CN113351870A - Precise forming method for nickel-based high-temperature alloy high-pressure-bearing complex runner shell - Google Patents
Precise forming method for nickel-based high-temperature alloy high-pressure-bearing complex runner shell Download PDFInfo
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 44
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 33
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 32
- 239000000956 alloy Substances 0.000 title claims abstract description 32
- 238000001513 hot isostatic pressing Methods 0.000 claims abstract description 19
- 229910000816 inconels 718 Inorganic materials 0.000 claims abstract description 17
- 238000004663 powder metallurgy Methods 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 16
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 239000011651 chromium Substances 0.000 claims description 10
- 239000010936 titanium Substances 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 229910052719 titanium Inorganic materials 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 238000011978 dissolution method Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000011733 molybdenum Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 229910000601 superalloy Inorganic materials 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052745 lead Inorganic materials 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 229910052715 tantalum Inorganic materials 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
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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
-
- 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
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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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)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a precision forming method of a nickel-based high-temperature alloy high-pressure complex flow passage shell, which is characterized in that the method adopts a hot isostatic pressure powder metallurgy process to prepare the nickel-based alloy high-pressure complex flow passage shell, and QB low-carbon steel is used as a raw material of a powder metallurgy sheath; and processing the high-pressure-bearing complex flow channel shell to form an outer sheath and a flow channel core, filling ultralow-clearance-phase Inconel718 alloy spherical powder into the sheath, and performing hot isostatic pressing treatment to obtain the high-pressure-bearing complex flow channel shell component. The method solves the problem that the traditional casting process can not meet the quality requirement of the nickel-based high-temperature alloy high-pressure complex runner thin-wall shell, and provides the method for preparing the high-internal-quality, high-surface-quality, high-dimensional-precision and high-pressure-bearing shell product by adopting the hot isostatic pressure powder metallurgy process.
Description
Technical Field
The invention belongs to the technical field of nickel-based high-temperature alloy component manufacturing, and particularly relates to a precise forming method for preparing a nickel-based high-pressure-bearing complex runner thin-wall shell by a hot isostatic pressure powder metallurgy process.
Background
The nickel-based high-temperature alloy has excellent characteristics of excellent corrosion resistance, good low-temperature performance and the like, and is widely applied to the field of rocket engine manufacturing.
At present, nickel-based high-temperature alloy high-pressure-bearing complex variable-camber runner shell parts for rocket engines are widely prepared by adopting a vacuum induction melting investment precision casting forming method, along with the increasing performance requirements of the rocket engines, the shell runners and the structural design are more and more complex, the working conditions are more and more harsh, the shell parts are prepared by adopting the traditional casting method, a large amount of looseness and crack defects exist in castings, the casting quality can not meet the performance requirements, a novel forming method is urgently needed to carry out integrated forming on the nickel-based high-temperature alloy high-pressure-bearing complex variable-camber runner shell parts, the characteristics of high surface quality, high internal quality and high dimensional precision of the parts are ensured, and the engineering application requirements of the rocket engines are met.
The nickel-based high-pressure-bearing complex runner thin-wall shell casting product of the rocket engine generally has the defects of looseness, cold shut, pores, cracks and the like, cannot meet the requirements of higher-quality rocket engine parts in the future, and a method for forming the nickel-based high-temperature alloy complex junction part with high internal quality and high surface quality is urgently needed to be developed, so that the product quality is improved, the quality cost is reduced, and the production efficiency is improved.
The powder metallurgy Hot Isostatic Pressing (HIP) near-net forming technology has great flexibility in preparing various products with complex structures, not only can near-net form various products with complex shapes, but also can manufacture products with complex shapes in inner cavities, can greatly improve the material utilization rate, reduce the production cost, ensure high internal quality and high surface quality of parts, has the process advantage of batch quality stability, and is one of important process methods for developing high-quality part forming in future
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a precision forming method for preparing a nickel-based high-pressure-bearing complex-runner thin-wall shell by a hot isostatic pressure powder metallurgy process, solves the problem that the traditional casting process cannot meet the quality requirement of the nickel-based high-temperature-bearing complex-runner thin-wall shell, and provides a method for preparing a high-pressure-bearing shell product with high internal quality, high surface quality, high dimensional precision and high pressure-bearing quality by the hot isostatic pressure powder metallurgy process.
In order to achieve the purpose, the invention is obtained by the following technical scheme:
a method for preparing a nickel-based superalloy high-pressure-bearing complex flow passage thin-wall shell by adopting hot isostatic pressure powder metallurgy and a sheath material thereof comprises the following specific steps:
step 1, preparing raw material QB low-carbon steel required by the powder metallurgy sheath, wherein the raw material QB low-carbon steel comprises the following components in percentage by mass: 0.05-0.15% of carbon, 0.2-0.39% of silicon, 0.50-0.80% of titanium, 3.50-4.50% of molybdenum, less than or equal to 0.040% of phosphorus, less than or equal to 0.040% of S, less than or equal to 0.20% of chromium, less than or equal to 0.20% of nickel and the balance of iron.
And 2, designing a high-pressure-bearing complex flow channel shell sheath, and processing the high-pressure-bearing complex flow channel shell to form an outer sheath and a flow channel core.
Step 3, assembling and welding the high-pressure-bearing complex flow channel shell outer sheath and the mold core processed in the step 2 to obtain a high-pressure-bearing complex flow channel shell forming sheath;
step 4, filling ultralow-gap-phase Inconel718 alloy spherical powder with the particle size of 45-180 mu m into the high-pressure-bearing complex flow channel shell forming sheath obtained in the step 3;
inconel718 alloy powder composition: 0.03 to 0.08 percent of C, 17.00 to 21.00 percent of Cr, 50.00 to 55.00 percent of Ni, 2.80 to 3.30 percent of Mo, 0.40 to 0.80 percent of Al, 0.65 to 1.15 percent of Ti, 4.40 to 5.40 percent of Nb, less than or equal to 0.35 percent of Mn, less than or equal to 0.35 percent of Si, less than or equal to 0.015 percent of S, less than or equal to 0.015 percent of P, less than or equal to 1.00 percent of Co, less than or equal to 0.30 percent of Cu, less than or equal to 0.10 percent of Ta, less than or equal to 0.03 percent of Zr, less than or equal to 0.006 percent of B, less than or equal to 0.001 percent of Pb, less than or equal.
Step 5, sheathing the high-pressure-bearing complex flow passage shell filled with the powder in the step 4, heating to 300-400 ℃, and vacuumizing at high temperature, wherein the vacuum degree is less than or equal to 10-3Pa, then sealing and welding;
step 6, performing hot isostatic pressing treatment on the high-pressure-bearing pump body forming sheath sealed and welded in the step 5, wherein the hot isostatic pressing process is conducted at 1160-1180 ℃ and 120-140 MPa of argon pressure, the temperature is kept for 2-3 hours, and the high-pressure-bearing pump body forming sheath is discharged after the furnace is cooled to below 300 ℃;
and 7, removing the high-pressure-bearing complex flow channel shell sheath subjected to hot isostatic pressing by a mechanical processing or chemical dissolution method to obtain the high-pressure-bearing complex flow channel shell component.
The invention has the advantages that:
aiming at the high-pressure-bearing complex runner thin-wall shell component for the rocket engine, the Inconel718 alloy component prepared by the process has the advantages of high internal quality, high surface quality and high performance, and meanwhile, compared with other process methods, the Inconel718 alloy component greatly improves the quality, shortens the production period and improves the production efficiency.
Detailed Description
The present invention is further described with reference to the following specific examples, but the scope of the present invention is not limited by the examples, and if one skilled in the art makes some insubstantial modifications and adaptations to the present invention based on the above disclosure, the present invention still falls within the scope of the present invention.
Example 1
The invention discloses a precise forming method of a nickel-based high-temperature alloy high-pressure-bearing complex runner shell, which comprises the following steps:
step 1, preparing raw material QB low-carbon steel required by the powder metallurgy sheath, wherein the raw material QB low-carbon steel comprises the following components in percentage by mass: 0.05 percent of carbon, 0.20 percent of silicon, 0.50 percent of titanium, 3.50 percent of molybdenum, less than or equal to 0.040 percent of phosphorus, less than or equal to 0.040 percent of S, less than or equal to 0.20 percent of chromium, less than or equal to 0.20 percent of nickel and the balance of iron.
And 2, designing a high-pressure-bearing complex flow channel shell sheath, and processing the high-pressure-bearing complex flow channel shell to form an outer sheath and a flow channel core.
Step 3, assembling and welding the high-pressure-bearing complex flow channel shell outer sheath and the mold core processed in the step 2 to obtain a high-pressure-bearing complex flow channel shell forming sheath;
step 4, filling ultralow-gap-phase Inconel718 alloy spherical powder with the particle size of 45-180 mu m into the high-pressure-bearing complex flow channel shell forming sheath obtained in the step 3;
inconel718 alloy powder composition: 0.03 percent of C, 17.00 percent of Cr, 50.00 percent of Ni, 2.80 percent of Mo, 0.40 percent of Al, 0.65 percent of Ti, 4.40 percent of Nb, less than or equal to 0.35 percent of Mn, less than or equal to 0.35 percent of Si, less than or equal to 0.015 percent of S, less than or equal to 0.015 percent of P, less than or equal to 1.00 percent of Co, less than or equal to 0.30 percent of Cu, less than or equal to 0.10 percent of Ta, less than or equal to 0.03 percent of Zr, less than or equal to 0.006 percent of B, less than or equal to 0.001 percent of Pb, less than or equal to 0.0001 percent of Bi, and the balance of Fe.
Step 5, sheathing the high-pressure-bearing complex flow passage shell filled with the powder in the step 4, heating to 300-400 ℃, and vacuumizing at high temperature, wherein the vacuum degree is less than or equal to 10-3Pa, then sealing and welding;
step 6, performing hot isostatic pressing treatment on the high-pressure-bearing pump body forming sheath sealed and welded in the step 5, wherein the hot isostatic pressing process is conducted at 1160-1180 ℃ and 120-140 MPa of argon pressure, the temperature is kept for 2-3 hours, and the high-pressure-bearing pump body forming sheath is discharged after the furnace is cooled to below 300 ℃;
and 7, removing the high-pressure-bearing complex flow channel shell sheath subjected to hot isostatic pressing by a mechanical processing or chemical dissolution method to obtain the high-pressure-bearing complex flow channel shell component.
The practical application is as follows: the Inconel718 alloy high-pressure-bearing complex flow channel thin-wall shell prepared by the hot isostatic pressing powder metallurgy process is used in liquid methane under the pressure of 20MPa, the surface quality of a product is free from cold shut and flow mark defects compared with a casting, the internal quality of the product is free from spongy looseness and slag inclusion defects compared with the casting, the tensile strength of the product can reach 1150MPa, the tensile strength of the product is improved by 10% compared with that of the casting product, the service life of the product is prolonged by 50% compared with that of the casting, and the economic benefit is obvious.
Example 2
The invention discloses a precise forming method of a nickel-based high-temperature alloy high-pressure-bearing complex runner shell, which comprises the following steps:
step 1, preparing raw material QB low-carbon steel required by the powder metallurgy sheath, wherein the raw material QB low-carbon steel comprises the following components in percentage by mass: 0.10 percent of carbon, 0.30 percent of silicon, 0.60 percent of titanium, 4.00 percent of molybdenum, less than or equal to 0.040 percent of phosphorus, less than or equal to 0.040 percent of S, less than or equal to 0.20 percent of chromium, less than or equal to 0.20 percent of nickel and the balance of iron; .
And 2, designing a high-pressure-bearing complex flow channel shell sheath, and processing the high-pressure-bearing complex flow channel shell to form an outer sheath and a flow channel core.
Step 3, assembling and welding the high-pressure-bearing complex flow channel shell outer sheath and the mold core processed in the step 2 to obtain a high-pressure-bearing complex flow channel shell forming sheath;
step 4, filling ultralow-gap-phase Inconel718 alloy spherical powder with the particle size of 45-180 mu m into the high-pressure-bearing complex flow channel shell forming sheath obtained in the step 3;
inconel718 alloy powder composition: 0.06% of C, 18.00% of Cr, 52.00% of Ni, 3.00% of Mo, 0.60% of Al, 0.80% of Ti, 5.00% of Nb, less than or equal to 0.35% of Mn, less than or equal to 0.35% of Si, less than or equal to 0.015% of S, less than or equal to 0.015% of P, less than or equal to 1.00% of Co, less than or equal to 0.30% of Cu, less than or equal to 0.10% of Ta, less than or equal to 0.03% of Zr, less than or equal to 0.006% of B, less than or equal to 0.001% of Pb, less than or equal to 0.0001% of Bi, and the balance of Fe.
Step 5, sheathing the high-pressure-bearing complex flow passage shell filled with the powder in the step 4, heating to 300-400 ℃, and vacuumizing at high temperature, wherein the vacuum degree is less than or equal to 10-3Pa, then sealing and welding;
step 6, performing hot isostatic pressing treatment on the high-pressure-bearing pump body forming sheath sealed and welded in the step 5, wherein the hot isostatic pressing process is conducted at 1160-1180 ℃ and 120-140 MPa of argon pressure, the temperature is kept for 2-3 hours, and the high-pressure-bearing pump body forming sheath is discharged after the furnace is cooled to below 300 ℃;
and 7, removing the high-pressure-bearing complex flow channel shell sheath subjected to hot isostatic pressing by a mechanical processing or chemical dissolution method to obtain the high-pressure-bearing complex flow channel shell component.
The practical application is as follows: the Inconel718 alloy high-pressure-bearing complex flow channel thin-wall shell prepared by the hot isostatic pressing powder metallurgy process is used in liquid methane under the pressure of 20MPa, compared with a forge piece in a split machining and welding mode, the product quality is reduced by 50%, and the economic benefit is obvious.
Example 3
The invention discloses a precise forming method of a nickel-based high-temperature alloy high-pressure-bearing complex runner shell, which comprises the following steps:
step 1, preparing raw material QB low-carbon steel required by the powder metallurgy sheath, wherein the raw material QB low-carbon steel comprises the following components in percentage by mass: 0.15 percent of carbon, 0.39 percent of silicon, 0.80 percent of titanium, 4.50 percent of molybdenum, less than or equal to 0.040 percent of phosphorus, less than or equal to 0.040 percent of S, less than or equal to 0.20 percent of chromium, less than or equal to 0.20 percent of nickel and the balance of iron; .
And 2, designing a high-pressure-bearing complex flow channel shell sheath, and processing the high-pressure-bearing complex flow channel shell to form an outer sheath and a flow channel core.
Step 3, assembling and welding the high-pressure-bearing complex flow channel shell outer sheath and the mold core processed in the step 2 to obtain a high-pressure-bearing complex flow channel shell forming sheath;
step 4, filling ultralow-gap-phase Inconel718 alloy spherical powder with the particle size of 45-180 mu m into the high-pressure-bearing complex flow channel shell forming sheath obtained in the step 3;
inconel718 alloy powder composition: 0.08 percent of C, 21.00 percent of Cr, 55.00 percent of Ni, 3.30 percent of Mo, 0.80 percent of Al, 1.15 percent of Ti, 5.40 percent of Nb, less than or equal to 0.35 percent of Mn, less than or equal to 0.35 percent of Si, less than or equal to 0.015 percent of S, less than or equal to 0.015 percent of P, less than or equal to 1.00 percent of Co, less than or equal to 0.30 percent of Cu, less than or equal to 0.10 percent of Ta, less than or equal to 0.03 percent of Zr, less than or equal to 0.006 percent of B, less than or equal to 0.001 percent of Pb, less than or equal to 0.0001 percent of Bi, and the balance of Fe.
Step 5, sheathing the high-pressure-bearing complex flow passage shell filled with the powder in the step 4, heating to 300-400 ℃, and vacuumizing at high temperature, wherein the vacuum degree is less than or equal to 10-3Pa, then sealing and welding;
step 6, performing hot isostatic pressing treatment on the high-pressure-bearing pump body forming sheath sealed and welded in the step 5, wherein the hot isostatic pressing process is conducted at 1160-1180 ℃ and 120-140 MPa of argon pressure, the temperature is kept for 2-3 hours, and the high-pressure-bearing pump body forming sheath is discharged after the furnace is cooled to below 300 ℃;
and 7, removing the high-pressure-bearing complex flow channel shell sheath subjected to hot isostatic pressing by a mechanical processing or chemical dissolution method to obtain the high-pressure-bearing complex flow channel shell component.
The practical application is as follows: the Inconel718 alloy high-pressure-bearing complex flow channel thin-wall shell prepared by the hot isostatic pressing powder metallurgy process is used in liquid methane under the pressure of 20MPa, the cost of the product is reduced by 70% compared with that of a material increase manufacturing process, the surface roughness of the product can reach Ra3.2 mu m and is superior to Ra6.3 mu m of the material increase manufacturing process, and the economic benefit is obvious.
Claims (6)
1. A precision forming method for a nickel-based high-temperature alloy high-pressure-bearing complex runner shell is characterized in that the method adopts a hot isostatic pressure powder metallurgy process to prepare the nickel-based alloy high-pressure-bearing complex runner shell, and comprises the following specific steps:
(1) QB low-carbon steel is adopted as a raw material of the powder metallurgy sheath;
(2) designing a high-pressure-bearing complex flow passage shell sleeve, and processing the high-pressure-bearing complex flow passage shell to form an outer sleeve and a flow passage core;
(3) preparing a high-pressure-bearing complex flow passage shell forming sheath: assembling and welding the high-pressure-bearing complex runner shell forming outer sheath and the runner core processed in the step (2);
(4) filling ultralow-gap-phase Inconel718 alloy spherical powder into the high-pressure-bearing complex flow channel shell forming sheath obtained in the step (3);
(5) forming and sheathing the high-pressure-bearing complex flow passage shell obtained in the step (4), heating to 300-400 ℃, and vacuumizing at high temperature, wherein the vacuum degree is less than or equal to 10-3Pa, then sealing and welding;
(6) carrying out hot isostatic pressing treatment on the high pressure-bearing pump body forming sheath sealed and welded in the step (5), and discharging the high pressure-bearing pump body forming sheath from a furnace when the furnace is cooled to below 300 ℃;
(7) and (4) removing the high-pressure-bearing complex flow channel shell sheath obtained in the step (6) by a mechanical processing or chemical dissolution method to obtain the high-pressure-bearing complex flow channel shell component.
2. The precision forming method for the nickel-based superalloy high-pressure-bearing complex runner casing according to claim 1, wherein the QB low-carbon steel raw material in the step (1) comprises the following materials in percentage by mass: 0.05-0.15% of carbon, 0.2-0.39% of silicon, 0.50-0.80% of titanium, 3.50-4.50% of molybdenum, less than or equal to 0.040% of phosphorus, less than or equal to 0.040% of S, less than or equal to 0.20% of chromium, less than or equal to 0.20% of nickel and the balance of iron.
3. The precision forming method of the nickel-based superalloy high-pressure-bearing complex flow passage shell according to claim 1, wherein the Inconel718 alloy spherical powder in the step (4) comprises the following specific components in percentage by mass: 0.03 to 0.08 percent of C, 17.00 to 21.00 percent of Cr, 50.00 to 55.00 percent of Ni, 2.80 to 3.30 percent of Mo, 0.40 to 0.80 percent of Al, 0.65 to 1.15 percent of Ti, 4.40 to 5.40 percent of Nb, less than or equal to 0.35 percent of Mn, less than or equal to 0.35 percent of Si, less than or equal to 0.015 percent of S, less than or equal to 0.015 percent of P, less than or equal to 1.00 percent of Co, less than or equal to 0.30 percent of Cu, less than or equal to 0.10 percent of Ta, less than or equal to 0.03 percent of Zr, less than or equal to 0.006 percent of B, less than or equal to 0.001 percent of Pb, less than or equal to 0.0001 percent of Bi, and the balance of Fe.
4. The precision forming method of the nickel-based superalloy high-pressure-bearing complex flow channel shell according to claim 1, wherein the particle size of the Inconel718 alloy spherical powder in the step (4) is 45-180 μm.
5. The precision forming method of the nickel-based superalloy high-pressure-bearing complex runner housing as claimed in claim 1, wherein the hot isostatic pressing process in the step (5) is conducted at 1160-1180 ℃ and 120-140 MPa argon pressure, and the temperature is kept for 2-3 hours.
6. Use of a high pressure complex flow channel housing part obtained by the method according to any of claims 1-5 in rocket motors.
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| CN105603259A (en) * | 2016-04-11 | 2016-05-25 | 西安欧中材料科技有限公司 | Powder metallurgical method for IN718 alloy |
| CN106513685A (en) * | 2016-11-10 | 2017-03-22 | 华中科技大学 | Powder near-molten state hot isostatic pressing net forming method |
| US20190134711A1 (en) * | 2017-11-06 | 2019-05-09 | Dongsheng Li | Method for processing additively manufactured nickel superalloy components with low porosity and high strength |
| CN110343908A (en) * | 2019-08-30 | 2019-10-18 | 江苏奇纳新材料科技有限公司 | The hip moulding and heat treatment process of IN718 alloy powder and its alloy |
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| CN105603259A (en) * | 2016-04-11 | 2016-05-25 | 西安欧中材料科技有限公司 | Powder metallurgical method for IN718 alloy |
| CN106513685A (en) * | 2016-11-10 | 2017-03-22 | 华中科技大学 | Powder near-molten state hot isostatic pressing net forming method |
| US20190134711A1 (en) * | 2017-11-06 | 2019-05-09 | Dongsheng Li | Method for processing additively manufactured nickel superalloy components with low porosity and high strength |
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Application publication date: 20210907 |