Layered aluminum-based composite board and preparation method thereof

Abstract

The invention discloses a layered aluminum-based composite board and a preparation method thereof, and belongs to the technical field of aluminum-based composites.The preparation method comprises the steps that a first aluminum material and a second aluminum material are subjected to solution treatment, internal stress of the aluminum materials is eliminated, alloy elements in the second aluminum material are completely subjected to solution treatment into crystal lattices of aluminum, roughening treatment is conducted, and a pretreated first aluminum material and a pretreated second aluminum material are obtained; and the first pretreated aluminum material, the second pretreated aluminum material and the second pretreated aluminum material are stacked, heated, rolled for the first time and cooled, and the layered aluminum-based composite board is obtained. The layered aluminum-based composite material plate prepared through the method is good in interface bonding and meanwhile has the good comprehensive mechanical property. The first aluminum material and the second aluminum material are both aluminum alloys and have good compatibility, so that no oxide layer is formed at the interface bonding position of the plate, and the bonding quality at the interface position is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum-based composite materials, and in particular to a layered aluminum-based composite plate and a preparation method thereof. Background Art

[0002] Aluminum and aluminum alloy materials have excellent comprehensive properties, high specific strength, good plasticity and processing properties, so they are widely used in industry, such as aerospace, automobiles, bridges, construction, energy and power, metallurgy and chemical industry, machinery manufacturing and other fields. However, industrial pure aluminum has disadvantages such as low strength, active chemical properties, and easy formation of oxide layer on the surface, which seriously limits its application. Compared with pure aluminum materials, aluminum-based composite plates have better high temperature performance, wear resistance, oxidation resistance, corrosion resistance, etc., and have been widely used in military, aviation, aerospace and civil fields.

[0003] Ultrafine grain structures can be prepared in metal materials by large plastic deformation. Such structures can make the materials have both high strength and high plasticity. Therefore, the preparation of composite materials by large plastic deformation has attracted much attention. The existing large plastic deformation methods mainly include equal channel angular extrusion, high pressure torsion method and cumulative rolling method. The cumulative rolling method is a method of preparing metal sheets with ultrafine grain structures using traditional rolling equipment. It has the advantages of simple preparation method, low equipment requirements, low cost, short production cycle, easy industrialization, and easy performance control. It is a relatively mature method for preparing layered aluminum-based composite materials. The cumulative rolling method can introduce a large number of dislocations and substructures into the material to achieve the effect of grain refinement, realize dislocation strengthening and grain boundary strengthening, and improve the comprehensive mechanical properties of the material. However, there are also certain problems in the process of preparing materials by the cumulative rolling method: as the number of rolling cycles increases, the number of interfaces increases, so there is a loose bond, which reduces the mechanical properties of the material; metal plates fixed with rivets have inconsistent deformation of heterogeneous plates and poor coordination during the rolling process, and interface cracking occurs, which reduces the mechanical properties of the material; in order to improve the plastic deformation capacity of the plate, the material is preheated before rolling, and during this process, oxides may be formed at the bonding surface, thereby affecting the interface bonding quality and the mechanical properties of the material. Summary of the invention

[0004] In view of the above problems, the present invention provides a layered aluminum-based composite plate and a method for preparing the same, which effectively solves the technical problems of plate interface cracking, loose bonding, oxide formation at the bonding interface during rolling treatment, and affecting the interface bonding quality and material properties when composite materials are prepared by cumulative rolling process, and at the same time provides a layered aluminum-based composite plate with excellent mechanical properties.

[0005] The first object of the present invention is to provide a method for preparing a layered aluminum-based composite sheet, comprising the following steps:

[0006] The first aluminum material and the second aluminum material are solution treated at 480° C. to 540° C. to eliminate the internal stress of the aluminum material and completely dissolve the alloy elements in the second aluminum material into the aluminum lattice, and roughened to obtain the pretreated first aluminum material and the pretreated second aluminum material.

[0007] The pretreated first aluminum material is used as the surface layer, and the pretreated second aluminum material is used as the core layer, which are stacked in a structure of surface layer-core layer-surface layer, heated at 380° C. to 420° C., rolled once, and cooled to obtain a layered aluminum-based composite plate.

[0008] As a preferred embodiment, after one rolling is completed, a single rolled plate is obtained, which is roughened, cut and stacked, and rolled again at 350°C to 450°C.

[0009] As a preferred embodiment, after the second rolling is completed, a secondary rolled plate is obtained, the secondary rolled plate is cut and stacked, and rolled at 350° C. to 450° C., and the rolling process is repeated 1 to 3 times.

[0010] As a preferred implementation, the speed of the first rolling and the second rolling is 0.4 m / s, and the reduction amount of each rolling is 50%.

[0011] As a preferred implementation, the first aluminum material is 1061Al, 1050Al, 1070Al or 1100Al; the second aluminum material is 6061Al, 6060Al, 6063Al or 6463Al.

[0012] As a preferred embodiment, the solution treatment time is 30 min to 60 min.

[0013] As a preferred implementation manner, the heating time is 10 min to 20 min.

[0014] As a preferred implementation manner, the roughening treatment specifically includes: grinding with sandpaper with a mesh number ≤ 80, and then washing with ultrasonic acetone.

[0015] As a preferred implementation, before the roughening treatment, the oxide film and oil stains on the surface of the aluminum material are removed; after the roughening treatment, the surface roughness of the plate is ≥ Ra3.2.

[0016] The second object of the present invention is to provide a layered aluminum-based composite sheet prepared by the above-mentioned method for preparing the layered aluminum-based composite sheet.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a layered aluminum-based composite plate and a preparation method thereof. First, a first aluminum material and a second aluminum material are subjected to a solid solution treatment at 480°C to 540°C to eliminate the internal stress of the aluminum material, and the alloy elements in the second aluminum material are completely dissolved into the aluminum lattice. On the one hand, the plastic deformation capacity of the material is improved to prevent the sample from breaking due to excessive deformation. On the other hand, since the deformation capacity of the second aluminum material is poor compared with that of the first aluminum material, the deformation coordination of the two aluminum materials can be effectively improved after the solid solution treatment. Then, a roughening treatment is performed to obtain a pretreated first aluminum material and a pretreated second aluminum material, which can not only improve the friction between the aluminum plates and improve the deformation coordination of plates of different materials, but also increase the contact area of ​​the interface, promote atomic diffusion during hot rolling, and achieve metallurgical bonding, thereby improving the interface bonding quality. The pretreated first aluminum material, the pretreated second aluminum material and the pretreated first aluminum material are stacked, heated at 380°C to 420°C, rolled once, and cooled to obtain a layered aluminum-based composite plate. During hot rolling, the material will gradually soften, improving its deformation capacity; under the combined effects of temperature and pressure, atoms are more likely to diffuse at the interface, achieving metallurgical bonding and thus improving the interface quality; dynamic recovery and dynamic recrystallization occur during hot rolling, thereby achieving grain refinement and improving the comprehensive mechanical properties of the material.

[0019] The preparation method of the layered aluminum-based composite plate of the present invention is simple, low in cost, and short in production cycle. The prepared layered aluminum-based composite plate has good interface bonding and good comprehensive mechanical properties. Since the first aluminum material and the second aluminum material are both aluminum alloys and have good compatibility, there is no oxide layer at the interface bonding of the plate, thereby improving the bonding quality at the interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the layered aluminum-based composite plate prepared in Example 1 of the present invention.

[0021] Figure 2 It is a cross-sectional view of the layered aluminum-based composite plate prepared in Example 2 of the present invention.

[0022] Figure 3 It is a cross-sectional view of the layered aluminum-based composite plate prepared in Example 3 of the present invention.

[0023] Figure 4 It is a cross-sectional view of the layered aluminum-based composite plate prepared in Example 4 of the present invention.

[0024] Figure 5 It is a cross-sectional view of the layered aluminum-based composite plate prepared in Example 5 of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention and implement it, the present invention is further described below in conjunction with specific examples, but the examples are not intended to limit the present invention. The following test methods and detection methods, unless otherwise specified, are conventional methods; the reagents and raw materials, unless otherwise specified, are commercially available.

[0026] Regarding the existing preparation methods of composite aluminum materials: Although the cumulative rolling method can introduce a large number of dislocations and substructures into the material, achieve the effect of grain refinement, realize dislocation strengthening and grain boundary strengthening, and improve the comprehensive mechanical properties of the material, there are also certain problems in the process of preparing materials by the cumulative rolling method. First, due to the increase in the number of rolling cycles, the number of interfaces increases, resulting in loose interface bonding, thereby reducing the mechanical properties of the material; second, the metal plates fixed with rivets during the rolling process have inconsistent deformation and poor coordination of heterogeneous plates, resulting in interface cracking, which reduces the mechanical properties of the material; third, although preheating the material before rolling can improve the plastic deformation capacity of the plate, this will cause oxides to form at the bonding surface, affecting the interface bonding quality and the mechanical properties of the material. Based on the above technical problems, the present invention provides a layered aluminum-based composite plate and a preparation method thereof.

[0027] The technical solution of the present invention is described in detail below.

[0028] The present invention first provides a method for preparing a layered aluminum-based composite plate, comprising the following steps:

[0029] The first aluminum material and the second aluminum material are solution treated at 480° C. to 540° C. to eliminate the internal stress of the aluminum material and completely dissolve the alloy elements in the second aluminum material into the aluminum lattice, and roughened to obtain the pretreated first aluminum material and the pretreated second aluminum material.

[0030] The first aluminum material is 1061Al, 1050Al, 1070Al or 1100Al; the second aluminum material is 6061Al, 6060Al, 6063Al or 6463Al.

[0031] The pretreated first aluminum material is used as the surface layer, and the pretreated second aluminum material is used as the core layer, which are stacked in a structure of surface layer-core layer-surface layer, heated at 380° C. to 420° C., rolled once, and cooled to obtain a layered aluminum-based composite plate.

[0032] In the above technical scheme, after solution treatment and roughening treatment, the first aluminum alloy plate and the second aluminum alloy plate with fresh surfaces are obtained, which are then stacked together in a sandwich manner and then cumulatively rolled, which effectively promotes atomic diffusion between the first aluminum alloy plate and the second aluminum alloy plate, so that they are interlocked with each other to achieve the effect of metallurgical bonding; at the same time, hot rolling reduces the internal stress of the plate, eliminates work hardening, and causes dynamic recovery and dynamic recrystallization of the grains, thereby refining the grains, achieving good bonding of the plates, avoiding oxidation of the bonding surface, improving the bonding of the alloy interface, and optimizing the comprehensive performance of the material.

[0033] It should be noted that for the solution treatment temperature specified in the above scheme, if the solution temperature of 6061 aluminum alloy is lower than 480℃, the second phase in the alloy cannot be completely decomposed, and the alloy elements cannot be completely dissolved into the Al lattice. The purpose of heating rolling at 380℃ to 420℃ is to eliminate the work hardening caused by rolling as much as possible. This temperature range is suitable for hot working and can ensure the plasticity and bonding properties of the material.

[0034] In order to further improve the performance of the composite plate, after one rolling is completed, a single rolled plate is obtained, which is roughened, cut and stacked, and rolled again at 380°C to 420°C.

[0035] In order to achieve good bonding between the layers of the multi-layer aluminum-based composite plate and straighten the rolled plate, after the second rolling is completed, a secondary rolled plate is obtained, the secondary rolled plate is cut and stacked, and rolled at 350°C to 450°C, and the rolling treatment is repeated 1 to 3 times.

[0036] In order to ensure the thickness of the layered aluminum-based composite sheet after multiple rolling, the speed of the first rolling and the second rolling is 0.4 m / s, and the reduction amount of each rolling is 50%.

[0037] In order to ensure the performance of the plate after solution treatment, the solution treatment time is 30 minutes to 60 minutes.

[0038] In order to fully eliminate work hardening and ensure the plasticity and bonding properties of the material, the heating time is 10 minutes to 20 minutes.

[0039] In order to increase the bonding area of ​​the bonding interface and thus improve the bonding strength of the interface, the roughening treatment specifically includes: grinding with sandpaper with a mesh number of ≤80, and then washing with ultrasonic acetone.

[0040] In order to further ensure the interfacial bonding strength of the layered aluminum-based sheet material, the oxide film and oil stains on the surface of the aluminum material are removed before the roughening treatment; after the roughening treatment, the surface roughness of the sheet material is ≥Ra3.2.

[0041] The present invention is specifically described below by means of the following examples and comparative examples.

[0042] Example 1

[0043] A method for preparing a layered aluminum-based composite plate comprises the following steps:

[0044] (1) Two 1060 industrial pure aluminum plates and one 6061 aluminum alloy plate were kept at 520°C for 45 minutes, and then cleaned with acetone and surface polished.

[0045] (2) Stack the 6061 aluminum alloy plate between two 1060Al plates.

[0046] (3) The stacked composite sheet with a thickness of 4.2 mm was placed in a muffle furnace and heated at 400° C. for 15 minutes, then single-pass rolled and cooled to room temperature.

[0047] (4) After a single-pass rolling and welding, the sample was rolled into a 6061Al / 1060Al layered composite material with a thickness of 2.1 mm. The cross-sectional view is shown in FIG. Figure 1 The rolling speed and the single-pass reduction during the rolling process are 0.4 m / s and 50% respectively.

[0048] Example 2

[0049] A method for preparing a layered aluminum-based composite plate comprises the following steps:

[0050] (1) Two 1060 industrial pure aluminum plates and one 6061 aluminum alloy plate were kept at 520°C for 45 minutes, and then cleaned with acetone and surface polished.

[0051] (2) Stack the 6061 aluminum alloy plate between two 1060Al plates.

[0052] (3) The stacked composite sheet with a thickness of 4.2 mm was placed in a muffle furnace and heated at 400° C. for 15 minutes, then single-pass rolled and cooled to room temperature.

[0053] (4) The composite sheet rolled in the first pass was cut in the middle, cleaned with acetone and roughened by surface grinding, and then stacked and fixed and placed in a muffle furnace at 400° C. for 15 minutes for the second pass rolling.

[0054] (5) After the second rolling and welding, the sample was rolled into a 6061Al / 1060Al layered composite material with a thickness of 2.1 mm. The cross-sectional view is shown in the figure. Figure 2 The rolling speed and the single-pass reduction during the rolling process are 0.4 m / s and 50% respectively.

[0055] Example 3

[0056] A method for preparing a layered aluminum-based composite plate comprises the following steps:

[0057] (1) Two 1060 industrial pure aluminum plates and one 6061 aluminum alloy plate were kept at 520°C for 45 minutes, and then cleaned with acetone and surface polished.

[0058] (2) Stack the 6061 aluminum alloy plate between two 1060Al plates.

[0059] (3) The stacked composite sheet with a thickness of 4.2 mm was placed in a muffle furnace and heated at 400° C. for 15 minutes, then single-pass rolled and cooled to room temperature.

[0060] (4) The composite sheet after each rolling process is cut in the middle, cleaned with acetone and roughened by surface grinding, and then stacked and fixed and placed in a muffle furnace at 400° C. for 15 minutes for the second rolling process.

[0061] (5) Repeat step (4) and after three passes of rolling and welding, the sample is rolled into a 6061Al / 1060Al layered composite material with a thickness of 2.1 mm. The cross-sectional view is shown in FIG. Figure 3 The rolling speed and the single-pass reduction during the rolling process are 0.4 m / s and 50% respectively.

[0062] Example 4

[0063] A method for preparing a layered aluminum-based composite plate comprises the following steps:

[0064] (1) Two 1060 industrial pure aluminum plates and one 6061 aluminum alloy plate were kept at 520°C for 45 minutes, and then cleaned with acetone and surface polished.

[0065] (2) Stack the 6061 aluminum alloy plate between two 1060Al plates.

[0066] (3) The stacked composite sheet with a thickness of 4.2 mm was placed in a muffle furnace and heated at 400° C. for 15 minutes, then single-pass rolled and cooled to room temperature.

[0067] (4) The composite sheet after each rolling process is cut in the middle, cleaned with acetone and roughened by surface grinding, and then stacked and fixed and placed in a muffle furnace at 400° C. for 15 minutes for the second rolling process.

[0068] (5) Repeat step (4) and after 5 passes of rolling and welding, the sample is rolled into a 6061Al / 1060Al layered composite material with a thickness of 2.1 mm. The cross-sectional view is shown in FIG. Figure 4 The rolling speed and the single-pass reduction during the rolling process are 0.4 m / s and 50% respectively.

[0069] Example 5

[0070] A method for preparing a layered aluminum-based composite plate comprises the following steps:

[0071] (1) Two 1060 industrial pure aluminum plates and one 6061 aluminum alloy plate were kept at 520°C for 45 minutes, and then cleaned with acetone and surface polished.

[0072] (2) Stack the 6061 aluminum alloy plate between two 1060Al plates.

[0073] (3) The stacked composite sheet with a thickness of 4.2 mm was placed in a muffle furnace and heated at 400° C. for 15 minutes, then single-pass rolled and cooled to room temperature.

[0074] (4) The composite sheet after each rolling process is cut in the middle, cleaned with acetone and roughened by surface grinding, and then stacked and fixed and placed in a muffle furnace at 400° C. for 15 minutes for the second rolling process.

[0075] (5) Repeat step (4) and after 7 passes of rolling and welding, the sample is rolled into a 6061Al / 1060Al layered composite material with a thickness of 2.1 mm. The cross-sectional view is shown in FIG. Figure 5 The rolling speed and the single-pass reduction during the rolling process are 0.4 m / s and 50% respectively.

[0076] In order to further illustrate the effect of the present invention, the present invention also sets a comparative example, as follows:

[0077] Comparative Example 1

[0078] Compared with Example 1, the difference is that the 1060 industrial pure aluminum plate and the 6061 aluminum alloy plate are not subjected to solid solution treatment.

[0079] A method for preparing a layered aluminum-based composite plate comprises the following steps:

[0080] (1) Two 1060 industrial pure aluminum plates and one 6061 aluminum alloy plate were cleaned with acetone and surface polished respectively.

[0081] (2) Stack the 6061 aluminum alloy plate between two 1060Al plates.

[0082] (3) The stacked composite sheet with a thickness of 4.2 mm was placed in a muffle furnace and heated at 400° C. for 15 minutes, then single-pass rolled and cooled to room temperature.

[0083] (4) Single-pass rolling, same as in Example 1. Because the plates used are all in a state of large plastic deformation and unannealed, there are large internal stresses. At the same time, the 6061 aluminum alloy without solid solution treatment contains Mg2Si, β-Al5FeSi, α-Al 12 The second phase particles such as (FeMn)3Si2 make the deformation coordination of 1060 industrial pure aluminum sheet and 6061 aluminum alloy sheet poor and the interface cracked during the rolling deformation process, resulting in the deterioration of their interface bonding.

[0084] Comparative Example 2

[0085] Compared with Example 1, the difference is that the 1060 industrial pure aluminum plate and the 6061 aluminum alloy plate are not roughened.

[0086] A method for preparing a layered aluminum-based composite plate comprises the following steps:

[0087] (1) Two 1060 industrial pure aluminum plates and one 6061 aluminum alloy plate were kept at 520°C for 45 minutes and then cleaned with acetone.

[0088] (2) Stack the 6061 aluminum alloy plate between two 1060Al plates.

[0089] (3) The stacked composite sheet with a thickness of 4.2 mm was placed in a muffle furnace and heated at 400° C. for 15 minutes, then single-pass rolled and cooled to room temperature.

[0090] (4) Single-pass rolling, same as Example 1. Because the surfaces of the 1060 industrial pure aluminum plate and the 6061 aluminum alloy plate are relatively smooth without roughening treatment, they slip at the interface during rolling deformation, and the deformation coordination deteriorates, resulting in the 1060Al and 6061Al being staggered and unable to be combined together.

[0091] Comparative Example 3

[0092] Compared with Example 1, the difference is that the 1060 industrial pure aluminum plate and the 6061 aluminum alloy plate are not heated in the muffle furnace at 400° C. and kept warm for 15 minutes.

[0093] (1) Two 1060 industrial pure aluminum plates and one 6061 aluminum alloy plate were kept at 520°C for 45 minutes, and then cleaned with acetone and surface polished.

[0094] (2) Stack the 6061 aluminum alloy plate between two 1060Al plates.

[0095] (3) The stacked composite sheet with a thickness of 4.2 mm is subjected to single-pass rolling.

[0096] (4) Single-pass rolling welding, the same as in Example 1. Because the 1060 industrial pure aluminum plate and the 6061 aluminum alloy plate were not heated at 400° C. and kept warm for 15 minutes, during the rolling process, under pressure, the 1060Al and 6061Al were bonded together, but in order to achieve the metallurgical bonding effect, the interface bonding performance was poor.

[0097] The properties of the layered aluminum-based plates provided in the above-mentioned Examples 1 to 5 and Comparative Examples 1 to 3 were tested respectively, and the results are shown in Table 1.

[0098] Table 1 Performance test table of the layered aluminum-based sheet materials of the embodiments of the present invention and the comparative examples

[0099] Maximum tensile strength (MPa) Yield strength(MPa) Elongation(%) Example 1 103 60 12.1 Example 2 92 68 13.2 Example 3 128 114 14.3 Example 4 130 127 16.3 Example 5 139 132 17.5 Comparative Example 1 / / / Comparative Example 2 / / / Comparative Example 3 87 53 10.4

[0100] Note: “ / ” indicates that it cannot be measured.

[0101] As can be seen from Table 1, the layered aluminum-based composite plate prepared by the present invention has better mechanical properties. The maximum tensile strength of the layered aluminum-based composite plate obtained by Example 5 after 7 rolling processes can reach 139MPa, the yield strength can reach 132MPa, and the elongation can reach 17.5%. The present invention firstly performs a solid solution treatment on the alloy plate of the first aluminum material and the second aluminum material to eliminate the internal stress of the aluminum material and completely dissolve the alloy elements in the second aluminum material into the aluminum lattice, and then performs a roughening treatment to obtain the first aluminum alloy plate and the second aluminum alloy plate with a fresh surface, and then stacks them together in a sandwich manner, and then performs cumulative rolling, which effectively promotes atomic diffusion between the first aluminum alloy plate and the second aluminum alloy plate, so that they are interlocked to achieve the effect of metallurgical bonding; at the same time, the internal stress of the plate is reduced by hot rolling, the work hardening is eliminated, and the grains undergo dynamic recovery and dynamic recrystallization, thereby refining the grains, achieving good bonding of the plate, avoiding oxidation of the bonding surface, improving the bonding of the alloy interface, and optimizing the comprehensive performance of the material.

[0102] The mechanical properties of the layered aluminum-based plates obtained in Comparative Examples 1 to 3 are not good, mainly because:

[0103] In Comparative Example 1, since the plates used were all in a state of large plastic deformation and unannealed state, there were large internal stresses. At the same time, the 6061 aluminum alloy without solid solution treatment contained Mg2Si, β-Al5FeSi, α-Al 12 The second phase particles such as (FeMn)3Si2 make the deformation coordination of 1060 industrial pure aluminum sheet and 6061 aluminum alloy sheet poor and the interface cracked during the rolling deformation process, resulting in the deterioration of their interface bonding.

[0104] In Comparative Example 2, because the plates were not roughened, the surfaces of the 1060 industrial pure aluminum plates and the 6061 aluminum alloy plates were relatively smooth. During the rolling deformation process, they slipped at the interface and the deformation coordination deteriorated, causing 1060Al and 6061Al to be offset and unable to be combined together.

[0105] In Comparative Example 3, because the 1060 industrial pure aluminum plate and the 6061 aluminum alloy plate were not heated at 400°C and kept warm for 15 minutes, during the rolling process, under the action of pressure, 1060Al and 6061Al bonded together, but in order to achieve the effect of metallurgical bonding, the interface bonding performance was poor.

[0106] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for preparing a layered aluminum-based composite sheet, characterized in that: The following steps are involved: The first aluminum material and the second aluminum material are solution treated at 480° C. to 540° C. to eliminate the internal stress of the aluminum material and to dissolve the alloy elements in the second aluminum material into the aluminum lattice, and roughened to obtain a pretreated first aluminum material and a pretreated second aluminum material; The pretreated first aluminum material is used as the surface layer, and the pretreated second aluminum material is used as the core layer, which are stacked in a structure of surface layer-core layer-surface layer, heated at 380° C. to 420° C., rolled once, and cooled to obtain a layered aluminum-based composite plate.

2. The method for preparing the layered aluminum-based composite sheet according to claim 1, characterized in that: After one rolling is completed, a single rolled plate is obtained, which is roughened, cut and stacked, and rolled again at 350°C to 450°C.

3. The method for preparing the layered aluminum-based composite sheet according to claim 2, characterized in that: After the second rolling is completed, a secondary rolled plate is obtained, the secondary rolled plate is cut and stacked, and a rolling treatment is performed at 350° C. to 450° C., and the rolling treatment is repeated 1 to 3 times.

4. The method for preparing the layered aluminum-based composite sheet according to claim 3, characterized in that: The speeds of the first rolling and the second rolling were both 0.4 m / s, and the reduction amount of each rolling was 50%.

5. The method for preparing the layered aluminum-based composite sheet according to claim 1, characterized in that: The first aluminum material is 1061Al, 1050Al, 1070Al or 1100Al; the second aluminum material is 6061Al, 6060Al, 6063Al or 6463Al.

6. The method for preparing a layered aluminum-based composite sheet according to claim 1, characterized in that: The time of the solution treatment is 30 min to 60 min.

7. The method for preparing a layered aluminum-based composite sheet according to claim 1, characterized in that: The heating time is 10 min to 20 min.

8. The method for preparing a layered aluminum-based composite sheet according to claim 1, characterized in that: The roughening treatment specifically includes: grinding with sandpaper with a mesh number of ≤80, and then washing with ultrasonic acetone.

9. The method for preparing a layered aluminum-based composite sheet according to claim 1, characterized in that: Before the roughening treatment, the oxide film and oil stains on the surface of the aluminum material are removed; after the roughening treatment, the surface roughness of the plate is ≥ Ra3.

2.

10. A layered aluminum-based composite sheet prepared by the method for preparing a layered aluminum-based composite sheet according to any one of claims 1 to 9.

Images