CN107262661A - A kind of high temperature resistance and high strength water-soluble core and preparation method thereof - Google Patents
A kind of high temperature resistance and high strength water-soluble core and preparation method thereof Download PDFInfo
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- CN107262661A CN107262661A CN201710367292.6A CN201710367292A CN107262661A CN 107262661 A CN107262661 A CN 107262661A CN 201710367292 A CN201710367292 A CN 201710367292A CN 107262661 A CN107262661 A CN 107262661A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
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Abstract
The present invention relates to a kind of high temperature resistance and high strength water-soluble core and preparation method thereof, the mass percent of each component is water soluble salt 75% ~ 95%, ceramic material 5% ~ 25%, auxiliary agent 0 ~ 5% in the dispensing of prepared water-soluble core.Wherein, water soluble salt includes any one or a few the mixture in potassium sulfate, sodium sulphate, magnesium sulfate, ceramic material includes any one or a few the mixture in aluminium nitride, titanium nitride, tantalum nitride, boron nitride, aluminium nitride boron, silicon nitride, and auxiliary agent includes any one or a few the mixture in polyvinyl alcohol, polyvinylpyrrolidone, waterglass.Water-soluble core energy high temperature resistant, the intensity of the present invention is high, corrosion-free, nontoxic, cannot be only used for the casting of the high-melting-point alloys such as zinc, aluminium, copper, it may also be used for the high-pressure casting of the alloy such as zinc, aluminium, magnesium.
Description
Technical field
The present invention relates to precision casting technology field, more particularly to a kind of high temperature resistance and high strength water-soluble core and its preparation
Method.
Background technology
Water-soluble core refers to using water-soluble material as binding agent and adds filler, then by cast, compacting sintering into
The core that the different molding mode such as type is made.After casting pouring, the core can dissolve defeated and dispersed in water, reach cleaning core
Effect.Water-soluble core, which has, does not get angry, it is possible to decrease casting defect, the features such as easily remove, casting is not damaged during cleaning, especially
Suitable for the casting with complicated inner cavity and bending duct.In addition, water-soluble core is easily recycled, energy-conserving and environment-protective are
A kind of relatively advanced core-making technique, there is good application prospect.
At present, the combination property of water-soluble core is not good, remains in the defect that core strength is poor, temperature tolerance is low, it can only
During low-melting alloy for low-pressure is cast, therefore it also greatly limit the application of water-soluble core.
The content of the invention
For the above mentioned problem of prior art, it is an object of the invention to provide a kind of high temperature resistance and high strength water-soluble core and
Its preparation method, substantially increases the combination property of water-soluble core, so as to provide one for the high-pressure casting of high-melting-point alloy
Plant more applicable water-soluble core.
To solve the above problems, first aspect present invention provides a kind of high temperature resistance and high strength water-soluble core, it is described water-soluble
The mass percent of each component is in the dispensing of property core：Water soluble salt 75% ~ 95%, ceramic material 5% ~ 25%, auxiliary agent 0 ~ 5%, its
In,
The water soluble salt includes any one or a few the mixture in potassium sulfate, sodium sulphate, magnesium sulfate,
The ceramic material includes any one in aluminium nitride, titanium nitride, tantalum nitride, boron nitride, aluminium nitride boron, silicon nitride
Plant or several mixtures,
The auxiliary agent includes any one or a few the mixture in polyvinyl alcohol, polyvinylpyrrolidone, waterglass.
It is preferred that, in the dispensing of the water-soluble core, the water soluble salt is potassium sulfate, and the ceramic material is nitridation
Boron, the mass percent of the potassium sulfate is 75%, and the mass percent of the boron nitride is 25%.
It is preferred that, in the dispensing of the water-soluble core, the water soluble salt is magnesium sulfate, and the ceramic material is nitridation
Titanium, the auxiliary agent is polyvinyl alcohol, and the mass percent of the magnesium sulfate is 85%, and the mass percent of the titanium nitride is
12%, the mass percent of the polyvinyl alcohol is 3%.
Second aspect of the present invention provides a kind of preparation method of high temperature resistance and high strength water-soluble core, and methods described is included such as
Lower step：
1）Water soluble salt, ceramic material and auxiliary agent are weighed in proportion, are then added in batch mixer, it is well mixed to obtain dispensing；
2）By step 1）Described in charge fits into crucible, be then transferred into high temperature melting furnace carry out melt processed melted
Material；
3）By step 2）Described in melt carry out cast molding, obtain the water-soluble core,
Wherein, the mass percent of each component is in the dispensing：Water soluble salt 75% ~ 95%, ceramic material 5% ~ 25%, auxiliary agent 0 ~
5%,
The water soluble salt includes any one or a few the mixture in potassium sulfate, sodium sulphate, magnesium sulfate,
The ceramic material includes any one in aluminium nitride, titanium nitride, tantalum nitride, boron nitride, aluminium nitride boron, silicon nitride
Plant or several mixtures,
The auxiliary agent includes any one or a few the mixture in polyvinyl alcohol, polyvinylpyrrolidone, waterglass.
It is preferred that, the dispensing is made up of water soluble salt and ceramic material, wherein, the water soluble salt is potassium sulfate, institute
Ceramic material is stated for boron nitride, the mass percent of the potassium sulfate is 75%, the mass percent of the boron nitride is 25%.
It is preferred that, step 2）Described in melt processed temperature be 1000 ~ 1200 DEG C, fusing time be 2 ~ 5h.More preferably
, the temperature of melt processed is 1150 DEG C, and fusing time is 4h.
Third aspect present invention also provides a kind of preparation method of high temperature resistance and high strength water-soluble core, and methods described includes
Following steps：
1）Water soluble salt, ceramic material and auxiliary agent are weighed in proportion, are then added in batch mixer, it is well mixed to obtain dispensing；
2）By step 1）Described in charge fits into mould, and be compacted, the demoulding after cured obtains first product；
3）By step 2）Described in first product be sintered, obtain the water-soluble core,
Wherein, the mass percent of each component is in the dispensing：Water soluble salt 75% ~ 95%, ceramic material 5% ~ 25%, auxiliary agent 0 ~
5%,
The water soluble salt includes any one or a few the mixture in potassium sulfate, sodium sulphate, magnesium sulfate,
The ceramic material includes any one in aluminium nitride, titanium nitride, tantalum nitride, boron nitride, aluminium nitride boron, silicon nitride
Plant or several mixtures,
The auxiliary agent includes any one or a few the mixture in polyvinyl alcohol, polyvinylpyrrolidone, waterglass.
It is preferred that, the dispensing is made up of water soluble salt, ceramic material and auxiliary agent, wherein, the water soluble salt is sulfuric acid
Magnesium, the ceramic material is titanium nitride, and the auxiliary agent is polyvinyl alcohol, and the mass percent of the magnesium sulfate is 85%, the nitrogen
The mass percent for changing titanium is 12%, and the mass percent of the polyvinyl alcohol is 3%.
It is preferred that, step 3）Described in sintering processes temperature be 700 ~ 900 DEG C, sintering time be 10 ~ 15h, more preferably
, the temperature of sintering processes is 800 DEG C, and sintering time is 12h.
Compared with prior art, the present invention has the advantages that：
Water-soluble core energy high temperature resistant, intensity prepared by the present invention is high, corrosion-free, nontoxic, cannot be only used for zinc, aluminium,
The casting of the high-melting-point alloys such as copper, it may also be used for the high-pressure casting of the alloy such as zinc, aluminium, magnesium.
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained on the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
The present invention provides a kind of matter of each component in high temperature resistance and high strength water-soluble core, the dispensing of the water-soluble core
Measuring percentage is：Water soluble salt 75% ~ 95%, ceramic material 5% ~ 25%, auxiliary agent 0 ~ 5%, wherein, the water soluble salt includes sulfuric acid
Any one or a few mixture in potassium, sodium sulphate, magnesium sulfate, the ceramic material includes aluminium nitride, titanium nitride, nitridation
Any one or a few mixture in tantalum, boron nitride, aluminium nitride boron, silicon nitride, the auxiliary agent include polyvinyl alcohol,
Any one or a few mixture in polyvinylpyrrolidone, waterglass.
The present invention provides a kind of preparation method of high temperature resistance and high strength water-soluble core, and methods described comprises the following steps：
1）Water soluble salt, ceramic material and auxiliary agent are weighed in proportion, are then added in batch mixer, it is well mixed to obtain dispensing；
2）By step 1）Described in charge fits into crucible, be then transferred into high temperature melting furnace carry out melt processed melted
Material；
3）By step 2）Described in melt carry out cast molding, obtain the water-soluble core,
Wherein, the mass percent of each component is in the dispensing：Water soluble salt 75% ~ 95%, ceramic material 5% ~ 25%, auxiliary agent 0 ~
5%, the water soluble salt includes any one or a few the mixture in potassium sulfate, sodium sulphate, magnesium sulfate, the ceramic material
Material includes any one or a few the mixing in aluminium nitride, titanium nitride, tantalum nitride, boron nitride, aluminium nitride boron, silicon nitride
Thing, the auxiliary agent includes any one or a few the mixture in polyvinyl alcohol, polyvinylpyrrolidone, waterglass.
The present invention also provides a kind of preparation method of high temperature resistance and high strength water-soluble core, and methods described includes following step
Suddenly：
1）Water soluble salt, ceramic material and auxiliary agent are weighed in proportion, are then added in batch mixer, it is well mixed to obtain dispensing；
2）By step 1）Described in charge fits into mould, and be compacted, the demoulding after cured obtains first product；
3）By step 2）Described in first product be sintered, obtain the water-soluble core,
Wherein, the mass percent of each component is in the dispensing：Water soluble salt 75% ~ 95%, ceramic material 5% ~ 25%, auxiliary agent 0 ~
5%, the water soluble salt includes any one or a few the mixture in potassium sulfate, sodium sulphate, magnesium sulfate, the ceramic material
Material includes any one or a few the mixing in aluminium nitride, titanium nitride, tantalum nitride, boron nitride, aluminium nitride boron, silicon nitride
Thing, the auxiliary agent includes any one or a few the mixture in polyvinyl alcohol, polyvinylpyrrolidone, waterglass.
With reference to specific embodiment to a kind of high temperature resistance and high strength water-soluble core of the present invention and preparation method thereof
It is further described below.
Embodiment 1
1）Potassium sulfate and boron nitride are weighed, wherein mass percent shared by potassium sulfate is 75%, and mass percent shared by boron nitride is
25%, potassium sulfate and boron nitride are added in batch mixer, being allowed to well mixed using the high speed rotation of batch mixer obtains dispensing, mixes
The conjunction time is 10min.
2）By above-mentioned charge fits into crucible and be transferred in high temperature melting furnace carry out melt processed obtain melt, preferably
, melt processed temperature is 1150 DEG C, and fusing time is 4h.
3）Above-mentioned melt is cast in mould and is molded, heat preservation for standby use in 110 DEG C of baking ovens is put into after the demoulding to be cooled,
Produce high temperature resistance and high strength water-soluble core.
Through examining, the performance of obtained high temperature resistance and high strength water-soluble core described above is as follows：
Tensile strength：30MPa；
Heat resistance：It can be used at 1000 DEG C；
Collapsibility performance：Complete defeated and dispersed time≤10min in giant；
Anti-moisture absorption property：24h, tensile strength reduction by 3% are placed under conditions of air humidity 80%.
Embodiment 2
1）Magnesium sulfate, titanium nitride and polyvinyl alcohol are weighed, wherein mass percent shared by magnesium sulfate is 85%, matter shared by titanium nitride
It is 12% to measure percentage, and mass percent shared by polyvinyl alcohol is 3%, and magnesium sulfate, titanium nitride and polyvinyl alcohol are added into batch mixer
In, it is allowed to well mixed using the high speed rotation of batch mixer and obtains dispensing, incorporation time is 10min.
2）Above-mentioned charge fits are compacted into mould, treat that its curing and demolding obtains first product.
3）Above-mentioned first product is put into heat preservation for standby use in 110 DEG C of baking ovens in being sintered at 800 DEG C after 12h, sinter molding, produced resistance to
High-temp and high-strength water-soluble core.
Through examining, the performance of obtained high temperature resistance and high strength water-soluble core described above is as follows：
Tensile strength：28MPa；
Heat resistance：It can be used at 1050 DEG C；
Collapsibility performance：Complete defeated and dispersed time≤10min in giant；
Anti-moisture absorption property：24h, tensile strength reduction by 2.8% are placed under conditions of air humidity 80%.
Compared with prior art, the present invention has the advantages that：
Water-soluble core energy high temperature resistant, intensity prepared by the present invention is high, corrosion-free, nontoxic, cannot be only used for zinc, aluminium,
The casting of the high-melting-point alloys such as copper, it may also be used for the high-pressure casting of the alloy such as zinc, aluminium, magnesium.
Described above has fully disclosed the embodiment of the present invention.It is pointed out that being familiar with the field
Scope of any change that technical staff is done to the embodiment of the present invention all without departing from claims of the present invention.
Correspondingly, the scope of claim of the invention is also not limited only to previous embodiment.
Claims (9)
1. a kind of high temperature resistance and high strength water-soluble core, it is characterised in that the matter of each component in the dispensing of the water-soluble core
Measuring percentage is：Water soluble salt 75% ~ 95%, ceramic material 5% ~ 25%, auxiliary agent 0 ~ 5%, wherein,
The water soluble salt includes any one or a few the mixture in potassium sulfate, sodium sulphate, magnesium sulfate,
The ceramic material includes any one in aluminium nitride, titanium nitride, tantalum nitride, boron nitride, aluminium nitride boron, silicon nitride
Plant or several mixtures,
The auxiliary agent includes any one or a few the mixture in polyvinyl alcohol, polyvinylpyrrolidone, waterglass.
2. a kind of high temperature resistance and high strength water-soluble core according to claim 1, it is characterised in that the water-soluble core
Dispensing in, the water soluble salt is potassium sulfate, and the ceramic material is boron nitride, and the mass percent of the potassium sulfate is
75%, the mass percent of the boron nitride is 25%.
3. a kind of high temperature resistance and high strength water-soluble core according to claim 1, it is characterised in that the water-soluble core
Dispensing in, the water soluble salt be magnesium sulfate, the ceramic material be titanium nitride, the auxiliary agent be polyvinyl alcohol, the sulphur
The mass percent of sour magnesium is 85%, and the mass percent of the titanium nitride is 12%, and the mass percent of the polyvinyl alcohol is
3%。
4. a kind of preparation method of high temperature resistance and high strength water-soluble core, it is characterised in that methods described comprises the following steps：
1）Water soluble salt, ceramic material and auxiliary agent are weighed in proportion, are then added in batch mixer, it is well mixed to obtain dispensing；
2）By step 1）Described in charge fits into crucible, be then transferred into high temperature melting furnace carry out melt processed melted
Material；
3）By step 2）Described in melt carry out cast molding, obtain the water-soluble core,
Wherein, the mass percent of each component is in the dispensing：Water soluble salt 75% ~ 95%, ceramic material 5% ~ 25%, auxiliary agent 0 ~
5%,
The water soluble salt includes any one or a few the mixture in potassium sulfate, sodium sulphate, magnesium sulfate,
The ceramic material includes any one in aluminium nitride, titanium nitride, tantalum nitride, boron nitride, aluminium nitride boron, silicon nitride
Plant or several mixtures,
The auxiliary agent includes any one or a few the mixture in polyvinyl alcohol, polyvinylpyrrolidone, waterglass.
5. the preparation method of a kind of high temperature resistance and high strength water-soluble core according to claim 4, it is characterised in that described
Dispensing is made up of water soluble salt and ceramic material, wherein, the water soluble salt is potassium sulfate, and the ceramic material is boron nitride,
The mass percent of the potassium sulfate is 75%, and the mass percent of the boron nitride is 25%.
6. a kind of preparation method of high temperature resistance and high strength water-soluble core according to claim 4, it is characterised in that step
2）Described in melt processed temperature be 1000 ~ 1200 DEG C, fusing time be 2 ~ 5h.
7. a kind of preparation method of high temperature resistance and high strength water-soluble core, it is characterised in that methods described comprises the following steps：
1）Water soluble salt, ceramic material and auxiliary agent are weighed in proportion, are then added in batch mixer, it is well mixed to obtain dispensing；
2）By step 1）Described in charge fits into mould, and be compacted, the demoulding after cured obtains first product；
3）By step 2）Described in first product be sintered, obtain the water-soluble core,
Wherein, the mass percent of each component is in the dispensing：Water soluble salt 75% ~ 95%, ceramic material 5% ~ 25%, auxiliary agent 0 ~
5%,
The water soluble salt includes any one or a few the mixture in potassium sulfate, sodium sulphate, magnesium sulfate,
The ceramic material includes any one in aluminium nitride, titanium nitride, tantalum nitride, boron nitride, aluminium nitride boron, silicon nitride
Plant or several mixtures,
The auxiliary agent includes any one or a few the mixture in polyvinyl alcohol, polyvinylpyrrolidone, waterglass.
8. the preparation method of a kind of high temperature resistance and high strength water-soluble core according to claim 7, it is characterised in that described
Dispensing is made up of water soluble salt, ceramic material and auxiliary agent, wherein, the water soluble salt is magnesium sulfate, and the ceramic material is nitrogen
Change titanium, the auxiliary agent is polyvinyl alcohol, and the mass percent of the magnesium sulfate is 85%, and the mass percent of the titanium nitride is
12%, the mass percent of the polyvinyl alcohol is 3%.
9. a kind of preparation method of high temperature resistance and high strength water-soluble core according to claim 7, it is characterised in that step
3）Described in sintering processes temperature be 700 ~ 900 DEG C, sintering time be 10 ~ 15h.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3764575A (en) * | 1969-07-09 | 1973-10-09 | Schmidt Gmbh Karl | Salt core containing synthetic resin and water-glass as binders |
| JP2005066634A (en) * | 2003-08-22 | 2005-03-17 | Toyota Motor Corp | Water-soluble core binder, water-soluble core, and method for manufacturing the same |
| CN102159342A (en) * | 2008-07-18 | 2011-08-17 | 陶瓷技术有限责任公司 | Salt-based cores and method for production thereof |
| CN104475685A (en) * | 2014-11-14 | 2015-04-01 | 华中科技大学 | Preparation method of water-soluble sand core used for aluminium alloy or magnesium alloy thin wall complex casting |
| 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 |
-
2017
- 2017-05-23 CN CN201710367292.6A patent/CN107262661A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3764575A (en) * | 1969-07-09 | 1973-10-09 | Schmidt Gmbh Karl | Salt core containing synthetic resin and water-glass as binders |
| JP2005066634A (en) * | 2003-08-22 | 2005-03-17 | Toyota Motor Corp | Water-soluble core binder, water-soluble core, and method for manufacturing the same |
| CN102159342A (en) * | 2008-07-18 | 2011-08-17 | 陶瓷技术有限责任公司 | Salt-based cores and method for production thereof |
| CN104475685A (en) * | 2014-11-14 | 2015-04-01 | 华中科技大学 | Preparation method of water-soluble sand core used for aluminium alloy or magnesium alloy thin wall complex casting |
| 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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| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 361000 Tianfeng Road, Jimei District, Xiamen, Fujian Province, No. 69 Applicant after: Xiamen Jian Lin health home Limited by Share Ltd Address before: No. 69, Tianfeng Road, North District of Jimei, Xiamen, Fujian Applicant before: Xiamen Runner Industrial Corporation |
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Application publication date: 20171020 |