CN113909440A - Preparation method of porous high-temperature alloy thin-wall circular tube casting - Google Patents
Preparation method of porous high-temperature alloy thin-wall circular tube casting Download PDFInfo
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- CN113909440A CN113909440A CN202111191289.6A CN202111191289A CN113909440A CN 113909440 A CN113909440 A CN 113909440A CN 202111191289 A CN202111191289 A CN 202111191289A CN 113909440 A CN113909440 A CN 113909440A
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- 238000005266 casting Methods 0.000 title claims abstract description 108
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 48
- 239000000956 alloy Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000007581 slurry coating method Methods 0.000 claims abstract description 15
- 238000007598 dipping method Methods 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 239000013078 crystal Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 26
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000003754 machining Methods 0.000 abstract description 5
- 229910000601 superalloy Inorganic materials 0.000 description 26
- 238000010438 heat treatment Methods 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000012670 alkaline solution Substances 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000005495 investment casting Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Continuous Casting (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention provides a preparation method of a porous high-temperature alloy thin-wall round tube casting, and relates to the technical field of high-temperature alloys. The invention provides a preparation method of a porous high-temperature alloy thin-wall circular tube casting, which comprises the following steps: wrapping the core in a wax mold to obtain an intermediate wax mold; the surface of the core is provided with a bulge penetrating through the wax mould; the shape and the size of the wax mould are consistent with those of a target porous high-temperature alloy thin-wall circular tube casting; dipping the intermediate wax pattern with a slurry coating, and dewaxing to obtain a casting mold; and casting the high-temperature alloy melt into the casting mold to obtain the porous high-temperature alloy thin-wall circular tube casting. The invention can form the thin-wall round pipe with holes in one step, not only can solve the problem of stress concentration caused by machining holes, but also can prevent a remelted layer from being generated near the holes of the prepared high-temperature alloy thin-wall round pipe casting with holes, thereby ensuring the integrity of the structure.
Description
Technical Field
The invention relates to the technical field of high-temperature alloys, in particular to a preparation method of a porous high-temperature alloy thin-wall circular tube casting.
Background
With the continuous improvement of the working temperature of the turbine of the aeroengine, the inner cavity structure of the turbine blade is increasingly complex, and higher requirements are put forward on the high-temperature alloy air-cooled turbine blade. Due to the structural design, the turbine blade is required to have very thin walls, even the thinnest point is less than 0.5mm, and the resulting thin wall effect is also of great concern.
To further study the effect of the superalloy thin-wall effect on the blade, studies were initiated by preparing relevant thin-wall specimens. When the thin-wall relation between a film hole and a coating is researched, a thin-wall circular tube with a hole is generally adopted as a sample for research, the film hole on the side surface of the circular tube is generally manufactured by subsequent machining by simulating a preparation process of a blade, but stress can be generated around the hole during machining, and a remelted layer is easily formed around the hole due to high temperature of the machine, so that the integral tissue structure of the sample is damaged.
Disclosure of Invention
The invention provides a preparation method of a porous superalloy thin-wall circular pipe casting, the porous thin-wall circular pipe casting prepared by the method is closer to the state of a blade thin wall with an air film hole, the porous thin-wall circular pipe casting can be formed at one time, the problem of stress concentration caused by machining holes can be solved, and a remelted layer cannot be generated near the holes of the prepared porous superalloy thin-wall circular pipe casting, so that the completeness of the structure is ensured.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of a porous high-temperature alloy thin-wall round pipe casting, which comprises the following steps:
wrapping the core in a wax mold to obtain an intermediate wax mold; the surface of the core is provided with a bulge penetrating through the wax mould; the shape and the size of the wax mould are consistent with those of a target porous high-temperature alloy thin-wall circular tube casting;
dipping the intermediate wax pattern with a slurry coating, and dewaxing to obtain a casting mold;
and casting the high-temperature alloy melt into the casting mold to obtain the porous high-temperature alloy thin-wall circular tube casting.
Preferably, the angle of the projection of the core surface to the side surface of the wax pattern is greater than 0 ° and less than 180 °.
Preferably, the mass content of the alumina in the core is more than or equal to 99 percent.
Preferably, the thickness of the wax mould is 0.4-3 mm.
Preferably, the top of the intermediate body wax mold is fixedly connected with the bracket.
Preferably, after obtaining the intermediate wax mold, the method further comprises: and connecting the bottom of the intermediate wax mold with a crystal selector-amplifier assembly to obtain the investment mold assembly.
Preferably, the amplifier in the crystal selector-amplifier assembly is connected with the bottom of the intermediate wax mold; the material of the crystal selector-amplifier assembly is wax.
Preferably, before the slurry coating, the method further comprises: assembling the intermediate wax pattern onto a runner.
Preferably, before the casting, the method further comprises: preheating the casting mould; the preheating temperature is 800 ℃, and the heat preservation time is 1-20 min.
Preferably, the casting temperature is 1300-1560 ℃, and the drawing speed is 1-5 mm/min.
The invention provides a preparation method of a porous high-temperature alloy thin-wall round pipe casting, which comprises the following steps: wrapping the core in a wax mold to obtain an intermediate wax mold; the surface of the core is provided with a bulge penetrating through the wax mould; the shape and the size of the wax mould are consistent with those of a target porous high-temperature alloy thin-wall circular tube casting; dipping the intermediate wax pattern with a slurry coating, and dewaxing to obtain a casting mold; and casting the high-temperature alloy melt into the casting mold to obtain the porous high-temperature alloy thin-wall circular tube casting. The preparation method provided by the invention can be used for integrally forming the holed high-temperature alloy thin-wall circular pipe casting without allowance by casting, and compared with the holed thin-wall circular pipe fitting which is generally prepared by machining, cutting, drilling and other modes, the holed thin-wall circular pipe fitting prepared by the invention is closer to the state of the blade thin wall with the air film hole.
Drawings
FIG. 1 is a sectional view of a core in example 1;
FIG. 2 is a sectional view of an intermediate wax pattern of example 1;
FIG. 3 is a schematic view of a casting system for a thin-walled circular tube casting of single crystal superalloy with a hole according to example 1;
FIG. 4 is a physical diagram of a casting of a thin-walled single-crystal superalloy thin-walled circular tube with a hole according to example 1;
FIG. 5 is a microstructure diagram of a casting of a thin-walled circular tube of a single-crystal superalloy with a hole according to example 1;
FIG. 6 is a sectional view of a core in embodiment 2;
FIG. 7 is a schematic view of a casting system for a thin-walled circular tube casting of the superalloy with holes of example 2;
FIG. 8 is a drawing of a physical representation of a cast of the apertured superalloy thin-walled circular tube of example 2;
FIG. 9 is a microstructure diagram of a cast of a thin-walled circular tube made of a superalloy with holes according to example 2;
the dimensions in fig. 1, 2 and 6 are in mm;
in fig. 3 and 7, 1 is a core, 2 is a wax mold, 3 is a shell, 4 is an amplifier, 5 is a spiral crystal selector, 6 is a support, and 7 is a superalloy melt.
Detailed Description
The invention provides a preparation method of a porous high-temperature alloy thin-wall round pipe casting, which comprises the following steps:
wrapping the core in a wax mold to obtain an intermediate wax mold; the surface of the core is provided with a bulge penetrating through the wax mould; the shape and the size of the wax mould are consistent with those of a target porous high-temperature alloy thin-wall circular tube casting;
dipping the intermediate wax pattern with a slurry coating, and dewaxing to obtain a casting mold;
and casting the high-temperature alloy melt into the casting mold to obtain the porous high-temperature alloy thin-wall circular tube casting.
According to the invention, the core is wrapped in the wax mould to obtain the intermediate wax mould. In the present invention, the mass content of alumina in the core is preferably 99% or more. In the present invention, the core is preferably cylindrical. In the invention, the diameter of the core is the same as the inner diameter of the target porous superalloy thin-wall round tube casting.
In the present invention, the surface of the core is provided with a protrusion penetrating through the wax pattern. In the present invention, the angle of the projection with the side surface of the wax pattern is preferably greater than 0 ° and less than 180 °, more preferably 90 °. In the invention, the angle between the protrusion and the side surface of the wax mould is the same as the angle of the hole of the target porous superalloy thin-wall circular tube casting. In the invention, the bulges are preferably arranged on the surface of the core in an array mode, and the distance between every two adjacent bulges is preferably 10-15 mm.
In the present invention, the projection is preferably columnar, and more preferably columnar. In the invention, the protrusion is preferably 1-5 mm higher than the surface of the wax mould, and more preferably 2-3 mm. In the present invention, the diameter of the cylindrical protrusion is preferably 0.5 to 3mm, and more preferably 0.8 to 2 mm. In the invention, the diameter of the cylindrical bulge is the same as the hole diameter of the target porous superalloy thin-wall circular tube casting.
The invention has no special requirements on the components of the wax pattern, and the wax for industrial investment casting, which is conventional in the field, can be adopted. In the invention, the shape and the size of the wax mould are consistent with those of the target porous superalloy thin-wall round tube casting, and particularly, the thickness of the wax mould is the same as that of the target porous superalloy thin-wall round tube casting.
In the invention, the thickness of the wax mould is preferably 0.4-3 mm, and more preferably 0.4-1 mm.
After the intermediate wax pattern is obtained, the intermediate wax pattern is dipped with the slurry coating, and the casting mold is obtained after dewaxing.
In the present invention, the top of the intermediate wax pattern is preferably fixedly connected to the bracket. In the present invention, the stent is preferably a ceramic stent. In the invention, the diameter of the bracket is preferably 10-30 mm.
In the invention, the center of the top circle of the intermediate wax mold is preferably fixedly connected with the bracket. In the present invention, the fixed connection is preferably a high temperature resistant fixed connection, and particularly preferably a snap connection or a threaded connection.
In the present invention, the bottom of the intermediate wax pattern is preferably fixedly connected to the amplifier.
Before the slurry coating is carried out, the invention preferably further comprises: assembling the intermediate wax pattern onto a runner. In the invention, the liquid outlet of the pouring channel is communicated with the amplifier.
In the invention, when the casting of the thin-wall round tube made of the porous single crystal superalloy is prepared, the method preferably further comprises the following steps after the intermediate wax mold is obtained: connecting the bottom of the intermediate wax mold with a crystal selector-amplifier assembly to obtain an investment assembly; and dipping the fired mold assembly with slurry coating, and dewaxing to obtain a casting mold.
In the invention, the crystal selector-amplifier assembly consists of an amplifier and a crystal selector which are connected in sequence. The invention has no special requirement on the combination mode of the crystal selector and the amplifier, and the combination mode well known in the field can be adopted.
In the present invention, the amplifier is preferably an inverted circular truncated cone amplifier; the crystal selector is preferably a spiral crystal selector. In the present invention, the amplifier is preferably connected to the bottom of the intermediate wax pattern. In the invention, the material of the crystal selector-amplifier assembly is preferably wax.
In the invention, when a casting of a thin-walled single-crystal superalloy circular tube with a hole is prepared, the slurry coating is preferably performed before the step of: assembling the investment assembly onto a runner. In the present invention, the outlet of the runner is in communication with the crystal selector-amplifier assembly, and more preferably in communication with the amplifier.
In the invention, the slurry adopted by the slurry coating is preferably silica sol, and the coating is preferably Al2O3。
According to the invention, after the slurry coating is dipped, a shell is formed, and a casting mould is obtained after dewaxing. The invention has no special requirements on the specific process of the slurry coating, and adopts the processes well known in the field.
In the present invention, the dewaxing process is preferably steam dewaxing. In the invention, the steam dewaxing temperature is preferably 120-150 ℃, and more preferably 130-140 ℃; the time for the steam dewaxing is preferably 20-60 min, and more preferably 30-50 min.
In the dewaxing process, the wax mould, the amplifier or the crystal selector-amplifier assembly and the pouring channel are removed to obtain a casting mould.
After a casting mold is obtained, the high-temperature alloy melt is cast into the casting mold to obtain the porous high-temperature alloy thin-wall circular tube casting. In the present invention, the composition of the superalloy melt preferably comprises a nickel-based superalloy, a cobalt-based superalloy, or Ni3The Al-based superalloy is preferably a Ni-6Al-6Ta-2Cr-5Mo alloy melt or a Ni-5.2Al-3.8Ta-8.9Cr-2Mo-10Co-7W alloy melt.
Before the casting, the invention preferably further comprises: preheating the casting mould. In the invention, the preheating temperature is preferably 800 ℃, and the heat preservation time is preferably 1-20 min, and more preferably 10 min. The invention preheats the shell and the core, and can prevent the high-temperature alloy melt from being solidified too fast after entering the casting mould.
The invention has no special requirement on the casting temperature, and the casting temperature can be adjusted according to the normal casting temperature of the corresponding alloy. In the invention, when the components of the high-temperature alloy melt are nickel-based high-temperature alloy, the casting temperature is preferably 1300-1560 ℃, and more preferably 1520-1540 ℃; the drawing speed is preferably 1 to 5mm/min, more preferably 3.5 to 4 mm/min. In the invention, the drawing speed refers to the speed of the casting mold far away from the heating zone in the preparation process of the porous high-temperature alloy thin-wall circular tube casting; and after the casting mold is filled with the high-temperature alloy melt, the casting mold is separated from the heating area at a certain speed, so that the high-temperature alloy melt in the casting mold is directionally solidified, and the porous high-temperature alloy thin-wall circular tube casting is obtained.
The invention preferably uses a bottom-injection method for casting. In the invention, the high-temperature alloy melt firstly flows into the crystal selector, then enters the amplifier, then fills the whole casting mould, and gradually solidifies from bottom to top until the whole casting is completely solidified.
In the present invention, the casting is preferably performed in a solidification furnace.
After the casting is finished, the invention preferably also comprises removing a casting surface shell, cutting off the shell around the crystal selector-amplifier assembly, the shell around the pouring channel and the bracket, and performing heat treatment after removing the core to obtain the porous high-temperature alloy thin-wall circular tube casting. In the present invention, the method for removing the core is preferably an alkaline cooking method. In the present invention, the alkaline cooking method is particularly preferably: and (3) placing the casting without the core removed in an alkaline solution, and heating the alkaline solution to dissolve the core in the alkaline solution.
The method can be used for preparing the high-temperature alloy thin-wall circular tube casting with the hole and the wall thickness of 0.4-3 mm, which has uniform wall thickness and meets the shape requirement. The round pipe prepared by the invention can form the required holes during initial casting molding, thereby avoiding the conditions of stress formation around the holes, local tissue structure damage and the like during subsequent hole making by using other mechanical processing and other means, effectively improving the tissue and structural integrity of the thin-walled round pipe with the holes, and simultaneously reducing the processing stress around the holes.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in FIG. 1, a wax pattern having a thickness of 3mm was prepared on a cylindrical ceramic core having a length of 50mm, a diameter of 14mm, a height of 5mm on the surface and a diameter of 3mmThe intermediate wax pattern obtained after completion is shown in fig. 2; connecting the bottom of the obtained intermediate wax mold with a crystal selector-amplifier assembly, and connecting the top of the intermediate wax mold with a bracket with the diameter of 10mm to obtain an investment mold assembly; communicating an amplifier in the crystal selector-amplifier assembly with a liquid outlet of a pouring channel; and then carrying out slurry coating on the fired mold assembly, wherein the slurry is selected from silica sol, and the coating is selected from Al2O3Repeatedly dipping the slurry to form a shell, as shown in FIG. 3; and (3) dewaxing by adopting a steam dewaxing method at the dewaxing temperature of 130 ℃ for 30min to obtain the required casting mould. Heating the casting mould to 800 ℃, preserving heat for 10min, then placing the casting mould into a vacuum induction single crystal furnace for casting, wherein the cast melt is Ni-6Al-6Ta-2Cr-5Mo alloy melt, the casting temperature is 1540 ℃, the drawing speed is 3.5mm/min, removing a surface shell, cutting off the shell around a crystal selector-amplifier assembly, the shell around a pouring gate and a support, removing a core to obtain a porous single crystal high-temperature alloy thin-wall circular tube casting, and polishing the casting as shown in figure 4. As can be seen from FIG. 4, the porous single crystal superalloy thin-wall circular tube casting prepared by the method is smooth and free of defects after surface polishing, and has no macroscopic defects such as under-casting and cracks.
The microstructure of the cast of the single crystal superalloy thin-walled circular tube with holes prepared in this example is shown in FIG. 5. As can be seen from FIG. 5, the porous single crystal superalloy thin-walled circular tube casting prepared by the method has the advantages of fine dendritic structure and uniform dendritic distribution.
Example 2
In order to prepare a superalloy circular tube having a length of 40mm, a diameter of 14mm, and a thickness of 1mm, a ceramic core having a length of 40mm, a diameter of 14mm, and a surface with 3mm high cylindrical protrusions was selected, as shown in fig. 6. And preparing a wax mold with the thickness of 1mm on the ceramic core, wherein the wax mold is wax for conventional industrial investment casting. Connecting the top of an intermediate wax mold consisting of a wax mold and a ceramic core with a bracket with the diameter of 10mm, connecting the bottom of the intermediate wax mold with an amplifier, communicating the amplifier with a liquid outlet of a pouring channel, and then carrying out slurry coating on the intermediate wax mold, wherein the slurry is silica sol, and the coating is Al2O3Repeatedly dipping with a coating to obtain a shell, e.g.As shown in fig. 7. And (3) dewaxing by adopting a steam dewaxing method at the dewaxing temperature of 130 ℃ for 30min to obtain the required casting mould. Heating the casting mould to 800 ℃, preserving heat for 10min, then placing the casting mould into a vacuum induction single crystal furnace for casting, wherein the cast melt is Ni-5.2Al-3.8Ta-8.9Cr-2Mo-10Co-7W alloy melt, the casting temperature is 1520 ℃, the drawing speed is 5mm/min, removing a surface shell, cutting off a shell around an amplifier, a shell around a pouring gate and a bracket, removing a core to obtain a porous high-temperature alloy thin-wall circular tube casting, and polishing the casting as shown in figure 8. As can be seen from FIG. 8, the surface of the cast product after polishing was smooth and free of defects and macroscopic defects.
A section of the longitudinal polished section of the porous superalloy thin-walled circular tube casting prepared in the embodiment is enlarged, as shown in FIG. 9, directionally solidified columnar crystals with good growth vigor can be obviously seen, and the whole circular tube has good microstructure from a macroscopic surface and is suitable for corresponding experimental research.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A preparation method of a porous high-temperature alloy thin-wall round pipe casting comprises the following steps:
wrapping the core in a wax mold to obtain an intermediate wax mold; the surface of the core is provided with a bulge penetrating through the wax mould; the shape and the size of the wax mould are consistent with those of a target porous high-temperature alloy thin-wall circular tube casting;
dipping the intermediate wax pattern with a slurry coating, and dewaxing to obtain a casting mold;
and casting the high-temperature alloy melt into the casting mold to obtain the porous high-temperature alloy thin-wall circular tube casting.
2. The production method according to claim 1, wherein the angle of the projection of the core surface with the wax pattern side surface is more than 0 ° and less than 180 °.
3. The method according to claim 1 or 2, wherein the mass content of alumina in the core is not less than 99%.
4. The method according to claim 1, wherein the wax pattern has a thickness of 0.4 to 3 mm.
5. The method of claim 1, wherein the top of the intermediate wax pattern is fixedly attached to a support.
6. The method of claim 1, wherein after obtaining the intermediate wax pattern, further comprising: and connecting the bottom of the intermediate wax mold with a crystal selector-amplifier assembly to obtain the investment mold assembly.
7. The method of claim 6, wherein the amplifier of the crystal selector-amplifier assembly is connected to the bottom of the intermediate wax pattern; the material of the crystal selector-amplifier assembly is wax.
8. The method of claim 1, further comprising, prior to applying the size coating, the steps of: assembling the intermediate wax pattern onto a runner.
9. The method of claim 1, further comprising, prior to the casting: preheating the casting mould; the preheating temperature is 800 ℃, and the heat preservation time is 1-20 min.
10. The method according to claim 1, wherein the casting temperature is 1300-1560 ℃ and the drawing speed is 1-5 mm/min.
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| CN202111191289.6A CN113909440A (en) | 2021-10-13 | 2021-10-13 | Preparation method of porous high-temperature alloy thin-wall circular tube casting |
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| CN202111191289.6A CN113909440A (en) | 2021-10-13 | 2021-10-13 | Preparation method of porous high-temperature alloy thin-wall circular tube casting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117399587A (en) * | 2023-11-23 | 2024-01-16 | 烟台大学 | High-temperature alloy part forming method and device |
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- 2021-10-13 CN CN202111191289.6A patent/CN113909440A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117399587A (en) * | 2023-11-23 | 2024-01-16 | 烟台大学 | High-temperature alloy part forming method and device |
| CN117399587B (en) * | 2023-11-23 | 2024-02-27 | 烟台大学 | A method and device for forming high-temperature alloy parts |
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Application publication date: 20220111 |