CN112659670A - Light high-strength aluminum alloy composite board and preparation method thereof - Google Patents
Light high-strength aluminum alloy composite board and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a light high-strength aluminum alloy composite plate and a preparation method thereof. The invention adopts a composite structure of two layers of aluminum alloy plates and one layer of carbon steel plate, and designs the V-shaped connecting structure, so that the aluminum alloy composite plate has the characteristics of higher overall strength, good tensile strength, yield strength, hardness, high elongation and the like while the quality of the aluminum alloy composite plate is reduced, and the layers are welded by adopting an ultrasonic welding technology, so that the welding speed is high, the welding strength is high, the sealing performance is good, the service life of the aluminum alloy composite plate is prolonged, and the aluminum alloy composite plate can be widely applied to various industries and has good market advance.
Description
Technical Field
The invention relates to the technical field of aluminum alloy plates, in particular to a light high-strength aluminum alloy composite plate and a preparation method thereof.
Background
Aluminum alloy is a non-ferrous metal structural material which is most widely applied in industry, and is widely applied in aviation, aerospace, automobiles, mechanical manufacturing, ships and chemical industry, the rapid development of industrial economy has increased the demand on aluminum alloy welded structural parts, the research on the weldability of the aluminum alloy is also deepened, the aluminum alloy has low density, higher strength which is close to or exceeds that of high-quality steel, good plasticity, can be processed into various sections, and has excellent electrical conductivity, thermal conductivity and corrosion resistance, the aluminum alloy is widely used in industry, the use amount is second to that of the steel, the integral strength of the aluminum alloy plate is reduced after being treated at present, the strength is usually enhanced by enhancing the thickness of the aluminum alloy plate, but the quality is also enhanced while enhancing the thickness.
Disclosure of Invention
The invention aims to provide a light high-strength aluminum alloy composite plate and a preparation method thereof, so as to solve the problems in the background technology.
The utility model provides a light high strength aluminum alloy composite sheet, includes lower floor's aluminum alloy plate, middle level carbon steel sheet and upper aluminum alloy plate, lower floor's aluminum alloy plate, middle level carbon steel sheet and upper aluminum alloy plate set up by from bottom to top in proper order, all have a plurality of alloy V-arrangement support through ultrasonic bonding on the upper and lower surface of middle level carbon steel sheet, lower floor's aluminum alloy plate and alloy V-arrangement support and between and all adopt ultrasonic bonding between upper aluminum alloy plate and the alloy V-arrangement support.
As a further improvement of the invention, the lower layer aluminum alloy plate and the upper layer aluminum alloy plate have the following main components: si, Fe, Cu, Mn, Mg, C, Zn, Ti and Al, wherein the ratio of main components of the lower layer aluminum alloy plate and the upper layer aluminum alloy plate is Si (23.2): fe (0.5): cu (2.0-2.6): mn (0.15): mg (1.2-1.8): c (0.18-0.28): zn (0.25): ti (0.15): al (the balance), and the main components of the middle carbon steel plate comprise C, Fe, Mn, Si and other elements.
As a further improvement of the invention, the preparation method of the aluminum alloy composite plate comprises the following steps: s1, preparing an aluminum alloy plate, S2, preparing a carbon steel plate and S3, and synthesizing the aluminum alloy composite plate, wherein the S1 aluminum alloy plate comprises the following steps: a1, smelting and die casting, a2, annealing and hot rolling, a3, forging and repairing, a4 and coating for rust prevention.
S1, preparing an aluminum alloy plate: several portions were prepared according to Si (23.2): fe (0.5): cu (2.0-2.6): mn (0.15): mg (1.2-1.8): c (0.18-0.28): zn (0.25): ti (0.15): preparing an aluminum alloy block with Al (the balance) for later use;
a1, smelting and die casting: introducing an aluminum alloy block into a smelting furnace for smelting, controlling the temperature of the smelting furnace to be 650-750 ℃ in the smelting process, then introducing molten aluminum alloy liquid into a pressure chamber of a die-casting device, filling a cavity of a steel mould at a high speed, and solidifying the alloy liquid under pressure to form an aluminum alloy plate;
a2, annealing and hot rolling: annealing and hot rolling the aluminum alloy plate subjected to smelting and die casting in the step a1 through an annealing device and a hot rolling process to form the aluminum alloy plate into a specified size and shape;
a3, forging and repairing: polishing the aluminum alloy plate subjected to annealing and hot rolling treatment in the step a2 by a pneumatic grinder and a pneumatic small milling cutter, eliminating defects (folding, burrs, cracks and the like) on the surface of the aluminum alloy plate, and repairing casting defects such as shrinkage cavities, sand holes, air holes, slag inclusions and the like on the surface of the aluminum alloy plate by a repairing device;
a4, coating and rust prevention: smoothing the surface of the aluminum alloy plate subjected to forging and repairing in the step a3, and then coating and coating an anti-rust layer;
s2, preparing a carbon steel plate: selecting a plurality of carbon steel plates with the specification and mass for later use, grinding and polishing the surfaces of two sides of each carbon steel plate by a pneumatic grinder and a pneumatic small milling cutter to ensure that the surfaces of the carbon steel plates have no defects such as dents or burrs and the like, welding a plurality of alloy V-shaped brackets on the upper end surface and the lower end surface of each carbon steel plate by an ultrasonic welding technology, and performing rust prevention treatment on the carbon steel plates of the welded alloy V-shaped brackets;
s3, synthesizing an aluminum alloy composite plate: and (4) tiling the aluminum alloy plate prepared by the aluminum alloy plate in the step S1, then placing the carbon steel plate prepared by the carbon steel plate in parallel in the step S2, placing an aluminum alloy plate at the upper end of the carbon steel plate in parallel, and welding the aluminum alloy plate in an ultrasonic welding mode.
As a further improvement of the invention, the main component Mn in the middle carbon steel plate is controlled within the range of 0.5-0.8%, Si is controlled within the range of 0.17-0.37%, the content of other components S in the middle carbon steel plate is not more than 0.05%, and the content of P is not more than 0.045%.
As a further improvement, in the preparation method of the aluminum alloy composite plate, the pressure for crystallizing and solidifying the aluminum alloy plate in the step a1 and the smelting and die-casting process is 15-100 MPa, wherein the aluminum alloy liquid fills the cavity at a speed of 50-80 m/s.
As a further improvement, the step a2 and the annealing treatment step in the annealing and hot rolling in the preparation method of the aluminum alloy composite plate comprise the following steps: annealing at 500-450 ℃ for 10-20 min, then annealing at 300-350 ℃ for 10-15 min, and finally annealing at 200-300 ℃ for 10-20 min.
As a further improvement, in the preparation method of the aluminum alloy composite plate, in the step a3, a cold welding repair machine is adopted when casting defects such as shrinkage cavities, sand holes, air holes, slag inclusions and the like on the surface of the aluminum alloy plate are repaired in the forging repair process, and the casting defects are repaired by utilizing the high-frequency electric spark instant discharge and non-heat surfacing welding principle.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, by adopting a composite structure of two layers of aluminum alloy plates and one layer of carbon steel plate and designing the V-shaped connecting structure, the overall strength of the aluminum alloy composite plate is higher while the quality of the aluminum alloy composite plate is reduced;
2. according to the invention, by setting the corresponding proportion of the components of the aluminum alloy plate, the aluminum alloy plate has the characteristics of good tensile strength, yield strength, hardness, high elongation and the like;
3. according to the invention, the layers are welded by adopting an ultrasonic welding technology, so that the welding speed is high, the welding strength is high, the sealing performance is good, the service life of the aluminum alloy composite plate is prolonged, the aluminum alloy composite plate can be widely applied to various industries, and the market advance is good.
Drawings
FIG. 1 is a flowchart of a light high-strength aluminum alloy composite plate and a method for manufacturing the same;
fig. 2 is an overall perspective view of a lightweight high-strength aluminum alloy composite plate according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-2, the present invention provides the following technical solutions: the utility model provides a light high strength aluminum alloy composite sheet, includes lower floor's aluminum alloy plate 1, middle level carbon steel sheet 2 and upper aluminum alloy plate 3, and lower floor's aluminum alloy plate 1, middle level carbon steel sheet 2 and upper aluminum alloy plate 3 are in proper order by setting up from bottom to top, all have a plurality of alloy V-arrangement support 4 through ultrasonic bonding on middle level carbon steel sheet 2's the upper and lower surface, and lower floor's aluminum alloy plate 1 and alloy V-arrangement support 4 and between and all adopt ultrasonic bonding between upper aluminum alloy plate 3 and the alloy V-arrangement support 4.
In some embodiments of the present invention, the lower aluminum alloy sheet 1 and the upper aluminum alloy sheet 3 have main components: si, Fe, Cu, Mn, Mg, C, Zn, Ti and Al, and the ratio of the main components of the lower aluminum alloy sheet 1 and the upper aluminum alloy sheet 3 is Si (23.2): fe (0.5): cu (2.2): mn (0.15): mg (1.6): c (0.2): zn (0.25): ti (0.15): al (the balance), the main components of the middle carbon steel plate 2 are C, Fe, Mn, Si and other elements.
Watch 1
In some embodiments of the present invention, the method for preparing the aluminum alloy composite plate comprises the following steps: s1, preparing an aluminum alloy plate, S2, preparing a carbon steel plate and S3, and synthesizing the aluminum alloy composite plate, wherein the S1 aluminum alloy plate comprises the following steps: a1, smelting and die casting, a2, annealing and hot rolling, a3, forging and repairing, a4 and coating for rust prevention.
S1, preparing an aluminum alloy plate: several portions were prepared according to Si (23.2): fe (0.5): cu (2.0-2.6): mn (0.15): mg (1.2-1.8): c (0.18-0.28): zn (0.25): ti (0.15): preparing an aluminum alloy block with Al (the balance) for later use;
a1, smelting and die casting: introducing an aluminum alloy block into a smelting furnace for smelting, controlling the temperature of the smelting furnace to be 650-750 ℃ in the smelting process, then introducing molten aluminum alloy liquid into a pressure chamber of a die-casting device, filling a cavity of a steel mould at a high speed, and solidifying the alloy liquid under pressure to form an aluminum alloy plate;
a2, annealing and hot rolling: annealing and hot rolling the aluminum alloy plate subjected to smelting and die casting in the step a1 through an annealing device and a hot rolling process to form the aluminum alloy plate into a specified size and shape;
a3, forging and repairing: polishing the aluminum alloy plate subjected to annealing and hot rolling treatment in the step a2 by a pneumatic grinder and a pneumatic small milling cutter, eliminating defects (folding, burrs, cracks and the like) on the surface of the aluminum alloy plate, and repairing casting defects such as shrinkage cavities, sand holes, air holes, slag inclusions and the like on the surface of the aluminum alloy plate by a repairing device;
a4, coating and rust prevention: smoothing the surface of the aluminum alloy plate subjected to forging and repairing in the step a3, and then coating and coating an anti-rust layer;
s2, preparing a carbon steel plate: selecting a plurality of carbon steel plates with the specification and mass for later use, grinding and polishing the surfaces of two sides of each carbon steel plate by a pneumatic grinder and a pneumatic small milling cutter to ensure that the surfaces of the carbon steel plates have no defects such as dents or burrs and the like, welding a plurality of alloy V-shaped brackets on the upper end surface and the lower end surface of each carbon steel plate by an ultrasonic welding technology, and performing rust prevention treatment on the carbon steel plates of the welded alloy V-shaped brackets;
s3, synthesizing an aluminum alloy composite plate: and (4) tiling the aluminum alloy plate prepared by the aluminum alloy plate in the step S1, then placing the carbon steel plate prepared by the carbon steel plate in parallel in the step S2, placing an aluminum alloy plate at the upper end of the carbon steel plate in parallel, and welding the aluminum alloy plate in an ultrasonic welding mode.
In some embodiments of the invention, the main component Mn in the middle carbon steel plate 2 is controlled within the range of 0.5% -0.8% to strengthen the steel, Si is controlled within the range of 0.17-0.37%, the content of S in other components in the middle carbon steel plate 2 for preventing welding seams from being hot cracked is required to be not more than 0.05%, the content of P is required to be not more than 0.045%, and P is prevented from reducing the welding performance of the steel.
In some embodiments of the present invention, the pressure for crystallizing and solidifying the aluminum alloy plate in the step a1 of the method for preparing the aluminum alloy composite plate in the invention is 15-100 MPa in the smelting and die casting, wherein the aluminum alloy liquid fills the cavity at 50-80 m/s.
In some embodiments of the present invention, the step a2 of the method for manufacturing the aluminum alloy composite plate according to the present invention, the annealing treatment step in annealing and hot rolling, comprises: annealing at 500-450 ℃ for 10-20 min, then annealing at 300-350 ℃ for 10-15 min, and finally annealing at 200-300 ℃ for 10-20 min.
In some embodiments of the invention, in the step a3 of the preparation method of the aluminum alloy composite plate, a cold welding repair machine is adopted when casting defects such as shrinkage cavities, sand holes, air holes, slag inclusions and the like on the surface of the aluminum alloy plate are repaired in the forging repair process, the casting defects are repaired by utilizing the high-frequency electric spark instant discharge and non-heat surfacing welding principle, the cold welding heat affected zone is small, the annealing deformation of the base material is not caused, and cracks, hard spots and hardening phenomena are not generated. And the welding strength is high, the repair material and the matrix are simultaneously melted and then solidified, the combination is firm, the processing such as grinding, milling, filing and the like can be carried out, and the welding structure is compact and does not fall off.
Example 2
Referring to fig. 1-2, the present invention provides the following technical solutions: the utility model provides a light high strength aluminum alloy composite sheet, includes lower floor's aluminum alloy plate 1, middle level carbon steel sheet 2 and upper aluminum alloy plate 3, and lower floor's aluminum alloy plate 1, middle level carbon steel sheet 2 and upper aluminum alloy plate 3 are in proper order by setting up from bottom to top, all have a plurality of alloy V-arrangement support 4 through ultrasonic bonding on middle level carbon steel sheet 2's the upper and lower surface, and lower floor's aluminum alloy plate 1 and alloy V-arrangement support 4 and between and all adopt ultrasonic bonding between upper aluminum alloy plate 3 and the alloy V-arrangement support 4.
In some embodiments of the present invention, the lower aluminum alloy sheet 1 and the upper aluminum alloy sheet 3 have main components: si, Fe, Cu, Mn, Mg, C, Zn, Ti and Al, and the ratio of the main components of the lower aluminum alloy sheet 1 and the upper aluminum alloy sheet 3 is Si (24): fe (0.5): cu (2.0): mn (0.18): mg (2.0): c (0.5): zn (0.15): ti (0.20): al (the balance), the main components of the middle carbon steel plate 2 are C, Fe, Mn, Si and other elements.
Watch two
In some embodiments of the present invention, the method for preparing the aluminum alloy composite plate comprises the following steps: s1, preparing an aluminum alloy plate, S2, preparing a carbon steel plate and S3, and synthesizing the aluminum alloy composite plate, wherein the S1 aluminum alloy plate comprises the following steps: a1, smelting and die casting, a2, annealing and hot rolling, a3, forging and repairing, a4 and coating for rust prevention.
S1, preparing an aluminum alloy plate: several portions were prepared according to Si (23.2): fe (0.5): cu (2.0-2.6): mn (0.15): mg (1.2-1.8): c (0.18-0.28): zn (0.25): ti (0.15): preparing an aluminum alloy block with Al (the balance) for later use;
a1, smelting and die casting: introducing an aluminum alloy block into a smelting furnace for smelting, controlling the temperature of the smelting furnace to be 650-750 ℃ in the smelting process, then introducing molten aluminum alloy liquid into a pressure chamber of a die-casting device, filling a cavity of a steel mould at a high speed, and solidifying the alloy liquid under pressure to form an aluminum alloy plate;
a2, annealing and hot rolling: annealing and hot rolling the aluminum alloy plate subjected to smelting and die casting in the step a1 through an annealing device and a hot rolling process to form the aluminum alloy plate into a specified size and shape;
a3, forging and repairing: polishing the aluminum alloy plate subjected to annealing and hot rolling treatment in the step a2 by a pneumatic grinder and a pneumatic small milling cutter, eliminating defects (folding, burrs, cracks and the like) on the surface of the aluminum alloy plate, and repairing casting defects such as shrinkage cavities, sand holes, air holes, slag inclusions and the like on the surface of the aluminum alloy plate by a repairing device;
a4, coating and rust prevention: smoothing the surface of the aluminum alloy plate subjected to forging and repairing in the step a3, and then coating and coating an anti-rust layer;
s2, preparing a carbon steel plate: selecting a plurality of carbon steel plates with the specification and mass for later use, grinding and polishing the surfaces of two sides of each carbon steel plate by a pneumatic grinder and a pneumatic small milling cutter to ensure that the surfaces of the carbon steel plates have no defects such as dents or burrs and the like, welding a plurality of alloy V-shaped brackets on the upper end surface and the lower end surface of each carbon steel plate by an ultrasonic welding technology, and performing rust prevention treatment on the carbon steel plates of the welded alloy V-shaped brackets;
s3, synthesizing an aluminum alloy composite plate: and (4) tiling the aluminum alloy plate prepared by the aluminum alloy plate in the step S1, then placing the carbon steel plate prepared by the carbon steel plate in parallel in the step S2, placing an aluminum alloy plate at the upper end of the carbon steel plate in parallel, and welding the aluminum alloy plate in an ultrasonic welding mode.
In some embodiments of the invention, the main component Mn in the middle carbon steel plate 2 is controlled within the range of 0.5% -0.8% to strengthen the steel, Si is controlled within the range of 0.17-0.37%, the content of S in other components in the middle carbon steel plate 2 for preventing welding seams from being hot cracked is required to be not more than 0.05%, the content of P is required to be not more than 0.045%, and P is prevented from reducing the welding performance of the steel.
In some embodiments of the present invention, the pressure for crystallizing and solidifying the aluminum alloy plate in the step a1 of the method for preparing the aluminum alloy composite plate in the invention is 15-100 MPa in the smelting and die casting, wherein the aluminum alloy liquid fills the cavity at 50-80 m/s.
In some embodiments of the present invention, the step a2 of the method for manufacturing the aluminum alloy composite plate according to the present invention, the annealing treatment step in annealing and hot rolling, comprises: annealing at 500-450 ℃ for 10-20 min, then annealing at 300-350 ℃ for 10-15 min, and finally annealing at 200-300 ℃ for 10-20 min.
In some embodiments of the invention, in the step a3 of the preparation method of the aluminum alloy composite plate, a cold welding repair machine is adopted when casting defects such as shrinkage cavities, sand holes, air holes, slag inclusions and the like on the surface of the aluminum alloy plate are repaired in the forging repair process, the casting defects are repaired by utilizing the high-frequency electric spark instant discharge and non-heat surfacing welding principle, the cold welding heat affected zone is small, the annealing deformation of the base material is not caused, and cracks, hard spots and hardening phenomena are not generated. And the welding strength is high, the repair material and the matrix are simultaneously melted and then solidified, the combination is firm, the processing such as grinding, milling, filing and the like can be carried out, and the welding structure is compact and does not fall off.
According to the invention, a composite structure of two layers of aluminum alloy plates and one layer of carbon steel plate is adopted, and a V-shaped connecting structure is designed, so that the mass of the aluminum alloy composite plate is reduced, the overall strength of the aluminum alloy composite plate is higher, and the aluminum alloy composite plate has the characteristics of high tensile strength, yield strength, hardness, high elongation and the like, and has better performance than the existing aluminum alloy plate.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a light high strength aluminum alloy composite sheet, includes lower floor's aluminum alloy plate (1), middle level carbon steel sheet (2) and upper aluminum alloy plate (3), its characterized in that: lower floor's aluminum alloy plate (1), middle level carbon steel sheet (2) and upper aluminum alloy plate (3) are in proper order by setting up from bottom to top, all there is a plurality of alloy V-arrangement support (4) through ultrasonic bonding on the upper and lower surface of middle level carbon steel sheet (2), lower floor's aluminum alloy plate (1) and alloy V-arrangement support (4) and between and all adopt ultrasonic bonding between upper aluminum alloy plate (3) and alloy V-arrangement support (4).
2. The lightweight high-strength aluminum alloy composite plate according to claim 1, characterized in that: the main components of the lower aluminum alloy plate (1) and the upper aluminum alloy plate (3) are as follows: si, Fe, Cu, Mn, Mg, C, Zn, Ti and Al, wherein the ratio of main components of the lower aluminum alloy plate (1) and the upper aluminum alloy plate (3) is Si (23.2): fe (0.5): cu (2.0-2.6): mn (0.15): mg (1.2-1.8): c (0.18-0.28): zn (0.25): ti (0.15): al (the balance), and the main components of the middle carbon steel plate (2) comprise elements such as C, Fe, Mn, Si and the like.
3. The preparation method of the light high-strength aluminum alloy composite plate according to claim 2, characterized in that: the preparation method of the aluminum alloy composite plate comprises the following steps: s1, preparing an aluminum alloy plate, S2, preparing a carbon steel plate and S3, and synthesizing the aluminum alloy composite plate, wherein the S1 aluminum alloy plate comprises the following steps: a1, smelting and die casting, a2, annealing and hot rolling, a3, forging and repairing, a4 and coating for rust prevention.
S1, preparing an aluminum alloy plate: several portions were prepared according to Si (23.2): fe (0.5): cu (2.0-2.6): mn (0.15): mg (1.2-1.8): c (0.18-0.28): zn (0.25): ti (0.15): preparing an aluminum alloy block with Al (the balance) for later use;
a1, smelting and die casting: introducing an aluminum alloy block into a smelting furnace for smelting, controlling the temperature of the smelting furnace to be 650-750 ℃ in the smelting process, then introducing molten aluminum alloy liquid into a pressure chamber of a die-casting device, filling a cavity of a steel mould at a high speed, and solidifying the alloy liquid under pressure to form an aluminum alloy plate;
a2, annealing and hot rolling: annealing and hot rolling the aluminum alloy plate subjected to smelting and die casting in the step a1 through an annealing device and a hot rolling process to form the aluminum alloy plate into a specified size and shape;
a3, forging and repairing: polishing the aluminum alloy plate subjected to annealing and hot rolling treatment in the step a2 by a pneumatic grinder and a pneumatic small milling cutter, eliminating defects (folding, burrs, cracks and the like) on the surface of the aluminum alloy plate, and repairing casting defects such as shrinkage cavities, sand holes, air holes, slag inclusions and the like on the surface of the aluminum alloy plate by a repairing device;
a4, coating and rust prevention: smoothing the surface of the aluminum alloy plate subjected to forging and repairing in the step a3, and then coating and coating an anti-rust layer;
s2, preparing a carbon steel plate: selecting a plurality of carbon steel plates with the specification and mass for later use, grinding and polishing the surfaces of two sides of each carbon steel plate by a pneumatic grinder and a pneumatic small milling cutter to ensure that the surfaces of the carbon steel plates have no defects such as dents or burrs and the like, welding a plurality of alloy V-shaped brackets on the upper end surface and the lower end surface of each carbon steel plate by an ultrasonic welding technology, and performing rust prevention treatment on the carbon steel plates of the welded alloy V-shaped brackets;
s3, synthesizing an aluminum alloy composite plate: and (4) tiling the aluminum alloy plate prepared by the aluminum alloy plate in the step S1, then placing the carbon steel plate prepared by the carbon steel plate in parallel in the step S2, placing an aluminum alloy plate at the upper end of the carbon steel plate in parallel, and welding the aluminum alloy plate in an ultrasonic welding mode.
4. The light-weight high-strength aluminum alloy composite plate and the preparation method thereof according to claim 2, characterized in that: the main component Mn in the middle carbon steel plate (2) is controlled within the range of 0.5-0.8%, Si is controlled within the range of 0.17-0.37%, the content of S in other components in the middle carbon steel plate (2) is not more than 0.05%, and the content of P is not more than 0.045%.
5. The light-weight high-strength aluminum alloy composite plate and the preparation method thereof according to claim 3, characterized in that: in the step a1 of the preparation method of the aluminum alloy composite plate, the pressure of crystallization and solidification of the aluminum alloy plate in smelting and die casting is 15-100 MPa, wherein the aluminum alloy liquid is filled into the cavity at a rate of 50-80 m/s.
6. The light-weight high-strength aluminum alloy composite plate and the preparation method thereof according to claim 3, characterized in that: the preparation method of the aluminum alloy composite plate comprises the steps of a2 and annealing treatment in annealing and hot rolling: annealing at 500-450 ℃ for 10-20 min, then annealing at 300-350 ℃ for 10-15 min, and finally annealing at 200-300 ℃ for 10-20 min.
7. The light-weight high-strength aluminum alloy composite plate and the preparation method thereof according to claim 3, characterized in that: according to the preparation method of the aluminum alloy composite plate, in the step a3, when casting defects such as shrinkage cavities, sand holes, air holes, slag inclusions and the like on the surface of the aluminum alloy plate are repaired in forging repair, a cold welding repair machine is adopted, and casting defects are repaired by utilizing the high-frequency electric spark instant discharge and non-heat surfacing welding principle.
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| CN107052074A (en) * | 2017-02-28 | 2017-08-18 | 中国船舶重工集团公司第七二五研究所 | The preparation method of large-sized low-speed diesel engine bush high tin-aluminum alloy steel composite board |
| CN108971227A (en) * | 2018-07-26 | 2018-12-11 | 江苏常铝铝业股份有限公司 | A kind of high-strength light aluminium alloy compound plate and preparation method thereof |
| CN111014294A (en) * | 2019-12-08 | 2020-04-17 | 太原理工大学 | Method and equipment for preparing steel/aluminum laminated composite plate by small reduction cold-hot continuous rolling |
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