A modification method for improving the oxidation resistance of aluminide cladding coating

Abstract

The application provides a modification method for improving the oxidation resistance of an aluminide cladding coating, and comprises the following steps: stirring, ball milling, and drying 50-80% of NiAl, 10-40% of Al, 1-5% of Pd, 2-5% of Ti, and 2-5% of NH4Cl according to the mass percentage of solid phase components to prepare cladding powder; wherein the sum of the mass percentages of the solid phase components is 100%; performing surface cleaning treatment on a workpiece to be plated for standby, pouring sufficient cladding powder into a feeding port of an ion cladding device; placing the workpiece to be plated in an inert atmosphere, spraying the cladding powder on the surface of the workpiece to be plated by using the ion cladding device to perform plasma cladding, and obtaining an aluminide cladding coating after cooling; and performing treatment on cladding residues. One technical effect of the application is that the design is reasonable, and the oxidation resistance of the aluminide cladding coating is improved.

Description

Technical Field

[0001] This invention belongs to the field of material surface alloying and coating preparation technology, specifically relating to a modification method for improving the oxidation resistance of aluminide cladding coatings. Background Technology

[0002] In industrial production, boiler pipes play a vital role in energy transmission and production processes. Because boiler pipes frequently operate in harsh environments such as high temperature, high pressure, and high humidity, they are susceptible to oxidation and corrosion, necessitating measures to protect their surfaces from oxidative damage. Therefore, researching and developing anti-oxidation and corrosion-resistant technologies for the inner and outer walls of pipes used in boiler units is of significant practical importance.

[0003] Studies have shown that high-temperature coatings are highly effective in addressing oxidation corrosion, wear, and high-temperature ablation in components, and are widely used in various industrial boiler systems. While current aluminide coatings exhibit superior oxidation resistance in flow-through components of high aspect ratio energy equipment, the decrease in Al content within the coating inevitably affects its oxidation resistance as service life increases and unit power grows. Furthermore, the oxidation and thermal corrosion resistance of single aluminide coatings under complex operating conditions such as thermal corrosion, oxidation, and flue gas exposure needs further improvement.

[0004] Therefore, there is an urgent need for a modification method to improve the oxidation resistance of aluminide cladding coatings, so as to achieve the preparation of novel coatings with excellent comprehensive performance that are suitable for various complex shapes such as workpieces with large aspect ratios and oxidation and heat corrosion resistance. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art, and to provide a new technical solution for a modification method to improve the oxidation resistance of aluminide cladding coatings.

[0006] According to one aspect of the present invention, a modification method for improving the oxidation resistance of aluminide cladding coating is provided, comprising the following steps:

[0007] Step S1: The solid components are stirred, ball-milled, and dried according to the mass percentage of 50-80% NiAl, 10-40% Al, 1-5% Pd, 2-5% Ti, and 2-5% NH4Cl to prepare cladding powder; wherein the sum of the mass percentages of each solid component is 100%.

[0008] Step S2: Clean the surface of the workpiece to be plated and set it aside. Pour a sufficient amount of cladding powder into the feed port of the ion cladding device.

[0009] Step S3, placing the workpiece to be plated in an inert atmosphere, using an ion cladding device to spray the cladding powder on the surface of the workpiece to be plated to carry out plasma cladding, and obtaining an aluminide cladding coating after cooling;

[0010] Step S4, processing the cladding residue.

[0011] Optionally, in step S1, the NiAl, Al, Pd and Ti are in powder form, and the NiAl, Al, Pd and Ti are sieved through a 1000-mesh sieve.

[0012] Optionally, in step S1, the cladding powder is obtained by drying after wet milling of the solid phase components by a planetary ball mill.

[0013] Optionally, when wet milling the solid phase components by the planetary ball mill, the wet milling medium is anhydrous ethanol, the ball milling rotation speed is 350-400 rpm, the time is 12-24 h, and the drying condition is vacuum drying at 80-120 DEG C for 12-24 h.

[0014] Optionally, the process parameters of the plasma cladding are as follows:

[0015] The cladding current is 80-120 A, the feeding rate is 18-22 g / min, the scanning rate is 20-40 cm / min, the nozzle height is 8-12 mm, the rotation speed is 2-5 r / min, the ion gas flow is 0.2-0.3 L / min, and the protective gas flow is 18-20 L / min.

[0016] Optionally, the inert gas in the inert atmosphere is Ar or N2.

[0017] Optionally, in step S2, the surface of the workpiece to be plated is cleaned by a high-pressure water gun for 5 min, and then washed clean with alcohol or acetone.

[0018] Optionally, the processing of the cladding residue comprises:

[0019] The cladding residue on the surface of the workpiece is washed by a high-pressure water gun, and then naturally air-dried.

[0020] Optionally, in step S3, the thickness of the aluminide cladding coating is 0.78-1.84 mm.

[0021] Optionally, the mass percentage of the NiAl is 50%, the mass percentage of the Al is 35%, the mass percentage of the Pd is 5%, the mass percentage of the Ti is 5%, and the mass percentage of the NH4Cl is 5%.

[0022] One technical effect of the present application is that:

[0023] In the embodiment of the present application, the modification method for improving the oxidation resistance of the aluminum compound cladding coating is to prepare the aluminum compound cladding coating by using the plasma cladding process. Since the plasma cladding process has the advantages of concentrated heat, short action time and small heat affected zone of the cladding area, the aluminum compound cladding coating has high bonding strength with the base material. Meanwhile, the modification method for improving the oxidation resistance of the aluminum compound cladding coating is to prepare the aluminum compound cladding coating by using an integrated production line. The production efficiency of the aluminum compound cladding coating is high, the thickness of the aluminum compound cladding coating is controllable, the process has high repeatability, and has strong practicability.

[0024] In addition, by adding Pd and Ti elements in the components of the cladding powder to modify the aluminum compound coating, the stability and density of the aluminum compound cladding coating are significantly improved, and the oxidation resistance of the aluminum compound cladding coating is enhanced. Further, by adding NH4Cl in the components of the cladding powder, the effect of catalyzing and activating is achieved, so that the penetration speed and the quality of the aluminum compound cladding coating are improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A flowchart of a modification method for improving the oxidation resistance of an aluminum compound cladding coating according to an embodiment of the present application is shown in FIG. 1.

[0026] Figure 2 A cross-sectional morphology diagram of an aluminum compound cladding coating according to an embodiment of the present application is shown in FIG. 2. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0028] The embodiments of the present application will be described in detail below, examples of which are shown in the accompanying drawings, in which the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0029] The terms "first", "second" in the specification and claims of the present application can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0030] According to one aspect of the present application, referring to Figure 1 , there is provided a modification method for improving the oxidation resistance of an aluminide cladding coating, which is suitable for the preparation of oxidation-resistant coatings of austenitic steel and high-temperature alloy parts for large long-diameter ratio and various complex-shaped workpieces such as large boilers and oil and gas field transportation pipelines.

[0031] Specifically, the modification method for improving the oxidation resistance of the aluminide cladding coating comprises the following steps:

[0032] Step S1, 50-80% of NiAl, 10-40% of Al, 1-5% of Pd, 2-5% of Ti and 2-5% of NH4Cl are stirred, ball milled and dried according to the mass percentage to prepare cladding powder; wherein the sum of the mass percentages of the solid phase components is 100%; wherein the source is NiAl and Al powder, the modifier is Pd and Ti, and the activator is NH4Cl;

[0033] Step S2, the surface of the workpiece to be plated is cleaned for standby, and a sufficient amount of cladding powder is poured into the feeding port of the ion cladding device;

[0034] Step S3, the workpiece to be plated is placed in an inert atmosphere, and the ion cladding device is used to spray the cladding powder on the surface of the workpiece to be plated to perform plasma cladding, and an aluminide cladding coating is obtained after cooling;

[0035] Step S4, the cladding residue is treated.

[0036] In the embodiments of the present application, the modification method for improving the oxidation resistance of the aluminide cladding coating prepares the aluminide cladding coating by using the plasma cladding process. Since the plasma cladding process has the advantages of concentrated heat, short action time and small heat affected zone of the cladding area, the aluminide cladding coating has high bonding strength with the base material. At the same time, the modification method for improving the oxidation resistance of the aluminide cladding coating prepares the aluminide cladding coating by using an integrated production line. The production efficiency of the aluminide cladding coating is high, the thickness is controllable, the process has high repeatability, and has strong practicability.

[0037] In addition, by adding Pd and Ti elements to modify the aluminide coating in the components of the cladding powder, the stability and density of the aluminide cladding coating are significantly improved, and the oxidation resistance of the aluminide cladding coating is enhanced. Further, by adding NH4Cl in the components of the cladding powder, the effect of catalyzing and activating is achieved, thereby improving the penetration speed and the quality of the aluminide cladding coating.

[0038] It should be noted that the addition of the modification element Pd can inhibit the diffusion of Al elements, maintain the Al content in the NiAl phase and the aluminide cladding coating, and form a dense oxide film during oxidation to improve the oxidation resistance.

[0039] The addition of the modified element Ti can promote the oxide film transformation process, accelerate the transformation of the θ-Al2O3 phase to the α-Al2O3 phase, and further produce fine-grained corrosion products, thereby improving the "stickiness" of the oxide film and further enhancing the oxidation and corrosion resistance of the coating.

[0040] Optionally, in step S1, the NiAl, Al, Pd, and Ti are in powder form, and the NiAl, Al, Pd, and Ti are sieved through a 1000-mesh sieve.

[0041] In the above embodiment, it is helpful to ensure that the components are more uniformly and finely dispersed, and that impurities and particles are removed, thereby better ensuring the cladding effect of the aluminide cladding coating.

[0042] Optionally, in step S1, the cladding powder is obtained by drying the solid-phase components after wet milling by a planetary ball mill.

[0043] In the above embodiment, the cladding powder with fully uniformly mixed components can be obtained, thereby helping to better ensure the quality of the aluminide cladding coating during the cladding process.

[0044] Optionally, when the solid-phase components are wet milled by the planetary ball mill, the wet milling medium is anhydrous ethanol, the ball milling speed is 350-400 rpm, the time is 12-24 h, and the drying condition is vacuum drying at 80-120°C for 12-24 h.

[0045] In the above embodiment, the wet milling method for the solid-phase components is reasonable, which helps to ensure the uniformity of the fineness of the cladding powder.

[0046] Optionally, the process parameters of the plasma cladding are as follows:

[0047] The cladding current is 80-120 A, the feeding rate is 18-22 g / min, the scanning rate is 20-40 cm / min, the nozzle height is 8-12 mm, the rotation speed is 2-5 r / min, the ion gas flow rate is 0.2-0.3 L / min, and the protective gas flow rate is 18-20 L / min.

[0048] In the above embodiment, the parameters of the plasma cladding process are reasonably set, so that the cladding process has the advantages of concentrated heat, short action time, and small heat-affected zone, thereby making the aluminide cladding coating have a high bonding strength with the base material.

[0049] Optionally, the inert gas in the inert atmosphere is Ar or N2. The chemically stable Ar or N2 is used to provide the inert atmosphere, which helps to ensure that the workpiece to be plated is not oxidized during the cladding process.

[0050] Optionally, in step S2, the surface of the workpiece to be plated is cleaned by a high-pressure water gun for 5 minutes, and then cleaned by alcohol or acetone.

[0051] In the above embodiment, the oil stains, dust and the like on the surface of the workpiece to be plated can be removed, and the oxide skin can be removed, and then cleaned by alcohol or acetone, so that a clean and metallic luster surface is provided for subsequent cladding, thereby helping to ensure the strength and stability of the combination of the surface of the workpiece and the aluminide cladding coating.

[0052] Optionally, the cladding residue is treated, including:

[0053] The cladding residue on the surface of the workpiece is washed by a high-pressure water gun, and then naturally air-dried.

[0054] In the above embodiment, the cladding residue can be thoroughly treated to ensure the cleanliness of the surface of the workpiece.

[0055] Optionally, in step S3, the thickness of the diffusion layer of the aluminide cladding coating is 0.78-1.84 mm. This makes the aluminide cladding coating have good metallurgical bonding performance, so that the aluminide cladding coating has high bonding strength with the base material.

[0056] Optionally, the mass percentage of NiAl is 50%, the mass percentage of Al is 35%, the mass percentage of Pd is 5%, the mass percentage of Ti is 5%, and the mass percentage of NH4Cl is 5%.

[0057] In the above embodiment, the mass percentages of Pd, Ti and NH4Cl are reasonable, which not only helps to further improve the stability and density of the aluminide cladding coating, and enhance the oxidation resistance of the aluminide cladding coating, but also helps to further improve the quality of the aluminide cladding coating.

[0058] It should be noted that the modification method for improving the oxidation resistance of the aluminide cladding coating can prepare an aluminide oxidation-resistant coating with a thickness of 0.78-1.84 mm and good metallurgical bonding under the conditions of adjusting the cladding powder composition, the modification element addition ratio and the main process parameters such as the plasma cladding parameters. Moreover, the aluminide cladding coating obtained by the method has an oxidation resistance that is 20-64 times higher than that of the base material in a 600℃ pure water vapor environment, and has an oxidation resistance that is 24-86 times higher than that of the base material in a 650℃ pure water vapor environment, which indicates that the aluminide cladding coating effectively improves the oxidation resistance of the alloy base material in a water vapor environment.

[0059] Example 1

[0060] Step S1, each component of the solid phase component was weighed according to the mass percentage, including 50% of NiAl, 35% of Al, 5% of Pd, 5% of Ti and 5% of NH4Cl, and was placed in a planetary ball mill for wet grinding, wherein the wet grinding medium was anhydrous ethanol, the ball milling speed was 380 rpm, the time was 24 h, and the cladding powder was obtained after vacuum drying at 100℃ for 24 h.

[0061] Step 2, the surface of the workpiece to be plated was cleaned with a high-pressure water gun for 5 min, and was rinsed clean with alcohol or acetone.

[0062] Step 3, the workpiece to be plated was placed in an inert atmosphere of Ar or N2, and the cladding powder was sprayed on the surface of the workpiece to be plated by using an ion cladding device to carry out plasma cladding, and an aluminide cladding coating with oxidation resistance was obtained after cooling. The plasma cladding process parameters are as follows: cladding current is 90 A, feeding rate is 18 g / min, scanning rate is 35 cm / min, nozzle height is 10 mm, rotation speed is 3 r / min, ion gas flow is 0.2 L / min, and protective gas flow is 19 L / min.

[0063] Step S4, after the cladding is completed, the surface residue of the workpiece is washed with a high-pressure water gun or a high-pressure gas flow, and is naturally air-dried.

[0064] Examples 2-11

[0065] The cladding process of Examples 2-11 is the same as that of Example 1, and the same component ratio of the penetrant is maintained in Examples 1-11. The specific conditions are shown in Table 1. Table 1 is the specific parameters of Examples 1-11 of the modification method for improving the oxidation resistance of the aluminide cladding coating. According to the preparation steps in Example 1 above and the specific preparation parameters in the table, aluminide cladding coatings with different thicknesses can be obtained.

[0066] Table 1

[0067]

[0068] Through analysis and research of the above-mentioned various examples, the thickness of the infiltration layer is about 0.78-1.84 mm, and the specific results are shown in Table 1. The cross-sectional morphology of the cladding coating prepared in Example 1 is shown in Figure 2 According to Table 1 and the cross-sectional morphology, it is found that the infiltration layer has uniform structure, moderate thickness, sufficient Al atom diffusion, and good metallurgical bonding with the substrate, and is not easy to fall off.

[0069] Example 12

[0070] Step S1, each component of the solid phase component was weighed according to the mass percentage, including 80% of NiAl, 10% of Al, 2% of Pd, 4% of Ti and 4% of NH4Cl, and was placed in a planetary ball mill for wet grinding, wherein the wet grinding medium was anhydrous ethanol, the ball milling speed was 350 rpm, the time was 24 h, and the cladding powder was obtained after vacuum drying at 100 ℃ for 24 h.

[0071] Step 2, the surface of the workpiece to be plated was cleaned with a high-pressure water gun for 5 min, and was rinsed clean with alcohol or acetone.

[0072] Step 3, the workpiece to be plated was placed in an inert atmosphere of Ar or N2, and the cladding powder was sprayed on the surface of the workpiece to be plated by using an ion cladding device to carry out plasma cladding, and an aluminide cladding coating with oxidation resistance was obtained after cooling. The plasma cladding process parameters were as follows: cladding current was 110 A, feeding rate was 20 g / min, scanning rate was 35 cm / min, nozzle height was 10 mm, rotation speed was 2 r / min, ion gas flow rate was 0.2 L / min, and protective gas flow rate was 19 L / min.

[0073] Step S4, after the cladding was completed, the surface residue of the workpiece was washed with a high-pressure water gun or a high-pressure gas flow, and was naturally air-dried.

[0074] Example 13

[0075] Step S1, each component of the solid phase component was weighed according to the mass percentage, including 60% of NiAl, 30% of Al, 3% of Pd, 2% of Ti and 5% of NH4Cl, and was placed in a planetary ball mill for wet grinding, wherein the wet grinding medium was anhydrous ethanol, the ball milling speed was 400 rpm, the time was 24 h, and the cladding powder was obtained after vacuum drying at 120 ℃ for 24 h.

[0076] Step 2, the surface of the workpiece to be plated was cleaned with a high-pressure water gun for 5 min, and was rinsed clean with alcohol or acetone.

[0077] Step 3, the workpiece to be plated was placed in an inert atmosphere of Ar, and the cladding powder was sprayed on the surface of the workpiece to be plated by using an ion cladding device to carry out plasma cladding, and an aluminide cladding coating with oxidation resistance was obtained after cooling. The plasma cladding process parameters were as follows: cladding current was 120 A, feeding rate was 20 g / min, scanning rate was 40 cm / min, nozzle height was 12 mm, rotation speed was 5 r / min, ion gas flow rate was 0.2 L / min, and protective gas flow rate was 19 L / min.

[0078] Step S4, after the cladding was completed, the surface residue of the workpiece was washed with a high-pressure water gun or a high-pressure gas flow, and was naturally air-dried.

[0079] Example 14

[0080] Step S1, each component of the solid phase component was weighed according to the mass percentage, including 60% of NiAl, 30% of Al, 1% of Pd, 4% of Ti and 5% of NH4Cl, which was placed in a planetary ball mill for wet grinding, wherein the wet grinding medium was anhydrous ethanol, the ball milling speed was 400 rpm, the time was 24 h, and the cladding powder was obtained after vacuum drying at 80℃ for 24 h.

[0081] Step 2, the surface of the workpiece to be plated was cleaned with a high-pressure water gun for 5 min, and then washed clean with alcohol or acetone.

[0082] Step 3, the workpiece to be plated was placed in an inert atmosphere of Ar, and the cladding powder was sprayed on the surface of the workpiece to be plated by using an ion cladding device to carry out plasma cladding, and an aluminide cladding coating with oxidation resistance was obtained after cooling. The plasma cladding process parameters were as follows: cladding current was 120 A, feeding rate was 20 g / min, scanning rate was 30 cm / min, nozzle height was 10 mm, rotation speed was 4 r / min, ion gas flow rate was 0.2 L / min, and protective gas flow rate was 19 L / min.

[0083] Step S4, after cladding, the surface residue of the workpiece was washed with a high-pressure water gun or a high-pressure gas flow, and then naturally air-dried.

[0084] Example 15

[0085] Step S1, each component of the solid phase component was weighed according to the mass percentage, including 65% of NiAl, 25% of Al, 4% of Pd, 4% of Ti and 2% of NH4Cl, which was placed in a planetary ball mill for wet grinding, wherein the wet grinding medium was anhydrous ethanol, the ball milling speed was 400 rpm, the time was 24 h, and the cladding powder was obtained after vacuum drying at 120℃ for 18 h.

[0086] Step 2, the surface of the workpiece to be plated was cleaned with a high-pressure water gun for 5 min, and then washed clean with alcohol or acetone.

[0087] Step 3, the workpiece to be plated was placed in an inert atmosphere of Ar or N2, and the cladding powder was sprayed on the surface of the workpiece to be plated by using an ion cladding device to carry out plasma cladding, and an aluminide cladding coating with oxidation resistance was obtained after cooling. The plasma cladding process parameters were as follows: cladding current was 90 A, feeding rate was 19 g / min, scanning rate was 38 cm / min, nozzle height was 10 mm, rotation speed was 4 r / min, ion gas flow rate was 0.2 L / min, and protective gas flow rate was 19 L / min.

[0088] Step S4, after cladding, the surface residue of the workpiece was washed with a high-pressure water gun or a high-pressure gas flow, and then naturally air-dried.

[0089] Embodiment 16

[0090] Step S1, each component of the solid phase component was weighed according to the mass percentage, including 75% of NiAl, 20% of Al, 1% of Pd, 2% of Ti and 2% of NH4Cl, which was placed in a planetary ball mill for wet grinding, wherein the wet grinding medium was anhydrous ethanol, the ball milling speed was 380 rpm, the time was 24 h, and the cladding powder was obtained after vacuum drying at 110℃ for 24 h.

[0091] Step 2, the surface of the workpiece to be plated was cleaned with a high-pressure water gun for 5 min, and then washed clean with alcohol or acetone.

[0092] Step 3, the workpiece to be plated was placed in an inert atmosphere of Ar, and the cladding powder was sprayed on the surface of the workpiece to be plated by using an ion cladding device to carry out plasma cladding, and an aluminide cladding coating with oxidation resistance was obtained after cooling. The plasma cladding process parameters were as follows: cladding current was 110 A, feeding rate was 21 g / min, scanning rate was 30 cm / min, nozzle height was 10 mm, rotation speed was 3 r / min, ion gas flow rate was 0.2 L / min, and protective gas flow rate was 19 L / min.

[0093] Step S4, after the cladding was completed, the surface residue of the workpiece was washed with a high-pressure water gun or a high-pressure gas flow, and then naturally air-dried.

[0094] In the embodiments of the present application, the modified method for improving the oxidation resistance of the aluminide cladding coating is suitable for austenitic steel and high-temperature alloy parts used in large-scale boilers, oil and gas pipeline transportation and other large-length-diameter-ratio and various complex-shaped workpieces. The aluminide cladding coating prepared by the modified method has not only strong practicability, high penetration rate and excellent film-substrate adhesion, but also excellent industrial batch production efficiency.

[0095] It can be understood that the above embodiments are only exemplary embodiments adopted for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also considered to be within the protection scope of the present application.

Claims

1. A modification method for improving the oxidation resistance of an aluminide overlay coating, characterized by, It comprises the following steps: Step S1, the solid phase components are stirred, ball milled, dried to prepare cladding powder according to the mass percentage of 50-80% NiAl, 10-40% Al, 1-5% Pd, 2-5% Ti and 2-5% NH4Cl; wherein the sum of the mass percentage of each solid phase component is 100%; Step S2, the surface of the workpiece to be plated is cleaned for standby, and a sufficient amount of cladding powder is poured into the feeding port of the ion cladding device; Step S3, the workpiece to be plated is placed in an inert atmosphere, and the ion cladding device is used to spray the cladding powder on the surface of the workpiece to be plated to carry out plasma cladding, and an aluminide cladding coating is obtained after cooling; Step S4, the cladding residue is treated; The process parameters of plasma cladding are as follows: The cladding current is 80-120A, the feeding rate is 18-22g / min, the scanning rate is 20-40cm / min, the nozzle height is 8-12mm, the rotation speed is 2-5r / min, the ion gas flow is 0.2-0.3L / min, and the protective gas flow is 18-20L / min.

2. The method of claim 1, wherein the aluminum aluminide coating is applied by a thermal spray process. In step S1, NiAl, Al, Pd and Ti are in powder form, and NiAl, Al, Pd and Ti are sieved through a 1000 mesh screen.

3. The method of claim 1, wherein the method is characterized in that, In step S1, the cladding powder is obtained by wet milling the solid phase components with a planetary ball mill and then drying.

4. The method of claim 3, wherein the aluminum aluminide coating is applied by a thermal spray process. When the solid phase components are wet milled in the planetary ball mill, the wet milling medium is anhydrous ethanol, the ball milling speed is 350-400rpm, the time is 12-24h, and the drying condition is vacuum drying at 80-120℃ for 12-24h.

5. The method of claim 1, wherein the modified aluminum aluminide overlay coating has an oxidation resistance performance. The inert gas in the inert atmosphere is Ar or N2.

6. The method of claim 1, wherein the aluminum aluminide coating is applied by a thermal spray process. In step S2, the surface of the workpiece to be plated is cleaned with a high-pressure water gun for 5min, and then washed clean with alcohol or acetone.

7. The method of claim 1, wherein the aluminum aluminide coating is applied by a thermal spray process. The cladding residue is treated, including: The cladding residue on the surface of the workpiece is washed with a high-pressure water gun and naturally air dried.

8. The method of claim 1, wherein the aluminum aluminide coating is applied by a thermal spray process. In step S3, the thickness of the aluminide cladding coating is 0.78-1.84mm.

9. The method of claim 1, wherein the aluminum aluminide coating is applied by a thermal spray process. The mass percentage of NiAl is 50%, the mass percentage of Al is 35%, the mass percentage of Pd is 5%, the mass percentage of Ti is 5%, and the mass percentage of NH4Cl is 5%.

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