CN113250623B - Impregnated tooth with function zones, preparation method thereof and drill bit - Google Patents
Impregnated tooth with function zones, preparation method thereof and drill bit Download PDFInfo
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- CN113250623B CN113250623B CN202110527996.1A CN202110527996A CN113250623B CN 113250623 B CN113250623 B CN 113250623B CN 202110527996 A CN202110527996 A CN 202110527996A CN 113250623 B CN113250623 B CN 113250623B
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- 239000000843 powder Substances 0.000 claims abstract description 80
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 61
- 238000003466 welding Methods 0.000 claims abstract description 55
- 239000002184 metal Substances 0.000 claims abstract description 34
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 239000000314 lubricant Substances 0.000 claims abstract description 25
- 239000007787 solid Substances 0.000 claims abstract description 24
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- 238000000034 method Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 16
- 238000001513 hot isostatic pressing Methods 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 238000010146 3D printing Methods 0.000 claims description 7
- 238000005245 sintering Methods 0.000 claims description 7
- 238000001465 metallisation Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 20
- 239000000463 material Substances 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 6
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- 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
- E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/20—Post-treatment, e.g. curing, coating or polishing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- 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
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
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- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Composite Materials (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Drilling Tools (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an impregnated tooth partitioned according to functions, which comprises: the drill bit comprises a welding area and a working area which are integrally formed, wherein the welding area is welded on a drill bit steel body, the working area is divided into more than or equal to 2 parts along the axis of a pregnant inlaid tooth, N is an integer, the welding area is composed of metal powder, each part of the working area is composed of metal powder, diamonds with different parameters and solid lubricants with different volume concentrations, and the abrasive resistance of the Nth part of the working area is weaker than that of the N-1 th part; the invention also provides a preparation method of the pregnant inlaid tooth according to the functional partition. The impregnated teeth are divided into the working area and the welding area, wherein only the working area contains diamond, so that the production cost of the drill bit can be relatively reduced; the material composition of the working area contains solid lubricant material, and a layer of lubricating film can be generated on the frictional wear interface of the impregnated teeth and the drilling object in the drilling process, so that the heat generated by drilling is reduced, and the drill bit is effectively protected.
Description
Technical Field
The invention relates to the technical field of diamond bit drilling. More particularly, the invention relates to a functional partition-based impregnated tooth, a preparation method thereof and a drill bit.
Background
The existing coring bit designed for moon/space drilling uses hard alloy teeth or PDC teeth as main cutting units, and the wear-resistant materials such as diamond or CBN are only used as a strengthening mode for improving the rock breaking capacity of the bit. Research and practice show that through structural optimization design and matching with optimal drilling regulation parameters, the hard alloy drill bit and the PDC drill bit can realize the rock core drilling operation with limited footage in the earth environment, and the core drilling task requirement of the lunar soil layer is completed in the lunar environment. However, when the moon-pool drill encounters lunar rock, the frictional heat generated is significantly higher than that generated during the drilling of lunar soil layers, and once the carbide or PDC tooth drill encounters lunar rock and the cutting edge becomes dull or the cutting tooth is chipped/brittle, the high edge-out characteristics of the cutting tooth make it difficult to achieve self-sharpening, and the drilling process has to be interrupted.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
It is yet another object of the present invention to provide a functionally segmented impregnated tooth that is divided into a working region and a welding region, wherein only the working region contains diamond, thereby relatively reducing the cost of production of the drill bit; the material composition of the working area contains solid lubricant material, and a layer of lubricating film can be generated on the frictional wear interface of the impregnated teeth and the drilling object in the drilling process, so that the heat generated by drilling is reduced, and the drill bit is effectively protected.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided an impregnated tooth with functionally segmented regions, comprising: the drill bit comprises a welding area and a working area which are integrally formed, wherein the welding area is welded on a drill bit steel body, the working area is divided into N parts which are more than 2 parts along the axis of a pregnant insert, and N is an integer;
the welding area is composed of metal powder, and each part of the working area is composed of metal powder, diamonds with different parameters and solid lubricants with different volume concentrations;
the abrasion resistance of the Nth part of the working area is weaker than that of the (N-1) th part, and the 1 st part of the working area is arranged at the cutting end of the pregnant insert;
the mass parts of all substances in the metal powder of the welding area are FeCu 3080 parts, Fe 10 parts and Cu 10 parts;
the mass parts of all the substances in the metal powder of the working area are as follows: 30 parts of WC, 3060 parts of FeCu and 10 parts of Co;
the solid lubricant in the working area is nickel-coated graphite powder, and the volume concentration is 2-6%;
the diamonds of different parameters of the working area comprise: the No. 1 is 40 parts of 50-60 meshes and 60 parts of 80-100 meshes, the No. 2 is 40 parts of 40-45 meshes and 60 parts of 50-60 meshes, and the No. 3 is 20 parts of 50-60 meshes and 80-100 meshes, wherein the No. 1 and the No. 2 adopt high-grade diamonds after surface metallization, and the No. 3 adopts non-surface metallized diamonds;
The working area is divided into N =3 parts along the axis of the pregnant insert; wherein the volume concentration of the 1 st diamond in the first part of the working area is 50%, the volume concentration of the 2 nd diamond in the second part of the working area is 25%, the volume concentration of the 3 rd diamond in the third part of the working area is 5%, and the rest is metal powder in the working area and solid lubricant in the working area;
or the metal powder of the welding area is single FeCu30 powder;
the metal powder in the working area is single FeCu30 powder;
the solid lubricant in the working area is nickel-coated graphite powder, and the volume concentration is 2-6%;
the diamonds of different parameters of the working area comprise: the No. 1 is 80-100 meshes, the No. 2 is 40 parts of 30-40 meshes and 60 parts of 40-50 meshes, the No. 3 is 40-50 meshes and 60 parts of 50-60 meshes, the No. 4 is 40 parts of 60-80 meshes and 60 parts of 80-100 meshes, and the No. 5 is 80-100 meshes, wherein the No. 1 and the No. 2 are high-grade diamonds, the No. 3 is middle-grade diamonds, the No. 4 and the No. 5 are low-grade diamonds;
the working area is divided into N =5 parts along the axis of the pregnant insert; the volume concentration of the 1 st diamond in the first part of the working area is 40-60%, the volume concentration of the 2 nd diamond in the second part of the working area is 25-35%, the volume concentration of the 3 rd diamond in the third part of the working area is 15-20%, the volume concentration of the 4 th diamond in the fourth part of the working area is 5-10%, the volume concentration of the 5 th diamond in the fifth part of the working area is 3-6%, and the balance of the parts are metal powder in the working area and a solid lubricant in the working area.
The invention also provides a preparation method of the pregnant inlaid tooth according to the functional subarea, which is characterized in that the diamond-impregnated bit cutting tooth with the PDC appearance and the self-lubricating function is formed by cold press molding and hot press sintering, and then hot isostatic pressing enhancement treatment and geometric dimension correction are carried out on the diamond-impregnated bit cutting tooth to obtain the pregnant inlaid tooth with the functional subarea.
The invention also provides a preparation method of the pregnant insert according to the functional partition, which is characterized in that the impregnated diamond drill bit cutting teeth with the PDC appearance and the self-lubricating function are formed in a 3D printing mode, and then hot isostatic pressing enhancement treatment and geometric dimension correction are carried out on the impregnated diamond drill bit cutting teeth to obtain the pregnant insert of the functional partition.
The invention also provides a self-lubricating impregnated diamond drill bit, which comprises impregnated inserts partitioned according to functions.
The invention also provides a preparation method of the self-lubricating diamond-impregnated bit, and the impregnated teeth partitioned according to functions are welded on a bit steel body.
The invention at least comprises the following beneficial effects:
the impregnated teeth are designed into a working area and a welding area, wherein only the working area contains diamond, so that the production cost of the drill bit can be relatively reduced;
the material composition of the pregnant inlaid tooth working area contains solid lubricant material, and a layer of lubricating film can be generated on the frictional wear interface of the pregnant inlaid tooth and a drilling object in the drilling process, so that the heat generated by drilling is reduced, and the drill bit is effectively protected;
The impregnated teeth are processed into the shape of the PDC, and the overall strength of the impregnated teeth is enhanced by adopting a hot isostatic pressing mode, so that the impregnated teeth are drilled in a shearing and breaking mode when being drilled into a low-strength material, and a high mechanical drilling speed can be obtained; when the drill encounters a hard object, grinding and drilling with more and dense diamond particles from the No. 2 part of the working area after the No. 1 part of the impregnated tooth working area fails;
the invention adopts the manufacturing method of cold press molding, high temperature sintering and hot isostatic pressing enhancement to realize that the macroscopic mechanical property and the frictional wear property of the impregnated tooth working area along the axial direction change according to the requirement, thereby realizing self shape preservation of the impregnated tooth in the drilling process;
according to the invention, the 3D printing additive manufacturing method is adopted, so that the macroscopic mechanical property and the frictional wear property of the impregnated tooth working area in the axial direction are changed according to requirements, and the impregnated tooth is enabled to realize self shape preservation in the drilling process.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of the construction of the working and welding zones of the impregnated insert of the present invention;
Figure 2 is a cross-sectional view of the working and welding zone of the impregnated insert of the present invention.
Detailed Description
The invention provides an impregnated tooth partitioned according to functions, as shown in figures 1 and 2, comprising: the drill bit steel body is integrally formed with a welding area and a working area, the welding area is welded on the drill bit steel body, the working area is divided into more than or equal to 2 parts along the axis of the pregnant inlaid tooth, and N is an integer.
The weld zone is composed of metal powder, and each portion of the working zone is composed of metal powder, diamond of different parameters, and solid lubricant of different volume concentration.
The abrasion resistance of the Nth part of the working area is weaker than that of the (N-1) th part.
It should be noted that the welding area is divided into two parts, the welding area is in an L-shaped structure, the upper part of the working area is the welding area, and one side of the working area is also the welding area. The structure of the welding zone can be divided into two semicylindrical shapes with different lengths according to the horizontal plane, and can also be divided into a semicylindrical shape and a cylindrical shape according to the horizontal plane and the vertical plane simultaneously.
The working area can be in various shapes, and the contact interface of the working area and the welding area can be a plane, a cambered surface or a multi-segment line.
It is also noted that the diamond may be a coated diamond and the solid lubricant may be a coated lubricant.
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
It should be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials described therein are commercially available unless otherwise specified.
Example 1
The embodiment provides a preparation method of a self-lubricating diamond-impregnated bit, which comprises the following steps:
1) processing a drill bit steel body according to design requirements, and reserving a position for welding PDC-shaped impregnated inserts (namely impregnated diamond drill bit cutting teeth);
2) dividing the impregnated tooth into a working area and a welding area according to functions, dividing the working area into 3 parts along the axial direction of the impregnated tooth, and dividing the welding area into two parts, namely the welding area 1 and the welding area 2; setting the total length of a working area as L, wherein the length of the 1 st part is 1L/5, and the lengths of the 2 nd part and the 3 rd part are respectively 2L/5;
3) mechanically mixing the solid lubricant with metallized surface with metal powder of a certain formula to form powder 1 in a working area; mechanically mixing metal powder with a certain formula to form welding area powder 2; the solid lubricant in the powder material 1 is nickel-coated graphite powder, the volume concentration is 2-6%, and the mass parts of all the substances in the metal powder in the powder material 1 are as follows: 30 parts of WC, 3060 parts of FeCu and 10 parts of Co; the mass parts of all the substances in the metal powder in the powder material 2 are FeCu 3080 parts, Fe 10 parts and Cu 10 parts;
4) Corresponding to 3 parts of the pregnant inlaid tooth working area, 3 kinds of diamond with parameter proportion are respectively designed. Wherein, the No. 1 seed is 40 parts of 50-60 meshes and 60 parts of 80-100 meshes; the 2 nd seed is 40 parts of 40-45 meshes and 60 parts of 50-60 meshes; the 3 rd seed is 20 parts of 50-60 meshes and 80-100 meshes; wherein, the 1 st diamond and the 2 nd diamond adopt high-grade diamonds after surface metallization, and the 3 rd diamond adopts non-surface metallization diamonds and low-grade diamonds;
5) respectively mixing the 3 kinds of diamond obtained in the step 4) with the working area powder 1 to form working area powder 1-1, 1-2 and 1-3, wherein the volume concentration of the 1 st diamond in the working area powder 1-1 is 50%, the volume concentration of the 2 nd diamond in the working area powder 1-2 is 25%, and the volume concentration of the 3 rd diamond in the working area powder 1-3 is 5%, and respectively preparing blanks 1-1, 1-2 and 1-3 by adopting a cold press;
6) dividing the powder 2 in the welding area into 2-1 and 2-2 according to the design structure, and respectively preparing blanks 2-1 and 2-2 by adopting a cold press;
7) assembling the blanks in a graphite mold according to a design target, and performing hot-pressing sintering by adopting a resistance furnace to form the impregnated insert with the PDC appearance and the self-lubricating function;
8) Carrying out hot isostatic pressing enhancement treatment on the impregnated tooth prepared by cold press molding and hot press sintering in a protective atmosphere environment, so that the overall mechanical strength and the wear resistance of the impregnated tooth are further improved;
9) carrying out size correction on the impregnated tooth after the hot isostatic pressing treatment;
10) and (3) contacting the welding zone of the impregnated insert with the drill bit steel body, and fixing the impregnated insert on the drill bit steel body in a welding mode, thereby obtaining the impregnated diamond drill bit with self-lubricating function and PDC appearance.
Example 2
The embodiment provides a preparation method of a self-lubricating diamond-impregnated bit, which comprises the following steps:
1) processing a drill bit steel body according to design requirements, and reserving a position for welding PDC-shaped impregnated inserts (namely impregnated diamond drill bit cutting teeth);
2) dividing the impregnated tooth into a working area and a welding area according to functions, equally dividing the working area into 5 parts along the axial direction of the impregnated tooth, and dividing the welding area into 2 parts;
3) mechanically mixing the solid lubricant with metalized surface with metal powder of a certain formula to form working area powder 1, and equally dividing the working area powder into 5 parts; mechanically mixing metal powder according to a certain formula to form welding area powder 2, and dividing the welding area powder into 2 parts according to the volume occupied by the structure of the welding area; wherein the solid lubricant in the powder material 1 is nickel-coated graphite powder, and the volume concentration is 2-6%; the metal powder in the powder 1 and the powder 2 is single FeCu30 powder;
4) Corresponding to 5 parts of the pregnant and inserted tooth working area, 5 kinds of diamond with different parameters are respectively designed and arranged in different hoppers. Wherein the 1 st seed is 80-100 meshes; the 2 nd seed is 40 parts of 30-40 meshes and 60 parts of 40-50 meshes; the 3 rd seed is 40 parts of 40-50 meshes and 60 parts of 50-60 meshes; the 4 th seed is 40 parts of 60-80 meshes and 60 parts of 80-100 meshes; the 5 th seed is 80-100 meshes; wherein, the 1 st and the 2 nd diamonds are high-grade diamonds, the 3 rd diamonds are middle-grade diamonds, and the 4 th and the 5 th diamonds are low-grade diamonds;
5) mechanically mixing the working area powder 1 with the 5 kinds of diamonds in the step 4), and then preparing working area blanks 1-1, 1-2, 1-3, 1-4 and 1-5 by cold pressing equipment, wherein the volume concentration of the 1 st diamond in the working area powder 1-1 is 45%, the volume concentration of the 2 nd diamond in the working area powder 1-2 is 30%, the volume concentration of the 3 rd diamond in the working area powder 1-3 is 15%, the volume concentration of the 4 th diamond in the working area powder 1-4 is 10%, and the volume concentration of the 5 th diamond in the working area powder 1-5 is 5%; powder of a welding area is made into welding area blanks 2-1 and 2-2 according to a welding area mechanism through cold pressing equipment;
6) assembling the blanks in the working area and the blanks in the welding area into a graphite mold according to design requirements, and performing hot-pressing sintering by adopting a medium-frequency heating furnace to obtain the impregnated insert with the PDC appearance and the self-lubricating function;
7) Carrying out hot isostatic pressing enhancement treatment on the impregnated tooth prepared by cold press molding and hot press sintering in a protective atmosphere environment, so that the overall mechanical strength and the wear resistance of the impregnated tooth are further improved;
8) carrying out size correction on the cutting teeth subjected to the hot isostatic pressing treatment;
9) and fixing the corrected impregnated teeth on a drill bit steel body in a welding mode, thereby obtaining the impregnated diamond drill bit with the self-lubricating function and the PDC appearance.
Example 3
The embodiment provides a preparation method of a self-lubricating diamond-impregnated bit, which comprises the following steps:
1) processing a drill bit steel body according to design requirements, and reserving a position for welding PDC-shaped impregnated inserts (namely impregnated diamond drill bit cutting teeth);
2) the impregnated tooth is divided into a working area and a welding area according to functions, and the working area is divided into 3 parts along the axial direction of the impregnated tooth; setting the total length of a working area as L, wherein the length of the 1 st part is 1L/5, and the lengths of the 2 nd part and the 3 rd part are respectively 2L/5;
3) mechanically mixing the solid lubricant with metallized surface with metal powder of a certain formula to form powder 1 in a working area; mechanically mixing metal powder according to a certain formula to form welding area powder 2; wherein the solid lubricant in the powder material 1 is nickel-coated graphite powder, and the volume concentration is 2-6%; the mass parts of all the substances in the metal powder in the powder material 1 are 30 parts of WC, 3060 part of FeCu and 10 parts of Co; the mass parts of all the substances in the metal powder in the powder material 2 are FeCu 3080 parts, Fe 10 parts and Cu 10 parts;
4) 3 diamond with a parameter ratio is respectively designed corresponding to 3 parts of the pregnant insert working area. Wherein, the No. 1 seed is 40 parts of 50-60 meshes and 60 parts of 80-100 meshes; the second seed is 40 parts of 40-45 meshes, 60 parts of 50-60 meshes; the 3 rd material is 20 parts of 50-60 meshes and 80-100 meshes; wherein, the 1 st diamond and the 2 nd diamond adopt high-grade diamonds after surface metallization, and the 3 rd diamond adopts non-surface metallization diamonds and is low-grade diamonds;
5) respectively mixing 3 kinds of diamonds with the working area powder 1 with corresponding volume to form working area powder 1-1, 1-2 and 1-3, wherein the volume concentration of the 1 st diamond in the working area powder 1-1 is 50%, the volume concentration of the 2 nd diamond in the working area powder 1-2 is 25%, and the volume concentration of the 3 rd diamond in the working area powder 1-3 is 5%;
6) in 3D printing equipment, according to impregnated teeth design geometric parameters, forming impregnated teeth layer by layer along the axial direction of the impregnated teeth;
7) carrying out hot isostatic pressing enhancement treatment on the impregnated teeth formed by 3D printing in a protective atmosphere environment, so that the overall mechanical strength and the wear resistance of the impregnated teeth are further improved;
8) carrying out size correction on the cutting teeth subjected to the hot isostatic pressing treatment;
9) and (3) contacting the welding zone of the impregnated insert with the drill bit steel body, and fixing the impregnated insert on the drill bit steel body in a welding mode, thereby obtaining the impregnated diamond drill bit with self-lubricating function and PDC appearance.
Example 4
The embodiment provides a preparation method of a self-lubricating diamond-impregnated bit, which comprises the following steps:
1) processing a drill bit steel body according to design requirements, and reserving a position for welding PDC-shaped impregnated inserts (namely impregnated diamond drill bit cutting teeth);
2) the impregnated tooth is divided into a working area and a welding area according to functions, and the working area is equally divided into 5 parts along the axial direction of the impregnated tooth;
3) mechanically mixing the solid lubricant with metallized surface with metal powder of a certain formula to form powder 1 in a working area; mechanically mixing metal powder according to a certain formula to form welding area powder 2; wherein the solid lubricant in the powder material 1 is nickel-coated graphite powder, and the volume concentration is 2-6%; the metal powder in the powder 1 and the powder 2 is single FeCu30 powder;
4) corresponding to 5 parts of the pregnant and inserted tooth working area, 5 kinds of diamond with different parameters are respectively designed and arranged in different hoppers. Wherein the 1 st seed is 80-100 meshes; the 2 nd seed is 40 parts of 30-40 meshes and 60 parts of 40-50 meshes; the 3 rd seed is 40 parts of 40-50 meshes and 60 parts of 50-60 meshes; the 4 th seed is 40 parts of 60-80 meshes and 60 parts of 80-100 meshes; the 5 th seed is 80-100 meshes; wherein, the 1 st and the 2 nd diamonds are high-grade diamonds, the 3 rd diamonds are middle-grade diamonds, and the 4 th and the 5 th diamonds are low-grade diamonds;
5) In 3D printing equipment, forming the pregnant insert layer by layer along the axial direction of the pregnant insert according to the design parameters of the pregnant insert; the diamond volume concentration corresponding to 5 parts of the working area is respectively 40-60%, 25-35%, 15-20%, 5-10% and 3-6% by designing the spatial position of diamond particles in the working area.
6) Carrying out hot isostatic pressing enhancement treatment on the impregnated teeth formed by 3D printing in a protective atmosphere environment, so that the overall mechanical strength and the wear resistance of the impregnated teeth are further improved;
7) carrying out size correction on the cutting teeth subjected to the hot isostatic pressing treatment;
8) and fixing the corrected impregnated teeth on a drill bit steel body in a welding mode, thereby obtaining the impregnated diamond drill bit with the self-lubricating function and the PDC appearance.
While embodiments of the invention have been described above, it is not intended to be limited to the details shown, particular embodiments, but rather to those skilled in the art, and it is to be understood that the invention is capable of numerous modifications and that various changes may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (5)
1. An impregnated tooth partitioned according to functions, comprising: the drill bit comprises a welding area and a working area which are integrally formed, wherein the welding area is welded on a drill bit steel body, the working area is divided into N parts which are more than 2 parts along the axis of a pregnant insert, and N is an integer;
the welding area is composed of metal powder, and each part of the working area is composed of metal powder, diamonds with different parameters and solid lubricants with different volume concentrations;
the abrasion resistance of the Nth part of the working area is weaker than that of the (N-1) th part, and the 1 st part of the working area is arranged at the cutting end of the pregnant insert;
the mass parts of all substances in the metal powder of the welding area are FeCu 3080 parts, Fe 10 parts and Cu 10 parts;
the mass parts of all the substances in the metal powder of the working area are as follows: 30 parts of WC, 3060 parts of FeCu and 10 parts of Co;
the solid lubricant in the working area is nickel-coated graphite powder, and the volume concentration is 2-6%;
the diamonds of different parameters of the working area comprise: the No. 1 is 40 parts of 50-60 meshes and 60 parts of 80-100 meshes, the No. 2 is 40 parts of 40-45 meshes and 60 parts of 50-60 meshes, and the No. 3 is 20 parts of 50-60 meshes and 80-100 meshes, wherein the No. 1 and the No. 2 adopt high-grade diamonds after surface metallization, and the No. 3 adopts non-surface metallized diamonds;
The working area is divided into 3 parts along the axis of the pregnant insert; wherein the volume concentration of the 1 st diamond in the first part of the working area is 50%, the volume concentration of the 2 nd diamond in the second part of the working area is 25%, the volume concentration of the 3 rd diamond in the third part of the working area is 5%, and the rest is metal powder in the working area and solid lubricant in the working area;
or the metal powder of the welding area is single FeCu30 powder;
the metal powder in the working area is single FeCu30 powder;
the solid lubricant in the working area is nickel-coated graphite powder, and the volume concentration is 2-6%;
the diamonds of different parameters of the working area comprise: the No. 1 is 80-100 meshes, the No. 2 is 40 parts of 30-40 meshes and 60 parts of 40-50 meshes, the No. 3 is 40-50 meshes and 60 parts of 50-60 meshes, the No. 4 is 40 parts of 60-80 meshes and 60 parts of 80-100 meshes, and the No. 5 is 80-100 meshes, wherein the No. 1 and the No. 2 are high-grade diamonds, the No. 3 is middle-grade diamonds, the No. 4 and the No. 5 are low-grade diamonds;
the working area is divided into 5 parts along the axis of the pregnant insert; the volume concentration of the 1 st diamond in the first part of the working area is 40-60%, the volume concentration of the 2 nd diamond in the second part of the working area is 25-35%, the volume concentration of the 3 rd diamond in the third part of the working area is 15-20%, the volume concentration of the 4 th diamond in the fourth part of the working area is 5-10%, the volume concentration of the 5 th diamond in the fifth part of the working area is 3-6%, and the balance of the parts are metal powder in the working area and a solid lubricant in the working area.
2. The method of claim 1, wherein the diamond-impregnated bit cutting elements having PDC geometry and self-lubricating properties are formed by cold press molding and hot press sintering, and then subjected to hot isostatic pressing enhancement and geometric dimension modification to obtain the functionally-segmented pregnant inserts.
3. The method of claim 1, wherein the diamond-impregnated bit cutting elements having PDC geometry and self-lubricating properties are formed by 3D printing and then subjected to hot isostatic pressing and geometry modification to obtain the functionally segmented pregnant inserts.
4. A self-lubricating impregnated diamond drill bit comprising the functionally segmented impregnated insert of claim 1.
5. The method of making a self-lubricating diamond-impregnated drill bit according to claim 4, wherein the functionally segmented impregnated teeth of claim 1 are welded to a drill steel body.
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| CN201326379Y (en) * | 2009-01-23 | 2009-10-14 | 中成新星油田工程技术服务股份有限公司 | Composite gear of PDC drill bit |
| CN204609779U (en) * | 2015-05-22 | 2015-09-02 | 成都惠灵丰金刚石钻头有限公司 | A kind of nonpetroleum drill bit impregnated diamond segment cutting teeth |
| CN109014172A (en) * | 2018-07-26 | 2018-12-18 | 铜陵长江金刚石工具有限责任公司 | A kind of diamond bit and its manufacturing method |
| CN110056313A (en) * | 2018-01-18 | 2019-07-26 | 中石化石油工程技术服务有限公司 | The impregnated diamond composite block of PDC- |
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| US6592985B2 (en) * | 2000-09-20 | 2003-07-15 | Camco International (Uk) Limited | Polycrystalline diamond partially depleted of catalyzing material |
| US7350601B2 (en) * | 2005-01-25 | 2008-04-01 | Smith International, Inc. | Cutting elements formed from ultra hard materials having an enhanced construction |
| US7497280B2 (en) * | 2005-01-27 | 2009-03-03 | Baker Hughes Incorporated | Abrasive-impregnated cutting structure having anisotropic wear resistance and drag bit including same |
| CN108119065B (en) * | 2017-11-13 | 2020-03-10 | 中国石油天然气股份有限公司 | Diamond-impregnated bit cutting tooth and manufacturing method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201326379Y (en) * | 2009-01-23 | 2009-10-14 | 中成新星油田工程技术服务股份有限公司 | Composite gear of PDC drill bit |
| CN204609779U (en) * | 2015-05-22 | 2015-09-02 | 成都惠灵丰金刚石钻头有限公司 | A kind of nonpetroleum drill bit impregnated diamond segment cutting teeth |
| CN110056313A (en) * | 2018-01-18 | 2019-07-26 | 中石化石油工程技术服务有限公司 | The impregnated diamond composite block of PDC- |
| CN109014172A (en) * | 2018-07-26 | 2018-12-18 | 铜陵长江金刚石工具有限责任公司 | A kind of diamond bit and its manufacturing method |
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