CN110656333B - Cobalt removing device for diamond compact - Google Patents
Cobalt removing device for diamond compact Download PDFInfo
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- CN110656333B CN110656333B CN201910958625.1A CN201910958625A CN110656333B CN 110656333 B CN110656333 B CN 110656333B CN 201910958625 A CN201910958625 A CN 201910958625A CN 110656333 B CN110656333 B CN 110656333B
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- 229910017052 cobalt Inorganic materials 0.000 title claims abstract description 179
- 239000010941 cobalt Substances 0.000 title claims abstract description 179
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title claims abstract description 178
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 71
- 239000010432 diamond Substances 0.000 title claims abstract description 71
- 239000002131 composite material Substances 0.000 claims abstract description 111
- 239000007788 liquid Substances 0.000 claims abstract description 50
- 239000000956 alloy Substances 0.000 claims abstract description 30
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 30
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 20
- 230000007797 corrosion Effects 0.000 abstract description 14
- 238000005260 corrosion Methods 0.000 abstract description 14
- 238000013461 design Methods 0.000 abstract description 2
- 239000012466 permeate Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 49
- 238000000034 method Methods 0.000 description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 9
- 239000002253 acid Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001868 cobalt Chemical class 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- 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
- C23F1/08—Apparatus, e.g. for photomechanical printing surfaces
-
- 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
- C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
Abstract
The application discloses diamond compact cobalt removing device, including the solution groove, the medial surface in solution groove is provided with the fixture that spanes the solution groove, is fixed with lower extreme open-ended cobalt removing mould on the fixture, and the internal surface of cobalt removing mould forms interference fit with the diamond compact that the composite bed is located the lower part, and the fixture can make the composite bed of diamond compact submergence in the cobalt removing liquid in the solution groove alone. According to the cobalt removing device for the diamond composite sheet, the cobalt removing effect of different design requirements can be guaranteed according to cobalt removing time and the height of the composite layer entering cobalt removing liquid, the cobalt removing liquid can be guaranteed not to permeate into the gap between the inner hole of the cobalt removing die block and the excircle of the composite sheet any more to cause corrosion of the outer part of the hard alloy of the composite sheet, and the situation of corrosion of the hard alloy of the composite sheet caused by too deep cobalt removing depth of the side surface of the composite sheet can be avoided under the condition that the cobalt removing composite sheet is not taken out timely.
Description
Technical Field
The invention relates to the technical field of diamond compacts, in particular to a cobalt removing device for a diamond compact.
Background
Polycrystalline Diamond Compact (PDC) is synthesized by diamond micro powder and a hard alloy matrix in a high-temperature high-pressure (HTHP) environment, the shape of the polycrystalline diamond compact is a cylindrical structure, the polycrystalline diamond compact is generally cylindrical, a composite layer of the polycrystalline diamond compact also has other shapes such as conical shape, arc shape, ridge shape and the like, has good wear resistance, impact toughness and thermal stability, and is widely applied to the fields of petroleum and geological drilling, machining tools, correction tools and the like.
In the manufacturing process of the conventional Polycrystalline Diamond Compact (PDC), in order to improve the synthesis efficiency of the compact, metals such as iron, cobalt, nickel and the like are required to be used as catalysts and binders in the composite layer of the diamond compact in the synthesis process, but in the use process of the diamond compact, the thermal expansion coefficient and the elastic modulus of the residual metals are greatly different from those of the diamond, so that the composite layer of the compact can be cracked, layered and the like, the abrasion resistance and the thermal stability of the diamond compact are rapidly reduced, the compact is invalid in the use process, and the service life of the diamond compact is greatly shortened, so that the residual metals in the composite layer of the common diamond compact are removed before the use of the diamond compact to form a cobalt-removing layer with a certain height and a certain shape, and the cobalt-removing shape which is better in feedback in the market at present is annular cobalt-removing, particularly, the cobalt-removing depth of the side surface is larger than the cobalt-removing depth of the middle part of the compact, and the cobalt-removing layer can be provided in a mode of greatly improving the volume of the annular cobalt-removing in the use process.
The most common method for removing cobalt from a composite sheet at present is to make the residual metal in the composite layer of the composite sheet and the cobalt removing liquid react chemically, in general, the cobalt removing liquid is a mixed strong acid, in particular, the composite sheet is put into a cobalt removing mould block to be protected, only one surface of the composite layer is exposed outside, the side surface of the composite layer is wrapped to prevent the side surface from being exposed in the cobalt removing liquid, then the whole cobalt removing mould block with the composite sheet is immersed in the cobalt removing liquid, the cobalt removing liquid gradually permeates into the composite layer along with the continuous contact and reaction of the residual metal on the surface layer of the composite layer, the cobalt removing layer can form a cobalt removing layer with a certain height and a certain shape after cobalt removing for a certain time, the cobalt removing layer has no residual metal, and the cobalt removing layer position has the best use effect in the use process of the composite layer of the composite sheet. In order to reduce the cobalt removal time, the cobalt removal liquid is heated to a certain temperature generally, and ultrasonic vibration is assisted to accelerate the reaction speed of metal and the cobalt removal liquid, so that the cobalt removal efficiency is improved, and the cobalt removal mode has the advantages of simple operation, low cost and higher cobalt removal efficiency, but has some defects: firstly, in the cobalt removal process, the whole cobalt removal mould block is in cobalt removal liquid, and the inner hole of the cobalt removal mould block and the outer circle of the composite sheet are designed to be in interference fit, but the inner hole of the cobalt removal mould block gradually expands along with the temperature rise and vibration of the cobalt removal liquid, so that the gap between the inner hole of the cobalt removal mould block and the outer circle of the composite layer is enlarged, the cobalt removal liquid flows into the hard alloy part along the gap, and the hard alloy matrix of the composite sheet can be corroded; secondly, along with the continuous infiltration of the composite layer cobalt removal liquid of the composite sheet, when the cobalt removal composite sheet is taken out untimely, the cobalt removal liquid can be led to directly infiltrate into the hard alloy matrix part, so that the hard alloy matrix is corroded, the bonding strength of the composite layer of the composite sheet and the hard alloy is reduced due to the corrosion of a light point, the composite sheet is subjected to delamination phenomenon in the use process, and the composite sheet is directly scrapped due to serious corrosion, particularly in the annular cobalt removal mode, because the cobalt removal depth of the side surface of the composite layer is deeper than that of the middle position, the corrosion probability of the hard alloy matrix of the composite sheet is higher in the cobalt removal process.
Therefore, how to form a better annular decolouring shape in the current chemical decolouring mode, effectively avoid the corrosion of a hard alloy matrix caused by too deep decolouring depth of the annular decolouring side surface due to untimely taking out of a composite sheet, and simultaneously avoid the alloy corrosion caused by the fact that the gap between the inner hole of the decolouring die block and the outer circle of the composite layer is greatly influenced by external conditions, and the problems to be solved are urgent.
Disclosure of Invention
In order to solve the technical problems, the invention provides the cobalt removing device for the diamond composite sheet, which can ensure a better cobalt removing shape by adjusting the placing time and the height of the composite layer entering the cobalt removing liquid, meanwhile, the cobalt removing liquid does not infiltrate into a gap between an inner hole of a cobalt removing die block and the excircle of the composite sheet to cause corrosion of the outer part of the hard alloy of the composite sheet, and the situation of corrosion of the hard alloy matrix of the composite sheet caused by too deep cobalt removing depth of the side surface of the composite layer can not occur under the condition that the cobalt removing composite sheet is not taken out timely.
The invention provides a cobalt removing device for a diamond composite sheet, which comprises a solution tank, wherein a fixture crossing the solution tank is arranged on the inner side surface of the solution tank, a cobalt removing die with an opening at the lower end is fixed on the fixture, the inner surface of the cobalt removing die and the diamond composite sheet with a composite layer positioned at the lower part form interference fit, and the fixture can independently enable the composite layer of the diamond composite sheet to be immersed into cobalt removing liquid in the solution tank.
Preferably, in the cobalt removing device for a diamond compact, the height of the inner cavity of the cobalt removing die for placing the diamond compact is larger than the height of the excircle alloy part of the diamond compact.
Preferably, in the cobalt removing device for a diamond compact, scale marks for indicating the placing height of the fixture are arranged in the height direction of the solution tank.
Preferably, in the cobalt removing device for a diamond compact, the fixture can move up and down along the inner side surface of the solution tank.
Preferably, in the cobalt removing device for a diamond compact, the cobalt removing mold is a polymer plastic block mold.
Preferably, in the cobalt removing device for a diamond compact, the shape of the fixture is a long strip shape.
Preferably, in the cobalt removing device for a diamond compact, the fixture is connected with the cobalt removing die in an interference fit manner.
Preferably, in the cobalt removing device for a diamond compact, the cross section of the cobalt removing die is circular or rectangular.
According to the technical scheme, in the cobalt removing device of the diamond composite sheet, as the clamp which spans the solution tank is arranged on the inner side surface of the solution tank, the cobalt removing die with the opening at the lower end is fixed on the clamp, the inner surface of the cobalt removing die and the diamond composite sheet with the composite layer positioned at the lower part form interference fit, and the clamp can independently enable the composite layer of the diamond composite sheet to be immersed into cobalt removing liquid in the solution tank, when cobalt removing is carried out, on one hand, the cobalt removing grinding tool block is not immersed into cobalt removing solution, the protection of the cobalt removing grinding tool block on the composite sheet is not influenced by the temperature and vibration of the cobalt removing solution, the interference fit between the inner diameter of the cobalt removing die block and the composite sheet is ensured, the inner diameter of the cobalt removing die block and the gap between the composite sheet are not required to be corroded, on the other hand, as long as the height relation between the composite layer and the cobalt removing liquid is regulated, the height in the whole cobalt removing process is not changed, the periphery of the composite sheet and the cobalt removing liquid can be immersed into the cobalt removing liquid, the composite layer can be uniformly formed on the side surface through the contact with the cobalt removing liquid, the periphery of the composite sheet and the cobalt removing layer can be uniformly formed on the side surface, the side surface is not required to be in the cobalt removing shape, and the cobalt removing depth is required to be fixed, and the cobalt removing depth is required to be the cobalt removing, and the composite layer can be in the middle shape is not be in the middle.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front cross-sectional view of a diamond compact cobalt removal device provided herein;
FIG. 2 is a schematic diagram of a conventional cobalt removal effect using existing equipment;
FIG. 3 is a schematic diagram showing a first loop-off effect performed by the apparatus according to the present embodiment;
fig. 4 is a schematic diagram of a second type of ring-off effect performed by the apparatus according to the present embodiment.
Detailed Description
The core of the invention is to provide a cobalt removing device for a diamond compact, which can ensure the ring removing effect of different design requirements according to cobalt removing time and the height of a composite layer entering cobalt removing liquid, can ensure that the cobalt removing liquid does not infiltrate into the gap between the inner hole of a cobalt removing mould block and the excircle of the compact to cause corrosion of the exterior of the compact hard alloy, and can not cause corrosion of the compact hard alloy due to infiltration of the cobalt removing liquid into the hard alloy matrix of the compact under the condition that the cobalt removing compact is not taken out timely.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of a diamond compact cobalt removal device that this application provided is shown in fig. 1, fig. 1 shows the front view section of a diamond compact cobalt removal device that this application provided, the device includes solution groove 4, the inside and outside parcel of this solution groove 4 has acid-resistant macromolecular material in order to guarantee that solution groove 4 is not corroded, pack into in this solution groove 4 and remove cobalt liquid 5, the degree of depth of packing into and remove cobalt liquid 5 can be adjusted according to the needs of cobalt height, the medial surface of solution groove 4 is provided with fixture 3 that spanned solution groove 4, the specific shape of fixture 3 is unlimited, and its connected mode with solution groove 4 is unlimited, as long as can fix can, be fixed with the cobalt removal mould 1 of lower extreme opening on fixture 3, this cobalt removal mould 1 is similar to a cup of back-off for holding diamond compact 2, and the inner surface of cobalt removal mould 1 and the diamond compact 2 that the composite layer is located the lower part form interference fit, so that both can be relatively static, diamond compact 2 just can not slide down in cobalt removal liquid 5 under the action of gravity, can not be limited in the cobalt removal liquid 5 alone after removing cobalt, can be in addition, can be in the mode that the diamond compact 5 is difficult to take out the solution 1, can be in the solution 2 is difficult to take out to the mixture ratio, and can be in the diamond compact hydrochloric acid removal device is not limited, and the hydrochloric acid can be used to remove the cobalt compact 2 is completely, the whole, the solution can be completely removed, the cobalt compact is different from the cobalt compact has been completely, the solution is difficult to be used to remove, and the solution is difficult to be mixed, and is difficult to remove and has been completely has been mixed, and is easy to be used to the solution in the solution is easy to be used to remove and has had a hydrochloric acid and has been mixed, and has been completely has been used and has been used in the a hydrochloric acid and has been used and has a hydrochloric acid and has a cobalt acid and has high acid and has a has high acid and a has a cobalt removal device.
In actual operation, pouring a certain volume of cobalt-removing liquid 5 into a solution tank 4, fixing a cobalt-removing die 1 to a certain height by adopting a fixture 3, enabling a composite layer of a diamond composite sheet 2 to be in contact with the cobalt-removing liquid 5 independently, placing the composite layer with a corresponding height into the cobalt-removing liquid 5 by the side surface of the composite layer, and finally, taking the cobalt-removing depth as the height of the composite layer entering the cobalt-removing liquid, wherein the upper surface of the cobalt-removing liquid 5 cannot be higher than the lower part of the cobalt-removing die 1, and in the whole cobalt-removing process, since the cobalt-removing die 1 is not in the cobalt-removing liquid 5 with a certain temperature, the interference fit between the cobalt-removing die 1 and the excircle of the composite sheet is very stable and safe, the cobalt-removing liquid 5 cannot be in contact with the hard alloy part of the composite sheet, in addition, the composite sheet is placed upside down, the maximum penetration height of the cobalt-removing liquid 5 cannot exceed the height of the composite layer entering the cobalt-removing liquid of the composite sheet in the infiltration process of the composite sheet and the excircle part of the composite sheet, and no matter how long time, and the maximum cobalt-removing depth of the cobalt-removing is fixed.
According to the technical scheme, in the embodiment of the cobalt removing device for the diamond composite sheet, as the clamp crossing the solution groove is arranged on the inner side surface of the solution groove, the cobalt removing die with the lower end open is fixed on the clamp, the inner surface of the cobalt removing die and the diamond composite sheet with the composite layer positioned at the lower part form interference fit, the clamp can independently enable the composite layer of the diamond composite sheet to be immersed into cobalt removing liquid in the solution groove, so that the cobalt removing height can be adjusted to be corresponding according to actual needs, the effect of annular cobalt removing is achieved, good cobalt removing shape can be ensured by adjusting the placing time and the height of the composite layer entering the cobalt removing liquid, in addition, the height cannot be changed in the whole cobalt removing process, even if the diamond composite sheet is not taken out timely, the hard alloy cannot be corroded, and therefore the situation that the inner hole of the cobalt removing die block cannot infiltrate into the cobalt removing liquid and the gap of the outer circle of the composite sheet causes corrosion of the hard alloy can not occur, and the hard alloy matrix of the cobalt removing liquid permeated into the composite sheet cannot occur under the condition that the hard alloy of the cobalt removing composite sheet is corroded.
In a specific embodiment of the cobalt removing device for the diamond composite sheet, the height of the inner cavity of the cobalt removing die 1 for placing the diamond composite sheet 2 is larger than the height of the excircle alloy part of the diamond composite sheet 2, so that the excircle alloy part of the diamond composite sheet 2 can be ensured to completely enter the cobalt removing die 1, and the excircle alloy part is protected and cannot be corroded by cobalt removing solution.
In another embodiment of the cobalt removing device for the diamond compact, the scale marks for indicating the placement height of the fixture 3 are arranged on the height direction of the solution tank 4, so that the operation of containing cobalt removing liquid is more convenient, the height of the added cobalt removing liquid can be determined according to the required cobalt removing depth, and the cobalt removing device is only a preferable scheme, and in other cases, the scale marks can be omitted.
In still another embodiment of the cobalt removing device for diamond composite sheets, the fixture 3 can move up and down along the inner side surface of the solution tank 4, in this case, when cobalt removing is performed by replacing different diamond composite sheets, cobalt removing liquid can be kept unchanged, the diamond composite sheets with different lengths are placed at different heights to determine suitable cobalt removing positions, of course, the specific setting mode is not limited, the method can be similar to the combination of a grate and a steamer of steamed bread, and a plurality of annular ribs protruding inwards or annular pits recessed outwards at different heights are arranged on the inner side surface of the solution tank 4, so that the fixture 3 can be fixed at a plurality of positions.
The cobalt removing die 1 is a high-molecular plastic block die, belongs to various mixed materials of polytetrafluoroethylene and polyethylene, has better acid resistance effect, and ensures that the cobalt removing die cannot be corroded.
Alternatively, the shape of the fixture 3 is a long strip, and a plurality of cobalt removing dies can be arranged on each fixture 3 in parallel, which can be selected according to actual needs, and of course, the long strip is only a preferred scheme, and can also be selected to be square or other shapes according to actual needs, which is not limited herein.
In another preferred embodiment, the fixture 3 and the cobalt removing die 1 are connected in an interference fit manner, so that stable connection of the fixture and the cobalt removing die is ensured, and the cobalt removing die is convenient to take out and is beneficial to efficient operation.
It will be appreciated by those skilled in the art that the cross-sectional shape of the decobalting die 1 may be circular or rectangular, depending on the shape of the diamond compact in which the decobalting is to be performed.
In summary, the above-mentioned diamond compact cobalt removal device is utilized in the cobalt removal process, can guarantee that alloy position is not corroded, place through the inversion of compact and set up the compact's composite sheet and immerse the high of cobalt removal liquid, can reach better cobalt removal effect, realize the purpose that the ring was taken off, can satisfy the demand of market to different cobalt removal degree of depth, and cobalt removal effect is stable, and, the compact that needs the compact side cobalt removal degree of depth of compact in the market as far as possible at present, the consistent requirement of the cobalt removal degree of depth of compact side and middle cobalt removal degree of depth both can be realized, also can adjust the cobalt removal time and realize that the compact side cobalt removal degree of depth is greater than middle cobalt removal degree of depth, in addition, the device easy operation, and the security is good, cobalt removal efficiency is high, cobalt removal layer form is good, the wearability and the thermal stability of the diamond compact that the cobalt removal comes out are better.
The effect of ring-off by the above-described diamond compact cobalt-removing device will be described below with a specific example:
(1) 10000 Henan crystal sharp new material Co., ltd R11-1613DT products are selected, the specific product information is that the outer diameter is 15.88 (+ -0.03) mm, the height is 13.20 (+ -0.05) mm, the chamfer angle of the composite layer is 0.38 (+ -0.04) mm, the chamfer angle of the alloy is 0.70 (+ -0.05) mm, the height of the composite layer is 2.1 (+ -0.2) mm, the cobalt removal depth of the middle position is required to be not less than 400 microns, and the side cobalt removal depth is not less than 1200 microns;
(2) Pressing the composite sheet into a cobalt-removing grinding tool block in batches, and setting the exposed height of the composite layer of the composite sheet in the cobalt-removing die block to be 1.4mm to 1.5mm;
(3) Injecting cobalt-removing solution into a solution tank, ensuring that the height of the cobalt-removing solution in the solution tank is not lower than 30mm, regulating the position of a clamp, ensuring that the exposed part of a composite sheet in a cobalt-removing die block is completely immersed in the cobalt-removing solution, ensuring that the cobalt-removing die block is not immersed in the cobalt-removing solution, ensuring that the acid temperature of the solution is 50 (+/-3) DEG C through a temperature control system, and replacing the cobalt-removing solution once every 5 days by using an ultrasonic vibration system as an auxiliary material;
(4) After 3 days, 5 days and 10 days, the polycrystalline diamond compact is subjected to selective examination, the selective examination proportion is 10%, the hard alloy of the polycrystalline diamond compact does not have corrosion phenomenon, the polycrystalline diamond compact is taken out after 10 days to meet the cobalt removal depth requirement, the compact is subjected to full examination, and the corrosion phenomenon of the hard alloy is not found;
(5) According to the custom requirements, the final cobalt removal effect is shown in fig. 2, 3 and 4, an X-RAY detector is adopted, the cobalt removal shape and the cobalt removal depth can be directly tested, fig. 2 is a schematic diagram of conventional cobalt removal effect by using the existing equipment, any side surface is not exposed in cobalt removal liquid, the conventional cobalt removal only requires that the cobalt removal depth at the middle position reaches 400 micrometers, some requirements reach 500 micrometers, and particularly in fig. 2, the upper part of the composite sheet is the side surface, the middle part at the right side is the middle position, and the lengths of all the parts can be seen as follows: the location 201 is 411.8 microns, the location 202 is 840.3 microns, the location 203 is 588.2 microns, the location 204 is 495.8 microns, the location 202 is the side decolonization depth, the location 204 is the middle decolonization depth, it is seen that this basically meets the requirement of the conventional decolonization depth, the conventional decolonization mode does not require the side decolonization depth of the composite layer, fig. 3 is a schematic diagram of the first ring decolonization effect performed by the apparatus provided by the embodiment, in this case, the height of the side of the composite layer exposed from the decolonization mold of the apparatus, that is, the height of the side exposed in the decolonization liquid is 1.3mm to 1.4mm, the decolonization time is the same as the conventional decolonization time, the ring decolonization effect seen in fig. 3 is that the middle decolonization depth is not less than 400 microns, the side decolonization depth is not less than 1200 microns, the specific numerical value is 453.0 microns, the location 302 is 1461.5 microns, the site 303 was 692.3 micrometers, the site 304 was 547.0 micrometers, the site 302 was the side decoobalt depth, the site 304 was the middle decoobalt depth, and it can be seen that the purpose of the ring-off was achieved, fig. 4 is a schematic diagram of the second ring-off effect by using the apparatus provided in this example, the decoobalt time was increased by 5 days from the conventional decoobalt time, the exposed height of the side of the composite layer from the decoobalt mold of the apparatus, i.e., the exposed height of the side in the decoobalt solution was 1.6mm to 1.7mm, the ring-off effect as can be seen in fig. 4 was the effect that can be achieved by adjusting the decoobalt time and the height of the composite layer immersed in the decoobalt solution, i.e., the middle position decoobalt depth was 700 micrometers, the side decoobalt depth was 1700 micrometers, the lengths of the respective sites in fig. 4 were as follows, the site 401 was 538.5 micrometers, the site 402 was 1700.9 micrometers, and the site 403 was 957.3 micrometers, the part 404 is 794.9 micrometers, the part 402 is the side decobalting depth, the part 404 is the middle decobalting depth, the purpose of ring decobalting is achieved, the decobalting effect can improve the thermal stability of the product, and the use effect of customers is good.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The cobalt removing device for the diamond composite sheet is characterized by comprising a solution tank, wherein a fixture crossing the solution tank is arranged on the inner side surface of the solution tank, a cobalt removing die with an opening at the lower end is fixed on the fixture, the inner surface of the cobalt removing die and the diamond composite sheet with a composite layer positioned at the lower part form interference fit, and the fixture can independently enable the composite layer of the diamond composite sheet to be immersed into cobalt removing liquid in the solution tank;
the cobalt-removing die is a high-molecular plastic block die.
2. The apparatus of claim 1, wherein the height of the cavity of the decobalting mold for placing the diamond compact is greater than the height of the outer circular alloy portion of the diamond compact.
3. The apparatus of claim 1, wherein the solution tank has graduation marks in a height direction for indicating a height of the jig.
4. The apparatus of claim 1, wherein the fixture is movable up and down along an inner side of the solution tank.
5. The apparatus according to any one of claims 1 to 4, wherein the jig is in the shape of an elongated bar.
6. The apparatus according to any one of claims 1-4, wherein the fixture is in interference fit connection with the cobalt removal die.
7. The apparatus according to any one of claims 1 to 4, wherein the cross-sectional shape of the decobalting die is circular or rectangular.
Priority Applications (1)
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| CN114871436B (en) * | 2022-03-29 | 2023-01-10 | 武汉锐特金刚石有限公司 | Cobalt removing device for polycrystalline diamond compact and cobalt removing method using cobalt removing device |
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| CN206624651U (en) * | 2017-03-21 | 2017-11-10 | 郑州嘉晨化工科技有限公司 | A kind of composite polycrystal-diamond leaching device |
| CN110270488A (en) * | 2018-03-16 | 2019-09-24 | 深圳先进技术研究院 | Clamping device and pretreating device |
| CN212713755U (en) * | 2019-10-10 | 2021-03-16 | 河南晶锐新材料股份有限公司 | Cobalt removing device for diamond composite sheet |
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| GB201223523D0 (en) * | 2012-12-31 | 2013-02-13 | Element Six Abrasives Sa | A support structure for a body of polycrystalline diamond material during processing |
| AR096578A1 (en) * | 2013-06-11 | 2016-01-20 | Ulterra Drilling Tech Lp | PCD ELEMENTS AND PROCESS TO ELABORATE THEM |
| WO2015006696A1 (en) * | 2013-07-12 | 2015-01-15 | Smith International, Inc. | Cutter protection during leaching process |
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| CN206624651U (en) * | 2017-03-21 | 2017-11-10 | 郑州嘉晨化工科技有限公司 | A kind of composite polycrystal-diamond leaching device |
| CN110270488A (en) * | 2018-03-16 | 2019-09-24 | 深圳先进技术研究院 | Clamping device and pretreating device |
| CN212713755U (en) * | 2019-10-10 | 2021-03-16 | 河南晶锐新材料股份有限公司 | Cobalt removing device for diamond composite sheet |
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