CN110083927A - It is a kind of for controlling the integrated cast design method of single crystal blade listrium stray crystal - Google Patents
It is a kind of for controlling the integrated cast design method of single crystal blade listrium stray crystal Download PDFInfo
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- CN110083927A CN110083927A CN201910334129.9A CN201910334129A CN110083927A CN 110083927 A CN110083927 A CN 110083927A CN 201910334129 A CN201910334129 A CN 201910334129A CN 110083927 A CN110083927 A CN 110083927A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Abstract
The invention discloses a kind of integrated cast design preparation methods for controlling single crystal blade listrium stray crystal, belong to materials processing technology field, the technical solution of the present invention is as follows: passing through the computer-experimental analysis model for establishing numerical simulation, the thermo parameters method for analyzing blade listrium position in orientation process, obtains the local overcooling region of listrium position in process of setting；Increase baffle arrangement in blade position, delay the external heat radiation in listrium prominent position, to avoid listrium edge from generating stray crystal due to the local overcooling forming core that is very fast and generating that radiates, it finally carries out casting mold using the type core based on 3D printing technique/shell integrated technique quickly to prepare, obtaining, there is the single crystal blade casting mold of baffle arrangement to be poured for directional solidification.Present aspect is suitable for the preparation of the various sizes of single crystal blade of gas turbine, can effectively avoid blade edge Board position stray crystal defect from generating, improve the casting qualification rate of single crystal blade.
Description
Technical field
The invention belongs to gas turbine single crystal blades to fabricate field, be related to a kind of miscellaneous for controlling single crystal blade listrium
Brilliant integrated cast design method.
Background technique
Nickel base superalloy due to its outstanding creep resistance and high-temperature oxidation resistance, be widely used in aero-engine and
The production of turbo blade in industry gas turbine.It can manufacture using directional solidification processes with columnar grain and mono-crystalline structures
Casting.Since single crystal super alloy blade completely eliminates crystal boundary, the high temperature creep property and fatigue behaviour of blade are improved, at
For the first choice for manufacturing high-performance aeroengine.
One of the main problem encountered in the directional solidification process of single crystal turbine blade at present is exactly listrium prominent position
It will form stray crystal.In blade listrium part, since cross-sectional area is mutated casting on vertical heat flow direction, since prominent position is molten
New crystal grain easy to form is subcooled in body.The crystal boundary of these stray crystals will become the weak link of single crystal blade, can develop into use
For formation of crack, the fracture failure of blade is eventually led to.
Rapid shaping technique (3D printing) is the multidisciplinary development such as a kind of fuse information technology, material technology, manufacturing technology
The advanced manufacturing technology got up successively is accumulated molding manufacture entity component by material, had to the near-net-shape of complex parts
Huge advantage, while also new space is provided for the labyrinth manufacture of inside parts.Wherein photocureable rapid shaping is to work as
Preceding maturity is higher, a kind of ideal rapid shaping technique of precision.It is realized using the flexible rolling of increases material manufacturing technology
Type core/shell integration system is standby, effectively avoids the system that traditional model casting has hollow structure complex parts in preparation
The manufacturing process for making a series of complex of process, while guaranteeing that comprehensive performance is met the requirements, when greatly reducing manufacture
Between and cost, be that there is a revolutionary new technology, have very big market value.
Currently, listrium stray crystal defect control method mainly passes through control directional solidification in single crystal blade directional solidification process
Technological parameter in the process, including cast temperature, withdrawing rate, this method are limited to the control of monocrystal blades from having mixed crystal defects, and
And experience is relied primarily on, there is certain blindness.
Summary of the invention
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide one kind for controlling single crystal blade edge
The integrated cast design method of plate stray crystal, this method can reduce the number of technological experiment, effectively avoid stray crystal defect, improve
Single crystal blade qualification rate.
In order to achieve the above object, the present invention is achieved by the following scheme:
The invention discloses a kind of for controlling the integrated cast design method of single crystal blade listrium stray crystal, including following
Step:
1) according to a group threedimensional model for mould design casting system, including casting, blade casting mold and furnace wall and aqueous cold plate mould
Type；
2) sliding-model control is carried out to the threedimensional model of step 1) design, establishes finite element analysis model, complete simulation ginseng
Number design, and carry out numerical simulation calculation；
3) pass through the Comparative result calibrated analog parameter of key point thermometric experimental result and step 2) numerical simulation calculation；
4) according to the analog parameter after step 3) calibration, casting mold baffle arrangement is added on the blade casting mold based on step 1),
Replacement step 1) in blade casting mold threedimensional model, establish simulation model；
5) by the data result of the replaced threedimensional model of step 4) and simulation model import numerical Simulation Analysis System into
Row calculates analysis, casting mold baffle arrangement is modified again according to calculated result feedback, until obtaining the casting mold baffle arrangement of optimization；
6) resin die design is carried out to the casting mold baffle arrangement of step 5) optimization and manufactured；
7) it completes to have casting mold baffle knot by the type core based on photocuring 3D printing technique/shell integral preparation process
It is prepared by the single crystal blade ceramic-mould of structure.
Preferably, it in step 1), according to a group threedimensional model for mould design casting system, specifically includes:
According to the original blade model data design technology structure of casting, including monocrystalline crystal selector, group mould number, arrangement side
Formula and dead head, wall thickness casting mold, aqueous cold plate and the protecting wall structure threedimensional model such as design on the basis of cast model, by institute
There is model to assemble by physical constraint relationship.
Preferably, in step 2), sliding-model control is carried out to the threedimensional model of step 1) design, establishes finite element analysis mould
Type, concrete operations are as follows:
By based on casting, design etc. wall thickness casting mold and simplify after protecting wall structure import Finite Element Simulation Software after, it is right
Threedimensional model carries out tetrahedral discretization grid discrete processes, obtains the discretization data model of analysis；
According to the basic parameter of simulation, simulation meter is carried out to directional solidification process by Computer Numerical Simulation software
It calculates, and extracts temperature measuring point temperature variation curve；
Wherein, the basic parameter of the simulation includes preheating temperature, cast temperature, drawing velocity, the coefficient of heat conduction, spoke
Penetrate the thermal physical property parameter of the coefficient of heat transfer and material therefor.
It is further preferred that described tested by key point thermometric of step 3) is joined with simulation calculated result comparison calibration simulation
Number, the specific method is as follows:
According to the basic parameter of simulation, simulation meter is carried out to directional solidification process by Computer Numerical Simulation software
It calculates, in situation identical with the basic parameter condition of simulation, passes through the practical reality for being poured each temperature measuring point of the real time measure
Temperature variation data, and each thermometric point data obtained with numerical simulation compares and analyzes；Adjustment heat transfer as needed
Coefficient and radiation heat transfer coefficient adjustment meet the requirements until relative temperature error, using this parameter as numerical simulation calculation after calibrating
Basic parameter.
Preferably, in step 4), the design method of casting mold baffle arrangement is as follows:
According to position of the casting mold in directional solidification furnace and group mould mode, based on the simulation calculated result after calibration parameter,
In casting mold baffle of the position envisaged underneath for local overcooling region occur based on casting mold profile, it is cold that casting mold baffle can satisfy reduction
Radiation of the area to local overcooling region, and meet the preparation condition of monoblock type casting mold simultaneously.
Preferably, in step 5), replaced threedimensional model and simulation model data result are imported into numerical simulation analysis
System, carrying out calculating analysis feedback modification casting mold baffle arrangement, the specific method is as follows:
The modeling of casting mold baffle design is carried out according to position of the casting mold in directional solidification furnace and radiation condition, is imported after the completion
Numerical simulation software is calculated, and analysis blade local overcooling Isolated Melting Zone whether there is, and if it exists, then adjusts radiation casting mold baffle
Size and shape until local overcooling Isolated Melting Zone disappear after, save revised file.
Preferably, in step 6), the tool of resin die design and manufacture is carried out to the casting mold baffle arrangement of step 5) optimization
Body method is as follows:
The design that casting mold baffle arrangement adjusted is carried out to castable resin mold by Three-dimensional Design Software, makes its satisfaction
The requirement of photocurable quick shaping process and Gel-casting process completes tree by high-precision Stereolithography machine after the completion of design
The quick manufacture of rouge mold.
Preferably, in step 7), the type core based on photocuring 3D printing technique/shell integral preparation process completes band casting
Prepared by the single crystal blade ceramic-mould of type baffle arrangement, specifically include:
By the alumina powder gel injection-moulding after grain composition, then by being made after freeze-drying, degreasing, high temperature sintering
The monoblock type ceramic-mould made completes the manufacture of single crystal blade using the casting mold after optimization.
Compared with prior art, the invention has the following advantages:
Listrium stray crystal be single crystal blade it is most common be also most important defect, listrium stray crystal generate the main reason for be due to
The heat radiation of blade position is compared faster in listrium edge, since local overcooling forming core causes stray crystal to generate.The present invention is by establishing number
It is worth computer-experimental analysis model of simulation, analyzes the thermo parameters method of blade listrium position in orientation process, solidified
Casting mold baffle arrangement is added in blade position, and rationally designs the knot of casting mold baffle in the local overcooling region of listrium position in journey
Structure size can reach the temperature field of listrium position in control directional solidification process, prevent the generation of local overcooling, avoid listrium
The generation of position stray crystal defect finally carries out casting mold using the type core based on 3D printing technique/shell integrated technique and quickly makes
Standby, obtaining, there is the single crystal blade casting mold of casting mold baffle arrangement to be poured for directional solidification.Method of the invention is kept off due to casting mold
The addition of hardened structure, can effectively heat radiation of the stop edge edges of boards edge to water-cooling ring, to ensure that listrium in directional solidification process
Position horizontal temperature field it is uniform, the single crystal blade of high quality can be generated.Meanwhile the present invention uses shell type core integration system
Technique is made, can flexibly change type shell structure be designed, the integrated shell manufacture with baffle arrangement is rapidly completed.The present invention is applicable in
In the preparation of the various sizes of single crystal blade of gas turbine, blade edge Board position stray crystal defect can effectively be avoided to generate, improved single
The casting qualification rate of brilliant blade.
Detailed description of the invention
Fig. 1 is the overall flow figure of the method for the present invention；
Fig. 2 is casting mold baffle technique structural schematic diagram in directional solidification furnace, wherein (a) is that casting mold baffle technique is directed to
The mould group casting mold of small size blade；(b) casting mold of large-scale blades is directed to for casting mold baffle technique；
Fig. 3 is the schematic diagram of casting mold baffle arrangement design；Wherein, (a) is schematic diagram of the casting mold baffle in molding position,
It (b) is casting mold baffle exterior contour schematic diagram；
Fig. 4 is influence schematic diagram of the casting mold baffle to listrium temperature change.
Wherein: 1- casting mold baffle；2- listrium；3- monocrystalline；4- stray crystal.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that term " includes " and " having " and their any deformation, it is intended that covering is non-exclusive
Include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to clearly arrange
Those of out step or unit, but may include be not clearly listed or it is solid for these process, methods, product or equipment
The other step or units having.
The invention will be described in further detail with reference to the accompanying drawing:
It is disclosed by the invention a kind of for controlling the integrated cast design method of single crystal blade listrium stray crystal referring to Fig. 1,
Include the following steps:
1) according to a group threedimensional model for mould design casting system, including casting, blade casting mold and furnace wall and aqueous cold plate mould
Type；
2) discretization three-dimension modeling finite element analysis model completes analog parameter design, and carries out numerical simulation meter
It calculates；
3) it tests by key point thermometric and simulates the Comparative result calibrated analog parameter calculated；
4) casting mold baffle arrangement is added on blade casting mold, is replaced the threedimensional model of blade casting mold, is established simulation model；
5) it imports numerical Simulation Analysis System and carries out calculating analysis, thoroughly do away with calculated result feedback, modify casting mold baffle again
Structure；
6) resin die design is carried out to modified casting mold baffle arrangement and manufactured；
7) it completes to have casting mold baffle knot by the type core based on photocuring 3D printing technique/shell integral preparation process
Prepared by the single crystal blade ceramic-mould of structure, complete single crystal blade casting.
Embodiment 1
A method of single crystal blade listrium stray crystal is controlled by integrated cast design, comprising the following steps:
1) casting system threedimensional model, including casting, casting mold and simplified furnace wall and water are designed according to blade construction
Cold dish model
Firstly, spiral crystal selector is designed using NX modeling software, after spiral crystal selector and blade tip seamlessly transit, according to
The size of aqueous cold plate, complete gang mould number and position are put, it is desirable that are had good radiating condition between each blade, completed leaf
After arrangement of the piece on aqueous cold plate, the design that entire cast model is completed after the dead head and runner design of casting is designed.It is based on
Cast model designs casting mold model, it is desirable that controls the uniform wall thickness of 6-7mm；Apparatus for directional solidification is finally completed according to actual size
The foundation of internal furnace wall model.
2) discretization three-dimension modeling FEM Simulation model, basic analog parameter design
By based on casting, design etc. wall thickness casting mold and simplify after protecting wall structure import PROCAST finite element modelling it is soft
After part, tetrahedral discretization grid discrete processes are carried out to threedimensional model, the discretization data model of analysis are obtained, according to simulation
Basic parameter carries out simulation calculating to directional solidification process by Computer Numerical Simulation software, and extracts temperature measuring point temperature
Spend change curve；
Wherein, the basic parameter of the simulation includes casting mold preheating temperature, cast temperature, drawing velocity, heat transfer system
The thermal physical property parameter of number, radiation heat transfer coefficient and material therefor；Shown in table 1 specific as follows:
The basic parameter of 1 simulation of table
3) experiment of key point thermometric and simulation calculated result comparison calibration analog parameter
According to the basic parameter of simulation, simulation meter is carried out to directional solidification process by Computer Numerical Simulation software
It calculates, in situation identical with the basic parameter condition, passes through the practical actual temperature for being poured each temperature measuring point of the real time measure
Delta data, and each thermometric point data obtained with numerical simulation compares and analyzes；If any one temperature measuring point is relatively warm
It spends error and is greater than 10%, select and need to adjust the coefficient of heat conduction and radiation heat transfer coefficient adjustment until relative temperature error conforms to
It asks, using the basic parameter of this parameter numerical simulation calculation as after calibrating.
4) casting mold baffle design Modeling and Design
Referring to Fig. 3, according to position of the casting mold in directional solidification furnace and group mould mode, based on the simulation after calibration parameter
It calculates the results show that occurring below the position in local overcooling region, baffle of the design based on casting mold profile, blade casting mold baffle arrangement
It is the circumferential baffle (as shown in Figure 3) of blade casting mold blade position increase by one on casting mold apart from listrium 5-10mm, passes through barrier
Radiation of the cold-zone to listrium reduces the melt undercooling at blade listrium, achievees the effect that inhibit stray crystal, horizontal profile and listrium
Similar, original dimension is radially beyond listrium 10mm, with a thickness of 3-5mm.It is required that baffle, which can satisfy, reduces cold-zone to part
The radiation in region is subcooled, while meeting the preparation condition of monoblock type casting mold.
5) numerical Simulation Analysis System is imported to carry out calculating analysis feedback modification baffle arrangement
The modeling of casting mold baffle design, the design of baffle are carried out according to position of the casting mold in directional solidification furnace and radiation condition
Method is mainly in view of the influence that radiation changes casting mold, imports numerical simulation software after the completion and is calculated, analyzes blade edge
Local overcooling Isolated Melting Zone whether there is at plate, and if it exists, the size and shape for then adjusting radiation baffle, until local overcooling is isolated
After domain disappears, revised file is saved.Fig. 4 is shown in influence of the casting mold baffle technique to local overcooling Isolated Melting Zone at blade listrium,
In Fig. 4 the left side indicate to be not added with the casting mold of casting mold baffle during directional solidification listrium wedge angle since degree of supercooling is greater than liquid gold
The forming core of category is subcooled and generates stray crystal, can control the shape of freezing interface after the right expression addition casting mold baffle, reaches elimination
Or reduce the effect of stray crystal.
5) modified casting mold structure carries out resin die design and manufactures
Casting mold adjusted is carried out to the design of castable resin mold by Three-dimensional Design Software, it is desirable that it is solid to can satisfy light
Change the requirement of quick shaping process and Gel-casting process, resin mold is completed by high-precision Stereolithography machine after the completion of design
The quick manufacture of tool；STL format is converted to by designed resin die threedimensional model using UG three-dimensional modeling, is used
Magics software is sliced to model layers and adds support processing.It is rapid-result fastly to import SPS600 photocuring for data after Magics is handled
The quick fabrication schedule of type machine carries out the preparation of blade light-cured resin mold.Fall surface liquid residual resin simultaneously with alcohol washes
Removal support, merging ultraviolet curing case obtain the resin die of casting mold after further solidifying.
6) monoblock type Casting mold manufacturing technique completes complete blade casting after the preparation of monoblock type casting mold
The ceramic slurry of configuration is poured among single crystal blade resin mould, solidification entity is freeze-dried, pre-burning
Degreasing, high temperature sintering process obtain final ceramic shell entity；The ceramic shell entity of acquisition is put into vacuum oriented solidification to pour
It infuses in furnace, withdrawing rate is using withdrawing rate technique is become, and initial withdrawing rate is 3mm/min, when casting mold baffle and directional solidification
When insulating equipment baffle level, withdrawing rate reduces to 1mm/min, until completing.It is solidifying that monocrystalline orientation is carried out by directional solidification furnace
Gu casting, obtains single crystal blade of the listrium without stray crystal defect.
The present invention by establishing computer-experimental analysis model of numerical simulation, analyzes blade edge in orientation process first
The thermo parameters method of Board position obtains the local overcooling region of listrium position in process of setting；Increase baffle knot in blade position
Structure delays the external heat radiation in listrium prominent position, to avoid listrium edge due to the local overcooling shape that is very fast and generating that radiates
Core generates stray crystal, finally carries out casting mold using the type core based on 3D printing technique/shell integrated technique and quickly prepares, is had
There is the single crystal blade casting mold of baffle arrangement to be poured for directional solidification.Present aspect is suitable for the various sizes of monocrystalline leaf of gas turbine
The preparation of piece can effectively avoid blade edge Board position stray crystal defect from generating, improve the casting qualification rate of single crystal blade.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (8)
1. a kind of for controlling the integrated cast design method of single crystal blade listrium stray crystal, which is characterized in that including following step
It is rapid:
1) according to a group threedimensional model for mould design casting system, including casting, blade casting mold and furnace wall and aqueous cold plate model；
2) sliding-model control is carried out to the threedimensional model of step 1) design, establishes finite element analysis model, completed analog parameter and set
Meter, and carry out numerical simulation calculation；
3) pass through the Comparative result calibrated analog parameter of key point thermometric experimental result and step 2) numerical simulation calculation；
4) according to the analog parameter after step 3) calibration, casting mold baffle arrangement, replacement are added on the blade casting mold based on step 1)
The threedimensional model of blade casting mold, establishes simulation model in step 1)；
5) data result of the replaced threedimensional model of step 4) and simulation model importing numerical Simulation Analysis System is counted
Point counting analysis modifies casting mold baffle arrangement according to calculated result feedback, until obtaining the casting mold baffle arrangement of optimization again；
6) resin die design is carried out to the casting mold baffle arrangement of step 5) optimization and manufactured；
7) it is completed by the type core based on photocuring 3D printing technique/shell integral preparation process with casting mold baffle arrangement
The preparation of single crystal blade ceramic-mould.
2. according to claim 1 for controlling the integrated cast design method of single crystal blade listrium stray crystal, feature
It is, in step 1), according to a group threedimensional model for mould design casting system, specifically includes:
According to the original blade model data design technology structure of casting, including monocrystalline crystal selector, group mould number, arrangement mode with
And dead head, wall thickness casting mold, aqueous cold plate and the protecting wall structure threedimensional model such as design on the basis of cast model, by all moulds
Type is assembled by physical constraint relationship.
3. according to claim 2 for controlling the integrated cast design method of single crystal blade listrium stray crystal, feature
It is, in step 2), sliding-model control is carried out to the threedimensional model of step 1) design, establishes finite element analysis model, it is specific to grasp
Make as follows:
By based on casting, design etc. wall thickness casting mold and simplify after protecting wall structure import Finite Element Simulation Software after, to three-dimensional
Model carries out tetrahedral discretization grid discrete processes, obtains the discretization data model of analysis；
According to the basic parameter of simulation, simulation calculating is carried out to directional solidification process by Computer Numerical Simulation software, and
Extract temperature measuring point temperature variation curve；
Wherein, the basic parameter of the simulation includes that preheating temperature, cast temperature, drawing velocity, the coefficient of heat conduction, radiation are changed
The thermal physical property parameter of hot coefficient and material therefor.
4. according to claim 3 for controlling the integrated cast design method of single crystal blade listrium stray crystal, feature
It is, step 3) is described to be tested by key point thermometric and simulate calculated result comparison calibration analog parameter, and the specific method is as follows:
According to the basic parameter of simulation, simulation calculating is carried out to directional solidification process by Computer Numerical Simulation software,
In situation identical with the basic parameter condition of simulation, become by the practical actual temperature for being poured each temperature measuring point of the real time measure
Change data, and each thermometric point data obtained with numerical simulation compares and analyzes；As needed adjustment the coefficient of heat conduction and
Radiation heat transfer coefficient adjustment meets the requirements until relative temperature error, using this parameter as after calibrating numerical simulation calculation it is basic
Parameter.
5. according to claim 1 for controlling the integrated cast design method of single crystal blade listrium stray crystal, feature
It is, in step 4), the design method of casting mold baffle arrangement is as follows:
Gone out according to position of the casting mold in directional solidification furnace and group mould mode based on the simulation calculated result after calibration parameter
For the position envisaged underneath in existing local overcooling region based on the casting mold baffle of casting mold profile, casting mold baffle, which can satisfy, reduces cold-zone pair
The radiation in local overcooling region, and meet the preparation condition of monoblock type casting mold simultaneously.
6. according to claim 1 for controlling the integrated cast design method of single crystal blade listrium stray crystal, feature
It is, in step 5), replaced threedimensional model and simulation model data result is imported into numerical Simulation Analysis System, counted
The specific method is as follows for point counting analysis feedback modification casting mold baffle arrangement:
The modeling of casting mold baffle design is carried out according to position of the casting mold in directional solidification furnace and radiation condition, imports numerical value after the completion
Simulation softward is calculated, and analysis blade local overcooling Isolated Melting Zone whether there is, and if it exists, then adjusts the big of radiation casting mold baffle
Small and shape saves revised file until after the disappearance of local overcooling Isolated Melting Zone.
7. according to claim 1 for controlling the integrated cast design method of single crystal blade listrium stray crystal, feature
It is, in step 6), the specific method is as follows for the progress resin die design of casting mold baffle arrangement and manufactures that optimize to step 5):
The design that casting mold baffle arrangement adjusted is carried out to castable resin mold by Three-dimensional Design Software makes it meet light solid
Change the requirement of quick shaping process and Gel-casting process, resin mold is completed by high-precision Stereolithography machine after the completion of design
The quick manufacture of tool.
8. according to claim 1 for controlling the integrated cast design method of single crystal blade listrium stray crystal, feature
It is, in step 7), the type core based on photocuring 3D printing technique/shell integral preparation process completes band casting mold baffle arrangement
Single crystal blade ceramic-mould preparation, specifically include:
By the alumina powder gel injection-moulding after grain composition, then by freeze-drying, degreasing, manufacture after high temperature sintering
Monoblock type ceramic-mould completes the manufacture of single crystal blade using the casting mold after optimization.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333669A (en) * | 2021-04-27 | 2021-09-03 | 中国科学院金属研究所 | Rapid preparation method of single crystal blade |
| CN115047160A (en) * | 2022-04-28 | 2022-09-13 | 上海交通大学 | Device and method for evaluating casting performance of single crystal high-temperature alloy |
| CN115047160B (en) * | 2022-04-28 | 2023-11-03 | 上海交通大学 | Device and method for evaluating casting performance of monocrystal superalloy |
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