CN108161362B - Polycrystalline diamond compact and manufacturing method thereof - Google Patents
Polycrystalline diamond compact and manufacturing method thereof Download PDFInfo
- Publication number
- CN108161362B CN108161362B CN201711450748.1A CN201711450748A CN108161362B CN 108161362 B CN108161362 B CN 108161362B CN 201711450748 A CN201711450748 A CN 201711450748A CN 108161362 B CN108161362 B CN 108161362B
- Authority
- CN
- China
- Prior art keywords
- diamond
- layer
- hard alloy
- polycrystalline diamond
- ball milling
- 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
- 239000010432 diamond Substances 0.000 title claims abstract description 266
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 266
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000000956 alloy Substances 0.000 claims abstract description 76
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 76
- 238000000498 ball milling Methods 0.000 claims abstract description 49
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 39
- 239000010937 tungsten Substances 0.000 claims abstract description 39
- 239000011159 matrix material Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims description 127
- 239000000843 powder Substances 0.000 claims description 80
- 239000002245 particle Substances 0.000 claims description 44
- 238000005245 sintering Methods 0.000 claims description 22
- -1 polytetrafluoroethylene Polymers 0.000 claims description 15
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 15
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000003786 synthesis reaction Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000002344 surface layer Substances 0.000 claims description 4
- 230000002194 synthesizing effect Effects 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 6
- 238000005065 mining Methods 0.000 abstract description 6
- 238000005520 cutting process Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 7
- 230000006978 adaptation Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Powder Metallurgy (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a polycrystalline diamond compact and a manufacturing method thereof, the polycrystalline diamond compact comprises a hard alloy matrix layer and a polycrystalline diamond layer, the polycrystalline diamond layer is connected on the hard alloy matrix layer, the polycrystalline diamond layer is composed of a plurality of diamond sub-layers, and tungsten elements are introduced into each diamond sub-layer through a ball milling process; the tungsten element content in each sub-diamond layer is different, so that the tungsten elements in the polycrystalline diamond layer are distributed in a gradient manner. The manufacturing process of the invention is simple to operate, and the tungsten element is uniformly distributed; the diamond composite sheet disclosed by the invention not only ensures the inherent wear resistance of the diamond composite sheet, but also improves the impact resistance, has the characteristics of high wear resistance, good impact resistance, good thermal stability, high cutting efficiency, long service life, multiple strata adaptability and the like, greatly reduces the tripping frequency in the drilling process, reduces the mining cost and improves the mining efficiency.
Description
Technical Field
The invention belongs to the technical field of superhard composite materials, and particularly relates to a polycrystalline diamond compact and a manufacturing method thereof.
Background
The polycrystalline diamond compact is a superhard material formed by sintering a hard alloy matrix and diamond powder at high temperature and high pressure, and has excellent performances of high hardness and high wear resistance. The diamond drill bit is mainly used on a diamond drill bit and is widely applied to the fields of geological drilling, oil and natural gas exploitation.
Although bonding the polycrystalline diamond layer and the cemented carbide may combine the advantages of both materials into a single product. But due to the inherent differences in the properties of these two materials, their interface becomes the most vulnerable area of the product. At present, a polycrystalline diamond compact is mainly formed by directly combining a polycrystalline layer and a hard alloy layer, and as physical parameters such as the thermal expansion coefficient, the elastic modulus and the like of the polycrystalline diamond layer and the hard alloy layer are greatly different in a high-temperature and high-pressure sintering process (the polycrystalline diamond layer has the thermal expansion coefficient of 2.6 multiplied by 10 < -6 > K < -1 >, the elastic modulus of 890Gpa and the hard alloy layer has the thermal expansion coefficient of 5.4 multiplied by 10 < -6 > K < -1 >, and the elastic modulus of 580Gpa), when the two materials are directly combined, a large residual stress can be generated, and the release of the residual stress is one of factors causing the tooth breakage of the compact in the use process of the polycrystalline diamond compact; meanwhile, due to the large difference between the thermal expansion coefficients of the hard alloy and the diamond, the diamond compact can be cracked due to heat generated by rapid friction when the diamond compact is used.
The focus of research by various diamond compact manufacturers is to ensure the wear resistance of the diamond compact and improve the impact resistance of the compact. The prior art mainly improves the impact toughness and the wear resistance of products by adjusting the diamond granularity, the upper end of the polycrystalline diamond of the structure forms a cutting edge by fine-grained diamond, so that the products have higher wear resistance, and the diamond polycrystalline layer close to the end of the hard alloy substrate consists of coarse-grained diamond, so that the products have better impact toughness. The method can prepare the polycrystalline diamond compact with higher comprehensive performance. However, in the practical drilling application process, the impact toughness of the fine-grained polycrystalline layer is still poor, and the fine-grained polycrystalline layer is easy to crack and lose efficacy, so that the service life of the product is shortened.
In summary, a polycrystalline diamond compact and a preparation method thereof are provided to improve the wear resistance and impact resistance of the polycrystalline diamond compact, further prolong the service life of the polycrystalline diamond compact and improve the continuous working efficiency, which are technical problems to be solved by technical personnel in the technical field at present.
Disclosure of Invention
The invention provides a polycrystalline diamond compact and a manufacturing method thereof in order to overcome the defects in the prior art, so that the wear resistance and the impact resistance of the polycrystalline diamond compact are improved, the service life of the polycrystalline diamond compact is further prolonged, and the continuous working efficiency is improved.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a polycrystalline diamond compact comprises a hard alloy matrix layer and a polycrystalline diamond layer, wherein the polycrystalline diamond layer is connected on the hard alloy matrix layer; the polycrystalline diamond layer is composed of a plurality of sub diamond layers, and each sub diamond layer contains tungsten element; the tungsten element content in each sub-diamond layer is different, so that the tungsten elements in the polycrystalline diamond layer are distributed in a gradient manner; the content of tungsten element in the polycrystalline diamond layer far away from the hard alloy matrix layer is lower than that in the polycrystalline diamond layer close to the hard alloy matrix layer.
As a further scheme of the invention, the polycrystalline diamond layer comprises 70-95 parts by mass of diamond particles with the particle size of 10-40 microns and 5-30 parts by mass of diamond particles with the particle size of 1-10 microns.
As a further scheme of the invention, the content of tungsten element in the sub-diamond layer far away from the surface layer of the hard alloy matrix layer is 0.5-2%, the content of tungsten in the sub-diamond layer of the next layer is 1-4 times that of the sub-diamond layer of the previous layer from the surface layer of the polycrystalline diamond layer to the inner layer.
As a further aspect of the present invention, the hard alloy substrate layer and the polycrystalline diamond layer of the polycrystalline diamond compact are integrally formed in a cylindrical shape.
The invention also provides a method for manufacturing the polycrystalline diamond compact, which comprises the following steps:
1) mixing 70-95 parts of diamond particles with the particle size of 10-40 microns, 5-30 parts of diamond particles with the particle size of 1-10 microns and 150-625 parts of hard alloy balls, dividing the mixed particles into a plurality of parts, respectively placing each part of the mixed particles in a container made of polytetrafluoroethylene, and sealing the container;
2) placing each polytetrafluoroethylene container filled with the mixed particles in the step 1) on a planetary ball mill for ball milling treatment, and obtaining a plurality of batches of diamond powder after ball milling treatment according to different ball milling time;
3) respectively purifying the diamond powder subjected to ball milling treatment in each batch in the step 2);
4) sequentially putting the diamond powder with short ball milling time and the diamond powder with long ball milling time into a metal cup, then putting a hard alloy matrix on the diamond powder, and then compacting the hard alloy matrix and the diamond powder;
5) assembling the compacted hard alloy matrix, the diamond powder and the metal cup assembly in a special synthesis die for synthesizing the composite sheet to integrally form a synthesis block;
6) sintering the synthesized block in the step 5) at high temperature and high pressure to obtain a diamond compact blank;
7) processing the diamond compact blank into a standard size;
8) and carrying out quality detection on the processed diamond compact according to the requirements to obtain a finished product meeting the requirements.
As a further scheme of the invention, the hard alloy ball in the step 1) is a sphere with the diameter of 2-8mm, and the hard alloy ball is made of 84-95% of tungsten carbide and 5-16% of cobalt.
As a further scheme of the invention, the ball milling treatment of the mixed particles of the diamond particles and the hard alloy balls comprises the following specific steps:
1) starting the planetary ball mill, and setting the ball milling speed at 150-;
2) taking a plurality of mixed particles consisting of diamond particles and hard alloy balls, putting each mixed particle in a polytetrafluoroethylene container, putting each polytetrafluoroethylene container filled with the mixed particles on a planetary ball mill, and starting ball milling treatment after setting different ball milling time for each mixed particle; and after the ball milling is finished, respectively taking out each part of diamond powder and each part of hard alloy ball, respectively filtering the hard alloy balls on a mesh screen, leaving the diamond powder subjected to the respective ball milling treatment, and marking for later use.
As a further aspect of the present invention, the purification treatment process comprises the steps of:
1) placing the diamond powder subjected to ball milling treatment in a sintering furnace in a hydrogen atmosphere, preserving the heat for 30-60 minutes at the temperature of 600-700 ℃, cooling to room temperature after the heat preservation is finished, and taking out the diamond powder;
2) then placing the diamond powder in a vacuum sintering furnace, and keeping the vacuum degree value not higher than 10-2And (3) keeping the temperature of 600-800 ℃ for 45-120 minutes under the condition of Pa, cooling to room temperature after the temperature is up, and taking out the diamond powder for later use.
As a further scheme of the invention, the sintering temperature of the synthesized block in the step 6) is 1300-1700 ℃, and the pressure is 5-8 GPa.
As a further scheme of the invention, the diamond compact blank standard size processing procedure comprises the following steps:
1) grinding the excircle of the diamond compact blank, and processing the excircle of the diamond compact blank to a standard size;
2) processing the end face of the hard alloy substrate layer of the diamond compact blank to a standard size;
3) processing the end face of the polycrystalline diamond layer of the diamond compact blank to a standard size;
4) and chamfering to process the polycrystalline diamond layer and the hard alloy substrate layer of the diamond compact blank to the standard size.
Compared with the prior art, the invention has the beneficial effects that: the manufacturing method of the diamond compact of the invention introduces a proper amount of tungsten element into the polycrystalline diamond layer through the ball milling process, and ensures that the tungsten element is distributed in the polycrystalline diamond layer in a gradient way, the manufacturing process is simple to operate, and the tungsten element is distributed uniformly; the diamond composite sheet manufactured by the process of the invention not only ensures the inherent wear resistance of the diamond composite sheet, but also improves the impact resistance of the diamond composite sheet, has the characteristics of high wear resistance, good impact resistance, good thermal stability, high cutting efficiency, long service life, multiple stratum adaptation and the like, greatly reduces the tripping frequency in the drilling process, reduces the mining cost and improves the mining efficiency.
Drawings
Fig. 1 is a schematic cross-sectional view of a polycrystalline diamond compact according to example 1.
Fig. 2 is a schematic cross-sectional view of the polycrystalline diamond compact of example 2.
Detailed Description
The following examples are presented to illustrate certain embodiments of the invention in particular and should not be construed as limiting the scope of the invention. The present disclosure may be modified from materials, methods, and reaction conditions at the same time, and all such modifications are intended to be within the spirit and scope of the present invention.
The polycrystalline diamond compact provided by the invention is different from the conventional polycrystalline diamond compact in that a proper amount of tungsten element is introduced into the polycrystalline diamond layer, and the tungsten element is distributed in the polycrystalline diamond layer in a gradient way; and the gradient distribution of the tungsten element is realized by a ball milling process. The polycrystalline diamond layer is composed of a plurality of sub diamond layers, and each sub diamond layer contains tungsten element; the tungsten element content in each sub-diamond layer is different, so that the tungsten elements in the polycrystalline diamond layer are distributed in a gradient manner; the content of tungsten element in the polycrystalline diamond layer gradually increases from the position far away from the hard alloy base layer to the position close to the hard alloy base layer. According to different drilling environments, the requirements on the physical properties of the diamond compact are different, and the number of sub-diamond layers and the content of tungsten in each sub-diamond layer are also different.
Example 1
As shown in fig. 1, a cylindrical polycrystalline diamond compact includes a hard alloy substrate layer 1 and a polycrystalline diamond layer 2, wherein the polycrystalline diamond layer 2 is connected to the hard alloy substrate layer 1; the polycrystalline diamond layer 2 is composed of 3 sub-diamond layers (a first sub-diamond layer 21, a second sub-diamond layer 22 and a third sub-diamond layer 23, respectively) each containing tungsten; the tungsten element content in each sub-diamond layer is different, so that the tungsten element in the polycrystalline diamond layer 2 is distributed in a gradient way; the content of tungsten in the polycrystalline diamond layer 2 gradually increases from the third sub-diamond layer 23 to the first sub-diamond layer 21. The polycrystalline diamond compact is prepared by the following manufacturing process.
The manufacturing method of the diamond compact comprises the following steps:
1. preparing the material
(1) Taking diamond powder with the granularity of 20-30 microns, diamond powder with the granularity of 2-4 microns, a hard alloy matrix and a hard alloy ball with the diameter of 2-8 mm;
(2) mixing diamond powder with the particle size of 20-30 microns and diamond powder with the particle size of 2-4 microns according to the proportion of 85: 15, evenly dividing the mixed particles into 3 parts, and mixing each part of the mixed particles with the hard alloy balls according to the weight ratio of 1: 3 and placing the mixture in containers made of polytetrafluoroethylene for sealing.
2. Ball milling treatment procedure
(1) And starting the planetary ball mill, and setting the ball milling rotating speed to be 200 revolutions per minute.
(2) Firstly, placing a first polytetrafluoroethylene container containing diamond powder and hard alloy balls on a planetary ball mill, setting the ball milling time to be 80-100 minutes, and starting ball milling; after the ball milling is finished, taking out the diamond powder and the hard alloy balls, filtering the hard alloy balls on a mesh screen, leaving the diamond powder, and making a mark as first diamond layer powder for later use;
(3) then placing a second polytetrafluoroethylene container containing diamond powder and hard alloy balls on a planetary ball mill, setting the ball milling time to be 45-60 minutes, and starting ball milling; after the ball milling is finished, taking out the diamond powder and the hard alloy balls, filtering the hard alloy balls on a mesh screen, leaving the diamond powder, and making a mark as second diamond layer powder for later use;
(4) finally, placing a third polytetrafluoroethylene container containing diamond powder and hard alloy balls on a planetary ball mill, setting the ball milling time to be 15-25 minutes, and starting ball milling; and after the ball milling is finished, taking out the diamond powder and the hard alloy balls, filtering the hard alloy balls on a mesh screen to leave the diamond powder, and marking the diamond powder as third sub-diamond layer powder for later use.
3. Respectively purifying 3 parts of ball-milled powder
(1) Firstly, placing diamond layer powder in a sintering furnace, keeping the temperature of 650 ℃ for 45 minutes in a hydrogen atmosphere, cooling to room temperature after the temperature is reduced, and taking out the diamond layer powder;
(2) then placing the diamond layer powder in a vacuum sintering furnace, and enabling the vacuum degree value to reach 10-2Keeping the temperature at 700 ℃ for 60 minutes under the condition of Pa and below, cooling to room temperature after the temperature is finished, and taking out the diamond layer powder for later use.
4. Compacting
(1) Sequentially putting the purified powder into a metal cup, firstly putting the third sub-diamond layer powder, then putting the second sub-diamond layer powder and finally putting the third sub-diamond layer powder;
(2) and then placing the hard alloy matrix on the diamond powder, and then compacting the hard alloy matrix and the diamond powder by using a hydraulic press.
5. Synthesis of
And assembling the compacted hard alloy matrix, the diamond powder and the metal cup assembly in a special synthesis die for synthesizing the composite sheet to integrally form a synthesis block.
6. Sintering
And placing the synthetic block in a pressure cavity of a cubic diamond hydraulic press, and sintering at high temperature and high pressure, wherein the sintering temperature is 1300-1700 ℃, and the sintering pressure is 5-8GPa, so as to obtain the diamond compact blank.
7. Machining
(1) Firstly, grinding the excircle of a diamond compact blank on a centerless grinder, and processing the excircle of the diamond compact blank to a standard size;
(2) processing the substrate end surface of the diamond compact blank to the standard requirement on a grinding machine, and processing the diamond end surface of the diamond compact blank to the standard requirement;
(3) and finally, chamfering the diamond layer and the matrix of the diamond compact blank to the standard requirement.
8. Quality detection
And carrying out quality detection on the processed diamond compact according to the requirements to obtain a finished product meeting the requirements.
Example 2
As shown in fig. 2, a cylindrical polycrystalline diamond compact includes a hard alloy substrate layer 1 and a polycrystalline diamond layer 2, wherein the polycrystalline diamond layer 2 is connected to the hard alloy substrate layer 1; the difference from example 1 is that the polycrystalline diamond layer of example 2 is composed of 2 diamond layers (first sub-diamond layers 24 and second sub-diamond layers 25, respectively) each containing tungsten element; the content of tungsten element in each sub-diamond layer is different, and the content of tungsten element in the first sub-diamond layer 24 is larger than that in the second sub-diamond layer 25. The polycrystalline diamond compact is prepared by the following manufacturing process.
The manufacturing method of the diamond compact comprises the following steps:
1. preparing the material
(1) Taking diamond powder with the granularity of 20-30 microns, diamond powder with the granularity of 2-6 microns, a hard alloy matrix and a hard alloy ball with the diameter of 2-8 mm;
(2) mixing diamond powder with the particle size of 20-30 microns and diamond powder with the particle size of 2-4 microns according to the weight ratio of 80: 20, evenly dividing the mixed particles into 2 parts, and mixing each part of the mixed particles with the hard alloy balls according to the weight ratio of 1: 3 and placing the mixture in containers made of polytetrafluoroethylene for sealing.
2. Ball milling treatment procedure
(1) And starting the planetary ball mill, and setting the ball milling rotating speed to be 200 revolutions per minute.
(2) Firstly, placing a first polytetrafluoroethylene container containing diamond powder and hard alloy balls on a planetary ball mill, setting the ball milling time to be 60-90 minutes, and starting ball milling; after the ball milling is finished, taking out the diamond powder and the hard alloy balls, filtering the hard alloy balls on a mesh screen, leaving the diamond powder, and making a mark as first diamond layer powder for later use;
(3) placing a second polytetrafluoroethylene container containing diamond powder and hard alloy balls on a planetary ball mill for 25-35 minutes, and starting ball milling; and after the ball milling is finished, taking out the diamond powder and the hard alloy balls, filtering the hard alloy balls on a mesh screen to leave the diamond powder, and marking the diamond powder as second diamond layer powder for later use.
3. Respectively purifying 2 parts of ball-milled powder
(1) Firstly, placing diamond layer powder in a sintering furnace, keeping the temperature of 650 ℃ for 45 minutes in a hydrogen atmosphere, cooling to room temperature after the temperature is reduced, and taking out the diamond layer powder;
(2) then placing the diamond layer powder in a vacuum sintering furnace, and enabling the vacuum degree value to reach 10-2Keeping the temperature at 700 ℃ for 60 minutes under the condition of Pa and below, cooling to room temperature after the temperature is finished, and taking out the diamond layer powder for later use.
4. Compacting
(1) Sequentially putting the purified powder into a metal cup, putting the second sub-diamond layer powder, and putting the first sub-diamond layer powder;
(2) and then placing the hard alloy matrix on the diamond powder, and then compacting the hard alloy matrix and the diamond powder by using a hydraulic press.
5. Synthesis of
And assembling the compacted hard alloy matrix, the diamond powder and the metal cup assembly in a special synthesis die for synthesizing the composite sheet to integrally form a synthesis block.
6. Sintering
And placing the synthetic block in a pressure cavity of a cubic diamond hydraulic press, and sintering at high temperature and high pressure, wherein the sintering temperature is 1300-1700 ℃, and the sintering pressure is 5-8GPa, so as to obtain the diamond compact blank.
7. Machining
(1) Firstly, grinding the excircle of a diamond compact blank on a centerless grinder, and processing the excircle of the diamond compact blank to a standard size;
(2) processing the substrate end surface of the diamond compact blank to the standard requirement on a grinding machine, and processing the diamond end surface of the diamond compact blank to the standard requirement;
(3) and finally, chamfering the diamond layer and the matrix of the diamond compact blank to meet the standard requirement.
8. Quality detection
And carrying out quality detection on the processed diamond compact according to the requirements to obtain a finished product meeting the requirements.
The manufacturing method of the diamond compact of the invention introduces a proper amount of tungsten element into the polycrystalline diamond layer through the ball milling process, and ensures that the tungsten element is distributed in the polycrystalline diamond layer in a gradient way, the manufacturing process is simple to operate, and the tungsten element is distributed uniformly; the diamond composite sheet manufactured by the process of the invention not only ensures the inherent wear resistance of the diamond composite sheet, but also improves the impact resistance of the diamond composite sheet, has the characteristics of high wear resistance, good impact resistance, good thermal stability, high cutting efficiency, long service life, multiple stratum adaptation and the like, greatly reduces the tripping frequency in the drilling process, reduces the mining cost and improves the mining efficiency.
It should be noted that the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (8)
1. A method for manufacturing a polycrystalline diamond compact is characterized in that: the polycrystalline diamond compact comprises a hard alloy matrix layer (1) and a polycrystalline diamond layer (2), wherein the polycrystalline diamond layer (2) is connected to the hard alloy matrix layer (1); the polycrystalline diamond layer (2) is composed of a plurality of sub diamond layers, and each sub diamond layer contains tungsten element; the tungsten element content in each sub-diamond layer is different, so that the tungsten element in the polycrystalline diamond layer (2) is distributed in a gradient way; the content of tungsten elements in the polycrystalline diamond layer (2) far away from the hard alloy matrix layer (1) is lower than that in the polycrystalline diamond layer (2) close to the hard alloy matrix layer (1); the method comprises the following steps:
1) mixing 70-95 parts of diamond particles with the particle size of 10-40 microns, 5-30 parts of diamond particles with the particle size of 1-10 microns and 150-625 parts of hard alloy balls, dividing the mixed particles into a plurality of parts, respectively placing each part of the mixed particles in a container made of polytetrafluoroethylene, and sealing the container; the hard alloy ball is a ball body with the diameter of 2-8mm, and is made of 84-95% of tungsten carbide and 5-16% of cobalt;
2) placing each polytetrafluoroethylene container filled with the mixed particles in the step 1) on a planetary ball mill for ball milling treatment, setting ball milling rotation speed, and obtaining a plurality of batches of diamond powder after ball milling treatment according to different ball milling time;
3) respectively purifying the diamond powder subjected to ball milling treatment in each batch in the step 2);
4) sequentially putting the diamond powder with short ball milling time and the diamond powder with long ball milling time into a metal cup, then putting a hard alloy matrix on the diamond powder, and then compacting the hard alloy matrix and the diamond powder;
5) assembling the compacted hard alloy matrix, the diamond powder and the metal cup assembly in a special synthesis die for synthesizing the composite sheet to integrally form a synthesis block;
6) sintering the synthesized block in the step 5) at high temperature and high pressure to obtain a diamond compact blank;
7) processing the diamond compact blank into a standard size;
8) and carrying out quality detection on the processed diamond compact according to the requirements to obtain a finished product meeting the requirements.
2. The method of manufacturing a polycrystalline diamond compact of claim 1, wherein: the polycrystalline diamond layer (2) comprises 70-95 parts by weight of diamond particles with the particle size of 10-40 microns and 5-30 parts by weight of diamond particles with the particle size of 1-10 microns.
3. The method of manufacturing a polycrystalline diamond compact of claim 1, wherein: the content of tungsten element in the diamond sub-layer far away from the surface layer of the hard alloy matrix layer (1) is 0.5-2%, the tungsten element is from the surface layer of the polycrystalline diamond layer (2) to the inner layer, and the content of tungsten in the diamond sub-layer of the next layer is 1-4 times that of the tungsten element in the diamond sub-layer of the previous layer.
4. The method of manufacturing a polycrystalline diamond compact of claim 1, wherein: the hard alloy matrix layer (1) and the polycrystalline diamond layer (2) of the polycrystalline diamond compact integrally form a cylinder.
5. The method of manufacturing a polycrystalline diamond compact of claim 1, wherein: the ball milling treatment of the mixed particles of the diamond particles and the hard alloy balls comprises the following specific steps:
1) starting the planetary ball mill, and setting the ball milling speed at 150-;
2) taking a plurality of mixed particles consisting of diamond particles and hard alloy balls, putting each mixed particle in a polytetrafluoroethylene container, putting each polytetrafluoroethylene container filled with the mixed particles on a planetary ball mill, and starting ball milling treatment after setting different ball milling time for each mixed particle; and after the ball milling is finished, respectively taking out each part of diamond powder and each part of hard alloy ball, respectively filtering the hard alloy balls on a mesh screen, leaving the diamond powder subjected to the respective ball milling treatment, and marking for later use.
6. The method of manufacturing a polycrystalline diamond compact of claim 1, wherein: the purification treatment process comprises the following steps:
1) placing the diamond powder subjected to ball milling treatment in a sintering furnace in a hydrogen atmosphere, preserving the heat for 30-60 minutes at the temperature of 600-700 ℃, cooling to room temperature after the heat preservation is finished, and taking out the diamond powder;
2) then placing the diamond powder in a vacuum sintering furnace, and keeping the vacuum degree value not higher than 10-2And (3) keeping the temperature of 600-800 ℃ for 45-120 minutes under the condition of Pa, cooling to room temperature after the temperature is up, and taking out the diamond powder for later use.
7. The method of manufacturing a polycrystalline diamond compact of claim 1, wherein: the sintering temperature of the synthesized block in the step 6) is 1300-1700 ℃, and the pressure is 5-8 GPa.
8. The method of manufacturing a polycrystalline diamond compact of claim 1, wherein: the standard size processing procedure of the diamond compact blank comprises the following steps:
1) grinding the excircle of the diamond compact blank, and processing the excircle of the diamond compact blank to a standard size;
2) processing the end face of the hard alloy substrate layer of the diamond compact blank to a standard size;
3) processing the end face of the polycrystalline diamond layer of the diamond compact blank to a standard size;
4) and chamfering to process the polycrystalline diamond layer and the hard alloy substrate layer of the diamond compact blank to the standard size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450748.1A CN108161362B (en) | 2017-12-27 | 2017-12-27 | Polycrystalline diamond compact and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450748.1A CN108161362B (en) | 2017-12-27 | 2017-12-27 | Polycrystalline diamond compact and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108161362A CN108161362A (en) | 2018-06-15 |
| CN108161362B true CN108161362B (en) | 2020-05-08 |
Family
ID=62518860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711450748.1A Active CN108161362B (en) | 2017-12-27 | 2017-12-27 | Polycrystalline diamond compact and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108161362B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113580B (en) * | 2018-08-21 | 2020-06-23 | 立府精密机械有限公司 | Preparation process of diamond composite sheet for PDC drill bit |
| CN110094163B (en) * | 2019-05-14 | 2024-04-02 | 河南四方达超硬材料股份有限公司 | High wear-resisting polycrystalline diamond compact |
| CN110773744A (en) * | 2019-11-28 | 2020-02-11 | 中国有色桂林矿产地质研究院有限公司 | Preparation method of superhard material polycrystalline compact |
| CN111420616A (en) * | 2020-04-02 | 2020-07-17 | 广东钜鑫新材料科技股份有限公司 | Diamond compact and preparation method thereof |
| CN112282783A (en) * | 2020-11-24 | 2021-01-29 | 黄河科技学院 | Screw conveyer with diamond wearing layer |
| CN112647852B (en) * | 2020-12-25 | 2023-02-17 | 武汉新锐合金工具有限公司 | Hard alloy matrix material for polycrystalline diamond compact and application thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101773807B (en) * | 2009-12-29 | 2011-11-09 | 武汉六吉科技有限公司 | Method for preparing multifunctional polycrystalline diamond compact |
| CN101954261B (en) * | 2010-10-29 | 2012-07-04 | 郑州三和金刚石有限公司 | Method for processing drilling hexagonal polycrystalline diamond |
| CN102174877B (en) * | 2011-01-06 | 2013-09-25 | 深圳市海明润实业有限公司 | Polycrystalline diamond compact |
| CN103883257A (en) * | 2014-02-14 | 2014-06-25 | 常州大学 | Method for manufacturing boron nitride toughened polycrystalline diamond |
| CN104690274B (en) * | 2014-12-31 | 2017-11-17 | 中石化石油机械股份有限公司 | A kind of polycrystal diamond hard alloy complex sheet and preparation method thereof |
| CN104863513B (en) * | 2015-04-29 | 2017-05-17 | 富耐克超硬材料股份有限公司 | Polycrystalline diamond compact and preparation method thereof |
| CN106623946A (en) * | 2015-10-29 | 2017-05-10 | 李涛 | Method for manufacturing diamond compact |
| CN107362750B (en) * | 2017-07-24 | 2020-01-07 | 中南钻石有限公司 | Polycrystalline diamond compact and synthetic block thereof |
-
2017
- 2017-12-27 CN CN201711450748.1A patent/CN108161362B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108161362A (en) | 2018-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108161362B (en) | Polycrystalline diamond compact and manufacturing method thereof | |
| CN103831740B (en) | A kind of cermet combined binder and combined binder skive | |
| KR100963710B1 (en) | Composite Abrasive Compact | |
| CN107815580B (en) | A kind of polycrystalline cubic boron nitride/diamond composite material and preparation method thereof | |
| JP6316936B2 (en) | Carbide structure and method for producing the same | |
| CN102203374A (en) | High pressure sintering with carbon additives | |
| CN106756422B (en) | A kind of preparation method of diamond saw blade | |
| CN107362750A (en) | A kind of composite polycrystal-diamond and its Synthetic block | |
| US20030217869A1 (en) | Polycrystalline diamond cutters with enhanced impact resistance | |
| CN103028731A (en) | A hot-pressed impregnated diamond drill tooth and its manufacturing method and its application in strong abrasive formation | |
| KR20160089395A (en) | Method for preparing titanium nitride-titanium diboride-cubic boron nitride composite | |
| CN104073665B (en) | A kind of preparation method of WC-Co-cBN composite | |
| CN112500178A (en) | ZrB is generated to normal position2-SiC toughened PcBN cutter and preparation method thereof | |
| US20070009374A1 (en) | Heat-resistant composite diamond sintered product and method for production thereof | |
| CN108788140B (en) | Single crystal embedded diamond compact and preparation method thereof | |
| CN111894473B (en) | Diamond-impregnated bit for drilling hard formation with strong abrasiveness and manufacturing method thereof | |
| CN104493182A (en) | Diamond-high vanadium-titanium hard alloy polycrystalline composite chip and preparation method thereof | |
| CN102936137A (en) | A kind of Al2O3-TiC/Al2O3-TiC-CaF2 self-lubricating laminated ceramic drawing die material | |
| CN110253024B (en) | A kind of diamond composite sheet containing graphene and preparation method thereof | |
| CN108705087B (en) | Diamond composite sheet with carbon control layer | |
| CN105177389A (en) | Mining hard alloy composite ball tooth and preparing method thereof | |
| CN104175237B (en) | Rare earth modified tungstenio binder diamond emery wheel and manufacture method thereof | |
| US20220250989A1 (en) | Fabrication of downhole drilling tools | |
| CN101899713B (en) | Polycrystalline superhard material with gradient nano-micro structure and synthesis method thereof | |
| CN110773744A (en) | Preparation method of superhard material polycrystalline compact |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |