CN110240471A - A kind of Water-soluble ceramic core and preparation method thereof - Google Patents
A kind of Water-soluble ceramic core and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of Water-soluble ceramic core, the Water-soluble ceramic core is mainly made of the water-soluble inorganic salt of the quartz glass of 85-120 parts by weight and 22-45 parts by weight.The preparation method of the Water-soluble ceramic core, comprising the following steps: take quartz glass and water-soluble inorganic salt dry, ground and mixed, is then pressed into type in proportion, and demoulding obtains green body, green body is finally embedded to filler, temperature programming, high-temperature calcination to get.Compared with the existing technology, the present invention uses the combination of fused silica powder adding water soluble inorganic salts, and ingredient is simple, is easy to achieve the purpose that by control molding and sintering process to change its bulk properties.In addition, substantially reducing the dosage of salt compared with existing water-soluble core, the forming and service performance of type core are improved.
Description
Technical field
The present invention relates to a kind of Water-soluble ceramic cores and preparation method thereof, belong to ceramic core technical field.
Background technique
With the development of automobile, ship, weapons and aerospace industry, precision casting using increasingly extensive, for some tools
The performance requirement of the load elements and structural member that have labyrinth inner cavity steps up, and to casting, more stringent requirements are proposed for this.Than
Fluid director of machine like flying, supercharger impeller, casing body, waveguide etc..The key for forming complicated inner cavity or channel is to develop to be suitable for
Core material needed for casting entirety near-net-shape, performance and Engineering Reliability directly influence the qualification rate of precision castings, casting
Cause this and product quality.
The inner-cavity structure of most Melt castings is together with shape by being coated with coating, spreading molding sand, drying etc.
Technique is integrally formed.But when core cavity is excessively narrow or shape is more complicated, inner cavity in production can not be together with shape
It is formed, it is necessary to by previously prepared ceramic core.For this kind of ceramic core, the complexity of inner-cavity structure determines that it cannot
With the core material preparation routinely produced, can not be removed with the mechanical means routinely produced.Soluble core technology is to solve
This kind of key with complicated inner cavity and bending duct casting forming problem.It, can according to the type of depoling liquid used in removal type core
Dissolubility type core can be mainly divided into two types: one is water-soluble soluble core, another kind is water-insoluble soluble core,
Also referred to as chemolysis type core.The so-called solvable core of water solubility just refers to that type core meets water using room temperature water or hot water as depoling liquid
Defeated and dispersed or auxiliary is with mechanical external force removing type core.Water-insoluble solvable core is exactly using acid or alkali as depoling liquid, due to group
There is part that can react with acid or alkali in the ingredient of forming core and generates soluble product, thus make the defeated and dispersed removing of type core, therefore
Claim chemolysis type core.
Currently, the silicon substrate applied in high temperature alloy, Al-base ceramic type core, commonly used alkali soluble corrosion removing.And aluminium,
Magnesium alloy is due to chemical activity height, the method that cannot use alkali liquid corrosion, but the feature low according to such alloy pouring temperature, can be with
Using can voluntarily defeated and dispersed water-soluble core in water.There is water soluble salt core, using wide water-soluble core with water solubility
Water-soluble core based on salt and the Water-soluble ceramic core based on refractory material, that there are intensity is low for water soluble salt core,
The deficiencies of poor heat resistance and fragility, makes its application in hot investment casting by more limitation.Made with water-soluble inorganic salt
Based on and add a small amount of refractory material preparative core, can improve the excessive problem of salt core brittleness to a certain extent, but by
Shunk in forming process it is larger, by certain restriction when preparing complex core.
Summary of the invention
Goal of the invention: the purpose of the present invention is to provide a kind of Water-soluble ceramic cores and preparation method thereof.The present invention adopts
It uses water soluble salt as the binder of type core, so that type core is reached good comprehensive performance by sintering.
Technical solution: to achieve the above object of the invention, invention provides the following technical solutions:
A kind of Water-soluble ceramic core, the Water-soluble ceramic core mainly by the quartz glass of 85-120 parts by weight and
The water-soluble inorganic salt of 22-45 parts by weight is made.
As preferred:
The quartz glass be it is powdered, granularity be 240 mesh.
The water-soluble inorganic salt is selected from K2CO3、Na2CO3, or both arbitrary proportion mixing, further preferred K2CO3。
The preparation method of the Water-soluble ceramic core, comprising the following steps:
Take quartz glass and water-soluble inorganic salt dry, ground and mixed, is then pressed into type in proportion, and demoulding obtains base
Green body is finally embedded to filler by body, temperature programming, high-temperature calcination to get.
As preferred:
The drying condition are as follows: 100 DEG C -110 DEG C of temperature, time 1.5h-3h.
The ground and mixed uses ball mill, running parameter are as follows: ball milling 1.5h- under the revolving speed of 350r/min-400r/min
3h。
The condition of the compression moulding are as follows: the pressure maintaining 90s-120s under the pressure of 4MPa-5MPa.
The heating speed of described program heating is 200 DEG C/h-250 DEG C/h.
The condition of the high-temperature calcination are as follows: in -900 DEG C of holdings 0.5-1.5 hours of 650 DEG C of temperature.
Water-soluble ceramic core of the present invention is added water-soluble inorganic salt as binder, both may be used based on refractory material
The deficiencies of big and brittleness is big is shunk to avoid the type core forming based on salt, can also reduce the corruption to equipment to a certain extent
Erosion.
Technical effect: compared with the existing technology, the present invention uses the combination of fused silica powder adding water soluble inorganic salts, ingredient
Simply, it is easy to achieve the purpose that by control molding and sintering process to change its bulk properties.In addition, with existing water solubility
Type core is compared, and the dosage of salt is substantially reduced, and different process can be used and prepare complicated shape type core, hence it is evident that expanding type core uses model
It encloses.
Specific embodiment
Below with reference to specific example, the present invention is furture elucidated.
Quartz glass used in following embodiment be it is powdered, granularity is 240 mesh, and water-soluble inorganic salt used is selected from
K2CO3。
The detection of sample is all made of microcomputer controlled electronic universal tester and measures its bending strength in following embodiment.
Embodiment 1:
(1) by fused silica powder and water-soluble inorganic salt K2CO3It is put into baking oven, is dried in 100-110 DEG C of temperature
1.5h；
(2) 85 parts of fused silica powder, 22 parts of water-soluble inorganic salt are weighed；
(3) by after drying fused silica powder and water-soluble inorganic salt be fitted into planetary type ball-milling tank, 350r/min's
Ball milling 1.5hh under revolving speed；
(4) the pressure maintaining 90s compression moulding under the pressure of 4MPa-5MPa by mixed raw material, is then demoulded, obtains base
Body；
(5) green body suppressed is embedded to industrial oxidation Al filler, heated up according to the heating speed of 200 DEG C/h, in whole burning
650 DEG C of temperature keep the temperature 1 hour, obtain ceramic core.
Sintered ceramic core is tested, bending strength can reach 16MPa.
Embodiment 2:
(1) by fused silica powder and water-soluble inorganic salt K2CO3It is put into baking oven, dries 3h in 100-110 DEG C of temperature；
(2) 120 parts of fused silica powder, 45 parts of water-soluble inorganic salt are weighed；
(3) by after drying fused silica powder and water-soluble inorganic salt be fitted into planetary type ball-milling tank, 350r/min's
Ball milling 3h under revolving speed；
(4) the pressure maintaining 120s compression moulding under the pressure of 4MPa-5MPa by mixed raw material, is then demoulded, is obtained
Green body；
(5) green body suppressed is embedded to industrial oxidation Al filler, heated up according to the heating speed of 220 DEG C/h, in whole burning
850 DEG C of temperature keep the temperature 1 hour, obtain ceramic core.
Sintered ceramic core is tested, bending strength can reach 18MPa.
Embodiment 3:
(1) by fused silica powder and water-soluble inorganic salt K2CO3It is put into baking oven, dries 2h in 100-110 DEG C of temperature；
(2) 99 parts of fused silica powder, 30 parts of water-soluble inorganic salt are weighed；
(3) by after drying fused silica powder and water-soluble inorganic salt be fitted into planetary type ball-milling tank, 350r/min's
Ball milling 1.5h-3h under revolving speed；
(4) the pressure maintaining 100s compression moulding under the pressure of 4MPa-5MPa by mixed raw material, is then demoulded, is obtained
Green body；
(5) green body suppressed is embedded to industrial oxidation Al filler, heated up according to the heating speed of 200 DEG C/h, in whole burning
800 DEG C of temperature keep the temperature 1 hour, obtain ceramic core.
Sintered ceramic core is tested, bending strength can reach 9MPa.
Embodiment 4:
(1) by fused silica powder and water-soluble inorganic salt K2CO3It is put into baking oven, is dried in 100-110 DEG C of temperature
2.5h；
(2) 120 parts of fused silica powder, 30 parts of water-soluble inorganic salt are weighed；
(3) by after drying fused silica powder and water-soluble inorganic salt be fitted into planetary type ball-milling tank, 350r/min's
Ball milling 2.5h under revolving speed；
(4) the pressure maintaining 110s compression moulding under the pressure of 4MPa-5MPa by mixed raw material, is then demoulded, is obtained
Green body；
(5) green body suppressed is embedded to industrial oxidation Al filler, heated up according to the heating speed of 220 DEG C/h, in whole burning
750 DEG C of temperature keep the temperature 1 hour, obtain ceramic core.
Sintered ceramic core is tested, bending strength can reach 20MPa.
Embodiment 5:
(1) by fused silica powder and water-soluble inorganic salt K2CO3It is put into baking oven, dries 2h in 100-110 DEG C of temperature；
(2) 90 parts of fused silica powder, 22 parts of water-soluble inorganic salt are weighed；
(3) by after drying fused silica powder and water-soluble inorganic salt be fitted into planetary type ball-milling tank, 350r/min's
Ball milling 2.5h under revolving speed；
(4) the pressure maintaining 100s compression moulding under the pressure of 4MPa-5MPa by mixed raw material, is then demoulded, is obtained
Green body；
(5) green body suppressed is embedded to industrial oxidation Al filler, heated up according to the heating speed of 250 DEG C/h, in whole burning
750 DEG C of temperature keep the temperature 1 hour, obtain ceramic core.
Sintered ceramic core is tested, bending strength can reach 18MPa.
Embodiment 6:
(1) by fused silica powder and water-soluble inorganic salt K2CO3It is put into baking oven, is dried in 100-110 DEG C of temperature
2.5h；
(2) 120 parts of fused silica powder, 40 parts of water-soluble inorganic salt are weighed；
(3) by after drying fused silica powder and water-soluble inorganic salt be fitted into planetary type ball-milling tank, 350r/min's
Ball milling 2h under revolving speed；
(4) the pressure maintaining 90s compression moulding under the pressure of 4MPa-5MPa by mixed raw material, is then demoulded, obtains base
Body；
(5) green body suppressed is embedded to industrial oxidation Al filler, heated up according to the heating speed of 200 DEG C/h, in whole burning
750 DEG C of temperature keep the temperature 1 hour, obtain ceramic core.
Sintered ceramic core is tested, bending strength can reach 15MPa.
Embodiment 7:
(1) by fused silica powder and water-soluble inorganic salt K2CO3It is put into baking oven, is dried in 100-110 DEG C of temperature
1.5h；
(2) 99 parts of fused silica powder, 30 parts of water-soluble inorganic salt are weighed；
(3) by after drying fused silica powder and water-soluble inorganic salt be fitted into planetary type ball-milling tank, 350r/min's
Ball milling 3h under revolving speed；
(4) the pressure maintaining 110s compression moulding under the pressure of 4MPa-5MPa by mixed raw material, is then demoulded, is obtained
Green body；
(5) green body suppressed is embedded to industrial oxidation Al filler, heated up according to the heating speed of 200 DEG C/h, in whole burning
900 DEG C of temperature keep the temperature 1 hour, obtain ceramic core.
Sintered ceramic core is tested, bending strength can reach 11MPa.
Embodiment 8:
(1) by fused silica powder and water-soluble inorganic salt Na2CO3It is put into baking oven, is dried in 100-110 DEG C of temperature
1.5h；
(2) 110 parts of fused silica powder, 35 parts of water-soluble inorganic salt are weighed；
(3) by after drying fused silica powder and water-soluble inorganic salt be fitted into planetary type ball-milling tank, 350r/min's
Ball milling 3h under revolving speed；
(4) the pressure maintaining 110s compression moulding under the pressure of 4MPa-5MPa by mixed raw material, is then demoulded, is obtained
Green body；
(5) green body suppressed is embedded to industrial oxidation Al filler, heated up according to the heating speed of 220 DEG C/h, in whole burning
875 DEG C of temperature keep the temperature 1 hour, obtain ceramic core.
Sintered ceramic core is tested, bending strength can reach 10MPa.
Embodiment 9:
(1) by fused silica powder and water-soluble inorganic salt K2CO3、Na2CO3It is put into baking oven, in 100-110 DEG C of temperature
Dry 1.5h；
(2) 105 parts of fused silica powder are weighed, 28 parts of water-soluble inorganic salt, K in salt-mixture2CO3: Na2CO3For 2:1；
(3) by after drying fused silica powder and water-soluble inorganic salt be fitted into planetary type ball-milling tank, 350r/min's
Ball milling 3h under revolving speed；
(4) the pressure maintaining 110s compression moulding under the pressure of 4MPa-5MPa by mixed raw material, is then demoulded, is obtained
Green body；
(5) green body suppressed is embedded to industrial oxidation Al filler, heated up according to the heating speed of 210 DEG C/h, in whole burning
900 DEG C of temperature keep the temperature 1 hour, obtain ceramic core.
Sintered ceramic core is tested, bending strength can reach 12MPa.
Claims (9)
1. a kind of Water-soluble ceramic core, which is characterized in that the Water-soluble ceramic core is mainly by the stone of 85-120 parts by weight
English glass and the water-soluble inorganic salt of 22-45 parts by weight are made.
2. Water-soluble ceramic core according to claim 1, which is characterized in that the quartz glass is powdered, grain
Degree is 240 mesh.
3. Water-soluble ceramic core according to claim 1, which is characterized in that the water-soluble inorganic salt is K2CO3Or
Na2CO3, or both arbitrary proportion mixing.
4. the preparation method of the described in any item Water-soluble ceramic cores of claim 1-3, which is characterized in that including following step
It is rapid:
Take quartz glass and water-soluble inorganic salt dry, ground and mixed, is then pressed into type in proportion, and demoulding obtains green body, most
Green body is embedded to filler afterwards, temperature programming, high-temperature calcination to get.
5. the preparation method of Water-soluble ceramic core according to claim 4, which is characterized in that the drying condition are as follows:
100 DEG C -110 DEG C of temperature, time 1.5h-3h.
6. the preparation method of Water-soluble ceramic core according to claim 4, which is characterized in that the ground and mixed uses
Ball mill, running parameter are as follows: ball milling 1.5h-3h under the revolving speed of 350r/min-400r/min.
7. the preparation method of Water-soluble ceramic core according to claim 4, which is characterized in that the item of the compression moulding
Part are as follows: the pressure maintaining 90s-120s under the pressure of 4MPa-5MPa.
8. the preparation method of Water-soluble ceramic core according to claim 4, which is characterized in that described program heating adds
Thermal velocity is 200 DEG C/h-250 DEG C/h.
9. the preparation method of Water-soluble ceramic core according to claim 4, which is characterized in that the item of the high-temperature calcination
Part are as follows: in -900 DEG C of holdings 0.5-1.5 hours of 650 DEG C of temperature.
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Cited By (4)
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| CN114192737A (en) * | 2021-11-30 | 2022-03-18 | 滨州市正道机械制造有限公司 | Ceramic salt core manufacturing process |
| CN115321826A (en) * | 2021-05-10 | 2022-11-11 | 中国科学院上海硅酸盐研究所 | Water-soluble microcrystalline glass-based mold core and preparation method thereof |
| CN115710119A (en) * | 2022-11-29 | 2023-02-24 | 湖南圣瓷新材料有限公司 | Preparation method of ceramic arm based on water-based injection molding process |
| CN116120038A (en) * | 2023-02-08 | 2023-05-16 | 上海市固体废物处置有限公司 | Water-soluble mold core and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN115710119A (en) * | 2022-11-29 | 2023-02-24 | 湖南圣瓷新材料有限公司 | Preparation method of ceramic arm based on water-based injection molding process |
| CN115710119B (en) * | 2022-11-29 | 2023-10-31 | 湖南圣瓷新材料有限公司 | Preparation method of ceramic arm based on water-based injection molding process |
| CN116120038A (en) * | 2023-02-08 | 2023-05-16 | 上海市固体废物处置有限公司 | Water-soluble mold core and preparation method thereof |
| CN116120038B (en) * | 2023-02-08 | 2024-04-09 | 上海市固体废物处置有限公司 | Water-soluble mold core and preparation method thereof |
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