CN106239036B - A kind of preparation process of sheet porous structural single crystal super alloy part - Google Patents
A kind of preparation process of sheet porous structural single crystal super alloy part Download PDFInfo
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- CN106239036B CN106239036B CN201610601982.9A CN201610601982A CN106239036B CN 106239036 B CN106239036 B CN 106239036B CN 201610601982 A CN201610601982 A CN 201610601982A CN 106239036 B CN106239036 B CN 106239036B
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- 239000013078 crystal Substances 0.000 title claims abstract description 62
- 229910000601 superalloy Inorganic materials 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000000227 grinding Methods 0.000 claims abstract description 23
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 16
- 238000005553 drilling Methods 0.000 claims abstract description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 230000003746 surface roughness Effects 0.000 claims description 8
- 238000010892 electric spark Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 238000003801 milling Methods 0.000 claims description 5
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 5
- 238000001887 electron backscatter diffraction Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000001953 recrystallisation Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007514 turning Methods 0.000 abstract description 2
- 238000009760 electrical discharge machining Methods 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 238000003754 machining Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000024278 histolysis Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/52—Alloys
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B33/00—After-treatment of single crystals or homogeneous polycrystalline material with defined structure
- C30B33/02—Heat treatment
Abstract
The invention discloses a kind of preparation processes of sheet porous structural single crystal super alloy part, belong to high temperature alloy processing technique field.The technique carries out high-temperature heat treatment and medium temperature to single crystal super alloy bar first and is heat-treated, and is then drilled to the bar after heat treatment and slicing treatment, then carries out Low Temperature Heat Treatment, obtains the sheet porous structural single crystal super alloy part.The processes such as turning, grinding, electrical discharge machining, the drilling in flake porous part preparation process and the three-level heat treatment process of single crystal super alloy are carried out reasonable integration by the present invention using unique process route, the problems such as successfully having prepared the part for meeting needs, having effectively prevented recrystallization and part deformation.This method is suitable for manufacture labyrinth monocrystalline part.
Description
Technical field：
The present invention relates to high temperature alloy Parts manufacturing technology fields, and in particular to a kind of sheet porous structural monocrystalline high temperature closes
The preparation process of metal parts.
Background technology：
It is well known that due to not containing crystal boundary and boundary-strengthening element, the high-temperature behavior of single crystal super alloy and use temperature
The relatively common isometric peritectic alloy of degree significantly improves.At present, single crystal super alloy obtains extensive use, work at home in foreign countries
Journeyization, which is promoted, also gradually carries out.As it is a kind of can in high temperature, oxidation, corrosive environment steady operation engineering material, high temperature closes
Gold is widely applied in fields such as the energy, chemical industry, Aeronautics and Astronautics, and the part shape that can be prepared is also of all kinds.And have perhaps
There is more parts unique shape feature not realizing only according to foundry engieering, it is necessary to use various machining means.
But for single crystal super alloy, mach ways and means have to consider it to single crystal alloy sheet
Whether the influence of body structure can cause recrystallization problem, will lead to part rejection if there is recrystallization.At present, needle
It is still immature to the machining technique of labyrinth monocrystalline part, often lead to part deformation or recrystallization problem.Cause
This, there is an urgent need for developing a kind of technique for preparing labyrinth single crystal alloy part, solves to perplex the practical problem of current commercial Application.
Invention content：
In order to solve the problems, such as to lack the effective technique of maturation for preparing complex porous structure single crystal super alloy part at present,
The present invention provides a kind of preparation processes of sheet porous structural single crystal super alloy part, can successfully be prepared using the technique
The problems such as going out complicated sheet porous structural part, effectively preventing recrystallization and part deformation, can be applied to
The preparation of other parts.
The technical scheme is that：
A kind of preparation process of sheet porous structural single crystal super alloy part, the technique is first to single crystal super alloy stick
Material carry out high-temperature heat treatment and medium temperature heat treatment, then drill on bar section after heat treatment, the bar after drilling again into
Row slicing treatment finally carries out Low Temperature Heat Treatment, obtains the sheet porous structural single crystal super alloy part.The technique is specific
Include the following steps：
(1) high-temperature heat treatment and medium temperature heat treatment are carried out successively to single crystal super alloy bar, wherein：At the high warm
It manages and is：1300-1315 DEG C for the treatment of temperature, 4 hours processing times；The medium temperature is heat-treated：1050-1150 DEG C for the treatment of temperature,
4 hours processing times；
(2) bar drills：Outer rim processing is carried out to the bar after step (1) heat treatment using center lathe, turning adds
The industry control depth of cut is not more than 0.05mm；Then it is drilled on bar section using CNC milling machine, boring direction and bar
It is axial consistent, it is cooled down in boring procedure, drilling part position is avoided to overheat；
(3) slicing treatment：Slicing treatment is carried out to bar using electric spark machine tool, bar is cut into thickness
1.1mm sheet samples, sheet sample surface roughness≤0.8 μm of Ra；Sample edge gold is carefully removed using manual grinding mode
Belong to burr, do not allow to destroy part edge shape.
(4) grinding is handled：Grinding processing is carried out to two planes of sheet sample using grinding machine, removes the machine of sample surfaces
Add trace, and sample is made to reach required thickness, the depth of parallelism is not more than 0.01mm, surface roughness≤Ra0.8 μm；It is beaten using manual
Mill mode removes sample edge burr；After sample after adding using acetone to machine carries out ultrasonic cleaning 15min, then carry out step
(5)。
(5) Low Temperature Heat Treatment：Low Temperature Heat Treatment, 870 DEG C for the treatment of temperature, place will be carried out through step (4) treated sample
Time 16-24 hour is managed to get to the sheet porous structural single crystal super alloy part.
In above-mentioned steps (1), the single crystal super alloy bar is prepared using directional solidification technique.
In above-mentioned steps (1), bar axial direction crystal orientation is measured using EBSD technology, it is ensured that be used to prepare part
Its crystal orientation of single crystal super alloy bar and [001] crystal orientation deviation be not more than 15 °.
In the present invention, the single crystal super alloy is nickel-base high-temperature single crystal alloy.
In the present invention, the lamellar spacing of the sheet porous structural single crystal super alloy part is 0.5-2mm.
Design principle of the present invention is as follows：
Pass through high-temperature heat treatment so that the histolysises such as eutectic formed in single crystal super alloy original cast state, simultaneously
The dendritic segregation of alloying element is eliminated as much as, so that materials microstructure and ingredient realize homogenization；At middle warm
For reason so that solid-state phase changes occur in alloy, precipitation precipitation phase improves alloy strength；The effect of Low Temperature Heat Treatment is to make alloy
It is interior that more tiny precipitated phase is precipitated, while so that the precipitated phase being precipitated in medium temperature heat treatment process is further grown up or adjusted
Its size, so as to obtain the higher material of performance.If preceding single crystal alloy passes through at a full set of heat of high temperature, medium temperature, low temperature machine in addition
Reason, then alloy strength significantly improves so that and machine adds process deformation difficult, and inside parts is caused to form larger residual stress, these
Residual stress may lead to the recrystallization during part use.If before machining process is arranged in Low Temperature Heat Treatment,
The strength of materials is relatively low at this time, is easily worked, and inside parts residual stress is relatively low, can to avoid part in Low Temperature Heat Treatment and
Recrystallization problem during later use.
The beneficial effects of the invention are as follows：
1st, the present invention carries out cold-heat treatment processing using machining and three-level heat treatment to single crystal super alloy, obtains excellent
Heterogeneous microstructure, and labyrinth thin-walled parts can be molded.
2nd, the present invention is for the porous labyrinth single crystal super alloy part of thin-walled, at heat treatment reinforcement and machining
The means such as reason, provide brand-new route to prepare Special complex structure single crystal super alloy part, can effectively solve casting side
Method is difficult to the preparation problem of molding monocrystalline part.
Description of the drawings：
Fig. 1 is 1 process program technology path of embodiment.
Fig. 2 prepares sample photo for 1 process program of embodiment.
Fig. 3 is 1 process program technology path of comparative example.
Fig. 4 is the recrystallization that 1 process program of comparative example generates.
Specific embodiment：
The present invention is described in detail with reference to the accompanying drawings and embodiments.
The present invention is the preparation process of sheet porous structural single crystal super alloy part, which is using directional solidification skill
Art prepares complete single crystal super alloy bar, and it is axial to measure bar using EBSD technology by diameter of rod 20mm
Crystal orientation, it is ensured that be used to prepare its crystal orientation of the monocrystalline bar of part and [001] crystal orientation deviation is not more than 15 °.
First, high-temperature heat treatment is carried out to single crystal super alloy bar using high temperature Muffle furnace and medium temperature is heat-treated；Then,
Outer rim processing carries out single crystal super alloy bar using lathe, turnery processing will control the depth of cut to be not more than 0.05mm.Using
CNC milling machine drills in bar section, it should be noted that strengthens cooling, drilling part position is avoided to overheat.
Slicing treatment is carried out to bar using electric spark machine tool, bar is cut into thickness 1.1mm disks, is sliced table
Surface roughness Ra≤0.8 μm.Disk edge metal burr is carefully removed using manual grinding mode, does not allow to destroy part edge
Shape.
Grinding processing carries out disk end face using grinding machine, the machine on removal part end face surface adds trace, and ensure part
Thickness reaches 1mm, and the depth of parallelism is not more than 0.01mm, and surface roughness Ra is 0.8 μm.Circle is carefully removed using manual grinding mode
Piece burrs on edges, the rear part using after acetone adds machine carry out ultrasonic cleaning 15min.
Finally, Low Temperature Heat Treatment is carried out to the part after cleaning to get to required laminated structure single crystal super alloy zero
Part packs the part prepared.
Embodiment 1
The present embodiment is to prepare nickel-base high-temperature single crystal alloy sheet porous structural part, and technological process is as shown in Figure 1.Tool
Body process is as follows：
Nickel-base high-temperature single crystal alloy used is DD408, and main component is (wt.%)：Cr：15.5~16.5%, Co：
8.0~9.0%, W：5.6~6.4%, Al：3.6~4.2%, Ti：3.6~4.2%, Ta：0.7~1.2%, Ni：Surplus.
Single crystal super alloy bar is carried out to high-temperature heat treatment and medium temperature heat treatment successively first, in common high temperature Muffle furnace
Middle progress, wherein：1310 DEG C of the high-temperature heat treatment temperature, 4 hours processing times；1100 DEG C of the medium temperature heat treatment temperature,
4 hours processing times.
The periphery of monocrystalline bar after heat treatment reinforcement carries out turnery processing, and turnery processing will control the depth of cut to be not more than
0.05mm.It is drilled using CNC milling machine in bar section, bore position should be noted that by detail drawing requirement and be strengthened cooling, keep away
Exempt from drilling part position overheat.
Slicing treatment is carried out to bar using electric spark machine tool, bar is cut into thickness 1.1mm disks, is sliced table
Surface roughness Ra is 0.8 μm.Disk edge metal burr is carefully removed using manual grinding mode, does not allow to destroy part edge
Shape.
Grinding processing carries out disk end face using grinding machine, the machine on removal part end face surface adds trace, and ensure part
Thickness reaches 1mm, and the depth of parallelism is not more than 0.01mm, and rough surface Ra is 0.8 μm.Disk is carefully removed using manual grinding mode
Burrs on edges, the rear part using after acetone adds machine carry out ultrasonic cleaning 15min.
Part after machining carries out Low Temperature Heat Treatment, and heat treatment process carries out in vacuum heat treatment furnace, avoids part
Oxidation.870 DEG C of Low Temperature Heat Treatment temperature, 20 hours processing times.
Flake porous part manufactured in the present embodiment recrystallizes problem as shown in Fig. 2, not occurring edge in use,
Fully meet requirement.
Comparative example 1
This example is to prepare nickel-base high-temperature single crystal alloy DD408 sheet porous structural parts, and technological process is as shown in Figure 3.
Difference from Example 1 is as follows：
Single crystal super alloy bar is subjected to heat treatment reinforcement first.Heat treatment carries out in high temperature Muffle furnace, is heat-treated
It is divided into tertiary treatment, is followed successively by high-temperature heat treatment, medium temperature heat treatment and Low Temperature Heat Treatment, wherein：The high-temperature heat treatment temperature
1310 DEG C, 4 hours processing times；1100 DEG C of the medium temperature heat treatment temperature, 4 hours processing times；The Low Temperature Heat Treatment temperature
870 DEG C of degree, 20 hours processing times.
The periphery of monocrystalline bar after heat treatment reinforcement carries out turnery processing, and turnery processing will control the depth of cut to be not more than
0.05mm.It is drilled using CNC milling machine in bar section, bore position should be noted that by detail drawing requirement and be strengthened cooling, keep away
Exempt from drilling part position overheat.
Slicing treatment is carried out to bar using electric spark machine tool, bar is cut into thickness 1.1mm disks, is sliced table
Surface roughness Ra is 0.8 μm.Disk edge metal burr is carefully removed using manual grinding mode, does not allow to destroy part edge
Shape.
Grinding processing carries out disk end face using grinding machine, the machine on removal part end face surface adds trace, and ensure part
Thickness reaches 1mm, and the depth of parallelism is not more than 0.01mm, and rough surface Ra is 0.8 μm.Disk is carefully removed using manual grinding mode
Burrs on edges, the rear part using after acetone adds machine carry out ultrasonic cleaning 15min.
There is edge recrystallization problem (Fig. 4) in use in flake porous part prepared by this example, this is due to machine
There are a large amount of internal stress to cause for inside parts after processing.
Claims (6)
1. a kind of preparation process of sheet porous structural single crystal super alloy part, it is characterised in that：The technique is first to monocrystalline
High temperature alloy bar carries out high-temperature heat treatment and medium temperature heat treatment, then drills on bar section after heat treatment, after drilling
Bar carry out slicing treatment again, finally carry out Low Temperature Heat Treatment, obtain the sheet porous structural single crystal super alloy part；
The technique includes the following steps：
(1) high-temperature heat treatment and medium temperature heat treatment are carried out successively to single crystal super alloy bar, wherein：The high-temperature heat treatment
For：1300-1315 DEG C for the treatment of temperature, 4 hours processing times；The medium temperature is heat-treated：1050-1150 DEG C for the treatment of temperature, place
Manage 4 hours time；
(2) bar drills：Outer rim processing, turnery processing control are carried out to the bar after step (1) heat treatment using center lathe
The depth of cut processed is not more than 0.05mm；Then it is drilled on bar section using CNC milling machine, boring direction is axial with bar
Unanimously；
(3) slicing treatment：Slicing treatment is carried out to bar using electric spark machine tool, bar is cut into thickness 1.1mm pieces
Shape sample, sheet sample surface roughness≤0.8 μm of Ra；Sample edge metal burr is removed using manual grinding mode；
(4) grinding is handled：Grinding processing is carried out to two planes of sheet sample using grinding machine, the machine for removing sample surfaces adds trace
Mark, and sample is made to reach required thickness, the depth of parallelism is not more than 0.01mm, surface roughness≤Ra0.8 μm；Using manual grinding side
Formula removes sample edge burr；
(5) Low Temperature Heat Treatment：It will carry out Low Temperature Heat Treatment through step (4) treated sample, 870 DEG C for the treatment of temperature, during processing
Between 16-24 hours to get to the sheet porous structural single crystal super alloy part.
2. the preparation process of sheet porous structural single crystal super alloy part according to claim 1, it is characterised in that：Step
Suddenly in (1), the single crystal super alloy bar is prepared using directional solidification technique.
3. the preparation process of sheet porous structural single crystal super alloy part according to claim 1, it is characterised in that：Step
Suddenly in (1), bar axial direction crystal orientation is measured using EBSD technology, it is ensured that be used to prepare the single crystal super alloy of part
Its crystal orientation of bar and [001] crystal orientation deviation are not more than 15 °.
4. the preparation process of sheet porous structural single crystal super alloy part according to claim 1, it is characterised in that：Step
Suddenly after (4) grinding processing, the sample after being added using acetone to machine carries out ultrasonic cleaning 15min, then carries out low temperature to sample again
Heat treatment.
5. the preparation process of sheet porous structural single crystal super alloy part according to claim 1, it is characterised in that：Institute
Single crystal super alloy is stated as nickel-base high-temperature single crystal alloy.
6. the preparation process of sheet porous structural single crystal super alloy part according to claim 1, it is characterised in that：Institute
The lamellar spacing for stating sheet porous structural single crystal super alloy part is 0.5-2mm.
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| CN107119325B (en) * | 2017-06-26 | 2019-03-12 | 中国科学院金属研究所 | A method of eliminating laser 3D printing single crystal super alloy recrystallization tendency |
| CN112894263A (en) * | 2019-12-04 | 2021-06-04 | 杨庆增 | Method for machining the surface of a rotating part |
| CN113399696A (en) * | 2021-07-01 | 2021-09-17 | 西北工业大学 | Ultrasonic vibration assisted drilling machining method for DD6 single crystal superalloy difficult to machine |
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|---|---|---|---|---|
| US3536121A (en) * | 1965-05-27 | 1970-10-27 | United Aircraft Corp | Process for producing single crystal metallic alloy objects |
| US4392894A (en) * | 1980-08-11 | 1983-07-12 | United Technologies Corporation | Superalloy properties through stress modified gamma prime morphology |
| CN101905250A (en) * | 2010-05-31 | 2010-12-08 | 周家镳 | Chipless forming method for gear stick and section gear through hot extrusion |
| CN102108555A (en) * | 2009-12-23 | 2011-06-29 | 中国科学院金属研究所 | High-temperature perfect oxidation resistance type nickel-based single-crystal alloy and preparation method thereof |
| CN103866392A (en) * | 2014-01-24 | 2014-06-18 | 南京理工大学 | Low rhenium and nickel-based single crystal high-temperature alloy and preparation method thereof |
| CN103966671A (en) * | 2014-03-31 | 2014-08-06 | 中国科学院金属研究所 | High-strength hot-corrosion-resistant Ni-based single crystal superalloy and preparation method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013143995A1 (en) * | 2012-03-27 | 2013-10-03 | Alstom Technology Ltd | Method for manufacturing components made of single crystal (sx) or directionally solidified (ds) nickelbase superalloys |
-
2016
- 2016-07-28 CN CN201610601982.9A patent/CN106239036B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3536121A (en) * | 1965-05-27 | 1970-10-27 | United Aircraft Corp | Process for producing single crystal metallic alloy objects |
| US4392894A (en) * | 1980-08-11 | 1983-07-12 | United Technologies Corporation | Superalloy properties through stress modified gamma prime morphology |
| CN102108555A (en) * | 2009-12-23 | 2011-06-29 | 中国科学院金属研究所 | High-temperature perfect oxidation resistance type nickel-based single-crystal alloy and preparation method thereof |
| CN101905250A (en) * | 2010-05-31 | 2010-12-08 | 周家镳 | Chipless forming method for gear stick and section gear through hot extrusion |
| CN103866392A (en) * | 2014-01-24 | 2014-06-18 | 南京理工大学 | Low rhenium and nickel-based single crystal high-temperature alloy and preparation method thereof |
| CN103966671A (en) * | 2014-03-31 | 2014-08-06 | 中国科学院金属研究所 | High-strength hot-corrosion-resistant Ni-based single crystal superalloy and preparation method |
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Effective date of registration: 20210804 Address after: 110172 block C12, south of Shendong Sixth Road, west of Zhongxing Street, Shenfu new area, Shenyang City, Liaoning Province Patentee after: Liaoning Hongyin Metal Co.,Ltd. Address before: 110016 No. 72, Wenhua Road, Shenhe District, Liaoning, Shenyang Patentee before: INSTITUTE OF METAL RESEARCH CHINESE ACADEMY OF SCIENCES |
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Denomination of invention: Preparation process of sheet porous structure single crystal superalloy parts Effective date of registration: 20220225 Granted publication date: 20180703 Pledgee: Fushun Bank Co.,Ltd. Development Zone sub branch Pledgor: Liaoning Hongyin Metal Co.,Ltd. Registration number: Y2022210000012 |