CN104646605B - A kind of Cast aluminium alloy gold coating - Google Patents
A kind of Cast aluminium alloy gold coating Download PDFInfo
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- CN104646605B CN104646605B CN201510097368.9A CN201510097368A CN104646605B CN 104646605 B CN104646605 B CN 104646605B CN 201510097368 A CN201510097368 A CN 201510097368A CN 104646605 B CN104646605 B CN 104646605B
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- coating
- aluminium alloy
- cast aluminium
- attapulgite
- alloy gold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention belongs to field of functional coatings, be specifically related to a kind of Cast aluminium alloy gold coating.By weight percentage, this coating includes: attapulgite 30～40%, ethylene vinyl acetate 10～20%, silica flour 15～30%, rosin ester 10～20%, carboxymethyl cellulose 3～8%, ethanol balance.It is an advantage of the current invention that: 1) coating of the present invention possesses preferable viscosity, good high-temperature resistant property and elevated temperature strength, and especially add after the attapulgite of silanization treatment, further improve the performance of coating.2) nano boron nitride powder that the present invention selects improves the heat conductivility of coating, improves the setting rate of foundry goods, thus reduces the tendency of aluminium alloy castings pore and micro-crack.Further, the nano boron nitride powder of interpolation at high temperature can improve coating and the binding strength of molding sand and compactness, reduces the porosity in coating.
Description
Technical field
The invention belongs to field of functional coatings, be specifically related to a kind of Cast aluminium alloy gold coating.
Background technology
As structural material, compared with iron and steel, it is little that aluminium alloy has density, specific strength advantages of higher, day by day increases at field consumptions such as Aeronautics and Astronautics, automobile, medical apparatus and instruments.In aluminium alloy castings production process, especially with in porose aluminium alloy castings manufacture process, substantial amounts of hole defect can be produced near pore structure, cause declining to a great extent of aluminium alloy castings performance especially mechanical property and sealing property, cause yield rate low, mass energy is wasted, and brings loss to production.Research for aluminium alloy Hole defect becomes the study hotspot of casting aluminum alloy already, but the most effectively process is to control or to eliminate this type of hole defect.
CN103752809 A discloses a kind of method eliminating aluminium alloy castings hole defect, and specifically disclose techniques below feature: use hairbrush or felt-cloth uniformly to brush at chill in deployed varnish before lower core, when varnish is the most dry, uniformly sprinkle dry sand, natural drying 10～15 minutes, make dry sand stick on chill；Chill is placed in sand mold；Again foundry goods is poured into a mould.
CN102228979 A discloses the casting method of a kind of major diameter fluid coupling aluminum alloy impeller assembly, and specifically disclose techniques below feature: in casting mold cavity, place chill, chill first coats Oleum Verniciae fordii, sprinkle quartz sand, it is positioned over appropriate location in die cavity after drying again, then foundry goods is poured into a mould.
In the scheme of above-mentioned prior art, varnish and Oleum Verniciae fordii belong to common coating, and Cast aluminium alloy gold coating should possess following performance requirement, i.e. coating should have good wettability and caking property, good high-temperature resistant property and elevated temperature strength.
Summary of the invention
The present invention is directed to the deficiency of prior art existence and a kind of Cast aluminium alloy gold coating is provided, the present invention is to chill sprayed coating, make cold ironing surface scab effective, at high temperature will not come off because of fluid scouring, thus eliminate the source that hole defect is formed, and then this type of hole defect is completely eliminated.
The technical scheme realizing the object of the invention is: a kind of Cast aluminium alloy gold coating, by weight percentage, this coating includes: attapulgite 30～40%, ethylene-vinyl acetate 10～20%, silica flour 15～30%, rosin ester 10～20%, carboxymethyl cellulose 3～8%, ethanol balance.
Preferably, the Cast aluminium alloy gold coating of the present invention, by weight percentage, this coating consists of the following composition: attapulgite 30%, ethylene-vinyl acetate 20%, silica flour 15%, rosin ester 20%, carboxymethyl cellulose 8%, ethanol balance.
Further, attapulgite of the present invention is through silanization treatment, and concrete silanization treatment step is: 1) attapulgite and silicone oil are scattered in alcohol solvent for 1:3 in mass ratio；2) stir 2～4 hours at bath temperature 40～60 DEG C, be then evaporated at bath temperature 90 DEG C～95 DEG C；3) it is transferred in Muffle furnace carry out roasting.
It is highly preferred that the Cast aluminium alloy gold coating of the present invention, by weight percentage, this coating also includes: nano boron nitride powder 0.5～2%.
Coating is preferably uniformly brushed on the surface of chill by the present invention with hairbrush or felt-cloth, and brushing thickness is 0.3～0.6mm.When coating is the most dry, sprinkle dry sand uniformly, make dry sand stick on chill.Described dry sand particle diameter is less than 200 mesh.
It is an advantage of the current invention that:
1) coating of the present invention possesses preferable viscosity, good high-temperature resistant property and elevated temperature strength, especially adds after the attapulgite of silanization treatment, further improves the performance of coating；
2) nano boron nitride powder that the present invention selects improves the heat conductivility of coating, improves the setting rate of foundry goods, thus reduces the tendency of aluminium alloy castings pore and micro-crack.Further, the nano boron nitride powder of interpolation at high temperature can improve coating and the binding strength of molding sand and compactness, reduces the porosity in coating.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described through.
One Cast aluminium alloy gold coating of the present invention, by weight percentage, this coating includes: attapulgite 30～40%, ethylene-vinyl acetate 10～20%, silica flour 15～30%, rosin ester 10～20%, carboxymethyl cellulose 3～8%, ethanol balance.
Obtained coating selection hairbrush or felt-cloth uniformly being brushed on the surface of chill, brushing thickness is 0.3～0.6mm.When coating is the most dry, sprinkle dry sand uniformly, make dry sand stick on chill.The dry sand particle diameter selected is less than 200 mesh.
Embodiment
1
A kind of Cast aluminium alloy gold coating, consists of the following composition: attapulgite 30%, ethylene-vinyl acetate 20%, silica flour 15%, rosin ester 20%, carboxymethyl cellulose 8%, ethanol balance.
Embodiment
2
A kind of Cast aluminium alloy gold coating, consists of the following composition: attapulgite 40%, ethylene-vinyl acetate 16%, silica flour 20%, rosin ester 15%, carboxymethyl cellulose 5%, ethanol balance.
Embodiment
3
A kind of Cast aluminium alloy gold coating, consists of the following composition: attapulgite 34%, ethylene-vinyl acetate 10%, silica flour 30%, rosin ester 10%, carboxymethyl cellulose 3%, ethanol balance.
Embodiment
4
In order to improve the heat conductivility of coating, reduce aluminium alloy castings pore and the tendency of micro-crack.The Cast aluminium alloy gold coating of the present invention also includes: nano boron nitride powder 0.5～2%.
When this coating specifically used, preferably uniformly being brushed on the surface of chill by coating with hairbrush or felt-cloth, brushing thickness is 0.3～0.6mm.When coating is the most dry, sprinkle dry sand uniformly, make dry sand stick on chill.Described dry sand particle diameter is less than 200 mesh.
In embodiment 1-4, in order to improve the dispersive property of attapulgite, thus improve the performance of coating further, by attapulgite through silanization treatment, concrete silanization treatment step is: 1) attapulgite and silicone oil are scattered in alcohol solvent for 1:3 in mass ratio；2) stir 2～4 hours at bath temperature 40～60 DEG C, be then evaporated at bath temperature 90 DEG C～95 DEG C；3) it is transferred in Muffle furnace carry out roasting.Roasting condition is: sintering temperature 300～450 DEG C, roasting time 3～6 hours.
Desirable embodiment according to the present invention is enlightenment above, and by above-mentioned description, related personnel can carry out various change and amendment completely in the range of without departing from this invention technological thought.The content that the technical scope of this invention is not limited in description, it is necessary to determine technical scope according to right.
Claims (6)
1. a Cast aluminium alloy gold coating, by weight percentage, this coating includes: attapulgite 30～40%, ethylene-vinyl acetate 10～20%, silica flour 15～30%, rosin ester 10～20%, carboxymethyl cellulose 3～8%, ethanol balance, described attapulgite is through silanization treatment, and concrete silanization treatment step is: 1) attapulgite and silicone oil are scattered in alcohol solvent for 1:3 in mass ratio；2) stir 2～4 hours at bath temperature 40～60 DEG C, be then evaporated at bath temperature 90 DEG C～95 DEG C；3) it is transferred in Muffle furnace carry out roasting.
A kind of Cast aluminium alloy gold coating the most according to claim 1, it is characterized in that: by weight percentage, this coating consists of the following composition: attapulgite 30%, ethylene-vinyl acetate 20%, silica flour 15%, rosin ester 20%, carboxymethyl cellulose 8%, ethanol balance.
A kind of Cast aluminium alloy gold coating the most according to claim 1, it is characterised in that: by weight percentage, this coating also includes: nano boron nitride powder 0.5～2%.
4. according to a kind of Cast aluminium alloy gold coating described in claim 1 or 3, it is characterised in that: uniformly being brushed on the surface of chill by coating with hairbrush or felt-cloth, brushing thickness is 0.3～0.6mm.
A kind of Cast aluminium alloy gold coating the most according to claim 4, it is characterised in that: when coating is the most dry, sprinkle dry sand uniformly, make dry sand stick on chill.
A kind of Cast aluminium alloy gold coating the most according to claim 5, it is characterised in that: described dry sand particle diameter is less than 200 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510097368.9A CN104646605B (en) | 2015-03-05 | 2015-03-05 | A kind of Cast aluminium alloy gold coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510097368.9A CN104646605B (en) | 2015-03-05 | 2015-03-05 | A kind of Cast aluminium alloy gold coating |
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| CN104646605A CN104646605A (en) | 2015-05-27 |
| CN104646605B true CN104646605B (en) | 2016-07-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391995A (en) * | 2016-04-27 | 2017-02-15 | 霍邱县鑫瑞金属制品有限责任公司 | High-thermal stability water-based EPC paint for magnesium alloy casting and preparation method thereof |
| CN106111951B (en) * | 2016-06-29 | 2018-01-19 | 江苏康柏斯机械科技有限公司 | A kind of casting technique of aluminium alloy wheel hub |
| CN107243594A (en) * | 2017-06-14 | 2017-10-13 | 合肥市旺友门窗有限公司 | A kind of used in aluminium alloy casting insulating refractory coating and preparation method thereof |
| CN108129920A (en) * | 2017-12-06 | 2018-06-08 | 安徽金达节能材料发展有限公司 | One kind is used for aluminium alloy casting metal coating |
| CN108555228A (en) * | 2017-12-06 | 2018-09-21 | 安徽金达节能材料发展有限公司 | One kind being used for aluminium alloy coating |
| CN109848364B (en) * | 2018-12-11 | 2020-09-18 | 商丘师范学院 | Boron nitride coating for pressure casting and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1363436A (en) * | 2001-12-11 | 2002-08-14 | 上海交通大学 | Casting paint for adsorptive lost Al-alloy mould and its preparing process |
| CN102357648A (en) * | 2011-10-13 | 2012-02-22 | 李华山 | Chill coating for casting |
| CN102836951A (en) * | 2012-08-31 | 2012-12-26 | 太仓科博尔精密铸业有限公司 | Aluminum alloy EPC (Expendable Pattern Casting) coating and preparation method thereof |
| CN103752809A (en) * | 2014-01-07 | 2014-04-30 | 南通宏德机电有限公司 | Method for eliminating aluminum alloy casting pore defects |
| CN104128557A (en) * | 2014-07-26 | 2014-11-05 | 宁国市大泉机械有限公司 | Aluminum alloy casting coating |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003088938A (en) * | 2001-09-14 | 2003-03-25 | Suzuki Motor Corp | Method for heightening heat resistance of casting |
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- 2015-03-05 CN CN201510097368.9A patent/CN104646605B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1363436A (en) * | 2001-12-11 | 2002-08-14 | 上海交通大学 | Casting paint for adsorptive lost Al-alloy mould and its preparing process |
| CN102357648A (en) * | 2011-10-13 | 2012-02-22 | 李华山 | Chill coating for casting |
| CN102836951A (en) * | 2012-08-31 | 2012-12-26 | 太仓科博尔精密铸业有限公司 | Aluminum alloy EPC (Expendable Pattern Casting) coating and preparation method thereof |
| CN103752809A (en) * | 2014-01-07 | 2014-04-30 | 南通宏德机电有限公司 | Method for eliminating aluminum alloy casting pore defects |
| CN104128557A (en) * | 2014-07-26 | 2014-11-05 | 宁国市大泉机械有限公司 | Aluminum alloy casting coating |
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Effective date of registration: 20230913 Address after: No. 415 Kaiyuan Road, Fenghua District, Ningbo City, Zhejiang Province, 315500 Patentee after: Ningbo Fenghua Wansheng Aluminum Co.,Ltd. Address before: 215400 1 1 Beijing West Road, Taicang Economic Development Zone, Suzhou, Jiangsu. Patentee before: SUZHOU YUXI NEW MATERIAL TECHNOLOGY Co.,Ltd. |