CN115628014A - Cobalt element distribution controllable diamond compact and preparation method thereof - Google Patents
Cobalt element distribution controllable diamond compact and preparation method thereof Download PDFInfo
- Publication number
- CN115628014A CN115628014A CN202211459454.6A CN202211459454A CN115628014A CN 115628014 A CN115628014 A CN 115628014A CN 202211459454 A CN202211459454 A CN 202211459454A CN 115628014 A CN115628014 A CN 115628014A
- Authority
- CN
- China
- Prior art keywords
- diamond
- cobalt
- layer
- micro powder
- controllable
- 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.)
- Pending
Links
- 239000010432 diamond Substances 0.000 title claims abstract description 99
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 95
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000009826 distribution Methods 0.000 title claims abstract description 24
- 229910017052 cobalt Inorganic materials 0.000 title claims abstract description 23
- 239000010941 cobalt Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims description 12
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000843 powder Substances 0.000 claims abstract description 40
- 239000000956 alloy Substances 0.000 claims abstract description 36
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 36
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 238000005245 sintering Methods 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 49
- 239000002184 metal Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 238000000227 grinding Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000002386 leaching Methods 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 5
- 238000003786 synthesis reaction Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims 2
- 239000011230 binding agent Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 229910052903 pyrophyllite Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/06—Melting-down metal, e.g. metal particles, in the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Metallurgy (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a diamond compact with controllable cobalt element distribution, which comprises a diamond layer and an alloy layer; the diamond layer is formed by alternately pressing and sintering diamond micro powder and cobalt foil, and the alloy layer is made of hard alloy. The controllable distribution of the cobalt element can realize that completely different performance parameters can be obtained at different parts of the same diamond compact, thereby meeting the requirements of different parts on wear resistance and impact resistance in use.
Description
Technical Field
The invention relates to the technical field of preparation of diamond compacts, in particular to a cobalt element distribution-controllable diamond compact and a preparation method thereof.
Background
The diamond composite sheet is used as a main stress part in the drilling process and is mainly used in the fields of geological exploration, coal field exploitation, petroleum and natural gas excavation and the like. The diamond compact (PDC) is generally cylindrical, is divided into an upper layer and a lower layer, is a superhard material synthesized by polycrystalline diamond and WC — Co hard alloy at high temperature and high pressure, and has wear resistance and high hardness of diamond, high toughness, high thermal conductivity and good welding wettability of the hard alloy.
In the diamond composite sheet, the hard alloy contains Co element for regulating the hardness and impact resistance of the hard alloy and raising the combining strength between the hard alloy and the diamond layer.
The polycrystalline diamond layer is formed by pressing diamond micro powder and a metal binder, wherein the most commonly used element of the metal binder is cobalt (Co) element, the Co element is used as a catalyst between the diamond micro powder in the synthesis process of the metal binder, and a large amount of expansion cracks are caused between the diamonds due to the large difference of the thermal expansion coefficients of the Co element and the diamonds during the use, so that the failure of the diamonds is accelerated; on the other hand, co can accelerate the graphitization of the diamond at high temperature, and further reduces the service performance of the diamond.
The existing common practice in the industry is to reduce the content of Co in the diamond layer of the synthesized product by performing acid leaching on the surface of the synthesized semi-finished diamond layer.
Disclosure of Invention
In view of the above, the present invention provides a diamond compact with controllable cobalt distribution, so that cobalt can be distributed at different positions as required, thereby prolonging the service life of the diamond compact; a method of making a diamond compact is also provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a diamond compact with controllable cobalt element distribution comprises a diamond layer and an alloy layer; the diamond layer is formed by alternately pressing and sintering diamond micro powder and cobalt foil, and the alloy layer is made of hard alloy.
The cobalt foil replaces the existing cobalt powder to serve as a cobalt source, and a mode that multiple layers of cobalt foils and multiple layers of diamonds are alternately distributed is adopted, so that the controllable distribution of Co element in the diamond layer is realized, the content of cobalt in the diamond micropowder layer is reduced, the performance of the diamond compact is improved, and the service life of the diamond compact is prolonged.
A preparation method of a diamond compact with controllable cobalt element distribution comprises the following steps:
(1) Preparation of the Diamond layer
a. Uniformly mixing diamond micro powder with different particle sizes according to a proportion;
b. putting the uniformly mixed diamond micro powder into a metal cup die according to the set thickness of the surface layer, and then flattening the surface of the powder by using the die to be vertical to the external surface;
c. putting the cobalt foil with the set thickness into a metal cup, and lightly pressing the cobalt foil to be tightly attached to the diamond micro powder below the cobalt foil;
d. alternately putting the diamond micro powder and the cobalt foil into a metal cup die according to the designed layer thickness, and accumulating the micro powder or slightly pressing the cobalt foil before putting the micro powder and the cobalt foil until the target thickness is reached, wherein the cobalt foil is arranged on the uppermost layer;
(2) Preparation of Diamond compact Green body
a. Placing one end of the alloy matrix after acid leaching treatment into a metal cup mold, and lightly pressing the alloy to make the alloy tightly contact with the cobalt foil;
b. putting the combination body into a vacuum furnace for deoxidation treatment, and then continuously assembling a shaping mold outside the combination body to form a synthetic block;
c. the combination is synthesized into a blank sheet in a synthesis block at high temperature and high pressure;
(3) Synthetic diamond compact
And grinding, cylindrical grinding and flat grinding chamfering the blank sheet to obtain the diamond compact with controllable Co element distribution.
Preferably, the granularity of the diamond micro powder consists of one or more granularity distribution intervals, the granularity range is 1 to 40 mu m, and the thickness of the single diamond micro powder layer is 0.1 to 0.5mm. The thickness can meet the using effect of the cobalt foil, and the layering phenomenon between the diamond micropowder layer and the cobalt foil is avoided.
Preferably, the thickness of the cobalt foil is 0.03-0.2mm, and the number of adjacent cobalt foil layers between the diamond micro powder layers is 1~3. The thickness range can ensure that the cobalt foil is completely melted at high temperature and high pressure and realizes effective diffusion among particles.
Preferably, one surface of the hard alloy, which is in contact with the diamond layer, is a plane and is perpendicular to the outer circular surface of the hard alloy.
Preferably, before the cobalt foil is filled in each time, the surface of the diamond micro powder layer at the lower layer needs to be flattened, so that the flattened surface is perpendicular to the excircle of the metal cup.
Preferably, the hard alloy needs to be subjected to acid leaching treatment before use, the soaking time is 2 to 12h, and the excircle of the hard alloy does not contact with an acid liquid. Cobalt reduction treatment can be performed on the alloy.
The invention has the beneficial effects that:
the controllable distribution of the Co element can realize that completely different performance parameters can be obtained at different parts of the same diamond compact, thereby meeting the requirements of different parts on wear resistance and impact resistance in use.
The cobalt foil can reduce the content of Co element in the surface layer of the diamond compact and reduce the hardness of the diamond compact in synthesis, thereby reducing the difficulty of grinding the surface layer in processing, improving the processing efficiency and reducing the processing cost.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
A diamond compact with controllable cobalt element distribution comprises a diamond layer and an alloy layer; the diamond layer is formed by alternately pressing and sintering diamond micro powder and cobalt foil, and the alloy layer is made of hard alloy.
Example 2
A preparation method of a diamond compact with controllable cobalt element distribution comprises the following steps:
(1) Preparation of the Diamond layer
a. Uniformly mixing diamond micro powder with the particle sizes of 3 microns, 15 microns and 25 microns according to the part ratio of 2; the granularity of the diamond micro powder is composed of one or more granularity distribution intervals, the granularity range is 1 to 40 mu m, and the thickness of the single diamond micro powder layer is 0.1 to 0.5mm;
b. putting the uniformly mixed diamond micro powder into a metal cup die according to the set thickness of the surface layer, and then flattening the surface of the powder by using the die to be vertical to the external support surface;
c. putting the cobalt foil with the set thickness into a metal cup, and lightly pressing the cobalt foil to be tightly attached to the diamond micro powder below the cobalt foil; the thickness of the cobalt foil is 0.03 to 0.2mm, and the number of layers of the cobalt foil between adjacent diamond micro powder layers is 1~3; before the cobalt foil is loaded into the metal cup, the surface of the diamond micro powder layer at the lower layer needs to be flattened, so that the flattened surface is vertical to the excircle of the metal cup;
d. alternately putting the diamond micro powder and the cobalt foil into a metal cup mould according to the designed layer thickness, and accumulating the micro powder or slightly pressing the cobalt foil before putting the micro powder and the cobalt foil each time until the target thickness is reached, wherein the cobalt foil is arranged on the uppermost layer;
(2) Preparation of Diamond compact Green body
a. Before use, the alloy matrix needs to be subjected to acid leaching for 2 to 12h, the outer circle of the hard alloy does not contact with acid liquor, one end of the soaked alloy is placed into a metal cup die, and the alloy is lightly pressed to be in close contact with the cobalt foil; one surface of the hard alloy, which is in contact with the diamond layer, is a plane and is vertical to the excircle surface of the plane;
b. putting the combination into a vacuum furnace for deoxidation treatment, and then continuously assembling a shaping mold outside the combination to form a synthetic block; the shaping mold mainly comprises a NaCl outer sleeve, a graphite heating tube, a pyrophyllite pressure-transmitting block and upper and lower sealing pieces;
c. the combination is synthesized into a blank sheet in a synthesis block at high temperature and high pressure;
(3) Synthetic diamond compact
And grinding, cylindrical grinding and flat grinding and chamfering the blank sheet to obtain the diamond compact with controllable Co element distribution.
Taking a product with the diameter of 15.88mm as an example, grinding a 0.3mm degraded layer on the surface of a traditional product, wherein the weight of a single chip is 3-5 kg, 25-40 carats/chip is needed when 70-80 granularity diamond micro powder is used, and the same process only needs 10-20 carats/chip for the product prepared by the method of the example 2.
Because the distribution of Co element is relatively controllable, the abrasion ratio of the original diamond compact is 30 to 50 multiplied by 104, and the impact resistance work is less than 1500J; the diamond compact prepared by the embodiment has the wear ratio of 80 to 160 multiplied by 104 and the impact work is more than 2500J.
Through the improvement, the service life is prolonged by 15 to 40 percent compared with the original service life, so that the tripping times in the drilling process are reduced, and the drilling efficiency is improved by 10 to 25 percent.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. A diamond compact with controllable cobalt element distribution is characterized by comprising a diamond layer and an alloy layer; the diamond layer is formed by alternately pressing and sintering diamond micro powder and cobalt foil, and the alloy layer is made of hard alloy.
2. The method for preparing the diamond compact with the controllable cobalt element distribution as claimed in claim 1, characterized by comprising the following steps:
(1) Preparation of the Diamond layer
a. Uniformly mixing diamond micro powder with different particle sizes according to a proportion;
b. putting the uniformly mixed diamond micro powder into a metal cup die according to the set thickness of the surface layer, and then flattening the surface of the powder by using the die to be vertical to the external surface;
c. putting the cobalt foil with the set thickness into a metal cup, and lightly pressing the cobalt foil to be tightly attached to the diamond micro powder below the cobalt foil;
d. alternately putting the diamond micro powder and the cobalt foil into a metal cup die according to the designed layer thickness, and accumulating the micro powder or slightly pressing the cobalt foil before putting the micro powder and the cobalt foil until the target thickness is reached, wherein the cobalt foil is arranged on the uppermost layer;
(2) Preparation of Diamond compact Green body
a. Placing one end of the alloy matrix subjected to acid leaching treatment into a metal cup mold, and slightly pressing the alloy to make the alloy tightly contact with the cobalt foil;
b. putting the combination into a vacuum furnace for deoxidation treatment, and then continuously assembling a shaping mold outside the combination to form a synthetic block;
c. the combination is synthesized into a blank sheet in a synthesis block at high temperature and high pressure;
(3) Synthetic diamond compact
And grinding, cylindrical grinding and flat grinding chamfering the blank sheet to obtain the diamond compact with controllable Co element distribution.
3. The method for preparing the diamond compact with the controllable cobalt element distribution according to claim 2, wherein the granularity of the diamond micro powder is composed of one or more granularity distribution intervals, the granularity range is 1-40 μm, and the thickness of the single diamond micro powder layer is 0.1-0.5 mm.
4. The method for preparing the diamond compact sheet with the controllable cobalt element distribution according to claim 2, wherein the thickness of the cobalt foil is 0.03 to 0.2mm, and the number of layers of the cobalt foil between adjacent diamond micro powder layers is 1~3.
5. The method for preparing a diamond compact with controllable cobalt element distribution according to claim 2, wherein one surface of the hard alloy in contact with the diamond layer is a plane and is perpendicular to the outer circumferential surface of the plane.
6. The method for preparing the cobalt element distribution-controllable diamond compact according to claim 2, wherein before the cobalt foil is loaded, the surface of the diamond micro powder layer at the lower layer needs to be flattened, so that the flattened surface is perpendicular to the outer circle of the metal cup.
7. The method for preparing the diamond compact with the controllable cobalt element distribution according to claim 2, wherein the hard alloy is subjected to acid dipping treatment before use, the dipping time is 2 to 12h, and the excircle of the hard alloy is not contacted with an acid solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211459454.6A CN115628014A (en) | 2022-11-16 | 2022-11-16 | Cobalt element distribution controllable diamond compact and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211459454.6A CN115628014A (en) | 2022-11-16 | 2022-11-16 | Cobalt element distribution controllable diamond compact and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115628014A true CN115628014A (en) | 2023-01-20 |
Family
ID=84909796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211459454.6A Pending CN115628014A (en) | 2022-11-16 | 2022-11-16 | Cobalt element distribution controllable diamond compact and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115628014A (en) |
-
2022
- 2022-11-16 CN CN202211459454.6A patent/CN115628014A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101285371B (en) | Fabrication technology of diamond positioning and arrangement impregnated rock bit | |
| CN109694977B (en) | Impregnated diamond and preparation method thereof, impregnated drill bit and preparation method thereof | |
| CN109530680B (en) | Thermal-stable high-wear-resistance polycrystalline diamond compact and preparation method thereof | |
| CN104879066B (en) | Diamond compact substrate preparation method and composite sheet matrix are used in probing | |
| CN108788140B (en) | Single crystal embedded diamond compact and preparation method thereof | |
| CN111318710A (en) | Preparation method of high-holding-force diamond-inlaid tool | |
| CN101824968A (en) | Novel brazed impregnated diamond bit | |
| CN113976892A (en) | Manufacturing method of low-residual-stress polycrystalline diamond compact | |
| CN111266573B (en) | Preparation method of polycrystalline cubic boron nitride composite sheet | |
| CN115628014A (en) | Cobalt element distribution controllable diamond compact and preparation method thereof | |
| GB2409467A (en) | Method of producing a wear resistant mechanical component | |
| CN107598174B (en) | Integral sintered polycrystalline diamond ball tooth and preparation method thereof | |
| CN114515833B (en) | Polycrystalline diamond compact with functionally graded structure and preparation method thereof | |
| CN111250711B (en) | One-step forming preparation method of titanium carbonitride base metal ceramic stirring head | |
| CN105156038B (en) | Rock bit gradient composites carbide button and its processing method | |
| CN107812950B (en) | The method that thin diamond wall jacking grooved bit monoblock type bores tooth is prepared using pressureless sintering method | |
| CN111822715B (en) | High-wear-resistance diamond-impregnated bit matrix material and method for manufacturing diamond bit by using same | |
| CN110173218B (en) | Preformed melt-impregnated diamond-impregnated drill bit and preparation method thereof | |
| CN100446912C (en) | Technology for making diamond composite sheet drill bit body by hot press method and drill bit body | |
| CN219986419U (en) | Cemented carbide support body and superhard cutter | |
| CN114922900B (en) | High-temperature wear-resistant bearing and preparation method thereof | |
| CN110449593B (en) | Steel-bonded hard alloy head for manufacturing coal cutting pick and preparation method thereof | |
| CN115255368B (en) | Diamond tool with soft and hard composite metal binding agent and preparation method thereof | |
| CN212549445U (en) | Compound piece apparatus for producing of PCBN | |
| CN115433847B (en) | Polycrystalline diamond and preparation method thereof, polycrystalline diamond composite material and preparation method thereof |
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 |