CN1718312A - Preparation method of quartz cast powder for precision casting - Google Patents
Preparation method of quartz cast powder for precision casting Download PDFInfo
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- CN1718312A CN1718312A CN 200510088358 CN200510088358A CN1718312A CN 1718312 A CN1718312 A CN 1718312A CN 200510088358 CN200510088358 CN 200510088358 CN 200510088358 A CN200510088358 A CN 200510088358A CN 1718312 A CN1718312 A CN 1718312A
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Abstract
A casting quartz powder for precise casting is prepared from quartz powder, refractory quartz powder, solid adhesive, refractory stabilizer, defoaming agent and coagulant. It features no cracking, no deforming high mechanical strength, high smooth surface and high size precision of its moulding shell or its cast workpiece.
Description
Technical field
The present invention relates to a kind of hot investment casting with material and preparation method thereof, relate in particular to a kind of quartz casting powder that is used for hot investment casting and preparation method thereof.
Background technology
Full form casting process is adopted in the moulding of precision casting, and not only mechanical strength is good to require shell, does not ftracture, and product has good duplicating, and casting back sand removal is easy, and cast(ing) surface is smooth, the dimensional accuracy height.Therefore, full form casting process requires very high to used casting opaque amount.Accurate casting powder is a kind of special investment mo(u)ld material, be particularly useful for casting dystectic noble metal artwork Ornament, as: industry precision parts such as platinum, iridium, palladium, rhodium, cobalt alloy, karat gold, sufficient gold, silver, copper, coloured glaze, stainless steel and Clocks, Watches and Glasses, automobile, aircraft, military project.Accurate casting powder is different according to composition and purposes, can be divided into land plaster and quartzy casting powder again.Quartzy casting powder main component be a quartz, has high temperature resistantly, and investment shell intensity is good, and cast(ing) surface is smooth, and the dimensional accuracy advantages of higher is applicable to the hot investment casting of refractory metal such as platinum, iridium, palladium, rhodium, cobalt alloy or alloy.Land plaster mainly is made up of quartzy and gypsum, be applicable to the casting of low-melting-point metals such as pure gold, karat gold, silver, copper or alloy, using at present more in the hot investment casting industry is land plaster, the casting powder of being mentioned in Chinese patent CN1037075C, CN1281831A, CN1109589C all is a land plaster, its main component is by gypsum and quartzy the composition, but the investment shell intensity of land plaster is slightly poor in the hot investment casting industry, it is smooth that cast(ing) surface is owed, precision is not high, can not satisfy high-precision casting requirement better.
Summary of the invention
The purpose of this invention is to provide a kind of quartz cast powder for precision casting and preparation method thereof, this quartz casting powder directly adds water in use and mixes stirring, need not to add in addition the liquid binding agent.
The designed quartz cast powder for precision casting of the present invention is evenly mixed with high quartz powder mixture, solid binder by silica flour to be formed, and can also the situation when using add high-temperature stabiliser, defoamer, coagulating agent; More than each component be Powdered, granularity mixes them at 1～45 μ m, promptly makes quartz cast powder for precision casting.Described solid binder is a solid phosphate, comprises monovalence, divalence, trivalent and polymeric phosphate.Described high-temperature stabiliser is metal oxide or aluminosilicate.Described coagulating agent is a kind of in set retarder or the coagulant, and set retarder is a water-soluble organic acid, and coagulant is a water-soluble inorganic salt.
Quartz cast powder for precision casting cost of manufacture provided by the present invention is low, easy to use, applied widely, its prepared shell has excellent mechanical intensity and excellent duplicating, does not ftracture, indeformable, not scab, collapsibility is good, and the cast(ing) surface that casting is come out is smooth, the dimensional accuracy height, the casting qualified rate height.
The specific embodiment
The designed quartz cast powder for precision casting of the present invention is made up of silica flour and high quartz powder mixture, solid binder, can also the situation when using be added with high-temperature stabiliser, defoamer, set retarder or coagulant.
(1) silica flour and high quartz powder mixture are got SiO
2Content is refined into silica flour greater than 99.3% quartz sand, then part silica flour is carried out high-temperature process and obtain the high quartz powder, silica flour and high quartz powder mixed obtain silica flour and high quartz powder mixture, the particle diameter of silica flour and high quartz powder is between 1～45 μ m.
(2) the solid binder binding agent is the important batching of accurate casting powder, and it directly influences shell and casting quality, production cycle and cost.It is binding agent that the present invention chooses solid phosphate, is blended directly in the powder after particle diameter is a powder between 1～45 μ m in that solid phosphate is ground into, and need not other dispense liquid binding agent.Described solid phosphate is meant monovalence, divalence, trivalent and polymeric phosphate, includes aluminum phosphate, potassium dihydrogen phosphate, magnesium monohydrogen phosphate, sodium polyphosphate, calgon, aluminium dihydrogen phosphate, tricresyl phosphate hydrogen aluminium, sodium pyrophosphate.
(3) high-temperature stabiliser is ground to form particle diameter is standby behind the powder between 1～45 μ m to high-temperature stabiliser.Because quartz because crystal transfer can produce expansion, adds high-temperature stabiliser and can suppress quartzy expansion when high temperature, prevents that shell from ftractureing when roasting, being out of shape, and guarantees stablizing of casting dimension.The present invention chooses metal oxide or aluminosilicate is a high-temperature stabiliser, includes aluminium oxide, magnesia, zircon, zirconia, kaolin, calcined kaolin, montmorillonite.
(4) coagulating agent is ground to form particle diameter is standby behind the powder between 1～45 μ m to coagulating agent.Coagulating agent is in order to control the setting rate of shell, and its addition is decided according to the actual needs of producing.Described coagulating agent is a kind of in set retarder or the coagulant, and set retarder is meant water-soluble organic acid, comprises oxalic acid, citric acid, malonic acid, hydroxysuccinic acid, maleic acid, succinic acid; Coagulant is meant water-soluble inorganic salt, comprises sodium chloride, potassium chloride, aluminium chloride, magnesium sulfate.
Above-mentioned silica flour evenly mixed in proportion with high quartz powder mixture, solid binder, high-temperature stabiliser, coagulating agent promptly obtain quartz cast powder for precision casting, wherein each components based on weight percentage calculates that silica flour and high quartz powder mixture account for 50.9%～99.9%, solid binder accounts for 0.1%～17%, high-temperature stabiliser accounts for 0～18%, defoamer accounts for 0～5%, and coagulating agent accounts for 0～13%.
The present invention is further described with non-limiting embodiment below.
Embodiment 1
Get the quartzy and high quartz powder of 655.90 grams, cross 1250 mesh sieves; Getting 3.5 gram aluminum phosphates, 9.1 gram sodium polyphosphates, 17.5 gram aluminium oxide, 3.5 gram defoamers and 10.5 gram sodium chloride powder pulverizes respectively and ground 325 mesh sieves; With above-mentioned pressed powder mixing and stirring, can make quartz cast powder for precision casting 700 grams.
Embodiment 2
Get the quartzy and high quartz powder of 676.20 grams, cross 1250 mesh sieves; Getting 5.6 gram aluminum phosphates, 2.1 gram sodium polyphosphates, 7 gram kaolin, 3.5 gram defoamers and 5.6 gram citric acid powder pulverizes respectively and ground 325 mesh sieves; With above-mentioned pressed powder mixing and stirring, can make quartz cast powder for precision casting 700 grams.
Embodiment 3
Get the quartzy and high quartz powder of 685.30 grams, cross 1250 mesh sieves; Getting 3.5 gram aluminum phosphates, 9.1 gram sodium polyphosphates and 2.1 gram defoamer powder pulverizes respectively and ground 325 mesh sieves; With above-mentioned pressed powder mixing and stirring, can make quartz cast powder for precision casting 700 grams.
Embodiment 4
Get the quartzy and high quartz powder of 669.34 grams, cross 1250 mesh sieves; Getting 12.6 gram sodium polyphosphates, 7 gram calcined kaolins, 0.56 gram defoamer and 10.5 gram sodium chloride powder pulverizes respectively and ground 325 mesh sieves; With above-mentioned pressed powder mixing and stirring, can make quartz cast powder for precision casting 700 grams.
Claims (6)
1, a kind of preparation method of quartz cast powder for precision casting is characterized in that: get SiO
2Content is refined into silica flour greater than 99.3% quartz sand, then part silica flour is carried out high-temperature process and obtains the high quartz powder, silica flour and high quartz powder is mixed obtain silica flour and high quartz powder mixture; Then silica flour is evenly mixed in proportion with high quartz powder mixture, solid binder, high-temperature stabiliser, defoamer, coagulating agent and promptly obtain quartz cast powder for precision casting, more than various components be the powder of particle diameter between 1～45 μ m, the ratio of various components count by weight percentage for: silica flour and high quartz powder mixture account for 50.9%～99.9%, solid binder accounts for 0.1%～17%, high-temperature stabiliser accounts for 0～18%, defoamer accounts for 0～5%, and coagulating agent accounts for 0～13%; Described solid binder is meant solid phosphate, comprises monovalence, divalence, trivalent and polymeric phosphate; Described high-temperature stabiliser is meant metal oxide or aluminosilicate; Described coagulating agent is a kind of in set retarder or the coagulant, and set retarder is meant water-soluble organic acid; Coagulant is meant water-soluble inorganic salt.
2, according to the preparation method of the said quartz cast powder for precision casting of claim 1, it is characterized in that: described solid binder is a kind of of aluminum phosphate, potassium dihydrogen phosphate, magnesium monohydrogen phosphate, sodium polyphosphate, calgon, aluminium dihydrogen phosphate, tricresyl phosphate hydrogen aluminium, sodium pyrophosphate.
3, according to the preparation method of the said quartz cast powder for precision casting of claim 1, it is characterized in that: described high-temperature stabiliser is a kind of of aluminium oxide, magnesia, zircon, zirconia, kaolin, calcined kaolin, montmorillonite.
4, according to the preparation method of the said quartz cast powder for precision casting of claim 1, it is characterized in that: described set retarder is meant a kind of of oxalic acid, citric acid, malonic acid, hydroxysuccinic acid, maleic acid, succinic acid.
5, according to the preparation method of the said quartz cast powder for precision casting of claim 1, it is characterized in that: described coagulant is meant a kind of of sodium chloride, potassium chloride, aluminium chloride, magnesium sulfate.
6, a kind of quartz cast powder for precision casting that obtains by the described preparation method's making of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510088358 CN1718312A (en) | 2005-08-02 | 2005-08-02 | Preparation method of quartz cast powder for precision casting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510088358 CN1718312A (en) | 2005-08-02 | 2005-08-02 | Preparation method of quartz cast powder for precision casting |
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| CN1718312A true CN1718312A (en) | 2006-01-11 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272988A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | High-tensile strength molding sand and manufacturing method |
| CN104150953A (en) * | 2014-08-01 | 2014-11-19 | 锦州大业炭素制品有限公司 | Oxidation resistance treatment method of graphite jig for priducing quartz crucibles |
| CN106238669A (en) * | 2016-07-13 | 2016-12-21 | 沈阳工业大学 | The preparation method of foundry water-soluble core compound |
| CN107498003A (en) * | 2017-08-10 | 2017-12-22 | 合肥市田源精铸有限公司 | A kind of processing method of light wear-resistant steel casting |
| CN108659928A (en) * | 2018-06-04 | 2018-10-16 | 安徽索立德铸业有限公司 | A kind of lubrication powder for hot investment casting part |
| CN109909445A (en) * | 2019-01-25 | 2019-06-21 | 上海交通大学 | Inhibit the ceramic shell and preparation method of the scab of high-temperature alloy turbine blade surface |
-
2005
- 2005-08-02 CN CN 200510088358 patent/CN1718312A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272988A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | High-tensile strength molding sand and manufacturing method |
| CN104150953A (en) * | 2014-08-01 | 2014-11-19 | 锦州大业炭素制品有限公司 | Oxidation resistance treatment method of graphite jig for priducing quartz crucibles |
| CN104150953B (en) * | 2014-08-01 | 2017-01-11 | 锦州大业炭素制品有限公司 | Oxidation resistance treatment method of graphite jig for priducing quartz crucibles |
| CN106238669A (en) * | 2016-07-13 | 2016-12-21 | 沈阳工业大学 | The preparation method of foundry water-soluble core compound |
| CN107498003A (en) * | 2017-08-10 | 2017-12-22 | 合肥市田源精铸有限公司 | A kind of processing method of light wear-resistant steel casting |
| CN108659928A (en) * | 2018-06-04 | 2018-10-16 | 安徽索立德铸业有限公司 | A kind of lubrication powder for hot investment casting part |
| CN109909445A (en) * | 2019-01-25 | 2019-06-21 | 上海交通大学 | Inhibit the ceramic shell and preparation method of the scab of high-temperature alloy turbine blade surface |
| CN109909445B (en) * | 2019-01-25 | 2021-01-12 | 上海交通大学 | Ceramic shell for inhibiting sand sticking on surface of high-temperature alloy turbine blade and preparation method thereof |
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