CN1994964A - Composite alumina ceramic core material adopting alumina hollow sphere and its forming preparation process - Google Patents
Composite alumina ceramic core material adopting alumina hollow sphere and its forming preparation process Download PDFInfo
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- CN1994964A CN1994964A CN 200610135189 CN200610135189A CN1994964A CN 1994964 A CN1994964 A CN 1994964A CN 200610135189 CN200610135189 CN 200610135189 CN 200610135189 A CN200610135189 A CN 200610135189A CN 1994964 A CN1994964 A CN 1994964A
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Abstract
The invention discloses a composite alumina ceramic typed core material based on hollow ball of alumina as raw material, which comprises the following parts: 32. 5-60.5% white alundum, 20-50% hollow ball of alumina, 3-5% carborundum, 11. 16-14. 88% wax, 0.6-0.8% beeswax and 0.24-0.32% polyethylene. The invention can manufacture complex shaped ceramic typed core, which reduces bulk density of core.
Description
Technical field:
The present invention relates to a kind of ceramic core material and forming preparation process thereof, especially a kind of compound alumina ceramic core material and forming preparation process that adopts alumina hollow ball is mainly used in the precision casting field.
Background technology:
Ceramic core is as the adaptor that forms precision castings hollow lumen structure, and its effect is: form the cavity shape of precision castings, and with the dimensional precision of epimorph and formwork common guarantee precision castings wall thickness.After the foundry goods casting is finished, ceramic core is removed from foundry goods by machinery or chemolysis.The directional columnargrain that alumina ceramic core metallurgical chemistry stability, creep-resistant property is good, can guarantee the inner-cavity structure complexity and dimensional precision, the qualification rate of single crystal hollow blade also reduce the blade manufacturing cost, therefore be well suited for senior monocrystalline and use under the product casting condition altogether, its use temperature is greater than 1550 ℃.Because the main component of aluminum oxide core is a corundum, it reacts with the concentrated acid concentrated base under the condition of normal temperature and heating hardly, therefore is difficult to remove.And exist problems such as depoling apparatus expensive, depoling cycle length, cost height, limit aluminium base core and be applied to more wide field.
Summary of the invention:
At above-mentioned the deficiencies in the prior art, the invention provides a kind of compound alumina ceramic core material and forming preparation process that adopts alumina hollow ball.
For achieving the above object, the technical solution used in the present invention is: the compound alumina ceramic core material that adopts alumina hollow ball, its raw material weight per-cent is: white fused alumina 32.5～60.5%, alumina hollow ball 20～50%, silicon carbide 3～5%, paraffin 11.16～14.88%, beeswax 0.6～0.8%, polyethylene 0.24～0.32%.
The forming process of the compound alumina ceramic core material of employing alumina hollow ball is as follows: white fused alumina is crossed 325 mesh standard sieves and is got the lower part of screen branch; The hollow ball powder is crossed 160 mesh standard sieves and is got the lower part of screen branch; Then white fused alumina and hollow ball powder are pressed following mixed: after white fused alumina 32.5～60.5%, hollow ball powder 20～59%, silicon carbide 3-5% mixed, it was standby to make powder in 2 hours 105 ℃ of heating; Paraffin 11.16～14.88%, beeswax 0.6～0.8%, polyethylene 0.24～0.32% mixes under 130 ℃, and it is standby that mistake 325 mesh standard sieves are made softening agent.Mixer is warming up to 130 ℃, and adding prepares softening agent, adds the above-mentioned powder that mixes then while stirring, and powder all adds the back to be continued to stir 12 hours, pours out the finish mix ingot of cooling.Above-mentioned material ingot is made the ceramic core green compact of some shapes according to mould by following technical parameter with the ceramic core shaper: 90-120 ℃ of material cylinder temperature; 90-100 ℃ of nozzle temperature; Compacting pressure 4-20Mpa; 2-10 second inject time; Dwell time 10-20 second; Die temperature 30-40 ℃; Green compact make alumina ceramic core through 1200-1400 ℃ of high-temperature roasting.
The present invention is fit to produce the ceramic core of complicated shape.The ceramic core of making, do not react under the hot conditions with casting metals, cast(ing) surface is smooth. owing to reduced the volume density of core in the body material of core behind the adding hollow ball powder, thereby improved the solvable mistake of core greatly, shorten the depoling time, played the effect that reduces the precision casting cost and shorten the casting technique cycle.Core dimensional precision height has enough intensity simultaneously, and is indeformable when moulding, carrying and shove charge, not broken.
Embodiment:
Embodiment one
Get the alumina hollow ball 20% that white fused alumina 60.5%, the 160 mesh standard sieve lower part of screen divided 325 mesh standard sieve lower parts of screen is divided, silicon carbide 3% (1～3 micron) mixes with oleic acid 0.5%, after mixing 105 ℃ heat 2 hours standby.Get paraffin 14.88%, beeswax 0.8%, polyethylene 0.32% mixes under 130 ℃, and it is standby that mistake 325 mesh standard sieves are made softening agent.Mixer is warming up to 130 ℃, and adding prepares softening agent, adds the above-mentioned powder that mixes then while stirring, and powder all adds the back to be continued to stir 12 hours, pours out the finish mix ingot of cooling.
Embodiment two
Get the alumina hollow ball 40% that white fused alumina 41.5%, the 160 mesh standard sieve lower part of screen divided 325 mesh standard sieve lower parts of screen is divided, silicon carbide 4% (1～3 micron) mixes with oleic acid 0.5%, after mixing 105 ℃ heat 2 hours standby.Get paraffin 13.02%, beeswax 0.7%, polyethylene 0.28% mixes under 130 ℃, and it is standby that mistake 325 mesh standard sieves are made softening agent.Mixer is warming up to 130 ℃, and adding prepares softening agent, adds the above-mentioned powder that mixes then while stirring, and powder all adds the back to be continued to stir 12 hours, pours out the finish mix ingot of cooling.
Embodiment three
Get the alumina hollow ball 50% that white fused alumina 32.5%, the 160 mesh standard sieve lower part of screen divided 325 mesh standard sieve lower parts of screen is divided, silicon carbide 5% (1～3 micron) mixes with oleic acid 0.5%, after mixing 105 ℃ heat 2 hours standby.Get paraffin 11.16%, beeswax 0.6%, polyethylene 0.24% mixes under 130 ℃, and it is standby that mistake 325 mesh standard sieves are made softening agent.Mixer is warming up to 130 ℃, and adding prepares softening agent, adds the above-mentioned powder that mixes then while stirring, and powder all adds the back to be continued to stir 12 hours, pours out the finish mix ingot of cooling.
Above-mentioned material ingot is made the ceramic core green compact of some shapes according to mould by following technical parameter with the ceramic core shaper: 90-120 ℃ of material cylinder temperature; 90-100 ℃ of nozzle temperature; Compacting pressure 4-20Mpa; 2-10 second inject time; Dwell time 10-20 second; Die temperature 30-40 ℃; Green compact make alumina ceramic core through 1200-1400 ℃ of high-temperature roasting.
Claims (5)
1, adopt the compound alumina ceramic core material of alumina hollow ball, its raw material weight per-cent is: white fused alumina 32.5～60.5%, alumina hollow ball 20～50%, silicon carbide 3～5%, paraffin 11.16～14.88%, beeswax 0.6～0.8%, polyethylene 0.24～0.32%.
2, the compound alumina ceramic core material of employing alumina hollow ball as claimed in claim 1, its raw material weight per-cent is: white fused alumina 60.5%, alumina hollow ball 20%, silicon carbide 3%, paraffin 14.88%, beeswax 0.8%, polyethylene 0.32%.
3, the compound alumina ceramic core material of employing alumina hollow ball as claimed in claim 1, its raw material weight per-cent is: white fused alumina 41.5%, alumina hollow ball 40%, silicon carbide 4%, paraffin 13.02%, beeswax 0.7%, polyethylene 0.28%.
4, the compound alumina ceramic core material of employing alumina hollow ball as claimed in claim 1, its raw material weight per-cent is: white fused alumina 32.5%, alumina hollow ball 50%, silicon carbide 5%, paraffin 11.16%, beeswax 0.6%, polyethylene 0.24%.
5, the forming preparation process of the compound alumina ceramic core material of employing alumina hollow ball is as follows: white fused alumina is crossed 325 mesh standard sieves and is got the lower part of screen branch; The hollow ball powder is crossed 160 mesh standard sieves and is got the lower part of screen branch; Then white fused alumina and hollow ball powder are pressed following mixed: after white fused alumina 32.5～60.5%, hollow ball powder 20～50%, silicon carbide 3-5% mixed, it was standby to make powder in 2 hours 105 ℃ of heating; Paraffin 11.16～14.88%, beeswax 0.6～0.8%, polyethylene 0.24～0.32% mixes under 130 ℃, and it is standby that mistake 325 mesh standard sieves are made softening agent; Mixer is warming up to 130 ℃, and adding prepares softening agent, adds the above-mentioned powder that mixes then while stirring, and powder all adds the back to be continued to stir 12 hours, pours out the finish mix ingot of cooling; Above-mentioned material ingot is made the ceramic core green compact of some shapes according to mould by following technical parameter with the ceramic core shaper: 90-120 ℃ of material cylinder temperature; 90-100 ℃ of nozzle temperature; Compacting pressure 4-20Mpa; 2-10 second inject time; Dwell time 10-20 second; Die temperature 30-40 ℃; Green compact make alumina ceramic core through 1200-1400 ℃ of high-temperature roasting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101351890A CN100469731C (en) | 2006-12-29 | 2006-12-29 | Composite alumina ceramic core material adopting alumina hollow sphere and its forming preparation process |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101351890A CN100469731C (en) | 2006-12-29 | 2006-12-29 | Composite alumina ceramic core material adopting alumina hollow sphere and its forming preparation process |
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| Publication Number | Publication Date |
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| CN1994964A true CN1994964A (en) | 2007-07-11 |
| CN100469731C CN100469731C (en) | 2009-03-18 |
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| CNB2006101351890A Expired - Fee Related CN100469731C (en) | 2006-12-29 | 2006-12-29 | Composite alumina ceramic core material adopting alumina hollow sphere and its forming preparation process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102241515A (en) * | 2010-05-14 | 2011-11-16 | 河北勇龙邦大新材料有限公司 | Ceramic with light weight, high strength and high toughness and preparation method thereof |
| CN102266906A (en) * | 2010-06-02 | 2011-12-07 | 中国科学院金属研究所 | Preparation method of easy-to-remove ceramic mold core |
| CN102531648A (en) * | 2011-12-26 | 2012-07-04 | 北京航空航天大学 | Calcium oxide-based ceramic core for casting titanium alloy and manufacturing method thereof |
| CN103496999A (en) * | 2013-09-18 | 2014-01-08 | 清华大学 | Method for preparing porous ceramics from hollow ceramic ball |
| CN104446388A (en) * | 2014-11-10 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Method of improving liquidity of aluminum oxide mould core slurry |
| CN106116533A (en) * | 2016-06-23 | 2016-11-16 | 上海交通大学 | The preparation method of high-porosity alumina base ceramic core |
| CN111074178A (en) * | 2019-12-30 | 2020-04-28 | 珠海凯利得新材料有限公司 | Metal-based composite material and preparation method thereof |
-
2006
- 2006-12-29 CN CNB2006101351890A patent/CN100469731C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102241515A (en) * | 2010-05-14 | 2011-11-16 | 河北勇龙邦大新材料有限公司 | Ceramic with light weight, high strength and high toughness and preparation method thereof |
| CN102266906A (en) * | 2010-06-02 | 2011-12-07 | 中国科学院金属研究所 | Preparation method of easy-to-remove ceramic mold core |
| CN102266906B (en) * | 2010-06-02 | 2013-06-26 | 中国科学院金属研究所 | Preparation method of easy-to-remove ceramic mold core |
| CN102531648A (en) * | 2011-12-26 | 2012-07-04 | 北京航空航天大学 | Calcium oxide-based ceramic core for casting titanium alloy and manufacturing method thereof |
| CN102531648B (en) * | 2011-12-26 | 2013-09-11 | 北京航空航天大学 | Calcium oxide-based ceramic core for casting titanium alloy and manufacturing method thereof |
| CN103496999A (en) * | 2013-09-18 | 2014-01-08 | 清华大学 | Method for preparing porous ceramics from hollow ceramic ball |
| CN103496999B (en) * | 2013-09-18 | 2015-10-28 | 清华大学 | A kind of method adopting ceramic hollow ball to prepare porous ceramics |
| CN104446388A (en) * | 2014-11-10 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Method of improving liquidity of aluminum oxide mould core slurry |
| CN106116533A (en) * | 2016-06-23 | 2016-11-16 | 上海交通大学 | The preparation method of high-porosity alumina base ceramic core |
| CN111074178A (en) * | 2019-12-30 | 2020-04-28 | 珠海凯利得新材料有限公司 | Metal-based composite material and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN100469731C (en) | 2009-03-18 |
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