Metal composite plate, preparation method therefor and use thereof

Abstract

The present application provides a metal composite plate, a preparation method therefor and the use thereof. The metal composite plate comprises, successively stacked, 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. The materials of the first damping adhesive layer and the second damping adhesive layer are individually selected from any one of nitrile rubber, butyl rubber and epoxy resin. While exhibiting good shock absorption, the metal composite plate provided in the present application can meet the requirement for lightweight. The metal composite plate also exhibit good corrosion resistance and metal machinability, broadening the application scenarios thereof.

Description

Metal composite plate and preparation method and application thereof

[0001] The present application claims priority to the Chinese patent application No. 2024113802004, filed on September 29, 2024, and entitled "Metal composite plate and preparation method and application thereof", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] 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

[0003] 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.

[0004] 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, which increases the manufacturing cost. SUMMARY

[0005] 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 by adopting the design of the laminated structure of aluminum alloy-magnesium alloy-aluminum alloy and compounding the appropriate damping glue between the aluminum alloy and the magnesium alloy while having good shock absorption, and the metal composite plate also has good corrosion resistance and metal processability, thereby widening the application scenarios thereof.

[0006] 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.

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

[0008] In the embodiment of the present application, the thickness of the second damping adhesive layer is 10-30 microns.

[0009] In the embodiment of the present application, the first damping adhesive layer and the second damping adhesive layer are made of the same material.

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

[0011] 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).

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

[0013] In the embodiment of the present application, the thickness of the second aluminum alloy layer is 0.2-0.4 mm.

[0014] In the embodiment of the present application, the total thickness of the metal composite plate is 1.4-2.0 mm.

[0015] In the embodiment of the present application, the damping coefficient of the metal composite plate is greater than or equal to 0.3.

[0016] In the embodiment of the present application, the room temperature limit drawing ratio of the metal composite plate is greater than or equal to 1.6.

[0017] The second aspect of the present application provides a preparation method of a metal composite plate, comprising:

[0018] Placing the magnesium alloy between the first aluminum alloy and the second aluminum alloy, setting a first damping adhesive between the first aluminum alloy and the magnesium alloy, setting a second damping adhesive between the second aluminum alloy and the magnesium alloy, and sequentially performing baking treatment, hot pressing, and curing treatment to obtain the metal composite plate.

[0019] In the embodiment of the present application, the baking treatment is performed at a temperature of 100-200℃ for 5-10 minutes.

[0020] In the embodiment of the present application, the hot pressing is rolling, the rolling is performed at a temperature of 200-300℃, a pressure of 2-10 MPa, and a speed of 2-10 mm / min.

[0021] In the embodiment of the present application, the curing treatment is performed at a temperature of 150-200℃ for 2-10 minutes.

[0022] The third aspect of the present application provides a structural member, which comprises the metal composite plate provided by the first aspect of the present application or the metal composite plate prepared by the preparation method provided by the second aspect of the present application.

[0023] The fourth aspect of the present application provides a power assembly system, which comprises the structural member provided by the third aspect of the present application.

[0024] 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.

[0025] The metal composite plate provided by the present 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. BRIEF DESCRIPTION OF DRAWINGS

[0026] 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 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.

[0027] FIG. 1 is a schematic view of the cross-sectional structure of the metal composite plate provided by an embodiment of the present application;

[0028] FIG. 2 is a flowchart of the preparation method of the metal composite plate provided by an embodiment of the present application;

[0029] FIG. 3 is a schematic view of the production line of the preparation method of the metal composite plate provided by an embodiment of the present application.

[0030] Legend: 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; 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

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] 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.

[0033] 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 using it 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 surface corrosion resistance due to the main component of steel, which cannot meet the requirements of the body structural parts 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 interlayer peeling strength of the composite metal is low, which cannot meet the stamping forming of complex structural parts.

[0034] 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.

[0035] As shown in FIG. 1, 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. Since the densities of magnesium alloy and aluminum alloy are both less than that of steel material, the metal composite plate obtained by compounding magnesium alloy and aluminum alloy can significantly reduce weight, meeting the requirements of various vibration reduction fields for material lightweight. The density of magnesium alloy is less than that of common metal alloy, and the compounding of magnesium alloy and aluminum alloy can further reduce the overall weight of the metal composite plate compared with pure aluminum alloy. Compared with aluminum alloy and steel, magnesium alloy has higher vibration damping capacity and extremely strong vibration reduction effect. The structural member made of magnesium alloy can meet the demand of vehicle for comfort. In addition, the structure of the metal and glue alternately stacked in the form of "aluminum alloy-damping glue-magnesium alloy-damping glue-aluminum alloy" can also have better vibration reduction effect, effectively relieving the vibration and noise generated during the use of the automobile and improving 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 100 as the exposed surface during use. This is because aluminum alloy has excellent corrosion resistance compared with magnesium alloy. Arranging aluminum alloy as the surface metal layer of the metal composite plate 100 can improve the surface performance of the metal composite plate 100, 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, since the ultimate tensile ratio of the magnesium alloy layer 103 at room temperature is small and the stamping forming performance is poor, it is not conducive to the subsequent forming processing of the magnesium alloy layer at room temperature. By sandwiching the magnesium alloy layer 103 with the first aluminum alloy layer 101 and the second aluminum alloy layer 105, the aluminum alloy can constrain the deformation of the magnesium alloy and reinforce the deformation resistance of the magnesium alloy, improve the ultimate tensile ratio of the metal composite plate 100 at room temperature, and improve the stamping forming performance of the metal composite plate 100 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. On the one hand, 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 100 and the bonding performance of the whole metal composite plate layer, avoid the peeling and falling off between the aluminum alloy and the magnesium alloy during the subsequent processing such as stamping, and on the other hand, the adhesion and buffering effect of the damping glue can effectively relieve 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 100, facilitate the subsequent forming processing and broaden the application scenarios.

[0036] In the embodiments of the present application, the metal composite plate can be a metal processing raw material, and can be subsequently formed into a corresponding product according to actual use requirements. In the embodiments of the present application, the shape of the metal composite plate is not required, and the shape of the metal composite plate includes but is not limited to a thick plate, a foil, and a strip (coiled material) according to different use requirements.

[0037] In the embodiments of the present application, the thickness of the first damping adhesive layer 102 is 10 μm-30 μm, and the thickness of the second damping adhesive layer 104 is 10 μm-30 μm. In some embodiments of the present application, the thickness of the first damping adhesive layer 102 can be, for example, 10 μm, 12 μm, 14 μm, 15 μm, 16 μm, 18 μm, 20 μm, 22 μm, 24 μm, 25 μm, 26 μm, 28 μm, or 30 μm, and the thickness of the second damping adhesive layer 104 can be, for example, 10 μm, 12 μm, 14 μm, 15 μm, 16 μm, 18 μm, 20 μm, 22 μm, 24 μm, 25 μm, 26 μm, 28 μm, or 30 μm. By controlling the thickness of the damping adhesive layer within a suitable range, the present application ensures that the damping adhesive layer effectively bonds the aluminum alloy layer and the magnesium alloy layer, and also does not affect the mechanical properties of the metal composite plate, so that the metal composite plate has good mechanical properties and overall bonding.

[0038] In the embodiments of the present application, the thickness of the first damping adhesive layer 102 and the thickness of the second damping adhesive layer 104 can be the same or different. In some embodiments of the present 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 thickness of the first damping adhesive layer and the second damping adhesive layer within a relatively close range, the mechanical uniformity of the overall metal composite plate can be further improved.

[0039] In the embodiments of the present application, the material of the first damping adhesive layer 102 is selected from any one of nitrile rubber, butyl rubber, and epoxy resin, the material of the second damping adhesive layer 104 is selected from any one of nitrile rubber, butyl rubber, and epoxy resin, and the materials of the first damping adhesive layer 102 and the second damping adhesive layer 104 can be the same or different. By considering the characteristics of the aluminum alloy and the magnesium alloy to be combined, the present application selects a suitable damping adhesive, which has advantages such as viscoelasticity, oil resistance, aging resistance, and high damping ratio. The use of the above damping adhesives to prepare the first damping adhesive layer and the second damping adhesive layer can effectively absorb and dissipate vibration energy. By selecting a suitable damping adhesive, the bonding force between the layers of the metal composite plate can be improved, and the subsequent processing performance of the metal composite plate can be improved. In some embodiments of the present application, the materials of the first damping adhesive layer 102 and the second damping adhesive layer 104 are the same, and the use of the same material for the two damping layers can further improve the mechanical uniformity of the overall metal composite plate.

[0040] In some 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 the magnesium alloy within a suitable range, the application can maximize the use of magnesium alloy to reduce the weight of the metal composite plate and improve its damping coefficient while ensuring that the metal composite plate has good mechanical properties and corrosion resistance of the aluminum alloy.

[0041] In some embodiments, the thickness of the first aluminum alloy layer 101 can be, for example, 0.2 mm, 0.22 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.28 mm, 0.3 mm, 0.32 mm, 0.34 mm, 0.35 mm, 0.36 mm, 0.38 mm, or 0.4 mm, and the thickness of the second aluminum alloy layer 105 can be, for example, 0.2 mm, 0.22 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.28 mm, 0.3 mm, 0.32 mm, 0.34 mm, 0.35 mm, 0.36 mm, 0.38 mm, or 0.4 mm. By controlling the thickness of the aluminum alloy layer within a suitable range, the application can ensure that the metal composite plate has good surface corrosion resistance and good mechanical properties. In some embodiments, the thickness of the first aluminum alloy layer 101 and the second aluminum alloy layer 105 can be the same or different. In some 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 is less than or equal to 0.2 nm. In some 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 less than or equal to 0.1 nm. In some 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 thickness of the first aluminum alloy layer and the second aluminum alloy layer within a relatively close range, the mechanical uniformity of the metal composite plate as a whole can be further improved.

[0042] In some embodiments, the total thickness of the metal composite panel 100 can be, for example, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm.

[0043] In some embodiments, the damping coefficient of the metal composite panel 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, 0.6.

[0044] In some embodiments, the metal composite panel 100 has a room temperature limit drawing ratio of greater than or equal to 1.6. The room temperature limit drawing ratio of the metal composite panel 100 can be measured by a drawing test at room temperature. The drawing test, also known as deep drawing test, is a simulation forming test method for evaluating the drawing performance of a material. The drawing performance refers to the ability of a metal sheet to resist cracking at the flange main deformation zone during drawing forming without wrinkling. In the present application, the drawing test mainly refers to the Swift cupping test, which is a test method for evaluating the drawing performance of a sheet metal by using the limit drawing ratio. During the test, the metal composite panel with different diameters is placed in a mold and tested under specified conditions to determine the maximum blank diameter (D0) of the drawing formed part without cracking. max The ratio of the diameter of the metal composite panel to the diameter of the punch p is called the limit drawing ratio, denoted as LDR, i.e., LDR = (D0) max / d p . The larger the LDR value, the better the drawing performance of the corresponding sheet metal. In some embodiments, the room temperature limit drawing ratio of the metal composite panel 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, 2.5.

[0045] The metal composite plate provided by the application is obtained by adopting two aluminum alloy layers to sandwich a magnesium alloy layer and selecting appropriate damping glue to bond the magnesium alloy layer and the aluminum alloy layer, and thus the metal composite plate has good shock resistance, meets the lightweight requirement, has good corrosion resistance and metal processability, and widens the application scenarios.

[0046] The application further provides a preparation method of the metal composite plate provided in the foregoing.

[0047] The magnesium alloy is arranged between the first aluminum alloy and the second aluminum alloy, the first damping glue is arranged between the first aluminum alloy and the magnesium alloy, the second damping glue is arranged between the second aluminum alloy and the magnesium alloy, and the baking treatment, the hot-pressing compounding and the curing treatment are sequentially performed to obtain the metal composite plate.

[0048] In some specific embodiments, the flowchart of the preparation method of the metal composite plate is shown in FIG. 2, and the method comprises the following steps.

[0049] S101, the magnesium alloy is arranged between the first aluminum alloy and the second aluminum alloy, the first damping glue is coated on the bonding surface of the first aluminum alloy to be combined with the magnesium alloy, and the baking treatment is performed, and the second damping glue is coated on the bonding surface of the second aluminum alloy to be combined with the magnesium alloy, and the baking treatment is performed.

[0050] S102, the first aluminum alloy coated with the first damping glue, the magnesium alloy and the second aluminum alloy coated with the second damping glue are subjected to the hot-pressing compounding, and then the curing treatment is performed to obtain the metal composite plate.

[0051] In some embodiments of the application, the shapes of the magnesium alloy, the first aluminum alloy, the second aluminum alloy and the metal composite plate 100 include but are not limited to plate, strip and foil, and the hot-pressing compounding mode is rolling. In step S101, the magnesium alloy is arranged between the first aluminum alloy and the second aluminum alloy, and specifically, the first aluminum alloy, the magnesium alloy and the second aluminum alloy can be sequentially stacked in the thickness direction.

[0052] The preparation method of the metal composite plate 100 is described in detail below taking this case as an example, and the specific production line schematic diagram is shown in FIG. 3. In step S101, the magnesium alloy 21 is arranged between the first aluminum alloy 11 and the second aluminum alloy 31, and the first aluminum alloy 11, the magnesium alloy 21 and the second aluminum alloy 31 are obtained by unwinding the first aluminum roll 1, the magnesium roll 2 and the second aluminum roll 3. After unwinding, the first aluminum alloy 11 passes through the first roller coating device 8 to coat the first damping glue, the coating surface is the bonding surface to be combined with the magnesium alloy 21, and after coating, the first aluminum alloy 11 and the magnesium alloy 21 are simultaneously conveyed to the first baking treatment device 5 for baking treatment; at the same time, the second aluminum alloy 31 passes through the second roller coating device 9 to coat the second damping glue, the coating surface is the bonding surface to be combined with the magnesium alloy 21, and after coating, the second aluminum alloy 31 is conveyed to the second baking treatment device 6 for baking treatment.

[0053] In step S101, the first damping glue includes any one of nitrile rubber, butyl rubber and epoxy resin; the second damping glue includes any one of nitrile rubber, butyl rubber and epoxy resin.

[0054] In the embodiments of the present application, the first damping glue and the second damping glue 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 content of the solvent in the first damping glue and the second damping glue is 30%-70%. The present application can help the first damping glue and the second damping glue to fully dissolve the components by selecting a suitable solvent and controlling the content of the solvent within a suitable range, thereby improving the uniformity of the first damping glue and the second damping glue. In some specific embodiments of the present application, the curing agent includes one or more of substituted urea, ethylenediamine, dicyandiamide and polyamide; the mass percentage content of the curing agent in the first damping glue and the second damping glue is 1%-10%. The present application can further improve the bonding force between the damping glue and the metal plate (aluminum alloy and magnesium alloy) by selecting a suitable curing agent and controlling the content of the curing agent within a suitable range.

[0055] In the embodiments of the present application, the temperature of the baking treatment is 100°C-200°C, and the time of the baking treatment is 5min-10min. In some specific embodiments, the temperature of the baking treatment may, for example, be 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, 190°C or 200°C; the time of the baking treatment may, for example, be 5min, 6min, 7min, 8min, 9min or 10min. The present application can ensure that the solvent in the damping glue is removed as much as possible by controlling the temperature and time of the baking treatment within a suitable range.

[0056] In step S102, the hot-pressing compounding is rolling. In some embodiments, the rolling can be hot rolling. The first aluminum alloy 11 coated with the first damping glue, the magnesium alloy 21 and the second aluminum alloy 31 coated with the second damping glue are sequentially conveyed to the hot-pressing compounding device 10 in the order of sequentially stacking for rolling hot-pressing compounding. In some embodiments of the present application, the number of rolling rolls may, for example, be 3 pairs. By controlling the number of rolling rolls to be 3 pairs, the effect of the rolling hot-pressing compounding can be further improved. Controlling the number of rolling rolls can on the one hand better remove the excess gas in the damping glue during the hot-pressing compounding process; on the other hand, it can also better complete the infiltration and pre-solidification of the damping glue to the metal plate (aluminum alloy and magnesium alloy), thereby facilitating the subsequent curing treatment.

[0057] In the embodiments of the present application, the rolling temperature is 200-300 DEG C, the pressure is 2-10 MPa, and the rolling speed is 2-10 mm / min. In some specific embodiments, the rolling temperature can be, for example, 200 DEG C, 210 DEG C, 220 DEG C, 230 DEG C, 240 DEG C, 250 DEG C, 260 DEG C, 270 DEG C, 280 DEG C, 290 DEG C, or 300 DEG C; the rolling pressure can be, for example, 2 MPa, 3 MPa, 4 MPa, 5 MPa, 6 MPa, 7 MPa, 8 MPa, 9 MPa, or 10 MPa; and the rolling speed can be, for example, 2 mm / min, 3 mm / min, 4 mm / min, 5 mm / min, 6 mm / min, 7 mm / min, 8 mm / min, 9 mm / min, or 10 mm / min. The hot-pressing compounding is a prerequisite for subsequent curing treatment, and by controlling the relevant parameters of the hot-pressing treatment within a suitable range, the damping glue can be made to better infiltrate the aluminum alloy and the magnesium alloy, and the bonding force between the layers of the metal composite plate can be further improved.

[0058] In the embodiments of the present application, after the hot-pressing compounding, the metal composite plate 100 is obtained by being conveyed into the curing treatment device 7 for curing treatment, and the metal composite roll 4 is obtained after winding. In the embodiments of the present application, the curing treatment temperature is 150-200 DEG C, and the curing treatment time is 2-10 min. In some specific embodiments, the curing treatment temperature can be, for example, 150 DEG C, 160 DEG C, 170 DEG C, 180 DEG C, 190 DEG C, or 200 DEG C; and the curing treatment time can be, for example, 2 min, 3 min, 4 min, 5 min, 6 min, 7 min, 8 min, 9 min, or 10 min. The curing treatment can make the damping glue solidify to form a damping glue layer, and thus the bonding force between the layers of the metal composite plate can be improved.

[0059] The preparation method of the metal composite plate provided by the present application has a simple process flow, does not need to perform redundant surface treatment, reduces the production cost, and has good bonding performance between the layers of the metal composite plate, light overall quality of the metal composite plate, good damping effect, good corrosion resistance, and good forming processing performance, and thus the metal composite plate can be conveniently processed as a raw material to obtain a structural member.

[0060] The present application also provides a structural member, which comprises the metal composite plate provided in the foregoing or prepared by the preparation method provided in the foregoing. In the embodiments of the present application, the structural member includes but is not limited to an electric control box, a vehicle-mounted power supply box, a controller shell, a transmission assembly box, an electric drive shell, and a battery pack tray.

[0061] The present application also provides a power assembly system, at least one component of which adopts the structural member provided in the foregoing.

[0062] The application also provides a vehicle comprising the powertrain system provided in the foregoing.

[0063] The effects of the technical solutions of the application are further described below through specific examples.

[0064] Embodiment 1

[0065] As shown in FIG. 3, first aluminum roll 1, magnesium roll 2 and second aluminum roll 3 are unwound first, and nitrile rubber damping glue is used to roll coat first roller coating device 8 and second roller coating device 9; first baking treatment device 5 and second baking treatment device 6 are used to bake magnesium roll 2 and the aluminum roll after roll coating, respectively, the baking temperature is 200℃, and the baking time is 10min; then hot-pressing composite device 10 is used to hot-press composite the aluminum roll and the magnesium roll after baking (from top to bottom, the order is aluminum roll with damping glue layer, magnesium roll, aluminum roll with damping glue layer), the rolling temperature is 200℃, the rolling pressure is 5MPa, and the rolling speed is 5mm / min; finally, solidification treatment device 7 is used to solidify the metal plate after hot-pressing composite, to obtain metal composite plate 100, the solidification treatment temperature is 150℃, the solidification treatment time is 10min, and after winding, metal composite roll 4 is obtained. In the metal composite plate prepared in this embodiment, the first aluminum alloy layer is 5052-O aluminum alloy, the thickness is 0.1mm; the magnesium alloy layer is AZ31 magnesium alloy, the thickness is 1.4mm; and the second aluminum alloy layer is 5052-O aluminum alloy, the thickness is 0.1mm.

[0066] Embodiment 2

[0067] The difference from embodiment 1 is that the thickness of the first aluminum alloy layer is 0.2mm, the thickness of the magnesium alloy layer is 1.2mm, and the thickness of the second aluminum alloy layer is 0.2mm.

[0068] Embodiment 3

[0069] The difference from embodiment 1 is that the thickness of the first aluminum alloy layer is 0.3mm, the thickness of the magnesium alloy layer is 1.0mm, and the thickness of the second aluminum alloy layer is 0.3mm.

[0070] Embodiment 4

[0071] The difference from embodiment 1 is that the thickness of the first aluminum alloy layer is 0.4mm, the thickness of the magnesium alloy layer is 0.8mm, and the thickness of the second aluminum alloy layer is 0.4mm.

[0072] Embodiment 5

[0073] The difference from embodiment 1 is that the thickness of the first aluminum alloy layer is 0.5mm, the thickness of the magnesium alloy layer is 0.6mm, and the thickness of the second aluminum alloy layer is 0.5mm.

[0074] Comparative Example 1

[0075] The difference from Example 1 is that in the metal composite plate prepared in the comparative example, the first aluminum alloy layer is replaced by an AZ31 magnesium alloy with a thickness of 0.1 mm, and the second aluminum alloy layer is replaced by an AZ31 magnesium alloy with a thickness of 0.1 mm.

[0076] Comparative Example 2

[0077] The difference from Example 1 is that in the metal composite plate prepared in the comparative example, the magnesium alloy layer is replaced by a 5052-O aluminum alloy with a thickness of 1.4 mm.

[0078] Comparative Example 3

[0079] The difference from Example 1 is that in the metal composite plate prepared in the comparative example, there is no second aluminum alloy layer.

[0080] Performance detection

[0081] Examples 1-5 and Comparative Examples 1-3 were tested for performance, and the results are shown in Table 1.

[0082] Damping coefficient: cantilever beam method, test equipment is a vibration damping characteristic test analyzer, test standard is ASTM E756-05 (Standard Test Method for Measuring Damping Characteristics of Materials in Vibrations).

[0083] Normal temperature limit drawing ratio: the test method adopts the drawing and drawing load test part in Part 3 of GB / T 15825.3-2008 (Metal Sheet Forming Performance and Test Method).

[0084] Corrosion resistance: the test method adopts the neutral salt spray test (NSS test) part in 5.2 of GB / T 10125-2012 (Artificial Atmosphere Corrosion Test Smoke Test).

[0085] Table 1

[0086] 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 the application can have a higher damping coefficient, i.e. good shock absorption, and also have a higher normal temperature limit drawing ratio, i.e. good metal processing property, by using the design of the laminated structure of aluminum alloy-magnesium alloy-aluminum alloy and the appropriate damping glue between the aluminum alloy and the magnesium alloy. In addition, compared with the pure aluminum alloy of Comparative Example 2, it can also significantly reduce the weight and meet the demand for light weight.

[0087] The above describes the preferred embodiments of the present application, but should not be construed as limiting the scope of the present application. It should be pointed out that, for those skilled in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements are also considered within the scope of protection of the present application.

Claims

1. A metal composite panel, wherein, 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.

2. The metal composite panel of claim 1, wherein, The thickness of the first damping glue layer is 10-30 microns; and / or the thickness of the second damping glue layer is 10-30 microns.

3. The metal composite panel of claim 1 or 2, wherein, The material of the first damping glue layer and the second damping glue layer is the same.

4. The metal composite panel of any one of claims 1-3, wherein, The thickness ratio of the first aluminum alloy layer to the magnesium alloy layer is 1:(2-6); and / or the thickness ratio of the second aluminum alloy layer to the magnesium alloy layer is 1:(2-6).

5. The metal composite panel of any of claims 1-4, wherein, The thickness of the first aluminum alloy layer is 0.2-0.4 mm; and / or the thickness of the second aluminum alloy layer is 0.2-0.4 mm; and / or the total thickness of the metal composite plate is 1.4-2.0 mm.

6. The metal composite panel of any of claims 1-5, wherein, The damping coefficient of the metal composite plate is greater than or equal to 0.3; and / or the normal temperature limit deep drawing ratio of the metal composite plate is greater than or equal to 1.

6.

7. A method of producing a metal composite sheet as claimed in any one of claims 1 to 6, wherein, Comprising: The magnesium alloy is arranged between the first aluminum alloy and the second aluminum alloy, the first damping glue is arranged between the first aluminum alloy and the magnesium alloy, the second damping glue is arranged between the second aluminum alloy and the magnesium alloy, and the baking treatment, the hot pressing composite and the curing treatment are sequentially performed to obtain the metal composite plate.

8. The method of producing a metal composite sheet according to claim 7, wherein The temperature of the baking treatment is 100-200 DEG C, and the time of the baking treatment is 5-10 minutes.

9. The method of producing a metal composite sheet according to claim 7 or 8, wherein The hot pressing composite is rolling, the temperature of the rolling is 200-300 DEG C, the pressure of the rolling is 2-10 MPa, and the speed of the rolling is 2-10 mm / min.

10. The method of producing a metal composite sheet according to any one of claims 7 to 9, wherein The temperature of the curing treatment is 150-200 DEG C, and the time of the curing treatment is 2-10 minutes.

11. A structural member wherein, The structural member comprises the metal composite plate of any one of claims 1-6 or the metal composite plate prepared by the preparation method of any one of claims 7-10.

12. A powertrain system, wherein, The power assembly system comprises the structural member of claim 11.

13. A vehicle, wherein, The vehicle comprises the power assembly system of claim 12. The vehicle comprises the power assembly system of claim 12.

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