Surface treatment methods for particle-reinforced aluminum matrix composite thin sheets

Abstract

This application discloses a surface treatment method for particle-reinforced aluminum matrix composite thin sheets, belonging to the field of aluminum matrix composite material preparation technology. The treatment method provided by this application is carried out in an integrated device, which includes a sandblasting device, an alkaline washing tank, a cleaning tank, a drying device, and a polishing device. The method includes: sandblasting the original particle-reinforced aluminum matrix composite thin sheet; then sending it to an alkaline washing tank for alkaline washing to obtain an alkaline-washed thin sheet; repeatedly cleaning the alkaline-washed thin sheet; drying the cleaned thin sheet; and polishing the dried thin sheet using the polishing device to obtain the treated thin sheet. The treatment method provided by this application has the advantages of high efficiency, low cost, and integration, and is beneficial for improving the surface quality of particle-reinforced aluminum matrix composite thin sheets.

Description

Technical Field

[0001] This application relates to the field of aluminum-based composite material preparation technology, specifically to a surface treatment method for particle-reinforced aluminum-based composite thin sheets. Background Technology

[0002] Particle-reinforced aluminum matrix composites possess comprehensive performance advantages such as lightweight, high specific strength, high specific stiffness, high thermal conductivity, and low coefficient of thermal expansion. They have gradually replaced traditional metal materials such as aluminum alloys, titanium alloys, and steel, and are used in components for aviation, aerospace, marine, and weaponry that have high requirements for lightweighting, structural performance, and thermal stability. The products mainly serve key and important fields such as national defense and military industries, and are multi-variety, small-batch products.

[0003] Particle-reinforced aluminum matrix composite sheet materials are typically produced by hot rolling. The material surface is prone to defects such as oxide scale, carbonized oil stains, or micro-pits caused by tiny impurities, thus requiring surface treatment. However, existing treatment methods are not only cumbersome but also ineffective, necessitating an efficient treatment approach. Summary of the Invention

[0004] In view of the defects or deficiencies of the existing technology, the purpose of this application is to provide a surface treatment method for particle-reinforced aluminum matrix composite thin sheets.

[0005] In a first aspect, this application provides a surface treatment method for particle-reinforced aluminum matrix composite thin sheets, the method being carried out in an integrated device, the integrated device including a sandblasting device, an alkaline washing tank, a cleaning tank, a drying device, and a polishing device;

[0006] The method includes:

[0007] The original sheet material of particle-reinforced aluminum matrix composite thin plate is treated by the aforementioned sandblasting device;

[0008] The thin sheet material is obtained by alkaline washing after being fed into the alkaline washing tank.

[0009] The thin sheet material after alkaline washing is cleaned multiple times;

[0010] Drying the cleaned thin sheet material;

[0011] The dried thin sheet is polished using the polishing device to obtain the processed thin sheet.

[0012] In some embodiments, the sandblasting device includes multiple sets of nozzles, with at least some of the nozzles having multiple nozzles;

[0013] Preferably, each nozzle is directed towards the surface of the original sheet material of the particle-reinforced aluminum matrix composite material;

[0014] Preferably, the distance between the nozzle and the surface of the original sheet of the particle-reinforced aluminum matrix composite material is no more than 320 mm, and more preferably 200 mm to 300 mm.

[0015] Preferably, the injection pressure of the nozzle is not higher than 0.2 MPa, and more preferably 0.05 MPa to 0.15 MPa;

[0016] Preferably, the sand particles ejected from the nozzle are round brown fused alumina and / or white fused alumina with a diameter of 0.15 mm to 0.4 mm.

[0017] In some embodiments, the alkaline washing tank contains an alkaline solution, which contains an aqueous solution of at least one of sodium hydroxide, potassium hydroxide, sodium carbonate, and sodium silicate.

[0018] Preferably, the concentration of the alkali solution is 30 g / L to 100 g / L, and more preferably 35 g / L to 90 g / L;

[0019] Preferably, the temperature of the alkaline solution is 45℃~90℃, and more preferably 50℃~80℃;

[0020] Preferably, the alkaline washing time is 10s to 60s, and more preferably 20s to 50s.

[0021] In some embodiments, the polishing apparatus includes a conveying platform and a polishing wheel, wherein the thin sheet is attached to the surface of the conveying platform and is displaced relative to the polishing wheel under the drive of the conveying platform;

[0022] Preferably, the polishing process includes multiple single-sided polishing operations;

[0023] Preferably, the polishing wheel has a mesh count of not less than 800.

[0024] In some embodiments, the cleaning includes cleaning in multiple ultrasonic cleaning tanks respectively;

[0025] Preferably, the ultrasonic cleaning temperature is 10–60°C;

[0026] Preferably, the cleaning time of each ultrasonic cleaning tank is 30s to 60s.

[0027] In some embodiments, the integrated equipment includes a sandblasting device, an alkaline washing tank, a first cleaning tank, a first drying device, a leveling device, a cutting device, a polishing device, a second cleaning tank, and a second drying device connected in sequence.

[0028] In some embodiments, the thickness of the original sheet of the particle-reinforced aluminum matrix composite material is no more than 0.5 mm, preferably 0.1 mm to 0.4 mm;

[0029] Preferably, the hardness of the original board material is 100HV to 200HV;

[0030] Preferably, the yield strength of the original plate is 300MPa to 500MPa.

[0031] In some embodiments, the roughness of the original sheet material of the particle-reinforced aluminum matrix composite sheet is 0.5 μm to 1.0 μm, preferably 0.6 μm to 0.8 μm.

[0032] The second aspect of this application is to provide a particle-reinforced aluminum matrix composite sheet, which is prepared by the surface treatment method described in the first aspect;

[0033] Preferably, the roughness of the treated thin sheet is 0.15μm to 0.25μm, and more preferably 0.18μm to 0.22μm.

[0034] A third aspect of this application is to provide the application of a thin sheet material prepared by the surface treatment method described in the first aspect or the thin sheet material described in the second aspect in an electronic packaging device. Attached Figure Description

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0036] Figure 1 This is a schematic diagram showing the positional relationship of the integrated device used in the processing method disclosed in some embodiments of this application;

[0037] Figure 2 This is a process flow diagram of the processing method disclosed in some embodiments of this application;

[0038] Figure 3 These are photographs of the original sheet material of particle-reinforced aluminum matrix composite thin plates according to some embodiments of this application;

[0039] Figure 4 These are photographs of particle-reinforced aluminum matrix composite sheets after processing, according to some embodiments of this application.

[0040] The numbers in the diagram are as follows:

[0041] 100. Sandblasting device; 200. Alkali washing tank; 300. First cleaning tank; 400. First drying device; 500. Leveling device; 600. Cutting device; 700. Polishing device; 800. Second cleaning tank; 900. Second drying device;

[0042] 201, First limiting wheel; 301, Second limiting wheel; 302, First suction roller; 401, Second suction roller; 601, Cutting machine; 701, Polishing wheel; 901, Third suction roller. Detailed Implementation

[0043] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0044] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0045] Terminology Definition

[0046] Unless otherwise expressly stated otherwise, all scopes referenced in this application include end values.

[0047] The terms “a” or “an” are used in this application to describe the elements and components described herein. This is done solely for convenience and to provide a general meaning for the scope of this application. Such a description should be understood to include one or at least one, and the singular includes the plural, unless clearly otherwise indicated. “Multiple” means two or more.

[0048] All figures in this application are approximate values, regardless of whether words such as "approximately" or "about" are used. The numerical values ​​may vary by 1%, 2%, 5%, 7%, 8%, 10%, etc. Whenever a figure with a value of N is disclosed, any figure with values ​​of N+ / -1%, N+ / -2%, N+ / -3%, N+ / -5%, N+ / -7%, N+ / -8%, or N+ / -10% will be explicitly disclosed, where "+ / -" indicates addition or subtraction, and the range from N-10% to N+10% is also disclosed.

[0049] Particle-reinforced aluminum matrix composite sheet is usually produced by hot rolling. During hot rolling, the billet is heated to 300-500℃. Due to this heating temperature, oxide scale and carbonized oil stains are easily generated on the material surface during hot rolling. In addition, tiny impurity particles are easily pressed into the material surface during hot rolling. After the impurity particles fall off, they form micro-pit defects. Therefore, particle-reinforced aluminum matrix composite sheet must be ground after rolling to remove oxide scale, carbonized oil stains, micro-defects, etc. from the material surface.

[0050] Existing processing methods include grinding, with conventional grinding methods including the use of abrasive belts or grinding wheels. Abrasive belts are highly efficient, especially for grinding thick plate surfaces, where coarse abrasive belts can quickly remove surface defects at a lower cost. Grinding wheels generally have weaker cutting forces, requiring multiple passes to achieve a certain amount of material removal, resulting in lower grinding efficiency. However, compared to abrasive belt grinding, grinding wheels produce a more uniform, smooth, and aesthetically pleasing surface finish, and they also have a longer lifespan and lower cost. Therefore, grinding wheels are mainly used for fine grinding or polishing.

[0051] For thin sheets of particle-reinforced aluminum matrix composites with a certain degree of hardness and strength, coarse abrasive belts can severely damage the surface condition, leading to easy breakage along the abrasion marks during subsequent processing. Fine abrasive belts, on the other hand, have weak cutting forces and are easily worn out, failing to completely remove surface defects and incurring very high grinding costs. Furthermore, the uniformity of abrasive particles in the belt is crucial for particle-reinforced aluminum matrix composites; uneven particle size can easily cause large abrasive particles to damage the surface during grinding. Grinding wheels have weaker cutting forces than abrasive belts, making it difficult to completely remove oxide scale and defects from the surface of thin sheets. Repeated grinding is inefficient, and with each grinding cycle, the surface hardens, making grinding even more difficult. Therefore, for the surface grinding of ultra-hard and ultra-strong ultra-thin particle-reinforced aluminum matrix composites, a grinding method with moderate cutting force, minimal surface damage, and high efficiency is needed.

[0052] Based on the above design concept, this application discloses a surface treatment method for particle-reinforced aluminum matrix composite thin sheets. This treatment method has the advantages of high efficiency, low cost and integration. Moreover, since the cutting force in the treatment method is moderate and the surface damage is small, it is beneficial to improve the surface quality of particle-reinforced aluminum matrix composite thin sheets (to obtain a uniform, delicate and clean surface effect).

[0053] To achieve the above-mentioned technical objectives, this application discloses a surface treatment method for particle-reinforced aluminum matrix composite thin sheets. This method is performed in an integrated device, which includes a sandblasting device, an alkaline washing tank, a cleaning tank, a drying device, and a polishing device. The method comprises: sandblasting the original particle-reinforced aluminum matrix composite thin sheet; then sending it to an alkaline washing tank for alkaline washing to obtain an alkaline-washed thin sheet; repeatedly cleaning the alkaline-washed thin sheet; drying the cleaned thin sheet; and polishing the dried thin sheet using the polishing device to obtain the treated thin sheet.

[0054] The particle-reinforced aluminum matrix composite material in this application is a slab composed of ceramic particles and an Al matrix, which is then hot-rolled to obtain a thin sheet material with certain strength and hardness. Furthermore, the method of combining the ceramic particles and the Al matrix includes, but is not limited to, conventional methods in the art.

[0055] In some embodiments of this application, the volume fraction of the ceramic particles is 15% to 30% based on the total volume of the composite material formed by the ceramic particles and the Al matrix.

[0056] In some embodiments of this application, the ceramic particles include, but are not limited to, one or more of SiC, B4C, Al2O3, Si, TiB2, Si3N4, etc., and the particle size of the ceramic particles is 0.5μm to 10μm.

[0057] In some embodiments of this application, the Al matrix includes, but is not limited to, one or more of 6xxxAl, 7xxxAl, 2xxxAl, or 5xxxAl series aluminum alloys.

[0058] In some embodiments of this application, the hardness of the original sheet material is 100HV to 200HV;

[0059] In some embodiments of this application, the yield strength of the original sheet material is 300MPa to 500MPa.

[0060] In some embodiments of this application, the roughness of the original sheet material is 0.5μm to 1.0μm, and the roughness is 0.6μm to 0.8μm.

[0061] The thin sheet material in this application has a certain hardness. Generally speaking, the higher the hardness, the better its wear resistance, and the more difficult it is to grind. For the relatively difficult-to-grind thin sheet material in this application, the processing method provided by this application uses an integrated equipment for grinding. At the same time, the thin sheet material provided by this application also has a certain strength. For thin sheet materials, the higher the strength, the stronger the material's resistance to deformation. The surface treatment method of this application includes sandblasting. When sand particles are sprayed onto the thin sheet material under a certain pressure, if the thin sheet material has low strength, it is very easy to undergo severe deformation. Therefore, this application selects a thin sheet material with a certain strength and improves the grinding effect by controlling the sandblasting process parameters, such as sandblasting pressure and distance.

[0062] The integrated equipment provided in this application is used for online continuous processing. Online sandblasting and online alkaline washing facilitate the rapid removal of oxide scale and oil stains from the surface of the thin sheet material, while polishing produces a uniform, fine, and clean surface. Further integration with online cleaning and drying processes helps minimize surface damage to the thin sheet. Compared to existing processing methods, the method provided in this application offers advantages such as high efficiency, low cost, and integration, and also improves the surface quality of particle-reinforced aluminum matrix composite thin sheets.

[0063] In some embodiments of this application, the sandblasting device includes multiple sets of nozzles, with at least some nozzles having multiple nozzles. In these embodiments, the sandblasting device is preferably a pressure-type automatic sandblasting machine. The model of this pressure-type automatic sandblasting machine is not specifically limited, and the pressure-type automatic sandblasting machine is equipped with three sets of nozzles, with a spacing of approximately 0.5m between each set of nozzles. This application does not impose specific limitations on the distance between each set of nozzles and can flexibly adjust it according to actual conditions. The specific distances given in this application are only for illustrative purposes. Meanwhile, each set of nozzles includes two nozzles, one above the other. The sand particles ejected by the nozzles include, but are not limited to, round brown corundum or round white corundum. The diameter of the sand particles is 0.15mm to 0.4mm.

[0064] In some embodiments of this application, each nozzle is directed towards the surface of the original sheet material of particle-reinforced aluminum matrix composite material; in these embodiments, the distance between the nozzle and the surface of the original sheet material of particle-reinforced aluminum matrix composite material is no greater than 320 mm, preferably 200 mm to 300 mm. The spray angle of the nozzle is 40° to 60°.

[0065] In some embodiments, this application also discloses that the distance between the nozzle and the surface of the original sheet of particle-reinforced aluminum matrix composite material satisfies any one of 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm, 300mm or any one of the values ​​within this range.

[0066] In some embodiments, this application also discloses that the nozzle spray angle is any one of 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60° or any value within that range.

[0067] In some embodiments of this application, the injection pressure of the nozzle is not higher than 0.2 MPa, preferably 0.05 MPa to 0.15 MPa.

[0068] In some embodiments, this application also discloses that the nozzle injection pressure is any one of 0.05 MPa, 0.06 MPa, 0.07 MPa, 0.08 MPa, 0.09 MPa, 0.10 MPa, 0.11 MPa, 0.12 MPa, 0.13 MPa, 0.14 MPa, or 0.15 MPa, or any value within that range.

[0069] In some embodiments of this application, the online sandblasting time is 60s to 120s. In some embodiments of this application, the online sandblasting time is also disclosed to be any one of 60s, 70s, 80s, 90s, 100s, 110s, or 120s, or any value within this range.

[0070] In some embodiments of this application, limiting wheels are provided at the opening of the alkaline washing tank to ensure that the plate is fully alkaline washed inside. The alkaline washing tank contains an alkaline solution, which is an aqueous solution of at least one of sodium hydroxide, potassium hydroxide, sodium carbonate, and sodium silicate. In these embodiments, the concentration of the alkaline solution is 30 g / L to 100 g / L, preferably 35 g / L to 90 g / L; the temperature of the alkaline solution is 45°C to 90°C, preferably 50°C to 80°C; and the alkaline washing time is 10 s to 60 s, preferably 20 s to 50 s.

[0071] In some embodiments of this application, the concentration of the alkali solution can be any one of 30 g / L, 40 g / L, 50 g / L, 60 g / L, 70 g / L, 80 g / L, 90 g / L, or 100 g / L, or any value within this range. The temperature of the alkali solution can be any one of 45°C, 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, 80°C, 85°C, or 90°C, or any value within this range. The alkali washing time can be any one of 10 s, 20 s, 30 s, 40 s, 50 s, or 60 s, or any value within this range.

[0072] In some embodiments of this application, the polishing apparatus includes, but is not limited to, a surface polishing machine. This surface polishing machine can only perform single-sided polishing; after polishing one side of the material, it needs to be flipped over for further polishing. The surface polishing machine includes a conveyor platform and a polishing wheel. The thin sheet material is adhered to the surface of the conveyor platform and is displaced relative to the polishing wheel under the movement of the conveyor platform. Because the thin sheet material is tightly adhered to the surface of the conveyor platform, defects such as wrinkles in the thin sheet material or unnecessary other displacements during polishing can be reduced, thereby improving the polishing effect. In these embodiments, the polishing process includes multiple single-sided polishing operations; and the polishing wheel contains silicon carbide particles, and the mesh size of the polishing wheel is not less than 800 mesh, preferably 800 to 1500 mesh.

[0073] In some embodiments of this application, the integrated device includes a sandblasting device, an alkaline washing tank, a first cleaning tank, a first drying device, a leveling device, a cutting device, a polishing device, and a second cleaning tank and a second drying device connected in sequence.

[0074] In some embodiments of this application, the first cleaning tank includes an ultrasonic cleaning device comprising multiple ultrasonic cleaning tanks. The thin sheet is cleaned in each of the multiple ultrasonic cleaning tanks. The ultrasonic cleaning temperature is 10℃ to 60℃, and the cleaning time of the thin sheet in each ultrasonic cleaning tank is 30s to 60s. In these embodiments, this application discloses ultrasonic cleaning temperatures of any one of 10℃, 20℃, 30℃, 40℃, 50℃, and 60℃, or any value within this range. The cleaning time in each ultrasonic cleaning tank is any one of 30s, 35s, 40s, 45s, 50s, 55s, and 60s, or any value within this range.

[0075] In some embodiments of this application, the first drying device is a continuous belt dryer connected to absorbent rollers, such as sponge absorbent rollers, to absorb most of the surface moisture of the thin sheet before it enters the dryer. In these embodiments, the drying temperature is 60°C to 120°C, and the drying time is 30s to 90s.

[0076] In some embodiments of this application, the drying temperature in the first drying apparatus is any one of 60°C, 70°C, 80°C, 90°C, 100°C, 110°C, and 120°C, or any value within this range. The drying time is any one of 30s, 35s, 40s, 45s, 50s, 55s, 60s, 65s, 70s, 75s, 80s, 85s, and 90s, or any value within this range.

[0077] In some embodiments of this application, the leveling device includes, but is not limited to, a roller precision leveling machine. In this type of roller precision leveling machine, the number of leveling rollers is 19 to 25, the diameter of the leveling rollers is 8 mm to 15 mm, and the running speed of the leveling machine is 1 m / min to 5 m / min. These embodiments of this application include leveling and straightening the original roll of thin sheet material.

[0078] In some embodiments of this application, the cutting device includes, but is not limited to, a fully automatic cutting machine with a feeding speed of 1 mm / s to 200 mm / s.

[0079] In some embodiments of this application, the cleaning water temperature in the second cleaning tank is 45–60°C.

[0080] In some embodiments of this application, the second drying device is also a continuous belt dryer, which is connected to absorbent rollers, such as sponge absorbent rollers, so that most of the surface moisture of the thin sheet is absorbed before it enters the dryer. In these embodiments, the drying temperature is 60°C to 120°C, and the drying time is 30s to 90s.

[0081] like Figure 1 This application discloses a schematic diagram of the connection structure of an integrated device, combined with... Figure 1 It is understood that the integrated equipment includes a sandblasting device 100, an alkaline washing tank 200, a first cleaning tank 300, a first drying device 400, a leveling device 500, a cutting device 600, a polishing device 700, a second cleaning tank 800, and a second drying device 900 connected in sequence. Specifically, first limiting wheels 201 are provided at both ends of the alkaline washing tank 200, and second limiting wheels 301 are provided at the beginning and end of the opening of the first cleaning tank 300. The limiting wheels are used to restrict the position of the boards to ensure that the boards undergo sufficient and effective alkaline washing and water washing. Figure 1 It is also known that a water-absorbing roller is installed in the adjacent position of the drying device.

[0082] like Figure 2 This application discloses the use of... Figure 1 The process flow diagram for surface treatment of the equipment includes the following steps:

[0083] S100, Online sandblasting treatment of the original sheet material of particle-reinforced aluminum matrix composite material;

[0084] S200, online alkaline washing;

[0085] S300, multiple ultrasonic cleaning

[0086] S400, online drying;

[0087] S500, leveling treatment;

[0088] S600, online cutting;

[0089] S700, polishing treatment;

[0090] S800, cleaning;

[0091] S900, drying.

[0092] The second aspect of this application is to provide a particle-reinforced aluminum matrix composite sheet, which is prepared by the above-mentioned surface treatment method, and the roughness of the treated sheet is 0.15μm to 0.25μm, preferably 0.18μm to 0.22μm.

[0093] The third aspect of this application is to provide the use of a thin sheet material obtained by the processing method of the first aspect or the thin sheet material of the second aspect, especially in electronic packaging devices.

[0094] Unless otherwise specified, the experimental methods used in the following examples are all conventional methods.

[0095] Unless otherwise specified, all materials and reagents used in the following examples are commercially available.

[0096] This application may employ conventional inorganic chemistry techniques within the art. In the following examples, efforts have been made to ensure the accuracy of the figures used (including quantities, temperatures, reaction times, etc.), but some experimental errors and deviations should be considered. Temperatures (in degrees Celsius) used in the following examples are expressed in °C, and pressures are at or near atmospheric pressure. All reagents were purchased from Ar-grade sources, and all reactions were carried out under argon protection. Unless otherwise stated, all reagents were obtained commercially.

[0097] Example 1

[0098] A surface treatment method for particle-reinforced aluminum matrix composite thin sheets is provided:

[0099] The material is a 0.18mm thick, 180mm wide roll-type silicon carbide particle-reinforced aluminum matrix composite material with a surface hardness of 152HV and an original surface roughness Ra of 0.6μm. The surface condition of the material before polishing is as follows. Figure 3 As shown, the material surface has an oxide layer, carbonized oil stains, rolling defects, etc. The grinding process is as follows: Figure 2 As shown, the specific steps and parameters are as follows:

[0100] S100. Online sandblasting treatment is performed on the roll of the original sheet material of particle-reinforced aluminum matrix composite material; the sand particle diameter is 0.2mm, the sand particle spraying air pressure is 0.1MPa, the spraying angle is 45°, the spraying distance is 250mm, the online passage time of the strip through the sandblasting machine is 60s, and the total removal amount of the material on both sides after sandblasting is about 0.02mm.

[0101] S200, online alkaline washing; alkaline solution concentration 50g / L, alkaline solution heating temperature 60℃, strip passes through alkaline solution online for 40s, material removal on both sides after alkaline washing is about 0.01mm;

[0102] S300, multiple ultrasonic cleaning; three cleaning steps are performed in a 3-tank ultrasonic cleaner. The water temperature in the first cleaning tank is 60℃, and the water temperature in the second and third cleaning tanks is about 25℃. The time spent in each ultrasonic cleaning tank is 45 seconds.

[0103] S400, online drying; after ultrasonic cleaning, the surface moisture is absorbed by the sponge absorbent roller, and then dried in a belt dryer with a set temperature of 100℃.

[0104] S500, leveling treatment; after drying, a precision leveling machine with 10mm roller diameter and 19 leveling rollers (9 on top and 10 on the bottom) is used for leveling treatment at a speed of 2m / min.

[0105] S600, online cutting; uses an automatic cutting machine to cut strips into 180*180mm sheet materials, with a cutting feed speed of 2m / min;

[0106] S700 Polishing treatment; After cutting, use a flat polishing machine to polish the 180*180mm sheet material. The polishing wheel has a mesh size of 1500 and the total material removal on both sides is 2μm.

[0107] S800, cleaning; after polishing, the sheet material is placed in a circulating water tank for cleaning for 10 seconds;

[0108] S900, Drying: After the surface moisture is absorbed by the sponge absorbent roller, the sheet is finally put into the belt dryer for rapid drying. The sheet material passes through the dryer for 60 seconds.

[0109] Through the above polishing process, a product piece with a surface roughness Ra of 0.18μm and dimensions of approximately 180*180*0.15mm is finally obtained. The surface condition of the material after polishing is as follows: Figure 4 As shown, the material surface is free of oxide layer, carbonized oil stains and rolling defects, and the grinding texture is uniform and delicate.

[0110] Example 2

[0111] A surface treatment method for particle-reinforced aluminum matrix composite thin sheets is provided:

[0112] The material is a 0.24mm thick, 120mm wide roll-type silicon carbide particle-reinforced aluminum matrix composite material with a surface hardness of 160HV and an initial surface roughness Ra of 0.8μm. The material surface contains an oxide layer, carbonized oil stains, and rolling defects. The grinding process is as follows... Figure 2 As shown, the specific steps and parameters are as follows:

[0113] S100. Online sandblasting treatment is performed on the roll of the original sheet material of particle-reinforced aluminum matrix composite material; the sand particle diameter is 0.2mm, the sand particle spraying air pressure is 0.1MPa, the spraying angle is 45°, the spraying distance is 250mm, the online passage time of the strip through the sandblasting machine is 60s, and the total removal amount of the material on both sides after sandblasting is about 0.02mm.

[0114] S200, online alkaline washing; alkaline solution concentration 50g / L, alkaline solution heating temperature 60℃, strip passes through alkaline solution online for 40s, material removal on both sides after alkaline washing is about 0.01mm;

[0115] S300, multiple ultrasonic cleaning; three cleaning steps are performed in a 3-tank ultrasonic cleaner. The water temperature in the first cleaning tank is 60℃, and the water temperature in the second and third cleaning tanks is about 25℃. The time spent in each ultrasonic cleaning tank is 45 seconds.

[0116] S400, online drying; after ultrasonic cleaning, the surface moisture is absorbed by the sponge absorbent roller, and then dried in a belt dryer with a set temperature of 100℃.

[0117] S500, leveling treatment; after drying, a precision leveling machine with 10mm roller diameter and 19 leveling rollers (9 on top and 10 on the bottom) is used for leveling treatment at a speed of 2m / min.

[0118] S600, online cutting; uses an automatic cutting machine to cut strips into 180*180mm sheet materials, with a cutting feed speed of 2m / min;

[0119] S700 Polishing treatment; After cutting, use a flat polishing machine to polish the 180*180mm sheet material. The polishing wheel has a mesh size of 1200 and the total material removal on both sides is 2μm.

[0120] S800, cleaning; after polishing, the sheet material is placed in a circulating water tank for cleaning for 10 seconds;

[0121] S900, Drying: After the surface moisture is absorbed by the sponge absorbent roller, the sheet is finally put into the belt dryer for rapid drying. The sheet material passes through the dryer for 60 seconds.

[0122] Through the above polishing process, a product sheet with a surface roughness Ra of 0.19μm and a size of approximately 180*120*0.21mm is finally obtained. After polishing, the surface of the material is free of oxide layer, carbonized oil stains and rolling defects, and the polishing texture is uniform and delicate.

[0123] Example 3

[0124] A surface treatment method for particle-reinforced aluminum matrix composite thin sheets is provided:

[0125] The material is a 0.24mm thick, 120mm wide roll-type silicon carbide particle-reinforced aluminum matrix composite material with a surface hardness of 160HV and an original surface roughness of Ra 0.8μm. Before grinding, the material surface has an oxide layer, carbonized oil stains, and rolling defects. The grinding process is as follows: Figure 2 As shown, the specific steps and parameters are as follows:

[0126] S100. Online sandblasting treatment is performed on the roll of the original sheet material of particle-reinforced aluminum matrix composite material; the sand particle diameter is 0.35mm, the sand particle spraying air pressure is 0.1MPa, the spraying angle is 45°, the spraying distance is 200mm, the online passage time of the strip through the sandblasting machine is 60s, and the total removal amount of the material on both sides after sandblasting is about 0.03mm.

[0127] S200, online alkaline washing; alkaline solution concentration 50g / L, alkaline solution heating temperature 80℃, strip passing through alkaline solution online for 60s, material removal on both sides after alkaline washing is about 0.02mm;

[0128] S300, multiple ultrasonic cleaning; three cleaning steps are performed in a 3-tank ultrasonic cleaner. The water temperature in the first cleaning tank is 60℃, and the water temperature in the second and third cleaning tanks is about 25℃. The time spent in each ultrasonic cleaning tank is 45 seconds.

[0129] S400, online drying; after ultrasonic cleaning, the surface moisture is absorbed by the sponge absorbent roller, and then dried in a belt dryer with a set temperature of 100℃.

[0130] S500, leveling treatment; after drying, a precision leveling machine with 10mm roller diameter and 19 leveling rollers (9 on top and 10 on the bottom) is used for leveling treatment at a speed of 2m / min.

[0131] S600, online cutting; uses an automatic cutting machine to cut strips into 180*120mm sheet materials, with a cutting feed speed of 2m / min;

[0132] S700 Polishing treatment; After cutting, use a flat polishing machine to polish the 180*120mm sheet material. The polishing wheel has a mesh size of 1200, and the total material removal on both sides is 2μm.

[0133] S800, cleaning; after polishing, the sheet material is placed in a circulating water tank for cleaning for 10 seconds;

[0134] S900, Drying: After the surface moisture is absorbed by the sponge absorbent roller, the sheet is finally put into the belt dryer for rapid drying. The sheet material passes through the dryer for 60 seconds.

[0135] Through the above polishing process, a product sheet with a surface roughness Ra of 0.22μm and a size of approximately 180*120*0.19mm is finally obtained. After polishing, the surface of the material is free of oxide layer, carbonized oil stains and rolling defects, and the polishing texture is uniform and delicate.

[0136] Example 4

[0137] A surface treatment method for particle-reinforced aluminum matrix composite thin sheets is provided:

[0138] The material is a 0.24mm thick, 120mm wide roll-type silicon carbide particle-reinforced aluminum matrix composite material with a surface hardness of 160HV and an original surface roughness of Ra 0.8μm. Before grinding, the material surface has an oxide layer, carbonized oil stains, and rolling defects. The grinding process is as follows: Figure 2 As shown, the specific steps and parameters are as follows:

[0139] S100. Online sandblasting treatment is performed on the roll of the original sheet material of particle-reinforced aluminum matrix composite material; the sand particle diameter is 0.3mm, the sand particle spraying air pressure is 0.1MPa, the spraying angle is 45°, the spraying distance is 250mm, the online passage time of the strip through the sandblasting machine is 60s, and the total removal amount of the material on both sides after sandblasting is about 0.025mm.

[0140] S200, online alkaline washing; alkaline solution concentration 50g / L, alkaline solution heating temperature 60℃, strip passes through alkaline solution online for 40s, material removal on both sides after alkaline washing is about 0.01mm;

[0141] S300, multiple ultrasonic cleaning; three cleaning steps are performed in a 3-tank ultrasonic cleaner. The water temperature in the first cleaning tank is 60℃, and the water temperature in the second and third cleaning tanks is about 25℃. The time spent in each ultrasonic cleaning tank is 45 seconds.

[0142] S400, online drying; after ultrasonic cleaning, the surface moisture is absorbed by the sponge absorbent roller, and then dried in a belt dryer with a set temperature of 100℃.

[0143] S500, leveling treatment; after drying, a precision leveling machine with 10mm roller diameter and 19 leveling rollers (9 on top and 10 on the bottom) is used for leveling treatment at a speed of 2m / min.

[0144] S600, online cutting; uses an automatic cutting machine to cut strips into 180*120mm sheet materials, with a cutting feed speed of 2m / min;

[0145] S700 Polishing treatment; After cutting, use a flat polishing machine to polish the 180*120mm sheet material. The polishing wheel has a mesh size of 1200, and the total material removal on both sides is 2μm.

[0146] S800, cleaning; after polishing, the sheet material is placed in a circulating water tank for cleaning for 10 seconds;

[0147] S900, Drying: After the surface moisture is absorbed by the sponge absorbent roller, the sheet is finally put into the belt dryer for rapid drying. The sheet material passes through the dryer for 60 seconds.

[0148] Through the above polishing process, a product sheet with a surface roughness Ra of 0.2μm and a size of approximately 180*120*0.20mm is finally obtained. After polishing, the surface of the material is free of oxide layer, carbonized oil stains and rolling defects, and the polishing texture is uniform and delicate.

[0149] Example 5

[0150] A surface treatment method for particle-reinforced aluminum matrix composite thin sheets is provided:

[0151] The material is a 0.24mm thick, 120mm wide roll-type silicon carbide particle-reinforced aluminum matrix composite material with a surface hardness of 160HV and an original surface roughness of Ra 0.8μm. Before grinding, the material surface has an oxide layer, carbonized oil stains, and rolling defects. The grinding process is as follows: Figure 2 As shown, the specific steps and parameters are as follows:

[0152] S100. Online sandblasting treatment is performed on the roll of the original sheet material of particle-reinforced aluminum matrix composite material; the sand particle diameter is 0.2mm, the sand particle spraying air pressure is 0.1MPa, the spraying angle is 45°, the spraying distance is 250mm, the online passage time of the strip through the sandblasting machine is 60s, and the total removal amount of the material on both sides after sandblasting is about 0.02mm.

[0153] S200, online alkaline washing; alkaline solution concentration 50g / L, alkaline solution heating temperature 80℃, strip passing through alkaline solution online for 60s, material removal on both sides after alkaline washing is about 0.02mm;

[0154] S300, multiple ultrasonic cleaning; three cleaning steps are performed in a 3-tank ultrasonic cleaner. The water temperature in the first cleaning tank is 60℃, and the water temperature in the second and third cleaning tanks is about 25℃. The time spent in each ultrasonic cleaning tank is 45 seconds.

[0155] S400, online drying; after ultrasonic cleaning, the surface moisture is absorbed by the sponge absorbent roller, and then dried in a belt dryer with a set temperature of 100℃.

[0156] S500, leveling treatment; after drying, a precision leveling machine with 10mm roller diameter and 19 leveling rollers (9 on top and 10 on the bottom) is used for leveling treatment at a speed of 2m / min.

[0157] S600, online cutting; uses an automatic cutting machine to cut strips into 180*120mm sheet materials, with a cutting feed speed of 2m / min;

[0158] S700 Polishing treatment; After cutting, use a flat polishing machine to polish the 180*120mm sheet material. The polishing wheel has a mesh size of 1200, and the total material removal on both sides is 2μm.

[0159] S800, cleaning; after polishing, the sheet material is placed in a circulating water tank for cleaning for 10 seconds;

[0160] S900, Drying: After the surface moisture is absorbed by the sponge absorbent roller, the sheet is finally put into the belt dryer for rapid drying. The sheet material passes through the dryer for 60 seconds.

[0161] Through the above polishing process, a product sheet with a surface roughness Ra of 0.2μm and a size of approximately 180*120*0.20mm is finally obtained. After polishing, the surface of the material is free of oxide layer, carbonized oil stains and rolling defects, and the polishing texture is uniform and delicate.

[0162] Example 6

[0163] The difference from Example 1 is that the sandblasting particle size is 0.15 mm.

[0164] Example 7

[0165] The difference from Example 1 is that the sandblasting particle size is 0.4 mm.

[0166] Example 8

[0167] The difference from Example 1 is that the nozzle distance is 300mm.

[0168] Example 9

[0169] The difference from Example 1 is that the injection pressure is 0.05 MPa.

[0170] Example 10

[0171] The difference from Example 1 is that the injection pressure is 0.15 MPa.

[0172] Example 11

[0173] The difference from Example 1 is that the concentration of the alkali solution is 30 g / L and the temperature is 90°C.

[0174] Example 12

[0175] The difference from Example 1 is that the concentration of the alkali solution is 100 g / L and the temperature is 45°C.

[0176] Comparative Example 1

[0177] The thin sheet material of Example 1 was polished using an existing coarse abrasive belt.

[0178] Comparative Example 2

[0179] The thin sheet material of Example 1 was polished using an existing grinding wheel belt.

[0180] Comparative Example 3

[0181] The difference from Example 1 is that there is no sandblasting process.

[0182] Comparative Example 4

[0183] The difference from Example 1 is that there is no alkaline washing step.

[0184] Comparative Example 5

[0185] The difference from Example 1 is that there is no polishing step.

[0186] Table 1 Parameter List

[0187]

[0188]

[0189]

[0190] Performance testing:

[0191] (1) Surface roughness:

[0192] Roughness tester was used for direct measurement.

[0193] (2) Yield strength:

[0194] GB / T 34505-2017 Tensile testing at room temperature.

[0195] (3) Hardness:

[0196] GB / T 4340.1-2009 Vickers hardness test for metallic materials.

[0197] Table 2 Parameter and Performance List

[0198]

[0199]

[0200]

[0201] In summary, this application discloses a surface treatment method for particle-reinforced aluminum matrix composite thin sheets. This method has the advantages of high efficiency, low cost, and integration. Moreover, because the cutting force in the treatment method is moderate and the surface damage is small, it is beneficial to improve the surface quality of particle-reinforced aluminum matrix composite thin sheets (to obtain a uniform, delicate, and clean surface effect).

[0202] The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this application; at the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this application. Therefore, the content of this specification should not be construed as a limitation of this application.

[0203] Certain terms are used in the specification and claims to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The terms "comprising" and "including" used throughout the specification and claims are open-ended and should be interpreted as "comprising / including but not limited to". "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error. The following descriptions in the specification are preferred embodiments for carrying out this application; however, these descriptions are for the purpose of illustrating the general principles of this application and are not intended to limit the scope of this application. The scope of protection of this application shall be determined by the appended claims.

[0204] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0205] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0206] The foregoing description illustrates and describes several preferred embodiments of this application. However, as previously stated, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be protected within the scope of the appended claims.

Claims

1. A surface treatment method for a particle-reinforced aluminum matrix composite thin sheet, characterized in that: The method is carried out in an integrated device, which includes a sandblasting device, an alkaline washing tank, a first cleaning tank, a first drying device, a leveling device, a cutting device, a polishing device, a second cleaning tank, and a second drying device connected in sequence. Particle-reinforced aluminum matrix composite material is a slab made of ceramic particles and an Al matrix. The slab is then hot-rolled to obtain a thin sheet with a certain strength and hardness. The hardness of the thin sheet is 100HV~200HV. The yield strength of the original sheet material is 300MPa~500MPa; The method includes: The original sheet material of particle-reinforced aluminum matrix composite material is treated by the sandblasting device; the sandblasting device includes multiple sets of nozzles, and at least some nozzles are provided with multiple nozzles; the spraying air pressure of the nozzles is not higher than 0.2 MPa; the sand particles sprayed by the nozzles are round brown corundum and / or white corundum with a diameter of 0.15 mm to 0.4 mm. The thin sheet material is obtained by alkaline washing after being fed into the alkaline washing tank. The thin sheet material after alkaline washing is cleaned multiple times; Drying the cleaned thin sheet material; The dried thin sheet is polished using the polishing device to obtain the treated thin sheet. The roughness of the processed thin plate is 0.15μm~0.25μm.

2. The surface treatment method according to claim 1, characterized in that: The sandblasting device includes multiple sets of nozzles, and at least some of the nozzles are equipped with multiple nozzles. Each nozzle is aimed at the surface of the original sheet material of the particle-reinforced aluminum matrix composite material; The distance between the nozzle and the surface of the original sheet of the particle-reinforced aluminum matrix composite material is no more than 320 mm. The injection pressure of the nozzle is 0.05 MPa to 0.15 MPa.

3. The surface treatment method according to claim 2, characterized in that: The distance between the nozzle and the surface of the original sheet of particle-reinforced aluminum matrix composite material is 200mm~300mm.

4. The surface treatment method according to claim 1 or 2, characterized in that: The alkaline washing tank contains an alkaline solution, which is an aqueous solution of at least one of sodium hydroxide, potassium hydroxide, sodium carbonate, and sodium silicate. The concentration of the alkaline solution is 30 g / L to 100 g / L; The temperature of the alkaline solution is 45℃~90℃; The alkaline washing time is 10s to 60s.

5. The surface treatment method according to claim 4, characterized in that: The concentration of the alkaline solution is 35 g / L to 90 g / L; The temperature of the alkaline solution is 50℃~80℃; The alkaline washing time is 20s~50s.

6. The surface treatment method according to claim 1 or 2, characterized in that: The polishing device includes a conveying platform and a polishing wheel. The thin sheet is attached to the surface of the conveying platform and is displaced relative to the polishing wheel under the drive of the conveying platform. The polishing process includes multiple single-sided polishing operations; The polishing wheel has a mesh count of not less than 800.

7. The surface treatment method according to claim 6, characterized in that: The polishing wheel has a mesh size of 800 to 1500.

8. The surface treatment method according to claim 1 or 2, characterized in that: The cleaning process involves cleaning separately in multiple ultrasonic cleaning tanks. The ultrasonic cleaning temperature is 10~60℃; The cleaning time for each ultrasonic cleaning tank is 30s~60s.

9. The surface treatment method according to claim 1 or 2, characterized in that: The thickness of the original sheet material of the particle-reinforced aluminum matrix composite material is no more than 0.5 mm.

10. The surface treatment method according to claim 9, characterized in that: The thickness of the original sheet material of the particle-reinforced aluminum matrix composite material is 0.1mm~0.4mm.

11. The surface treatment method according to claim 1 or 2, characterized in that: The roughness of the original sheet material of the particle-reinforced aluminum matrix composite material is 0.5μm to 1.0μm.

12. The surface treatment method according to claim 11, characterized in that: The surface roughness of the original sheet material of the particle-reinforced aluminum matrix composite material is 0.6μm~0.8μm.

13. A thin sheet of particle-reinforced aluminum matrix composite material, characterized in that, Prepared by the surface treatment method according to any one of claims 1 to 8; The roughness of the processed thin plate is 0.15μm~0.25μm.

14. The thin sheet according to claim 13, characterized in that, The roughness of the processed thin plate is 0.18μm~0.22μm.

15. The use of the thin sheet material as described in claim 13 or 14 in an electronic packaging device.

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