CN212454261U - Diamond composite sheet - Google Patents
Diamond composite sheet Download PDFInfo
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- CN212454261U CN212454261U CN202020895974.1U CN202020895974U CN212454261U CN 212454261 U CN212454261 U CN 212454261U CN 202020895974 U CN202020895974 U CN 202020895974U CN 212454261 U CN212454261 U CN 212454261U
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Abstract
The utility model provides a diamond compact, which comprises a cylindrical hard alloy layer and a cylindrical polycrystalline diamond layer fixedly connected with the hard alloy layer, wherein a diamond coating is arranged on the surface of the polycrystalline diamond layer; the utility model discloses add the pure diamond coating of one deck on traditional high performance polycrystalline diamond compact's basis, on the basis of guaranteeing original performance of original polycrystalline diamond compact by a wide margin improvement its wearability and thermostability, the wearability improves more than 15% than original polycrystalline diamond compact. In the actual use process, the high impact resistance of the traditional high-performance polycrystalline composite sheet reduces the proportion of delaminating and tipping, the addition of the diamond coating greatly improves the composite anti-grinding and heat-resistant performance, the drilling depth of a single drill bit is greatly improved, the drilling efficiency is improved, the drilling times are reduced, and the petroleum and natural gas exploitation cost is greatly reduced.
Description
Technical Field
The utility model relates to an oil and natural gas probing and exploitation, cutting and milling process use superhard composite's preparation technical field, concretely relates to diamond compact piece.
Background
To do this well, the worker should first benefit the device. In the drilling and exploitation technology of petroleum and natural gas, the goals of prolonging the service life of a drill bit, improving the mechanical drilling speed and reducing the drilling times are pursued by all customers, wherein the decisive factor is the performance of a polycrystalline diamond (hereinafter referred to as PDC) composite sheet used on the drill bit. The performance of the current PDC composite sheet and the wear resistance, the shock resistance and the heat resistance of the current PDC composite sheet are greatly improved a few years ago, but along with the improvement of drilling requirements, particularly the situation of abnormal failure such as delamination, chipping and the like often occurs in the current PDC composite sheet due to deep and complex stratum in natural gas exploitation. The wear resistance and the impact resistance of the PDC composite sheet are further improved, and the situations of delamination, chipping and other abnormal failures in the use process are reduced, so that the problem to be solved is solved urgently. However, in the technical level of the existing superhard materials, a relatively large development space is available for improving one index of wear resistance or impact resistance, but the space for improving the two properties is smaller and smaller than that of the previous development space.
In cutting and milling technology, the improvement of the cutter material is most directly effective for improving the cutting efficiency and reducing the cutting cost than any other technology. In the current machining of non-ferrous metal materials, especially in the 3C industry (smart phone panel and back shell machining), the failure mode of the tool material is dominated by the inability to obtain surface finish. Therefore, the improvement of the performance of the cutter material, the improvement of the service life of the cutter and the reduction of the cutter changing times are new process technologies which are researched and developed by increasing the strength in developed countries of various industries.
In order to overcome the defects, in the process of adopting the PDC composite sheet in the petroleum and natural gas, various manufacturers improve the impact resistance effect by changing the geometric shape of the PDC composite sheet on the basis of ensuring the wear resistance. Chinese patents 201513124U, 206000466U, CN101592021A, CN210264536U, etc. disclose PDC composite sheets of different geometric shapes, which change the cutting mode and the residual stress during synthesis in the use process by changing the geometric shape, and the PDC composite sheets of different shapes disclosed in the above patents have the same characteristics that the thickness of the diamond layer at the effective cutting position is greatly increased compared with the conventional PDC composite sheet, thereby improving the impact resistance and the service life of the PDC composite sheet with large cap degree. The problem that the service life of a PDC drill bit is short in some complex stratums is solved by increasing the thickness of the PDC and changing the cutting mode, but the problem that the PDC drill bit is not normally ineffective such as delamination and chipping in the actual use process is not solved, and in some stratums (particularly in soft stratums such as mudstones and super-hard stratums), the mechanical drilling speed is lost due to the small cutting area of the PDC composite sheet, and the drilling completion time of a single well is prolonged.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the above-mentioned prior art, the utility model aims to solve the technical problem that the grinding performance is not enough, easy delaminating and the problem of tipping provide a diamond compact piece to current diamond compact piece when using.
A diamond compact comprises a cylindrical hard alloy layer and a cylindrical polycrystalline diamond layer fixedly connected with the hard alloy layer, wherein a diamond coating is arranged on the surface of the polycrystalline diamond layer.
And a diamond coating is arranged on the upper surface of the polycrystalline diamond layer.
A diamond coating is disposed on the polycrystalline diamond layer to shield the polycrystalline diamond layer.
The thickness of the polycrystalline diamond layer is 0.2mm-10mm, and the thickness of the diamond coating is 10 nm-1 mm.
The particle size of the polycrystalline diamond micro powder and the metal binder of the polycrystalline diamond layer is 0.2-100 mu m.
The particle size of the polycrystalline diamond micro powder and the metal binder of the polycrystalline diamond layer is 0.2-60 mu m.
The diamond micro powder particle size of the diamond coating is 10 nm-100 nm.
The diamond micro powder particle size of the diamond coating is 0.1-10 mu m.
The utility model discloses add the pure diamond coating of one deck on traditional high performance polycrystalline diamond compact's basis, on the basis of guaranteeing original performance of original polycrystalline diamond compact by a wide margin improvement its wearability and thermostability, the wearability improves more than 15% than original P polycrystalline diamond compact. In the actual use process, the high impact resistance of the traditional high-performance polycrystalline composite sheet reduces the proportion of delaminating and tipping, the addition of the diamond coating greatly improves the composite anti-grinding and heat-resistant performance, the drilling depth of a single drill bit is greatly improved, the drilling efficiency is improved, the drilling times are reduced, and the petroleum and natural gas exploitation cost is greatly reduced.
The utility model discloses a high performance polycrystalline diamond compact is applicable to high-speed cutting process and precision finishing, and the smooth finish on surface when precision machinery worker is processed is guaranteed on the pure diamond layer of surface one deck fine grit, can replace the mill with milling, especially in the 3C trade that requires very high surface finish, simultaneously because the surface is pure diamond layer, its heat resistance can promote the degree by a wide margin, can guarantee high-speed machine man-hour stability, improve the life-span of cutter, reduce the tool changing number, very big improvement production efficiency.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is another schematic structural diagram of the present invention.
Wherein 101 is a hard alloy layer, 102 is a polycrystalline diamond layer, and 103 is a diamond layer.
Detailed Description
A diamond compact comprises a cylindrical hard alloy layer 101 and a cylindrical polycrystalline diamond layer 102 fixedly connected with the hard alloy layer, wherein a diamond coating 103 is arranged on the surface of the polycrystalline diamond layer.
As depicted in fig. 1, polycrystalline diamond 102 may have a diamond coating 103 disposed on an upper surface thereof. So that the diamond compact has a regular cylindrical shape.
As shown in fig. 2, a diamond coating 103 is disposed on the polycrystalline diamond layer 102 to mask the polycrystalline diamond layer. That is, the surface not in contact with the hard alloy layer 101 is provided with the diamond coating layer 103 so that the diamond compact has a regular cylindrical shape.
The thickness of the polycrystalline diamond layer 102 is 0.2mm-10mm, and the thickness of the diamond coating 103 is 10 nm-1 mm.
The grain size of the polycrystalline diamond micro powder and the metal binder of the polycrystalline diamond layer 102 is 0.2-100 μm.
The grain size of the polycrystalline diamond micro powder and the metal binder of the polycrystalline diamond layer 102 is 0.2-60 mu m.
The diamond micro powder granularity of the diamond coating 103 is 10 nm-100 nm.
The diamond micro powder granularity of the diamond coating 103 is 0.1-10 mu m.
The utility model discloses a high performance polycrystalline diamond compact: including a hard alloy layer 101, a polycrystalline diamond layer 102, and a pure diamond layer 103. The polycrystalline diamond polycrystalline layer 102 comprises polycrystalline diamond micro powder and a high-temperature metal binder, and is formed by sintering a hard alloy substrate at high temperature and high pressure, wherein the thickness of the polycrystalline diamond micro powder is 0.5mm, the average grain size of the polycrystalline diamond micro powder and the high-temperature metal binder is 10 micrometers, the diamond coating layer is 0.1mm thick, and the grain size of the diamond micro powder is about 50 nm.
The preparation method comprises the following steps:
(1) mixing diamond micro powder with different grain sizes to obtain diamond micro powder with the average grain size of 10 mu m, performing high-temperature vacuum purification treatment and secondary mixing, removing surface passivation substances, pollutants and oxides from the hard alloy matrix by adopting sand blasting, cleaning by using acetone, and drying;
(2) putting the diamond micropowder treated in the step (1) and a hard alloy matrix into a niobium cup, and then carrying out high-temperature vacuum purification treatment and vacuum packaging treatment to form a vacuum sealed inner core for synthesis;
(3) placing the synthesis inner core processed in the step (2) into a pyrophyllite high-temperature high-pressure synthesis cavity, and sintering by using a cubic press with the pressure of 5.5GPa and the temperature of 1400 ℃ and 1500 ℃ to form a polycrystalline diamond-hard alloy matrix composite sheet;
(4) machining the sintered polycrystalline diamond-hard alloy matrix composite sheet into a semi-finished polycrystalline diamond composite sheet in mechanical machining modes such as sand blasting, cylindrical grinding, grinding and the like;
(5) cleaning the surface of the diamond layer of the semi-finished polycrystalline diamond compact processed in the step (4) in a chemical corrosion, electrolysis, sand blasting and other modes to obtain a precursor polycrystalline compact;
(6) forming a pure diamond layer with the granularity of 50nm and the thickness of 0.1mm on the surface of the precursor polycrystalline diamond compact obtained in the step (5) by a chemical vapor deposition method; wherein the diamond powder granularity can be 10nm or 100 nm;
(7) and (4) carrying out mechanical processing such as polishing on the polycrystalline diamond compact obtained in the step (6) to obtain the high-performance coated polycrystalline diamond compact.
The material is mainly used for the precision processing of nonferrous metal and the processing of non-metallic materials such as composite materials, ceramics, glass, wood and the like.
The utility model discloses a high performance polycrystalline diamond compact: comprises a hard alloy substrate, a polycrystalline diamond polycrystalline layer and a pure diamond layer. The polycrystalline diamond polycrystalline layer comprises polycrystalline diamond micro powder and a high-temperature metal binder, and is formed by sintering a hard alloy substrate at high temperature and high pressure, the thickness of the polycrystalline diamond polycrystalline layer is 0.5mm, the average particle size of the polycrystalline diamond micro powder and the high-temperature metal binder is 25 micrometers, wherein the pure diamond layer is 0.15mm thick, and the particle size of the diamond micro powder is about 50 nm.
The utility model discloses a preparation method of high performance polycrystalline diamond compact:
(1) mixing diamond micro powder with different grain sizes to obtain diamond micro powder with the average grain size of 25 mu m, performing high-temperature vacuum purification treatment and secondary mixing, removing surface passivation substances, pollutants and oxides from the hard alloy matrix by adopting sand blasting, cleaning by using acetone, and drying;
(2) putting the diamond micropowder treated in the step (1) and a hard alloy matrix into a niobium cup, and then carrying out high-temperature vacuum purification treatment and vacuum packaging treatment to form a vacuum sealed inner core for synthesis;
(3) placing the synthesis inner core processed in the step (2) into a pyrophyllite high-temperature high-pressure synthesis cavity, and sintering by using a cubic press with the pressure of 5GPa and the temperature of 1500 ℃ to form a polycrystalline diamond compact;
(4) machining the sintered polycrystalline diamond-hard alloy matrix composite sheet into a semi-finished polycrystalline diamond composite sheet in mechanical machining modes such as sand blasting, cylindrical grinding, grinding and the like;
(5) cleaning the surface of the diamond layer of the semi-finished polycrystalline diamond compact processed in the step (4) in the modes of chemical corrosion, electrolysis, sand blasting and the like to obtain a precursor polycrystalline diamond compact;
(6) forming a diamond coating with the granularity of 50nm and the thickness of 0.15mm on the surface of the precursor polycrystalline diamond compact obtained in the step (5) by using a chemical vapor deposition or physical vapor deposition method on the precursor polycrystalline diamond compact obtained in the step (5); the granularity of the diamond micro powder can be any granularity between 10nm and 100 nm.
(7) And (4) carrying out surface polishing and other processing on the polycrystalline diamond compact coated in the step (6) to obtain the high-performance polycrystalline diamond compact.
This material is mainly used in the manufacture of cutting and milling cutter inserts.
The utility model discloses a high performance polycrystalline diamond compact: comprises a hard alloy substrate, a polycrystalline diamond polycrystalline layer and a pure diamond layer. The polycrystalline diamond polycrystalline layer comprises polycrystalline diamond micro powder and a high-temperature metal binder, and is formed by sintering a hard alloy substrate at high temperature and high pressure, the thickness of the polycrystalline diamond polycrystalline layer is 0.25mm, the average grain size of the polycrystalline diamond micro powder and the metal binder is 4 microns, wherein the thickness of the pure diamond layer is 0.15mm, and the grain size of the diamond micro powder is about 50nm, or 0.1 micron or 10 microns.
The utility model discloses a preparation method of high performance polycrystalline diamond compact:
(1) mixing diamond micro powder with different grain sizes to obtain diamond micro powder with the average grain size of 4 mu m, performing high-temperature vacuum purification treatment and secondary mixing, removing surface passivation substances, pollutants and oxides from the hard alloy matrix by adopting sand blasting, cleaning by using acetone, and drying;
(2) putting the diamond micropowder treated in the step (1) and a hard alloy matrix into a niobium cup, and then carrying out high-temperature vacuum purification treatment and vacuum packaging treatment to form a vacuum sealed inner core for synthesis;
(3) placing the synthesis inner core processed in the step (2) into a pyrophyllite high-temperature high-pressure synthesis cavity, and sintering by using a cubic press with the pressure of 5.5GPa and the temperature of 1400 ℃ and 1500 ℃ to form a polycrystalline diamond-hard alloy matrix composite sheet;
(4) machining the sintered polycrystalline diamond-hard alloy matrix composite sheet into a semi-finished polycrystalline diamond composite sheet by mechanical processing modes such as sand blasting, cylindrical grinding, grinding and the like;
(5) cleaning the surface of the diamond layer of the semi-finished polycrystalline diamond compact processed in the step (4) in the modes of chemical corrosion, electrolysis, sand blasting and the like to obtain a precursor polycrystalline diamond compact;
(6) forming a diamond coating with the granularity of 50nm and the thickness of 0.15mm on the surface of the precursor polycrystalline diamond compact obtained in the step (5) by using a chemical vapor deposition or physical vapor deposition method on the precursor polycrystalline diamond compact obtained in the step (5);
(7) and (4) carrying out mechanical processing such as polishing on the coated diamond compact obtained in the step (6) to obtain the high-performance polycrystalline diamond compact.
This material is mainly used in the manufacture of cutting and milling cutter inserts.
The utility model discloses a polycrystalline diamond compact piece is scribbled to high performance: comprises a hard alloy substrate, a polycrystalline diamond polycrystalline layer and a diamond coating. The polycrystalline diamond polycrystalline layer comprises polycrystalline diamond micro powder and a high-temperature metal binder, and is formed by sintering a hard alloy substrate at high temperature and high pressure, the diameter of the polycrystalline diamond polycrystalline layer is 10mm, 13mm, 16mm and 19mm, the thickness of the polycrystalline diamond layer is 2-3mm, the typical value of the polycrystalline diamond layer is 2.6mm, the average particle size of the polycrystalline diamond micro powder and the metal binder is 10-60 mu m, the typical value of the polycrystalline diamond layer is 25 mu m, the thickness of a diamond coating is 0.1-0.15mm, and the particle size of the diamond micro powder is about 50 nm.
The utility model discloses a preparation method of high performance polycrystalline diamond compact:
(1) mixing diamond micro powder with different grain sizes to obtain diamond micro powder with the average grain size of 25 mu m, performing high-temperature vacuum purification treatment and secondary mixing, removing surface passivation substances, pollutants and oxides from the hard alloy matrix by adopting sand blasting, cleaning by using acetone, and drying;
(2) putting the diamond micropowder treated in the step (1) and a hard alloy matrix into a niobium cup, and then carrying out high-temperature vacuum purification treatment and vacuum packaging treatment to form a vacuum sealed inner core for synthesis;
(3) placing the synthesis inner core processed in the step (2) into a pyrophyllite high-temperature high-pressure synthesis cavity, and sintering by using a cubic press with the pressure of 7GPa and the temperature of 1500 ℃ to form a polycrystalline diamond-hard alloy matrix composite sheet;
(4) machining the sintered polycrystalline diamond-hard alloy matrix composite sheet into a semi-finished PDC composite sheet in mechanical machining modes such as sand blasting, cylindrical grinding, grinding and the like;
(5) removing high-temperature metal in the diamond layer by means of chemical corrosion, electrolysis and the like from the semi-finished PDC composite sheet processed in the step (4), wherein the removal depth is 500 mu m, and thus obtaining a precursor PDC composite sheet;
(6) forming a diamond coating with the granularity of 50nm and the thickness of 0.1-0.15mm on the surface of the precursor PDC obtained in the step (5) by using the PDC obtained in the step (5) and without the surface high-temperature metal through a chemical vapor deposition or physical vapor deposition method to obtain a high-performance polycrystalline diamond compact finished product;
the material is mainly applied to the manufacture of drilling teeth for petroleum and natural gas exploitation.
The utility model discloses a high performance polycrystalline diamond compact: comprises a hard alloy substrate, a polycrystalline diamond polycrystalline layer and a pure diamond layer. The polycrystalline diamond polycrystalline layer comprises polycrystalline diamond micro powder and a high-temperature metal binder, and is formed by sintering a hard alloy substrate at high temperature and high pressure, the diameter of the polycrystalline diamond polycrystalline layer is 10mm, 13mm, 16mm and 19mm, the thickness of the polycrystalline diamond layer is 2-3mm, the typical value is 2.6mm, the average granularity of the polycrystalline diamond micro powder and the metal binder is 10-60 mu m, the typical value is 25 mu m, wherein the thickness of a pure diamond layer is 0.1mm, the granularity of the diamond micro powder is about 50nm, and the granularity of the diamond micro powder can be any size between 0.1 mu m and 10 mu m.
The utility model discloses a preparation method of high performance polycrystalline diamond compact:
(1) mixing diamond micro powder with different grain sizes to obtain diamond micro powder with the average grain size of 25 mu m, performing high-temperature vacuum purification treatment and secondary mixing, removing surface passivation substances, pollutants and oxides from the hard alloy matrix by adopting sand blasting, cleaning by using acetone, and drying;
(2) putting the diamond micropowder treated in the step (1) and a hard alloy matrix into a niobium cup, and then carrying out high-temperature vacuum purification treatment and vacuum packaging treatment to form a vacuum sealed inner core for synthesis;
(3) placing the synthesis inner core processed in the step (2) into a pyrophyllite high-temperature high-pressure synthesis cavity, and sintering by using a cubic press with the pressure of 6.5GPa and the temperature of 1500 ℃ to form a polycrystalline diamond-hard alloy matrix composite sheet;
(4) machining the sintered polycrystalline diamond-hard alloy matrix composite sheet into a semi-finished PDC composite sheet in mechanical machining modes such as sand blasting, cylindrical grinding, grinding and the like;
(5) removing high-temperature metal in the diamond layer by means of chemical corrosion, electrolysis and the like from the semi-finished PDC composite sheet processed in the step (4), wherein the removal depth is 700 mu m to obtain a semi-precursor PDC composite sheet;
(6) filling a certain amount of nano diamond micro powder with a typical value of 50nm into a niobium cup, filling the PDC composite sheet obtained in the step (5) and subjected to high-temperature vacuum packaging treatment, wherein the surface high-temperature metal of the PDC composite sheet is removed;
(7) and (4) placing the synthesis inner core processed in the step (6) into a pyrophyllite high-temperature high-pressure synthesis cavity, and sintering by using a cubic press with the pressure of 7GPa and the temperature of 1500 ℃ to form the polycrystalline diamond-hard alloy matrix composite sheet.
The material is mainly applied to the manufacture of drilling teeth for petroleum and natural gas exploitation.
Others refer to the prior art.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.
Claims (8)
1. The utility model provides a diamond compact, includes cylindrical carbide layer and with cylindrical polycrystalline diamond layer of carbide layer fixed connection, its characterized in that: and a diamond coating is arranged on the surface of the polycrystalline diamond layer.
2. The diamond compact of claim 1, wherein: and a diamond coating is arranged on the upper surface of the polycrystalline diamond layer.
3. The diamond compact of claim 1, wherein: a diamond coating is disposed on the polycrystalline diamond layer to shield the polycrystalline diamond layer.
4. The diamond compact of claim 1, wherein: the thickness of the polycrystalline diamond layer is 0.2mm-10mm, and the thickness of the diamond coating is 10 nm-1 mm.
5. The diamond compact of claim 4, wherein: the particle size of the polycrystalline diamond micro powder and the metal binder of the polycrystalline diamond layer is 0.2-100 mu m.
6. The diamond compact of claim 5, wherein: the particle size of the polycrystalline diamond micro powder and the metal binder of the polycrystalline diamond layer is 0.2-60 mu m.
7. The diamond compact of claim 4, wherein: the diamond micro powder particle size of the diamond coating is 10 nm-100 nm.
8. The diamond compact of claim 4, wherein: the diamond micro powder particle size of the diamond coating is 0.1-10 mu m.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113004865A (en) * | 2021-03-05 | 2021-06-22 | 河南晶锐新材料股份有限公司 | Polycrystalline diamond compact vacuum packaging flow choking agent and flow choking structure |
| CN113245545A (en) * | 2021-04-15 | 2021-08-13 | 中石化江钻石油机械有限公司 | Diamond composite sheet inner synthesis mold packaging structure and packaging method |
| CN113976892A (en) * | 2021-09-30 | 2022-01-28 | 河南晶锐新材料股份有限公司 | Manufacturing method of low-residual-stress polycrystalline diamond compact |
| GB2607425A (en) * | 2021-04-22 | 2022-12-07 | Element Six Ltd | Method of making a shaped tool component |
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2020
- 2020-05-25 CN CN202020895974.1U patent/CN212454261U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113004865A (en) * | 2021-03-05 | 2021-06-22 | 河南晶锐新材料股份有限公司 | Polycrystalline diamond compact vacuum packaging flow choking agent and flow choking structure |
| CN113245545A (en) * | 2021-04-15 | 2021-08-13 | 中石化江钻石油机械有限公司 | Diamond composite sheet inner synthesis mold packaging structure and packaging method |
| GB2607425A (en) * | 2021-04-22 | 2022-12-07 | Element Six Ltd | Method of making a shaped tool component |
| GB2607425B (en) * | 2021-04-22 | 2023-07-26 | Element Six Ltd | Method of making a shaped tool component |
| CN113976892A (en) * | 2021-09-30 | 2022-01-28 | 河南晶锐新材料股份有限公司 | Manufacturing method of low-residual-stress polycrystalline diamond compact |
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