Amorphous alloy material surface treatment method, amorphous alloy material, and electronic device

Abstract

The application discloses a kind of amorphous alloy material surface treatment method, amorphous alloy material and electronic equipment, it is related to amorphous alloy material technical field, the amorphous alloy material surface treatment method includes the following steps: obtaining to be treated amorphous alloy base material and amorphous alloy powder, wherein, the surface of the to be treated amorphous alloy base material has pore, the component of the amorphous alloy powder is identical with the component of the to be treated amorphous alloy base material;Using quenching and rapid heating process, the amorphous alloy powder is filled in the pore in the surface of the to be treated amorphous alloy base material after melting, and make the amorphous alloy in molten state rapidly cool, obtain amorphous alloy material, wherein, the heating rate of the amorphous alloy powder is greater than or equal to 10 6 K / s, the cooling rate of the amorphous alloy in molten state is greater than or equal to 3000 ℃ / ms.The application solves the technical problem that there is color difference phenomenon after welding the pores on the surface of amorphous alloy by laser welding in the related art.

Description

Technical Field

[0001] This application relates to the field of amorphous alloy materials technology, and in particular to a surface treatment method for amorphous alloy materials, amorphous alloy materials, and electronic devices. Background Technology

[0002] Amorphous alloys, also known as metallic glasses, possess a metastable structure characterized by long-range disorder and short-range order. Compared to traditional crystalline alloys, amorphous alloys exhibit superior properties such as high hardness, high strength, high corrosion resistance, high wear resistance, and magnetic properties, making them well-suited for applications in the casings and structural components of electronic products, such as the mid-frames or outer shells of electronic products, hinges of foldable screen electronic products, and hinges of TWS earphone charging cases. Currently, the main forming method for amorphous alloys is die casting, which inevitably leads to porosity defects inside and on the surface of the product. This is especially problematic when used as exterior components for smart wearable products, where amorphous alloys undergo mirror polishing and PVD (Physical Vapor Deposition) finishing processes. The porosity on the surface of amorphous alloys caused by die casting severely affects polishing and subsequent PVD film deposition, resulting in a large number of defective products.

[0003] Currently, laser welding can be used to fill pores. However, the high energy of laser welding causes severe internal heat effects on the die-cast pores, leading to crystallization of the amorphous alloy in and around the weld hole. As a result, after polishing and PVD treatment, the crystalline and amorphous parts of the alloy material exhibit severe color differences due to the difference in material grain structure, resulting in poor appearance. Summary of the Invention

[0004] The main objective of this application is to provide a surface treatment method for amorphous alloy materials, amorphous alloy materials, and electronic devices, aiming to solve the technical problem of discoloration after repairing pores on the surface of amorphous alloys by laser welding in related technologies.

[0005] To achieve the above objectives, this application provides a surface treatment method for amorphous alloy materials, the surface treatment method for amorphous alloy materials comprising the following steps:

[0006] A non-amorphous alloy substrate and amorphous alloy powder are obtained, wherein the surface of the non-amorphous alloy substrate has pores, and the composition of the amorphous alloy powder is the same as that of the non-amorphous alloy substrate.

[0007] The amorphous alloy powder is melted using a rapid heating and cooling process and then filled into the pores on the surface of the amorphous alloy substrate to be treated. The molten amorphous alloy is then rapidly cooled to obtain the amorphous alloy material. The heating rate of the amorphous alloy powder is greater than or equal to 10... 6K / s, wherein the cooling rate of the molten amorphous alloy is greater than or equal to 3000 °C / ms.

[0008] Optionally, the amorphous ratio of the amorphous alloy material is greater than or equal to 95%;

[0009] And / or, the holding time of the molten amorphous alloy in the crystallization temperature range is less than or equal to 70 ms.

[0010] Optionally, the rapid cooling and heating process includes at least one of supersonic plasma spraying, supersonic flame spraying, and arc welding.

[0011] Optionally, the pore size is 0.02-0.5 mm;

[0012] And / or, the particle size of the amorphous alloy powder is 10-100 μm.

[0013] Optionally, the particle size of the amorphous alloy powder is 10-100 μm.

[0014] Optionally, the amorphous alloy substrate to be processed includes at least one of zirconium-based amorphous alloy, cobalt-based amorphous alloy, iron-based amorphous alloy, magnesium-based amorphous alloy, copper-based amorphous alloy, and titanium-based amorphous alloy.

[0015] Optionally, the zirconium-based amorphous alloy comprises the following components by mass fraction:

[0016] Zr: 50-80%; Ti: 0.1-10%; Cu: 8%-30%; Ni: 3-15%; Al: 1-10%; Y: 0.1-3%; Fe: 0.5%-3%; Total Hf and other elements: ≤8%.

[0017] Optionally, the method for preparing the amorphous alloy powder includes the following steps:

[0018] Metal raw material powder is prepared and mixed according to a preset atomic ratio to obtain raw material powder mixture;

[0019] The raw material powder is ball-milled to obtain amorphous alloy powder. The ball milling is carried out under an inert atmosphere, and the process parameters of the ball milling include: using corundum balls, a ball milling speed of 500-1000 r / min, a ball-to-powder mass ratio of 30:1, and a ball milling time of 24-72 h.

[0020] This application also provides an amorphous alloy material, which is obtained by performing a surface pore sealing treatment using the amorphous alloy material surface treatment method described above.

[0021] This application also provides an electronic device comprising the amorphous alloy material described above.

[0022] This application provides a surface treatment method for amorphous alloy materials, an amorphous alloy material, and an electronic device. The surface treatment method for amorphous alloy materials includes the following steps: obtaining an amorphous alloy substrate to be treated and amorphous alloy powder, wherein the surface of the amorphous alloy substrate to be treated has pores, and the composition of the amorphous alloy powder is the same as that of the amorphous alloy substrate to be treated; melting the amorphous alloy powder using a rapid heating and cooling process, filling the pores on the surface of the amorphous alloy substrate to be treated, and rapidly cooling the molten amorphous alloy to obtain the amorphous alloy material, wherein the heating rate of the amorphous alloy powder is greater than or equal to 10. 6 K / s, wherein the cooling rate of the molten amorphous alloy is greater than or equal to 3000℃ / ms. First, by selecting amorphous alloy powder with the same composition as the amorphous alloy substrate to be treated for porosity repair, since both have similar high-temperature properties, the heat-affected zone generated during welding is smaller, which can effectively reduce crystallization in the heat-affected zone around the porosity of the amorphous alloy substrate, thereby reducing discoloration. Second, through a rapid cooling and heating process, the amorphous alloy powder can be cooled at a temperature higher than 10 K / s. 6 The heating rate of K / s rapidly heats the amorphous alloy to above the melting temperature, ensuring that the non-alloy powder is fully melted. Then, the molten amorphous alloy is filled into the pores. After filling the pores, the molten amorphous alloy is rapidly cooled to below the glass transition temperature at a cooling rate of over 3000℃ / ms. This shortens the time that the molten zone is in the crystallization temperature range and reduces the heat accumulation in the heat-affected zone, thereby shortening the time that the temperature of the heat-affected zone is in the crystallization temperature range. Therefore, it can reduce the crystallization of the molten zone in the pores and the heat-affected zone around the pores. Therefore, this invention overcomes the technical defects of high laser welding energy, which leads to severe internal heat effects in die casting pores, causing crystallization of the amorphous alloy in the weld hole and a certain area around the weld hole. This results in severe discoloration and poor appearance of the crystalline and amorphous parts of the alloy material after polishing and PVD treatment due to differences in material grain structure. This invention can effectively avoid crystallization of amorphous alloys during the pore sealing process. The amorphous rate of the amorphous alloy material obtained after pore sealing treatment using the surface treatment method of amorphous alloy material provided by this invention can reach more than 95%, and no discoloration phenomenon is observed. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic flowchart of an embodiment of the surface treatment method for amorphous alloy materials of the present invention;

[0025] Figure 2 Metallographic image of the amorphous alloy material according to an embodiment of the present invention;

[0026] Figure 3 Metallographic images of the amorphous alloy materials used in the comparative examples of this invention;

[0027] Figure 4 This is an amorphous diffraction peak diagram of the weld repair area of ​​the amorphous alloy material in an embodiment of the present invention;

[0028] Figure 5 The image shows the amorphous diffraction peaks of the welded area of ​​the amorphous alloy material, which is a comparative example of the present invention.

[0029] Explanation of icon numbers:

[0030] 10 Welding repair area 20 Non-welded repair area

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of the present invention more apparent and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This application provides a surface treatment method for amorphous alloy materials, referring to... Figure 1 The surface treatment method for the amorphous alloy material includes the following steps:

[0034] Step S10: Obtain the amorphous alloy substrate to be processed and the amorphous alloy powder, wherein the surface of the amorphous alloy substrate to be processed has pores, and the composition of the amorphous alloy powder is the same as that of the amorphous alloy substrate to be processed.

[0035] In this embodiment, it should be noted that amorphous alloys, also known as metallic glasses, possess metastable structural characteristics of long-range disorder and short-range order. Compared with traditional crystalline alloys, amorphous alloys exhibit superior properties such as high hardness, high strength, high corrosion resistance, high wear resistance, and magnetic properties, making them well-suited for applications in the casings and structural components of electronic products, such as the mid-frame or outer shell of electronic products, the hinge of foldable screen electronic products, and the hinge of TWS earphone charging cases. However, the main forming method for amorphous alloys is currently die casting, which inevitably leads to porosity defects inside and on the surface of the product. Especially when used as exterior components for smart wearable products, amorphous alloys undergo mirror polishing and PVD decoration treatment in sequence. The porosity on the surface of amorphous alloys caused by die casting seriously affects polishing and subsequent PVD film deposition, resulting in a large number of defective products. The amorphous alloy substrate to be treated refers to an amorphous alloy material with porosity on its surface. It should be noted that the porosity on the surface of the amorphous alloy substrate to be treated can be caused by die casting or other reasons, and this embodiment does not limit this.

[0036] Currently, the main method to solve porosity defects is to fill the pits with laser welding, followed by polishing and PVD. Although this can reduce the appearance defect rate to a certain extent, the high energy of laser welding leads to severe internal heat-affected zone of the die-casting pores. This causes the amorphous alloy in the weld hole and a certain area around the weld hole to crystallize. As a result, after polishing and PVD treatment, the crystalline part and the amorphous part of the alloy material show a severe color difference due to the difference in material grain structure, resulting in poor appearance.

[0037] The pore-sealing treatment of the amorphous alloy substrate refers to the process of melting amorphous alloy powder and filling it into the pores on the surface of the amorphous alloy substrate, followed by cooling and solidification to form a unified whole. During the pore-sealing process, if the temperature of both the amorphous alloy substrate and the amorphous alloy powder is within the crystallization temperature range between the glass transition temperature and the melting temperature, crystallization may occur. Crystallization can occur in at least two ways: in the molten zone and in the heat-affected zone. Crystallization in the molten zone mainly depends on the heating and cooling rates. A higher heating rate allows the temperature of the amorphous alloy to rise above the melting temperature more quickly during melting, thus reducing crystallization. Conversely, a higher cooling rate allows the temperature of the amorphous alloy to drop below the glass transition temperature more quickly during solidification, also reducing crystallization. The heat-affected zone (HAZ) refers to the region of the amorphous alloy substrate that undergoes significant changes in microstructure and properties due to heat absorption during the pore-sealing process. While the HAZ is not directly heated, heat from the melting zone is transferred to it. As heat accumulates, the temperature in the HAZ rises. When the temperature of the HAZ falls within the crystallization temperature range, crystallization occurs. Crystallization in the HAZ primarily depends on the heating time and cooling rate. Shorter heating times result in less heat accumulation and a shorter time the HAZ temperature remains within the crystallization temperature range, thus reducing crystallization. Conversely, faster cooling rates lead to faster heat dissipation and a shorter cooling rate, making heat accumulation less likely and reducing the time the temperature remains within the crystallization temperature range, further minimizing crystallization. Laser welding heating rates can reach over 3000 K / s. However, if the welding speed is too low, heat accumulation and crystallization will occur. Conversely, if the welding speed is too high, the amorphous alloy powder cannot be completely melted. Therefore, to ensure complete melting of the amorphous alloy material, the heating rate for laser welding is typically 10 K / s. 5 -10 6 The temperature needs to be maintained at K / s for a certain period of time, which results in the amorphous alloy being in the crystallization temperature range for a long time. Therefore, when repairing the surface pores of the amorphous alloy by laser welding, local crystallization may occur.

[0038] In this embodiment, on the one hand, by selecting amorphous alloy powder with the same composition as the amorphous alloy substrate to be treated for porosity repair, since the two have the same high-temperature properties, the heat-affected zone generated during the welding process is small, which can effectively reduce the crystallization of the heat-affected zone around the porosity of the amorphous alloy substrate to be treated, thereby reducing discoloration. On the other hand, by using a rapid cooling and heating process, the amorphous alloy powder can be preheated at a temperature higher than 10 6The heating rate of K / s rapidly heats the amorphous alloy to above the melting temperature, ensuring that the non-alloy powder is fully melted. Then, the molten amorphous alloy is filled into the pores. After filling the pores, the molten amorphous alloy is rapidly cooled to below the glass transition temperature at a cooling rate of over 3000℃ / ms. This shortens the time that the molten zone is in the crystallization temperature range and reduces the heat accumulation in the heat-affected zone, thereby shortening the time that the temperature of the heat-affected zone is in the crystallization temperature range. Therefore, it can reduce the crystallization of the molten zone in the pores and the heat-affected zone around the pores.

[0039] As an example, step S10 includes: obtaining an amorphous alloy substrate to be treated for pore sealing and an amorphous alloy powder with the same composition as the amorphous alloy substrate to be treated, wherein the amorphous alloy powder can be prepared in advance based on the composition of the amorphous alloy substrate to be treated.

[0040] Optionally, the method for preparing the amorphous alloy powder includes the following steps:

[0041] Metal raw material powder is prepared and mixed according to a preset atomic ratio to obtain raw material powder mixture;

[0042] The raw material powder is ball-milled to obtain amorphous alloy powder. The ball milling is carried out under an inert atmosphere. The process parameters of the ball milling include: using corundum balls, a ball milling speed of 500-1000 r / min, a ball-to-powder mass ratio of (20-40):1, and a ball milling time of 24-72 h.

[0043] As an example, the type and atomic ratio of the metal raw material powder can be determined in advance based on the composition of the amorphous alloy substrate to be processed. Then, based on the preset atomic ratio, various metal raw material powders are weighed and mixed evenly, keeping them dry during weighing and mixing, resulting in a raw material mixture. This mixture is then added to a ball mill for ball milling to obtain amorphous alloy powder. During the ball milling process, the ball mill jar is evacuated and filled with inert gas to prevent powder oxidation. Corundum balls are used, the milling speed is 500-1000 r / min (e.g., 500 r / min, 800 r / min, 1000 r / min), the ball-to-powder mass ratio is (20-40):1 (e.g., 20:1, 30:1, 40:1), and the milling time is 24-72 h (e.g., 24 h, 48 h, 72 h).

[0044] Optionally, the pore diameter is 0.02-0.5 mm.

[0045] In this embodiment, it should be noted that if the pore size on the surface of the amorphous alloy substrate to be treated is too small, the amorphous alloy powder will have difficulty filling the pores smoothly. After the pores are sealed, a porous structure may still exist inside the material, resulting in little improvement in mechanical properties. If the pore size is too large, the filling time will be too long, which will also lead to heat accumulation and cause the amorphous alloy to crystallize. Therefore, the pore size is determined to be 0.02-0.5 mm, for example, 0.02 mm, 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc.

[0046] In one feasible approach, if the pore size on the surface of the amorphous alloy substrate to be treated is too small, for example, less than 0.02 mm, a polishing pen can be used to enlarge the pores.

[0047] Optionally, the particle size of the amorphous alloy powder is 10-100 μm.

[0048] In this embodiment, it should be noted that if the particle size of the amorphous alloy powder is too large, it will be difficult for the powder to fill the pores smoothly, and the material may still have a porous structure after the pores are sealed, resulting in little improvement in mechanical properties. Conversely, if the particle size of the amorphous alloy powder is too small, its preparation will be more difficult and costly. Therefore, the particle size of the amorphous alloy powder is determined to be 10-100 μm, such as 10 μm, 30 μm, 50 μm, 80 μm, 100 μm, etc.

[0049] Optionally, the amorphous alloy substrate to be processed includes at least one of zirconium-based amorphous alloy, cobalt-based amorphous alloy, iron-based amorphous alloy, magnesium-based amorphous alloy, copper-based amorphous alloy, and titanium-based amorphous alloy.

[0050] Optionally, the zirconium-based amorphous alloy comprises the following components by mass fraction:

[0051] Zr: 50-80%; Ti: 0.1-10%; Cu: 8%-30%; Ni: 3-15%; Al: 1-10%; Y: 0.1-3%; Fe: 0.5%-3%; Total Hf and other elements: ≤8%.

[0052] In this embodiment, it should be noted that zirconium-based amorphous alloys belong to zirconium-based liquid metals, referring to materials with an amorphous or dual structure of amorphous and crystalline states, mainly prepared by mixing zirconium metal and other metallic elements in a certain proportion. They possess excellent properties such as high strength, high hardness, high corrosion resistance, and wear resistance, making them very suitable for applications in the casings and structural components of electronic products.

[0053] Step S20: The amorphous alloy powder is melted using a rapid heating and cooling process and then filled into the pores on the surface of the amorphous alloy substrate to be treated. The molten amorphous alloy is then rapidly cooled to obtain the amorphous alloy material. The heating rate of the amorphous alloy powder is greater than or equal to 10. 6 K / s, wherein the cooling rate of the molten amorphous alloy is greater than or equal to 3000 °C / ms.

[0054] In this embodiment, it should be noted that the rapid heating and cooling process refers to a process that rapidly heats and melts amorphous alloy powder at a high heating rate, then bonds it to the amorphous alloy substrate to be treated, while simultaneously utilizing thermal circulation on the surface of the substrate to rapidly cool and solidify the molten amorphous alloy at a high cooling rate. The lower the heating rate of the amorphous alloy powder, the longer it remains within the crystallization temperature range during heating, resulting in more severe crystallization. This leads to a greater difference in grain structure between the powder and the substrate after filling pores, and a more severe discoloration. Therefore, the heating rate of the amorphous alloy powder is determined to be 10... 6 A cooling rate of 3000°C / ms or higher allows the amorphous alloy powder to instantly reach several thousand degrees Celsius, rapidly reaching temperatures above the melting temperature, effectively shortening the time the amorphous alloy powder remains within the crystallization temperature range. The lower the cooling rate of the molten amorphous alloy, the longer it remains within the crystallization temperature range during cooling, resulting in more severe crystallization. Furthermore, the heat-affected zone on the amorphous alloy substrate will be continuously affected by the amorphous alloy filling the pores for a longer period, accumulating heat and heating it above the glass transition temperature, thus causing crystallization. Therefore, a cooling rate of 3000°C / ms or higher is determined. This ensures that, on the one hand, the molten amorphous alloy can rapidly cool below the glass transition temperature after contacting the amorphous alloy substrate, effectively shortening the time the molten amorphous alloy remains within the crystallization temperature range. On the other hand, it effectively shortens the time the amorphous alloy substrate is subjected to the high-temperature heat of the molten amorphous alloy, and the heat conducted to the amorphous alloy substrate dissipates quickly, reducing heat accumulation in the heat-affected zone and thus shortening the time the temperature of the heat-affected zone remains within the crystallization temperature range. The thermal cycling method may include at least one of air cooling, air cooling, water cooling, etc., of the amorphous alloy substrate to be treated. For example, the amorphous alloy substrate to be treated may be placed in a low-temperature environment, or the surface of the amorphous alloy substrate to be treated may be blown with cold air. The specific method can be determined according to the actual situation, and this embodiment does not limit it.

[0055] As an example, step S20 includes: rapidly heating and melting the amorphous alloy powder at a high heating rate using a rapid heating and cooling process to shorten the time the amorphous alloy powder is in the crystallization temperature range during heating; then filling the pores on the surface of the amorphous alloy substrate to be treated with the molten amorphous alloy, fusing and welding the molten amorphous alloy with the amorphous alloy substrate to be treated, and simultaneously using thermal circulation on the surface of the amorphous alloy substrate to be treated, so that the molten amorphous alloy is rapidly cooled and solidified at a high cooling rate. In this way, on the one hand, the heat transferred from the molten amorphous alloy to the heat-affected zone can be quickly removed by thermal circulation, reducing heat accumulation and thus reducing crystallization in the heat-affected zone; on the other hand, the lower the temperature of the heat-affected zone, the faster the cooling rate, and the faster the cooling rate of the molten zone, the temperature of the molten zone can be quickly reduced to below the glass transition temperature, thereby reducing crystallization in the molten zone. Therefore, an amorphous alloy material with an amorphous content greater than or equal to 95% can be obtained.

[0056] In one feasible approach, the rapid cooling and heating process melts the amorphous alloy powder and then, in the form of amorphous alloy droplets, impacts the porous surface of the amorphous alloy substrate to be treated at supersonic speed. The amorphous alloy droplets spread and cool rapidly, thus preventing crystallization of the heat-affected zone.

[0057] Optionally, the rapid cooling and heating process includes at least one of supersonic plasma spraying, supersonic flame spraying, and arc welding.

[0058] Optionally, the amorphous ratio of the amorphous alloy material is greater than or equal to 95%;

[0059] And / or, the holding time of the molten amorphous alloy in the crystallization temperature range is less than or equal to 70 ms.

[0060] In this embodiment, it should be noted that the rapid cooling and heating process can also ensure that the molten amorphous alloy is held in the crystallization temperature range for less than or equal to 70ms, thereby avoiding crystallization in the molten zone and preventing the molten amorphous alloy from transferring heat to the heat-affected zone, which would cause crystallization in the heat-affected zone. Therefore, an amorphous alloy material with an amorphous content greater than or equal to 95% can be obtained.

[0061] In one feasible approach, before filling the pores with the molten amorphous alloy, the pores on the surface of the amorphous alloy substrate to be treated can be cleaned and dried to remove impurities, avoid interference, and improve the quality of the weld repair. For example, a small number of samples can be cleaned with anhydrous ethanol, while mass production can use a degreasing cleaning line. After cleaning, the sample can be dried at approximately 50°C.

[0062] In this embodiment, the surface treatment method for amorphous alloy materials includes the following steps: obtaining an amorphous alloy substrate to be treated and amorphous alloy powder, wherein the surface of the amorphous alloy substrate to be treated has pores, and the composition of the amorphous alloy powder is the same as that of the amorphous alloy substrate to be treated; melting the amorphous alloy powder using a rapid heating and cooling process, filling the pores on the surface of the amorphous alloy substrate to be treated, and rapidly cooling the molten amorphous alloy to obtain an amorphous alloy material, wherein the heating rate of the amorphous alloy powder is greater than or equal to 10. 6 K / s, wherein the cooling rate of the molten amorphous alloy is greater than or equal to 3000℃ / ms. First, by selecting amorphous alloy powder with the same composition as the amorphous alloy substrate to be treated for porosity repair, since both have similar high-temperature properties, the heat-affected zone generated during welding is smaller, which can effectively reduce crystallization in the heat-affected zone around the porosity of the amorphous alloy substrate, thereby reducing discoloration. Second, through a rapid cooling and heating process, the amorphous alloy powder can be cooled at a temperature higher than 10 K / s. 6 The heating rate of K / s rapidly heats the amorphous alloy to above the melting temperature, ensuring that the non-alloy powder is fully melted. Then, the molten amorphous alloy is filled into the pores. After filling the pores, the molten amorphous alloy is rapidly cooled to below the glass transition temperature at a cooling rate of over 3000℃ / ms. This shortens the time that the molten zone is in the crystallization temperature range and reduces the heat accumulation in the heat-affected zone, thereby shortening the time that the temperature of the heat-affected zone is in the crystallization temperature range. Therefore, it can reduce the crystallization of the molten zone in the pores and the heat-affected zone around the pores. Therefore, this invention overcomes the technical defects of high laser welding energy, which leads to severe internal heat effects in die casting pores, causing crystallization of the amorphous alloy in the weld hole and a certain area around the weld hole. This results in severe discoloration and poor appearance of the crystalline and amorphous parts of the alloy material after polishing and PVD treatment due to differences in material grain structure. This invention can effectively avoid crystallization of amorphous alloys during the pore sealing process. The amorphous rate of the amorphous alloy material obtained after pore sealing treatment using the surface treatment method of amorphous alloy material provided by this invention can reach more than 95%, and no discoloration phenomenon is observed.

[0063] Furthermore, the present invention also provides an amorphous alloy material, which is obtained by performing a surface pore sealing treatment using the amorphous alloy material surface treatment method described above.

[0064] The amorphous alloy material provided by this invention is obtained by sealing surface pores using the surface treatment method described above, thus solving the technical problem of discoloration after repairing surface pores in amorphous alloys using laser welding in related technologies. Compared with the prior art, the beneficial effects of the amorphous alloy material provided by this invention are the same as those of the surface treatment method for amorphous alloy materials provided in the above embodiments, and other technical features of this amorphous alloy material are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0065] Furthermore, the present invention also provides an electronic device comprising the amorphous alloy material described above.

[0066] In one feasible approach, the electronic device can be a head-mounted display device, a smart wearable device, such as VR / AR glasses, VR / AR helmets, etc.

[0067] In one feasible embodiment, at least some of the exterior and / or structural components of the electronic device are made of the amorphous alloy material as described above.

[0068] The electronic device provided in this application solves the technical problem of discoloration after repairing surface pores in amorphous alloys using laser welding in related technologies. Compared with the prior art, the beneficial effects of the electronic device provided in this embodiment are the same as the beneficial effects of the composite materials in the above embodiments, and will not be repeated here.

[0069] The present invention will now be described in detail with reference to specific embodiments and comparative examples. It is to be understood that the following description is merely exemplary and not intended to limit the specific scope of the invention.

[0070] Example

[0071] 1. The amorphous alloy substrate to be processed is a zirconium-based amorphous alloy material. The composition (by mass fraction) of the zirconium-based amorphous alloy material is as follows:

[0072] Zr: 57.69%; Ti: 4.87%; Cu: 19.55%; Ni: 5.42%; Al: 3.26%; Y: 0.8%; Fe: 0.9%; Hf+ and other elements: 7.51%;

[0073] 2. Alloy Powder Preparation: Based on the composition and structure of the amorphous alloy substrate to be treated, the proportions of Zr powder, Ti powder, Cu powder, Ni powder, Al powder, Hf powder, and other elemental powders are determined. First, Zr powder, Ti powder, Cu powder, Ni powder, Al powder, Hf powder, and other elemental powders are mixed according to their respective atomic ratios. Then, the powders are mixed uniformly in a powder mixer while remaining dry. Subsequently, the mixed powder is added to a ball mill for ball milling. The ball mill jar is evacuated and filled with argon gas to prevent oxidation of the powder. Corundum balls are used for ball milling, the ball milling speed is 800 r / min, the ball-to-powder mass ratio is 30:1, and the ball milling time is 48 h, resulting in amorphous alloy powder with a particle size of 10-40 μm.

[0074] 3. Sample pretreatment: Select the amorphous alloy substrate to be treated with pores on the surface, use a polishing pen to enlarge the pores with small diameters, and then use anhydrous ethanol to clean the pores on the surface. After cleaning, dry at 50°C.

[0075] 4. Pore Sealing: A supersonic plasma spraying system is used to spray and melt-weld the pores on the surface of the amorphous alloy substrate to obtain the amorphous alloy material. The process parameters for supersonic plasma spraying include: equipment power 100KW; spraying atmosphere using a mixture of combustible gas, argon, and hydrogen in a ratio of 7.5:1, with an argon flow rate of 90L / min; the combustible gas is approximately 5% methane or a propane-butane mixture; particle temperature ≥3000℃; particle velocity approximately 500m / s; spray distance 100mm; heating rate controlled at 106K / s; and cooling rate controlled at 3000℃ / ms. When filling voids, the alloy material in the filling area is slightly higher than the substrate to facilitate polishing and removal in subsequent processes. For irregular sample structures, tooling can be used for fixation before processing.

[0076] Comparative Example 1

[0077] Using a fiber laser, a zirconium-based amorphous alloy material with the same composition as in Example 1 was laser-welded to the amorphous alloy substrate with the same composition as in Example 1 to obtain the amorphous alloy material. The laser welding process parameters were: power 1000W, speed 100m / s, spot diameter 40μm, and heating rate greater than 5000K / s.

[0078] Comparative Example 2

[0079] Using a supersonic plasma spraying device, a zirconium-based amorphous alloy material with the same composition as in Example 1 was used to weld and repair the amorphous alloy substrate with the same composition as in Example 1 to obtain the amorphous alloy material. The heating rate was less than 106 K / s. In this example, the heating rates were set to 5000 K / s, 104 K / s, and 105 K / s, respectively. Other parameters were the same as those in Example 1.

[0080] Comparative Example 3

[0081] Using a supersonic plasma spraying device, a zirconium-based amorphous alloy material with the same composition as in Example 1 was used to weld and repair the amorphous alloy substrate with the same composition as in Example 1 to obtain the amorphous alloy material. The cooling rate was less than 3000℃ / ms. In this example, the cooling rates were set to 1000℃ / ms, 2000℃ / ms, and 2500℃ / ms, respectively. Other parameters were the same as those in Example 1.

[0082] Metallographic observation was performed on the amorphous alloy materials obtained after pore sealing treatment in the above embodiments and comparative examples. The metallographic images of the embodiments are shown below. Figure 2 As shown, the metallographic diagrams of Comparative Examples 1-3 are as follows: Figure 3 As shown, it should be noted that the metallographic images presented are slightly different due to different scale conditions, but all show obvious crystallization phenomena. Therefore, a single metallographic image is used for schematic representation. XRD was used to test the weld repair area. The amorphous diffraction peak pattern of the weld repair area in the embodiment is shown below. Figure 4 As shown, the amorphous diffraction peak pattern of the weld repair area in Comparative Example 1 is as follows: Figure 5 As shown.

[0083] from Figure 2 It can be seen that, after the pore sealing treatment, the weld repair area 10 in the embodiment has a better uniform grain structure than the non-weld repair area 20, and no crystallization has occurred; while from Figure 3 It can be seen that the weld repair area 10 in the comparative example underwent obvious crystallization after the pore sealing treatment. The grain structure of the weld repair area 10 after the pore sealing treatment is significantly different from that of the non-weld repair area 20, which leads to a severe discoloration phenomenon after subsequent polishing and PVD treatment.

[0084] Figure 4 The peaks were typical of amorphous "bun" shapes, and no other diffraction peaks were observed, indicating that a completely amorphous material could be obtained after the pore-sealing treatment in the embodiment; and from... Figure 5 It can be seen that the weld repair area of ​​the amorphous alloy material in Comparative Example 1 has a typical amorphous phase "bun" peak in the diffraction angle range of 32°-43°, and some Bragg diffraction peaks are present near the diffraction angle of about 46°, indicating that the sample has crystallized.

[0085] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the description of this application, or direct or indirect applications in other related technical fields, are similarly included within the patent scope of this application.

Claims

1. A surface treatment method for amorphous alloy materials, characterized in that, The surface treatment method for the amorphous alloy material includes the following steps: A non-amorphous alloy substrate and amorphous alloy powder are obtained, wherein the surface of the non-amorphous alloy substrate has pores, and the composition of the amorphous alloy powder is the same as that of the non-amorphous alloy substrate. The amorphous alloy powder is melted using a rapid heating and cooling process and then filled into the pores on the surface of the amorphous alloy substrate to be treated. The molten amorphous alloy is then rapidly cooled to obtain the amorphous alloy material. The heating rate of the amorphous alloy powder is greater than or equal to 10... 6 K / s, wherein the cooling rate of the molten amorphous alloy is greater than or equal to 3000 °C / ms.

2. The surface treatment method for amorphous alloy materials as described in claim 1, characterized in that, The amorphous ratio of the amorphous alloy material is greater than or equal to 95%; And / or, the holding time of the molten amorphous alloy in the crystallization temperature range is less than or equal to 70 ms.

3. The surface treatment method for amorphous alloy materials as described in claim 1, characterized in that, The rapid cooling and heating process includes at least one of supersonic plasma spraying, supersonic flame spraying, and arc welding.

4. The surface treatment method for amorphous alloy materials as described in claim 1, characterized in that, The pore diameter is 0.02-0.5 mm.

5. The surface treatment method for amorphous alloy materials as described in claim 1, characterized in that, The particle size of the amorphous alloy powder is 10-100 μm.

6. The surface treatment method for amorphous alloy materials as described in claim 1, characterized in that, The amorphous alloy substrate to be processed includes at least one of zirconium-based amorphous alloy, cobalt-based amorphous alloy, iron-based amorphous alloy, magnesium-based amorphous alloy, copper-based amorphous alloy, and titanium-based amorphous alloy.

7. The surface treatment method for amorphous alloy materials as described in claim 1, characterized in that, The method for preparing the amorphous alloy powder includes the following steps: Metal raw material powder is prepared and mixed according to a preset atomic ratio to obtain raw material powder mixture; The raw material powder is ball-milled to obtain amorphous alloy powder. The ball milling is carried out under an inert atmosphere. The process parameters of the ball milling include: using corundum balls, a ball milling speed of 500-1000 r / min, a ball-to-powder mass ratio of (20-40):1, and a ball milling time of 24-72 h.

8. An amorphous alloy material, characterized in that, The amorphous alloy material is obtained by sealing the surface pores using the surface treatment method for amorphous alloy materials as described in any one of claims 1-7.

9. An electronic device, characterized in that, The electronic device comprises the amorphous alloy material as described in claim 8.

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