CN110640145B - Preparation method of nickel-based alloy thin-wall circular tube - Google Patents
Preparation method of nickel-based alloy thin-wall circular tube Download PDFInfo
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- CN110640145B CN110640145B CN201910911492.2A CN201910911492A CN110640145B CN 110640145 B CN110640145 B CN 110640145B CN 201910911492 A CN201910911492 A CN 201910911492A CN 110640145 B CN110640145 B CN 110640145B
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 65
- 239000000956 alloy Substances 0.000 title claims abstract description 65
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 202
- 239000011780 sodium chloride Substances 0.000 claims abstract description 101
- 239000011248 coating agent Substances 0.000 claims abstract description 36
- 238000000576 coating method Methods 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000011812 mixed powder Substances 0.000 claims abstract description 19
- 238000005303 weighing Methods 0.000 claims abstract description 15
- 238000005245 sintering Methods 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 238000007750 plasma spraying Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims description 13
- 238000004321 preservation Methods 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000005488 sandblasting Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 6
- 239000000758 substrate Substances 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000601 superalloy Inorganic materials 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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- 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
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
-
- 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
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
- B22F3/1134—Inorganic fillers
-
- 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
- B22F3/115—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by spraying molten metal, i.e. spray sintering, spray casting
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
-
- 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
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F2005/103—Cavity made by removal of insert
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- Chemical Kinetics & Catalysis (AREA)
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- Metallurgy (AREA)
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Abstract
The invention discloses a preparation method of a nickel-based alloy thin-wall circular tube, which comprises the following steps: firstly, weighing alloy powder and sodium chloride, and uniformly mixing to obtain mixed powder; in addition, sodium chloride is weighed to prepare a sodium chloride round bar; spraying the mixed powder on the surface of a sodium chloride round bar rotating at a constant speed by an atmospheric plasma spraying method; putting the sodium chloride round bar with the coating into a vacuum furnace, and sintering at high temperature; the porous high-temperature alloy cylindrical thin-wall circular tube is prepared by combining high-sphericity high-temperature alloy powder with a plasma spraying method, the process is simple, the wall thickness of the tube is controllable, and the substrate material can be recycled.
Description
Technical Field
The invention belongs to the technical field of high-temperature alloy powder metallurgy, and relates to a preparation method of a nickel-based alloy thin-wall circular tube.
Background
The porous material is an excellent engineering material, has double attributes of function and structure, and is a structural functional material which is widely used and has great application potential. The porous material has the characteristics of low density, high porosity, large specific surface area and the like, and is widely applied to industries such as aerospace, atomic energy, environmental protection, electrochemistry, petrochemical engineering, metallurgy, machinery, medicine, construction and the like, and occasions such as separation, filtration, gas distribution, catalysis, electrochemical processes, noise reduction, shock absorption, shielding, heat exchange and the like, and plays a great role in construction and development of scientific technology and national economy.
At present, most of common porous materials are titanium and titanium alloy or stainless steel materials. However, as the use environment is more and more severe, there is a certain development direction to prepare the porous material using the raw material having more excellent properties. The high-temperature alloy is a metal material which takes iron, nickel and cobalt as the base and can work for a long time at the high temperature of more than 600 ℃ under the action of certain stress; and has high-temperature strength, good oxidation resistance and corrosion resistance, good fatigue performance, good fracture toughness and other comprehensive properties. The porous material is prepared by taking the high-temperature alloy as a base material, and has a certain application prospect.
The traditional preparation method of the metal porous circular tube adopts a powder sintering mode, namely powder and a pore-forming agent are pressed into a specific shape and then sintered in a vacuum furnace, and for a test piece with a thin-wall appearance, the smaller the thickness of the test piece is, the greater the process difficulty is.
Disclosure of Invention
The invention aims to provide a preparation method of a nickel-based alloy thin-wall round tube, which solves the problem that the thickness of the alloy round tube is difficult to reduce in the prior art.
The technical scheme adopted by the invention is that the preparation method of the nickel-based alloy thin-wall circular tube specifically comprises the following steps:
step 1, weighing nickel-based alloy powder and sodium chloride, and uniformly mixing the nickel-based alloy powder and the sodium chloride according to a proportion to obtain mixed powder for later use;
step 3, spraying the mixed powder obtained in the step 1 to the surface of a sodium chloride round bar rotating at a constant speed by an atmospheric plasma spraying method;
step 4, putting the sodium chloride round bar with the coating into a vacuum furnace, sintering at high temperature, then preserving heat, and cooling to room temperature along with the furnace after heat preservation is finished;
and 5, putting the sodium chloride round bar with the coating into water, and cleaning by using ultrasonic waves until the sodium chloride round bar is dissolved and falls off to obtain the alloy round tube.
In the step 1, the granularity of the alloy powder is 15-150 microns, the granularity of sodium chloride is 20-90 microns, and the mass ratio of the sodium chloride to the alloy powder is 1: 5 to 20.
In the step 2, the inner diameter of the die is 10-100 mm, the length of the die is 80-150 mm, and the thickness of the die is 3 mm.
In the step 3, the rotating speed of the sodium chloride round bar is 20 r/min-100 r/min.
In the step 3, the thickness of the coating is 0.2-20 mm, the length of the coating is 80-150 mm, and the diameter of the coating is 10-100 mm.
In the step 4, the sintering temperature is 600-1200 ℃, and the heat preservation time is 1-3 h.
In the step 5, the ultrasonic frequency is 20-130 KHz, the cleaning time is 4-10 h, and the cleaning temperature is 50-60 ℃.
And 5, performing sand blasting treatment on the inner wall and the surface of the alloy round pipe.
The invention has the beneficial effects that the alloy circular tube is prepared by combining high-sphericity high-temperature alloy powder with a plasma spraying method, the process is simple, the thickness of the tube wall is controllable, and the substrate material can be recycled, so that the preparation method is economic and effective. According to the traditional preparation method, powder is pressed into a blank with a required shape, and then a final product is obtained through sintering, but as the thickness of a tube blank is reduced, the forming difficulty is increased, and a porous rod tube with the thickness smaller than 1mm is difficult to obtain, and the porous high-temperature alloy tube prepared by the method has the advantages of 0.2-20 mm in thickness, uniform pore size and certain application prospect.
Drawings
FIG. 1 is a schematic diagram of the operation of a nickel-based superalloy porous thin-walled circular tube of the present invention;
FIG. 2 is a micro-topography of a cross section of a nickel-based superalloy porous thin-walled circular tube according to the present invention.
In the figure, 1 is a plasma gun, 2 is a sodium chloride round bar, and 3 is an alloy round tube.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a preparation method of a nickel-based alloy thin-wall circular tube, which comprises the following steps:
step 1, weighing nickel-based alloy powder and sodium chloride, and uniformly mixing the nickel-based alloy powder and the sodium chloride according to a proportion to obtain mixed powder for later use;
step 3, spraying the mixed powder obtained in the step 1 to the surface of a sodium chloride round bar rotating at a constant speed by an atmospheric plasma spraying method;
step 4, putting the sodium chloride round bar with the coating into a vacuum furnace, sintering at high temperature, then preserving heat, and cooling to room temperature along with the furnace after heat preservation is finished;
and 5, putting the sodium chloride round bar with the coating into water, and cleaning by using ultrasonic waves until the sodium chloride round bar is dissolved and falls off to obtain the alloy round tube.
In the step 1, the granularity of the alloy powder is 15-150 microns, the granularity of sodium chloride is 20-90 microns, and the mass ratio of the sodium chloride to the alloy powder is 1: 5 to 20.
In the step 2, the inner diameter of the die is 10-100 mm, the length of the die is 80-150 mm, and the thickness of the die is 3 mm.
In the step 3, the rotating speed of the sodium chloride round bar is 20 r/min-100 r/min.
In the step 3, the thickness of the coating is 0.2-20 mm, the length of the coating is 80-150 mm, and the diameter of the coating is 10-100 mm.
In the step 4, the sintering temperature is 600-1200 ℃, and the heat preservation time is 1-3 h.
In the step 5, the ultrasonic frequency is 20-130 KHz, the cleaning time is 4-10 h, and the cleaning temperature is 50-60 ℃.
And 5, performing sand blasting treatment on the inner wall and the surface of the alloy round pipe.
The alloy powder used in the invention is high-sphericity alloy powder prepared by a PREP technology, the thermal spraying method used in the invention is a method for heating the mixed powder to a molten or semi-molten state and striking the mixed powder to the surface of a sodium chloride round bar at a high speed to obtain a coating with a certain thickness, the method can prepare a thinner coating, and the coating thickness is easy to control.
Example 1
The invention relates to a preparation method of a nickel-based alloy thin-wall circular tube, which comprises the following steps:
step 1, weighing nickel-based alloy powder and sodium chloride, and uniformly mixing according to a ratio of 8:1, wherein the granularity of the alloy powder is 15 microns, and the granularity of the sodium chloride is 20 microns to obtain mixed powder for later use;
step 3, spraying the mixed powder obtained in the step 1 to the surface of a sodium chloride round bar rotating at a constant speed by an atmospheric plasma spraying method, wherein the rotating speed of the sodium chloride round bar is 100r/min, the moving speed of a plasma gun is 1m/s, and the thickness of a spraying layer is 1 mm;
step 4, putting the sodium chloride round bar with the coating into a vacuum furnace, sintering at the high temperature of 900 ℃, then preserving heat for 1h, and cooling to room temperature along with the furnace after heat preservation is finished;
and 5, putting the sodium chloride round bar with the coating into water of 50 ℃, cleaning for 4 hours by using 20KHz ultrasonic waves, dissolving and dropping the sodium chloride round bar, remaining the coating, and performing sand blasting treatment on the inner wall and the outer wall of the coating to obtain the alloy round tube.
Example 2
The invention relates to a preparation method of a nickel-based alloy thin-wall circular tube, which comprises the following steps:
step 1, weighing nickel-based alloy powder and sodium chloride, and uniformly mixing the nickel-based alloy powder and the sodium chloride according to a ratio of 5:1, wherein the granularity of the alloy powder is 50 microns, and the granularity of the sodium chloride is 40 microns to obtain mixed powder for later use;
step 3, spraying the mixed powder obtained in the step 1 to the surface of a sodium chloride round bar rotating at a constant speed by an atmospheric plasma spraying method, wherein the rotating speed of the sodium chloride round bar is 50r/min, the moving speed of a plasma gun is 0.5m/s, and the thickness of a spraying layer is 0.2 mm;
step 4, putting the sodium chloride round bar with the coating into a vacuum furnace, sintering at the high temperature of 1200 ℃, then preserving heat for 1.5h, and cooling to room temperature along with the furnace after heat preservation is finished;
and 5, putting the sodium chloride round bar with the coating into water of 55 ℃, cleaning for 6 hours by using 90KHz ultrasonic waves, dissolving and dropping the sodium chloride round bar, remaining the coating, and performing sand blasting treatment on the inner wall and the outer wall of the coating to obtain the alloy round tube.
Example 3
The invention relates to a preparation method of a nickel-based alloy thin-wall circular tube, which comprises the following steps:
step 1, weighing nickel-based alloy powder and sodium chloride, and uniformly mixing the nickel-based alloy powder and the sodium chloride according to a ratio of 20:1, wherein the granularity of the alloy powder is 150 mu m, and the granularity of the sodium chloride is 90 mu m to obtain mixed powder for later use;
step 3, spraying the mixed powder obtained in the step 1 to the surface of a sodium chloride round bar rotating at a constant speed by an atmospheric plasma spraying method, wherein the rotating speed of the sodium chloride round bar is 20r/min, the moving speed of a plasma gun is 2m/s, and the thickness of a spraying layer is 5 mm;
step 4, putting the sodium chloride round bar with the coating into a vacuum furnace, sintering at the high temperature of 600 ℃, then preserving heat for 3 hours, and cooling to room temperature along with the furnace after heat preservation is finished;
and 5, putting the sodium chloride round bar with the coating into water of 60 ℃, cleaning for 10 hours by using 130KHz ultrasonic waves, dissolving and dropping the sodium chloride round bar, remaining the coating, and performing sand blasting treatment on the inner wall and the outer wall of the coating to obtain the alloy round tube.
Example 4
The invention relates to a preparation method of a nickel-based alloy thin-wall circular tube, which comprises the following steps:
step 1, weighing nickel-based alloy powder and sodium chloride, and uniformly mixing the nickel-based alloy powder and the sodium chloride according to a ratio of 10:1, wherein the granularity of the alloy powder is 75 micrometers, and the granularity of the sodium chloride is 70 micrometers to obtain mixed powder for later use;
step 3, spraying the mixed powder obtained in the step 1 to the surface of a sodium chloride round bar rotating at a constant speed by an atmospheric plasma spraying method, wherein the rotating speed of the sodium chloride round bar is 70r/min, the moving speed of a plasma gun is 2m/s, and the thickness of a spraying layer is 20 mm;
step 4, putting the sodium chloride round bar with the coating into a vacuum furnace, sintering at the high temperature of 700 ℃, then preserving heat for 1h, and cooling to room temperature along with the furnace after heat preservation is finished;
and 5, putting the sodium chloride round bar with the coating into water of 60 ℃, cleaning for 7 hours by using 100KHz ultrasonic waves, dissolving and dropping the sodium chloride round bar, remaining the coating, and performing sand blasting treatment on the inner wall and the outer wall of the coating to obtain the alloy round tube.
The thicknesses and the void ratios of the round alloy tubes prepared in the examples 1, 2 and 3 of the present invention are shown in table 1:
TABLE 1 thickness and void fraction of round alloy tubes
As can be seen from the table, the alloy round tube prepared by the invention has controllable wall thickness and similar average pore size.
Fig. 1 is a schematic diagram of an alloy round tube prepared by a spraying method, in which mixed powder is uniformly sprayed onto a sodium chloride round rod by a plasma gun to form a coating, and fig. 2 is a schematic diagram of the cross section of the alloy round tube prepared by the present invention.
Claims (4)
1. The preparation method of the nickel-based alloy thin-wall circular tube is characterized by comprising the following steps of:
step 1, weighing nickel-based alloy powder and sodium chloride, and uniformly mixing the nickel-based alloy powder and the sodium chloride according to a proportion to obtain mixed powder for later use; the particle size of the alloy powder is 15-150 microns, the particle size of the sodium chloride is 20-90 microns, and the mass ratio of the sodium chloride to the alloy powder is 1: 5-20;
step 2, weighing sodium chloride, putting the sodium chloride into a stainless steel mold, pressurizing the sodium chloride by using a pressing block, and removing the mold after the volume of the sodium chloride is unchanged to obtain a sodium chloride round bar;
step 3, spraying the mixed powder obtained in the step 1 to the surface of a sodium chloride round bar rotating at a constant speed by an atmospheric plasma spraying method; the rotating speed of the sodium chloride round bar is 20 r/min-100 r/min, and the moving speed of the plasma gun is 0.1-2 m/s; the thickness of the coating is 0.2-20 mm, the length of the coating is 80-150 mm, and the diameter of the coating is 10-100 mm;
step 4, putting the sodium chloride round bar with the coating into a vacuum furnace, sintering at high temperature, then preserving heat, and cooling to room temperature along with the furnace after heat preservation is finished; the sintering temperature is 600-1200 ℃, and the heat preservation time is 1-3 h;
and 5, putting the sodium chloride round bar with the coating into water, and cleaning by using ultrasonic waves until the sodium chloride round bar is dissolved and falls off to obtain the alloy round tube.
2. The method for preparing the nickel-based alloy thin-walled circular tube as claimed in claim 1, wherein in the step 2, the inner diameter of the mold is 10-100 mm, the length of the mold is 80-150 mm, and the thickness of the mold is 3 mm.
3. The method for preparing the nickel-based alloy thin-walled circular tube as claimed in claim 1, wherein in the step 5, the ultrasonic frequency is 20 to 130KHz, the cleaning time is 4 to 10 hours, and the cleaning temperature is 50 to 60 ℃.
4. The method for preparing the nickel-based alloy thin-walled circular tube as claimed in claim 1, wherein in the step 5, the inner wall and the surface of the circular tube are subjected to sand blasting.
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