CN113667948A - Vacuum coating method for surface of aluminum alloy wheel - Google Patents

Vacuum coating method for surface of aluminum alloy wheel Download PDF

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Publication number
CN113667948A
CN113667948A CN202110842374.8A CN202110842374A CN113667948A CN 113667948 A CN113667948 A CN 113667948A CN 202110842374 A CN202110842374 A CN 202110842374A CN 113667948 A CN113667948 A CN 113667948A
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CN
China
Prior art keywords
aluminum alloy
wheel
coating
alloy wheel
polishing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110842374.8A
Other languages
Chinese (zh)
Inventor
王再德
段冰洁
李军甫
秦智伟
赵然
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CITIC Dicastal Co Ltd
Original Assignee
CITIC Dicastal Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CITIC Dicastal Co Ltd filed Critical CITIC Dicastal Co Ltd
Priority to CN202110842374.8A priority Critical patent/CN113667948A/en
Publication of CN113667948A publication Critical patent/CN113667948A/en
Priority to KR1020220057862A priority patent/KR20230017119A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/34—Sputtering
    • C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B05D1/06—Applying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B7/00—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins
    • B60B7/0026—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins characterised by the surface
    • B60B7/0033—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins characterised by the surface the dominant aspect being the surface appearance
    • B60B7/0046—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins characterised by the surface the dominant aspect being the surface appearance the surface being plated or coated
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/03—Powdery paints
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/0015—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterized by the colour of the layer
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/02—Pretreatment of the material to be coated
    • C23C14/021—Cleaning or etching treatments
    • C23C14/022—Cleaning or etching treatments by means of bombardment with energetic particles or radiation
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/02—Pretreatment of the material to be coated
    • C23C14/024—Deposition of sublayers, e.g. to promote adhesion of the coating
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/02—Pretreatment of the material to be coated
    • C23C14/028—Physical treatment to alter the texture of the substrate surface, e.g. grinding, polishing
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/0688—Cermets, e.g. mixtures of metal and one or more of carbides, nitrides, oxides or borides
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
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    • C23C14/083—Oxides of refractory metals or yttrium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14—Metallic material, boron or silicon
    • C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
    • C23C14/165—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon by cathodic sputtering
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    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
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    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
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    • C—CHEMISTRY; METALLURGY
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    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
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    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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    • C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
    • C23C2222/20—Use of solutions containing silanes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
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Abstract

A vacuum coating method for the surface of an aluminum alloy wheel comprises the following steps: the method comprises the following steps of grinding and polishing the surface of the aluminum wheel, cleaning, carrying out surface chemical passivation treatment on the aluminum wheel, carrying out plasma treatment on the surface of the aluminum wheel, carrying out PVD (physical vapor deposition) blue coating and spraying transparent powder. By the method, the polished surface of the aluminum alloy wheel is plated with the blue bright film in vacuum, and the powder transparent coating is sprayed, so that the hub is blue, bright, attractive and elegant in appearance, and excellent in corrosion resistance of the coating, and meets the increasing personalized requirements of people.

Description

Vacuum coating method for surface of aluminum alloy wheel
Technical Field
The invention relates to the technical field of wheels, in particular to a vacuum coating method for the surface of an aluminum alloy wheel.
Background
The aluminum alloy wheel is widely applied to passenger cars, and the requirement of the industry on the surface decoration of the aluminum alloy wheel is increasingly increased.
Vacuum sputtering (PVD) is environment-friendly, water-saving and energy-saving, and has a high technology added value, and most of the existing film coatings are white or black bright films. With the development of social fire, the individual requirements of people are increasing day by day, and the requirements of the individual film coating technology on the surfaces of middle-high-grade wheels are gradually increased. The aluminum alloy wheel polishing (finishing) surface technology can achieve the requirement by spraying the colored transparent paint, but the color fullness and the metal texture are poor, and the requirement is further improved. The environment-friendly coating films of other colors are researched, and the individual requirements of the high-grade and medium-grade automobile industry are met.
The physical vapor deposition surface treatment methods are classified into vapor deposition, plasma multi-arc sputtering, magnetron sputtering, reactive magnetron sputtering, and the like according to the principle.
Disclosure of Invention
In view of the above, the invention aims to provide a vacuum coating method for the surface of an aluminum alloy wheel, which can perform vacuum coating of a blue bright film on the polished surface of the aluminum alloy wheel, and spray coating of a powder transparent coating, so that the wheel is blue, bright, attractive and elegant in appearance, the coating is excellent in corrosion resistance, and the ever-increasing personalized requirements of people are met.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vacuum coating method for the surface of an aluminum alloy wheel comprises the following steps: the method comprises the following steps of grinding and polishing the surface of the aluminum wheel, cleaning, carrying out surface chemical passivation treatment on the aluminum wheel, carrying out plasma treatment on the surface of the aluminum wheel, carrying out PVD (physical vapor deposition) blue coating and spraying transparent powder.
In some embodiments, the aluminum wheel surface finish polishing comprises sanding, fine sanding, rough polishing, and mirror polishing.
In some embodiments, the mirror polishing comprises mechanical polishing and/or finishing polishing.
In some embodiments, the chemical passivation treatment of the surface of the aluminum alloy wheel comprises a silane concentration of 10-30 mg/L and a titanium fluoride concentration of 30-50 mg/L; the hydrofluoric acid is used for adjusting the acid concentration of the solution, and the aqueous solution with the pH value of 3.5-4.0 is used for carrying out chemical passivation treatment on the surface of the aluminum alloy wheel to form Al on the surface2O3.SiO2.TiO2A hybrid passivation film.
In some embodiments, the spray time is 60-100 s; then spraying deionized water, and controlling the conductivity to be less than or equal to 10 mu s/cm; after cleaning, drying with hot air, wherein the drying temperature of the wheel is more than 110 ℃, and the baking time is more than 20 min.
In some embodiments, the aluminum alloy wheel surface plasma treatment comprises omnibearing plasma treatment of the front, side and inner cavity of the wheel by using radio frequency technology and using 99.999% of oxygen as working gas.
In some embodiments, the RF power is set at 1.0-2.0 kw; cleaning time is 20-40s, and vacuum degree of cavity is 5 x 10-2 Pa, and the flow rate of the charged oxygen is 50-150 cc/min.
In some embodiments, the PVD blue coating comprises a coating equipment installation multi-target layout, and the target positions are alternately provided with nickel-chromium alloy targets and niobium oxide targets one by one; by adopting a three-stage coating control method, the vacuum degree of the first stage equipment reaches 5 x 10-3Pa, filling argon with the flow rate of 50-80 cc/min; starting the nickel-chromium-gold target material with the power of 10-15 kw; simultaneously starting the niobium oxide target material with the power of 0.5-1.0 kw; the rotation speed of the wheel is 2s for one circle; the film coating time is 6-20 s; the vacuum degree of the second stage equipment reaches 5 x 10-3Pa, argon flow 60-100 cc/min, and oxygen 10-40 cc/min; starting the nickel-chromium-gold target material with the power of 8-15 kw; simultaneously starting the niobium oxide target material with the power of 8-14 kw; the rotation speed of the wheel is 2s for one circle; the film coating time is 6-20 s; the vacuum degree of the third stage equipment reaches 5 x 10-3Pa, argon flow 60-100 cc/min, and oxygen 10-40 cc/min; starting the nickel-chromium-gold target material with the power of 0.5-1.0 kw; simultaneously starting the niobium oxide target material with the power of 8-14 kw; the rotation speed of the wheel is 2s for one circle; the coating time is 40-80 s.
In some embodiments, the purity of the material of the nichrome and niobium oxide target is not less than 99.95%, and the purity of the argon is not less than 99.999%; the purity of oxygen is not less than 99.999%.
In some embodiments, the spray transparent powder comprises an acrylic resin.
The vacuum coating method for the surface of the aluminum alloy wheel has the following advantages:
the method for vacuum coating the surface of the aluminum alloy wheel has the advantages that: (1) the appearance of the blue decorative coating film on the aluminum alloy polished surface is realized; (2) the process improves the binding force between the coating film and the surface of the aluminum alloy; (3) the process improves the ductility of the coating layer and solves the problem of coating cracking; (4) the process solves the corrosion resistance problem of the blue bright coating on the surface of the aluminum alloy; (5) the process solves the problems of adhesion and durability between the coating film and the sprayed transparent powder; (6) the process solves the problems of adhesive force and durability between the coating film and the matte spraying transparent powder; (7) the blue coating film replaces other coating film modes with the same color, and is green and environment-friendly. The technical scheme of the invention can also be applied to other aluminum alloy surface treatment purposes, such as electronic product shells, automobile interior and exterior trimming parts and the like.
The method can form the high-brightness blue coating on the polished surface of the aluminum alloy wheel, and the coating has the advantages of better corrosion resistance, low cost, less energy consumption and green and environment-friendly process. The powder coating is further transparently sprayed on the coating film, so that the process is environment-friendly, the process flow is simplified, and the production efficiency is high. The formed coating and the organic coating meet the requirements of a protective film, and have beautiful appearance and excellent performance. The method conforms to the high-end and green development idea of the manufacturing industry and is the direction of the development of the diversified technology of the wheel coating in the future.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The vacuum coating method for the surface of the aluminum alloy wheel comprises the following steps: polishing the surface of the aluminum alloy wheel, cleaning the aluminum alloy wheel, forming a chemical transition conversion film on the surface of the aluminum alloy wheel, performing surface plasma activation, performing magnetic control variable alloy coating and chemical reaction coating, and spraying a transparent protective layer; wherein the key research is that the surface of the aluminum alloy wheel forms a chemical transition conversion film, the surface is activated by plasma, and the magnetic control variable alloy coating and the chemical reaction blue coating are carried out.
In the method, the surface of the aluminum alloy wheel is polished by adopting a mechanical wheel arrangement polishing method or a wet type finishing technology to obtain a smooth and bright surface.
The aluminum alloy wheel can be cleaned by an ultrasonic cleaning method, the whole wheel is soaked in a weak base cleaning agent and heated to a certain temperature for ultrasonic cleaning. Or spraying weak base cleaning agent to clean surface stains, oil stains, polishing solution and the like; then, pure water cleaning is carried out, and the surface is free of any pollutant and can not lose light.
In the method, a transition conversion film is formed on the surface of the aluminum alloy wheel, and the aluminum alloy wheel with clean surface after being cleaned is immersed in silane and titanium fluoride solution to form Al on the surface2O3.SiO2.TiO2A hybrid passivation film; the passivation film has good binding force with an aluminum alloy matrix, and can improve corrosion resistance and binding force with a coating film.
The surface plasma activation in the method is that the radio frequency plasma technology is adopted, the surface is subjected to vacuum plasma treatment before the wheel is coated with a film, and gas molecules on the surface of several days are removed; the gas used in the plasma treatment process was oxygen at a concentration of 99.999%; after treatment, the bonding force between the PVD coating and the substrate is improved.
The magnetron variable alloy coating and the chemical reaction blue coating in the method are carried out in high vacuum magnetron sputtering equipment, the equipment has a plurality of target positions, and multi-period and multi-target mixed coating is carried out. Injecting different gases or a plurality of gases at different stages in multiple periods to carry out ionization coating; the wheel rotates in the coating cavity, 360-degree dead-angle-free omnibearing coating can be met, and the coating thickness on the surface of the wheel is uniform. The target material used in the blue coating method comprises nickel-chromium alloy (nickel content is 85-60%) and niobium oxide (purity is 99.95%); the prepared gas for coating contains oxygen (99.999%) and argon (99.999%); the total thickness of the coating can be controlled at 100-800 nm.
In the method, the transparent protective film is sprayed by adopting an electrostatic spraying mode, and the adopted transparent coating material is mainly an acrylic resin system; electrostatic spraying is adopted, baking and curing are carried out after spraying, and the thickness of the coating is controlled to be 60-200 mu m.
A method for vacuum Plating (PVD) of a blue bright film on the surface of an aluminum alloy wheel comprises the following process flows: the method comprises the following steps of grinding and polishing the surface of the aluminum alloy wheel, cleaning, chemically passivating the surface of the aluminum alloy wheel, carrying out plasma treatment on the surface of the aluminum alloy wheel, carrying out PVD (physical vapor deposition) blue coating, and spraying transparent powder.
(1) In the grinding and polishing process of the surface of the aluminum wheel, the aluminum alloy material is 356.2 aluminum alloy material, and the surface of the wheel is ground and sanded by 80# abrasive paper to reduce the surface roughness; fine grinding is carried out by 400# sand paper, and the surface roughness is further reduced; then, carrying out rough polishing by using 800# abrasive paper, and finally carrying out polishing or wet finishing polishing by using a mechanical polishing method so that the surface of the aluminum alloy wheel reaches the mirror surface brightness degree.
(2) The aluminum alloy wheel is cleaned by adopting a spray cleaning method, the bath solution uses a weak-base non-phosphorus degreasing agent, the cleaning temperature is 50 +/-5 ℃, and the cleaning time is 2-3 min; washing with tap water after washing, and cleaning the surface degreasing agent by adopting spraying equipment at the temperature of 40 +/-5 ℃; then pickling and surface conditioning, adopting nitric acid with lower concentration, performing spray rinsing at normal temperature for 0.5-1min, and improving the brightness and activity of the surface; then, pure water cleaning is carried out, residues on the surface are cleaned, and the conductivity of surface dripping water is lower than 10 mu s/cm after the wheels are cleaned;
(3) the transition conversion film formed on the surface of the aluminum alloy wheel is treated by a chemical method in a spraying mode, and the main components of the used tank liquor are silane, titanium fluoride and hydrofluoric acid aqueous solution. The concentration of silane in the solution is 10-30 mg/L, and the concentration of titanium fluoride is 30-50 mg/L; adjusting the acid concentration of the solution with hydrofluoric acid, wherein the pH value is 3.5-4.0; the spraying time is 60-100 s; then spraying deionized water, and controlling the conductivity to be less than or equal to 10 mu s/cm; after cleaning, drying with hot air, wherein the drying temperature of the wheel is more than 110 ℃, and the baking time is more than 20 min;
(4) the surface plasma activation in the method is to adopt a radio frequency technology to carry out vacuum plasma treatment, and the working gas of the plasma treatment is oxygen with the concentration of 99.999 percent; the cleaning power is set to be 1.0-2.0 kw; the cleaning time is 20-40 s; the front, the side and the inner cavity of the wheel are subjected to all-dimensional plasma treatment, and the vacuum degree of a cleaning cavity is 5 x 10-2Pa, the flow of the charged oxygen is 50-150 cc/min; the wheels rotate in the cavity to ensure uniform surface treatment of the wheels;
(5) the film coating in the method is that the aluminum alloy wheel is transferred into a film coating cabin body in a vacuum environment after being subjected to plasma surface treatment. The coating equipment is provided with a multi-target layout, and the target positions are alternately provided with nickel-chromium alloy targets and niobium oxide targets one by one; by adopting a three-stage coating control method, the vacuum degree of the first stage equipment reaches 5 x 10-3Pa, filling argon with the flow rate of 50-80 cc/min; starting the nickel-chromium-gold target material with the power of 10-15 kw; simultaneously starting the niobium oxide target material with the power of 0.5-1.0 kw; the rotation speed of the wheel is 2s for one circle; the film coating time is 6-20 s; the vacuum degree of the second stage equipment reaches 5 x 10-3Pa, argon flow 60-100 cc/min, and oxygen 10-40 cc/min; starting the nickel-chromium-gold target material with the power of 8-15 kw; simultaneously starting the niobium oxide target material with the power of 8-14 kw; the rotation speed of the wheel is 2s for one circle; the film coating time is 6-20 s; the vacuum degree of the third stage equipment reaches 5 x 10-3Pa, argon flow 60-100 cc/min, and oxygen 10-40 cc/min; starting the nickel-chromium-gold target material with the power of 0.5-1.0 kw; simultaneously starting the niobium oxide target material with the power of 8-14 kw; the rotation speed of the wheel is 2s for one circle; coating time is 40-80 s; the film plating sputtering process deposits metal atoms, ions, compounds or small particles on the surface to form a nanocrystalline metal plating layer; the blue metal-nonmetal composite coating film is formed, and the coating performance is excellent.
The method has the advantages that the thickness of the plated film on the surface is uniform, the color of the front side of the wheel is consistent, the plated film and the surface of the aluminum alloy have good binding force and excellent corrosion resistance, a nickel-chromium alloy plated film-nickel-chromium alloy-niobium oxide-nickel oxide-chromium oxide composite film is formed in the whole process, the concentration of reaction gas is adjusted according to the air inflow of oxygen in the blue bright color of the appearance, the plating power and time of the niobium oxide achieve the purpose of adjusting the appearance of the deposited plated film, and meanwhile, the element components and the plating performance are adjusted.
The purity of the materials of the nickel-chromium alloy and niobium oxide target materials used in the method is not lower than 99.95 percent, and the purity of the argon used is not lower than 99.999 percent; the purity of oxygen is not less than 99.999%.
(6) The transparent powder spraying in the process flow means that the transparent powder is sprayed on the surface of the wheel after the film is coated, and a high-transparency organic coating is formed after baking and curing. The transparent powder is acrylic resin, the thickness of the sprayed transparent coating is 80-150 mu m, the curing temperature of the surface of the wheel is 177 ℃, the curing time is 20min, and the hardness of the coating after curing is H-level; the coating has excellent aging resistance, does not change color after long-term use, has good adhesion and good bonding force with a coating, effectively protects the coating from being damaged in the use process, and prolongs the service life of the coating. And a matt transparent paint can be sprayed to form matt blue.
Example one:
the method for vacuum coating the surface of the aluminum alloy wheel comprises the following process flows: grinding and polishing the surface of an aluminum wheel, cleaning, chemically passivating the surface of the aluminum wheel, performing plasma treatment on the surface of an aluminum wheel hub, performing PVD (physical vapor deposition) blue coating, and spraying transparent powder;
(1) the surface of the aluminum wheel is polished, and the surface of the hub is polished by using No. 80 abrasive paper to remove sand, so that the surface roughness is reduced; fine grinding is carried out by 400# sand paper, and the surface roughness is further reduced; then, carrying out rough polishing by using 800# abrasive paper, and finally carrying out polishing or wet finishing polishing by using a mechanical polishing method so that the surface of the aluminum alloy wheel reaches the mirror surface brightness degree.
(2) Cleaning the aluminum alloy wheel hub by adopting a spray cleaning method, and using a weak-base non-phosphorus degreasing agent, wherein the cleaning temperature is 50 ℃, and the cleaning time is 2 min; washing with tap water after washing, and cleaning the surface degreasing agent by adopting spraying equipment at the temperature of 40 ℃; then pickling and surface conditioning, adopting nitric acid with lower concentration, performing spray rinsing at normal temperature for 40s, and improving the brightness and activity of the surface; then, pure water cleaning is carried out, and the conductivity of the surface dripping water is 6.5 mu s/cm after the wheel is cleaned;
(3) the surface of the aluminum alloy hub is treated in a spraying mode, and the main components of the used bath solution are silane, titanium fluoride and hydrofluoric acid aqueous solution. The concentration of silane in the solution is 15 mg/L, and the concentration of titanium fluoride is 30 mg/L; adjusting the acid concentration of the solution with hydrofluoric acid, wherein the pH value is 3.5; spraying time is 60 s; then spraying deionized water, wherein the conductivity is 8 mu s/cm; after cleaning, drying by hot air, wherein the drying temperature of the wheel hub is 110 ℃ and the time is 20 min;
(4) vacuum plasma treatment, wherein the working gas is treated by oxygen with the concentration of 99.999 percent; setting the cleaning power to be 1.0 kw; the cleaning time is 20 s; vacuum degree of cleaning cavity 5 x 10-2Pa, charging oxygen flow of 50 cc/min; the hub rotates in the cavity, the front surface, the side surface and the inner cavity of the hub are subjected to all-dimensional plasma treatment, and the surface of the wheel is uniformly treated;
(5) after the surface treatment of the aluminum alloy hub by plasma, the aluminum alloy hub is transferred into a coating cabin body in a vacuum environment. Alternately mounting a nickel-chromium alloy target and a niobium oxide target in the coating; three-stage coating control method, the vacuum degree of the first stage equipment reaches 5 x 10-3Pa, filling argon, wherein the flow of the argon is 50 cc/min; starting the nickel-chromium-gold target material with the power of 10 kw; simultaneously starting the niobium oxide target material with the power of 0.5 kw; the rotation speed of the wheel is 2s for one circle; coating time is 6 s; the vacuum degree of the second stage equipment reaches 5 x 10-3Pa, argon flow 60 cc/min, and oxygen 15 cc/min; starting the nickel-chromium-gold target material with the power of 8-15 kw; simultaneously starting the niobium oxide target material with the power of 8-14 kw; the rotation speed of the wheel is 2s for one circle; coating time is 6 s; the vacuum degree of the third stage equipment reaches 5 x 10-3Pa, argon flow 60 cc/min, and oxygen 15 cc/min; starting the nickel-chromium-gold target material with the power of 0.5 kw; simultaneously starting the niobium oxide target material with the power of 12 kw; the rotation speed of the wheel is 2s for one circle; coating time is 40 s;
the purity of the used nickel-chromium alloy and niobium oxide target materials is not less than 99.95 percent, and the purity of the used argon is not less than 99.999 percent; the purity of oxygen is not lower than 99.999%;
and spraying transparent powder on the surface of the wheel hub after the film is coated, and baking and curing to form a high-transparency organic coating. The thickness of the acrylic resin spraying transparent coating is 80 mu m, the surface curing temperature of the hub is 177 ℃, the time is 20min, and the hardness of the coating after curing is H grade;
example two:
(1) in the aluminum wheel surface grinding and polishing process, the aluminum alloy material is 356.2 aluminum alloy material, and the surface of the wheel hub is ground and sanded by using No. 80 abrasive paper to reduce the surface roughness; then, carrying out fine grinding by using No. 400 sand paper; then, carrying out rough polishing by using 800# abrasive paper, and finally carrying out polishing or wet finishing polishing by using a mechanical polishing method so that the surface of the aluminum alloy wheel reaches the mirror surface brightness degree.
(2) A spray cleaning method is adopted, weak-base non-phosphorus degreasing agent is used for tank liquor, the cleaning temperature is 55 ℃, and the cleaning time is 3 min; then flushing with tap water, and controlling the temperature of water at 45 ℃; pickling, surface conditioning, and spraying and washing at normal temperature for 1 min; then, pure water cleaning is carried out, and after the wheel is cleaned, the electric conductivity of surface dripping water is 5 mu s/cm;
(3) the surface of the aluminum alloy wheel hub is treated by a chemical method in a spraying mode, and the used bath solution mainly comprises silane, titanium fluoride and hydrofluoric acid aqueous solution. The concentration of silane in the solution is 20 mg/L, and the concentration of titanium fluoride is 40 mg/L; adjusting the acid concentration of the solution with hydrofluoric acid, wherein the pH value is 3.8; spraying time is 80 s; spraying deionized water, and controlling the conductivity to be 6 mu s/cm; drying with hot air at 120 deg.C for 20 min;
(4) performing vacuum plasma treatment, wherein the working gas is oxygen with the concentration of 99.999 percent through the plasma treatment; setting the cleaning power to be 1.2 kw; the time is 30 s; vacuum degree of cavity 5 x 10-2 Pa, the flow of the charged oxygen is 50-150 cc/min; carrying out omnibearing plasma treatment on the front surface, the side surface and the inner cavity of the hub, wherein the hub rotates in the cavity;
(5) after the surface treatment of the aluminum alloy hub by plasma, the aluminum alloy hub is transferred into a coating cabin body in a vacuum environment. Alternately mounting a nickel-chromium alloy target and a niobium oxide target; three-stage coating control method, the vacuum degree of the first stage equipment reaches 5 x 10-3Pa, filling argon gas with the flow rate of the argon gas being 60 cc/min; starting the nickel-chromium-gold target material with the power of 12 kw; simultaneously turning on oxygenNiobium melting target material with power of 0.5 kw; the rotation speed of the wheel is 2s for one circle; coating time is 6 s; the vacuum degree of the second stage equipment reaches 5 x 10-3Pa, argon flow 80cc/min, and oxygen 30 cc/min; starting the nickel-chromium-gold target material with the power of 13 kw; starting the niobium oxide target material with the power of 12 kw; the rotation speed of the wheel is 2s for one circle; coating time is 20 s; the vacuum degree of the third stage equipment reaches 5 x 10-3Pa, argon flow 80cc/min, and oxygen 25 cc/min; starting the nickel-chromium-gold target material with the power of 0.5 kw; simultaneously starting the niobium oxide target material with the power of 13 kw; the rotation speed of the wheel is 2s for one circle; coating time is 60 s;
the purity of the used nickel-chromium alloy and niobium oxide target materials is not less than 99.95 percent, and the purity of the used argon is not less than 99.999 percent; the purity of oxygen is not lower than 99.999%;
(6) spraying transparent powder, spraying the transparent powder on the surface of the wheel hub after film coating, and baking and curing to form a high-transparency organic coating. The thickness of the transparent coating is 120 mu m, the curing temperature of the hub surface is 177 ℃, the curing time is 20min, and the hardness of the coating after curing is H grade.
The aluminium alloys of examples 1 and 2 and comparative example 1 were surface treated and then subjected to colour, adhesion 168H CASS, FLIFORM, 1000H NASS, as shown in the following table:
Figure 164272DEST_PATH_IMAGE002
therefore, in the method, the corrosion resistance, the adhesive force and the like of the surface coating treatment method of the aluminum alloy hub meet the standards of automobile factories. Through the process, the coating film with good performance is obtained. In the invention, the technical scheme of the embodiment obtains the optimal condition by groping the above conditions, and the coating detection experiment result is the best under the optimal condition.
The vacuum coating method for the surface of the aluminum alloy wheel has the following advantages.
The method for vacuum coating the surface of the aluminum alloy wheel has the advantages that: (1) the appearance of the blue decorative coating film on the aluminum alloy polished surface is realized; (2) the process improves the binding force between the coating film and the surface of the aluminum alloy; (3) the process improves the ductility of the coating layer and solves the problem of coating cracking; (4) the process solves the corrosion resistance problem of the blue bright coating on the surface of the aluminum alloy; (5) the process solves the problems of adhesion and durability between the coating film and the sprayed transparent powder; (6) the process solves the problems of adhesive force and durability between the coating film and the matte spraying transparent powder; (7) the blue coating film replaces other coating film modes with the same color, and is green and environment-friendly. The technical scheme of the invention can also be applied to other aluminum alloy surface treatment purposes, such as electronic product shells, automobile interior and exterior trimming parts and the like.
The method can form the high-brightness blue coating on the polished surface of the aluminum alloy wheel, and the coating has the advantages of better corrosion resistance, low cost, less energy consumption and green and environment-friendly process. The powder coating is further transparently sprayed on the coating film, so that the process is environment-friendly, the process flow is simplified, and the production efficiency is high. The formed coating and the organic coating meet the requirements of a protective film, and have beautiful appearance and excellent performance. The method conforms to the high-end and green development idea of the manufacturing industry and is the direction of the development of the diversified technology of the wheel coating in the future.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The vacuum coating method for the surface of the aluminum alloy wheel is characterized by comprising the following steps of: the method comprises the following steps of grinding and polishing the surface of the aluminum wheel, cleaning, carrying out surface chemical passivation treatment on the aluminum wheel, carrying out plasma treatment on the surface of the aluminum wheel, carrying out PVD (physical vapor deposition) blue coating and spraying transparent powder.
2. The aluminum alloy wheel surface vacuum coating method of claim 1, wherein the aluminum alloy wheel surface grinding and polishing comprises sand blasting, fine grinding, rough polishing and mirror polishing.
3. The aluminum alloy wheel surface vacuum coating method of claim 2, wherein the mirror polishing comprises mechanical polishing and/or finishing polishing.
4. The aluminum alloy wheel surface vacuum coating method of claim 1, wherein the aluminum alloy wheel surface chemical passivation treatment comprises a silane concentration of 10-30 mg/L and a titanium fluoride concentration of 30-50 mg/L; the hydrofluoric acid is used for adjusting the acid concentration of the solution, and the aqueous solution with the pH value of 3.5-4.0 is used for carrying out chemical passivation treatment on the surface of the aluminum alloy wheel to form Al on the surface2O3.SiO2.TiO2A hybrid passivation film.
5. The aluminum alloy wheel surface vacuum coating method of claim 4, wherein the spraying time is 60-100 s; then spraying deionized water, and controlling the conductivity to be less than or equal to 10 mu s/cm; after cleaning, drying with hot air, wherein the drying temperature of the wheel is more than 110 ℃, and the baking time is more than 20 min.
6. The method for vacuum coating of the surface of the aluminum alloy wheel according to claim 1, wherein the plasma treatment of the surface of the aluminum alloy wheel comprises plasma treatment of the front, the side and the inner cavity of the wheel in all directions by using a radio frequency technology and using 99.999% of oxygen as a working gas.
7. The aluminum alloy wheel surface vacuum coating method of claim 6, wherein the radio frequency power is set at 1.0-2.0 kw; cleaning time is 20-40s, and vacuum degree of cavity is 5 x 10-2 Pa, and the flow rate of the charged oxygen is 50-150 cc/min.
8. The aluminum alloy wheel surface vacuum coating method of claim 1, wherein the PVD blue coating comprises a multi-target layout of coating equipment, and the targets are alternately provided with a nickel-chromium alloy target and a niobium oxide target one by one; by adopting a three-stage coating control method, the vacuum degree of the first stage equipment reaches 5 x 10-3Pa, filling argon with the flow rate of 50-80 cc/min; starting the nickel-chromium-gold target material with the power of 10-15 kw; simultaneously starting the niobium oxide target material with the power of 0.5-1.0 kw; the rotation speed of the wheel is 2s for one circle; the coating time is 6-20s; the vacuum degree of the second stage equipment reaches 5 x 10-3Pa, argon flow 60-100 cc/min, and oxygen 10-40 cc/min; starting the nickel-chromium-gold target material with the power of 8-15 kw; simultaneously starting the niobium oxide target material with the power of 8-14 kw; the rotation speed of the wheel is 2s for one circle; the film coating time is 6-20 s; the vacuum degree of the third stage equipment reaches 5 x 10-3Pa, argon flow 60-100 cc/min, and oxygen 10-40 cc/min; starting the nickel-chromium-gold target material with the power of 0.5-1.0 kw; simultaneously starting the niobium oxide target material with the power of 8-14 kw; the rotation speed of the wheel is 2s for one circle; the coating time is 40-80 s.
9. The aluminum alloy wheel surface vacuum coating method of claim 8, wherein the purity of the material of the nickel-chromium alloy and niobium oxide target is not less than 99.95%, and the argon purity is not less than 99.999%; the purity of oxygen is not less than 99.999%.
10. The aluminum alloy wheel surface vacuum coating method of claim 1, wherein the sprayed transparent powder comprises acrylic resin.
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