CN107119213A - A kind of aluminium alloy extrusions and its preparation technology - Google Patents
A kind of aluminium alloy extrusions and its preparation technology Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
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- C08K3/00—Use of inorganic substances as compounding ingredients
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
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Abstract
The invention provides a kind of aluminium alloy extrusions and its preparation technology; aluminium alloy extrusions includes aluminum alloy base material, protective layer, colored paint coating and varnish coat; the aluminum alloy base material surface applies matcoveredn, and the protective layer applies coloured enamel coating, and the colored paint coating surface scribbles varnish coat；Characterized in that, the aluminum alloy base material includes following raw material：10 15 parts of chromium, 10 15 parts of nickel, 5 10 parts of silicon, 0.5 1 parts of iron, 12 parts of manganese, 12 parts of magnesium, 12 parts of zinc, 0.5 1 parts of titanium, 0.1 0.3 parts of lead, 0.01 0.03 parts of cadmium, remaining is aluminium.Good mechanical performance of the present invention；Surface has scratch resistant, wear-resisting, corrosion-resistant and the features such as be hardly damaged, and can meet the high demand that aluminum alloy doorframe increasingly increases on automobile.
Description
Technical field
The present invention relates to aluminium alloy extrusions technical field, and in particular to a kind of aluminium alloy extrusions and its preparation technology.
Background technology
Chinese Automobile Industry ' passes through the construction of decades, has begun to take shape, auto output is substantially increased, particularly with the addition of generation
After trade tissue, not only Chinese Automobile Industry ' can not be annihilated as worrying many people, produced on the contrary by international automobile
The capital and technology of industry, realize one and jump greatly, and China would is that the biggest in the world, fastest-rising vapour for 5~10 years in future
Car market, this has obtained the generally approval of international professional.At present, many international automobile large manufacturers have arrived at China and joint built
Factory, and constantly to Chinese additional investment, it is demonstrated by strong investment willingness, such as Volkswagen, french citroen vapour
Che companies etc. are invested to China's increase, and Domestic economical car is provided to Chinese market, and raising occupies in Chinese car market
Rate.
Because the intensity of general aluminium alloy is good not as good as the intensity of steel, manufacture automobile door and window section bar during, it is necessary to
Continuous annealing is carried out to improve its intensity, but quantity-produced expense and heat treatment energy consumption are all than larger, with aluminium
Application proportion of the alloy profile on automobile door and window constantly rises, therefore the new aluminium alloy extrusions of exploitation is imperative.
The content of the invention
The purpose of the present invention is that there is provided a kind of aluminium alloy extrusions and its preparation technology for problem of the prior art.
In order to achieve the above object, the present invention is achieved through the following technical solutions：
A kind of aluminium alloy extrusions, including aluminum alloy base material, protective layer, colored paint coating and varnish coat, the aluminium alloy base
Material surface applies matcoveredn, and the protective layer applies coloured enamel coating, and the colored paint coating surface scribbles varnish coat；It is special
Levy and be, the aluminum alloy base material includes following raw material：
10-15 parts of chromium, 10-15 parts of nickel, 5-10 parts of silicon, 0.5-1 parts of iron, 1-2 parts of manganese, 1-2 parts of magnesium, 1-2 parts of zinc, titanium 0.5-
1 part, 0.1-0.3 parts of lead, 0.01-0.03 parts of cadmium, remaining is aluminium.
Further, the raw material of following parts by weight is included in the colored paint coating：
35-40 parts of resin, 20-25 parts of monomer, 4-6 parts of light trigger, 25-30 parts of diluent, 0.5-1 parts of levelling agent and color
It is smart 2-3 parts.
Further, the preparation method of the colored paint is：
(1) solution containing light trigger is obtained after mixing light trigger and diluent；
(2) prepared to step (1) in solution of the gained containing light trigger and add monomer, mixed after stirring
Liquid；
(3) under stirring, prepared to step (2) in gained mixed liquor and add resin, and stirred, then added
Levelling agent and color essence, after being stirred until homogeneous, obtain colored paint of the present invention.
Further, the raw material of following parts by weight is included in the varnish coat：
50-70 parts of water-base resin, 0.1-2.0 parts of aqueous defoamer, 0.5-4.0 parts of water-based thickener, aqueous levelling agent 1-3
Part, 1-8 parts of cosolvent, 0.1-2 parts of aqueous wetting agent and 2-10 parts of deionized water, aqueous 15-25 parts of polyisocyanate ester dispersion
With 2-7 parts of solvent.
Further, the preparation method of the varnish comprises the following steps：
(1) by water-base resin, aqueous defoamer, water-based thickener is sequentially added and is well mixed under stirring；
(2) by aqueous levelling agent, aqueous wetting agent, cosolvent and deionized water are sequentially added in said components, and are stirred
Uniformly, component A is prepared；
(3) by aqueous polyisocyanate resin, solvent and deionized water are added under stirring, and are stirred, system
It is standby go out component B；
(4) component A and component B are well mixed, obtain the varnish.
Further, the protective layer includes 20-50 parts of butadiene rubber, 20-50 parts of filler, 1-2 parts of plasticiser and idol
Join 1-3 parts of agent；
Wherein, the filler is the mixture of manganese dioxide and silica；The lubricant is organic silicone oil, described
Coupling agent is the oleic acid acyloxy titanate esters of isopropyl three, and the plasticiser is the m-methyl benzoic acid ester of diethylene glycol two.
Further, the thickness of the protective layer is 10-20 μm, and the thickness of the varnish coat is 30-50 μm, described
The thickness of colored paint coating is 50-70 μm.
A kind of preparation method of aluminium alloy extrusions, comprises the following steps：
(1) aluminum alloy blank is put into and melting is carried out in smelting furnace, in-furnace temperature is controlled at 790-810 DEG C, uses fining agent
Micronization processes are carried out, in-furnace temperature is adjusted to 740-780 DEG C, refining treatment is carried out using refining agent, skimmed, 0.5-1h is incubated,
It is slowly cooled to room temperature, obtains aluminium alloy bar；Aluminium alloy bar is inserted in heating furnace, with 20-30 DEG C/min speed liter
Temperature is incubated 5-6h, is progressively cooled to room temperature, continuously repeats abovementioned steps, finally take out air cooling to 430-450 DEG C；
(2) by after the aluminium alloy bar obtained by step (1) processing removes surface and oil contaminant, the defect that machinery is damaged, put
Enter and extrusion forming is carried out in the mould of single lead screw ex truding briquetting machine, extrusion speed is 2.0-2.6m/min, obtains the aluminum alloy base material；
(3) aluminium alloy extrusions obtained in step (2) is used and sprayed water and immersion Cooling Quenching, be quickly cooled to product
180-200 DEG C, it is incubated 7-8h；
(4) to the aluminium alloy extrusions by step (3) processing using electrostatic spray successively spraying protective layer, colored paint coating
And varnish coat, the aluminium alloy extrusions is made.After the completion of each coating spraying, it is both needed to aluminium alloy extrusions being transferred to 170-200
In the baking oven of DEG C temperature, 20-30min is toasted.
The present invention compared with prior art, with following beneficial effect：
Aluminum alloy base material of the present invention is using compositions such as aluminium, nickel, chromium, silicon, and intensity is high, good mechanical performance；Surface passes through suitable
The functional coating that buna, filler, plasticiser and coupling agent are made is protected, with scratch resistant, wear-resisting, corrosion-resistant and be difficult
The features such as damage, the high demand that aluminum alloy doorframe increasingly increases on automobile can be met.In the surface spraying of aluminum alloy base material
Protective layer, have a preferable wearability, protection automobile door frame is difficult to be scratched, and the colored paint coating of use has outstanding levelling
Property, and also with richness is high, hardness is good, color and luster is high, resistance to scraping good, endurance is good and high (reachable to HIPS adhesive force
100% attachment) etc. fine quality；The varnish used is environment-friendly type paint, to workman's body almost fanout free region, can be used directly from
Sub- water reduces VOC discharge, with the colored paint coordinative construction in the present invention, is conducive to better controling over painting thickness as diluent
Degree and structural homogenity, while protection automobile door frame surface is not damaged by, beautify the outward appearance of doorframe, improve the use longevity of doorframe
Life.
Continuous production can be realized using the preparation technology of the present invention, and the aluminium alloy extrusions of big cross section can be obtained, it is raw
Production efficiency is significantly improved, and production cost is substantially reduced.
Embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
A kind of aluminium alloy extrusions, including aluminum alloy base material, protective layer, colored paint coating and varnish coat, the aluminium alloy base
Material surface applies matcoveredn, and the protective layer applies coloured enamel coating, and the colored paint coating surface scribbles varnish coat；It is special
Levy and be, the aluminum alloy base material includes following raw material：
10 parts of chromium, 10 parts of nickel, 5 parts of silicon, 0.5 part of iron, 1 part of manganese, 1 part of magnesium, 1 part of zinc, 0.5 part of titanium, 0.1 part of lead, cadmium 0.01
Part, remaining is aluminium.
The following raw material is included in the colored paint coating：
2 parts of 35 parts of resin, 20 parts of monomer, 4 parts of light trigger, 25 parts of diluent, 0.5 part of levelling agent and color essence.
The preparation method of the colored paint is：
(1) solution containing light trigger is obtained after mixing light trigger and diluent；
(2) prepared to step (1) in solution of the gained containing light trigger and add monomer, mixed after stirring
Liquid；
(3) under stirring, prepared to step (2) in gained mixed liquor and add resin, and stirred, then added
Levelling agent and color essence, after being stirred until homogeneous, obtain colored paint of the present invention.
The following raw material is included in the varnish coat：
50 parts of water-base resin, 0.1 part of aqueous defoamer, 0.5 part of water-based thickener, 1 part of aqueous levelling agent, 1 part of cosolvent,
2 parts of 2 parts of 0.1 part of aqueous wetting agent and deionized water, 15 parts of aqueous polyisocyanate ester dispersion and solvent.
The preparation method of the varnish comprises the following steps：
(1) by water-base resin, aqueous defoamer, water-based thickener is sequentially added and is well mixed under stirring；
(2) by aqueous levelling agent, aqueous wetting agent, cosolvent and deionized water are sequentially added in said components, and are stirred
Uniformly, component A is prepared；
(3) by aqueous polyisocyanate resin, solvent and deionized water are added under stirring, and are stirred, system
It is standby go out component B；
(4) component A and component B are well mixed, obtain the varnish.
The protective layer includes 1 part of 20 parts of butadiene rubber, 20 parts of filler, 1 part of plasticiser and coupling agent；
Wherein, the filler is the mixture of manganese dioxide and silica；The lubricant is organic silicone oil, described
Coupling agent is the oleic acid acyloxy titanate esters of isopropyl three, and the plasticiser is the m-methyl benzoic acid ester of diethylene glycol two.
The thickness of the protective layer is 10 μm, and the thickness of the varnish coat is 30 μm, the thickness of described colored paint coating
For 50 μm.
A kind of preparation method of aluminium alloy extrusions, comprises the following steps：
(1) aluminum alloy blank is put into and melting is carried out in smelting furnace, in-furnace temperature is controlled at 790 DEG C, carried out with fining agent
Micronization processes, 740 DEG C are adjusted to by in-furnace temperature, are carried out refining treatment using refining agent, are skimmed, and are incubated 0.5h, are slowly cooled to
Room temperature, obtains aluminium alloy bar；Aluminium alloy bar is inserted in heating furnace, 430 DEG C, insulation are warming up to 20 DEG C/min speed
5h, is progressively cooled to room temperature, continuously repeats abovementioned steps, finally takes out air cooling；
(2) by after the aluminium alloy bar obtained by step (1) processing removes surface and oil contaminant, the defect that machinery is damaged, put
Enter and extrusion forming is carried out in the mould of single lead screw ex truding briquetting machine, extrusion speed is 2.0m/min, obtains the aluminum alloy base material；
(3) aluminium alloy extrusions obtained in step (2) is used and sprayed water and immersion Cooling Quenching, be quickly cooled to product
180 DEG C, it is incubated 7h；
(4) to the aluminium alloy extrusions by step (3) processing using electrostatic spray successively spraying protective layer, colored paint coating
And varnish coat, the aluminium alloy extrusions is made.After the completion of each coating spraying, it is both needed to aluminium alloy extrusions being transferred to 170 DEG C of temperature
In the baking oven of degree, 20min is toasted.
Embodiment 2
A kind of aluminium alloy extrusions, including aluminum alloy base material, protective layer, colored paint coating and varnish coat, the aluminium alloy base
Material surface applies matcoveredn, and the protective layer applies coloured enamel coating, and the colored paint coating surface scribbles varnish coat；It is special
Levy and be, the aluminum alloy base material includes following raw material：
15 parts of chromium, 15 parts of nickel, 10 parts of silicon, 1 part of iron, 2 parts of manganese, 2 parts of magnesium, 2 parts of zinc, 1 part of titanium, 0.3 part of lead, 0.03 part of cadmium,
Remaining is aluminium.
The following raw material is included in the colored paint coating：
3 parts of 40 parts of resin, 25 parts of monomer, 6 parts of light trigger, 30 parts of diluent, 1 part of levelling agent and color essence.
The preparation method of the colored paint is：
(1) solution containing light trigger is obtained after mixing light trigger and diluent；
(2) prepared to step (1) in solution of the gained containing light trigger and add monomer, mixed after stirring
Liquid；
(3) under stirring, prepared to step (2) in gained mixed liquor and add resin, and stirred, then added
Levelling agent and color essence, after being stirred until homogeneous, obtain colored paint of the present invention.
The following raw material is included in the varnish coat：
70 parts of water-base resin, 2.0 parts of aqueous defoamer, 4.0 parts of water-based thickener, 3 parts of aqueous levelling agent, 8 parts of cosolvent,
7 parts of 10 parts of 2 parts of aqueous wetting agent and deionized water, 25 parts of aqueous polyisocyanate ester dispersion and solvent.
The preparation method of the varnish comprises the following steps：
(1) by water-base resin, aqueous defoamer, water-based thickener is sequentially added and is well mixed under stirring；
(2) by aqueous levelling agent, aqueous wetting agent, cosolvent and deionized water are sequentially added in said components, and are stirred
Uniformly, component A is prepared；
(3) by aqueous polyisocyanate resin, solvent and deionized water are added under stirring, and are stirred, system
It is standby go out component B；
(4) component A and component B are well mixed, obtain the varnish.
The protective layer includes 3 parts of 50 parts of butadiene rubber, 50 parts of filler, 2 parts of plasticiser and coupling agent；
Wherein, the filler is the mixture of manganese dioxide and silica；The lubricant is organic silicone oil, described
Coupling agent is the oleic acid acyloxy titanate esters of isopropyl three, and the plasticiser is the m-methyl benzoic acid ester of diethylene glycol two.
The thickness of the protective layer is 20 μm, and the thickness of the varnish coat is 50 μm, the thickness of described colored paint coating
For 70 μm.
A kind of preparation method of aluminium alloy extrusions, comprises the following steps：
(1) aluminum alloy blank is put into and melting is carried out in smelting furnace, in-furnace temperature is controlled at 810 DEG C, carried out with fining agent
Micronization processes, 780 DEG C are adjusted to by in-furnace temperature, are carried out refining treatment using refining agent, are skimmed, and are incubated 1h, are slowly cooled to room
Temperature, obtains aluminium alloy bar；Aluminium alloy bar is inserted in heating furnace, 450 DEG C, insulation are warming up to 30 DEG C/min speed
6h, is progressively cooled to room temperature, continuously repeats abovementioned steps, finally takes out air cooling；
(2) by after the aluminium alloy bar obtained by step (1) processing removes surface and oil contaminant, the defect that machinery is damaged, put
Enter and extrusion forming is carried out in the mould of single lead screw ex truding briquetting machine, extrusion speed is 2.6m/min, obtains the aluminum alloy base material；
(3) aluminium alloy extrusions obtained in step (2) is used and sprayed water and immersion Cooling Quenching, be quickly cooled to product
200 DEG C, it is incubated 8h；
(4) to the aluminium alloy extrusions by step (3) processing using electrostatic spray successively spraying protective layer, colored paint coating
And varnish coat, the aluminium alloy extrusions is made.After the completion of each coating spraying, it is both needed to aluminium alloy extrusions being transferred to 200 DEG C of temperature
In the baking oven of degree, 30min is toasted.
Embodiment 3
A kind of aluminium alloy extrusions, including aluminum alloy base material, protective layer, colored paint coating and varnish coat, the aluminium alloy base
Material surface applies matcoveredn, and the protective layer applies coloured enamel coating, and the colored paint coating surface scribbles varnish coat；It is special
Levy and be, the aluminum alloy base material includes following raw material：
13 parts of chromium, 13 parts of nickel, 8 parts of silicon, 0.8 part of iron, 1.5 parts of manganese, 1.5 parts of magnesium, 1.5 parts of zinc, 0.8 part of titanium, 0.2 part of lead,
0.02 part of cadmium, remaining is aluminium.
The following raw material is included in the colored paint coating：
2.5 parts of 38 parts of resin, 23 parts of monomer, 5 parts of light trigger, 28 parts of diluent, 0.8 part of levelling agent and color essence.
The preparation method of the colored paint is：
(1) solution containing light trigger is obtained after mixing light trigger and diluent；
(2) prepared to step (1) in solution of the gained containing light trigger and add monomer, mixed after stirring
Liquid；
(3) under stirring, prepared to step (2) in gained mixed liquor and add resin, and stirred, then added
Levelling agent and color essence, after being stirred until homogeneous, obtain colored paint of the present invention.
The following raw material is included in the varnish coat：
60 parts of water-base resin, 1 part of aqueous defoamer, 2.3 parts of water-based thickener, 2 parts of aqueous levelling agent, 4 parts of cosolvent, water
Property 3 parts of 1 part of wetting agent and 6 parts of deionized water, 20 parts of aqueous polyisocyanate ester dispersion and solvent.
The preparation method of the varnish comprises the following steps：
(1) by water-base resin, aqueous defoamer, water-based thickener is sequentially added and is well mixed under stirring；
(2) by aqueous levelling agent, aqueous wetting agent, cosolvent and deionized water are sequentially added in said components, and are stirred
Uniformly, component A is prepared；
(3) by aqueous polyisocyanate resin, solvent and deionized water are added under stirring, and are stirred, system
It is standby go out component B；
(4) component A and component B are well mixed, obtain the varnish.
The protective layer includes 2 parts of 35 parts of butadiene rubber, 35 parts of filler, 1 part of plasticiser and coupling agent；
Wherein, the filler is the mixture of manganese dioxide and silica；The lubricant is organic silicone oil, described
Coupling agent is the oleic acid acyloxy titanate esters of isopropyl three, and the plasticiser is the m-methyl benzoic acid ester of diethylene glycol two.
The thickness of the protective layer is 15 μm, and the thickness of the varnish coat is 40 μm, the thickness of described colored paint coating
For 60 μm.
A kind of preparation method of aluminium alloy extrusions, comprises the following steps：
(1) aluminum alloy blank is put into and melting is carried out in smelting furnace, in-furnace temperature is controlled at 800 DEG C, carried out with fining agent
Micronization processes, 760 DEG C are adjusted to by in-furnace temperature, are carried out refining treatment using refining agent, are skimmed, and are incubated 0.8h, are slowly cooled to
Room temperature, obtains aluminium alloy bar；Aluminium alloy bar is inserted in heating furnace, 440 DEG C, insulation are warming up to 25 DEG C/min speed
5.5h, is progressively cooled to room temperature, continuously repeats abovementioned steps, finally takes out air cooling；
(2) by after the aluminium alloy bar obtained by step (1) processing removes surface and oil contaminant, the defect that machinery is damaged, put
Enter and extrusion forming is carried out in the mould of single lead screw ex truding briquetting machine, extrusion speed is 2.3m/min, obtains the aluminum alloy base material；
(3) aluminium alloy extrusions obtained in step (2) is used and sprayed water and immersion Cooling Quenching, be quickly cooled to product
190 DEG C, it is incubated 7.5h；
(4) to the aluminium alloy extrusions by step (3) processing using electrostatic spray successively spraying protective layer, colored paint coating
And varnish coat, the aluminium alloy extrusions is made.After the completion of each coating spraying, it is both needed to aluminium alloy extrusions being transferred to 180 DEG C of temperature
In the baking oven of degree, 25min is toasted.
Embodiment 4
Enter row index using embodiment 1-3 and existing aluminium alloy extrusions to test and assess, as a result as shown in table 1：
Table 1
Wherein, corrosion resistance is provided by national standard GB/T6892-2006, and small blister scar, crackle, thin slice or powder occurs in surface
End, is qualified only with phenomenon (EA) level being slightly separated；There is obvious layering in surface, and penetrates the phenomenon (EB- into metal
ED) level is unqualified.
The preferred embodiments of the present invention are these are only, are not intended to limit the invention, although with reference to the foregoing embodiments
The present invention is described in detail, for those skilled in the art, it still can be to foregoing embodiments institute
The technical scheme of record is modified, or carries out equivalent substitution to which part technical characteristic.It is all the present invention spirit and
Within principle, any modification made, equivalent substitution, improve etc., it should be included in the scope of the protection.
Claims (8)
1. a kind of aluminium alloy extrusions, including aluminum alloy base material, protective layer, colored paint coating and varnish coat, the aluminum alloy base material
Surface applies matcoveredn, and the protective layer applies coloured enamel coating, and the colored paint coating surface scribbles varnish coat；Its feature
It is, the aluminum alloy base material includes following raw material：
10-15 parts of chromium, 10-15 parts of nickel, 5-10 parts of silicon, 0.5-1 parts of iron, 1-2 parts of manganese, 1-2 parts of magnesium, 1-2 parts of zinc, 0.5-1 parts of titanium,
0.1-0.3 parts of lead, 0.01-0.03 parts of cadmium, remaining is aluminium.
2. a kind of aluminium alloy extrusions according to claim 1, it is characterised in that following weight is included in the colored paint coating
The raw material of part：
35-40 parts of resin, 20-25 parts of monomer, 4-6 parts of light trigger, 25-30 parts of diluent, 0.5-1 parts of levelling agent and color essence 2-
3 parts.
3. a kind of aluminium alloy extrusions according to claim 2, it is characterised in that the preparation method of the colored paint is：
（1）The solution containing light trigger is obtained after light trigger and diluent are mixed；
（2）To step（1）Prepare in solution of the gained containing light trigger and add monomer, mixed liquor is obtained after stirring；
（3）Under stirring, to step（2）Prepare in gained mixed liquor and add resin, and stir, then add levelling
Agent and color essence, after being stirred until homogeneous, obtain colored paint of the present invention.
4. a kind of aluminium alloy extrusions according to claim 1, it is characterised in that following weight is included in the varnish coat
The raw material of part：
50-70 parts of water-base resin, 0.1-2.0 parts of aqueous defoamer, 0.5-4.0 parts of water-based thickener, 1-3 parts of aqueous levelling agent,
2-10 part of 1-8 parts of cosolvent, 0.1-2 parts of aqueous wetting agent and deionized water, 15-25 parts of aqueous polyisocyanate ester dispersion with it is molten
2-7 parts of agent.
5. a kind of aluminium alloy extrusions according to claim 4, it is characterised in that the preparation method of the varnish includes following
Step：
（1）By water-base resin, aqueous defoamer, water-based thickener is sequentially added and is well mixed under stirring；
（2）By aqueous levelling agent, aqueous wetting agent, cosolvent and deionized water are sequentially added in said components, and are stirred,
Prepare component A；
（3）By aqueous polyisocyanate resin, solvent and deionized water are added under stirring, and are stirred, and are prepared
Component B；
（4）Component A and component B are well mixed, the varnish is obtained.
6. a kind of aluminium alloy extrusions according to claim 1, it is characterised in that the protective layer includes butadiene rubber 20-
50 parts, 20-50 parts of filler, 1-3 parts of 1-2 parts of plasticiser and coupling agent；
Wherein, the filler is the mixture of manganese dioxide and silica；The lubricant is organic silicone oil, the coupling
Agent is the oleic acid acyloxy titanate esters of isopropyl three, and the plasticiser is the m-methyl benzoic acid ester of diethylene glycol two.
7. a kind of aluminium alloy extrusions according to claim 1, it is characterised in that the thickness of the protective layer is 10-20 μm,
The thickness of the varnish coat is 30-50 μm, and the thickness of described colored paint coating is 50-70 μm.
8. the preparation method of a kind of aluminium alloy extrusions as described in claim 1-7 any one, it is characterised in that including following
Step：
（1）Aluminum alloy blank is put into melting is carried out in smelting furnace, in-furnace temperature is controlled at 790-810 DEG C, carried out with fining agent
Micronization processes, 740-780 DEG C is adjusted to by in-furnace temperature, is carried out refining treatment using refining agent, is skimmed, and is incubated 0.5-1h, slowly
Room temperature is cooled to, aluminium alloy bar is obtained；Aluminium alloy bar is inserted in heating furnace, is warming up to 20-30 DEG C/min speed
430-450 DEG C, 5-6h is incubated, room temperature is progressively cooled to, continuously repeats abovementioned steps, finally take out air cooling；
（2）Step will be passed through（1）Aluminium alloy bar obtained by processing is removed after surface and oil contaminant, the defect that machinery is damaged, and is put into crowded
Extrusion forming is carried out in the mould of pressing machine, extrusion speed is 2.0-2.6m/min, obtains the aluminum alloy base material；
（3）To step（2）In obtained aluminium alloy extrusions using spraying water and immersion Cooling Quenching, product is quickly cooled to 180-
200 DEG C, it is incubated 7-8h；
（4）To passing through step（3）The aluminium alloy extrusions of processing is using electrostatic spray successively spraying protective layer, colored paint coating and clear
Lacquer coat, is made after the completion of the aluminium alloy extrusions, each coating spraying, is both needed to aluminium alloy extrusions being transferred to 170-200 DEG C of temperature
In the baking oven of degree, 20-30min is toasted.
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