Production method of 5083 aluminum alloy hot-rolled plate

Abstract

The invention discloses a production method of a 5083 aluminum alloy hot-rolled plate, relates to the field of aluminum alloy manufacturing, and can solve the problem that the 5083 aluminum alloy plate cannot have high strength, high specific strength and good plasticity at the same time through a short technological process. The production method comprises the following steps of fusion casting, saw cutting, surface milling, heating, hot rolling and transverse cutting. An aluminum alloy cast ingot comprises the following chemical components in percentage by mass: less than or equal to 0.12% of Si, less than or equal to 0.25% of Fe, less than or equal to 0.10% of Cu, 0.5-0.70% of Mn, 4.30-4.60% of Mg, 0.05-0.15% of Cr, less than or equal to 0.10% of Zn, 0.01-0.05% of Ti, less than or equal to 0.05% of a single impurity element, less than or equal to 0.15% of other impurity elements and the balance of Al. By reasonably controlling aluminum alloy element components, ingot casting heating parameters, transfer plate retention time, hot finish rolling total processing rate, hot rolling coil finish rolling temperature and cooling after coil discharging, reasonable regulation and control of strength and plasticity are achieved, and good plasticity is achieved while the strength is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy manufacturing, and in particular to a production method of a 5083 aluminum alloy hot-rolled plate. Background Art

[0002] 5083 aluminum alloy has high strength and good formability, corrosion resistance, welding performance and fatigue resistance. Its plates are widely used in transportation vehicles, ships, containers and other fields. With the increasing requirements for energy conservation and emission reduction, the strength and specific strength of aluminum alloy plates and strips have been improved to achieve thinning. 5083 aluminum alloy is a non-heat-treatable strengthening alloy. The main strengthening method is deformation strengthening. This strengthening method usually leads to a decrease in plasticity while increasing strength. Bending is often used in downstream processing, which requires the plate to have high plasticity to prevent cracking during bending. Therefore, there is an urgent market demand for 5083 aluminum alloy plates with both high strength and good plasticity.

[0003] Chinese patents CN115852216A, CN110952007A and some documents disclose production methods for improving the strength of 5083 alloy while maintaining high plasticity, which are mainly achieved by cold rolling with appropriate processing rate and annealing at appropriate temperature after hot rolling. These production methods have many processes, resulting in long production cycle and high cost.

[0004] Chinese patent CN113136509A discloses a method for producing high-strength and corrosion-resistant 5083 aluminum alloy plates and strips. By cold rolling with a small processing rate after hot rolling, the material strength is improved and excellent spalling and intergranular corrosion resistance is obtained with a shorter process flow. However, the plasticity is relatively low and cannot meet the requirements of small radius bending.

[0005] Chinese patent CN104259781A discloses a method for manufacturing aluminum alloy plates, which obtains aluminum alloy plates with tensile strength ≥305MPa, yield strength ≥215MPa, and elongation ≥12% in a short production process through melting, sawing, milling, heating, hot rolling, cross-cutting, precision sawing processes, and control of chemical composition, heating parameters, rolling temperature, etc. in the processes. With the improvement of lightweight requirements, the aluminum alloy plates obtained by this method can no longer meet the high strength and high bending performance requirements of some markets. Summary of the invention

[0006] In view of the above shortcomings, the present invention provides a 5083 aluminum alloy hot-rolled plate production method, which can overcome the problem that conventional 5083 aluminum alloy hot-rolled plates cannot have high strength, high specific strength and good plasticity at the same time, and overcome the problem that cold rolling and annealing and other production processes are required to have high strength, high specific strength and good plasticity at the same time, which can shorten the production cycle and reduce production costs. The specific technical scheme is as follows:

[0007] A production method for a 5083 aluminum alloy hot-rolled plate comprises the following steps: melting and casting→sawing→surface milling→heating→hot rolling→crosscutting.

[0008] In the melting and casting step, the mass percentages of the chemical components of the aluminum alloy ingot are: Si≤0.12%, Fe≤0.25%, Cu≤0.10%, Mn 0.5-0.70%, Mg 4.30-4.60%, Cr 0.05-0.15%, Zn≤0.10%, Ti 0.01-0.05%, other impurity elements individually ≤0.05%, other impurity elements in total ≤0.15%, and the rest is Al.

[0009] In the heating step, the aluminum alloy ingot is heated to a temperature of 510 to 540° C. and the heat preservation time is 3 to 12 hours.

[0010] In the hot rolling step, the ingot is rolled into a hot rolled coil by hot rough rolling and 4-stand hot finishing rolling, the hot rough rolling final rolling temperature is 400-450° C., the hot rough rolling aluminum alloy ingot thickness is 22-30 mm, and the hot rough rolling aluminum alloy ingot stays on the roller for 5-10 minutes; the hot finishing rolling start temperature is 360-430° C., and the aluminum alloy hot rolled coil is 4.0-10.0 mm thick after being continuously rolled by 4 stands, the final rolling temperature is 245-260° C., and the natural cooling time of the aluminum alloy hot rolled coil after it comes off the line is ≥4 hours.

[0011] The strength and plasticity of aluminum-magnesium alloys are mainly affected by alloy composition, degree of work hardening and recrystallization generated during the rolling process. Mn, Mg and Cr are the main alloying elements of 5083 aluminum alloy. Appropriate addition can play a role in solid solution strengthening and improve strength without causing excessive decrease in plasticity. Impurity elements such as Si and Fe will form larger secondary phase particles in aluminum alloys, which are basically insoluble in the subsequent heat treatment process. These secondary phases will act as crack sources and crack propagation paths during bending, resulting in a decrease in the material's forming performance. Therefore, keeping the Si and Fe content at an economically feasible low level is beneficial to improving the plasticity of aluminum-magnesium alloy sheets. The high-temperature heating method of the ingot can effectively dissolve the non-equilibrium phase of the ingot and reduce the internal coarse phase, which is beneficial to avoid the coarse phase becoming a crack source and causing cracking during the bending process of the sheet. Aluminum alloys will produce work hardening during hot rolling. As the total processing rate increases, the aspect ratio of the fiber structure of the aluminum alloy sheet and strip increases. If the final rolling temperature is within the partial recrystallization temperature range, recovery and partial recrystallization can occur after the hot rolling line. Reasonable control of alloy composition, transfer plate residence time, and total hot finishing processing rate can control the crystallization temperature. Reasonable control of the hot rolled coil final rolling temperature and cooling rate can make the coil recover and partially recrystallize to the required degree after it comes off the line, thereby achieving reasonable regulation of strength and plasticity, and having appropriate plasticity while improving strength.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The aluminum alloy production process of the present invention is: melting and casting → sawing → milling → heating → hot rolling → cross-cutting. By reasonably controlling the alloy composition, ingot heating parameters, transfer plate residence time, total hot finishing processing rate, hot rolling coil final rolling temperature and coil cooling after off-line, the strength and plasticity are reasonably regulated, and the strength is improved while having appropriate plasticity. For products with a thickness of 4 to 10 mm, compared with the conventional cold rolling process, cold rolling, annealing and other processes are reduced, the production cycle can be shortened, and the production cost can be reduced. The aluminum alloy product of the present invention can achieve a tensile strength Rm ≥ 335MPa, a specific strength ≥ 0.126kNm / g, a non-proportional extension strength Rp0.2 ≥ 240MPa, and an elongation after fracture ≥ 16%.

[0014] 2. The present invention improves the strength of the aluminum alloy by adjusting Mn 0.5-0.70%, Mg 4.30-4.60%, and Cr 0.05-0.15%, so as to play a role of solid solution strengthening without causing excessive decrease in plasticity. The content of impurity elements such as Si and Fe is adjusted to reduce the formation of larger secondary phase particles, reduce the generation of crack sources and crack propagation paths, and is beneficial to improving the plasticity of the aluminum-magnesium alloy plate. The suitable fiber structure aspect ratio of the aluminum alloy plate and strip is controlled by adjusting the hot finishing processing rate. By reasonably controlling the final rolling temperature of the hot rolled coil and controlling the residence time of the transfer plate on the roller, the required degree of recovery and partial recrystallization can occur after the coil is off the line, thereby achieving reasonable regulation of strength and plasticity. DETAILED DESCRIPTION

[0015] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0016] Example 1

[0017] The present embodiment provides a method for producing a 5083 aluminum alloy hot-rolled plate with high strength and good plasticity, comprising the following steps: melting and casting→sawing→milling→heating→hot rolling→cross-cutting.

[0018] (1) Melting and casting: The raw materials are placed in a melting furnace for melting and casting. The mass percentage of the chemical elements in the ingot after melting and casting is:

[0019]

[0020] (2) Sawing and milling: The ingot is sawed and milled to obtain an aluminum alloy ingot with a milled surface.

[0021] (3) Heating: The milled ingot is heated to 525° C. and then kept at this temperature for 3 hours.

[0022] (4) Hot rolling: The aluminum alloy ingot subjected to the heat treatment is hot rolled, and the ingot is rolled into a hot rolled coil by hot rough rolling and 4-stand hot finishing rolling. The hot rough rolling final rolling temperature is 430° C., the transfer plate thickness is 26 mm, and the transfer plate stays on the roller for 8 minutes; the hot finishing rolling start rolling temperature is 410° C., and the coil is continuously rolled to 6.0 mm thick through 4 stands. The final rolling temperature is 245° C., and the hot rolled coil is naturally cooled for 4 hours after it comes off the line.

[0023] (5) Cross-cutting: The aluminum alloy hot-rolled coil is cut to a fixed length in the cross-cutting machine train to obtain the finished aluminum alloy sheet.

[0024] Example 2

[0025] The present embodiment provides a method for producing a 5083 aluminum alloy hot-rolled plate with high strength and good plasticity, comprising the following steps: melting and casting→sawing→milling→heating→hot rolling→cross-cutting.

[0026] (1) Melting and casting: The raw materials are placed in a melting furnace for melting and casting. The mass percentage of the chemical elements in the ingot after melting and casting is:

[0027]

[0028]

[0029] (2) Sawing and milling: The ingot is sawed and milled to obtain an aluminum alloy ingot with a milled surface.

[0030] (3) Heating: The milled aluminum alloy ingot is heated to 540°C and then kept at this temperature for 6 hours.

[0031] (4) Hot rolling: The aluminum alloy ingot subjected to the heat treatment is hot rolled, and the ingot is rolled into a hot rolled coil by hot rough rolling and 4-stand hot finishing rolling. The hot rough rolling final rolling temperature is 450°C, the transfer plate thickness is 30 mm, and the transfer plate stays on the roller for 5 minutes. The hot finishing rolling start temperature is 430°C, and the coil is rolled to 4.0 mm thick through 4-stand continuous rolling. The final rolling temperature is 253°C, and the hot rolled coil is naturally cooled for 8 hours after it comes off the line.

[0032] (5) Cross-cutting: The aluminum alloy hot-rolled coil is cut to a fixed length in the cross-cutting machine train to obtain the finished aluminum alloy sheet.

[0033] Example 3

[0034] The present embodiment provides a method for producing a 5083 aluminum alloy hot-rolled plate with high strength and good plasticity, comprising the following steps: melting and casting→sawing→milling→heating→hot rolling→cross-cutting.

[0035] (1) Melting and casting: The raw materials are placed in a melting furnace for melting and casting. The mass percentage of the chemical elements in the ingot after melting and casting is:

[0036]

[0037] (2) Sawing and milling: The ingot is sawed and milled to obtain an aluminum alloy ingot with a milled surface.

[0038] (3) Heating: Heat the milled aluminum alloy ingot to 510°C and keep it warm for 12 hours.

[0039] (4) Hot rolling: The aluminum alloy ingot subjected to the heat treatment is hot rolled, and the ingot is rolled into a hot rolled coil by hot rough rolling and 4-stand hot finishing rolling. The hot rough rolling final rolling temperature is 400° C., the transfer plate thickness is 22 mm, and the transfer plate stays on the roller for 10 minutes; the hot finishing rolling start rolling temperature is 360° C., and the coil is continuously rolled to 10.0 mm thick by 4 stands. The final rolling temperature is 260° C., and the hot rolled coil is naturally cooled for 12 hours after it comes off the line.

[0040] (5) Cross-cutting: The aluminum alloy hot-rolled coil is cut to a fixed length in the cross-cutting machine train to obtain the finished aluminum alloy sheet.

[0041] Comparative Example 1

[0042] The present embodiment provides a method for producing a 5083 aluminum alloy hot-rolled plate with high strength and good plasticity, comprising the following steps: melting and casting→sawing→milling→heating→hot rolling→cross-cutting.

[0043] (1) Melting and casting: The raw materials are placed in a melting furnace for melting and casting. The mass percentage of the chemical elements in the ingot after melting and casting is:

[0044]

[0045] (2) Sawing and milling: The ingot is sawed and milled to obtain an aluminum alloy ingot with a milled surface.

[0046] (3) Heating: Heat the milled aluminum alloy ingot to 490°C and keep it at this temperature for 3 hours.

[0047] (4) Hot rolling: The aluminum alloy ingot subjected to the heat treatment is hot rolled, and the ingot is rolled into a hot rolled coil by hot rough rolling and 4-stand hot finishing rolling. The hot rough rolling final rolling temperature is 420° C., the transfer plate thickness is 26 mm, and the transfer plate does not stop on the roller table before entering the finishing rolling. The hot finishing rolling start rolling temperature is 410° C., and the coil is rolled to 6.0 mm thick through 4 stands. The final rolling temperature is 255° C., and the hot rolled coil is naturally cooled for 6 hours after it comes off the line.

[0048] (5) Cross-cutting: The aluminum alloy hot-rolled coil is cut to a fixed length in the cross-cutting machine train to obtain the finished aluminum alloy sheet.

[0049] Comparative Example 2

[0050] The present embodiment provides a method for producing a 5083 aluminum alloy hot-rolled plate with high strength and good plasticity, comprising the following steps: melting and casting→sawing→milling→heating→hot rolling→cross-cutting.

[0051] (1) Melting and casting: The raw materials are placed in a melting furnace for melting and casting. The mass percentage of the chemical elements in the ingot after melting and casting is:

[0052]

[0053] (2) Sawing and milling: The ingot is sawed and milled to obtain an aluminum alloy ingot with a milled surface.

[0054] (3) Heating: Heat the milled aluminum alloy ingot to 480°C and keep it at this temperature for 3 hours.

[0055] (4) Hot rolling: The aluminum alloy ingot subjected to the heat treatment is hot rolled, and the ingot is rolled into a hot rolled coil by hot rough rolling and 4-stand hot finishing rolling. The hot rough rolling final rolling temperature is 410° C., the transfer plate thickness is 26 mm, and the transfer plate does not stop on the roller table before entering the finishing rolling. The hot finishing rolling start temperature is 400° C., and the coil is rolled to 6.0 mm thick through 4 stands. The final rolling temperature is 265° C., and the hot rolled coil is naturally cooled for 6 hours after it comes off the line.

[0056] (5) Cross-cutting: The aluminum alloy hot-rolled coil is cut to a fixed length in the cross-cutting machine train to obtain the finished aluminum alloy sheet.

[0057] Comparative Example 3

[0058] The present embodiment provides a method for producing a 5083 aluminum alloy hot-rolled plate with high strength and good plasticity, comprising the following steps: melting and casting→sawing→milling→heating→hot rolling→cross-cutting.

[0059] (1) Melting and casting: The raw materials are placed in a melting furnace for melting and casting. The mass percentage of the chemical elements in the ingot after melting and casting is:

[0060]

[0061] (2) Sawing and milling: The ingot is sawed and milled to obtain an aluminum alloy ingot with a milled surface.

[0062] (3) Heating: Heat the milled aluminum alloy ingot to 525°C and keep it warm for 3 hours.

[0063] (4) Hot rolling: The aluminum alloy ingot subjected to the heat treatment is hot rolled, and the ingot is rolled into a hot rolled coil by hot rough rolling and 4-stand hot finishing rolling. The hot rough rolling final rolling temperature is 430° C., the transfer plate thickness is 26 mm, and the transfer plate does not stop on the roller table before entering the finishing rolling. The hot finishing rolling start temperature is 400° C., and the coil is rolled to 6.0 mm thick through 4 stands. The final rolling temperature is 245° C., and the hot rolled coil is naturally cooled for 6 hours after it comes off the line.

[0064] (5) Cross-cutting: The aluminum alloy hot-rolled coil is cut to a fixed length in the cross-cutting machine train to obtain the finished aluminum alloy sheet.

[0065] Comparative Example 4

[0066] The present embodiment provides a method for producing a 5083 aluminum alloy hot-rolled plate with high strength and good plasticity, comprising the following steps: melting and casting→sawing→milling→heating→hot rolling→cross-cutting.

[0067] (1) Melting and casting: The raw materials are placed in a melting furnace for melting and casting. The mass percentage of the chemical elements in the ingot after melting and casting is:

[0068]

[0069] (2) Sawing and milling: The ingot is sawed and milled to obtain an aluminum alloy ingot with a milled surface.

[0070] (3) Heating: The milled ingot is heated to 525° C. and then kept at this temperature for 3 hours.

[0071] (4) Hot rolling: The aluminum alloy ingot subjected to the heat treatment is hot rolled, and the ingot is rolled into a hot rolled coil by hot rough rolling and 4-stand hot finishing rolling. The hot rough rolling final rolling temperature is 430° C., the transfer plate thickness is 26 mm, and the transfer plate does not stop on the roller table before entering the finishing rolling. The hot finishing rolling start rolling temperature is 410° C., and the coil is continuously rolled to 6.0 mm thick through 4 stands. The final rolling temperature is 245° C., and the hot rolled coil is naturally cooled for 4 hours after it comes off the line.

[0072] (5) Cross-cutting: The aluminum alloy hot-rolled coil is cut to a fixed length in the cross-cutting machine train to obtain the finished aluminum alloy sheet.

[0073] Comparative Example 5

[0074] The present embodiment provides a method for producing a 5083 aluminum alloy hot-rolled plate with high strength and good plasticity, comprising the following steps: melting and casting→sawing→milling→heating→hot rolling→cross-cutting.

[0075] (1) Melting and casting: The raw materials are placed in a melting furnace for melting and casting. The mass percentage of the chemical elements in the ingot after melting and casting is:

[0076]

[0077] (2) Sawing and milling: The ingot is sawed and milled to obtain an aluminum alloy ingot with a milled surface.

[0078] (3) Heating: The milled ingot is heated to 525° C. and then kept at this temperature for 3 hours.

[0079] (4) Hot rolling: The aluminum alloy ingot subjected to the heat treatment is hot rolled, and the ingot is rolled into a hot rolled coil by hot rough rolling and 4-stand hot finishing rolling. The hot rough rolling final rolling temperature is 430° C., the transfer plate thickness is 32 mm, and the transfer plate stays on the roller for 8 minutes. The hot finishing rolling start temperature is 410° C., and the coil is continuously rolled to 3.0 mm thick through 4 stands. The final rolling temperature is 245° C., and the hot rolled coil is naturally cooled for 4 hours after it comes off the line.

[0080] (5) Cross-cutting: The aluminum alloy hot-rolled coil is cut to a fixed length in the cross-cutting machine train to obtain the finished aluminum alloy sheet.

[0081] Comparative Example 6

[0082] The present embodiment provides a method for producing a 5083 aluminum alloy hot-rolled plate with high strength and good plasticity, comprising the following steps: melting and casting→sawing→milling→heating→hot rolling→cross-cutting.

[0083] (1) Melting and casting: The raw materials are placed in a melting furnace for melting and casting. The mass percentage of the chemical elements in the ingot after melting and casting is:

[0084]

[0085] (2) Sawing and milling: The ingot is sawed and milled to obtain an aluminum alloy ingot with a milled surface.

[0086] (3) Heating: The milled ingot is heated to 525° C. and then kept at this temperature for 3 hours.

[0087] (4) Hot rolling: The aluminum alloy ingot subjected to the heat treatment is hot rolled, and the ingot is rolled into a hot rolled coil by hot rough rolling and 4-stand hot finishing rolling. The hot rough rolling final rolling temperature is 430° C., the transfer plate thickness is 20 mm, and the transfer plate stays on the roller for 8 minutes. The hot finishing rolling start rolling temperature is 410° C., and the coil is continuously rolled to 12 mm thick through 4 stands. The final rolling temperature is 245° C., and the hot rolled coil is naturally cooled for 4 hours after it comes off the line.

[0088] (5) Cross-cutting: The aluminum alloy hot-rolled coil is cut to a fixed length in the cross-cutting machine train to obtain the finished aluminum alloy sheet.

[0089] The mechanical properties and bending properties of the embodiments and comparative examples are as follows:

[0090]

[0091] It can be seen from the above data that the 5083 aluminum alloy hot-rolled plate prepared by the production method of Examples 1-3 can achieve a tensile strength Rm ≥ 335 MPa, a specific strength ≥ 0.126 kNm / g, a specified non-proportional elongation strength Rp0.2 ≥ 240 MPa, an elongation after fracture ≥ 16%, and can be bent at 90 degrees with a radius of 1.5 times the thickness without cracking.

[0092] Comparison 1 reduces the ingot heating temperature (490°C), increases the content of Si and Fe elements, and controls the transfer plate not to stay on the roller, which slightly reduces the product strength, greatly reduces the plasticity, and causes cracking during bending; Comparison Example 2 further reduces the ingot heating temperature (480°C) compared with Comparison Example 1, but increases the hot finishing rolling temperature, controls the transfer plate not to stay on the roller, slightly reduces the product plasticity, and greatly reduces the strength. Increasing the hot finishing rolling temperature can prevent the coarse phase from becoming a crack source during the bending process of the plate, causing cracking; Comparison Example 3 reduces the hot finishing rolling temperature, the non-equilibrium phase is insufficiently dissolved, thereby increasing the internal coarse phase, resulting in the appearance of the crack source, controlling the transfer plate not to stay on the roller, and not reserving time for recovery and partial recrystallization, thereby causing a reduction in strength; Comparison Example 4 controls the transfer plate not to stay on the roller, and does not reserve time for recovery and partial recrystallization, thereby causing a reduction in strength; and Comparison Example 5 increases the hot finishing rolling processing rate and Comparison Example 6 reduces the hot finishing rolling processing rate, both of which cannot achieve the optimal balance between strength and plasticity.

[0093] In summary, the present invention can produce 5083 aluminum alloy hot-rolled plates with high strength, high specific strength, good plasticity and good bending properties by reasonably controlling the alloy element content, transfer plate residence time, total hot finishing processing rate, hot rolling final rolling temperature and cooling time after hot rolling. The production method provided by the present invention does not require cold rolling and annealing processes, which can shorten the production process and save costs.

[0094] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A method for producing 5083 aluminum alloy hot-rolled sheet, characterized in that: The process comprises the following steps: melting and casting → sawing → milling → heating → hot rolling → cross-cutting. The aluminum alloy ingot obtained by melting and casting the metal raw material is subjected to sawing and milling treatment, and then subjected to heating treatment. The aluminum alloy hot-rolled coil is then produced by hot rough rolling and hot finish rolling. The aluminum alloy hot-rolled coil is then cut to a fixed length in a cross-cutting machine train to obtain a finished aluminum alloy sheet. In the melting and casting step, the mass percentages of the chemical components of the aluminum alloy ingot are: Si≤0.12%, Fe≤0.25%, Cu≤0.10%, Mn 0.5-0.70%, Mg 4.30-4.60%, Cr 0.05-0.15%, Zn≤0.10%, Ti 0.01-0.05%, other impurity elements individually ≤0.05%, other impurity elements in total ≤0.15%, and the rest is Al.

2. The method for producing 5083 aluminum alloy hot-rolled sheet according to claim 1, characterized in that: In the heating step, the aluminum alloy ingot is heated to a temperature of 510 to 540° C. and the heat preservation time is 3 to 12 hours.

3. The method for producing 5083 aluminum alloy hot-rolled sheet according to claim 1, characterized in that: The hot rolling step includes hot rough rolling and hot finish rolling. The hot finish rolling is carried out by rolling and continuous deformation on four stands to roll the aluminum alloy ingot after hot rough rolling into aluminum alloy hot rolled coil.

4. The method for producing 5083 aluminum alloy hot-rolled sheet according to claim 3, characterized in that: In the hot rolling step, the thickness of the hot rough rolled aluminum alloy ingot is 22-30 mm, and the hot rough rolled aluminum alloy ingot stays on the roller for 5-10 minutes.

5. The method for producing 5083 aluminum alloy hot-rolled sheet according to claim 3, characterized in that: In the hot rolling step, the hot finishing rolling start temperature is 360-430°C, and the aluminum alloy hot rolled coil is 4.0-10.0 mm thick after being continuously rolled through 4 stands, and the hot finishing rolling final rolling temperature is 245-260°C.

6. The method for producing 5083 aluminum alloy hot-rolled sheet according to claim 3, characterized in that: In the hot rolling step, the natural cooling time of the aluminum alloy hot-rolled coil after it comes off the production line is ≥4 hours.

7. The method for producing 5083 aluminum alloy hot-rolled sheet according to claim 3, characterized in that: In the hot rolling step, the hot rough rolling and final rolling temperature is 400-450°C.

8. A 5083 aluminum alloy hot-rolled plate produced by the production method according to any one of claims 1 to 7.

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