CN106086988A - A kind of laser melting coating closes the method for aluminium alloy anode oxide film - Google Patents

A kind of laser melting coating closes the method for aluminium alloy anode oxide film Download PDF

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CN106086988A
CN106086988A CN201610645683.5A CN201610645683A CN106086988A CN 106086988 A CN106086988 A CN 106086988A CN 201610645683 A CN201610645683 A CN 201610645683A CN 106086988 A CN106086988 A CN 106086988A
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aluminum alloy
powder
anodized film
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CN106086988B (en
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周圣丰
戴晓琴
王梅丰
雷剑波
郭津博
顾振杰
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Tiangong University
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/24—Chemical after-treatment
    • C25D11/246—Chemical after-treatment for sealing layers
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/003—Alloys based on aluminium containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C22C30/04—Alloys containing less than 50% by weight of each constituent containing tin or lead
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
    • C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
    • C22C32/0036—Matrix based on Al, Mg, Be or alloys thereof
    • 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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides

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Abstract

一种激光熔覆封闭铝合金阳极氧化膜的方法，该方法的特点是：（1）将铝合金阳极氧化膜在装有酒精的超声波清洗器中清洗；（2）将专用铝合金粉末球磨成粒径为2~10微米的熔覆粉末，然后在充有氩气的密封室内进行激光熔覆处理，实现铝合金阳极氧化膜的封闭。本发明采用专用的铝合金粉末，使用激光熔覆技术将其熔化，发生复杂的冶金化学反应后，快速凝固形成的熔覆层能够有效地封闭铝合金阳极氧化膜。因此，本发明的方法效率高、成本低，可以使铝合金阳极氧化膜的致密性提高到98%以上，从而极大地提高铝合金阳极氧化膜的装饰性、耐蚀性与使用寿命。A method for laser cladding and sealing aluminum alloy anodized film, the method is characterized by: (1) cleaning the aluminum alloy anodized film in an ultrasonic cleaner equipped with alcohol; (2) ball-milling special aluminum alloy powder into The cladding powder with a particle size of 2-10 microns is then subjected to laser cladding treatment in a sealed chamber filled with argon to achieve the sealing of the aluminum alloy anodized film. The invention adopts special aluminum alloy powder, melts it by laser cladding technology, and after complex metallurgical chemical reaction occurs, the cladding layer formed by rapid solidification can effectively seal the aluminum alloy anodic oxidation film. Therefore, the method of the present invention has high efficiency and low cost, and can increase the compactness of the aluminum alloy anodized film to more than 98%, thereby greatly improving the decoration, corrosion resistance and service life of the aluminum alloy anodized film.

Description

一种激光熔覆封闭铝合金阳极氧化膜的方法A method of laser cladding and sealing aluminum alloy anodized film

技术领域technical field

本发明属于材料科学与表面工程技术领域，特别涉及一种激光熔覆封闭铝合金阳极氧化膜的方法。The invention belongs to the technical field of material science and surface engineering, in particular to a method for laser cladding and sealing aluminum alloy anodized film.

背景技术Background technique

铝合金具有密度小、强度高、易加工、价格低廉等优点，在工业领域具有十分广泛的应用。但是，铝合金在酸碱溶液或与其他高电位的金属接触时易发生腐蚀，极大地限制了其应用范围。因此，对铝合金进行表面处理，提高其耐蚀性能具有十分重要的意义。Aluminum alloy has the advantages of low density, high strength, easy processing, and low price, and has a very wide range of applications in the industrial field. However, aluminum alloys are prone to corrosion in acid-base solutions or in contact with other high-potential metals, which greatly limits its application range. Therefore, it is of great significance to carry out surface treatment on aluminum alloy to improve its corrosion resistance.

一般而言，对铝合金表面进行阳极氧化与封闭处理，不仅可以提高铝合金的装饰性、抗污性与耐蚀性，而且可以赋予铝合金表面的阳极氧化膜一定的功能性。目前，对铝合金阳极氧化膜进行封闭处理的方法主要有：高温水蒸气封闭，以NiF2为主的常温封闭，以铬酸盐、硅酸盐等为主的无机盐封闭，利用硬脂酸等为主的有机酸封闭。尽管这些方法在一定程度上能够对铝合金表面阳极氧化膜进行封闭处理，但是这些方法的加工效率偏低，不同程度上存在环境污染，以及得到的封闭膜柔性性较差、封孔率不高导致铝合金耐蚀性较差等问题。Generally speaking, anodizing and sealing the aluminum alloy surface can not only improve the decoration, stain resistance and corrosion resistance of the aluminum alloy, but also endow the anodized film on the aluminum alloy surface with certain functionality. At present, the methods for sealing the aluminum alloy anodized film mainly include: high temperature water vapor sealing, normal temperature sealing mainly based on NiF 2 , inorganic salt sealing mainly based on chromate, silicate, etc., using stearic acid Such as the main organic acid blocking. Although these methods can seal the anodized film on the surface of aluminum alloy to a certain extent, the processing efficiency of these methods is low, there are environmental pollution to varying degrees, and the obtained sealing film has poor flexibility and low sealing rate. This leads to problems such as poor corrosion resistance of aluminum alloys.

激光熔覆是一种新的表面改性技术，它通过在基材表面添加熔覆材料，并利用高能密度的激光束使之快速熔化，当激光束扫描过后快速凝固形成熔覆层，该方法具有绿色环保、自动化程度高、制备的材料组织细小且致密等优点。但是，使用激光覆专用铝合金粉末封闭铝合金阳极氧化膜的方法还未见文献报道。Laser cladding is a new surface modification technology. It adds cladding materials on the surface of the substrate and uses high-energy-density laser beams to melt them quickly. When the laser beam scans, it solidifies quickly to form a cladding layer. It has the advantages of environmental protection, high degree of automation, and the prepared materials are fine and dense. However, the method of using special aluminum alloy powder for laser coating to seal the aluminum alloy anodized film has not been reported in the literature.

发明内容Contents of the invention

本发明的目的在于提供一种激光熔覆封闭铝合金阳极氧化膜的方法。本发明是这样来实现的，其方法与步骤为：The object of the present invention is to provide a method for laser cladding and sealing aluminum alloy anodized film. The present invention is achieved like this, and its method and steps are:

（1）将铝合金阳极氧化膜在装有酒精的超声波清洗器中清洗；(1) Clean the aluminum alloy anodized film in an ultrasonic cleaner filled with alcohol;

（2）熔覆粉末的制备：将专用铝合金粉末放置于高能球磨机内进行机械合金化处理，获得粒径为2~10微米以及物相主要由α-Al、Al2Cu与富Sn组成的熔覆粉末；(2) Preparation of cladding powder: Place the special aluminum alloy powder in a high-energy ball mill for mechanical alloying treatment to obtain a powder with a particle size of 2-10 microns and a phase mainly composed of α-Al, Al 2 Cu and Sn-rich cladding powder;

（3）将熔覆粉末预置于铝合金阳极氧化膜表面，在充有氩气的密封室内进行激光熔覆处理，实现铝合金阳极氧化膜的封闭。(3) The cladding powder is pre-placed on the surface of the aluminum alloy anodized film, and laser cladding is performed in a sealed chamber filled with argon to realize the sealing of the aluminum alloy anodized film.

本发明在进行所述的步骤（2）时，专用铝合金粉末的化学成分为：Si 3.0~15.0wt.%，B 2.0~5.0 wt.%，CeO2 0.2~1.0 wt.%，Ni 0.5~1.8 wt.%，Cu 5.0~10.0 wt.%，Sn15.0~30.0 wt.%，余量为Al；球磨工艺参数为：转速400~450转/分，时间为10~15小时，球磨过程中使用直径为2~10mm的不锈钢球，不锈钢球与专用铝合金粉末的质量比为8:1，使用液氮保护，防止专用铝合金粉末氧化；When performing the step (2) of the present invention, the chemical composition of the special aluminum alloy powder is: Si 3.0~15.0wt.%, B 2.0~5.0 wt.%, CeO 2 0.2~1.0 wt.%, Ni 0.5~ 1.8 wt.%, Cu 5.0~10.0 wt.%, Sn15.0~30.0 wt.%, the balance is Al; ball milling process parameters are: speed 400~450 rpm, time 10~15 hours, during ball milling Use stainless steel balls with a diameter of 2~10mm, the mass ratio of stainless steel balls to special aluminum alloy powder is 8:1, use liquid nitrogen protection to prevent the special aluminum alloy powder from oxidation;

本发明在进行所述的步骤（3）时，熔覆粉末的预置厚度为0.5~1.0mm；在充有氩气的密封室内进行激光熔覆的工艺参数为：半导体激光器功率0.5~0.8kW，光斑直径15mm×5mm，扫描速度300~480mm/min。In the present invention, when the step (3) is carried out, the preset thickness of the cladding powder is 0.5~1.0mm; the process parameters for laser cladding in a sealed chamber filled with argon are: semiconductor laser power 0.5~0.8kW , spot diameter 15mm×5mm, scanning speed 300~480mm/min.

与现有的技术相比，本发明的优点是：采用基于专用铝合金粉末的激光熔覆封闭铝合金阳极氧化膜的方法属于无污染、自动化程度高的绿色制造技术，效率高、成本低，可以使铝合金阳极氧化膜的致密性提高到98%以上，从而极大地提高铝合金阳极氧化膜的装饰性、耐蚀性与使用寿命。Compared with the existing technology, the advantages of the present invention are: the method of sealing the aluminum alloy anodic oxide film by laser cladding based on special aluminum alloy powder is a green manufacturing technology with no pollution and high automation, high efficiency and low cost. It can increase the compactness of aluminum alloy anodized film to more than 98%, thereby greatly improving the decoration, corrosion resistance and service life of aluminum alloy anodized film.

具体实施方式detailed description

实施例1Example 1

采用激光熔覆技术对LY6铝合金阳极氧化膜进行封闭处理，试样尺寸为150mm×80mm×5 mm（长×宽×高），经检测：经过激光熔覆封闭处理的LY6铝合金阳极氧化膜的孔隙率小于5%，具体实施过程如下：Laser cladding technology is used to seal the LY6 aluminum alloy anodized film. The sample size is 150mm×80mm×5 mm (length×width×height). After testing: LY6 aluminum alloy anodized film that has been sealed by laser cladding The porosity is less than 5%, the specific implementation process is as follows:

（1）将铝合金阳极氧化膜在装有酒精的超声波清洗器中清洗；(1) Clean the aluminum alloy anodized film in an ultrasonic cleaner filled with alcohol;

（2）熔覆粉末的制备：将专用铝合金粉末放置于高能球磨机内进行机械合金化处理，获得平均粒径约为2微米以及物相主要由α-Al、Al2Cu与富Sn组成的熔覆粉末；专用铝合金粉末的化学成分为：Si 3.0~15.0 wt.%，B 2.0~5.0 wt.%，CeO2 0.2~1.0 wt.%，Ni 0.5~1.8wt.%，Cu 5.0~10.0 wt.%，Sn 15.0~30.0 wt.%，余量为Al；球磨工艺参数为：转速400转/分，时间为15小时，球磨过程中使用直径为2~10mm的不锈钢球，不锈钢球与专用铝合金粉末的质量比为8:1，使用液氮保护，防止专用铝合金粉末氧化；(2) Preparation of cladding powder: Place the special aluminum alloy powder in a high-energy ball mill for mechanical alloying treatment to obtain a powder with an average particle size of about 2 microns and a phase mainly composed of α-Al, Al 2 Cu and Sn-rich Cladding powder; the chemical composition of special aluminum alloy powder is: Si 3.0~15.0 wt.%, B 2.0~5.0 wt.%, CeO 2 0.2~1.0 wt.%, Ni 0.5~1.8wt.%, Cu 5.0~10.0 wt.%, Sn 15.0~30.0 wt.%, the balance is Al; ball milling process parameters are: speed 400 rpm, time 15 hours, use stainless steel balls with a diameter of 2~10mm in the ball milling process, stainless steel balls and special The mass ratio of aluminum alloy powder is 8:1, and it is protected by liquid nitrogen to prevent oxidation of special aluminum alloy powder;

（3）将熔覆粉末预置于铝合金阳极氧化膜表面，在充有氩气的密封室内进行激光熔覆处理，实现铝合金阳极氧化膜的封闭；熔覆粉末的预置厚度为0.5mm；在充有氩气的密封室内进行激光熔覆的工艺参数为：半导体激光器功率0.5kW，光斑直径15mm×5mm，扫描速度300mm/min。(3) The cladding powder is pre-placed on the surface of the aluminum alloy anodic oxide film, and laser cladding is performed in a sealed chamber filled with argon to realize the sealing of the aluminum alloy anodic oxide film; the preset thickness of the cladding powder is 0.5mm ; The technological parameters of laser cladding in a sealed chamber filled with argon gas are: semiconductor laser power 0.5kW, spot diameter 15mm×5mm, scanning speed 300mm/min.

实施例2Example 2

采用激光熔覆技术对2A12铝合金阳极氧化膜进行封闭处理，试样尺寸为120mm×60mm×4mm（长×宽×高），经检测：经过激光熔覆封闭处理的2A12铝合金阳极氧化膜的孔隙率小于3%，具体实施过程如下：Laser cladding technology is used to seal the 2A12 aluminum alloy anodized film. The sample size is 120mm×60mm×4mm (length×width×height). The porosity is less than 3%, the specific implementation process is as follows:

（1）将铝合金阳极氧化膜在装有酒精的超声波清洗器中清洗；(1) Clean the aluminum alloy anodized film in an ultrasonic cleaner filled with alcohol;

（2）熔覆粉末的制备：将专用铝合金粉末放置于高能球磨机内进行机械合金化处理，获得平均粒径约为5微米以及物相主要由α-Al、Al2Cu与富Sn组成的熔覆粉末；专用铝合金粉末的化学成分为：Si 3.0~15.0 wt.%，B 2.0~5.0 wt.%，CeO2 0.2~1.0 wt.%，Ni 0.5~1.8wt.%，Cu 5.0~10.0 wt.%，Sn 15.0~30.0 wt.%，余量为Al；球磨工艺参数为：转速420转/分，时间为12小时，球磨过程中使用直径为2~10mm的不锈钢球，不锈钢球与专用铝合金粉末的质量比为8:1，使用液氮保护，防止专用铝合金粉末氧化；(2) Preparation of cladding powder: Place the special aluminum alloy powder in a high-energy ball mill for mechanical alloying treatment to obtain a powder with an average particle size of about 5 microns and a phase mainly composed of α-Al, Al 2 Cu and Sn-rich Cladding powder; the chemical composition of special aluminum alloy powder is: Si 3.0~15.0 wt.%, B 2.0~5.0 wt.%, CeO 2 0.2~1.0 wt.%, Ni 0.5~1.8wt.%, Cu 5.0~10.0 wt.%, Sn 15.0~30.0 wt.%, the balance is Al; ball milling process parameters are: speed 420 rpm, time 12 hours, use stainless steel balls with a diameter of 2~10mm in the ball milling process, stainless steel balls and special The mass ratio of aluminum alloy powder is 8:1, and it is protected by liquid nitrogen to prevent oxidation of special aluminum alloy powder;

（3）将熔覆粉末预置于铝合金阳极氧化膜表面，在充有氩气的密封室内进行激光熔覆处理，实现铝合金阳极氧化膜的封闭；熔覆粉末的预置厚度为0.8mm；在充有氩气的密封室内进行激光熔覆的工艺参数为：半导体激光器功率0.65kW，光斑直径15mm×5mm，扫描速度400mm/min。(3) Pre-place the cladding powder on the surface of the aluminum alloy anodic oxide film, and perform laser cladding treatment in a sealed chamber filled with argon to realize the sealing of the aluminum alloy anodic oxide film; the preset thickness of the cladding powder is 0.8mm ; The process parameters of laser cladding in a sealed chamber filled with argon gas are: semiconductor laser power 0.65kW, spot diameter 15mm×5mm, scanning speed 400mm/min.

实施例3Example 3

采用激光熔覆技术对ZAlCu5Mn铝合金阳极氧化膜进行封闭处理，试样尺寸为100mm×50mm×3mm（长×宽×高），经检测：经过激光熔覆封闭处理的ZAlCu5Mn铝合金阳极氧化膜的孔隙率小于2%，具体实施过程如下：Laser cladding technology is used to seal the ZAlCu5Mn aluminum alloy anodized film. The sample size is 100mm×50mm×3mm (length×width×height). The porosity is less than 2%, the specific implementation process is as follows:

（1）将铝合金阳极氧化膜在装有酒精的超声波清洗器中清洗；(1) Clean the aluminum alloy anodized film in an ultrasonic cleaner filled with alcohol;

（2）熔覆粉末的制备：将专用铝合金粉末放置于高能球磨机内进行机械合金化处理，获得平均粒径约为10微米以及物相主要由α-Al、Al2Cu与富Sn组成的熔覆粉末；专用铝合金粉末的化学成分为：Si 3.0~15.0 wt.%，B 2.0~5.0 wt.%，CeO2 0.2~1.0 wt.%，Ni 0.5~1.8wt.%，Cu 5.0~10.0 wt.%，Sn 15.0~30.0 wt.%，余量为Al；球磨工艺参数为：转速450转/分，时间为10小时，球磨过程中使用直径为2~10mm的不锈钢球，不锈钢球与专用铝合金粉末的质量比为8:1，使用液氮保护，防止专用铝合金粉末氧化；(2) Preparation of cladding powder: Place the special aluminum alloy powder in a high-energy ball mill for mechanical alloying treatment to obtain a powder with an average particle size of about 10 microns and a phase mainly composed of α-Al, Al 2 Cu and Sn-rich Cladding powder; the chemical composition of special aluminum alloy powder is: Si 3.0~15.0 wt.%, B 2.0~5.0 wt.%, CeO 2 0.2~1.0 wt.%, Ni 0.5~1.8wt.%, Cu 5.0~10.0 wt.%, Sn 15.0~30.0 wt.%, the balance is Al; ball milling process parameters are: speed 450 rpm, time 10 hours, use stainless steel balls with a diameter of 2~10mm in the ball milling process, stainless steel balls and special The mass ratio of aluminum alloy powder is 8:1, and it is protected by liquid nitrogen to prevent oxidation of special aluminum alloy powder;

（3）将熔覆粉末预置于铝合金阳极氧化膜表面，在充有氩气的密封室内进行激光熔覆处理，实现铝合金阳极氧化膜的封闭；熔覆粉末的预置厚度为1.0mm；在充有氩气的密封室内进行激光熔覆的工艺参数为：半导体激光器功率0.8kW，光斑直径15mm×5 mm，扫描速度480mm/min。(3) Pre-place the cladding powder on the surface of the aluminum alloy anodic oxide film, and perform laser cladding treatment in a sealed chamber filled with argon to realize the sealing of the aluminum alloy anodic oxide film; the preset thickness of the cladding powder is 1.0mm ; The process parameters of laser cladding in a sealed chamber filled with argon are: semiconductor laser power 0.8kW, spot diameter 15mm×5mm, scanning speed 480mm/min.

Claims (3)

1.一种激光熔覆封闭铝合金阳极氧化膜的方法，其方法与步骤为：1. A method of laser cladding sealing aluminum alloy anodized film, its method and steps are: （1）将铝合金阳极氧化膜在装有酒精的超声波清洗器中清洗；(1) Clean the aluminum alloy anodized film in an ultrasonic cleaner filled with alcohol; （2）熔覆粉末的制备：将专用铝合金粉末放置于高能球磨机内进行机械合金化处理，获得粒径为2~10微米以及物相主要由α-Al、Al2Cu与富Sn组成的熔覆粉末；(2) Preparation of cladding powder: Place the special aluminum alloy powder in a high-energy ball mill for mechanical alloying treatment to obtain a powder with a particle size of 2-10 microns and a phase mainly composed of α-Al, Al 2 Cu and Sn-rich cladding powder; （3）将熔覆粉末预置于铝合金阳极氧化膜表面，然后在充有氩气的密封室内进行激光熔覆处理，实现铝合金阳极氧化膜的封闭。(3) The cladding powder is pre-placed on the surface of the aluminum alloy anodized film, and then laser cladding is carried out in a sealed chamber filled with argon to realize the sealing of the aluminum alloy anodized film. 2.根据权利要求1所述的一种激光熔覆封闭铝合金阳极氧化膜的方法，其特征在于：步骤（2）中，专用铝合金粉末的化学成分为：Si 3.0~15.0 wt.%，B 2.0~5.0 wt.%，CeO2 0.2~1.0 wt.%，Ni 0.5~1.8 wt.%，Cu 5.0~10.0 wt.%，Sn 15.0~30.0 wt.%，余量为Al；球磨工艺参数为：转速400~450转/分，时间为10~15小时，球磨过程中使用直径为2~10mm的不锈钢球，不锈钢球与专用铝合金粉末的质量比为8:1，使用液氮保护，防止专用铝合金在球磨过程中氧化。2. A method for laser cladding and sealing aluminum alloy anodized film according to claim 1, characterized in that: in step (2), the chemical composition of the special aluminum alloy powder is: Si 3.0~15.0 wt.%, B 2.0~5.0 wt.%, CeO 2 0.2~1.0 wt.%, Ni 0.5~1.8 wt.%, Cu 5.0~10.0 wt.%, Sn 15.0~30.0 wt.%, the balance is Al; the ball milling process parameters are : The speed is 400~450 rpm, the time is 10~15 hours, stainless steel balls with a diameter of 2~10mm are used in the ball milling process, the mass ratio of stainless steel balls to special aluminum alloy powder is 8:1, and liquid nitrogen is used for protection to prevent The special aluminum alloy is oxidized during the ball milling process. 3.根据权利要求1所述的一种激光熔覆封闭铝合金阳极氧化膜的方法，其特征在于：步骤（3）中，熔覆粉末的预置厚度为0.5~1.0mm；激光熔覆的工艺参数为：半导体激光器功率0.5~0.8kW，光斑直径15mm×5mm，扫描速度300~480mm/min。3. A method for laser cladding and sealing the anodized film of aluminum alloy according to claim 1, characterized in that: in step (3), the preset thickness of the cladding powder is 0.5~1.0mm; The process parameters are: semiconductor laser power 0.5~0.8kW, spot diameter 15mm×5mm, scanning speed 300~480mm/min.
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