CN112077324A - Horizontal extrusion integrated sheath for powder high-temperature alloy and manufacturing method thereof - Google Patents
Horizontal extrusion integrated sheath for powder high-temperature alloy and manufacturing method thereof Download PDFInfo
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- CN112077324A CN112077324A CN202010925790.XA CN202010925790A CN112077324A CN 112077324 A CN112077324 A CN 112077324A CN 202010925790 A CN202010925790 A CN 202010925790A CN 112077324 A CN112077324 A CN 112077324A
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- 239000000843 powder Substances 0.000 title claims abstract description 54
- 238000001125 extrusion Methods 0.000 title claims abstract description 34
- 239000000956 alloy Substances 0.000 title claims abstract description 23
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000001513 hot isostatic pressing Methods 0.000 claims abstract description 23
- 238000003466 welding Methods 0.000 claims abstract description 20
- 238000000137 annealing Methods 0.000 claims abstract description 18
- 238000001192 hot extrusion Methods 0.000 claims abstract description 10
- 238000000280 densification Methods 0.000 claims abstract description 8
- 239000010935 stainless steel Substances 0.000 claims abstract description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 3
- 229910000601 superalloy Inorganic materials 0.000 claims description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 239000002775 capsule Substances 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 239000010964 304L stainless steel Substances 0.000 claims description 3
- 238000009924 canning Methods 0.000 claims 1
- 230000010354 integration Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 24
- 230000008569 process Effects 0.000 abstract description 19
- 238000007789 sealing Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract 1
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 12
- 238000004140 cleaning Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000011049 filling Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000010275 isothermal forging Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- 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
- B22F3/24—After-treatment of workpieces or articles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
-
- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention belongs to the technical field of powder high-temperature alloy, and relates to a horizontal extrusion integrated sheath for powder high-temperature alloy and a manufacturing method thereof, wherein the integrated sheath consists of a powder nozzle, a sheath upper cover, a sheath outer wall and a sheath tail gasket, and all parts are made of stainless steel and welded; and performing vacuum annealing after welding, thereby ensuring the sealing performance of the sheath and preventing the sheath from leaking in the processes of powder treatment and hot isostatic pressing. The sheath can be used as a powder sheath, and hot isostatic pressing is carried out after powder treated is filled, so that densification of high-temperature alloy powder is realized; the high-temperature alloy ingot blank can be used as a sheath for a subsequent hot extrusion process, plays a role in heat preservation in the extrusion process, reduces the temperature drop of the high-temperature alloy ingot blank body, and is beneficial to reducing the extrusion resistance; the sheathing tail gasket is added and can be used as extrusion blank residual pressure, so that the waste of powder high-temperature alloy is reduced; meanwhile, the integrated design is adopted to simplify the sheath manufacturing process, reduce the cost and improve the extrusion stability.
Description
Technical Field
The invention belongs to the technical field of powder high-temperature alloy, and relates to an integrated sheath for powder high-temperature alloy powder molding and hot extrusion and a manufacturing method thereof.
Background
Turbine disks are one of the key components of gas turbine engines. The high-speed air flow engine works under severe working conditions, is operated under high temperature, high rotating speed, high stress and high-speed airflow, bears high centrifugal load, thermal load, pneumatic load, vibration load and corrosion and oxidation of environmental media, and is subjected to combined action of mechanical stress of circulation such as starting, accelerating, cruising, decelerating, stopping and the like and thermal stress caused by temperature difference during each flight. Each part of the turbine disk bears different alternating loads, and the working condition of the turbine disk directly influences the service performance, reliability, safety and durability of the engine. With the development of engines with high thrust-weight ratio, high power-weight ratio and high fuel efficiency, higher requirements are put forward on the metallurgical quality, fatigue performance, reliability and durability of the turbine disc.
With the increasing demands of aircraft engines on safety, reliability and long life and the increasing upgrading of manufacturing equipment, the manufacturing process of a turbine disk of a powdered superalloy gradually changes from a direct hot isostatic pressing process (hot isostatic pressing + heat treatment) to a deformation process (hot isostatic pressing + hot extrusion + isothermal forging + heat treatment).
The diameter of the disk of the turbine disk of the turboshaft engine is small, so that the diameter size (phi 130 mm-phi 160mm) of the extrusion bar is limited, the condition of domestic extrusion equipment is comprehensively considered, and the horizontal extrusion is preferably adopted for preparing the extrusion bar for the turboshaft engine turbine disk. The domestic horizontal extrusion equipment for the extrusion with the size is short in resources, the upper limit of the load capacity of the extrusion equipment is close to the extrusion resistance of the powder high-temperature alloy, and great difficulty is brought to the development of the hot extrusion process of the powder high-temperature alloy. In order to effectively reduce the extrusion resistance, a method of increasing a sheath on the surface of a hot isostatic pressing ingot blank is adopted at present, but the hot isostatic pressing ingot blank needs to be processed in a large quantity, and the subsequent increased sheath is easy to have a gap with the hot isostatic pressing ingot blank, but the extrusion resistance is increased due to the fact that gas cannot be removed, and extrusion bar cracking is caused. Meanwhile, the processing of the hot isostatic pressing ingot blank wastes powder high-temperature alloy materials and prolongs the process period.
Disclosure of Invention
The purpose of the invention is: aiming at the technical problems in the prior art, a horizontal extrusion integrated sheath for powder superalloy and a manufacturing method thereof are provided.
In order to solve the technical problem, the technical scheme of the invention is as follows:
on one hand, the invention provides a horizontal extrusion integrated sheath for powder superalloy, which comprises a powder nozzle 1, a sheath upper cover 2, a sheath outer wall 3 and a sheath tail gasket 4, wherein all the parts are made of stainless steel and welded;
the welding groove of the powder nozzle 1 is 45-55 degrees;
the thickness of the upper cover 2 of the sheath is not less than 20mm, and the angle of taper of the sheath is not less than 5 degrees;
the diameter range of the outer wall 3 of the sheath is 225 mm-425 mm, the wall thickness is not less than 13.5mm, and the welding groove is 45-55 degrees;
the thickness of the sheath tail gasket 4 is not less than 115mm, and the welding bevel is 45-55 degrees.
Preferably, 304L stainless steel is used for each part of the sheath.
Preferably, the parts are sheathed and connected by argon arc welding.
The invention also provides a manufacturing method of the horizontal extrusion integrated sheath for the powder superalloy, wherein the manufacturing method comprises the following steps: and the welding of the integrated capsule tail gasket 4 is completed before the hot isostatic pressing, the hot isostatic pressing temperature is not lower than 1100 ℃, the pressure is not less than 140MPa, and the time is not less than 2 h. To achieve and effect diffusion bonding during powder hot isostatic compaction.
After the integrated sheath is welded, vacuum annealing is carried out, so that the tightness of the sheath is ensured, and the sheath is prevented from leaking gas in the processes of powder treatment and hot isostatic pressing; after high-temperature alloy powder is filled in the sheath, hot isostatic pressing densification is carried out, and the head of the sheath is processed into an oblique angle for hot extrusion; preferably, the bevel angle ranges from 40 ° to 50 °.
Preferably, the welded integrated package is annealed in a vacuum annealing furnace at the annealing temperature of 600 ℃ for 12-18 h.
And after the integrated sheath is subjected to vacuum annealing, a leak detector is adopted to carry out tightness inspection on the sheath, and the leak rate is not more than 8 x 10-12mbar.L/s in a vacuum mode.
The size of the powder nozzle 1 is matched with that of powder filling equipment, and preferably, the inner diameter of the powder nozzle 1 is 11mm, and the outer diameter of the powder nozzle is 25 mm.
Preferably, the length of the outer wall 3 of the sheath can be freely adjusted within the range of 600-800 mm.
The invention has the beneficial effects that:
(1) the sheath can be used as a powder forming sheath, and densification is carried out after powder filling is finished; the tail gasket can be used as a sheath of a hot extrusion process in the subsequent process, the temperature drop of the ingot blank in the extrusion transfer process is reduced, the extrusion resistance is reduced, meanwhile, the tail gasket can be used as a discard, the waste of powder high-temperature alloy is reduced, and the cost is saved.
(2) The tail pad of the integrated sheath is welded before hot isostatic pressing, diffusion connection is realized in the hot isostatic pressing densification process along with the powder sheath, the welding strength of the sheath tail pad is enhanced, and the problems that extrusion resistance is increased and bars are cracked due to the existence of gaps between the rear sheath and a high-temperature alloy body are solved. .
(3) The integrated sheath can reduce the processing amount of the high-temperature alloy ingot blank after the hot isostatic pressing, simplify the sheath manufacturing process, shorten the process period, improve the production efficiency and improve the process stability.
(4) The integrated sheath has adjustable size and strong universality, and is suitable for extruding powder high-temperature alloys with different sizes.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the embodiment of the present invention will be briefly explained. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of an integrated jacket structure;
FIG. 2 is a structure diagram of the powder nozzle of the integrated sheath, wherein the angle of a welding groove is 55 degrees, and the length of the welding groove is 5 mm;
fig. 3 is a structure diagram of an upper cover of the integrated sheath, wherein, in the enlarged view of X: the thickness of the upper cover of the packing sleeve is 20 mm; in the enlarged view of Y: the included angle between the upper cover of the packing sleeve and the horizontal line is 5 degrees;
fig. 4 is a structural diagram of an outer wall of an integrated sheath, wherein in an enlarged view of I: the thickness of the outer wall of the sheath is 13.5 mm; in the enlarged view of II: the length of the matching surface of the outer wall of the sheath and the tail gasket is 10mm, and the width of the matching surface of the outer wall of the sheath and the tail gasket is 3.5 mm;
FIG. 5 is a structural diagram of an integrated sheath tail gasket, wherein the thickness of the sheath tail gasket is 115 mm;
wherein, 1-powder nozzle, 2-sheath upper cover, 3-sheath outer wall, 4-sheath tail gasket, the size unit in the figure is mm.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. 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.
Features of various aspects of embodiments of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. The following description of the embodiments is merely intended to better understand the present invention by illustrating examples thereof. The present invention is not limited to any particular arrangement or method provided below, but rather covers all product structures, any modifications, alterations, etc. of the method covered without departing from the spirit of the invention.
In the drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring the present invention. The invention relates to an integrated sheath which comprises a powder nozzle, a sheath upper cover, a sheath outer wall, a sheath tail gasket and the like 4 parts, wherein all the parts are made of 304L stainless steel.
The sheath manufacturing method comprises the following steps:
(1) machining all parts of the integrated sheath according to the drawing size requirement;
(2) cleaning each processed sheathed part by gasoline, and then cleaning by acetone until no visible obvious impurity exists in the acetone;
(3) welding each part of the integrated sheath by adopting argon arc welding;
(4) the welded sheath is subjected to vacuum annealing at the temperature of 600 ℃, and the annealing time is 12-18 h;
(5) after annealing, in order to ensure the sealing performance of the sheath, a leak detector is adopted to carry out sealing performance test on the sheath, so that the gas leakage of the sheath in the processes of powder treatment and hot isostatic pressing is prevented.
(6) After the sheath is filled with high-temperature alloy powder, the hot isostatic pressing densification is carried out, and the head of the sheath is processed into a 45-degree oblique angle for hot extrusion.
Example 1
(1) Processing all parts of the integrated sheath according to a drawing, wherein the diameter of an upper cover of the sheath is phi 343mm, the outer diameter of the outer wall of the sheath is phi 360mm, the inner diameter of the outer wall of the sheath is phi 333mm, the height of the outer wall of the sheath is 730mm, the diameter of a tail gasket of the sheath is phi 360mm, and the height of the tail gasket of the sheath is 100 mm;
(2) cleaning each processed sheathed part by gasoline, and then cleaning by acetone until no visible obvious impurity exists in the acetone;
(3) welding each part of the integrated sheath by adopting argon arc welding;
(4) the welded sheath is subjected to vacuum annealing at the temperature of 600 ℃, and the annealing time is 16 h;
(5) after annealing, in order to ensure the sealing performance of the sheath, a leak detector is adopted to carry out sealing performance test on the sheath, and the leak rate is 3 multiplied by 10 under the vacuum mode-12mbar.L/s；
(6) After high-temperature alloy powder is filled in the sheath, hot isostatic pressing densification is carried out under the conditions of 1100 ℃/150MPa, the head of the sheath is processed into a 45-degree oblique angle, and then a step of (5): 1 extruding to obtain the bar.
Example 2
(1) Processing all parts of the integrated sheath according to a drawing, wherein the diameter of the upper cover of the sheath is phi 403mm, the outer diameter of the outer wall of the sheath is phi 420mm, the inner diameter of the outer wall of the sheath is phi 393mm, the height of the outer wall of the sheath is 620mm, the diameter of the tail gasket of the sheath is phi 420mm, and the height of the tail gasket of the sheath is 150 mm;
(2) cleaning each processed sheathed part by gasoline, and then cleaning by acetone until no visible obvious impurity exists in the acetone;
(3) welding each part of the integrated sheath by adopting argon arc welding;
(4) the welded sheath is subjected to vacuum annealing at the temperature of 600 ℃, and the annealing time is 16 h;
(5) after annealing, in order to ensure the sealing performance of the sheath, a leak detector is adopted to carry out sealing performance test on the sheath, and the leak rate is 5 multiplied by 10 under the vacuum mode-12mbar.L/s；
(6) After the sheath is filled with high-temperature alloy powder, hot isostatic pressing densification is carried out under the condition of 1120 ℃/150MPa, the head of the sheath is processed into a 45-degree oblique angle, and then a step of processing the head of the sheath by a method comprising the following steps of: 1 extruding to obtain the bar.
The invention designs a powder forming and hot extrusion integrated sheath which can be used as a powder forming sheath and is densified after powder filling is finished; the tail gasket can be used as a sheath of a hot extrusion process in the subsequent process, the temperature drop of the ingot blank in the extrusion transfer process is reduced, the extrusion resistance is reduced, meanwhile, the tail gasket can be used as a discard, the waste of powder high-temperature alloy is reduced, and the cost is saved. The integrated sheath can also shorten the process period and improve the production efficiency.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (8)
1. The utility model provides a horizontal extrusion integration canning of powder superalloy which characterized in that: the integrated sheath comprises a powder nozzle (1), a sheath upper cover (2), a sheath outer wall (3) and a sheath tail gasket (4), and all the parts are made of stainless steel and welded;
the welding groove of the powder nozzle (1) is 45-55 degrees;
the thickness of the upper cover (2) of the sheath is not less than 20mm, and the angle of taper of the sheath is not less than 5 degrees;
the diameter range of the outer wall (3) of the sheath is 225 mm-425 mm, the wall thickness is not less than 13.5mm, and the welding groove is 45-55 degrees;
the thickness of the sheath tail gasket (4) is not less than 115mm, and the welding bevel is 45-55 degrees.
2. The horizontal extrusion integrated capsule of powder superalloy as in claim 1, wherein: 304L stainless steel is adopted for all parts of the sheath.
3. The horizontal extrusion integrated capsule of powder superalloy as in claim 1, wherein: all parts of the sheath are connected by argon arc welding.
4. A method of making a horizontal extrusion one-piece capsule of powdered superalloy as in claim 1, comprising: in the manufacturing method, the welding of the integrated capsule tail gasket (4) is completed before the hot isostatic pressing, the hot isostatic pressing temperature is not lower than 1100 ℃, the pressure is not less than 140MPa, and the time is not less than 2 h.
5. The manufacturing method of the horizontal extrusion integrated sheath for the powder superalloy according to claim 4, wherein the manufacturing method comprises the following steps: after the integrated sheath is welded, carrying out vacuum annealing; after the sheath is filled with high-temperature alloy powder, hot isostatic pressing densification is carried out, and the head of the sheath is processed into an oblique angle for hot extrusion.
6. The horizontal extrusion integrated capsule of powder superalloy as in claim 5, wherein: and annealing the welded sheath in a vacuum annealing furnace at 600 ℃ for 12-18 h.
7. The horizontal extrusion integrated capsule of powder superalloy as in claim 5, wherein: after the integrated sheath is subjected to vacuum annealing, leak detector is adopted to carry out leak tightness test on the sheath, and the leak rate is not more than 8 multiplied by 10 under the vacuum mode- 12mbar.L/s。
8. The horizontal extrusion integrated capsule of powder superalloy as in claim 5, wherein: the bevel angle ranges from 40 degrees to 50 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010925790.XA CN112077324A (en) | 2020-09-04 | 2020-09-04 | Horizontal extrusion integrated sheath for powder high-temperature alloy and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010925790.XA CN112077324A (en) | 2020-09-04 | 2020-09-04 | Horizontal extrusion integrated sheath for powder high-temperature alloy and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114273658A (en) * | 2021-12-29 | 2022-04-05 | 北京钢研高纳科技股份有限公司 | Method for hot isostatic pressing treatment of sheath and alloy powder |
| CN115889779A (en) * | 2022-10-25 | 2023-04-04 | 株洲东亚工具有限公司 | Alloy powder pressing bar processing system |
| CN117380956A (en) * | 2023-12-08 | 2024-01-12 | 北京钢研高纳科技股份有限公司 | Low-cost high-homogeneity large-specification powder high-temperature alloy bar and hot extrusion method thereof |
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| CN115889779A (en) * | 2022-10-25 | 2023-04-04 | 株洲东亚工具有限公司 | Alloy powder pressing bar processing system |
| CN117380956A (en) * | 2023-12-08 | 2024-01-12 | 北京钢研高纳科技股份有限公司 | Low-cost high-homogeneity large-specification powder high-temperature alloy bar and hot extrusion method thereof |
| CN117380956B (en) * | 2023-12-08 | 2024-03-12 | 北京钢研高纳科技股份有限公司 | Low-cost high-homogeneity large-specification powder high-temperature alloy bar and hot extrusion method thereof |
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