CN106927798A - 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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- CN106927798A CN106927798A CN201710177972.1A CN201710177972A CN106927798A CN 106927798 A CN106927798 A CN 106927798A CN 201710177972 A CN201710177972 A CN 201710177972A CN 106927798 A CN106927798 A CN 106927798A
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/105—Salt cores
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- 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
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/444—Halide containing anions, e.g. bromide, iodate, chlorite
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- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
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- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The invention discloses a kind of Water-soluble ceramic core and preparation method thereof, the Water-soluble ceramic core is mainly made up of following raw material：100 120 parts of electro-corundum powder, 20 40 parts of water-soluble inorganic salt.Relative to prior art, the technology of the present invention has the advantage that：The present invention prepares Water-soluble ceramic core using three kinds of water miscible salt, according to requirement in actual use to core performance, can adjust the relative scale of salt, and then adjusts the performance of core.When such as wishing that core strength is high, can suitably increase K2CO3Consumption；When wishing that core keeping quality is good, it is desirable to reduce K2CO3Consumption.
Description
Technical field
The present invention relates to a kind of Water-soluble ceramic core and preparation method thereof, belong to precision casting technology field.
Background technology
With the development of manufacturing industry level, product reliability requirement is improved constantly, and product design increasingly function is intensive,
The function of being realized by multiple part combinations in the past gradually adopts single component to realize, pts wt lightens, the complexity of casting
Degree is also accordingly improved.When production has the isostructural part of complex appearance, special-shaped inner chamber, casting has other forming technologies
Not available advantage, even unique selection.
In recent years, aluminium, magnesium light alloy casting are more widely used, and part has complicated inner-cavity structure, gives
Casting Technology Design and castings production bring difficulty.Because Al alloys andMg alloys pouring temperature is low, inner chamber is formed using resin sand core
When, the collapsibility of core is poor after cast, is difficult to shake out during cleaning.On the other hand, complicated inner cavity is generally needed by multiple core groups
Conjunction could be formed, and not only technological design is complicated, and required frock is more, and the deviation produced during core combination, influence the essence of casting
Degree.
These above-mentioned problems can well be solved using water-soluble core, and do not produce harmful gas in casting pouring
Body, it is convenient and swift during cleaning, core dissolution can be removed using hydroblast after casting forming, obtain that there is clean smooth interior table
Face and the casting of excellent dimensions precision, it is not necessary to mechanical oscillation, do not have noise, while saving labour and improving the ring of foundry
Border health.
There are urea core, water soluble salt core using wide water-soluble core at present, but have the shortcomings that more significant：Urine
Plain whose surfaces are of poor quality, gas forming amount big, are also easy to produce gas hole defect；And the spy such as the low-intensity of salt core, low heat resistant and fragility
Point is extremely limited its application in alloy precision casting.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the invention provides a kind of Water-soluble ceramic core
And preparation method thereof.
Technical scheme：To achieve the above object, the invention provides a kind of Water-soluble ceramic core, it is mainly by following heavy
Amount part raw material is made：
100-120 parts of electro-corundum powder, water-soluble inorganic salt 20-40 parts, in terms of weight ratio：The water-soluble inorganic
Salt is NaCl 20-30 parts, Na2CO35-75 parts and K2CO35-75 parts of mixture.
It is preferred that, described Water-soluble ceramic core is mainly made up of following raw material：
100 parts of electro-corundum powder, water-soluble inorganic salt 20-40 parts, in terms of weight ratio：The water-soluble inorganic salt is
NaCl 20-30 parts, Na2CO35-75 parts and K2CO35-75 parts of mixture.
It is preferred that, described Water-soluble ceramic core is mainly made up of following raw material：
120 parts of electro-corundum powder, water-soluble inorganic salt 20-40 parts, in terms of weight ratio：The water-soluble inorganic salt is
NaCl 20-30 parts, Na2CO35-75 parts and K2CO35-75 parts of mixture.
It is preferred that, the granularity of the electro-corundum powder is 300 mesh.
Present invention also offers the preparation method of described Water-soluble ceramic core, by the raw material it is compressing after, then
Sintering, that is, obtain the Water-soluble ceramic core.
It is preferred that, the preparation method of described Water-soluble ceramic core is comprised the following steps：Each raw material is taken, is dried, then pressed
According to the ratio mixing of setting, mixed raw material is compressing, the demoulding obtains base substrate, and the base substrate sample that will finally suppress is buried
Enter industrial oxidation Al filler, heated up according to the firing rate of setting and sintered, obtain final product core.
Its specific preparation method is comprised the following steps：
(1) electro-corundum powder and water-soluble inorganic salt are put into baking oven, in 140 DEG C -150 DEG C of temperature 2.5h-3h
Drying；
(2) pretreated electro-corundum powder, water-soluble inorganic salt are weighed in ratio set in advance；
(3) load weighted electro-corundum powder and water-soluble inorganic salt are loaded the ball grinder of planetary ball mill,
Ball milling 1.5h-2h under the rotating speed of 350-380r/min r/min；
(4) mixed raw material is compressing, moulding process is the pressurize 90s-120s under the pressure of 7MPa-8MPa, so
After carry out the demoulding, obtain base substrate；
(5) the sample embedment industrial oxidation Al filler that will be suppressed, according to 90 DEG C/h -100 DEG C/h of heating speed
Degree heats up, and is sintered 1-1.5 hours at 720-750 DEG C, obtains core.
Water-soluble ceramic core based on refractory material has mechanical strength higher, refractoriness and chemically stable
Property, meanwhile, with preferable water solubility, the infringement that the depoling condition of harshness is caused to aluminium alloy castings can be effectively prevented from,
Therefore got a lot of applications in precision aluminium-alloy casting.
Water-soluble ceramic core based on refractory material, is expected to obtain mechanical strength higher, refractoriness and chemistry
Stability, and it is preferably water-soluble.This kind of Water-soluble ceramic core it is main with indissoluble refractory material for example aluminum oxide, zirconium silicate,
Silica etc. is base material, and soluble inorganic salt (chloride, carbonate or sulfate etc.) is binding agent, by corresponding shaping
Technique is made.
Technique effect：Relative to prior art, the technology of the present invention has the advantage that：The present invention is water miscible using three kinds
Salt prepares Water-soluble ceramic core, according to requirement in actual use to core performance, can adjust the relative scale of salt,
And then adjust the performance of core.When such as wishing that core strength is high, can suitably increase K2CO3Consumption；Wish that core keeping quality is good
When, it is desirable to reduce K2CO3Consumption.
Specific embodiment
According to following embodiments, the present invention may be better understood.And as it will be easily appreciated by one skilled in the art that embodiment
Described specific test result is merely to illustrate the present invention, without should also without limitation on the sheet described in claims
Invention.
Embodiment 1：
(1) electro-corundum powder and water-soluble inorganic salt are put into baking oven, are dried in 140 DEG C of temperature 3h；
(2) 120 parts of electro-corundum powder is weighed, 20 parts of water-soluble inorganic salt, the composition of the water-soluble inorganic salt is NaCl
20 parts, Na2CO35 parts and K2CO375 parts；
(3) electro-corundum powder is weighed, and water-soluble inorganic salt loads the ball grinder of planetary ball mill, 350r/min's
Ball milling 2h under rotating speed；
(4) mixed raw material is compressing, moulding process is the pressurize 120s under the pressure of 7MPa, is then taken off
Mould, obtains base substrate；
(5) the sample embedment industrial oxidation Al filler that will be suppressed, according to 90 DEG C/h -100 DEG C/h of heating speed
Degree heats up, and is sintered 1 hour at 720 DEG C, obtains core.
(6) ceramic core after test sintering, bending strength can reach 11MPa.
Embodiment 2：
(1) electro-corundum powder and water-soluble inorganic salt are put into baking oven, are dried in 150 DEG C of temperature 2.5h；
(2) 120 parts of electro-corundum powder is weighed, 40 parts of water-soluble inorganic salt, the composition of the water-soluble inorganic salt is NaCl
30 parts, Na2CO375 parts and K2CO35 parts；
(3) electro-corundum powder is weighed, and water-soluble inorganic salt loads the ball grinder of planetary ball mill, 380r/min's
Ball milling 1.5h under rotating speed；
(4) mixed raw material is compressing, moulding process is the pressurize 90s under the pressure of 8MPa, then carries out the demoulding,
Obtain base substrate；
(5) the sample embedment industrial oxidation Al filler that will be suppressed, according to 90 DEG C/h -100 DEG C/h of heating speed
Degree heats up, and is sintered 1.5 hours at 750 DEG C, obtains core.
(6) ceramic core after test sintering, bending strength can reach 7MPa.
Embodiment 3：
(1) electro-corundum powder and water-soluble inorganic salt are put into baking oven, are dried in 145 DEG C of temperature 2.8h；
(2) 110 parts of electro-corundum powder is weighed, 30 parts of water-soluble inorganic salt, the composition of the water-soluble inorganic salt is NaCl
25 parts, Na2CO340 parts and K2CO340 parts；
(3) electro-corundum powder is weighed, and water-soluble inorganic salt loads the ball grinder of planetary ball mill, 360r/min's
Ball milling 1.8h under rotating speed；
(4) mixed raw material is compressing, moulding process is the pressurize 100s under the pressure of 8MPa, is then taken off
Mould, obtains base substrate；
(5) the sample embedment industrial oxidation Al filler that will be suppressed, according to 90 DEG C/h -100 DEG C/h of heating speed
Degree heats up, and is sintered 1 hour at 730 DEG C, obtains core.
(6) ceramic core after test sintering, bending strength can reach 9MPa.
Embodiment 4：
(1) electro-corundum powder and water-soluble inorganic salt are put into baking oven, are dried in 140 DEG C of temperature 3h；
(2) 100 parts of electro-corundum powder is weighed, 20 parts of water-soluble inorganic salt, the composition of the water-soluble inorganic salt is NaCl
20 parts, Na2CO340 parts and K2CO340 parts；
(3) electro-corundum powder is weighed, and water-soluble inorganic salt loads the ball grinder of planetary ball mill, 350r/min's
Ball milling 1.5h under rotating speed；
(4) mixed raw material is compressing, moulding process is the pressurize 90s under the pressure of 8MPa, then carries out the demoulding,
Obtain base substrate；
(5) the sample embedment industrial oxidation Al filler that will be suppressed, according to 90 DEG C/h -100 DEG C/h of heating speed
Degree heats up, and is sintered 1 hour at 750 DEG C, obtains core.
(6) ceramic core after test sintering, bending strength can reach 8MPa.
Embodiment 5：
(1) electro-corundum powder and water-soluble inorganic salt are put into baking oven, are dried in 150 DEG C of temperature 3h；
(2) 100 parts of electro-corundum powder is weighed, 40 parts of water-soluble inorganic salt, the composition of the water-soluble inorganic salt is NaCl
20 parts, Na2CO375 parts and K2CO375 parts；
(3) electro-corundum powder is weighed, and water-soluble inorganic salt loads the ball grinder of planetary ball mill, 370r/min's
Ball milling 2h under rotating speed；
(4) mixed raw material is compressing, moulding process is the pressurize 110s under the pressure of 7MPa, is then taken off
Mould, obtains base substrate；
(5) the sample embedment industrial oxidation Al filler that will be suppressed, according to 90 DEG C/h -100 DEG C/h of heating speed
Degree heats up, and is sintered 1.2 hours at 750 DEG C, obtains core.
(6) ceramic core after test sintering, bending strength can reach 8MPa.
Claims (7)
1. a kind of Water-soluble ceramic core, it is characterised in that it is mainly made up of following raw material：
100-120 parts of electro-corundum powder, water-soluble inorganic salt 20-40 parts, in terms of weight ratio：The water-soluble inorganic salt is
NaCl 20-30 parts, Na2CO35-75 parts and K2CO35-75 parts of mixture.
2. Water-soluble ceramic core according to claim 1, it is characterised in that it is mainly by following raw material system
Into：
100 parts of electro-corundum powder, water-soluble inorganic salt 20-40 parts, in terms of weight ratio：The water-soluble inorganic salt is NaCl
20-30 parts, Na2CO35-75 parts and K2CO35-75 parts of mixture.
3. Water-soluble ceramic core according to claim 1, it is characterised in that it is mainly by following raw material system
Into：
120 parts of electro-corundum powder, water-soluble inorganic salt 20-40 parts, in terms of weight ratio：The water-soluble inorganic salt is NaCl
20-30 parts, Na2CO35-75 parts and K2CO35-75 parts of mixture.
4. Water-soluble ceramic core according to claim 1, it is characterised in that the granularity of the electro-corundum powder is 300
Mesh.
5. the preparation method of the Water-soluble ceramic core described in any one of claim 1-4, it is characterised in that by the raw material pressure
After being made shape, re-sinter, that is, obtain the Water-soluble ceramic core.
6. the preparation method of Water-soluble ceramic core according to claim 5, it is characterised in that comprise the following steps：Take
Each raw material, drying, then mixes according to set proportion, and mixed raw material is compressing, the demoulding obtains base substrate, finally will
The base substrate sample embedment industrial oxidation Al filler for suppressing, heats up according to the firing rate of setting and sinters, and obtains final product core.
7. the preparation method of Water-soluble ceramic core according to claim 5, it is characterised in that comprise the following steps：
(1) electro-corundum powder and water-soluble inorganic salt are put into baking oven, are dried in 140 DEG C -150 DEG C of temperature 2.5h-3h；
(2) pretreated electro-corundum powder, water-soluble inorganic salt are weighed in ratio set in advance；
(3) load weighted electro-corundum powder and water-soluble inorganic salt are loaded the ball grinder of planetary ball mill, in 350-
Ball milling 1.5h-2h under the rotating speed of 380r/min；
(4) mixed raw material is compressing, moulding process is the pressurize 90s-120s under the pressure of 7MPa-8MPa, is then taken off
Mould, obtains base substrate；
(5) the sample embedment industrial oxidation Al filler that will be suppressed, according to 90 DEG C/h -100 DEG C/h of firing rate liter
Temperature, sinters 1-1.5 hours at 720-750 DEG C, obtains core.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107737880A (en) * | 2017-09-01 | 2018-02-27 | 东风精密铸造安徽有限公司 | A kind of Water-soluble ceramic core and preparation method thereof |
| CN109550904A (en) * | 2019-01-03 | 2019-04-02 | 安徽应流久源核能新材料科技有限公司 | It is a kind of using powder as Water-soluble ceramic core of raw material and preparation method thereof |
| CN109574636A (en) * | 2018-12-22 | 2019-04-05 | 上海交通大学 | A kind of precision-investment casting aluminium alloy Water-soluble ceramic core and preparation method |
| CN109848363A (en) * | 2019-01-14 | 2019-06-07 | 东莞理工学院 | A kind of material being used to prepare soluble ceramic mold, soluble ceramic mold and its application |
| CN110240471A (en) * | 2019-06-19 | 2019-09-17 | 东南大学 | A kind of Water-soluble ceramic core and preparation method thereof |
| CN114850412A (en) * | 2022-04-26 | 2022-08-05 | 东南大学 | Hot-die-casting water-soluble ceramic core for light alloy investment casting and preparation method thereof |
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| JPS5215446B2 (en) * | 1974-04-19 | 1977-04-30 | ||
| US4840219A (en) * | 1988-03-28 | 1989-06-20 | Foreman Robert W | Mixture and method for preparing casting cores and cores prepared thereby |
| CN105693254A (en) * | 2016-02-03 | 2016-06-22 | 中国航空工业集团公司北京航空材料研究院 | Water-soluble ceramic core material and preparation method thereof |
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2017
- 2017-03-23 CN CN201710177972.1A patent/CN106927798B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5215446B2 (en) * | 1974-04-19 | 1977-04-30 | ||
| US4840219A (en) * | 1988-03-28 | 1989-06-20 | Foreman Robert W | Mixture and method for preparing casting cores and cores prepared thereby |
| CN105693254A (en) * | 2016-02-03 | 2016-06-22 | 中国航空工业集团公司北京航空材料研究院 | Water-soluble ceramic core material and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107737880A (en) * | 2017-09-01 | 2018-02-27 | 东风精密铸造安徽有限公司 | A kind of Water-soluble ceramic core and preparation method thereof |
| CN109574636A (en) * | 2018-12-22 | 2019-04-05 | 上海交通大学 | A kind of precision-investment casting aluminium alloy Water-soluble ceramic core and preparation method |
| CN109550904A (en) * | 2019-01-03 | 2019-04-02 | 安徽应流久源核能新材料科技有限公司 | It is a kind of using powder as Water-soluble ceramic core of raw material and preparation method thereof |
| CN109848363A (en) * | 2019-01-14 | 2019-06-07 | 东莞理工学院 | A kind of material being used to prepare soluble ceramic mold, soluble ceramic mold and its application |
| CN110240471A (en) * | 2019-06-19 | 2019-09-17 | 东南大学 | A kind of Water-soluble ceramic core and preparation method thereof |
| CN114850412A (en) * | 2022-04-26 | 2022-08-05 | 东南大学 | Hot-die-casting water-soluble ceramic core for light alloy investment casting and preparation method thereof |
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|---|---|
| CN106927798B (en) | 2020-10-09 |
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