CN116287853A - Method for preparing drill bit tail guide sleeve by utilizing hot isostatic pressing near net forming - Google Patents
Method for preparing drill bit tail guide sleeve by utilizing hot isostatic pressing near net forming Download PDFInfo
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- CN116287853A CN116287853A CN202310387363.4A CN202310387363A CN116287853A CN 116287853 A CN116287853 A CN 116287853A CN 202310387363 A CN202310387363 A CN 202310387363A CN 116287853 A CN116287853 A CN 116287853A
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000001513 hot isostatic pressing Methods 0.000 title claims abstract description 36
- 239000000956 alloy Substances 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000005516 engineering process Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000007872 degassing Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 41
- 229910045601 alloy Inorganic materials 0.000 claims description 32
- 229910000978 Pb alloy Inorganic materials 0.000 claims description 18
- 238000011049 filling Methods 0.000 claims description 17
- 238000005245 sintering Methods 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 10
- 238000003754 machining Methods 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000010146 3D printing Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000007639 printing Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910000881 Cu alloy Inorganic materials 0.000 abstract description 5
- 239000004615 ingredient Substances 0.000 abstract 1
- 238000011068 loading method Methods 0.000 abstract 1
- 238000005242 forging Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/02—Alloys based on copper with tin as the next major constituent
-
- 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
- B22F3/03—Press-moulding apparatus therefor
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention belongs to the technical field of copper alloy materials of drill bit tail guide sleeves, and particularly relates to a method for preparing a drill bit tail guide sleeve by utilizing hot isostatic pressing near net forming, wherein the copper alloy comprises the following components in percentage by weight: sn:7.0wt% to 9.5wt%, P:0.1wt% to 0.40wt%, pb:0.1wt% to 0.5wt%, cu: the balance. The preparation process of the copper alloy comprises the following steps: mixing the ingredients, manufacturing a sheath die, loading, degassing, sealing, HIP, removing the sheath, heat treatment, local finishing and obtaining the finished guide sleeve. The invention prepares the Cu-Sn-P-Pb-drill shank guide sleeve by using the hot isostatic pressing technology, thereby improving the material production and processing utilization rate of guide sleeve type transmission parts. Meanwhile, the rapid heating mode of the hot isostatic pressing process can refine grains, so that the mechanical property of the copper alloy is improved.
Description
Technical Field
The invention belongs to the technical field of copper alloy materials of drill bit tail guide sleeves, and particularly relates to a method for preparing a drill bit tail guide sleeve by utilizing hot isostatic pressing near net forming.
Background
Hydraulic rock drills play a very important role in rock drilling projects. The drill shank guide sleeve is used as an important part in the mechanical transmission of the hydraulic rock drill, and plays a role in guiding in the movement process of the drill shank. The drill shank guide sleeve is a high-precision transmission part, and is manufactured by a casting molding process, but the guide sleeve manufactured by the traditional process is uneven in internal structure and more in defects, so that the yield of the guide sleeve is not high. In recent years, more and more part manufacturers adopt a forging forming process to prepare the drill shank guide sleeve, but the process has low material utilization rate and relatively high production cost. Moreover, the existing hot working processes such as energy conservation and environmental protection are greatly promoted, and the forging and the like have adverse effects on the environment, so that the production cost is continuously increased.
The Hot Isostatic Pressing (HIP) process enables direct powder forming, which can produce near net-shape parts that do not require substantial additional processing. The blank similar to the final product in shape can be made, so that the material utilization rate is 80-90% and is improved by about 20% compared with that of the conventional forging process, and the machining efficiency is obviously improved and the cost is reduced. In particular to the processing of tubular guide sleeve products with complex structures.
Disclosure of Invention
The invention provides a method for preparing a drill bit guide sleeve by utilizing hot isostatic pressing near net forming, which prepares a Cu-Sn-P-Pb-drill bit guide sleeve.
The technical scheme adopted for solving the technical problems is as follows: a method for preparing a drill bit guide sleeve by utilizing hot isostatic pressing near net shaping comprises the following steps:
step S1, batching and mixing powder:
the weight percentages are as follows: sn:7.0wt% to 9.5wt%, P:0.1wt% to 0.40wt%, pb:0.1wt% to 0.5wt%, cu: the balance is mixed with the powder to obtain Cu-Sn-P-Pb alloy powder;
s2, manufacturing a sheath die:
manufacturing a corresponding sheath die according to the size and shape of the drill shank guide sleeve to be manufactured;
step S3, charging:
filling the prepared Cu-Sn-P-Pb alloy powder into the sheath die manufactured in the step S2;
step S4, degassing and sealing:
placing the sheath die filled with the alloy powder into deaerated equipment, vacuumizing to 10 < -5 > Pa, heating and preserving heat, and sealing;
step S5, hot Isostatic Pressing (HIP) sintering:
placing the sealed sheath die into a furnace chamber of hot isostatic pressing, and performing hot isostatic pressing sintering by taking Ar argon as a gas pressure transmission medium;
step S6, removing the sheath die:
removing the compact Cu-Sn-P-Pb alloy after hot isostatic pressing sintering from the sheath die to obtain a Cu-Sn-P-Pb guide sleeve;
step S7, heat treatment:
and (3) taking nitrogen as a protective atmosphere for the Cu-Sn-P-Pb guide sleeve obtained in the step (S6), and performing aging treatment: preserving the temperature at 380 ℃ for 4 hours;
step S8, local finishing
And carrying out local finish machining on the Cu-Sn-P-Pb guide sleeve subjected to heat treatment by machining to obtain the Cu-Sn-P-Pb drill bit tail guide sleeve with the required size.
As a further preferred aspect of the present invention, in step S2, the preparation method of the sheathing mold includes: the Q235 steel is used as a base material, two sleeves are manufactured firstly, one surface of each sleeve is welded, and the other surface is sealed after powder is filled.
As a further preferred aspect of the present invention, in step S2, the preparation method of the sheathing mold includes: according to the size and shape of the drill shank guide sleeve to be prepared, a three-dimensional model of the sheath is designed by utilizing three-dimensional modeling software; the material of the sheath comprises the following components in percentage by weight: 1-3% of WC ceramic powder and the balance of stainless steel powder; and directly printing out the sheath model by using a 3D printing technology, performing high-temperature sintering treatment, and then spraying an interface protection material on the surface of the sintered sheath model to obtain the sheath.
As a further preferred aspect of the present invention, the interface protective material is a graphite coating.
As a further preferable mode of the invention, in the step S2, the spraying number of times of spraying the interface protection material is 2-3 times, and the spraying thickness is 0.3-0.6mm.
As a further preferable mode of the invention, the charging method in the step S3 is that 75% -85% of Cu-Sn-P-Pb alloy powder is firstly taken for vacuum smelting, and alloy blocks with the length and width of 5-8mm and the height of 4-6mm are prepared by pouring; filling the prepared alloy blocks into a sheath in a layer-by-layer stacking manner, wherein the filling rate of the alloy blocks is 75% -85%, filling the residual Cu-Sn-P-Pb alloy powder into gaps between adjacent alloy blocks and gaps between the alloy blocks and the sheath, and filling the Cu-Sn-P-Pb alloy powder into the gaps between the adjacent alloy blocks and gaps between the alloy blocks and the sheath to 15% -25%.
As a further preferable mode of the invention, the temperature of the vacuum melting is 1100-1300 ℃, the time is 4-6h, and the vacuum degree is-0.2 MPa.
As a further preferred aspect of the present invention, in step S4, the heating and heat-preserving treatment specifically includes: heating to 400-600 deg.C, and maintaining for 6-10 hr.
As a further preferred aspect of the present invention, in step S5, the hot isostatic pressing process is: the pressure is 100-120MPa, the heat preservation time is 0.5-2h, and the sintering temperature is 900-1050 ℃.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
compared with the conventional casting process, the Cu-Sn-P-Pb high-performance drill shank guide sleeve has the advantages of improved yield, fewer internal defects and higher material density; compared with the forging process, the high production cost generated by the forging process is saved, and part of environmental pollution is also reduced. Meanwhile, the utilization rate of the material is improved by about 20% by adopting a near net forming means.
The preparation method of the sheath die has the advantages of convenient operation, simple process, easily obtained materials and low manufacturing cost; moreover, the sheath die prepared by the 3D printing process has good compactness and stable performance, and the interface protection material sprayed on the surface of the sheath die is beneficial to the separation of the later-stage guide sleeve part and the sheath die and avoids adhesion.
The powder filling method for firstly smelting the alloy powder, preparing the alloy square and then mixing the alloy square with the alloy powder can reduce the shrinkage caused by hot isostatic pressing and the deformation of the sheath, thereby reducing the risk of cracking of the sheath.
Description of the embodiments
In the description of the present invention, it should be understood that the terms "left," "right," "upper," "lower," and the like indicate an orientation or a positional relationship, and are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and that "first," "second," etc. do not represent the importance of the components, and thus are not to be construed as limiting the present invention. The specific dimensions adopted in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.
Examples
The present example provides a preferred embodiment, a method for preparing a drill shank guide sleeve using hot isostatic pressing near net shape forming, comprising the steps of:
step S1, batching and mixing powder:
the weight percentages are as follows: sn:7.0wt% to 9.5wt%, P:0.1wt% to 0.40wt%, pb:0.1wt% to 0.5wt%, cu: the balance is mixed with the powder to obtain Cu-Sn-P-Pb alloy powder;
s2, manufacturing a sheath die:
manufacturing a corresponding sheath die according to the size and shape of the drill shank guide sleeve to be manufactured;
specifically, the sheath mold has two preparation methods, namely, Q235 steel is adopted as a base material, two sleeves are manufactured firstly, one surfaces of the two sleeves are welded, and the other surfaces are sealed after powder is filled. Secondly, designing a three-dimensional model of the sheath by utilizing three-dimensional modeling software according to the size and shape of the drill shank guide sleeve to be prepared; the material of the sheath comprises the following components in percentage by weight: 1-3% of WC ceramic powder and the balance of stainless steel powder; and directly printing a sheath model by using a 3D printing technology, performing high-temperature sintering treatment at 2000-3000 ℃, and then spraying an interface protection material on the surface of the sintered sheath model by using a physical vapor deposition technology (PVD method) to obtain the sheath. Preferably, the interface protection material is a graphite coating. The spraying times of the interface protection material are 2-3 times, and the spraying thickness is 0.3-0.6mm. The preparation method of the sheath die is convenient and fast to operate, simple in process, easy to obtain materials and low in manufacturing cost. Moreover, the sheath die prepared by the 3D printing process has good compactness and stable performance, and the interface protection material sprayed on the surface of the sheath die is beneficial to the separation of the later-stage guide sleeve part and the sheath die and avoids adhesion.
Step S3, charging:
filling the prepared Cu-Sn-P-Pb alloy powder into the sheath die manufactured in the step S2;
the charging method comprises the steps of firstly taking 75% -85% of Cu-Sn-P-Pb alloy powder for vacuum melting, and pouring to obtain an alloy square block with the length and width of 5-8mm and the height of 4-6 mm; filling the prepared alloy blocks into a sheath in a layer-by-layer stacking manner, wherein the filling rate of the alloy blocks is 75% -85%, filling the residual Cu-Sn-P-Pb alloy powder into gaps between adjacent alloy blocks and gaps between the alloy blocks and the sheath, and filling the Cu-Sn-P-Pb alloy powder into the gaps between the adjacent alloy blocks and gaps between the alloy blocks and the sheath to 15% -25%. Preferably, the temperature of the vacuum melting is 1100-1300 ℃, the time is 4-6h, and the vacuum degree is-0.2 MPa. According to the powder filling method, the alloy powder is firstly smelted and made into the alloy square block and then mixed with the alloy powder, so that the shrinkage caused by hot isostatic pressing can be reduced, the deformation of the sheath can be reduced, and the risk of cracking of the sheath can be reduced.
Step S4, degassing and sealing:
placing the sheath die filled with the alloy powder into deaerated equipment, vacuumizing to 10 < -5 > Pa, heating and preserving heat, and sealing; the heating and heat preservation treatment specifically comprises the following steps: heating to 400-600 deg.C, and maintaining for 6-10 hr.
Step S5, hot isostatic pressing sintering:
placing the sealed sheath die into a furnace chamber of hot isostatic pressing, and performing hot isostatic pressing sintering by taking Ar argon as a gas pressure transmission medium; the hot isostatic pressing process comprises the following steps: the pressure is 100-120MPa, the heat preservation time is 0.5-2h, and the sintering temperature is 900-1050 ℃. If the pressure is less than 100MPa, the elimination of pores is not facilitated, and if the pressure is more than 120MPa, larger stress can be generated, micro cracks are generated, and the densification of the material is not facilitated under the two conditions. The heat preservation time exceeds 2 hours, and the grain size of the material is oversized, so that the performance of the material is deteriorated. The heat preservation time is less than 0.5h, which can lead the alloy powder to react insufficiently, have more defects and pores and influence the performance of the material.
Step S6, removing the sheath die:
removing the compact Cu-Sn-P-Pb alloy after HIP sintering from the sheath die to obtain a Cu-Sn-P-Pb guide sleeve;
step S7, heat treatment:
and (3) taking nitrogen as a protective atmosphere for the Cu-Sn-P-Pb guide sleeve obtained in the step (S6), and performing aging treatment: preserving the temperature at 380 ℃ for 4 hours;
step S8, local finishing
And carrying out local finish machining on the Cu-Sn-P-Pb guide sleeve subjected to heat treatment by machining to obtain the Cu-Sn-P-Pb drill bit tail guide sleeve with the required size.
Compared with the conventional casting process, the Cu-Sn-P-Pb high-performance drill shank guide sleeve of the embodiment has the advantages of improved yield, less internal defects and higher material density; compared with the forging process, the high production cost generated by the forging process is saved, and part of environmental pollution is also reduced. Meanwhile, the utilization rate of the material is improved by about 20% by adopting a near net forming means.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" as referred to in this application means that each exists alone or both.
As used herein, "connected" means either a direct connection between elements or an indirect connection between elements via other elements.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (9)
1. A method for preparing a drill bit guide sleeve by utilizing hot isostatic pressing near net forming, which is characterized by comprising the following steps:
step S1, batching and mixing powder:
the weight percentages are as follows: sn:7.0wt% to 9.5wt%, P:0.1wt% to 0.40wt%, pb:0.1wt% to 0.5wt%, cu: the balance is mixed with the powder to obtain Cu-Sn-P-Pb alloy powder;
s2, manufacturing a sheath die:
manufacturing a corresponding sheath die according to the size and shape of the drill shank guide sleeve to be manufactured;
step S3, charging:
filling the prepared Cu-Sn-P-Pb alloy powder into the sheath die manufactured in the step S2;
step S4, degassing and sealing:
placing the sheath die filled with the alloy powder into deaerated equipment, vacuumizing to 10 < -5 > Pa, heating and preserving heat, and sealing;
step S5, hot isostatic pressing sintering:
placing the sealed sheath die into a furnace chamber of hot isostatic pressing, and performing hot isostatic pressing sintering by taking Ar argon as a gas pressure transmission medium;
step S6, removing the sheath die:
removing the compact Cu-Sn-P-Pb alloy after hot isostatic pressing sintering from the sheath die to obtain a Cu-Sn-P-Pb guide sleeve;
step S7, heat treatment:
and (3) taking nitrogen as a protective atmosphere for the Cu-Sn-P-Pb guide sleeve obtained in the step (S6), and performing aging treatment: preserving the temperature at 380 ℃ for 4 hours;
step S8, local finishing
And carrying out local finish machining on the Cu-Sn-P-Pb guide sleeve subjected to heat treatment by machining to obtain the Cu-Sn-P-Pb drill bit tail guide sleeve with the required size.
2. The method for preparing the drill bit guide sleeve by utilizing hot isostatic pressing near net shape forming according to claim 1, wherein the method comprises the following steps: in step S2, the preparation method of the sheath mold includes: the Q235 steel is used as a base material, two sleeves are manufactured firstly, one surface of each sleeve is welded, and the other surface is sealed after powder is filled.
3. A method of preparing a drill bit guide sleeve using hot isostatic pressing near net shape forming as defined in claim 1, wherein: in step S2, the preparation method of the sheath mold includes: according to the size and shape of the drill shank guide sleeve to be prepared, a three-dimensional model of the sheath is designed by utilizing three-dimensional modeling software; the material of the sheath comprises the following components in percentage by weight: 1-3% of WC ceramic powder and the balance of stainless steel powder; and directly printing out the sheath model by using a 3D printing technology, performing high-temperature sintering treatment, and then spraying an interface protection material on the surface of the sintered sheath model to obtain the sheath.
4. A method of preparing a drill bit guide by hot isostatic pressing near net shape forming according to claim 3, wherein: the interface protection material is a graphite coating.
5. A method of preparing a drill bit guide by hot isostatic pressing near net shape forming according to claim 3, wherein: in the step S2, the spraying times of the interface protection material are 2-3 times, and the spraying thickness is 0.3-0.6mm.
6. A method of preparing a drill bit guide sleeve using hot isostatic pressing near net shape forming as defined in claim 1, wherein: the charging method of the step S3 comprises the steps of firstly taking 75% -85% of Cu-Sn-P-Pb alloy powder for vacuum melting, and pouring to obtain alloy square blocks with the length and width of 5-8mm and the height of 4-6 mm; filling the prepared alloy blocks into a sheath in a layer-by-layer stacking manner, wherein the filling rate of the alloy blocks is 75% -85%, filling the residual Cu-Sn-P-Pb alloy powder into gaps between adjacent alloy blocks and gaps between the alloy blocks and the sheath, and filling the Cu-Sn-P-Pb alloy powder into the gaps between the adjacent alloy blocks and gaps between the alloy blocks and the sheath to 15% -25%.
7. A method of preparing a drill bit guide sleeve using hot isostatic pressing near net shape forming as defined in claim 6, wherein: the vacuum melting temperature is 1100-1300 ℃, the time is 4-6h, and the vacuum degree is-0.2 MPa.
8. A method of preparing a drill bit guide sleeve using hot isostatic pressing near net shape forming as defined in claim 1, wherein: in step S4, the heating and heat preservation process specifically includes: heating to 400-600 deg.C, and maintaining for 6-10 hr.
9. A method of making a Cu-Sn-P-Pb drill guide sleeve using near net shape hot isostatic pressing as defined in claim 1, wherein: in step S5, the hot isostatic pressing process is: the pressure is 100-120MPa, the heat preservation time is 0.5-2h, and the sintering temperature is 900-1050 ℃.
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| CN202310387363.4A CN116287853B (en) | 2023-04-12 | 2023-04-12 | Method for preparing drill bit tail guide sleeve by utilizing hot isostatic pressing near net forming |
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| CN202310387363.4A CN116287853B (en) | 2023-04-12 | 2023-04-12 | Method for preparing drill bit tail guide sleeve by utilizing hot isostatic pressing near net forming |
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