CN1739882A - Cast powder for casting high melting point metal and its usage - Google Patents
Cast powder for casting high melting point metal and its usage Download PDFInfo
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- CN1739882A CN1739882A CN 200510019444 CN200510019444A CN1739882A CN 1739882 A CN1739882 A CN 1739882A CN 200510019444 CN200510019444 CN 200510019444 CN 200510019444 A CN200510019444 A CN 200510019444A CN 1739882 A CN1739882 A CN 1739882A
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Abstract
The present invention relates to one kind of lost wax precise casting material, and is especially one kind of cast powder for casting high melting point metal and its usage. The cast powder consists of solid powder and liquid fast drying agent, the solid powder includes quartz powder and high temperature quartz, and the liquid fast drying agent includes adhesive, liquid surfactant and water. The solid powder and the liquid fast drying agent are mixed through powerful stirring, and the mixture is vacuum debubbled, cured and roasted to form the cast powder. The cast powder is cast and the casting is washed to obtain the required casting. The cast powder has stable quality, excellent performance and low cost, and may be used in producing mold casing with high mechanical strength, no roast crack, no deformation, excellent reproducibility and excellent low temperature collapsibility. The cast product is smooth, precise and high in quality.
Description
Technical field
The present invention relates to a kind of dewax hot investment casting material, relate in particular to a kind of casting powder and using method thereof that is used for casting high melting point metal.
Background technology
The lost-wax process hot investment casting also claims model casting, is a kind of precision casting process that cuts less or do not have cutting, is the technology of an excellence in the hot investment casting industry, and its application is very extensive.It is not only applicable to the hot investment casting of all kinds, various alloys, and the casting dimension accuracy of producing, surface quality are than other casting method height, even other casting method be difficult to cast complexity, high temperature resistant, the foundry goods that is not easy to process, all can adopt model casting to cast.The precision-investment casting biggest advantage is exactly because investment-casting has very high dimensional accuracy and surface smoothness.
The used casting powder of model casting is divided into multiple again according to its technological requirement, wherein be used to cast the platinum casting powder of high-melting-point noble metal jewelries such as platinum, iridium, palladium, rhodium, because the particularity of foundry goods, quality requirement is the highest.But the platinum casting powder on the China market mainly all is an external product at present, and price is very high.The platinum casting powder of a small amount of domestic production is the problem of ubiquity quality instability, poor-performing again, can't satisfy demand of practical production.
Using at present more in the hot investment casting industry is land plaster, in Chinese patent ZL97108121, ZL94107410, ZL00119619 disclosed to the casting powder be land plaster, its main component is by gypsum and quartzy the composition.Because the key component of land plaster is pressed powder, cast back investment shell intensity is slightly poor, and it is smooth that cast(ing) surface is owed, and precision is not high, can not satisfy high-precision casting requirement better.
Summary of the invention
Problem to be solved by this invention is to propose a kind of casting powder that is used for casting high melting point metal at above-mentioned prior art, and it makes the cast(ing) surface of final casting smooth, and the precision height can satisfy high-precision casting requirement well.
Another object of the present invention provides the using method of the casting powder of this casting high melting point metal.
The present invention for the solution that problem adopts of the above-mentioned proposition of solution is: a kind of casting powder that is used for casting high melting point metal, it is characterized in that forming by pressed powder and liquid quick dry agent, pressed powder 98～98.5 weight portions wherein, liquid quick dry agent 1.5～2 weight portions, described pressed powder is made up of silica flour and high quartz, high quartz accounts for 3～30% (weight) of pressed powder, and the composition of liquid quick dry agent and weight percentage thereof are that binding agent 23%～92.3%, liquid surfactant 0～38.5% and water 0～77% are through mixing.
Press such scheme, described binding agent be liquid phosphoric acid salt or silica sol liquid or hydrolyzing ethyl silicate liquid or waterglass any one;
Press such scheme, described liquid surfactant be glycerine or silane or low-molecular-weight polyacrylic acid salt any one,
Press such scheme, described pressed powder particle mean size is 8～10 μ m.
The technical scheme that the present invention is used for the casting powder using method of casting high melting point metal is:
At first get material, take by weighing 98～98.5 parts pressed powder, the liquid quick dry agent that adds 35～40 parts of water and 1.5～2 parts, forming of pressed powder by silica flour and high quartz, high quartz accounts for 3～30% (weight) of pressed powder, the composition of liquid quick dry agent and weight percentage thereof are binding agent 23%～92.3%, liquid surfactant 0～38.5% and water 0～77% are through mixing, they are evenly mixed the powerful 10min of stirring, vacuum degassing bubble 3min pours into steel cylinder with slurry, again vacuum degassing bubble 2min, place and solidify 4h on the absorbing water powder, advance stove roasting 8h, take out casting, clean at last and promptly get the foundry goods of wanting.
The invention has the beneficial effects as follows: described casting opaque amount is stable, excellent performance, production cost is low, and its prepared shell mechanical strength is good, and roasting do not ftracture, indeformable, have excellent duplicating and good low temperature collapsibility, the cast(ing) surface that casting is come out is very smooth, no burr, no joint flash, the dimensional accuracy height does not have waste product substantially.
The specific embodiment
One, the component that is used for the casting powder of casting high melting point metal
The casting powder that is used for casting high melting point metal that the present invention is designed is made up of pressed powder and liquid quick dry agent two parts.
(1) pressed powder is made up of silica flour and high quartz.Silica flour is to utilize SiO
2Content is made with extra care through separation, purification with after pulverizing greater than 99.6% quartz sand and is formed high-purity ground quartz.High quartz is to utilize glass sand after 1450 ℃～1750 ℃ high-temperature calcinations, and mechanical crushing is ground and formed again.The pressed powder part that silica flour and the even mixing of high quartz are promptly obtained casting powder.The average grain diameter of above-mentioned pressed powder is between 8～10 μ m.
(2) liquid quick dry agent liquid quick dry agent is the important component part of casting powder, it directly affects the operating characteristics and the casting quality of product, the used liquid quick dry agent key component of the present invention is a binding agent, and binding agent can be in liquid phosphoric acid aluminum dihydrogen, liquid phosphoric acid three hydrogen aluminium, silica sol liquid, silester, the waterglass any one.Can also add liquid surfactant in the described liquid quick dry agent, liquid surfactant is the water-soluble active agent, comprises silane, glycerine, low-molecular-weight polyacrylic acid salt.Above-mentioned pressed powder and liquid quick dry agent can be used.
Two, the using method of casting powder
At first get material, take by weighing 98～98.5 parts pressed powder, the liquid quick dry agent that adds 35～40 parts of water and 1.5～2 parts, forming of pressed powder by silica flour and high quartz, high quartz accounts for 3～30% (weight) of pressed powder, the composition of liquid quick dry agent and weight percentage thereof are binding agent 23%～92.3%, liquid surfactant 0～38.5% and water 0～77% are through mixing, they are evenly mixed the powerful 10min of stirring, vacuum degassing bubble 3min pours into steel cylinder with slurry, again vacuum degassing bubble 2min, place and solidify 4h on the absorbing water powder, advance stove roasting 8h, take out casting, clean at last and promptly get the foundry goods of wanting.
The present invention is further described with non-limiting embodiment below.
Embodiment 1
Liquid quick dry agent (silane: liquid phosphoric acid three hydrogen aluminium: water=1: 5: 7) 13 parts
630 parts of silica flours
70 parts of high quartzs
250 parts in water (more than be weight portion)
After getting 250 parts of water, 13 parts of liquid quick dry agents according to the above ratio and mixing, adds 700 parts of pressed powders, powerful stirring 10min; Vacuum degassing bubble 3min pours into steel cylinder with slurry, and vacuum degassing bubble 2min places and solidifies 4h on the absorbing water powder again, advances stove roasting 8h, takes out casting PT950.After cleaning finished, cast(ing) surface was very smooth, no burr, and size is accurate, qualification rate 100%.
Embodiment 2
Liquid quick dry agent (silica sol liquid: water=3: 10) 13 parts
630 parts of silica flours
70 parts of high quartzs
250 parts in water (more than be weight portion)
After getting 250 parts of water, 13 parts of liquid quick dry agents according to the above ratio and mixing, adds 700 parts of pressed powders, powerful stirring 10min; Vacuum degassing bubble 3min pours into steel cylinder with slurry, and vacuum degassing bubble 2min places and solidifies 4h on the absorbing water powder again, advances stove roasting 8h, takes out casting PT950.After cleaning finished, cast(ing) surface was very smooth, no burr, and size is accurate, qualification rate 99.2%.
Embodiment 3
Liquid quick dry agent (silane: silester: water=5: 5: 3) 13 parts
630 parts of silica flours
70 parts of high quartzs
250 parts in water (more than be weight portion)
After getting 250 parts of water, 13 parts of liquid quick dry agents according to the above ratio and mixing, adds 700 parts of pressed powders, powerful stirring 10min; Vacuum degassing bubble 3min pours into steel cylinder with slurry, and vacuum degassing bubble 2min places and solidifies 4h on the absorbing water powder again, advances stove roasting 8h, takes out casting PT950.After cleaning finished, cast(ing) surface was very smooth, no burr, and size is accurate, qualification rate 99.5%.
Embodiment 4
Liquid quick dry agent (silester: water=10: 3) 13 parts
630 parts of silica flours
70 parts of high quartzs
250 parts in water (more than be weight portion)
After getting 250 parts of water, 13 parts of liquid quick dry agents according to the above ratio and mixing, adds 700 parts of pressed powders, powerful stirring 10min; Vacuum degassing bubble 3min pours into steel cylinder with slurry, and vacuum degassing bubble 2min places and solidifies 4h on the absorbing water powder again, advances stove roasting 8h, takes out casting PT950.After cleaning finished, cast(ing) surface was very smooth, no burr, and size is accurate, qualification rate 99.4%.
Embodiment 5
Liquid quick dry agent (low-molecular polypropylene acid sodium: silica sol liquid: water=2: 6: 5) 13 parts
630 parts of silica flours
70 parts of high quartzs
250 parts in water (more than be weight portion)
After getting 250 parts of water, 13 parts of liquid quick dry agents according to the above ratio and mixing, adds 700 parts of pressed powders, powerful stirring 10min; Vacuum degassing bubble 3min pours into steel cylinder with slurry, and vacuum degassing bubble 2min places and solidifies 4h on the absorbing water powder again, advances stove roasting 8h, takes out casting PT950.After cleaning finished, cast(ing) surface was very smooth, no burr, and size is accurate, qualification rate 99.5%.
Embodiment 6
Liquid quick dry agent (silane: silica sol liquid: water=2: 6: 5) 13 parts
600 parts of silica flours
100 parts of high quartzs
250 parts in water (more than be weight portion)
After getting 250 parts of water, 13 parts of liquid quick dry agents according to the above ratio and mixing, adds 700 parts of pressed powders, powerful stirring 10min; Vacuum degassing bubble 3min pours into steel cylinder with slurry, and vacuum degassing bubble 2min places and solidifies 4h on the absorbing water powder again, advances stove roasting 8h, takes out casting PT950.After cleaning finished, cast(ing) surface was very smooth, no burr, and size is accurate, qualification rate 100%.
Embodiment 7
Liquid quick dry agent (silane: liquid phosphoric acid three hydrogen aluminium: water=5: 6: 2) 13 parts
500 parts of silica flours
200 parts of high quartzs
250 parts in water (more than be weight portion)
After getting 250 parts of water, 13 parts of liquid quick dry agents according to the above ratio and mixing, adds 700 parts of pressed powders, powerful stirring 10min; Vacuum degassing bubble 3min pours into steel cylinder with slurry, and vacuum degassing bubble 2min places and solidifies 4h on the absorbing water powder again, advances stove roasting 8h, takes out casting PT950.After cleaning finished, cast(ing) surface was very smooth, no burr, and size is accurate, qualification rate 100%.
Embodiment 8
Liquid quick dry agent (silane: liquid phosphoric acid aluminum dihydrogen=5: 8) 13 parts
650 parts of silica flours
50 parts of high quartzs
260 parts in water (more than be weight portion)
After getting 260 parts of water, 13 parts of liquid quick dry agents according to the above ratio and mixing, adds 700 parts of pressed powders, powerful stirring 10min; Vacuum degassing bubble 3min pours into steel cylinder with slurry, and vacuum degassing bubble 2min places and solidifies 4h on the absorbing water powder again, advances stove roasting 8h, takes out casting PT950.After cleaning finished, cast(ing) surface was very smooth, no burr, and size is accurate, qualification rate 100%.
Claims (5)
1, a kind of casting powder that is used for casting high melting point metal, it is characterized in that forming by pressed powder and liquid quick dry agent, pressed powder 98～98.5 weight portions wherein, liquid quick dry agent 1.5～2 weight portions, described pressed powder is made up of silica flour and high quartz, high quartz accounts for 3～30% (weight) of pressed powder, and the composition of liquid quick dry agent and weight percentage thereof are that binding agent 23%～92.3%, liquid surfactant 0～38.5% and water 0～77% are through mixing.
2, by the described casting powder that is used for casting high melting point metal of claim 1, it is characterized in that described binding agent be liquid phosphoric acid salt or silica sol liquid or hydrolyzing ethyl silicate liquid or waterglass any one.
3, by the described casting powder that is used for casting high melting point metal of claim 1, it is characterized in that described liquid surfactant be glycerine or silane or low-molecular-weight polyacrylic acid salt any one.
4,, it is characterized in that described pressed powder particle mean size is 8～10 μ m by the described casting powder that is used for casting high melting point metal of claim 1.
5. the described using method that is used for the casting powder of casting high melting point metal of claim 1, it is characterized in that, at first get material, take by weighing 98～98.5 parts pressed powder, the liquid quick dry agent that adds 35～40 parts of water and 1.5～2 parts, forming of pressed powder by silica flour and high quartz, high quartz accounts for 3～30% (weight) of pressed powder, the composition of liquid quick dry agent and weight percentage thereof are binding agent 23%～92.3%, liquid surfactant 0～38.5% and water 0～77% are through mixing, they are evenly mixed the powerful 10min of stirring, vacuum degassing bubble 3min pours into steel cylinder with slurry, again vacuum degassing bubble 2min, place and solidify 4h on the absorbing water powder, advance stove roasting 8h, take out casting, clean at last and promptly get the foundry goods of wanting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100194440A CN1319668C (en) | 2005-09-16 | 2005-09-16 | Cast powder for casting high melting point metal and its usage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100194440A CN1319668C (en) | 2005-09-16 | 2005-09-16 | Cast powder for casting high melting point metal and its usage |
Publications (2)
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| CN1739882A true CN1739882A (en) | 2006-03-01 |
| CN1319668C CN1319668C (en) | 2007-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100194440A Expired - Fee Related CN1319668C (en) | 2005-09-16 | 2005-09-16 | Cast powder for casting high melting point metal and its usage |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052228A (en) * | 2017-03-30 | 2017-08-18 | 惠州市吉邦精密技术有限公司 | A kind of high-efficiency and precision casts shell coating quick dry agent processed |
| WO2019058071A1 (en) * | 2017-09-22 | 2019-03-28 | Safran | Casting slurry |
| CN112275993A (en) * | 2020-10-29 | 2021-01-29 | 兰州理工大学 | Low-temperature gel casting material and preparation method thereof |
| RU2774243C2 (en) * | 2017-09-22 | 2022-06-16 | Сафран | Casting mixture |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU610604A1 (en) * | 1975-04-10 | 1978-06-15 | Харьковский Ордена Ленина Политехнический Институт Им.В.И.Ленина | Current-conducting coating for making ceramic casting moulds |
| CN1043897A (en) * | 1989-01-03 | 1990-07-18 | 冯圣贤 | A kind of compound method of pattern casting superficial layer coating |
| CN1033433C (en) * | 1992-04-20 | 1996-12-04 | 太原洗涤剂厂 | Special surfactant for precision-investment casting |
| CN1037075C (en) * | 1994-07-14 | 1998-01-21 | 苏贝蒂 | Mould cast powder for precision found |
| JP3529523B2 (en) * | 1995-11-17 | 2004-05-24 | 株式会社ジーシー | Dental phosphate investment composition |
| CN1109589C (en) * | 1997-06-24 | 2003-05-28 | 戴端维 | Practical precision investment casting powder and its forming technique |
| CN1045555C (en) * | 1997-06-30 | 1999-10-13 | 浙江大学 | Simple casing tech by lost wax casting |
| US6551396B1 (en) * | 2000-03-06 | 2003-04-22 | Den-Mat Corporation | Phosphate investment compositions |
-
2005
- 2005-09-16 CN CNB2005100194440A patent/CN1319668C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052228A (en) * | 2017-03-30 | 2017-08-18 | 惠州市吉邦精密技术有限公司 | A kind of high-efficiency and precision casts shell coating quick dry agent processed |
| WO2019058071A1 (en) * | 2017-09-22 | 2019-03-28 | Safran | Casting slurry |
| FR3071423A1 (en) * | 2017-09-22 | 2019-03-29 | Safran | FOUNDRY BARBOTINE |
| CN111148584A (en) * | 2017-09-22 | 2020-05-12 | 赛峰集团 | Casting slurry |
| RU2774243C2 (en) * | 2017-09-22 | 2022-06-16 | Сафран | Casting mixture |
| US11833579B2 (en) | 2017-09-22 | 2023-12-05 | Safran | Casting slurry |
| CN112275993A (en) * | 2020-10-29 | 2021-01-29 | 兰州理工大学 | Low-temperature gel casting material and preparation method thereof |
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| CN1319668C (en) | 2007-06-06 |
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Granted publication date: 20070606 Termination date: 20100916 |