, lower edge all adopts rounding off.Between hard alloy substrate and the combination interface of polycrystalline diamond layer, equal rounding off, successfully can reduce the problem of residual stress concentrations.
Cylindrical boss upper end simultaneously also has hemispherical groove, to increase bonded area further.
Embodiment 1
The composite sheet diameter of the present embodiment is 15.88mm, and overall height is 13.2mm.The side of combination interface boss is waveform, interface top end face has multiple hemispherical pimple.Use the residual thermal stress of finite element analysis software Abacus to diamond layer and cemented carbide structure interface to analyze, see Fig. 4.Interface of the present utility model circumferential stress (figure is left) is from-4534MPa to 1347MPa, and reference examples (figure is right) is for the circumferential stress of common boss structure is from-3480MPa to 1782MPa.Example shows, the utility model is compared with reference examples, and hoop pressure stress increases, and circumferential tensile stress reduces, and circumferential stress distribution is improved.
The composite sheet of embodiment 1 is rolled 75 ° of clampings on fixture, use drop hammer impact testing machine to impact the edge of composite sheet, jump bit quenching hardness HRC60.The composite sheet of the present utility model energy that can withstand shocks reaches 110J and just damages, and the composite sheet of the common boss structure of the reference examples energy that can withstand shocks reaches 50J and namely damages.
The composite sheet of embodiment 1 is rolled 75 ° of clampings on fixture, use drop hammer impact testing machine to impact the edge of composite sheet, jump bit quenching hardness HRC60.The composite sheet of the present utility model energy that can withstand shocks reaches 110J and just damages, and the composite sheet of the common boss structure of the reference examples energy that can withstand shocks reaches 50J and namely damages.
Claims (5)
1. a diamond hard alloy complex sheet, comprise polycrystalline diamond layer and hard alloy substrate, adopt diamond dust and hard alloy substrate to be assembled together, diamond dust sintering forms polycrystalline diamond layer and forms diamond hard alloy complex sheet with hard alloy substrate under high pressure and high temperature condition;
It is characterized in that the assembly interface of described hard alloy substrate has cylindrical boss, boss top end face has the projection in lattice-like;
Upper edge and the lower edge of described cylindrical boss are waveform hierarchic structure; Lower edge is larger than upper edge.
2. diamond hard alloy complex sheet as claimed in claim 1, is characterized in that the projection of described boss top end face is hemispherical.
3. diamond hard alloy complex sheet as claimed in claim 1, is characterized in that the upper edge of described boss is 10-30 ° with the lower angle along connecting line and composite sheet central axial line.
4. diamond hard alloy complex sheet as claimed in claim 1, is characterized in that the waveform hierarchic structure on described upper edge and lower edge adopts rounding off.
5. diamond hard alloy complex sheet as claimed in claim 1, is characterized in that described cylindrical boss upper end also has hemispherical groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420345571.4U CN204139979U (en) | 2014-06-25 | 2014-06-25 | Shock resistance diamond hard alloy complex sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420345571.4U CN204139979U (en) | 2014-06-25 | 2014-06-25 | Shock resistance diamond hard alloy complex sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204139979U true CN204139979U (en) | 2015-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420345571.4U Withdrawn - After Issue CN204139979U (en) | 2014-06-25 | 2014-06-25 | Shock resistance diamond hard alloy complex sheet |
Country Status (1)
| Country | Link |
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| CN (1) | CN204139979U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131786A (en) * | 2014-06-25 | 2014-11-05 | 武汉玖石超硬材料有限公司 | Impact-resistant diamond hard alloy composite sheet |
-
2014
- 2014-06-25 CN CN201420345571.4U patent/CN204139979U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131786A (en) * | 2014-06-25 | 2014-11-05 | 武汉玖石超硬材料有限公司 | Impact-resistant diamond hard alloy composite sheet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150204 Effective date of abandoning: 20170426 |
|
| AV01 | Patent right actively abandoned |