Aluminum alloy surface ultrasonic cladding method and ultrasonic cladding device

Abstract

The present application relates to an ultrasonic cladding method and an ultrasonic cladding device for an aluminum alloy surface. The method comprises: performing an ultrasonic cladding operation on a region to be clad of an aluminum alloy part in a solder molten pool through an ultrasonic cladding process, so that a weldable coating is formed in the region to be clad; and performing an infiltration operation on the aluminum alloy part after the ultrasonic cladding process to optimize the weldable coating. The present application first forms a weldable coating on the region to be clad of the aluminum alloy part through ultrasonic cladding, and then performs an infiltration operation on the weldable coating, and uses the surface tension of the solder during the infiltration operation to close the pores at the edge of the weldable coating, thereby reducing the generation of pores and making the obtained weldable coating have excellent corrosion resistance.

Description

Technical Field

[0001] The present application relates to the field of welding auxiliary technology, and in particular to an aluminum alloy surface ultrasonic cladding method and an ultrasonic cladding device. Background Art

[0002] With the development of society and the advancement of science and technology, more and more parts are made of aluminum alloys. A variety of different aluminum alloy parts can be connected to each other to achieve different functions. However, since aluminum alloy is an active metal, there is a dense oxide film on its surface formed by instant oxidation. This oxide film makes it impossible to achieve reliable low-temperature brazing connection between aluminum alloy parts. The traditional solution is to electroplate the surface of aluminum alloy parts (for example: electroplating copper layer and tin layer in sequence) to form a weldable coating, and then weld it with other parts. However, the electroplating process has serious environmental pollution, complex procedures, high power consumption and high cost, which does not conform to the development direction of green, low-carbon and environmental protection.

[0003] In the related art, a technical solution of using ultrasonic cladding technology to form a solderable coating is proposed. However, in the process of forming the solderable coating, pores are easily generated at the edge of the solderable coating, causing pore corrosion and reducing the corrosion resistance of the solderable coating. Summary of the invention

[0004] Based on this, it is necessary to provide an ultrasonic cladding method and an ultrasonic cladding device for aluminum alloy surface that can improve the corrosion resistance of weldable coating in order to solve the above technical problems.

[0005] In a first aspect, the present application provides an aluminum alloy surface ultrasonic cladding method. The method comprises: performing an ultrasonic cladding operation on a to-be-clad area of ​​an aluminum alloy part in a solder molten pool through an ultrasonic cladding process to form a solderable coating on the to-be-clad area; and performing an infiltration operation on the aluminum alloy part after the ultrasonic cladding process to optimize the solderable coating.

[0006] In one of the embodiments, the solder molten pool is filled with a first solder, and the first solder is a zinc-containing material.

[0007] In one embodiment, the zinc-containing material includes at least one of zinc, zinc-aluminum alloy, zinc-magnesium alloy, zinc-copper alloy, tin-zinc alloy, tin-zinc-copper alloy, tin-zinc-silver alloy, and tin-zinc-silver-copper alloy.

[0008] In one of the embodiments, the ultrasonic cladding process is performed on the area to be clad of the aluminum alloy part in a solder molten pool to form a solderable coating in the area to be clad, including the steps of: setting a cladding temperature of the ultrasonic cladding process; wherein the cladding temperature is greater than a first preset temperature of the solder liquidus temperature, and the first preset temperature is 10 degrees Celsius to 200 degrees Celsius.

[0009] In one of the embodiments, the ultrasonic cladding process is performed on the area to be clad of the aluminum alloy part in a solder molten pool to form a weldable coating in the area to be clad, including the steps of: setting ultrasonic parameters of the ultrasonic cladding process, the ultrasonic parameters including ultrasonic frequency, ultrasonic power and ultrasonic time; wherein the ultrasonic frequency is 20 kHz to 80 kHz, the ultrasonic power is 60 watts to 1000 watts, and the ultrasonic time is 0.1 second to 100 seconds.

[0010] In one embodiment, the infiltration operation on the aluminum alloy part after the ultrasonic cladding process comprises the steps of:

[0011] The infiltration operation is performed on the aluminum alloy part that has undergone the ultrasonic cladding process in an infiltration tank equipped with a second solder; wherein the second solder is a tin-containing material.

[0012] In one embodiment, the tin-containing material includes at least one of tin, tin-copper alloy, tin-silver alloy, tin-silver-copper alloy, tin-gold alloy, tin-bismuth alloy, tin-bismuth-copper alloy, and tin-lead alloy.

[0013] In one embodiment, the wetting operation of the aluminum alloy part that has undergone the ultrasonic cladding process in a wetting pool equipped with a second solder includes the steps of: setting the temperature of the wetting operation, the temperature of the wetting operation being greater than a second preset temperature of the liquidus temperature of the second solder in the wetting pool; wherein the second preset temperature is 30 degrees Celsius to 200 degrees Celsius.

[0014] In one of the embodiments, the infiltration operation on the aluminum alloy part that has undergone the ultrasonic cladding process includes the steps of: immersing the weldable coating in an infiltration tank and then taking out the aluminum alloy part; rotating the weldable coating by a preset angle and then immersing it in the infiltration tank again until the number of infiltration operations reaches a preset number.

[0015] In one embodiment, the aluminum alloy part is a radiation unit or a phase shifter.

[0016] In one of the embodiments, before the step of performing ultrasonic cladding operation on the area to be clad of the aluminum alloy part in the solder molten pool through an ultrasonic cladding process to form a solderable coating on the area to be clad, the method also includes: cleaning the aluminum alloy part; and drying and heating the cleaned aluminum alloy part.

[0017] In one embodiment, the step of drying and heating the cleaned aluminum alloy part comprises: placing the cleaned aluminum alloy part in a drying and heating furnace and heating it for 5 seconds to 100 seconds.

[0018] In one of the embodiments, after the step of performing a wetting operation on the aluminum alloy part that has undergone the ultrasonic cladding process, the method further comprises: cleaning the weldable coating by high-pressure hot air.

[0019] In one embodiment, the cleaning of the weldable coating by high-pressure hot air comprises the steps of: setting the cleaning parameters of the high-pressure hot air, the cleaning parameters comprising: blowing temperature, blowing pressure and blowing time; wherein the blowing temperature is 20 degrees Celsius to 500 degrees Celsius, the blowing pressure is 5 liters per minute to 100 liters per minute, and the blowing time is 0.1 seconds to 100 seconds.

[0020] In a second aspect, the present application also provides an aluminum alloy surface ultrasonic cladding device. The device comprises: an ultrasonic cladding device, which is used to perform an ultrasonic cladding operation on a to-be-clad area of ​​an aluminum alloy part in a solder molten pool through an ultrasonic cladding process, so that a solderable coating is formed in the to-be-clad area; and an infiltration treatment device, which is used to perform an infiltration operation on the aluminum alloy part that has undergone the ultrasonic cladding process, so as to optimize the solderable coating.

[0021] The above-mentioned aluminum alloy surface ultrasonic cladding method and ultrasonic cladding device first form a solderable coating on the to-be-clad area of ​​the aluminum alloy part through ultrasonic cladding, and then perform an infiltration operation on the solderable coating, and use the surface tension of the solder during the infiltration operation to close the pores at the edge of the solderable coating, thereby reducing the generation of pores and making the obtained solderable coating have excellent corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of a process of ultrasonic cladding method for aluminum alloy surface in one embodiment;

[0023] FIG2 is a schematic diagram of a flow chart of an infiltration operation in one embodiment;

[0024] FIG3 is a schematic diagram of a process of ultrasonic cladding method for aluminum alloy surface in another embodiment;

[0025] FIG4 is a schematic diagram of a process of ultrasonic cladding method for aluminum alloy surface in another embodiment;

[0026] FIG5 is a topographical diagram of the interface between the aluminum alloy vibrator and the solderable coating in one embodiment;

[0027] FIG6 is a topographical diagram of the interface between the aluminum alloy vibrator and the solderable coating in another embodiment;

[0028] FIG. 7 is a module diagram of an aluminum alloy surface ultrasonic cladding device in one embodiment. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] As described in the background technology, the ultrasonic cladding technology in the prior art has the problem that the corrosion resistance of the solderable coating is not strong. Research has found that the reason for this problem is that the ultrasonic cladding technology uses the ultrasonic cavitation effect to achieve direct cladding of the solder liquid on the surface of the aluminum alloy part. However, the electrode potential difference between the aluminum alloy and the solder (tin-based solder) is large, and the interface interaction effect is weak, so the formed solderable coating has poor salt spray corrosion resistance. In addition, the cavitation effect is weak in the area of ​​the solder wetting front, and it is easy to produce pores at the edge of the solderable coating, causing pore corrosion, which further reduces the corrosion resistance of the solderable coating.

[0031] Based on the above reasons, the present application provides an aluminum alloy surface ultrasonic cladding method and an ultrasonic cladding device, which can reduce the generation of pores at the edge of the weldable coating and make the obtained weldable coating have excellent corrosion resistance.

[0032] The ultrasonic cladding method for aluminum alloy surface provided in the embodiment of the present application can be applied to an ultrasonic cladding device. The ultrasonic cladding device has functions such as cleaning, drying and heating, ultrasonic cladding, infiltration and high-pressure hot air. The controller of the ultrasonic cladding device can implement the ultrasonic cladding method for aluminum alloy surface of the present application by executing corresponding control instructions.

[0033] In one embodiment, as shown in FIG. 1 , a method for ultrasonic cladding of an aluminum alloy surface is provided, and the method is described by taking the application of the method to an ultrasonic cladding device as an example, comprising the following steps:

[0034] Step S110, performing ultrasonic cladding operation on the to-be-clad area of ​​the aluminum alloy part in a solder molten pool through an ultrasonic cladding process, so as to form a solderable coating on the to-be-clad area.

[0035] Specifically, when ultrasonic cladding is performed on an aluminum alloy part, the aluminum alloy part is first placed in a solder pool, in which there is molten solder, and the area to be clad of the aluminum alloy part is immersed in the solder. Then, ultrasonic vibration is applied to the aluminum alloy part to make the solder clad on the area to be clad of the aluminum alloy part. After the ultrasonic cladding is completed, the aluminum alloy part is taken out of the solder pool, and a solderable coating can be formed in the area to be clad. In some embodiments, a first solder is installed in the solder pool, and the first solder is a zinc-containing material. Due to the strong interaction between zinc atoms and aluminum atoms and the large mutual solubility, a continuous zinc-aluminum alloy solid solution can be formed at the cladding interface, thereby enhancing the interface bonding force and reducing the initiation of pores. In some embodiments, the zinc-containing material includes at least one of: zinc, zinc-aluminum alloy, zinc-magnesium alloy, zinc-copper alloy, tin-zinc alloy, tin-zinc-copper alloy, tin-zinc-silver alloy, and tin-zinc-silver-copper alloy.

[0036] Step S120, performing a wetting operation on the aluminum alloy part that has undergone the ultrasonic cladding process to optimize the weldable coating.

[0037] Specifically, after a solderable coating is formed in the cladding area on the surface of the aluminum alloy part, the aluminum alloy part is placed in an infiltration pool for infiltration operation. There is a molten solder in the infiltration pool. The solder can infiltrate into the edge pores of the solderable coating to close the edge pores, thereby improving the corrosion resistance of the solderable coating. It is understandable that the solder used in the ultrasonic cladding operation and the infiltration operation can be the same or different, and it can be selected according to specific usage requirements. In some embodiments, an infiltration operation is performed on an aluminum alloy part that has undergone an ultrasonic cladding process in an infiltration pool equipped with a second solder; wherein the second solder is a tin-containing material. In some embodiments, the tin-containing material includes at least one of tin, tin-copper alloy, tin-silver alloy, tin-silver-copper alloy, tin-gold alloy, tin-bismuth alloy, tin-bismuth-copper alloy, and tin-lead alloy. By setting the second solder to a tin-containing material, a solder layer will be added to the surface of the solderable coating to improve its solderability.

[0038] The above-mentioned aluminum alloy surface ultrasonic cladding method first forms a solderable coating on the to-be-clad area of ​​the aluminum alloy part through ultrasonic cladding, and then performs an infiltration operation on the solderable coating. The surface tension of the solder during the infiltration operation is used to close the pores at the edge of the solderable coating, thereby reducing the generation of pores and making the obtained solderable coating have excellent corrosion resistance.

[0039] In one embodiment, in step S110, an ultrasonic cladding operation is performed on the to-be-clad area of ​​the aluminum alloy part in a solder molten pool by an ultrasonic cladding process to form a solderable coating on the to-be-clad area, including the steps of: setting a cladding temperature of the ultrasonic cladding process; wherein the cladding temperature is greater than a first preset temperature of the solder liquidus temperature, and the first preset temperature is 10 degrees Celsius to 200 degrees Celsius. Specifically, when the ultrasonic cladding operation is performed on the aluminum alloy part, the cladding temperature of the ultrasonic cladding process is first set in the ultrasonic cladding device through the user operation interface, and the cladding temperature needs to be greater than the solder liquidus temperature to ensure that the solder in the solder molten pool is completely liquefied during ultrasonic cladding.

[0040] In one embodiment, in step S110, an ultrasonic cladding operation is performed on the to-be-clad area of ​​the aluminum alloy part in the solder molten pool through an ultrasonic cladding process to form a solderable coating in the to-be-clad area, including the steps of: setting ultrasonic parameters of the ultrasonic cladding process, the ultrasonic parameters including ultrasonic frequency, ultrasonic power and ultrasonic time; wherein the ultrasonic frequency is 20 kHz to 80 kHz, the ultrasonic power is 60 watts to 1000 watts, and the ultrasonic time is 0.1 second to 100 seconds. Specifically, when performing ultrasonic cladding operation on the aluminum alloy part, it is necessary to set the ultrasonic parameters in the ultrasonic cladding device through the user operation interface to be suitable for different aluminum alloy parts.

[0041] In one embodiment, an aluminum alloy part that has undergone an ultrasonic cladding process is infiltrated in an infiltration tank equipped with a second solder, comprising the steps of: setting a temperature for the infiltration operation, the temperature for the infiltration operation being greater than a second preset temperature of the liquidus temperature of the second solder in the infiltration tank; wherein the second preset temperature is 30 degrees Celsius to 200 degrees Celsius. Specifically, when the aluminum alloy part is infiltrated, the temperature for the infiltration operation is first set in the ultrasonic cladding device through a user operation interface, and the temperature for the infiltration operation needs to be greater than the liquidus temperature of the second solder to ensure that the second solder in the infiltration tank is completely liquefied during the infiltration operation.

[0042] In one embodiment, as shown in FIG. 2 , in step S120, the aluminum alloy part that has undergone the ultrasonic cladding process is subjected to an infiltration operation, including the steps of:

[0043] Step S121, immersing the weldable coating in an immersion tank and then taking out the aluminum alloy part;

[0044] Step S122, rotating the solderable coating by a preset angle and then immersing it in the immersion tank again until the number of immersion operations reaches a preset number.

[0045] Specifically, in this embodiment, when the solderable coating is infiltrated, the solderable coating needs to be infiltrated multiple times to achieve a better infiltration effect. The ultrasonic cladding device first immerses the solderable coating on the aluminum alloy part in the infiltration tank for a certain period of time, and then takes the aluminum alloy part out of the infiltration tank, thereby completing a single infiltration. Then, after the solderable coating is rotated by a preset angle (for example, 45 degrees to 90 degrees), it is immersed in the infiltration tank again, and the above steps are repeated until the number of infiltration operations of the solderable coating reaches the preset number. In some embodiments, when the preset angle is set to 45 degrees, the preset number is set to 8 times, so that the solderable coating completes all infiltration operations when it rotates one circle.

[0046] In one embodiment, the aluminum alloy part is a radiation unit or a phase shifter, and may also be other aluminum alloy parts that need to be welded.

[0047] In one embodiment, as shown in FIG. 3 , in step S110, before the step of performing an ultrasonic cladding operation on the to-be-clad area of ​​the aluminum alloy part in the solder molten pool by an ultrasonic cladding process to form a solderable coating on the to-be-clad area, the aluminum alloy surface ultrasonic cladding method further includes:

[0048] Step S130, cleaning the aluminum alloy part.

[0049] Specifically, in this embodiment, when preparing the weldable coating, the ultrasonic cladding device first cleans the aluminum alloy part. When cleaning the aluminum alloy part, it is necessary to remove the oxide film and oil stains on the surface of the area to be clad of the aluminum alloy part to prevent the oxide film and oil stains from affecting the subsequent process steps. When cleaning the aluminum alloy part, chemical cleaning and / or mechanical cleaning can be used. For example, the surface of the aluminum alloy part is degreased using an organic solvent, the surface oxide layer is removed using an alkaline solution or an acidic solution, the surface oxide layer is removed by mechanical grinding, and the surface of the aluminum alloy part is cleaned ultrasonically.

[0050] Step S140, drying and heating the cleaned aluminum alloy part.

[0051] Specifically, after the ultrasonic cladding device cleans the aluminum alloy part, the aluminum alloy part needs to be dried and heated to ensure that the surface of the aluminum alloy is dry and to prevent water vapor evaporation, coating cracking, blistering or peeling in subsequent processes. Drying and heating can be performed in a variety of ways, for example, by hot air. In some embodiments, the ultrasonic cladding device moves the aluminum alloy part to a drying and heating furnace for drying and heating. In some embodiments, the cleaned aluminum alloy part is placed in a drying and heating furnace and heated for 5 to 100 seconds.

[0052] In one embodiment, as shown in FIG. 4 , in step S120, after the step of performing an infiltration operation on the aluminum alloy part that has undergone the ultrasonic cladding process, the aluminum alloy surface ultrasonic cladding method further includes:

[0053] Step S150, cleaning the solderable coating by high-pressure hot air.

[0054] Specifically, after the ultrasonic cladding device performs the wetting operation on the solderable coating, the excess solder on the surface of the cladding area is cleaned by high-pressure hot air to obtain the final solderable coating. In some embodiments, the cleaning gas in the high-pressure hot air can be an inert gas.

[0055] In one embodiment, in step S150, the solderable coating is cleaned by high-pressure hot air, including the steps of: setting the cleaning parameters of the high-pressure hot air, the cleaning parameters including: blowing temperature, blowing pressure and blowing time; wherein the blowing temperature is 20 degrees Celsius to 500 degrees Celsius, the blowing pressure is 5 liters per minute to 100 liters per minute, and the blowing time is 0.1 seconds to 100 seconds. Specifically, when the aluminum alloy parts are cleaned by high-pressure hot air, the cleaning parameters of the high-pressure hot air are first set in the ultrasonic cladding device through the user operation interface, and the cleaning of different solders can be completed by setting the blowing temperature, blowing pressure and blowing time.

[0056] The advantages of the ultrasonic cladding method for the surface of aluminum alloy of the present application are described in detail below. In the related art, tin liquid is directly clad on the surface of aluminum alloy parts by ultrasonic cladding to form a solderable coating. For a specific example, the aluminum alloy part is an aluminum alloy vibrator. First, the aluminum alloy vibrator is ultrasonically cleaned, and then the cleaned aluminum alloy vibrator is dried and heated. Then ultrasonic cladding is performed. During ultrasonic cladding, the solder in the solder pool is Sn-0.7Cu solder, and the temperature of the solder pool is stabilized at 300 degrees Celsius. Then the ultrasonic welding rod is placed on the upper part of the aluminum alloy vibrator. The ultrasonic frequency is 20 kHz, the ultrasonic time is 10 seconds, and the ultrasonic power is 110 watts. After the ultrasonic cladding is completed, the aluminum alloy vibrator is taken out from the solder pool, and finally the high-pressure hot air is used to blow and clean the area to be clad. The blowing pressure is 40 liters per minute and the blowing time is 3 seconds. At this time, the material of the solderable coating formed on the aluminum alloy vibrator is a tin-copper alloy. As shown in Figure 5, this is the morphology of the interface between the aluminum alloy vibrator and the Sn-0.7Cu layer after the above treatment. It can be seen from the figure that there is a gap between the edge of the solderable coating and the interface of the aluminum alloy vibrator. After the neutral salt spray test on the aluminum alloy vibrator, the aluminum alloy vibrator undergoes porosity corrosion, and the corrosion cracks extend laterally along the interface until peeling off. The service life of the aluminum alloy vibrator in the neutral salt spray environment is 48 hours.

[0057] In the aluminum alloy surface ultrasonic cladding method disclosed in the present application, a solderable coating is first formed on the to-be-clad area of ​​the aluminum alloy surface by ultrasonic cladding, and then the solderable coating is immersed in an infiltration pool for infiltration operation, thereby obtaining a solderable coating. In a specific example, the aluminum alloy part is an aluminum alloy vibrator. The aluminum alloy vibrator is first ultrasonically cleaned, and then the cleaned aluminum alloy vibrator is dried and heated. Then ultrasonic cladding is performed. During ultrasonic cladding, the solder in the solder pool is Sn-9Zn solder, and the temperature of the solder pool is stabilized at 330 degrees Celsius. Then, an ultrasonic welding rod is placed on the upper part of the aluminum alloy vibrator, the ultrasonic frequency is 20 kHz, the ultrasonic time is 10 seconds, and the ultrasonic power is 120 watts. After the ultrasonic cladding is completed, a solderable coating can be formed on the aluminum alloy vibrator, and the material of the solderable coating is tin-zinc alloy. The solder in the wetting pool is Sn-3Ag-0.5Cu solder, and the temperature of the wetting pool is set to 370 degrees Celsius. In order to completely immerse the solderable coating, the solder liquid level of the wetting pool is higher than the solder liquid level of the solder molten pool. The number of wetting is set to 3 times, and the aluminum alloy vibrator needs to be rotated 90 degrees horizontally after a single wetting to better eliminate the pores. After the infiltration is completed, the aluminum alloy vibrator is taken out of the infiltration pool, and finally the area to be clad is blown and cleaned with high-pressure hot air. The blowing pressure is 40 liters per minute and the blowing time is 2 seconds. At this time, the material of the solderable coating formed on the aluminum alloy vibrator is tin-silver-copper alloy. As shown in Figure 6, it is a morphology of the interface between the aluminum alloy vibrator and the solderable coating after the above treatment. The edge position of the solderable coating is well combined with the aluminum alloy vibrator, and the pores are effectively eliminated. In addition, the Sn-Zn layer and the Sn-Ag-Cu layer are fully mixed, and no stratification occurs. During the ultrasonic cladding process, the solderable coating was preferentially clad on the surface of the aluminum alloy vibrator, and an Al-Zn-Sn solid solution was formed at the interface. Due to the addition of Zn atoms, the potential difference between the Sn-based solder and the Al substrate was reduced, slowing down the corrosion of the aluminum alloy vibrator. Finally, Sn-Ag-Cu solder with better low-temperature welding performance was selected for infiltration treatment, which suppressed the occurrence of pore corrosion from the source and improved the low-temperature welding performance of the solderable coating. The aluminum alloy vibrator of this embodiment has good intermodulation indicators, and its service life in a neutral salt spray environment exceeds 96 hours, and its adhesion meets the requirements of the use indicators.

[0058] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0059] Based on the same inventive concept, the embodiment of the present application also provides an aluminum alloy surface ultrasonic cladding device for implementing the aluminum alloy surface ultrasonic cladding method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more aluminum alloy surface ultrasonic cladding device embodiments provided below can refer to the limitations of the aluminum alloy surface ultrasonic cladding method above, and will not be repeated here.

[0060] In one embodiment, as shown in FIG. 7 , an aluminum alloy surface ultrasonic cladding device is provided, comprising: an ultrasonic cladding device 210 and an infiltration treatment device 220 , wherein:

[0061] Ultrasonic cladding equipment 210, used to perform ultrasonic cladding operation on the to-be-clad area of ​​the aluminum alloy part in the solder molten pool through an ultrasonic cladding process, so that a weldable coating is formed in the to-be-clad area;

[0062] The infiltration treatment equipment 220 is used to perform infiltration operation on the aluminum alloy parts that have undergone the ultrasonic cladding process to optimize the weldable coating.

[0063] In one embodiment, a first solder is contained in the solder pool, and the first solder is a zinc-containing material.

[0064] In one embodiment, the zinc-containing material includes at least one of zinc, zinc-aluminum alloy, zinc-magnesium alloy, zinc-copper alloy, tin-zinc alloy, tin-zinc-copper alloy, tin-zinc-silver alloy, and tin-zinc-silver-copper alloy.

[0065] In one embodiment, the ultrasonic cladding equipment 210 is also used to set the cladding temperature of the ultrasonic cladding process; wherein the cladding temperature is greater than a first preset temperature of the solder liquidus temperature, and the first preset temperature is 10 degrees Celsius to 200 degrees Celsius.

[0066] In one embodiment, the ultrasonic cladding equipment 210 is also used to set the ultrasonic parameters of the ultrasonic cladding process, and the ultrasonic parameters include ultrasonic frequency, ultrasonic power and ultrasonic time; wherein the ultrasonic frequency is 20 kHz to 80 kHz, the ultrasonic power is 60 watts to 1000 watts, and the ultrasonic time is 0.1 second to 100 seconds.

[0067] In one embodiment, the infiltration treatment equipment 220 is also used to perform an infiltration operation on the aluminum alloy part that has undergone the ultrasonic cladding process in an infiltration tank equipped with a second solder; wherein the second solder is a tin-containing material.

[0068] In one embodiment, the tin-containing material includes at least one of tin, tin-copper alloy, tin-silver alloy, tin-silver-copper alloy, tin-gold alloy, tin-bismuth alloy, tin-bismuth-copper alloy, and tin-lead alloy.

[0069] In one embodiment, the immersion treatment equipment 220 is also used to set the temperature of the immersion operation, and the temperature of the immersion operation is greater than the second preset temperature of the liquidus temperature of the second solder in the immersion pool; wherein the second preset temperature is 30 degrees Celsius to 200 degrees Celsius.

[0070] In one embodiment, the infiltration treatment equipment 220 is also used to immerse the weldable coating in the infiltration tank and then take out the aluminum alloy part; rotate the weldable coating by a preset angle and then immerse it in the infiltration tank again until the number of infiltration operations reaches a preset number.

[0071] In one embodiment, the aluminum alloy member is a radiation element or a phase shifter.

[0072] In one embodiment, the aluminum alloy surface ultrasonic cladding device further includes: a cleaning device for cleaning the aluminum alloy part; and a drying device for drying and heating the cleaned aluminum alloy part.

[0073] In one embodiment, the drying equipment is also used to place the cleaned aluminum alloy parts in a drying heating furnace and heat them for 5 seconds to 100 seconds.

[0074] In one embodiment, the aluminum alloy surface ultrasonic cladding device further includes: a cleaning device for cleaning the weldable coating by high-pressure hot air.

[0075] In one embodiment, the cleaning equipment is also used to set the cleaning parameters of high-pressure hot air, and the cleaning parameters include: blowing temperature, blowing pressure and blowing time; wherein, the blowing temperature is 20 degrees Celsius to 500 degrees Celsius, the blowing pressure is 5 liters per minute to 100 liters per minute, and the blowing time is 0.1 seconds to 100 seconds.

[0076] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for ultrasonic cladding of aluminum alloy surface, characterized in that: The method comprises: Performing ultrasonic cladding operation on the to-be-clad area of ​​the aluminum alloy part in a solder molten pool by an ultrasonic cladding process, so that a weldable coating is formed on the to-be-clad area; The aluminum alloy part that has undergone the ultrasonic cladding process is subjected to an infiltration operation in an infiltration tank equipped with a second solder; wherein the second solder is a tin-containing material.

2. The aluminum alloy surface ultrasonic cladding method according to claim 1, characterized in that: The solder molten pool is provided with a first solder, which is a zinc-containing material.

3. The method for ultrasonic cladding on the surface of aluminum alloy according to claim 2, characterized in that: The zinc-containing material includes at least one of zinc, zinc-aluminum alloy, zinc-magnesium alloy, zinc-copper alloy, tin-zinc alloy, tin-zinc-copper alloy, tin-zinc-silver alloy, and tin-zinc-silver-copper alloy.

4. The aluminum alloy surface ultrasonic cladding method according to claim 1, characterized in that: The ultrasonic cladding process is used to perform ultrasonic cladding operation on the to-be-clad area of ​​the aluminum alloy part in a solder molten pool so as to form a weldable coating on the to-be-clad area, comprising the steps of: The cladding temperature of the ultrasonic cladding process is set; wherein the cladding temperature is greater than a first preset temperature of the solder liquidus temperature, and the first preset temperature is 10 degrees Celsius to 200 degrees Celsius.

5. The aluminum alloy surface ultrasonic cladding method according to claim 1, characterized in that: The ultrasonic cladding process is used to perform ultrasonic cladding operation on the to-be-clad area of ​​the aluminum alloy part in a solder molten pool so as to form a weldable coating on the to-be-clad area, comprising the steps of: The ultrasonic parameters of the ultrasonic cladding process are set, and the ultrasonic parameters include ultrasonic frequency, ultrasonic power and ultrasonic time; wherein the ultrasonic frequency is 20 kHz to 80 kHz, the ultrasonic power is 60 watts to 1000 watts, and the ultrasonic time is 0.1 second to 100 seconds.

6. The aluminum alloy surface ultrasonic cladding method according to claim 1, characterized in that: The tin-containing material includes at least one of tin, tin-copper alloy, tin-silver alloy, tin-silver-copper alloy, tin-gold alloy, tin-bismuth alloy, tin-bismuth-copper alloy, and tin-lead alloy.

7. The aluminum alloy surface ultrasonic cladding method according to claim 1, characterized in that: The step of performing the wetting operation on the aluminum alloy part that has undergone the ultrasonic cladding process in a wetting pool equipped with a second solder comprises the following steps: The temperature of the wetting operation is set, and the temperature of the wetting operation is greater than a second preset temperature of the liquidus temperature of the second solder in the wetting pool; wherein the second preset temperature is 30 degrees Celsius to 200 degrees Celsius.

8. The aluminum alloy surface ultrasonic cladding method according to claim 1, characterized in that: The infiltration operation of the aluminum alloy part subjected to the ultrasonic cladding process comprises the following steps: After immersing the weldable coating in an infiltration tank, the aluminum alloy part is taken out; The solderable coating is rotated by a preset angle and then immersed in the wetting tank again until the number of wetting operations reaches a preset number.

9. The aluminum alloy surface ultrasonic cladding method according to claim 1, characterized in that: The aluminum alloy part is a radiation unit or a phase shifter.

10. The method for ultrasonic cladding on the surface of aluminum alloy according to any one of claims 1 to 9, characterized in that: Before the step of performing ultrasonic cladding operation on the to-be-clad area of ​​the aluminum alloy part in the solder molten pool by an ultrasonic cladding process to form a weldable coating on the to-be-clad area, the method further comprises: Cleaning the aluminum alloy part; The cleaned aluminum alloy part is dried and heated.

11. The aluminum alloy surface ultrasonic cladding method according to claim 10, characterized in that: The step of drying and heating the cleaned aluminum alloy part comprises: The cleaned aluminum alloy part is placed in a drying heating furnace and heated for 5 seconds to 100 seconds.

12. The method for ultrasonic cladding on the surface of aluminum alloy according to any one of claims 1 to 9, characterized in that: After the step of performing an infiltration operation on the aluminum alloy part that has undergone the ultrasonic cladding process, the method further comprises: The solderable coating is cleaned by high pressure hot air.

13. The method for ultrasonic cladding on the surface of aluminum alloy according to claim 12, characterized in that: The method of cleaning the solderable coating by high pressure hot air comprises the following steps: The cleaning parameters of the high-pressure hot air are set, and the cleaning parameters include: blowing temperature, blowing pressure and blowing time; wherein the blowing temperature is 20 degrees Celsius to 500 degrees Celsius, the blowing pressure is 5 liters per minute to 100 liters per minute, and the blowing time is 0.1 seconds to 100 seconds.

14. An ultrasonic cladding device for aluminum alloy surface, characterized in that: The device comprises: Ultrasonic cladding equipment, used for performing ultrasonic cladding operation on the to-be-clad area of ​​the aluminum alloy part in the solder molten pool through an ultrasonic cladding process, so that a weldable coating is formed on the to-be-clad area; The infiltration treatment equipment is used to perform an infiltration operation on the aluminum alloy part that has undergone the ultrasonic cladding process in an infiltration tank equipped with a second solder; wherein the second solder is a tin-containing material.

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