CN109836861A - A kind of preparation method of casting magnesium aluminum alloy coating - Google Patents
A kind of preparation method of casting magnesium aluminum alloy coating Download PDFInfo
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- CN109836861A CN109836861A CN201711194716.XA CN201711194716A CN109836861A CN 109836861 A CN109836861 A CN 109836861A CN 201711194716 A CN201711194716 A CN 201711194716A CN 109836861 A CN109836861 A CN 109836861A
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Abstract
The present invention relates to a kind of preparation method of casting magnesium aluminum alloy coating, preparation step is as follows: (1) ball mill is added in attapulgite, high-purity carbon black and carries out ground and mixed, be sieved after grinding；(2) the distilled water stirring of mass ratio 2:1 is added in the mixed raw material after being ground up, sieved, the alcohol solvent of mass ratio 1:2-1:3 is added later, and 2.5-4.5h is stirred under 45-65 DEG C of water-bath, then it is evaporated at 85-95 DEG C again, it is finally transferred to high temperature furnace roasting, silanization carbon black attapulgite powder is made；(3) silanization carbon black attapulgite powder, silicon powder, rosin ester, 30s nitrocellulose liquid, methacrylic acid, polyphenyl acrylamide, carboxymethyl cellulose and ethyl alcohol are mixed and is put into spheroidal graphite 2-3h in wet ball mill, taken out and magnesium alloy manufacture coating is made；Coating of the invention has preferable viscosity, good high-temperature resistant property and elevated temperature strength, is especially added to after the attapulgite of silanization treatment, further improves the performance of coating.
Description
Technical field
The present invention relates to functional paint technical fields, and in particular to a kind of preparation method of casting magnesium aluminum alloy coating.
Background technique
As structural material, compared with steel, magnesium alloy has many advantages, such as that density is small, and specific strength is high, in aviation, boat
It, the fields dosage such as automobile, medical instrument increasingly increases.During magnesium alloy castings production, especially with porose
In magnesium alloy casting manufacturing process, a large amount of hole defect can be generated near pore structure, cause magnesium alloy cast properties
Especially mechanical property and sealing performance declines to a great extent, and causes yield rate low, and mass energy waste to production brings loss.It is right
Become the research hotspot of casting magnesium alloy already in the research of magnesium alloy mesoporous hole defect, but never has very much
The process of effect is to control or eliminate such hole defect.
CN103752809 A disclose it is a kind of eliminate magnesium alloy casting hole defect method, and specifically disclose with
Lower technical characteristic: uniformly being brushed deployed varnish in chill using hairbrush or felt-cloth before lower core, when varnish is not dry,
Dry sand is uniformly sprinkled, spontaneously dries 10~15 minutes, is adhered to dry sand on chill；Chill is placed in sand mold；Again to casting
Part is poured.
In the scheme of above-mentioned prior art, varnish and tung oil belong to common coating, and cast magnesium alloy coating
Should have following performance requirements, i.e. coating should have good wetability and caking property, and good high-temperature resistant property and high temperature are strong
Degree.
Summary of the invention
The invention provides the following technical scheme: a kind of preparation method of casting magnesium aluminum alloy coating, preparation step are as follows:
(1) ball mill is added in attapulgite, high-purity carbon black and carries out ground and mixed, be sieved after grinding；(2) by the mixing after being ground up, sieved
The distilled water stirring of mass ratio 2:1 is added in raw material, the alcohol solvent of mass ratio 1:2-1:3 is added later, and in 45-65 DEG C of water-bath
Then lower stirring 2.5-4.5h is evaporated at 85-95 DEG C again, be finally transferred to high temperature furnace roasting, silanization carbon black concave convex rod is made
Native powder；(3) by silanization carbon black attapulgite powder, silicon powder, rosin ester, 30s nitrocellulose liquid, methacrylic acid, poly-
Benzene acrylamide, carboxymethyl cellulose and ethyl alcohol mixing are put into spheroidal graphite 2-3h in wet ball mill, take out and magnesium alloy manufacture is made
Coating.
Further, in parts by mass, raw material specific gravity are as follows: 30-50 mass parts silanization carbon black attapulgite powder, 10-
15 mass parts silicon powders, 20-25 mass parts rosin ester, 10-15 mass parts 30s nitrocellulose liquid, 3-5 mass parts metering system
Acid, 3-5 mass parts polyphenyl acrylamide, 3-8 mass parts carboxymethyl cellulose, 1-3 mass parts ethyl alcohol.
Further, obtained casting magnesium aluminum alloy coating is uniformly brushed on chill surface with hairbrush or felt, is applied
Layer is with a thickness of 0.4-0.5mm.
Further, when coating is not dry, dry sand is uniformly sprinkled, is adhered to dry sand on chill.
The beneficial effects of the present invention are: coating of the invention has preferable viscosity, good high-temperature resistant property and high temperature
Intensity is especially added to after the attapulgite of silanization treatment, further improves the performance of coating.
Specific embodiment
A specific embodiment of the invention is described in detail below:
Embodiment:
The present invention provides a kind of preparation method of casting magnesium aluminum alloy coating, and preparation step is as follows: (1) by attapulgite,
High-purity carbon black is added ball mill and carries out ground and mixed, is sieved after grinding；(2) mass ratio is added in the mixed raw material after being ground up, sieved
The distilled water of 2:1 stirs, and the alcohol solvent of mass ratio 1:2-1:3 is added later, and stirs 2.5- under 45-65 DEG C of water-bath
Then 4.5h is evaporated at 85-95 DEG C again, be finally transferred to high temperature furnace roasting, silanization carbon black attapulgite powder is made；(3)
Will in parts by mass, raw material specific gravity are as follows: 30-50 mass parts silanization carbon black attapulgite powder, 10-15 mass parts silicon powder, 20-
25 mass parts rosin esters, 10-15 mass parts 30s nitrocellulose liquid, 3-5 mass parts methacrylic acid, 3-5 mass parts polyphenyl alkene
Amide, 3-8 mass parts carboxymethyl cellulose, 1-3 mass parts ethyl alcohol.Mixing is put into spheroidal graphite 2-3h in wet ball mill, takes out system
It obtains magnesium alloy and manufactures coating；Obtained casting magnesium aluminum alloy coating is uniformly brushed on chill surface with hairbrush or felt,
Coating layer thickness is 0.4-0.5mm；When coating is not dry, dry sand is uniformly sprinkled, is adhered to dry sand on chill；Painting of the invention
Material has preferable viscosity, good high-temperature resistant property and elevated temperature strength, is especially added to the bumps by silanization treatment
After stick soil, the performance of coating is further improved.
The present invention is not limited to examples detailed above, in claims of the present invention limited range, art technology
The various deformations or amendments that personnel can make without creative work are protected by this patent.
Claims (4)
1. a kind of preparation method of casting magnesium aluminum alloy coating, it is characterised in that preparation step is as follows: (1) by attapulgite, height
Pure carbon black is added ball mill and carries out ground and mixed, is sieved after grinding；(2) mass ratio 2 is added in the mixed raw material after being ground up, sieved:
1 distilled water stirring, is added the alcohol solvent of mass ratio 1:2-1:3, and stir 2.5-4.5h under 45-65 DEG C of water-bath later,
Then it is evaporated at 85-95 DEG C again, is finally transferred to high temperature furnace roasting, silanization carbon black attapulgite powder is made；(3) by silane
It is fine to change carbon black attapulgite powder, silicon powder, rosin ester, 30s nitrocellulose liquid, methacrylic acid, polyphenyl acrylamide, carboxymethyl
Dimension element and ethyl alcohol mixing are put into spheroidal graphite 2-3h in wet ball mill, and taking-up is made magnesium alloy and manufactures coating.
2. a kind of preparation method of casting magnesium aluminum alloy coating according to claim 1, which is characterized in that press mass parts
Meter, raw material specific gravity are as follows: 30-50 mass parts silanization carbon black attapulgite powder, 10-15 mass parts silicon powder, 20-25 mass parts pine
Fragrant ester, 10-15 mass parts 30s nitrocellulose liquid, 3-5 mass parts methacrylic acid, 3-5 mass parts polyphenyl acrylamide, 3-8 matter
Measure part carboxymethyl cellulose, 1-3 mass parts ethyl alcohol.
3. a kind of preparation method of casting magnesium aluminum alloy coating according to claim 1, which is characterized in that use hairbrush or hair
Felt uniformly brushes obtained casting magnesium aluminum alloy coating in chill surface, coating layer thickness 0.4-0.5mm.
4. a kind of preparation method of casting magnesium aluminum alloy coating according to claim 3, which is characterized in that not dry in coating
When, dry sand is uniformly sprinkled, is adhered to dry sand on chill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194716.XA CN109836861A (en) | 2017-11-24 | 2017-11-24 | A kind of preparation method of casting magnesium aluminum alloy coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194716.XA CN109836861A (en) | 2017-11-24 | 2017-11-24 | A kind of preparation method of casting magnesium aluminum alloy coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109836861A true CN109836861A (en) | 2019-06-04 |
Family
ID=66877432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711194716.XA Withdrawn CN109836861A (en) | 2017-11-24 | 2017-11-24 | A kind of preparation method of casting magnesium aluminum alloy coating |
Country Status (1)
| Country | Link |
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| CN (1) | CN109836861A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733997A (en) * | 2022-06-13 | 2022-07-12 | 中国航发北京航空材料研究院 | Coating for precision sand mold casting core and preparation method thereof |
-
2017
- 2017-11-24 CN CN201711194716.XA patent/CN109836861A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733997A (en) * | 2022-06-13 | 2022-07-12 | 中国航发北京航空材料研究院 | Coating for precision sand mold casting core and preparation method thereof |
| CN114733997B (en) * | 2022-06-13 | 2022-08-30 | 中国航发北京航空材料研究院 | Coating for precision sand mold casting core and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190604 |
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| WW01 | Invention patent application withdrawn after publication |