CN113996751A - Method for refining local structure grains by titanium alloy precision casting - Google Patents
Method for refining local structure grains by titanium alloy precision casting Download PDFInfo
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- CN113996751A CN113996751A CN202111191933.XA CN202111191933A CN113996751A CN 113996751 A CN113996751 A CN 113996751A CN 202111191933 A CN202111191933 A CN 202111191933A CN 113996751 A CN113996751 A CN 113996751A
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- 238000000034 method Methods 0.000 title claims abstract description 64
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 39
- 238000005495 investment casting Methods 0.000 title claims abstract description 25
- 238000007670 refining Methods 0.000 title claims abstract description 13
- 238000007711 solidification Methods 0.000 claims abstract description 37
- 230000008023 solidification Effects 0.000 claims abstract description 37
- 230000008569 process Effects 0.000 claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 26
- 239000010439 graphite Substances 0.000 claims abstract description 26
- 239000002002 slurry Substances 0.000 claims abstract description 15
- 239000000919 ceramic Substances 0.000 claims abstract description 12
- 239000002131 composite material Substances 0.000 claims abstract description 8
- 238000004088 simulation Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 238000003723 Smelting Methods 0.000 claims abstract description 5
- 238000010791 quenching Methods 0.000 claims abstract description 4
- 230000000171 quenching effect Effects 0.000 claims abstract description 4
- 238000004458 analytical method Methods 0.000 claims abstract description 3
- 238000005266 casting Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 14
- 230000000295 complement effect Effects 0.000 claims description 5
- 238000010146 3D printing Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 3
- 238000007790 scraping Methods 0.000 abstract 1
- 239000011257 shell material Substances 0.000 description 43
- 239000000047 product Substances 0.000 description 20
- 238000004364 calculation method Methods 0.000 description 8
- 239000013078 crystal Substances 0.000 description 8
- 239000012071 phase Substances 0.000 description 8
- 239000000956 alloy Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 230000008719 thickening Effects 0.000 description 5
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- 238000009434 installation Methods 0.000 description 4
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- 238000010899 nucleation Methods 0.000 description 3
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
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- 230000008439 repair process Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
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- 238000010981 drying operation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 238000005058 metal casting Methods 0.000 description 1
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- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010112 shell-mould casting Methods 0.000 description 1
- 210000003625 skull Anatomy 0.000 description 1
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- 238000004781 supercooling Methods 0.000 description 1
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- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a method for refining grains of a titanium alloy precision casting local structure. The method comprises the steps of firstly carrying out numerical simulation analysis on the solidification process of a target product, determining the final solidification region, establishing a three-dimensional model of a conformal quenching block in the region, further preparing a rapid forming component and a graphite component with the same shape, then carrying out precision casting on the titanium alloy by taking the target product as a prototype, bonding the rapid forming component at the corresponding position of a wax mould of the target product in the mould making process, scraping slurry near the rapid forming component in the shell making process, after roasting is finished, putting the graphite component into a cavity left after the rapid forming component is removed, sealing the joint by the slurry to obtain a graphite-inlaid ceramic composite shell, and then carrying out smelting and pouring on the titanium alloy. The invention accelerates the solidification speed of the thick and large structure of the product by virtue of the chilling action of the graphite, and plays a role in refining local structure grains.
Description
Technical Field
The invention belongs to the technical field of titanium alloy precision casting, and particularly relates to a method for refining local structure grains in titanium alloy precision casting.
Background
The titanium alloy precision casting is to adopt a precision investment casting process method to carry out the procedures of wax mold preparation, shell preparation, dewaxing, roasting and the like to obtain a ceramic mold shell with a specific inner cavity, then pour liquid titanium alloy into the mold shell, and obtain a metal casting product after solidification. The microstructure of the titanium alloy casting is generally a transformation beta structure formed by cooling from a high-temperature beta region, and the typical microstructure of the cast alpha and near alpha type titanium alloy and the microstructure of the alpha + beta type maintain the original beta grain boundary, and the grain boundary is composed of needle-shaped or sheet-shaped and net-basket-shaped alpha structures. Taking the best-used ZTC4 alloy material for titanium alloy precision casting as an example, the liquidus temperature of the alloy is 1650 ℃, the solidus temperature is 1600 ℃, in the process of liquid metal solidification, the ZTC4 alloy firstly precipitates beta phase in the liquid phase to form beta single-phase alloy, when the temperature is reduced to the phase transition temperature of 975-1005 ℃, the beta phase is transformed to alpha + beta phase, the residual beta phase is gathered at the original beta phase grain boundary, the inside is flaky alpha phase, and the beta phase usually exists in the structure of Weishi.
Titanium alloy precision castings generally have the problem of coarse and large area structure grains. The titanium alloy precision casting usually adopts a ceramic shell with an yttria surface layer and a bauxite back layer, the shell has low thermal conductivity and poor heat dissipation capability, so that the solidification speed of thick and large areas is slow, original beta grains grow up, and large-size original beta grain boundaries are reserved when the shell is cooled to room temperature, so that local structure grains are large. For example, when the thickness of the structure exceeds 10mm, the average diameter of the original beta grains of the ZTC4 alloy may exceed 3 mm. Research shows that the size of titanium alloy grains has a negative correlation with mechanical properties such as tensile strength, yield strength and the like, and the large texture grains can cause the reduction of the mechanical properties of the titanium alloy and reduce the service indexes of titanium alloy castings.
The methods of adding alterant, mechanical vibration and accelerating the cooling rate are the common titanium alloy structure grain refining method. The addition of modifiers such as boride to the alloy can increase the solidification nucleation point of the liquid titanium alloy, but the method is easy to introduce impurity elements into the alloy and is not suitable for products with high requirements on chemical components. The mechanical vibration promotes the crystal nucleus to be formed in advance by inputting energy from the outside, and increases the nucleation number, but the mechanical vibration has high requirement on the casting strength, and the precision casting shell is easy to break due to the over-high vibration frequency, so the practicability is lower. The cooling rate is accelerated, the supercooling degree of liquid metal can be increased, the nucleation rate is increased, argon is introduced into a furnace, the shell thickness is reduced or the shell material is changed, the cooling rate can be accelerated, but the conventional methods only can integrally refine crystal grains, can not realize local controllable crystal grain refinement, can bring about the casting problems of fire running, insufficient pouring and the like, and reduce the casting qualified rate.
Disclosure of Invention
In view of the above-mentioned situation of the prior art, the present invention aims to provide a method for refining grains of a titanium alloy precision casting local structure, so as to solve the problems of slow heat dissipation and coarse local grains of a titanium alloy precision casting shell.
The technical scheme of the invention is as follows: a method for refining local structure grains in titanium alloy precision casting comprises the following steps:
firstly, carrying out numerical simulation analysis on the solidification process of a target product to determine a final solidification region;
extracting the determined final solidification region through three-dimensional modeling, and establishing a three-dimensional model of the conformal cooling block, wherein the shape of the conformal cooling block is complementary with the extracted final solidification region;
preparing rapid forming components and graphite components with the same shape by using the three-dimensional model of the conformal cooling block;
and carrying out titanium alloy precision casting by taking a target product as a prototype, in the mold making process, bonding the wax mold component at a corresponding position of a wax mold of the target product, wherein the corresponding position is a complementary surface of the final solidification region and the conformal quenching block, in the shell making process, removing slurry near the rapid forming component to expose the outer side surface of the rapid forming component until the shell making process is completed, after roasting is completed, putting the graphite component into a cavity left after the rapid forming component is removed to obtain a graphite-embedded ceramic composite shell, and then carrying out smelting and pouring of the titanium alloy.
The invention accelerates the solidification speed of the thick and large structure of the product by virtue of the chilling action of the graphite, plays a role of refining local structure grains, has flexible position selection and adjustable area size, and is suitable for titanium alloy precision casting products with various shapes.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a schematic view illustrating a shell mold set after a shell manufacturing process is completed according to an embodiment of the present invention;
fig. 3 is a sectional view taken along line a-a of fig. 2.
In the figure: 1-target product wax mould, 2-final solidification region, 3-rapid forming component and 4-ceramic shell
Detailed Description
For a clearer understanding of the objects, technical solutions and advantages of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
The invention provides a method for refining local structure grains in titanium alloy precision casting, which comprises the following steps:
(1) the method comprises the steps of introducing a three-dimensional model of a target product into numerical simulation software (such as ProCAST or Hua-cast CAE), then carrying out pretreatment operation of casting solidification simulation, wherein the pretreatment operation comprises the operation steps of geometric restoration, grid division, material parameter setting, boundary condition setting, calculation parameter setting and the like, submitting operation calculation after all the operation steps are finished, calling a post-treatment module after the calculation is finished, selecting solidification time in a result column, displaying the solidification time of each part of a casting through a cloud picture display method and a slicing display method, and determining a plurality of final solidification regions of the casting, wherein the final solidification region refers to a region with the longest solidification time.
(2) The method comprises the steps of introducing a three-dimensional digital model of a target product into CAD modeling software, utilizing a segmentation tool to extract a final solidification region of a casting, marking the outer surface of the casting with different colors, selecting a thickening command, performing thickening operation on the outer surface marked with the colors to obtain a thickened entity, and trimming the outer side surface of the thickened entity into a plane to obtain a three-dimensional model of the conformal cooling block and additionally store the three-dimensional model as an independent model file. In this step, the thickness setting range in the thickening operation is 15mm to 30 mm.
(3) The three-dimensional model file of the conformal quenching block is utilized to prepare a rapid prototyping component and a graphite component which are the same in shape, the rapid prototyping component can be prepared by adopting processes such as 3D printing and the like, the preparation material is SLA or SLS, the graphite component is generally prepared by adopting a machining method, and the preparation material of the graphite component is electrode graphite with the ash content of 0.3 percent by mass. The difference in the dimensions of the rapid prototyping member and the graphite member is preferably controlled to be within ± 0.5 mm.
(4) The titanium alloy precision casting process with the target product as the prototype includes the steps of molding, shell making, dewaxing, roasting, casting, shell cleaning and other steps. In the mould making procedure, after the contact surface is coated with adhesive wax, the rapid forming component is adhered to the corresponding position of the wax mould of the target product, the corresponding position is the complementary surface of the final solidification area and the conformal chilling block, and the seam is sealed by repair wax. In the shell making process, after the slurry spraying and sanding operation of each layer is completed, the slurry and sand near the rapid prototyping component are removed, and the outer side surface of the rapid prototyping component is exposed in the air until the shell making process is completed. And when the dewaxing and roasting processes are finished, removing the target product wax mold and the rapid forming component to form a ceramic shell with an inner cavity, putting the graphite component into a cavity left after the rapid forming component is removed, sealing a joint by slurry (the slurry is composed of bauxite powder and silica sol in a mass ratio of 2-4: 1), and putting the slurry into a 300 ℃ oven for heat preservation for 4-8 hours to obtain the graphite-inlaid ceramic composite shell. And smelting and pouring the titanium alloy by using the composite shell, obtaining a target product titanium alloy casting after a shell cleaning process, and refining the structure crystal grains in the final solidification region.
Referring to fig. 1 to 3, wherein fig. 1 is a flow chart of the method of the present invention, fig. 2 is a schematic view showing a shell mold set after completion of a shell-making process in an example, and fig. 3 is a cross-sectional view taken along line a-a of fig. 2, a specific example of the method of the present invention for grain refinement of a titanium alloy precision casting local structure is as follows:
(1) the target product is an annular member, the annular member is composed of an annular surface and 8 mounting sections which are distributed on the outer side at equal intervals, the wall thickness of the annular surface is 3mm, the mounting sections are stepped, and the maximum wall thickness is 20 mm.
(2) Importing the three-dimensional model of the annular member into ProCAST numerical simulation software; checking and repairing the integrity of the three-dimensional model until the software shows a qualified result; setting the side length of the grid dimension to be 3mm, dividing the three-dimensional model into surface grids, and checking and repairing the surface grids until the surface grids are displayed to be qualified; selecting the surface mesh of the model, setting the thickness to be 15mm, carrying out cladding operation to generate a shell surface mesh, and checking and repairing the surface mesh until the surface mesh is qualified; clicking a dividing grid button to generate a body grid, and finishing grid division; switching to a CAST module, and setting the gravity direction to be vertically downward along the central axis of the ring surface; setting a metal domain material as ZTC4 titanium alloy, and setting a Shell material as Shell bonded sand; the heat exchange coefficient of the metal-shell interface is set to be 600W/(m.K), and the environmental heat dissipation coefficient is set to be 20W/(m.K)2K) ambient temperature 25 ℃; setting a calculation mode to only carry out solidification heat transfer calculation, executing simulation parameters according to default parameters, and finishing the simulation pretreatment.
(3) Clicking an operation button, submitting simulation operation calculation, executing the calculation process in a background, calling a visualization module after the calculation is finished, selecting and hiding the shell part, selecting the solidification time in a result column, displaying the solidification time of each part by a cloud picture display and slice display method, wherein the solidification time of the installation joints is longest and reaches 90s, the solidification time of the ring surface position is 10s, and determining the final solidification region 2 of the casting to be 8 installation joints.
(4) Leading the three-dimensional digital model of the annular member into UG software, extracting 8 installation sections by using a segmentation tool, marking the surface of the inner side of each installation section in red, selecting a thickening command, performing thickening operation on the outer surface marked in red, setting the thickness to be 15mm, obtaining a stepped thickened entity, filling the inner hole of the thickened entity, and trimming the outer side surface into a plane to obtain a three-dimensional model of the conformal cooling block and additionally store the three-dimensional model as an independent model file.
(5) And preparing 8 SLS rapid prototyping members 3 by using the three-dimensional model file of the conformal cooling block and adopting a 3D printing process.
(6) And preparing a graphite component by using the three-dimensional model file of the conformal cooling block and adopting a machining method, wherein the graphite component and the rapid forming component have the same shape, and the size difference is controlled within the range of +/-0.5 mm.
(7) The titanium alloy precision casting process with the annular member as the model prototype includes the steps of molding, shell making, dewaxing, roasting, casting, shell cleaning and the like.
(8) In the mould making process, a product mould is placed on a working table top of a 50t wax pressing machine, an annular component wax mould 1 is pressed, adhesive wax is smeared on the outer side surface of the mounting section, the rapid forming component is adhered on the outer side surface of the mounting section, and the seam is sealed by repair wax. And bonding the annular member wax mold at a fixed position of a pouring system to finish a mold making process.
(9) In the shell making process, the slurry pouring, sanding and drying operations are repeatedly carried out on the annular component wax mold 1 and the pouring system for 13 times, after each layer of slurry pouring and sanding operations are completed, slurry and sand near the rapid forming component are manually scraped, the outer side face of the rapid forming component is exposed in the air until the shell making process is completed, and the shell molding module of the annular component is obtained.
(10) And putting the shell module into an electric dewaxing furnace for dewaxing operation, wherein the dewaxing temperature is 200 ℃, and the dewaxing time is 3 hours. And after dewaxing, transferring the shell module to an electric roasting furnace for roasting at 1000 ℃ for 12 hours. And after dewaxing and roasting processes are finished, removing the annular member wax mold and the rapid forming member to obtain a ceramic shell 4 with an inner cavity, putting the graphite member into a cavity left after the rapid forming member is removed, sealing a joint by slurry, and putting the graphite member into a 300 ℃ oven for heat preservation for 4-8 hours to obtain the graphite-inlaid ceramic composite shell.
(11) And putting the composite shell into a 100kg vacuum consumable skull furnace for carrying out smelting and pouring operation of the titanium alloy, removing the shell from the furnace after pouring, obtaining a target product titanium alloy casting after a shell cleaning process, and refining the structure crystal grains in the final solidification region.
The invention adopts a numerical simulation method of the solidification process, accurately determines the thickness position of a product, defines a high risk area with thick and large structure in the product, accurately places a conformal graphite block at a target thickness position by designing a novel graphite-embedded ceramic composite shell, and accelerates the local solidification rate by utilizing the chilling action of graphite, thereby realizing the local structure crystal grains of a titanium alloy precision casting product. The method solves the problems of slow heat dissipation and coarse local crystal grains of the titanium alloy precision casting shell, the position and the shape of the graphite block can be flexibly adjusted, the graphite block can be basically placed at any casting opening position and special-shaped structure, and the tissue crystal grains of a plurality of positions can be simultaneously refined.
Claims (8)
1. A method for refining local structure grains in titanium alloy precision casting comprises the following steps:
firstly, carrying out numerical simulation analysis on the solidification process of a target product to determine a final solidification region;
extracting the determined final solidification region through three-dimensional modeling, and establishing a three-dimensional model of the conformal cooling block, wherein the shape of the conformal cooling block is complementary with the extracted final solidification region;
preparing rapid forming components and graphite components with the same shape by using the three-dimensional model of the conformal cooling block;
and carrying out titanium alloy precision casting by taking a target product as a prototype, in the mold making process, bonding the wax mold component at a corresponding position of a wax mold of the target product, wherein the corresponding position is a complementary surface of the final solidification region and the conformal quenching block, in the shell making process, removing slurry near the rapid forming component to expose the outer side surface of the rapid forming component until the shell making process is completed, after roasting is completed, placing the graphite component into a cavity left after the rapid forming component is removed, sealing the joint to obtain a graphite-embedded ceramic composite shell, and then carrying out smelting and casting on the titanium alloy.
2. The method of claim 1, wherein the rapid prototyping member is prepared using 3D printing.
3. The method of claim 2, wherein the rapid-form member is made of SLA or SLS.
4. The method as set forth in claim 1, wherein the graphite member is made of electrode graphite having an ash content of 0.3% by mass.
5. The method according to claim 1, wherein the sealing joint is performed by using slurry, and the slurry is prepared from the following components in a mass ratio of 2-4: 1, and silica sol.
6. The method of claim 5, further comprising holding the ceramic shell at 300 ℃ for 4 to 8 hours after sealing the joint.
7. The method of claim 1, wherein the difference in size between the rapid prototyping member and the graphite member is controlled to be within ± 0.5 mm.
8. The method of claim 1, wherein the graphite member is prepared by a machining process.
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| CN202111191933.XA CN113996751A (en) | 2021-10-13 | 2021-10-13 | Method for refining local structure grains by titanium alloy precision casting |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63168250A (en) * | 1987-01-05 | 1988-07-12 | Kobe Steel Ltd | Locally cooling method for lost-wax casting |
| CN201922016U (en) * | 2010-12-10 | 2011-08-10 | 四川简阳海特有限公司 | Natural-shape graphite chilling block |
| CN103071765A (en) * | 2012-12-27 | 2013-05-01 | 清华大学 | Partial air cooling method for precast aperture passage in investment casting shell |
| CN103192027A (en) * | 2013-03-28 | 2013-07-10 | 清华大学 | Partial cooling method of cold iron in investment casting |
| CN103978156A (en) * | 2014-03-04 | 2014-08-13 | 清华大学 | Method for controlling coagulation and cooling of investment castings |
| CN105750499A (en) * | 2016-04-21 | 2016-07-13 | 清华大学 | Method of utilizing conformal cold iron and forced convection to locally cool investment casting |
| CN105964991A (en) * | 2016-05-23 | 2016-09-28 | 西北工业大学 | Directional solidification method capable of eliminating spots in casting |
| CN109877276A (en) * | 2019-03-12 | 2019-06-14 | 北京百慕航材高科技有限公司 | The shell preparation method in the thick big region in the part of model casting part |
| CN111451446A (en) * | 2020-05-13 | 2020-07-28 | 中国航发北京航空材料研究院 | Method for manufacturing TiAl series intermetallic compound precision casting shell observation hole |
-
2021
- 2021-10-13 CN CN202111191933.XA patent/CN113996751A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63168250A (en) * | 1987-01-05 | 1988-07-12 | Kobe Steel Ltd | Locally cooling method for lost-wax casting |
| CN201922016U (en) * | 2010-12-10 | 2011-08-10 | 四川简阳海特有限公司 | Natural-shape graphite chilling block |
| CN103071765A (en) * | 2012-12-27 | 2013-05-01 | 清华大学 | Partial air cooling method for precast aperture passage in investment casting shell |
| CN103192027A (en) * | 2013-03-28 | 2013-07-10 | 清华大学 | Partial cooling method of cold iron in investment casting |
| CN103978156A (en) * | 2014-03-04 | 2014-08-13 | 清华大学 | Method for controlling coagulation and cooling of investment castings |
| CN105750499A (en) * | 2016-04-21 | 2016-07-13 | 清华大学 | Method of utilizing conformal cold iron and forced convection to locally cool investment casting |
| CN105964991A (en) * | 2016-05-23 | 2016-09-28 | 西北工业大学 | Directional solidification method capable of eliminating spots in casting |
| CN109877276A (en) * | 2019-03-12 | 2019-06-14 | 北京百慕航材高科技有限公司 | The shell preparation method in the thick big region in the part of model casting part |
| CN111451446A (en) * | 2020-05-13 | 2020-07-28 | 中国航发北京航空材料研究院 | Method for manufacturing TiAl series intermetallic compound precision casting shell observation hole |
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