CN117142882A - Preparation method of room temperature enhancer of ceramic core, room temperature enhancer and enhancing method - Google Patents
Preparation method of room temperature enhancer of ceramic core, room temperature enhancer and enhancing method Download PDFInfo
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- CN117142882A CN117142882A CN202311039842.3A CN202311039842A CN117142882A CN 117142882 A CN117142882 A CN 117142882A CN 202311039842 A CN202311039842 A CN 202311039842A CN 117142882 A CN117142882 A CN 117142882A
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- ceramic core
- room temperature
- enhancer
- phenolic resin
- strengthening
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- 239000000919 ceramic Substances 0.000 title claims abstract description 134
- 239000003623 enhancer Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 230000002708 enhancing effect Effects 0.000 title abstract description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000005011 phenolic resin Substances 0.000 claims abstract description 31
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 31
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 20
- 235000019441 ethanol Nutrition 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 238000005728 strengthening Methods 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000004745 nonwoven fabric Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 18
- 238000007789 sealing Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000013001 point bending Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000010411 cooking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- XMHIUKTWLZUKEX-UHFFFAOYSA-N hexacosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCC(O)=O XMHIUKTWLZUKEX-UHFFFAOYSA-N 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/82—Coating or impregnation with organic materials
- C04B41/83—Macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
Abstract
The invention discloses a preparation method of a room temperature enhancer of a ceramic core, the room temperature enhancer and an enhancing method, comprising the following steps: mixing liquid phenolic resin and absolute ethyl alcohol according to the volume ratio of 90-98:10-2 to obtain phenolic resin solution; mixing phenolic resin solution and industrial alcohol according to the volume ratio of 1:1-2, stirring until the mixture is uniform and layering-free, and obtaining the room temperature enhancer of the ceramic core; immersing the ceramic core in the room temperature reinforcing agent for 40-60 min; taking out the ceramic core, removing redundant room temperature reinforcer on the surface of the ceramic core, and naturally drying the ceramic core in a room temperature environment for at least 12 hours; placing the ceramic core at a first temperature higher than the room temperature environment and drying for a first time; the ceramic core is dried for a second time at a second temperature that is higher than the first temperature. The invention adopts low-cost raw materials and simple formula, greatly improves the room temperature bending strength of the ceramic core, and has simple and convenient operation and high production efficiency.
Description
Technical Field
The invention relates to the technical field of ceramic cores, in particular to a preparation method of a room temperature enhancer of a ceramic core for turbine blade precision casting.
Background
The turbine blade is one of hot end components with the worst service environment, the highest performance requirement and the greatest manufacturing difficulty in the aeroengine. In order to increase thrust-to-weight ratio and fuel efficiency of an aeroengine, it is required to continuously increase the inlet temperature before the turbine of the engine, and therefore, the temperature bearing capacity of turbine blades is also required to be continuously improved.
The most effective technical approach to improving the temperature bearing capacity of aircraft engine turbine blades is to manufacture the turbine blades as hollow structures. The hollow turbine blade is produced in batch by adopting a precise casting process (lost wax method) generally, the principle is that a ceramic core is pre-buried in a metal mold, a wax mold with a built-in ceramic core is manufactured by adopting an injection molding method, a ceramic mold shell is duplicated on the surface of the wax mold, then the wax mold is melted to obtain the mold shell with the built-in ceramic core, molten metal is melted and poured into the ceramic mold shell, after the molten metal is cooled, the ceramic mold shell on the surface of a casting is knocked out, and the internal ceramic core is removed by adopting an alkaline cooking mode, so that the hollow turbine blade is obtained.
The ceramic core is an essential key adaptor for preparing the hollow turbine blade, the most commonly used ceramic core type is a silica-based core, the sintering strength of the ceramic core is less than 10MPa, and the ceramic core has low room temperature strength, so that the ceramic core cannot resist the impact force of high-pressure cerate to fracture in the wax mould injection molding process.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for preparing a room temperature enhancer for a ceramic core. The room temperature strength of the ceramic core can be at least improved by two times, and the preparation and strengthening method of the room temperature strengthening agent is convenient to operate, low in cost and environment-friendly.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a method for preparing a room temperature enhancer for a ceramic core, comprising:
mixing liquid phenolic resin and absolute ethyl alcohol according to the volume ratio of 90-98:10-2 to obtain phenolic resin solution;
the phenolic resin solution and the industrial alcohol are mixed according to the volume ratio of 1:1-2, and are stirred until the mixture is uniform and has no layering, and the room temperature enhancer of the ceramic core is obtained.
According to the room temperature strengthening method for the ceramic core, the phenolic resin solution and the industrial alcohol are mixed according to the volume ratio of 1:1-2 and stirred for 20-40 min.
The room temperature enhancer for the ceramic core is obtained by the preparation method of the room temperature enhancer for the ceramic core.
A method of room temperature strengthening of a ceramic core, comprising:
s1, providing a room temperature enhancer for the ceramic core of claim 3;
s2, immersing the ceramic core in the room-temperature reinforcing agent for 40-60 min;
s3, taking out the ceramic core, removing the superfluous room temperature reinforcing agent on the surface of the ceramic core, and naturally drying the ceramic core in a room temperature environment for at least 12 hours;
s4, drying the ceramic core at a first temperature higher than the room temperature environment for a first time;
s5, drying the ceramic core at a second temperature higher than the first temperature for a second time.
The method for strengthening the ceramic core at room temperature, wherein the room temperature environment is 18-24 ℃.
In the above method for reinforcing a ceramic core at room temperature, the first temperature is 50 to 60 ℃.
According to the room temperature strengthening method of the ceramic core, the first time is 20-40 min.
The method for strengthening the ceramic core at room temperature, wherein the second temperature is 100-120 ℃.
According to the room temperature strengthening method of the ceramic core, the second time is 20-40 min.
In the above method for reinforcing the ceramic core at room temperature, in S3, the ceramic core is suspended vertically, so that the room temperature enhancer on the surface of the ceramic core is allowed to drop freely for 2-3 min.
In the above method for reinforcing a ceramic core at room temperature, in S3, the room temperature enhancer on the surface of the ceramic core is wiped clean with a nonwoven fabric soaked with industrial alcohol.
The invention adopts the technology, so that compared with the prior art, the invention has the positive effects that:
(1) The invention adopts low-cost raw materials and simple formula, greatly improves the room temperature bending strength of the ceramic core, and has simple and convenient operation and high production efficiency.
(2) The ceramic core strengthened by the invention can greatly reduce the core breakage rate of the ceramic core of the turbine blade in the wax pressing process and improve the manufacturing qualification rate of the turbine blade.
Detailed Description
The following description of the present invention will be made clearly and fully, and it is apparent that the embodiments described are some, but not all, of the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Unless defined otherwise, technical or scientific terms used in the claims and specification should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
As used in the specification and claims of this application, the word "comprise" or similar words mean that the presence of an article preceding the word "comprising" encompasses the presence of an article listed after the word "comprising" or equivalents thereof, and does not exclude other articles.
The values mentioned in the present invention include all values increasing from low to high by one unit, here assuming that any lower value is separated from the higher value by at least two units. For example, if a component amount or a physical amount is said to be from 1 to 100, more preferably from 10 to 90, most preferably from 20 to 80, it is intended that values of 5 to 95, 14 to 76, 23 to 67, 32 to 58, 41 to 49, etc. are all expressly enumerated in this specification; for values less than 1, 0.0001, 0.001, 0.01 or 0.1 is considered to be a suitable unit. The foregoing examples are for illustrative purposes only, and in fact, all numerical combinations between the lowest value and the highest value enumerated are to be considered to be expressly listed in this specification in a similar manner.
Example 1
The embodiment provides a preparation method of a room temperature enhancer of a ceramic core of a preferred embodiment, which comprises the following steps: mixing liquid phenolic resin and absolute ethyl alcohol according to the volume ratio of 90-98:10-2 to obtain phenolic resin solution, and sealing for standby.
Mixing the phenolic resin solution and industrial alcohol according to the volume ratio of 1:1-2, stirring for 20-40 min, and uniformly mixing the phenolic resin solution and industrial alcohol without layering to obtain the room temperature enhancer for the ceramic core.
Example 2
The embodiment provides a preparation method of a room temperature enhancer of a ceramic core of a preferred embodiment, which comprises the following steps: mixing liquid phenolic resin and absolute ethyl alcohol according to a volume ratio of 97:3 to obtain reddish phenolic resin solution which is uniformly mixed, and sealing for later use.
Mixing the phenolic resin solution and the industrial alcohol according to the volume ratio of 1:1, stirring for 30min, and uniformly mixing the phenolic resin solution and the industrial alcohol without layering to obtain the room temperature enhancer for the ceramic core.
Example 3
The embodiment provides a preparation method of a room temperature enhancer of a ceramic core of a preferred embodiment, which comprises the following steps: mixing liquid phenolic resin and absolute ethyl alcohol according to a volume ratio of 97:3 to obtain reddish phenolic resin solution which is uniformly mixed, and sealing for later use.
Mixing the phenolic resin solution and industrial alcohol according to the volume ratio of 1:1.5, stirring for 30min, and uniformly mixing the phenolic resin solution and industrial alcohol without layering to obtain the room temperature enhancer for the ceramic core.
Example 4
The embodiment provides a preparation method of a room temperature enhancer of a ceramic core of a preferred embodiment, which comprises the following steps: mixing liquid phenolic resin and absolute ethyl alcohol according to the volume ratio of 90:10 to obtain reddish phenolic resin solution which is uniformly mixed, and sealing for later use.
Mixing the phenolic resin solution and the industrial alcohol according to the volume ratio of 1:1, stirring for 20min, and uniformly mixing the phenolic resin solution and the industrial alcohol without layering to obtain the room temperature enhancer for the ceramic core.
Example 5
The embodiment provides a preparation method of a room temperature enhancer of a ceramic core of a preferred embodiment, which comprises the following steps: mixing liquid phenolic resin and absolute ethyl alcohol according to the volume ratio of 98:2 to obtain reddish phenolic resin solution which is uniformly mixed, and sealing for later use.
Mixing the phenolic resin solution and the industrial alcohol according to the volume ratio of 1:2, stirring for 40min, and uniformly mixing the phenolic resin solution and the industrial alcohol without layering to obtain the room temperature enhancer for the ceramic core.
Example 6
This example provides a room temperature enhancer for a ceramic core, which is obtained by the method of producing a room temperature enhancer for a ceramic core of any of examples 1 to 5.
Example 7
The embodiment provides a room temperature strengthening method of a ceramic core, which comprises the following steps:
s1, providing a room temperature enhancer of the ceramic core obtained in the embodiment 1;
s2, immersing the ceramic core in the room temperature reinforcing agent for 40-60 min;
s3, taking out the ceramic core, vertically hanging the ceramic core, removing redundant room temperature reinforcing agent on the surface of the ceramic core, and naturally drying the ceramic core in a room temperature environment of 18-24 ℃ for at least 12 hours;
s4, drying the ceramic core at 50-60 ℃ for 20-40 min;
s5, placing the ceramic core at 100-120 ℃ and drying for 20-40 min.
In S3, the method of removing the excess room temperature enhancer from the surface of the ceramic core may be to suspend the ceramic core so that the excess room temperature enhancer on the surface of the ceramic core drops freely, or may be to wipe the room temperature enhancer on the surface of the ceramic core clean with a nonwoven fabric soaked with industrial alcohol.
It should be noted that, in this embodiment, each range may take each endpoint value, and may be freely combined.
Specifically, for example, in S2, the ceramic core is immersed in the room temperature reinforcement agent for 40 minutes, or the ceramic core is immersed in the room temperature reinforcement agent for 60 minutes.
Specifically, for example, in S4, the ceramic core is dried at 50 ℃ for 20min, or the ceramic core is dried at 50 ℃ for 40min, or the ceramic core is dried at 60 ℃ for 20min, or the ceramic core is dried at 60 ℃ for 40min, or the like.
It is to be noted that, in this embodiment, 0.0001, 0.001, 0.01 or 0.1 is considered to be a unit suitable for a value smaller than 1.
Example 8
The embodiment provides a room temperature strengthening method of a ceramic core, which comprises the following steps:
s1, providing a room temperature enhancer of the ceramic core obtained in the embodiment 2;
s2, immersing the ceramic core in the room-temperature reinforcing agent for 50min;
s3, taking out the ceramic core, vertically hanging the ceramic core so that the room temperature enhancer on the surface of the ceramic core is freely dripped for 2-3 min, and naturally drying the ceramic core in a room temperature environment at 18-24 ℃ for 15h;
s4, drying the ceramic core at 60 ℃ for 30min;
s5, drying the ceramic core at 120 ℃ for 30min.
The three-point bending strength (according to HB 5353) of the ceramic core after the strengthening is improved from 12-15MPa to 35-40MPa.
Example 9
The embodiment provides a room temperature strengthening method of a ceramic core, which comprises the following steps:
s1, providing a room temperature enhancer of the ceramic core obtained in the embodiment 3;
s2, immersing the ceramic core in the room-temperature reinforcing agent for 60min;
s3, taking out the ceramic core, vertically hanging the ceramic core so that the room temperature enhancer on the surface of the ceramic core is freely dripped for 2-3 min, and naturally drying the ceramic core in a room temperature environment at 18-24 ℃ for 12h;
s4, drying the ceramic core at 50 ℃ for 30min;
s5, drying the ceramic core at 100 ℃ for 30min.
Example 10
The embodiment provides a room temperature strengthening method of a ceramic core, which comprises the following steps:
s1, providing a room temperature enhancer of the ceramic core obtained in the embodiment 3;
s2, immersing the ceramic core in the room-temperature reinforcing agent for 60min;
s3, taking out the ceramic core, wiping the room temperature reinforcer on the surface of the ceramic core cleanly by using non-woven fabric soaked by industrial alcohol, and naturally drying the ceramic core in a room temperature environment of 18-24 ℃ for 12 hours;
s4, drying the ceramic core at 50 ℃ for 30min;
s5, drying the ceramic core at 100 ℃ for 30min.
The three-point bending strength (according to HB 5353) of the ceramic core after the strengthening is improved from 10-13MPa to 30-35MPa.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the teachings of the present invention, which are intended to be included within the scope of the invention.
Claims (10)
1. A method for preparing a room temperature enhancer for a ceramic core, comprising:
mixing liquid phenolic resin and absolute ethyl alcohol according to the volume ratio of 90-98:10-2 to obtain phenolic resin solution;
the phenolic resin solution and the industrial alcohol are mixed according to the volume ratio of 1:1-2, and are stirred until the mixture is uniform and has no layering, and the room temperature enhancer of the ceramic core is obtained.
2. The method for strengthening a ceramic core at room temperature according to claim 1, wherein the phenolic resin solution and the industrial alcohol are mixed and stirred for 20 to 40 minutes according to a volume ratio of 1:1 to 2.
3. A room temperature enhancer for a ceramic core, characterized by being obtained by the method for producing a room temperature enhancer for a ceramic core according to claim 1 or 2.
4. A method of room temperature strengthening a ceramic core, comprising:
s1, providing a room temperature enhancer for the ceramic core of claim 3;
s2, immersing the ceramic core in the room-temperature reinforcing agent for 40-60 min;
s3, taking out the ceramic core, removing the superfluous room temperature reinforcing agent on the surface of the ceramic core, and naturally drying the ceramic core in a room temperature environment for at least 12 hours;
s4, drying the ceramic core at a first temperature higher than the room temperature environment for a first time;
s5, drying the ceramic core at a second temperature higher than the first temperature for a second time.
5. The method of room temperature strengthening of a ceramic core of claim 4, wherein the first temperature is 50-60 ℃.
6. The method of room temperature strengthening of a ceramic core of claim 4, wherein the first time is 20 to 40 minutes.
7. The method of room temperature strengthening of a ceramic core according to claim 4, wherein the second temperature is 100 to 120 ℃.
8. The method of room temperature strengthening of a ceramic core according to claim 4, wherein the second time is 20 to 40 minutes.
9. The method of room temperature strengthening of a ceramic core according to claim 4, wherein in S3, the ceramic core is vertically hung so that the room temperature strengthening agent on the surface of the ceramic core is freely dropped for 2 to 3 minutes.
10. The method of room temperature strengthening of a ceramic core according to claim 4, wherein in S3, the room temperature strengthening agent on the surface of the ceramic core is wiped clean with a nonwoven fabric soaked with industrial alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311039842.3A CN117142882A (en) | 2023-08-17 | 2023-08-17 | Preparation method of room temperature enhancer of ceramic core, room temperature enhancer and enhancing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311039842.3A CN117142882A (en) | 2023-08-17 | 2023-08-17 | Preparation method of room temperature enhancer of ceramic core, room temperature enhancer and enhancing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117142882A true CN117142882A (en) | 2023-12-01 |
Family
ID=88899866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311039842.3A Pending CN117142882A (en) | 2023-08-17 | 2023-08-17 | Preparation method of room temperature enhancer of ceramic core, room temperature enhancer and enhancing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117142882A (en) |
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2023
- 2023-08-17 CN CN202311039842.3A patent/CN117142882A/en active Pending
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