Metal composite plate and method of making and using same

Abstract

The application provides a metal composite plate and a preparation method and application thereof. The metal composite plate comprises a first aluminum alloy layer, a first damping glue layer, a magnesium alloy layer, a second damping glue layer and a second aluminum alloy layer which are sequentially stacked. The material of the first damping glue layer and the second damping glue layer is independently selected from any one of nitrile rubber, butyl rubber and epoxy resin. The metal composite plate provided by the application can meet the demand of light weight while having good shock absorption, and has good corrosion resistance and metal processability, thereby widening the application scenarios.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal materials, in particular to a composite metal composite plate and a preparation method and application thereof. BACKGROUND

[0002] NVH (Noise, Vibration, Harshness) is a general term for various indicators such as automobile noise, vibration and sound roughness, and the NVH control level has gradually become one of the important signs for measuring the safety and comfort quality of automobiles. During the driving of the whole vehicle, noise will be generated due to the vibration of the automobile structure, which will affect the comfort. Improving the damping coefficient of the automobile can effectively improve the NVH performance of the automobile, thereby improving the comfort of the whole vehicle, so the industry usually uses damping composite steel plates to improve the damping coefficient.

[0003] However, the damping composite steel plate still has the following problems: the damping composite steel plate is too heavy in density, which cannot meet the requirement of lightweight of the automobile body; the corrosion resistance of the damping composite steel plate is poor, and surface treatment is required, thereby increasing the manufacturing cost. SUMMARY

[0004] In view of this, the present application provides a metal composite plate and a preparation method and application thereof. The metal composite plate comprises a first aluminum alloy layer, a first damping glue layer, a magnesium alloy layer, a second damping glue layer and a second aluminum alloy layer which are sequentially stacked. The metal composite plate provided by the present application can meet the requirements of lightweight and good damping by adopting the design of the laminated structure of aluminum alloy-magnesium alloy-aluminum alloy and selecting appropriate damping glue between the aluminum alloy and the magnesium alloy. The metal composite plate also has good corrosion resistance and metal processability, thereby widening the application scenarios thereof.

[0005] The first aspect of the present application provides a metal composite plate, which comprises a first aluminum alloy layer, a first damping glue layer, a magnesium alloy layer, a second damping glue layer and a second aluminum alloy layer which are sequentially stacked; the material of the first damping glue layer and the second damping glue layer is independently selected from any one of nitrile rubber, butyl rubber and epoxy resin.

[0006] In the embodiments of the present application, the thickness of the first damping glue layer is 10-30 μm.

[0007] In the embodiments of the present application, the thickness of the second damping glue layer is 10-30 μm.

[0008] In some embodiments of the present application, the material of the first damping glue layer and the second damping glue layer is the same.

[0009] In the embodiments of the present application, the thickness ratio of the first aluminum alloy layer to the magnesium alloy layer is 1:(2-6).

[0010] In the embodiment of the present application, the thickness ratio of the second aluminum alloy layer to the magnesium alloy layer is 1:(2-6).

[0011] In the embodiment of the present application, the thickness of the first aluminum alloy layer is 0.2mm-0.4mm.

[0012] In the embodiment of the present application, the thickness of the second aluminum alloy layer is 0.2mm-0.4mm.

[0013] In the embodiment of the present application, the total thickness of the metal composite plate is 1.4mm-2.0mm.

[0014] In the embodiment of the present application, the damping coefficient of the metal composite plate is greater than or equal to 0.3.

[0015] In the embodiment of the present application, the cold temperature limit deep drawing ratio of the metal composite plate is greater than or equal to 1.6.

[0016] The second aspect of the present application provides a preparation method of the metal composite plate provided in the first aspect of the present application, comprising:

[0017] The magnesium alloy is arranged between the first aluminum alloy and the second aluminum alloy, a first damping glue is arranged between the first aluminum alloy and the magnesium alloy, a second damping glue is arranged between the second aluminum alloy and the magnesium alloy, and baking treatment, hot pressing, and curing treatment are sequentially performed to obtain the metal composite plate.

[0018] In the embodiment of the present application, the temperature of the baking treatment is 100℃-200℃, and the time of the baking treatment is 5min-10min.

[0019] In the embodiment of the present application, the hot pressing is rolling, the temperature of the rolling is 200℃-300℃, the pressure of the rolling is 2MPa-10MPa, and the speed of the rolling is 2mm / min-10mm / min.

[0020] In the embodiment of the present application, the temperature of the curing treatment is 150℃-200℃, and the time of the curing treatment is 2min-10min.

[0021] The third aspect of the present application provides a structural member, which comprises the metal composite plate provided in the first aspect of the present application or the metal composite plate prepared by the preparation method provided in the second aspect of the present application.

[0022] The fourth aspect of the present application provides a power assembly system, which comprises the structural member provided in the third aspect of the present application.

[0023] The fifth aspect of the present application provides a vehicle, which comprises the power assembly system provided by the fourth aspect of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. The specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0025] Figure 1 A cross-sectional structure schematic diagram of the metal composite plate provided by an embodiment of the present application is shown in the figure.

[0026] Figure 2 A flow chart of the preparation method of the metal composite plate provided by an embodiment of the present application is shown in the figure.

[0027] Figure 3 A production line schematic diagram of the preparation method of the metal composite plate provided by an embodiment of the present application is shown in the figure.

[0028] EXPLANATION OF DRAWINGS

[0029] 100-metal composite plate; 101-first aluminum alloy layer; 102-first damping adhesive layer; 103-magnesium alloy layer; 104-second damping adhesive layer; 105-second aluminum alloy layer; 1-first aluminum roll; 11-first aluminum alloy; 2-magnesium roll; 21-magnesium alloy; 3-second aluminum roll; 31-second aluminum alloy; 4-metal composite roll; 41-metal composite plate; 5-first baking treatment device; 6-second baking treatment device; 7-curing treatment device; 8-first roll coating device; 9-second roll coating device; 10-hot-pressing composite device. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below by combining the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0031] NVH (Noise, Vibration, Harshness) is a general term for various indicators such as automobile noise, vibration and sound roughness, and the NVH control level has gradually become one of the important indicators for measuring the safety and comfort quality of the automobile. During the driving process of the whole vehicle, noise will be generated due to the vibration of the automobile structure, which will affect the comfort. The powertrain system is one of the most core components of electric vehicles and hybrid vehicles, and through material innovation to realize the noise reduction of the powertrain system, it is crucial to realize the comfort of the whole vehicle. Improving the damping coefficient of the powertrain system can effectively improve the NVH performance of the automobile, thereby improving the comfort of the whole vehicle.

[0032] At present, the industry usually uses damping composite steel plates to improve the damping coefficient. However, the density of the damping composite steel plate is too large, and the use of gas to make structural parts will significantly increase the overall weight of the vehicle, which cannot meet the current industry demand for the lightweight trend of the automobile body. In addition, the damping composite steel plate has poor corrosion resistance due to the main component of steel, which cannot meet the requirements of the body structure for corrosion resistance, and needs to be subjected to subsequent surface treatment processes such as powder spraying, coating, electrophoresis and the like to improve corrosion resistance, thereby prolonging the production process and increasing the production cost. In addition, there are some methods that use aluminum alloy and steel composite to reduce the weight of the metal composite plate, but the peeling strength between the composite metal layers is low, which cannot meet the stamping forming of complex structural parts.

[0033] In view of the above problems, the present application provides a metal composite plate, which comprises a first aluminum alloy layer, a first damping glue layer, a magnesium alloy layer, a second damping glue layer and a second aluminum alloy layer which are sequentially stacked. The metal composite plate provided by the present application can make the metal composite plate have good shock absorption while meeting the demand for lightweight by adopting the design of the laminated structure of aluminum alloy-magnesium alloy-aluminum alloy and selecting appropriate damping glue between the aluminum alloy and the magnesium alloy. The metal composite plate also has good corrosion resistance and metal processability, which widens its application scenarios.

[0034] As Figure 1As shown, the present application provides a metal composite plate 100, which comprises a first aluminum alloy layer 101, a first damping glue layer 102, a magnesium alloy layer 103, a second damping glue layer 104 and a second aluminum alloy layer 105 arranged in sequence. The metal composite plate provided by the present application is obtained by compounding aluminum alloy and magnesium alloy. The densities of the aluminum alloy and the magnesium alloy are both less than the density of steel material. The metal composite plate obtained by compounding the magnesium alloy and the aluminum alloy can significantly reduce the weight, meet the requirements of lightweight materials in various vibration reduction fields. The density of the magnesium alloy is less than that of the common metal alloy. Compared with the pure aluminum alloy, the compounding of the magnesium alloy and the aluminum alloy can further reduce the overall weight of the metal composite plate. Compared with the aluminum alloy and the steel, the magnesium alloy has a higher vibration damping capacity and a very strong vibration reduction effect. The structural member prepared therefrom can meet the demand for comfort of vehicles. In addition, the structure of the metal and glue of the "aluminum alloy-damping glue-magnesium alloy-damping glue-aluminum alloy" alternately stacked in multiple layers can also have a better vibration reduction effect, effectively alleviate the vibration and noise generated during the use of the automobile, and improve the user experience. In the present application, the first aluminum alloy layer 101 and the second aluminum alloy layer 105 are arranged at the outermost layer of the metal composite plate as the exposed surface during use. This is because the aluminum alloy has excellent corrosion resistance compared with the magnesium alloy. Using the aluminum alloy as the surface metal layer of the metal composite plate can improve the surface performance of the metal composite plate, especially the corrosion resistance, avoiding surface treatment processes such as powder spraying, coating, electrophoresis and the like to improve the corrosion resistance of the material, thereby shortening the process flow and reducing the production cost. In addition, the ultimate tensile ratio of the magnesium alloy layer 103 at room temperature is small, and the stamping forming performance is poor, which is not conducive to the subsequent forming processing of the complex structural member at room temperature. By clamping the magnesium alloy layer 103 with the first aluminum alloy layer 101 and the second aluminum alloy layer 105, the aluminum alloy can play a role in restraining the deformation of the magnesium alloy and reinforcing the deformation resistance of the magnesium alloy, improving the ultimate tensile ratio of the metal composite plate at room temperature, and improving the stamping forming performance of the metal composite plate at room temperature. In the subsequent stamping process of preparing the structural member, heating is not required, the process is shortened, and the cost is saved. In the present application, the material of the first damping glue layer 102 and the second damping glue layer 104 is independently selected from any one of nitrile rubber, butyl rubber and epoxy resin. The first damping glue layer 102 and the second damping glue layer 104 can effectively connect the aluminum alloy layer and the magnesium alloy layer, improve the peeling strength between the layers of the metal composite plate and the bonding performance of the whole metal composite plate, avoid the peeling and falling off between the aluminum alloy and the magnesium alloy during the subsequent processing such as stamping, and effectively alleviate the cracking caused by the uneven deformation stress and stress concentration of the magnesium alloy layer 103, improve the deformation capacity of the metal composite plate, and facilitate the subsequent forming processing, thereby widening the application scenarios.

[0035] In this embodiment, the metal composite plate can be a metal processing raw material, which can be subsequently formed and processed according to actual usage requirements to obtain the corresponding product. In this embodiment, the shape of the metal composite plate is not required; depending on different usage requirements, the shape of the metal composite plate includes, but is not limited to, thick plates, foils, and strips (coils).

[0036] In this embodiment of the application, the thickness of the first damping adhesive layer 102 is 10μm-30μm, and the thickness of the second damping adhesive layer 104 is 10μm-30μm. In some embodiments of the application, the thickness of the first damping adhesive layer 102 may be, for example, 10μm, 12μm, 14μm, 15μm, 16μm, 18μm, 20μm, 22μm, 24μm, 25μm, 26μm, 28μm, or 30μm, and the thickness of the second damping adhesive layer 104 may be, for example, 10μm, 12μm, 14μm, 15μm, 16μm, 18μm, 20μm, 22μm, 24μm, 25μm, 26μm, 28μm, or 30μm. This application ensures effective bonding of the aluminum alloy layer and magnesium alloy layer by controlling the thickness of the damping adhesive layer within a suitable range, without affecting the mechanical properties of the metal composite panel, thus giving the metal composite panel both good mechanical properties and overall bonding.

[0037] In this application, the thicknesses of the first damping adhesive layer 102 and the second damping adhesive layer 104 can be the same or different. In some embodiments of this application, the absolute value of the difference between the thickness of the first damping adhesive layer 102 and the thickness of the second damping adhesive layer 104 is less than or equal to 10 μm. By controlling the thicknesses of the first damping adhesive layer and the second damping adhesive layer to be within a relatively close range, the overall mechanical uniformity of the metal composite plate can be further improved.

[0038] In this embodiment, the material of the first damping adhesive layer 102 is selected from any one of nitrile rubber, butyl rubber, and epoxy resin, and the material of the second damping adhesive layer 104 is selected from any one of nitrile rubber, butyl rubber, and epoxy resin. The materials of the first and second damping adhesive layers can be the same or different. This application selects suitable damping adhesives based on the characteristics of the aluminum alloy and magnesium alloy layers to be bonded. These damping adhesives have advantages such as viscoelasticity, oil resistance, aging resistance, and high damping ratio. Using the above-mentioned damping adhesives to prepare the first and second damping adhesive layers can effectively absorb and dissipate vibration energy. By selecting suitable damping adhesives, the bonding force between the layers of the metal composite plate can be improved, thereby improving the subsequent processing and forming performance of the metal composite plate. In some embodiments of this application, the first damping adhesive layer 102 and the second damping adhesive layer 104 are made of the same material. Using the same material for the two damping layers can further improve the overall mechanical uniformity of the metal composite plate.

[0039] In this embodiment, the thickness ratio of the first aluminum alloy layer 101 to the magnesium alloy layer 103 is 1:(2-6), and the thickness ratio of the second aluminum alloy layer 105 to the magnesium alloy layer 103 is also 1:(2-6). In some specific embodiments, the thickness ratio of the first aluminum alloy layer 101 to the magnesium alloy layer 103 can be, for example, 1:2, 1:3, 1:4, 1:5, or 1:6, and the thickness ratio of the second aluminum alloy layer 105 to the magnesium alloy layer 103 can be, for example, 1:2, 1:3, 1:4, 1:5, or 1:6. By controlling the thickness ratio of the aluminum alloy and magnesium alloy within a suitable range, this application can ensure that the metal composite plate has the good mechanical properties and corrosion resistance of aluminum alloy, while using as much magnesium alloy as possible to reduce the weight of the metal composite plate and improve its damping coefficient.

[0040] In this embodiment of the application, the thickness of the first aluminum alloy layer 101 is 0.2mm-0.4mm, and the thickness of the second aluminum alloy layer 105 is 0.2mm-0.4mm. In some embodiments of the application, the thickness of the first aluminum alloy layer 101 may be, for example, 0.2mm, 0.22mm, 0.24mm, 0.25mm, 0.26mm, 0.28mm, 0.3mm, 0.32mm, 0.34mm, 0.35mm, 0.36mm, 0.38mm, or 0.4mm, and the thickness of the second aluminum alloy layer 105 may be, for example, 0.2mm, 0.22mm, 0.24mm, 0.25mm, 0.26mm, 0.28mm, 0.3mm, 0.32mm, 0.34mm, 0.35mm, 0.36mm, 0.38mm, or 0.4mm. This application ensures that the metal composite plate possesses good surface corrosion resistance and good mechanical properties by controlling the thickness of the aluminum alloy layer within a suitable range. In embodiments of this application, the thicknesses of the first aluminum alloy layer 101 and the second aluminum alloy layer 105 can be the same or different. In some embodiments of this application, the absolute value of the difference between the thickness of the first aluminum alloy layer 101 and the thickness of the second aluminum alloy layer 105 is less than or equal to 0.2 nm. In some specific embodiments of this application, the absolute value of the difference between the thickness of the first aluminum alloy layer 101 and the thickness of the second aluminum alloy layer 105 can be less than or equal to 0.1 nm. In some specific embodiments, the absolute value of the difference between the thickness of the first aluminum alloy layer 101 and the thickness of the second aluminum alloy layer 105 can be, for example, 0 nm, 0.02 nm, 0.03 nm, 0.05 nm, 0.06 nm, 0.08 nm, 0.1 nm, 0.15 nm, or 0.2 nm. By controlling the thicknesses of the first and second aluminum alloy layers within a relatively close range, the overall mechanical uniformity of the metal composite plate can be further improved.

[0041] In this embodiment of the application, the total thickness of the metal composite plate 100 is 1.4mm-2.0mm. In some specific embodiments, the total thickness of the metal composite plate may be, for example, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2.0mm.

[0042] In this application, the damping coefficient of the metal composite plate 100 is greater than or equal to 0.3. In this application, the damping coefficient can be tested using the cantilever beam method, and the testing equipment can be, for example, a vibration damping characteristic test analyzer. The testing standard can be, for example, ASTM E756-05 (Standard Test Method for Measuring the Vibration Damping Characteristics of Materials). In some specific embodiments of this application, the damping coefficient of the metal composite plate 100 can be, for example, 0.3, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.4, 0.45, 0.5, or 0.6. Generally, in the art, a damping coefficient greater than or equal to 0.3 is considered high damping, meaning it has good damping and vibration reduction effects.

[0043] In this embodiment, the room-temperature maximum drawing ratio of the metal composite plate 100 is greater than or equal to 1.6. This room-temperature maximum drawing ratio can be measured through a deep-drawing test at room temperature. The deep-drawing test, also called the deep-drawing test, is a simulated forming test method for evaluating the deep-drawing performance of materials. Deep-drawing performance refers to the ability of a thin metal sheet to resist breakage near the punch fillet under the condition that no wrinkling occurs in the main deformation zone of the flange during deep drawing. In this application, the deep-drawing test mainly refers to the Sweet cup test, using the maximum drawing ratio (LDR) as a test method to evaluate the deep-drawing performance of the sheet metal. During the test, metal composite plates of different diameters are placed in a mold and tested under specified conditions to determine the maximum blank diameter (D0) of the deep-drawn part without breakage. max With the diameter d of the punch p The ratio of D0 to D0 is called the limit drawing ratio, denoted by LDR, i.e., LDR = (D0) / D0. max / d p The larger the LDR value, the better the deep drawing performance of the corresponding sheet material. In some specific embodiments of this application, the room temperature limit deep drawing ratio of the metal composite sheet 100 can be, for example, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, 1.97, 2, 2.01, 2.05, 2.1, 2.12, 2.15, 2.2, 2.25, 2.3, 2.35, 2.4, or 2.5.

[0044] The metal composite plate provided in this application uses two aluminum alloy layers sandwiching a magnesium alloy layer, and selects a suitable damping adhesive to bond the magnesium alloy layer and the aluminum alloy layer. The resulting metal composite plate has good shock absorption while meeting the requirements of lightweight. The metal composite plate also has good corrosion resistance and metal processing properties, which broadens its application scenarios.

[0045] This application also provides a method for preparing the metal composite plate 100 provided above, comprising:

[0046] Magnesium alloy is placed between a first aluminum alloy and a second aluminum alloy. A first damping adhesive is placed between the first aluminum alloy and the magnesium alloy, and a second damping adhesive is placed between the second aluminum alloy and the magnesium alloy. The metal composite plate is then subjected to baking, hot pressing, and curing processes in sequence.

[0047] In some specific embodiments, the flowchart of the preparation method of the metal composite plate 100 is as follows: Figure 2 As shown, it includes:

[0048] S101. Place the magnesium alloy between the first aluminum alloy and the second aluminum alloy. Coat the first aluminum alloy with the bonding surface to be bonded to the magnesium alloy and bake it. Coat the second aluminum alloy with the bonding surface to be bonded to the magnesium alloy and bake it.

[0049] S102. The first aluminum alloy coated with the first damping adhesive, the magnesium alloy, and the second aluminum alloy coated with the second damping adhesive are hot-pressed together and then cured to obtain a metal composite plate.

[0050] In some embodiments of this application, the magnesium alloy, the first aluminum alloy, the second aluminum alloy, and the metal composite plate 100 are, but are not limited to, plates, strips, and foils, and the hot-pressing composite method is rolling. In step S101, the magnesium alloy is placed between the first aluminum alloy and the second aluminum alloy, specifically, the first aluminum alloy, the magnesium alloy, and the second aluminum alloy can be stacked sequentially in the thickness direction. The preparation method of the metal composite plate 100 is described in detail below using this case as an example, and a specific production line diagram is shown below. Figure 3 As shown. In step S101, magnesium alloy 21 is placed between the first aluminum alloy 11 and the second aluminum alloy 31. The first aluminum alloy 11, magnesium alloy 21, and second aluminum alloy 31 are obtained by unwinding the first aluminum coil 1, magnesium coil 2, and second aluminum coil 3, respectively. After unwinding, the first aluminum alloy 11 is coated with a first damping adhesive by the first roller coating device 8. The coated surface is the surface to be bonded to the magnesium alloy 21. After coating, it is simultaneously conveyed to the first baking treatment device 5 for baking treatment along with the magnesium alloy 21. At the same time, the second aluminum alloy 31 is coated with a second damping adhesive by the second roller coating device 9. The coated surface is the surface to be bonded to the magnesium alloy 21. After coating, it is conveyed to the second baking treatment device 6 for baking treatment.

[0051] In step S101, the first damping adhesive and / or the second damping adhesive includes any one of nitrile rubber, butyl rubber, and epoxy resin. In embodiments of this application, the first and second damping adhesives further include a solvent and a curing agent. In some specific embodiments, the solvent includes, but is not limited to, ethyl acetate; the mass percentage of the solvent in the first and second damping adhesives is 30%-70%. By selecting a suitable solvent and controlling the solvent content within a suitable range, this application can help the first and second damping adhesives to fully dissolve each component, improving the uniformity of the first and second damping adhesives. In some specific embodiments of this application, the curing agent includes one or more of substituted urea, ethylenediamine, dicyandiamide, and polyamide; the mass percentage of the curing agent in the first and second damping adhesives is 1%-10%. By selecting a suitable curing agent and controlling the curing agent content within a suitable range, this application can further improve the bonding strength between the damping adhesive and the metal plate (aluminum alloy and magnesium alloy).

[0052] In this embodiment, the baking temperature is 100℃-200℃, and the baking time is 5min-10min. In some specific embodiments, the baking temperature can be, for example, 100℃, 110℃, 120℃, 130℃, 140℃, 150℃, 160℃, 170℃, 180℃, 190℃, or 200℃; and the baking time can be, for example, 5min, 6min, 7min, 8min, 9min, or 10min. This application ensures that the solvent in the damping adhesive is removed as much as possible by controlling the baking temperature and time within a suitable range.

[0053] In step S102, the hot-pressing composite is performed by rolling. In some embodiments, the rolling can be hot rolling. The first aluminum alloy 11 coated with the first damping adhesive, the magnesium alloy 21, and the second aluminum alloy 31 coated with the second damping adhesive are conveyed to the hot-pressing composite device 10 in a sequentially stacked order for rolling hot-pressing composite. In some embodiments of this application, the number of rolling rolls can be, for example, three pairs. By controlling the number of rolls to three pairs, the effect of rolling hot-pressing composite can be further improved. Controlling the number of rolls can, on the one hand, better remove excess gas from the damping adhesive during the hot-pressing composite process; on the other hand, it can also better complete the wetting and pre-curing of the metal plates (aluminum alloy and magnesium alloy) by the damping adhesive, which is convenient for subsequent curing treatment.

[0054] In this embodiment, the rolling temperature is 200℃-300℃, the pressure is 2MPa-10MPa, and the rolling speed is 2mm / min-10mm / min. In some specific embodiments, the rolling temperature can be, for example, 200℃, 210℃, 220℃, 230℃, 240℃, 250℃, 260℃, 270℃, 280℃, 290℃, or 300℃; the rolling pressure can be, for example, 2MPa, 3MPa, 4MPa, 5MPa, 6MPa, 7MPa, 8MPa, 9MPa, or 10MPa; and the rolling speed can be, for example, 2mm / min, 3mm / min, 4mm / min, 5mm / min, 6mm / min, 7mm / min, 8mm / min, 9mm / min, or 10mm / min. Hot pressing is a prerequisite for subsequent curing. By controlling the relevant parameters of hot pressing within a suitable range, this application enables the damping adhesive to better wet the aluminum alloy and magnesium alloy, thereby further enhancing the bonding force between the layers of the metal composite plate.

[0055] In this embodiment, after hot pressing, the metal composite plate is further transferred to a curing device 7 for curing to obtain a metal composite plate 41, which is then wound up to obtain a metal composite roll 4. In this embodiment, the curing temperature is 150℃-200℃, and the curing time is 2min-10min. In some specific embodiments, the curing temperature can be, for example, 150℃, 160℃, 170℃, 180℃, 190℃, or 200℃; and the curing time can be, for example, 2min, 3min, 4min, 5min, 6min, 7min, 8min, 9min, or 10min. The curing process allows the damping adhesive to solidify and form a damping adhesive layer, thereby improving the bonding strength between the layers of the metal composite plate.

[0056] The metal composite plate preparation method provided in this application has a simple process flow, does not require excessive surface treatment, reduces production costs, and the resulting metal composite plate has good bonding performance between layers. The metal composite plate is lightweight, has good vibration damping effect, good corrosion resistance, and good forming and processing performance, making it easy to use as a raw material to obtain structural components.

[0057] This application also provides a structural component, which includes the metal composite plate provided above or the metal composite plate prepared by the preparation method provided above. In embodiments of this application, the structural component includes, but is not limited to, an electronic control box, an on-board power supply box, a controller housing, a transmission assembly box, an electric drive housing, and a battery pack tray.

[0058] This application also provides a powertrain system in which at least one component adopts the structural component provided above in this application.

[0059] This application also provides a vehicle that includes the powertrain system described above.

[0060] The effects of the technical solution in this application will be further illustrated below with specific examples.

[0061] Example 1

[0062] like Figure 3 As shown, firstly, aluminum coil No. 1 and aluminum coil No. 3 are unwound, and then nitrile rubber damping adhesive is used to coat the first coating device No. 8 and the second coating device No. 9. Then, the magnesium coil and the coated aluminum coil are baked using the first baking treatment device No. 5 and the second baking treatment device No. 6, respectively, at a temperature of 200℃ for 10 minutes. Next, the baked aluminum and magnesium coils are hot-pressed together using the hot-pressing composite device No. 10 (from top to bottom: aluminum coil with damping adhesive layer, magnesium coil, aluminum coil with damping adhesive layer), at a rolling temperature of 200℃, a rolling pressure of 5MPa, and a rolling speed of 5mm / min. Finally, the hot-pressed composite metal plate is cured using the curing treatment device No. 7 at a temperature of 150℃ for 10 minutes. After winding, the metal composite plate is obtained. In the metal composite plate prepared in this embodiment, the first aluminum alloy layer is 5052-O aluminum alloy with a thickness of 0.1 mm; the magnesium alloy layer is AZ31 magnesium alloy with a thickness of 1.4 mm; and the second aluminum alloy layer is 5052-O aluminum alloy with a thickness of 0.1 mm.

[0063] Example 2

[0064] The difference from Example 1 is that the thickness of the first aluminum alloy layer is 0.2 mm, the thickness of the magnesium alloy layer is 1.2 mm, and the thickness of the second aluminum alloy layer is 0.2 mm.

[0065] Example 3

[0066] The difference from Example 1 is that the thickness of the first aluminum alloy layer is 0.3 mm, the thickness of the magnesium alloy layer is 1.0 mm, and the thickness of the second aluminum alloy layer is 0.3 mm.

[0067] Example 4

[0068] The difference from Example 1 is that the thickness of the first aluminum alloy layer is 0.4 mm, the thickness of the magnesium alloy layer is 0.8 mm, and the thickness of the second aluminum alloy layer is 0.4 mm.

[0069] Example 5

[0070] The difference from Example 1 is that the thickness of the first aluminum alloy layer is 0.5 mm, the thickness of the magnesium alloy layer is 0.6 mm, and the thickness of the second aluminum alloy layer is 0.5 mm.

[0071] Comparative Example 1

[0072] The difference from Example 1 is that in the metal composite plate prepared in this comparative example, the first aluminum alloy layer is replaced with AZ31 magnesium alloy with a thickness of 0.1 mm, and the second aluminum alloy layer is replaced with AZ31 magnesium alloy with a thickness of 0.1 mm.

[0073] Comparative Example 2

[0074] The difference from Example 1 is that in the metal composite plate prepared in this comparative example, the magnesium alloy layer is replaced with 5052-O aluminum alloy with a thickness of 1.4 mm.

[0075] Comparative Example 3

[0076] The difference from Example 1 is that the metal composite plate prepared in this comparative example does not have a second aluminum alloy layer.

[0077] Performance testing

[0078] Performance tests were conducted on Examples 1-5 and Comparative Examples 1-3, and the results are shown in Table 1.

[0079] Damping coefficient: The cantilever beam method was used, the testing equipment was a vibration damping characteristic test and analysis instrument, and the testing standard was ASTM E756-05 (standard test method for measuring the vibration damping characteristics of materials).

[0080] Room temperature limit drawing ratio: The test method adopts Part 3 of GB / T 15825.3-2008 (Forming properties and test methods of sheet metal) for drawing and drawing load test.

[0081] Corrosion resistance: The test method adopts section 5.2 Neutral salt spray test (NSS test) of GB / T 10125-2012 (Artificial atmosphere corrosion test, smoke test).

[0082] Table 1

[0083]

[0084] As can be seen from Table 1, compared with the metal composite plates of Comparative Examples 1-3, the metal composite plates of Examples 1-5 of this application, by adopting a laminated structure of aluminum alloy-magnesium alloy-aluminum alloy and selecting a suitable damping adhesive for composite between aluminum alloy and magnesium alloy, can achieve a higher damping coefficient, i.e., good shock absorption, and also a higher room temperature limit drawing ratio, i.e., good metal machinability. In addition, compared with the pure aluminum alloy of Comparative Example 2, it can also achieve a significant weight reduction effect, meeting the requirements of lightweighting.

[0085] The above description represents the preferred embodiments of this application, but should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A metal composite plate, characterized in that, The metal composite plate comprises a first aluminum alloy layer, a first damping adhesive layer, a magnesium alloy layer, a second damping adhesive layer, and a second aluminum alloy layer stacked sequentially. The materials of the first damping adhesive layer and the second damping adhesive layer are independently selected from any one of nitrile rubber, butyl rubber, and epoxy resin. The thickness of the first damping adhesive layer is 10 μm-30 μm; the thickness of the second damping adhesive layer is 10 μm-30 μm; the thickness of the first aluminum alloy layer and the second aluminum alloy layer is 0.2 mm-0.4 mm; the thickness ratio of the first aluminum alloy layer to the magnesium alloy layer is 1:(2-6); the thickness ratio of the second aluminum alloy layer to the magnesium alloy layer is 1:(2-6); the total thickness of the metal composite plate is 1.4 mm-2.0 mm; the damping coefficient of the metal composite plate is greater than or equal to 0.3; and the room temperature limit drawing ratio of the metal composite plate is greater than or equal to 1.

6.

2. The metal composite plate as described in claim 1, characterized in that, The first damping adhesive layer and the second damping adhesive layer are made of the same material.

3. A method for preparing a metal composite plate as described in claim 1 or 2, characterized in that, include: A magnesium alloy is placed between a first aluminum alloy and a second aluminum alloy. A first damping adhesive is placed between the first aluminum alloy and the magnesium alloy, and a second damping adhesive is placed between the second aluminum alloy and the magnesium alloy. The metal composite plate is then subjected to baking, hot pressing, and curing processes in sequence.

4. The method for preparing the metal composite plate as described in claim 3, characterized in that, The baking temperature is 100℃-200℃, and the baking time is 5 min-10 min.

5. The method for preparing the metal composite plate as described in claim 3 or 4, characterized in that, The hot-pressing composite is rolled, the rolling temperature is 200℃-300℃, the rolling pressure is 2 MPa-10 MPa, and the rolling speed is 2 mm / min-10 mm / min.

6. The method for preparing the metal composite plate as described in claim 3 or 4, characterized in that, The curing temperature is 150℃-200℃, and the curing time is 2 min-10 min.

7. A structural component, characterized in that, The structural component includes the metal composite plate as described in claim 1 or 2, or the metal composite plate prepared by the preparation method as described in any one of claims 3-6.

8. A powertrain system, characterized in that, The powertrain system includes the structural component as described in claim 7.

9. A vehicle, characterized in that, The vehicle includes the powertrain system as described in claim 8.

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