CN105598390A - Hollow blade ceramic mold and core removal method thereof - Google Patents
Hollow blade ceramic mold and core removal method thereof Download PDFInfo
- Publication number
- CN105598390A CN105598390A CN201610049505.6A CN201610049505A CN105598390A CN 105598390 A CN105598390 A CN 105598390A CN 201610049505 A CN201610049505 A CN 201610049505A CN 105598390 A CN105598390 A CN 105598390A
- Authority
- CN
- China
- Prior art keywords
- core
- ceramic
- blade
- depoling
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
Abstract
The invention discloses a hollow blade ceramic mold and a core removal method thereof. The ceramic mold comprises a mold shell and a blade prototype fixed into the mold shell. Ceramic slurry is poured into an inner cavity of the mold shell. A plurality of core bars are distributed into the ceramic slurry. A prepositioning device for fixing the core bars is arranged on the mold shell. Each core bar is composed of a corrosion resistance core portion and a corrosive cladding layer wrapping the corrosion resistance core portion. The core removal method of the ceramic mold sequentially comprises the steps that the core bars are prepared, the core bars are installed inside the mold shell in a positioned mode, the ceramic slurry is poured into the inner cavity of the mold shell with the blade prototype, and the core bars are wrapped by the ceramic slurry; the outer-layer mold shell is taken out after molding, and the blade with a ceramic mold core is manufactured; finally, the blade containing the ceramic mold core is removed; when the corrosive cladding layers on the surfaces of the core bars are corroded completely, the corrosion resistance core portions are taken out, and core removal continues to be performed on the blade till the ceramic mold core is removed completely. The core bars can enhance the strength of the mold core, and the reaction rate is increased during core removal.
Description
Technical field
The invention belongs to hollow turbine vane processing and manufacturing field, be specifically related to a kind of hollow blade ceramic-mould and depoling method thereof.
Background technology
High temperature alloy Ceramic Core for Hollow Blades must have good chemical stability and high-temperature creep resistance, conventional potteryPorcelain core mainly contains two kinds of silica-based and alumina bases. The chemical stability of alumina based ceramic core is better, and serviceability temperature moreHeight, reaches as high as 1850 DEG C, has the coefficient of expansion matching with alumina-based ceramic shell, is more suitable for large scale directional vaneProduction. Aluminium oxide is difficult to react with soda acid depoling liquid, therefore ceramic core deviate from very difficultly, it removes technology is restrictionThe large bottleneck that alumina based ceramic core uses.
At present, both at home and abroad the influence factor of the depoling speed of research mainly contains the content of porosity, additive and distribution, batch mixing workSkill three aspects:. And for porosity, the larger depoling performance of porosity is better, but porosity increase can directly cause coreThe reduction of intensity, intensity is too low will press the wax-pattern stage or under the impact of molten metal, rupture in casting cycle. So holeRate is difficult for excessive, and general control is between 35%～50%.
Goal of the invention
The object of the invention is to for above-mentioned defect of the prior art, provide under a kind of prerequisite that can require in proof strength,Effectively improve hollow blade ceramic-mould and the depoling method thereof of depoling speed.
To achieve these goals, the technical scheme that hollow blade ceramic-mould of the present invention adopts is:
Comprise shell and be fixed on the paddle prototype in shell, in the inner chamber of shell, be perfused with ceramic size; Described ceramic slurryIn material, distribute and be provided with some arbor rods, on shell, be provided with the arbor rod device for pre-positioning for fixing arbor rod; DescribedArbor rod is by anticorrosive core and be wrapped in the outer field perishable coating of anticorrosive core and form; Described perishable coating is by corruptionAfter eating away, between anticorrosive core and ceramic core, produce space, anticorrosive core can be extracted along this space, in ceramic mouldIn core, form through hole, increased the contact area of ceramic core and depoling liquid.
Described anticorrosive core is made up of aluminium oxide or zirconia.
Described perishable coating is made up of silica, magnesia or calcium oxide.
Described depoling liquid adopts the potassium hydroxide solution that concentration is 30-70wt%.
Shell upper opening, arbor rod device for pre-positioning is the bridge plate being overlapped on opening, has arbor rod and pass hole on bridge plate.
Described shell and paddle prototype are all printed and are prepared from by 3D.
The volume ratio that described arbor rod occupies in investment shell intracavity is 5%～10%.
The technical scheme that hollow blade ceramic-mould depoling method of the present invention adopts, comprises the following steps:
1) prepare arbor rod;
First make anticorrosive core, then deposit perishable coating in anticorrosive core surface;
2) interspersed arbor rod;
Arbor rod device for pre-positioning is set on shell, by arbor rod location and installation in shell inside;
3) prepare casting mold and blade;
Pour into ceramic size to having in the investment shell intracavity of paddle prototype, arbor rod is coated in ceramic size; After moulding,Remove outer field shell, prepare the blade casting mold that contains ceramic core, after super-dry, sintering and casting of metals, prepare and containThe metal blade of ceramic core;
4) blade depoling;
Use corrosive liquid to carry out depoling to the blade that contains ceramic core, when the perishable coating on arbor rod surface has corroded when complete,Anticorrosive core is taken out, then blade is continued to depoling, until that ceramic core removes is complete.
Described anticorrosive core diameters scope is 0.1mm～0.8mm, and length is 10mm～30mm; Described perishable coatingThickness range be 0.2mm～0.3mm; Deposition process adopts chemical vapour deposition technique or sol-gel coating method.
Blade is put into high pressure depoling still and carry out depoling, the temperature of depoling liquid is 200-350 DEG C, and still internal pressure is 5MPa-25MPa,When the perishable coating on arbor rod surface has corroded when complete, anticorrosive core is taken out, then blade is put into high pressure depoling still and continueContinuous depoling, detects by X ray, until that ceramic core removes is complete.
Compared with prior art, casting mold of the present invention has increased the through-hole rate of hollow turbine vane greatly, has accelerated hollow turbine vaneDepoling speed, ceramic-mould inside is more easily removed. The perishable coating of arbor rod not with anticorrosive core and paddle prototypeReaction, when depoling perishable coating can with the fast reaction of depoling liquid, after perishable coating is corroded, anticorrosive core and potteryBetween porcelain core, produce space, anticorrosive core can be extracted along this space, and then at the penetrating vestibule of the inner formation of core, containsWhen the core in penetrating hole carries out depoling processing, penetrate into depoling liquid in penetrating hole, depoling liquid and core can increase contact-making surface like thisLong-pending, improve the speed of reaction, accelerate reaction rate, provide a kind of new method and approach for solving hollow turbine vane depoling.
Compared with prior art, depoling method of the present invention arranges arbor rod in ceramic size, arbor rod outside deposition is high temperature resistant,Perishable coating, in depoling process, after the outside perishable coating of arbor rod is corroded, anticorrosive core and ceramic coreBetween produce space, anticorrosive core can be extracted along this space, increases the contact area of ceramic core and depoling liquid, causes de-Core liquid infiltration capacity increases, and accelerates the corrosion to core, thereby improves the depoling speed of hollow turbine vane. The method can increaseThe corrosion rate of ceramic core, the existence of arbor rod simultaneously can reduce the deformation of creep amount of casting mold, in blade casting process,The intensity that increases ceramic core, prevents deformation, and the method has obvious technical advantage in speeding-up blade depoling speed.
Further, depoling method of the present invention is in the time that high pressure depoling still carries out depoling, and the temperature of depoling liquid is 200-350 DEG C, in stillPressure is 5MPa-25MPa, has corroded completely through the perishable coating on 4～5 hours arbors rod surface, and anticorrosive core is gotGo out, then blade is put into high pressure depoling still and continue depoling, through approximately 20 hours, detect by X ray, ceramic core is de-Except complete. As can be seen here, the depoling time of application the method is short, and depoling efficiency is high.
Brief description of the drawings
Fig. 1 hollow turbine vane casting mold of the present invention mold integral schematic diagram (containing arbor rod);
Fig. 2 hollow turbine vane casting mold of the present invention mould inside half sectional view (containing arbor rod);
Fig. 3 arbor rod of the present invention decomposition texture schematic diagram;
Half sectional view after Fig. 4 hollow turbine vane ceramic core casting of the present invention slurry;
In accompanying drawing: 1-shell; 2-paddle prototype; 3-arbor rod; 4-arbor rod device for pre-positioning; The perishable coating of 5-; The anti-corruption of 6-Erosion core; 7-ceramic size.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Referring to Fig. 1-4, hollow blade ceramic-mould of the present invention comprises shell 1 and is fixed on the paddle prototype 2 of 1 li of shell,In the inner chamber of shell 1, be perfused with ceramic size 7. In ceramic size 7, distribute and be provided with some arbor rods 3, the top of shell 1Opening, arbor rod device for pre-positioning 4, for being overlapped on the bridge plate on opening, offers the hole that passes of arbor rod 3, arbor on bridge plateRod 3 is suspended on arbor rod device for pre-positioning 4 and is bolted. Arbor rod 3 is by anticorrosive core 6 and be wrapped in anti-The outer field perishable coating 5 of corrosion core 6 forms, and anticorrosive core 6 is made up of aluminium oxide or zirconia, perishable coating 5Be made up of silica, magnesia or calcium oxide, depoling liquid adopts the potassium hydroxide solution that concentration is 50wt%. Shell 1 and bladePrototype 2 is all adopted and is made of resin, and the volume ratio that arbor rod 3 occupies in shell 1 inner chamber is 5%～10%.
Depoling method of the present invention mainly comprises the following steps, and first carries out hollow turbine vane monoblock type colophony prototype mould CADDesign, adopt 3D printing technique photocuring to prepare fast shell 1 and be fixed on the paddle prototype 2 of 1 li of shell; Then systemMake arbor rod 3, manufacture on the core material surface corrosion-resistant, mechanical behavior under high temperature is good the coating that is easy to corrosion, for castingFirm and the depoling of type; Before cast core, arbor rod 3 is inserted into shell 1 cavity by arbor rod device for pre-positioning 4Among and be fixed, arbor rod 3 occupies ratio and is controlled at 5%～10%, ensures the ceramic core stability in when casting; SecondlyPrepare ceramic size 7, ceramic size 7 is filled in shell 1, ceramic size 7 is solidified, in freeze-drier, carry out coldFreeze-drying is dry, successively carries out the processes such as cooling curing, distillation and parsing-desiccation; Adopt common roaster to monoblock type ceramic-mould baseBody colophony prototype carries out sintering, to leave " hole " cast hollow turbine vane foundry goods. Make pottery through Ludox maceration extract intensive treatmentPorcelain casting mold; Finally ceramic-mould is carried out the operations such as sintering, obtain casting mold; To the high-temperature liquid metal cooling of casting in casting mold; ?After blade put into high pressure depoling still carry out depoling, the temperature of depoling liquid is 250 DEG C, still internal pressure is 7MPa, through 4～5Hour corrode when complete when the perishable coating 5 on arbor rod 3 surfaces, anticorrosive core 6 has been taken out, then blade is put into heightPressure-off core still continues depoling, through approximately 20 hours, detects by X ray, until that ceramic core removes is complete.
The present invention can increase the through-hole rate of hollow turbine vane greatly, accelerates the depoling speed of hollow turbine vane, makes ceramic mouldCore more easily removes. In the method, the outside coating material of arbor rod 3 does not react with core material, casting mold matrix material. De-When core, arbor rod 3 outside coating can with hot alkaline solution fast reaction, after corrosion of coating, between forming between ceramic rod and casting moldGap, is convenient to arbor rod 3 to take out, and then at the penetrating vestibule of the inner formation of core. Carry out depoling place at the core that contains penetrating holeWhen reason, penetrate into depoling liquid in penetrating hole, corrosive liquid and core can enlarge active surfaces like this, improved the speed of reaction.
Claims (10)
1. a hollow blade ceramic-mould, is characterized in that: comprise shell (1) and be fixed on the inner blade of shell (1)Prototype (2), is perfused with ceramic size (7) in the inner chamber of shell (1); Described ceramic size (7) is if middle distribution is provided withDry root arbor rod (3), is provided with the arbor rod device for pre-positioning (4) for fixing arbor rod (3) on shell (1); DescribedArbor rod (3) by anticorrosive core (6) and be wrapped in the outer field perishable coating of anticorrosive core (6) (5) and form;After described perishable coating (5) is corroded, between anticorrosive core (6) and ceramic core, produce space, anticorrosiveCore (6) can be extracted along this space, forms through hole in ceramic core, has increased the contact area of ceramic core and depoling liquid.
2. hollow blade ceramic-mould according to claim 1, is characterized in that: described anticorrosive core (6) is by oxygenChanging aluminium or zirconia makes.
3. hollow blade ceramic-mould according to claim 1 and 2, is characterized in that: described perishable coating (5)Made by silica, magnesia or calcium oxide.
4. hollow blade ceramic-mould according to claim 3, is characterized in that: described depoling liquid adopts concentration to beThe potassium hydroxide solution of 30-70wt%.
5. hollow blade ceramic-mould according to claim 1, is characterized in that: described shell (1) upper opening,Arbor rod device for pre-positioning (4), for being overlapped on the bridge plate on opening, has arbor rod (3) and passes hole on bridge plate.
6. hollow blade ceramic-mould according to claim 1, is characterized in that: described shell (1) and blade are formerType (2) is all printed and is prepared from by 3D.
7. hollow blade ceramic-mould according to claim 1, is characterized in that: described arbor rod (3) is in shell (1)The volume ratio occupying in inner chamber is 5%～10%.
8. a hollow blade ceramic-mould depoling method, is characterized in that, comprises the following steps:
1) prepare arbor rod (3);
First make anticorrosive core (6), then at the perishable coating of anticorrosive core (6) surface deposition (5);
2) interspersed arbor rod (3);
Arbor rod device for pre-positioning (4) is set on shell (1), by arbor rod (3) location and installation in shell (1) inside;
3) prepare casting mold and blade;
Pour into ceramic size (7) to having in shell (1) inner chamber of paddle prototype (2), make arbor rod (3) be coated on potteryIn porcelain slurry (7); After moulding, remove outer field shell (1), prepare the blade casting mold that contains ceramic core, through overdryingAfter dry, sintering and casting of metals, prepare the metal blade containing ceramic core;
4) blade depoling;
Use corrosive liquid to carry out depoling to the blade that contains ceramic core, when the perishable coating (5) on arbor rod (3) surfaceCorrode when complete, anticorrosive core (6) is taken out, then blade is continued to depoling, until that ceramic core removes is complete.
9. hollow blade ceramic-mould depoling method according to claim 8, is characterized in that: described anticorrosive core (6)Diameter range is 0.1mm～0.8mm, and length is 10mm～30mm; The thickness range of described perishable coating (5) is0.2mm～0.3mm; Deposition process adopts chemical vapour deposition technique or sol-gel coating method.
10. hollow blade ceramic-mould depoling method according to claim 8, is characterized in that: described blade is put into high pressureDepoling still carries out depoling, and the temperature of depoling liquid is 200-350 DEG C, and still internal pressure is 5MPa-25MPa, when arbor rod (3) tableThe perishable coating (5) of face has corroded when complete, anticorrosive core (6) is taken out, then blade is put into high pressure depoling still and continueContinuous depoling, detects by X ray, until that ceramic core removes is complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610049505.6A CN105598390B (en) | 2016-01-25 | 2016-01-25 | A kind of hollow blade ceramic-mould and its depoling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610049505.6A CN105598390B (en) | 2016-01-25 | 2016-01-25 | A kind of hollow blade ceramic-mould and its depoling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105598390A true CN105598390A (en) | 2016-05-25 |
| CN105598390B CN105598390B (en) | 2017-12-08 |
Family
ID=55979026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610049505.6A Active CN105598390B (en) | 2016-01-25 | 2016-01-25 | A kind of hollow blade ceramic-mould and its depoling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105598390B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152313A (en) * | 2017-06-13 | 2017-09-12 | 西安交通大学 | A kind of steam turbine last stage hollow blade based on 3d printings and preparation method thereof |
| CN108015224A (en) * | 2017-12-11 | 2018-05-11 | 株洲中航动力精密铸造有限公司 | Hollow Blade Wax patterns drawing method |
| CN109279875A (en) * | 2018-08-24 | 2019-01-29 | 清华大学 | The preparation method of ceramic mould |
| CN109351912A (en) * | 2018-11-20 | 2019-02-19 | 安徽应流航源动力科技有限公司 | One kind is for adjusting engine blade ceramic core positioning mold and localization method |
| CN110369676A (en) * | 2018-04-12 | 2019-10-25 | 杨成武 | A method of making hollow mold |
| CN110483087A (en) * | 2019-09-16 | 2019-11-22 | 郑州航空工业管理学院 | Turbine blade of gas turbine hot investment casting alumina based ceramic core manufacturing method |
| CN112427625A (en) * | 2020-11-12 | 2021-03-02 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for removing ceramic core for blade with integral casting cover plate structure |
| CN113333670A (en) * | 2021-05-25 | 2021-09-03 | 贵州安吉航空精密铸造有限责任公司 | Preparation method of wax mould with built-in cavity |
| CN114249588A (en) * | 2021-12-28 | 2022-03-29 | 沈阳铸造研究所有限公司 | Silica-based ceramic core for large-size directional hollow blade of heavy gas turbine and preparation method thereof |
| CN114433789A (en) * | 2022-01-27 | 2022-05-06 | 清华大学 | Ceramic core easy to remove core and preparation method thereof |
| CN114505450A (en) * | 2022-02-24 | 2022-05-17 | 安徽应流航源动力科技有限公司 | Composite ceramic rod for casting and molding top cover hole of hollow single crystal blade, manufacturing method and application |
| CN114804842A (en) * | 2022-05-11 | 2022-07-29 | 西安交通大学 | Preparation method of ceramic core with controllable pore distribution and atmosphere |
| CN115042299A (en) * | 2022-05-31 | 2022-09-13 | 安徽应流航源动力科技有限公司 | Preparation method of silicon-based ceramic core adopting quartz glass rod |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6174754A (en) * | 1984-09-18 | 1986-04-17 | Hitachi Ltd | Casting method of intricate hollow product |
| CN1931477A (en) * | 2005-09-13 | 2007-03-21 | 联合工艺公司 | Method for casting core removal |
| US20080011445A1 (en) * | 2005-10-27 | 2008-01-17 | United Technologies Corporation | Method for Casting Core Removal |
| EP2295166A1 (en) * | 2003-12-19 | 2011-03-16 | United Technologies Corporation | Investment casting cores |
| CN102632200A (en) * | 2012-04-28 | 2012-08-15 | 沈阳工业大学 | Ceramic mold core cracking prevention process method for combustion engine blades |
| CN102974767A (en) * | 2012-12-17 | 2013-03-20 | 中国科学院金属研究所 | Composite efficient ceramic core demolding process and special equipment thereof |
| CN103990761A (en) * | 2014-05-29 | 2014-08-20 | 西安交通大学 | Manufacturing method of hollow turbine blade provided with impact hole structure |
| CN104385440A (en) * | 2014-10-11 | 2015-03-04 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for molding ceramic core by embedding glass tube/ceramic tube |
-
2016
- 2016-01-25 CN CN201610049505.6A patent/CN105598390B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6174754A (en) * | 1984-09-18 | 1986-04-17 | Hitachi Ltd | Casting method of intricate hollow product |
| EP2295166A1 (en) * | 2003-12-19 | 2011-03-16 | United Technologies Corporation | Investment casting cores |
| CN1931477A (en) * | 2005-09-13 | 2007-03-21 | 联合工艺公司 | Method for casting core removal |
| US20080011445A1 (en) * | 2005-10-27 | 2008-01-17 | United Technologies Corporation | Method for Casting Core Removal |
| CN102632200A (en) * | 2012-04-28 | 2012-08-15 | 沈阳工业大学 | Ceramic mold core cracking prevention process method for combustion engine blades |
| CN102974767A (en) * | 2012-12-17 | 2013-03-20 | 中国科学院金属研究所 | Composite efficient ceramic core demolding process and special equipment thereof |
| CN103990761A (en) * | 2014-05-29 | 2014-08-20 | 西安交通大学 | Manufacturing method of hollow turbine blade provided with impact hole structure |
| CN104385440A (en) * | 2014-10-11 | 2015-03-04 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for molding ceramic core by embedding glass tube/ceramic tube |
Non-Patent Citations (4)
| Title |
|---|
| 刘涛等: "面向空心涡轮叶片的氧化铝基陶瓷铸型高温强化制造", 《航空学报》 * |
| 李彪等: "高温合金空心叶片用氧化铝基陶瓷型芯脱芯研究现状", 《铸造》 * |
| 王宝生等: "氧化铝基陶瓷型芯的脱芯工艺研究", 《铸造》 * |
| 鲁中良等: "基于光固化成型技术的空心叶片陶瓷铸型制造缺陷控制", 《机械工程学报》 * |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152313A (en) * | 2017-06-13 | 2017-09-12 | 西安交通大学 | A kind of steam turbine last stage hollow blade based on 3d printings and preparation method thereof |
| CN107152313B (en) * | 2017-06-13 | 2019-05-24 | 西安交通大学 | A kind of steam turbine last stage hollow blade and preparation method thereof based on 3d printing |
| CN108015224A (en) * | 2017-12-11 | 2018-05-11 | 株洲中航动力精密铸造有限公司 | Hollow Blade Wax patterns drawing method |
| CN110369676A (en) * | 2018-04-12 | 2019-10-25 | 杨成武 | A method of making hollow mold |
| CN109279875A (en) * | 2018-08-24 | 2019-01-29 | 清华大学 | The preparation method of ceramic mould |
| CN109279875B (en) * | 2018-08-24 | 2021-02-26 | 清华大学 | Preparation method of ceramic mold |
| CN109351912A (en) * | 2018-11-20 | 2019-02-19 | 安徽应流航源动力科技有限公司 | One kind is for adjusting engine blade ceramic core positioning mold and localization method |
| CN110483087A (en) * | 2019-09-16 | 2019-11-22 | 郑州航空工业管理学院 | Turbine blade of gas turbine hot investment casting alumina based ceramic core manufacturing method |
| CN112427625A (en) * | 2020-11-12 | 2021-03-02 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for removing ceramic core for blade with integral casting cover plate structure |
| CN113333670A (en) * | 2021-05-25 | 2021-09-03 | 贵州安吉航空精密铸造有限责任公司 | Preparation method of wax mould with built-in cavity |
| CN114249588A (en) * | 2021-12-28 | 2022-03-29 | 沈阳铸造研究所有限公司 | Silica-based ceramic core for large-size directional hollow blade of heavy gas turbine and preparation method thereof |
| CN114433789A (en) * | 2022-01-27 | 2022-05-06 | 清华大学 | Ceramic core easy to remove core and preparation method thereof |
| CN114433789B (en) * | 2022-01-27 | 2023-08-25 | 清华大学 | Ceramic core easy to take off core and preparation method thereof |
| CN114505450A (en) * | 2022-02-24 | 2022-05-17 | 安徽应流航源动力科技有限公司 | Composite ceramic rod for casting and molding top cover hole of hollow single crystal blade, manufacturing method and application |
| CN114505450B (en) * | 2022-02-24 | 2023-04-18 | 安徽应流航源动力科技有限公司 | Composite ceramic rod for casting and molding top cover hole of hollow single crystal blade, manufacturing method and application |
| CN114804842A (en) * | 2022-05-11 | 2022-07-29 | 西安交通大学 | Preparation method of ceramic core with controllable pore distribution and atmosphere |
| CN114804842B (en) * | 2022-05-11 | 2022-12-09 | 西安交通大学 | Preparation method of ceramic core with controllable pore distribution and atmosphere |
| CN115042299A (en) * | 2022-05-31 | 2022-09-13 | 安徽应流航源动力科技有限公司 | Preparation method of silicon-based ceramic core adopting quartz glass rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105598390B (en) | 2017-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105598390A (en) | Hollow blade ceramic mold and core removal method thereof | |
| CN103521715B (en) | A kind of preparation method of the titanium or titanium alloy precision casting containing elongated lumens | |
| CN103990761B (en) | A kind of production method of hollow turbine vane with impact opening structure | |
| CN102717029B (en) | Casting method for large thin-wall shell aluminium alloy casting | |
| CN105364002B (en) | A kind of full form casting process for accelerating casting solidification to cool down | |
| CN105127374B (en) | Composite mold core for titanium and titanium alloy casting and preparation method of composite mold core | |
| CN108746496B (en) | Preparation method of mold shell for investment casting | |
| CN103861998A (en) | Investment casting method | |
| CN105170911A (en) | Manufacturing method for complex specially-shaped composite sand core | |
| CN110434277A (en) | Improve ceramic mould precision investment surface smoothness, the method for precision and service life | |
| CN105983656A (en) | Investment casting technology | |
| CN104999034B (en) | Casting method of large allowance-free pressure expander precise casting piece | |
| CN103157763A (en) | Application method of urea core and ceramic core | |
| CN103128227A (en) | Method for manufacturing shell surface layer formed by stainless steel precision casting | |
| CN101954454A (en) | Method for eliminating casting heating cracks | |
| CN101850401A (en) | Fired mold and precision casting process utilizing same | |
| CN103464684A (en) | Precise investment casting method | |
| CN111203514A (en) | Precision casting method for high-temperature alloy complex thin-wall casting | |
| CN107695295A (en) | A kind of casting processing method of fusible pattern | |
| CN110640085A (en) | Investment casting process for hollow casting | |
| CN104043777A (en) | Investment casting method | |
| CN101733394B (en) | Casting method of upright column of rolling mill | |
| CN104550740A (en) | Method for casting large thin-wall rotation body high strength aluminum alloy casting | |
| CN104550735A (en) | Precision casting method of last stage extra-long guide blade for million-kilowatt nuclear power unit | |
| CN207013682U (en) | A kind of precision-investment casting chill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |