CN105802459B - Cobalt aluminate coating, cobalt aluminate preparation method for coating and ceramic core manufacturing method - Google Patents
Cobalt aluminate coating, cobalt aluminate preparation method for coating and ceramic core manufacturing method Download PDFInfo
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- CN105802459B CN105802459B CN201610227441.4A CN201610227441A CN105802459B CN 105802459 B CN105802459 B CN 105802459B CN 201610227441 A CN201610227441 A CN 201610227441A CN 105802459 B CN105802459 B CN 105802459B
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
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- 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
- C04B41/50—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 inorganic materials
- C04B41/5025—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 inorganic materials with ceramic materials
- C04B41/5031—Alumina
- C04B41/5032—Aluminates
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- 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
- C04B41/85—Coating or impregnation with inorganic materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
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Abstract
The present invention discloses a kind of cobalt aluminate coating, including following components in percentage by weight：20 40% cobalt aluminate, 15 20% polyethylene glycol, 30 40% deionized water, 5 10% ammonium dihydrogen phosphate, 0 20% aluminium oxide, 0.5 1% antifoaming agent.It refines refinement cast(ing) surface crystal grain.The preparation method and ceramic core manufacturing method of cobalt aluminate coating are also disclosed.
Description
Technical field
The present invention relates to the precision casting technologies of high-temperature alloy part, and in particular to cobalt aluminate coating, cobalt aluminate coating
Preparation method and ceramic core manufacturing method.
Background technology
Currently, the manufacture of gas turbine turbine blade concentrates on equiax crystal, column crystal, monocrystalline, but the application of equiax crystal is still
Mainstream.The manufacture of equiax crystal turbine blade mainly still concentrates in fine grain casting, and it is the smaller the better to make every effort to crystal grain, cast(ing) surface crystal grain
Refinement technology is also quite ripe, for ferrous alloy, the method for the widely used mo(U)ld face brushing cobalt aluminate coating of industry.
But the refinement of cast-internal crystal grain is also of equal importance for the raising of casting quality, the refinement of cast-internal crystal grain is conducive to
Greatly improve the comprehensive performance of casting.
For this reason, it may be desirable to seek a kind of technical solution, at least mitigate there are the problem of.
Invention content
On the one hand, the technical problem to be solved by the present invention is to provide a kind of cobalt aluminate painting that can refine cast(ing) surface crystal grain
Material.
On the other hand, the technical problem to be solved by the present invention is to provide a kind of preparation method of cobalt aluminate coating.
In another aspect, the technical problem to be solved by the present invention is to provide a kind of ceramic core manufacturing method.
The technical issues of to solve one side, the present invention use following technical proposals.
A kind of cobalt aluminate coating, including following components in percentage by weight：The cobalt aluminate of 20-40%, the poly- second two of 15-20%
Alcohol, the deionized water of 30-40%, the ammonium dihydrogen phosphate of 5-10%, the aluminium oxide of 0-20%, the antifoaming agent of 0.5-1%.
The grain graininess of the cobalt aluminate is 300-400 mesh.
The technical issues of to solve another aspect, the present invention use following technical proposals.
A kind of preparation method of cobalt aluminate coating, includes the following steps：
Step 1 takes following components in percentage by weight：The cobalt aluminate of 20-40%, the polyethylene glycol of 15-20% and 30-40%
Deionized water, then by aforementioned each component be uniformly mixed obtain mixture；
The aluminium oxide of the ammonium dihydrogen phosphate of 5-10% weight percent, 0-20% weight percent is added to institute by step 2
It states in the obtained mixture of step 1 and is uniformly mixed；And
The antifoaming agent of 0.5-1% weight percent is added in the obtained mixture of the step 2 and is mixed by step 3
Conjunction uniformly obtains the cobalt aluminate coating.
In the step 1, each component is uniformly mixed using planetary ball mill.
In the step 2, each component is uniformly mixed using planetary ball mill.
In the step 3, each component is uniformly mixed using de-airing mixer.
The grain graininess of the cobalt aluminate is 300-400 mesh.
The technical issues of to solve another further aspect, the present invention use following technical proposals.
A kind of ceramic core manufacturing method, includes the following steps：
S1 prepares the ceramic core less than relative theory size 0.05-0.5mm；
S2 obtains cobalt aluminate coating using the preparation method of above-mentioned cobalt aluminate coating；
The surface of S3, the ceramic core prepared by the S1 uniformly coat the obtained cobalt aluminate coating of the S2；With
And
S4, after the ceramic core drying that the S3 is obtained, by the ceramic core through 1- under 700-900 DEG C of temperature condition
It is pre-sintered within 2 hours and obtains the ceramic core of surface cladding fine grain cobalt aluminate coating.
Construction method is coated in the S3 is：Use infusion process by the ceramic core prepared by the S1 in vacuum degree for 1-
At least 1h in the obtained cobalt aluminate coating of the S2, or the ceramics using spray coating method prepared by S1 are immersed under conditions of 5pa
The surface of core uses spray gun spraying thickness for the coating of 0.05-0.1mm.
Drying means is in the S4：The ceramic core that the S3 is obtained is dried 4-5 hours at ambient temperature, or
1-2h is kept the temperature in the environment that temperature is 100-130 DEG C.
The present invention has following advantageous effects.
Show that cobalt aluminate coating of the invention can effectively refine cast-internal surface microstructure by contrast experiment, carries significantly
The comprehensive performance of high casting.Ceramic core manufacturing method using the present invention carries out at cobalt aluminate coating ceramic core surface
Reason, when construction, the fine grain cobalt aluminate coating layer touch of core cavity and ceramic core outer layer, to make the crystal grain of casting also obtain carefully
Change.
Description of the drawings
Fig. 1 is the metallograph of the surface of internal cavity of the casting prepared using the ceramic core that the present invention is not used.
Fig. 2 is the metallograph of the surface of internal cavity of the casting prepared using the ceramic core using the present invention.
Specific implementation mode
For can the technical characteristic that the present invention will be described in detail and effect, and can be realized according to the content of this specification, below
Embodiments of the present invention are further illustrated in conjunction with attached drawing.
Implement 1
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：20% cobalt aluminate, 15% poly- second
Glycol, 40% deionized water, 10% ammonium dihydrogen phosphate, 14.5% aluminium oxide, 0.5% antifoaming agent.
Embodiment 2
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：40% cobalt aluminate, 20% poly- second
Glycol, 30% deionized water, 9% ammonium dihydrogen phosphate, 0% aluminium oxide, 1% antifoaming agent.
Embodiment 3
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：25% cobalt aluminate, 17% poly- second
Glycol, 33% deionized water, 5% ammonium dihydrogen phosphate, 19.5% aluminium oxide, 0.5% antifoaming agent.
Embodiment 4
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：30% cobalt aluminate, 19% poly- second
Glycol, 35.2% deionized water, 7% ammonium dihydrogen phosphate, 8.1% aluminium oxide, 0.7% antifoaming agent.
Embodiment 5
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：35% cobalt aluminate, 16.6% it is poly-
Ethylene glycol, 34.3% deionized water, 8.2% ammonium dihydrogen phosphate, 5% aluminium oxide, 0.9% antifoaming agent.
Embodiment 6
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：22.5% cobalt aluminate, 16% it is poly-
Ethylene glycol, 36% deionized water, 6% ammonium dihydrogen phosphate, 18.9% aluminium oxide, 0.6% antifoaming agent.
Embodiment 7
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：27.5% cobalt aluminate, 18% it is poly-
Ethylene glycol, 37.5% deionized water, 9.5% ammonium dihydrogen phosphate, 6.7% aluminium oxide, 0.8% antifoaming agent.
Embodiment 8
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：32.5% cobalt aluminate, 15.1%
Polyethylene glycol, 35.4% deionized water, 5.5% ammonium dihydrogen phosphate, 10.7% aluminium oxide, 0.8% antifoaming agent.
Embodiment 9
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：23.8% cobalt aluminate, 15.1%
Polyethylene glycol, 38.9% deionized water, 5% ammonium dihydrogen phosphate, 16.7% aluminium oxide, 0.5% antifoaming agent.
Embodiment 10
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：37.2% cobalt aluminate, 15.1%
Polyethylene glycol, 38.9% deionized water, 5% ammonium dihydrogen phosphate, 3.3% aluminium oxide, 0.5% antifoaming agent.
Embodiment 11
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：24.5% cobalt aluminate, 17% it is poly-
Ethylene glycol, 33% deionized water, 5% ammonium dihydrogen phosphate, 20% aluminium oxide, 0.5% antifoaming agent.
Embodiment 12
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：28% cobalt aluminate, 17% poly- second
Glycol, 32% deionized water, 5% ammonium dihydrogen phosphate, 17.5% aluminium oxide, 0.5% antifoaming agent.
Embodiment 13
A kind of cobalt aluminate coating of the present invention, including following components in percentage by weight：38.3% cobalt aluminate, 17% it is poly-
Ethylene glycol, 32% deionized water, 5% ammonium dihydrogen phosphate, 7.2% aluminium oxide, 0.5% antifoaming agent.
In above-described embodiment, the grain graininess of cobalt aluminate is that 300-400 mesh is preferable.
Embodiment 14
A kind of preparation method of cobalt aluminate coating of the present invention, includes the following steps：
Step 1 takes cobalt aluminate, polyethylene glycol and deionized water by weight percent in above-described embodiment 1, then by the aluminium
Sour cobalt, polyethylene glycol and deionized water are uniformly mixed in planetary ball mill and obtain mixture, under normal circumstances, mix 30-60
Minute can be uniformly mixed；Wherein, the grain graininess of cobalt aluminate is that 300-400 mesh is preferable.
Step 2 will take ammonium dihydrogen phosphate, aluminium oxide to be added to abovementioned steps one by weight percent in above-described embodiment 1
In obtained mixture, continues batch mixing in planetary ball mill to being uniformly mixed, under normal circumstances, at least mix 15 minutes i.e.
It can be uniformly mixed.
Step 3 takes out the mixture of step 2 after mixing, will be by the defoaming of weight percent in above-described embodiment 1
Agent is added in the mixture of the step of taken out two after mixing, then is placed in de-airing mixer and is thoroughly mixed uniformly
Obtain cobalt aluminate coating.
Embodiment 15-26
The preparation method of other cobalt aluminate coating of the present invention the step of according to embodiment 14, presses embodiment 2- respectively
Weight percent takes each component to obtain corresponding cobalt aluminate coating in 13.
Embodiment 27
A kind of ceramic core manufacturing method of the present invention, includes the following steps：
S1 prepares the ceramic core less than relative theory size 0.05-0.5mm；
S2 obtains cobalt aluminate coating using the preparation method of any of the above-described cobalt aluminate coating；
The surface of S3, the ceramic core prepared by S1 uniformly coat the obtained cobalt aluminate coating of S2；
S4 is small through 1-2 under 700-900 DEG C of temperature condition by the ceramic core after the ceramic core drying for obtaining S3
When be pre-sintered to obtain the ceramic core of surface cladding fine grain cobalt aluminate coating.
In some embodiments, construction method is coated in above-mentioned S3 is：Using infusion process by the ceramics prepared by the S1
Core immerses at least 1h in the obtained cobalt aluminate coating of S2 under conditions of vacuum degree is 1-5pa, or using spray coating method in S1
The surface of prepared ceramic core uses spray gun spraying thickness for the coating of 0.05-0.1mm.
In some embodiments, drying means is in above-mentioned S4：The ceramic core that S3 is obtained is dried at ambient temperature
4-5 hours, or keep the temperature 1-2h in the environment that temperature is 100-130 DEG C.
Fig. 1 is the metallograph of the surface of internal cavity of the casting prepared using the ceramic core that the present invention is not used.Using the pottery
Porcelain core is formed by the crystallite dimension on core cavity surface, and crystallite dimension is between Φ 3-8mm, average grain size Φ
5.5mm。
Fig. 2 is the metallograph of the surface of internal cavity of the casting prepared using the ceramic core using the present invention.Same cast item
Under part, which contracts the crystallite dimension on the core cavity surface to be formed, and crystallite dimension is average between Φ 0.5-3.5mm
Crystallite dimension Φ 2mm.
It, can be with it can be seen that using the worth ceramic core of the cobalt aluminate coating and ceramic core manufacturing method of the present invention
Effective refinement core cavity surface microstructure.
It should be noted that each particular technique feature described in above-mentioned specific implementation mode, in reconcilable feelings
Under condition, it can be combined by any suitable mode.Each particular technique described in different specific implementation modes is special
Sign, in the case of no contradiction, can also be combined by any suitable mode each other.In order to avoid unnecessary
It repeats, the present invention is not described various combinations of possible ways.
Above with reference to embodiment to the present invention have been described in detail, it is illustrative rather than restrictive, is not taking off
From the change and modification under present general inventive concept, within protection scope of the present invention.
Claims (7)
1. a kind of ceramic core manufacturing method, which is characterized in that include the following steps：
S1 prepares the ceramic core less than relative theory size 0.05-0.5mm；
S2 obtains cobalt aluminate coating using the preparation method of cobalt aluminate coating；
The surface of S3, the ceramic core prepared by the S1 uniformly coat the obtained cobalt aluminate coating of the S2；And
S4 is small through 1-2 under 700-900 DEG C of temperature condition by the ceramic core after the ceramic core drying for obtaining the S3
When be pre-sintered to obtain the ceramic core of surface cladding fine grain cobalt aluminate coating；
The preparation method of the cobalt aluminate coating includes the following steps：
Step 1 takes following components in percentage by weight：The cobalt aluminate of 20-40%, the polyethylene glycol of 15-20% and 30-40% are gone
Ionized water, then aforementioned each component is uniformly mixed and obtains mixture；
The aluminium oxide of the ammonium dihydrogen phosphate of 5-10% weight percent, 0-20% weight percent is added to the step by step 2
In a rapid obtained mixture and it is uniformly mixed；And
The antifoaming agent of 0.5-1% weight percent is added in the obtained mixture of the step 2 and mixes by step 3
It is even to obtain the cobalt aluminate coating.
2. ceramic core manufacturing method according to claim 1, which is characterized in that coating construction method in the S3 is：
Use infusion process that the ceramic core prepared by the S1 is immersed to the S2 obtained aluminium under conditions of vacuum degree is 1-5pa
At least 1h in sour cobalt coating, or use the surface of ceramic core of the spray coating method prepared by S1 use spray gun spraying thickness for
The coating of 0.05-0.1mm.
3. ceramic core manufacturing method according to claim 1 or 2, which is characterized in that drying means is in the S4：It is right
The ceramic core that the S3 is obtained is dried 4-5 hours at ambient temperature, or keeps the temperature 1- in the environment that temperature is 100-130 DEG C
2h。
4. ceramic core manufacturing method according to claim 1, which is characterized in that in the step 1, using planet ball
Each component is uniformly mixed by grinding machine.
5. ceramic core manufacturing method according to claim 1, which is characterized in that in the step 2, using planet ball
Each component is uniformly mixed by grinding machine.
6. ceramic core manufacturing method according to claim 1, which is characterized in that in the step 3, stirred using vacuum
Machine is mixed to be uniformly mixed each component.
7. according to claim 4 to 6 any one of them preparation method, which is characterized in that the grain graininess of the cobalt aluminate is
300-400 mesh.
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| RU2794491C1 (en) * | 2022-12-19 | 2023-04-19 | Акционерное общество "ОДК-Авиадвигатель" | Suspension for the facing layer of a ceramic mold for investment casting (options) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106809885B (en) * | 2017-01-10 | 2019-07-12 | 上海印钞有限公司 | A kind of preparation method of nanometer cobalt blue dye |
| CN110181001A (en) * | 2019-07-08 | 2019-08-30 | 鹰普航空零部件（无锡）有限公司 | A kind of precision casting process of superalloy turbine |
| CN112207234A (en) * | 2020-10-14 | 2021-01-12 | 鹰普航空科技有限公司 | Precise casting process of complex high-temperature alloy nozzle ring |
| CN114346170A (en) * | 2021-12-20 | 2022-04-15 | 中国船舶重工集团公司第十二研究所 | Method for investment casting of high-temperature alloy casting |
| CN114350186A (en) * | 2021-12-23 | 2022-04-15 | 东方电气集团东方汽轮机有限公司 | Cobalt aluminate coating, ceramic core and preparation method |
| CN115301901A (en) * | 2022-08-04 | 2022-11-08 | 江苏永瀚特种合金技术股份有限公司 | Method for solving surface holes of inner cavity of large-size hollow blade |
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| CN104479440A (en) * | 2014-12-22 | 2015-04-01 | 东莞市罗曼罗兰电器科技有限公司 | Paint capable of releasing negative ions as well as preparation method and spraying technology thereof |
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| Title |
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| K418 高温合金用铝酸钴晶粒细化剂的研制及应用;邱华;《Foundry Technology》;20040430;第25卷(第4期);265-266页 * |
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| RU2794491C1 (en) * | 2022-12-19 | 2023-04-19 | Акционерное общество "ОДК-Авиадвигатель" | Suspension for the facing layer of a ceramic mold for investment casting (options) |
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