CN100522415C - Soluble ceramic core for metal casting - Google Patents
Soluble ceramic core for metal casting Download PDFInfo
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- CN100522415C CN100522415C CNB2004101554400A CN200410155440A CN100522415C CN 100522415 C CN100522415 C CN 100522415C CN B2004101554400 A CNB2004101554400 A CN B2004101554400A CN 200410155440 A CN200410155440 A CN 200410155440A CN 100522415 C CN100522415 C CN 100522415C
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- ceramic core
- composite material
- material powder
- metal casting
- soluble ceramic
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Abstract
The present invention is soluble ceramic core for casting of metal cavity, and the soluble ceramic core is made through compounding material, forming and sintering. The material for the soluble ceramic core consists of composite material powder 80-90 wt%, fine silica powder 1-10 wt% and CMC 5-15 wt%, and the composite material powder consists of quartzite in 70-99 wt% and quartz glass in 1-30 wt% mixed together. The soluble ceramic core has low cost and may be leached out from metal casting through setting the casting inside boiling industrial sodium carbonate solution for 0.5-1 hr or setting the casting inside molten alkali for 10-30 min. In addition, the ceramic core has easily regulated strength.
Description
Technical field
The present invention relates to a kind of soluble ceramic core for metal casting, be used for the casting of metal device cavity.
Background technology
Some metal devices that have cavity need the cavity core when casting, mostly the ceramic core that traditional metal casting is used is insoluble, the general alumina material that uses is made ceramic core, in use, can only carry out the physics fragmentation to the ceramic core in the back foundry goods that is shaped with the method for machinery, thereby obtain the die cavity of foundry goods inside.This method limitation is very big, because be difficult to obtain the vestibule of the inner complicated abnormity of foundry goods, and also can only clear up rectilinear vestibule during cleaning, thereby it can not satisfy the moulding requirement of the inner complicated cavity of metal casting.Another kind of advanced method is to adopt the ceramic core of solubility, the ceramic core of solubility is disposed after loosing in that the pyrosol more than 300 ℃ of available sodium hydroxide alkali fusion liquid or NaOH after the moulding is molten, at present, the ceramic core of solubility all uses high-grade high-purity quartz glass powder to make raw material, manufacturing cost is extremely expensive, can only be applicable to that minority precision metallic foundry goods uses, as part aircraft components etc., be difficult to penetration and promotion, and the stripping requirement condition of this type of pure quartz glass powder ceramic core is higher, use fusion alkali lye or high dense high temperature alkaline solution, even the hydrofluoric acid of use severe corrosive etc., dissolution time is also longer, and the intensity of pure quartz glass powder ceramic core can not reach instructions for use sometimes.The easier popularization and application of Development of New Generation, and have more high performance metal casting ceramic core, be that people thirst for.
Summary of the invention
The object of the present invention is to provide a kind of soluble ceramic core for metal casting, low cost of manufacture, easily stripping is beneficial to and applies.
Soluble ceramic core for metal casting of the present invention, through batching, fire after the moulding and form, make by following materials of weight proportions:
Composite material powder 80～90%, silicon powder 1～10%, CMC 5～15%;
Wherein composite material powder is mixed and made into by 70～99% quartz sand and 1～30% quartz glass.CMC is the abbreviation of carboxymethyl cellulose, is sodium carboxymethylcellulose again, and English name Carboxymethyl Cellulose is for product provides micropore.
The best compositing range of preparing burden is:
Composite material powder 83～87%, silicon powder 3～7%, CMC 8～12%;
Wherein composite material powder is mixed and made into by 75～95% quartz sand and 5～25% quartz glass.
The batching best group becomes:
Composite material powder 85%, silicon powder 5%, CMC 10%;
Wherein composite material powder is mixed and made into by 85% quartz sand and 15% quartz glass.
The most well 150 mesh sieves of composite material powder, it is better to cross 100 mesh sieves.
Batching is by organic bond compression mouldings such as wax liquid, and firing temperature is 1100～1500 ℃ and suits.
It is basic identical that other preparation technology operates the common process of producing with the pottery preparation, repeats no more.
The raw material that uses all has the commercially available prod among the present invention, can directly buy, and primary raw material has adopted quartz sand, and raw material is easy to get and is cheap, and preparation cost only is 1/10th to 1/3rd of a pure quartz glass powder ceramic core; General need be boiled the calcined soda for industry solution more than 30%, foundry goods is placed on wherein boils 30 minutes to one hour, and perhaps foundry goods is placed in the melt and dissolved alkali, only needs 10～30 minutes, and ceramic core is promptly leachable, and stripping is easy, and dissolving-out method is simple; And the convenient adjustment of ceramic core intensity of the present invention, be convenient to satisfy instructions for use.In practice, can produce the ceramic core of different heatproofs and requirement of strength according to different temperatures, the requirement of strength of different metal casting to ceramic core, adaptability improves greatly.Because solubility is good, ceramic core can be made into various complicated shapes, has greatly made things convenient for the requirement of the foundry goods of casting various complex-shaped surface moulds, is beneficial to and applies.
The specific embodiment
The present invention is further illustrated below in conjunction with embodiment.
Embodiment 1
Soluble ceramic core for metal casting of the present invention, the feed proportioning weight percent consists of:
Composite material powder 85%, silicon powder 5%, CMC10%;
Wherein composite material powder is mixed and made into by 85% quartz sand and 15% quartz glass.
Composite material powder is mixed the back cross 100 mesh sieves, getting minus mesh and silicon powder and CMC mixes, sneak into the wax liquid of molding mass weight 10%, mix again, packing into, compression moulding is core in the mould, after the demoulding, under 1300 ± 10 ℃ of temperature, fire, get ceramic core product of the present invention naturally after the cooling.
35% calcined soda for industry solution is boiled, ceramic core is placed on wherein boils 40 minutes, core is molten to loose.
Embodiment 2
Soluble ceramic core for metal casting of the present invention, the feed proportioning weight percent consists of:
Composite material powder 81%, silicon powder 8%, CMC 11%;
Wherein composite material powder is mixed and made into by 85% quartz sand and 15% quartz glass.
Composite material powder is mixed the back cross 100 mesh sieves, getting minus mesh and silicon powder and CMC mixes, sneak into the wax liquid of molding mass weight 11%, mix again, packing into, compression moulding is core in the mould, after the demoulding, under 1200 ± 10 ℃ of temperature, fire, get ceramic core product of the present invention naturally after the cooling.
35% calcined soda for industry solution is boiled, ceramic core is placed on wherein boils 35 minutes, core is molten to loose.
Embodiment 3
Soluble ceramic core for metal casting of the present invention, the feed proportioning weight percent consists of:
Composite material powder 88%, silicon powder 5%, CMC 7%;
Wherein composite material powder is mixed and made into by 88% quartz sand and 12% quartz glass.
Composite material powder is mixed the back cross 120 mesh sieves, getting minus mesh and silicon powder and CMC mixes, sneak into the wax liquid of molding mass weight 10%, mix again, packing into, compression moulding is core in the mould, after the demoulding, under 1400 ± 10 ℃ of temperature, fire, get ceramic core product of the present invention naturally after the cooling.
35% calcined soda for industry solution is boiled, ceramic core is placed on wherein boils 40 minutes, core is molten to loose.
Embodiment 4
Soluble ceramic core for metal casting of the present invention, the feed proportioning weight percent consists of:
Composite material powder 87%, silicon powder 3%, CMC 10%;
Wherein composite material powder is mixed and made into by 83% quartz sand and 17% quartz glass.
Composite material powder is mixed the back cross 110 mesh sieves, getting minus mesh and silicon powder and CMC mixes, sneak into the wax liquid of molding mass weight 12%, mix again, packing into, compression moulding is core in the mould, after the demoulding, under 1150 ± 10 ℃ of temperature, fire, get ceramic core product of the present invention naturally after the cooling.
Ceramic core is placed in the fusion alkali lye 15 minutes, and core is molten to loose.
Embodiment 5
Soluble ceramic core for metal casting of the present invention, the feed proportioning weight percent consists of:
Composite material powder 80%, silicon powder 8%, CMC 12%;
Wherein composite material powder is mixed and made into by 80% quartz sand and 20% quartz glass.
Composite material powder is mixed the back cross 120 mesh sieves, getting minus mesh and silicon powder and CMC mixes, sneak into the wax liquid of molding mass weight 11%, mix again, packing into, compression moulding is core in the mould, after the demoulding, under 1250 ± 10 ℃ of temperature, fire, get ceramic core product of the present invention naturally after the cooling.
35% calcined soda for industry solution is boiled, ceramic core is placed on wherein boils 35 minutes, core is molten to loose.
Embodiment 6
Soluble ceramic core for metal casting of the present invention, the feed proportioning weight percent consists of:
Composite material powder 89%, silicon powder 4%, CMC 7%;
Wherein composite material powder is mixed and made into by 85% quartz sand and 15% quartz glass.
Composite material powder is mixed the back cross 100 mesh sieves, getting minus mesh and silicon powder and CMC mixes, sneak into the wax liquid of molding mass weight 9%, mix again, packing into, compression moulding is core in the mould, after the demoulding, under 1420 ± 10 ℃ of temperature, fire, get ceramic core product of the present invention naturally after the cooling.
35% calcined soda for industry solution is boiled, ceramic core is placed on wherein boils 50 minutes, core is molten to loose.
Claims (4)
- [claim 1] a kind of soluble ceramic core for metal casting through batching, fire after the moulding and form, is characterized in that being made by following materials of weight proportions:Composite material powder 80～90%, silicon powder 1～10%, CMC 5～15%;Wherein composite material powder is mixed and made into by 70～99% quartz sand and 1～30% quartz glass, and composite material powder is crossed 100 mesh sieves.
- [claim 2] soluble ceramic core for metal casting according to claim 1 is characterized in that being made by following materials of weight proportions:Composite material powder 83～87%, silicon powder 3～7%, CMC 8～12%;Wherein composite material powder is mixed and made into by 75～95% quartz sand and 5～25% quartz glass.
- [claim 3] soluble ceramic core for metal casting according to claim 2 is characterized in that being made by following materials of weight proportions:Composite material powder 85%, silicon powder 5%, CMC 10%;Wherein composite material powder is mixed and made into by 85% quartz sand and 15% quartz glass.
- [claim 4] is characterized in that according to claim 1,2 or 3 described soluble ceramic core for metal casting firing temperature is 1100～1500 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101554400A CN100522415C (en) | 2004-11-09 | 2004-11-09 | Soluble ceramic core for metal casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101554400A CN100522415C (en) | 2004-11-09 | 2004-11-09 | Soluble ceramic core for metal casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1772419A CN1772419A (en) | 2006-05-17 |
| CN100522415C true CN100522415C (en) | 2009-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004101554400A Expired - Fee Related CN100522415C (en) | 2004-11-09 | 2004-11-09 | Soluble ceramic core for metal casting |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028697A (en) * | 2013-01-22 | 2013-04-10 | 机械科学研究总院先进制造技术研究中心 | Manufacturing method for hot stamping die cooling pipeline |
| JP2014231080A (en) * | 2013-05-29 | 2014-12-11 | 三菱重工業株式会社 | Core for precision casting, production method therefor, and mold for precision casting |
| CN103601474B (en) * | 2013-10-24 | 2016-01-20 | 江苏大学 | A kind of superalloy single crystal blade Water-soluble ceramic core and preparation method thereof |
| JP6572933B2 (en) * | 2016-05-31 | 2019-09-11 | 株式会社デンソー | Casting core and manufacturing method thereof |
| US10981217B2 (en) | 2018-11-19 | 2021-04-20 | General Electric Company | Leachable casting core and method of manufacture |
| US11021968B2 (en) | 2018-11-19 | 2021-06-01 | General Electric Company | Reduced cross flow linking cavities and method of casting |
| US11998974B2 (en) | 2022-08-30 | 2024-06-04 | General Electric Company | Casting core for a cast engine component |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076877A (en) * | 1992-03-27 | 1993-10-06 | 北京航空航天大学 | Technique for making ceramic moulding core |
| US5468285A (en) * | 1994-01-18 | 1995-11-21 | Kennerknecht; Steven | Ceramic core for investment casting and method for preparation of the same |
| CN1416978A (en) * | 2001-11-09 | 2003-05-14 | 西北工业大学 | Low-temperature sintered alumina oriented monocrystalline ceramic core for hollow vane |
-
2004
- 2004-11-09 CN CNB2004101554400A patent/CN100522415C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076877A (en) * | 1992-03-27 | 1993-10-06 | 北京航空航天大学 | Technique for making ceramic moulding core |
| US5468285A (en) * | 1994-01-18 | 1995-11-21 | Kennerknecht; Steven | Ceramic core for investment casting and method for preparation of the same |
| CN1416978A (en) * | 2001-11-09 | 2003-05-14 | 西北工业大学 | Low-temperature sintered alumina oriented monocrystalline ceramic core for hollow vane |
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| Publication number | Publication date |
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| CN1772419A (en) | 2006-05-17 |
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Granted publication date: 20090805 Termination date: 20101109 |