Method for producing aluminum alloy clad material for press forming, aluminum alloy clad material for press forming, and press-formed product

Abstract

A method for producing an aluminum alloy clad material for press forming, the aluminum alloy clad material comprising a core material and first and second clad materials bonded to both sides of the core material to sandwich the core material, the method comprising: a step A of forming a first clad material and a second clad material, the first and second clad materials being bonded to both sides of the core material to sandwich the core material; preparing a 5000-series or 6000-series first aluminum alloy using a waste material of an aluminum window frame containing Si, Fe, Cu, and Mg as additive elements; step B, preparing a second aluminum alloy, wherein at least the content of Si and Mg is less than the content of Si and Mg in the first aluminum alloy; step C, forming a plate for a core material by using a first aluminum alloy; a step D of forming a sheet material for the first coating material and a sheet material for the second coating material independently of each other using a second aluminum alloy; and a step E in which rolling is performed in a state in which the sheet material for the first coating material and the sheet material for the second coating material are provided so as to sandwich the sheet material for the core material.

Description

Technical Field

[0001] This invention relates to a method for producing an aluminum alloy cladding material for pressure forming, an aluminum alloy cladding material for pressure forming, and a pressure-formed product. More specifically, it relates to a method for producing an aluminum alloy cladding material for pressure forming with superior recycling efficiency compared to existing technologies, an aluminum alloy cladding material for pressure forming produced by this method, and a pressure-formed product produced using this aluminum alloy cladding material for pressure forming. Background Technology

[0002] In recent years, the demand for resource recycling has been increasing across various sectors. Since aluminum alloys produced through the reduction of bauxite consume a significant amount of electricity, recycling is necessary from the perspectives of resource conservation and cost reduction.

[0003] For example, Patent Document 1 discloses a recycling method comprising: melting recycled aluminum alloy into liquid metal; adding magnesium, silicon, or copper as alloying elements to the liquid metal to form a modified liquid metal; casting the modified liquid metal; and rolling the cast alloy, wherein the modified liquid metal contains 50% or more of recycled aluminum alloy. According to the recycling method described in Patent Document 1, metal products with high strength and high formability can be cast from aluminum alloy scrap.

[0004] List of citations Patent documents Patent Document 1: JP2020-514556A (JP7163304B) Summary of the Invention Technical issues The inventors have studied ways to improve recycling efficiency by limiting the amount of aluminum alloy waste to be recycled and limiting the amount of aluminum alloy produced through recycling. When simply recycling the same type of material repeatedly, there is a problem of increased impurity concentration, and when the material is repeatedly recycled to the same alloy composition, the amount of primary aluminum that needs to be added increases, leading to decreased recycling efficiency.

[0005] The object of this invention is to provide a method for producing aluminum alloy cladding materials for pressure forming that improves recycling efficiency. Another object of this invention is to provide an aluminum alloy cladding material for pressure forming that can be produced by this method, and a pressure-formed product produced using this aluminum alloy cladding material for pressure forming.

[0006] Solution to the problem According to embodiments of the present invention, solutions described in the following items are provided.

[0007] [Item 1] A method for producing an aluminum alloy cladding material for pressure forming, the aluminum alloy cladding material comprising a core material and a first cladding material and a second cladding material, the first cladding material and the second cladding material being bonded to both sides of the core material to sandwich the core material, the method comprising: Step A: Use aluminum window frame scrap containing Si, Fe, Cu and Mg as additive elements to prepare 5000 series or 6000 series first aluminum alloys. Step B: Prepare a second aluminum alloy, wherein the content of Si and Mg is less than that of Si and Mg in the first aluminum alloy; Step C: Form a sheet for the core material using the first aluminum alloy; Step D, using a second aluminum alloy to independently form sheets for the first cladding material and sheets for the second cladding material; and Step E involves rolling the sheet material for the first cladding material and the sheet material for the second cladding material in a state where the sheet material for the core material is sandwiched between them.

[0008] In addition to Si and Mg, the second aluminum alloy may further include at least one element selected from the group consisting of Fe, Cu, Mn, Zn, Cr, and Ti. Mn, Zn, Cr, and Ti contribute to the hue and / or strength of the aluminum after anodizing.

[0009] [Item 2] According to the production method of item 1, the aluminum window frame waste contains: 0.44% or more and 0.56% or less Si, 0.17% or more and 0.30% or less Fe, 0.01% or more and 0.05% or less Cu, and 0.21% or more and 0.56% or less Mg.

[0010] [Item 3] According to the production method of item 1 or item 2, wherein the first aluminum alloy contains 10% or more of waste by mass.

[0011] [Item 4] According to the production method of item 1 or item 2, the first aluminum alloy contains 50% or more of waste by mass.

[0012] [Item 5] According to the production method of any one of items 1 to 4, wherein step A includes the step of adding any additive element and / or primary aluminum, such that the first aluminum alloy is a 5000 series aluminum alloy containing Si: 0.4% by mass or more of Si, 0.1% by mass or more of Fe, 0.01% by mass or more of Cu, and 2.1% by mass or more of Mg, with the balance being aluminum and unavoidable impurities.

[0013] [Item 6] According to the production method of item 5, step A includes the step of adding any additive elements and / or primary aluminum, such that the first aluminum alloy contains: 0.8% by mass or less Si, 0.4% by mass or less Fe, 0.1% by mass or less Cu, and 2.7% by mass or less Mg.

[0014] [Item 7] According to the production method of any one of items 1 to 4, wherein step A includes the step of adding any additive element and / or primary aluminum, such that the first aluminum alloy is a 6000 series aluminum alloy containing: 0.4% by mass or more of Si, 0.1% by mass or more of Fe, 0.01% by mass or more of Cu, and 0.4% by mass or more of Mg, with the balance being aluminum and unavoidable impurities.

[0015] [Item 8] According to the production method of item 7, step A includes the step of adding any additive elements and / or primary aluminum, such that the first aluminum alloy contains 0.8% by mass or less Si, 0.4% by mass or less Fe, 0.1% by mass or less Cu, and 0.6% by mass or less Mg.

[0016] [Item 9] According to the production method of any one of items 1 to 8, the sheet for the first cladding material and the sheet for the second cladding material are formed by dividing a sheet for the cladding material formed using a second aluminum alloy.

[0017] [Item 10] An aluminum alloy cladding material for pressure forming, comprising: core material; and A first cladding material and a second cladding material are bonded to both sides of the core material to sandwich the core material, wherein... The core material is formed of 5000 series aluminum alloy, which contains: 0.4% by mass or more Si, 0.1% by mass or more Fe, 0.01% by mass or more Cu, and 2.1% by mass or more Mg, with the balance being aluminum and unavoidable impurities. The first cladding material and the second cladding material are each independently formed of an aluminum alloy, wherein the aluminum alloy has a lower content of Si and Mg than the core material.

[0018] In addition to Si and Mg, the first and second coating materials may further contain at least one element selected from the group consisting of Fe, Cu, Mn, Zn, Cr and Ti.

[0019] [Item 11] According to the cladding material of item 10, the aluminum alloy of the core material contains: 0.8% or less Si by mass, 0.4% or less Fe by mass, 0.1% or less Cu by mass, and 2.7% or less Mg by mass.

[0020] [Item 12] An aluminum alloy cladding material for pressure forming, comprising: core material; and A first cladding material and a second cladding material are bonded to both sides of the core material to sandwich the core material, wherein... The core material is formed of 6000 series aluminum alloy, which contains: 0.4% by mass or more Si, 0.1% by mass or more Fe, 0.01% by mass or more Cu, and 0.4% by mass or more Mg, with the balance being aluminum and unavoidable impurities. The first cladding material and the second cladding material are each independently formed of an aluminum alloy, wherein the aluminum alloy has a lower content of Si and Mg than the core material.

[0021] In addition to Si and Mg, the first and second coating materials may further contain at least one element selected from the group consisting of Fe, Cu, Mn, Zn, Cr and Ti.

[0022] [Item 13] According to the cladding material of item 12, the aluminum alloy of the core material contains: 0.8% or less Si by mass, 0.4% or less Fe by mass, 0.1% or less Cu by mass, and 0.6% or less Mg by mass.

[0023] [Item 14] A pressure-formed product manufactured using an aluminum alloy cladding material for pressure forming according to any one of claims 10 to 13.

[0024] [Item 15] According to the production method of item 1, the waste from the pressure-formed product according to item 14 is used instead of the waste from the aluminum window frame.

[0025] Advantages of the invention According to one embodiment of the present invention, a method for producing an aluminum alloy cladding material for pressure forming can be provided, which can improve recycling efficiency. According to another embodiment of the present invention, an aluminum alloy cladding material for pressure forming that can be produced by this production method can be provided, as well as a pressure-formed product produced using this aluminum alloy cladding material for pressure forming. Detailed Implementation

[0026] The following describes a method for producing an aluminum alloy cladding material for pressure forming, an aluminum alloy cladding material for pressure forming, and a pressure-formed product according to embodiments of the present invention.

[0027] The method for producing aluminum alloy cladding materials for pressure forming according to embodiments of the present invention improves recycling efficiency by using aluminum window frame waste as the aluminum alloy raw material to be recycled.

[0028] The aluminum alloy cladding material for pressure forming, produced by the manufacturing method according to an embodiment of the present invention, includes a core material and a first cladding material and a second cladding material, wherein the first cladding material and the second cladding material are bonded to both sides of the core material to sandwich the core material. The manufacturing method according to an embodiment of the present invention includes the following steps.

[0029] 5000 or 6000 series first aluminum alloys are prepared using aluminum window frame scrap containing Si, Fe, Cu, and Mg as additive elements. The first aluminum alloy is then used to form sheets for the core material.

[0030] A second aluminum alloy is prepared, wherein the contents of at least Si and Mg are less than those of the first aluminum alloy. The second aluminum alloy is used to form a sheet for forming a first cladding material and a sheet for forming a second cladding material. The second aluminum alloy used to form the sheet for the first cladding material and the sheet for the second cladding material can be selected independently. That is, the sheet for the first cladding material and the sheet for the second cladding material can have different compositions or the same composition. From a productivity perspective, the sheet for the first cladding material and the sheet for the second cladding material are preferably formed by splitting a sheet for forming the cladding material using the second aluminum alloy.

[0031] Rolling is performed with a sheet material for the first cladding material and a sheet material for the second cladding material positioned to sandwich a sheet material for the core material. The rolling step can be a hot rolling step and / or a cold rolling step. Through the rolling step, an aluminum alloy cladding material for pressure forming, comprising a core material, a first cladding material, and a second cladding material, is obtained. The obtained aluminum alloy cladding material for pressure forming can be heat-treated as needed.

[0032] Examples of heat treatment include four types: homogenization treatment performed after ingot casting and before hot rolling; intermediate heat treatment performed after hot rolling and before cold rolling; solution treatment performed after cold rolling; and artificial aging treatment performed after solution treatment. Note that the intermediate heat treatment may be omitted.

[0033] To improve the formability of aluminum alloy sheets used for pressure forming, heat treatment is performed to uniformly disperse fine crystalline precipitates.

[0034] For example, homogenization treatment is carried out at a temperature of about 500°C or higher and about 600°C or lower, above the solid solubility limit, for about 24 hours or less. When it is longer than about 24 hours, the crystal precipitates can become coarser. In addition, when the treatment temperature is below about 500°C, it takes longer and the throughput is reduced.

[0035] For example, intermediate heat treatment is performed at about 300°C or higher and about 500°C or lower, preferably about 400°C. For example, the heat treatment time is about 2 hours or longer and about 24 hours or less. Intermediate heat treatment can reduce the size of crystal precipitates formed during the hot rolling step, reduce the strain generated during the hot rolling step, and allow recrystallization. Intermediate heat treatment can be omitted.

[0036] Solution treatment is performed to fully dissolve the crystalline precipitates generated by rolling, etc., through heating. Solution treatment is preferably carried out at a temperature below the solidus line and preferably above the solubility limit. The heat treatment time is, for example, longer than about 0 seconds and 12 hours or less. After solution treatment, cooling is preferably performed by air cooling or water cooling to prevent the dissolved crystalline precipitates from redepositing.

[0037] Artificial aging is performed at a temperature of about 100°C or higher and about 200°C or lower for about 4 hours or longer and about 24 hours or less. By using artificial aging to precipitate elements contained in the solid solution in a supersaturated state, the strength can be made close to the target strength.

[0038] The steps for preparing the first aluminum alloy will be described. The first aluminum alloy is used to form a sheet for the core material, which will become the core material for pressure forming of the aluminum alloy cladding material. As the first aluminum alloy, scrap aluminum window frames containing Si, Fe, Cu, and Mg as additive elements are used. The scrap aluminum window frames, for example, contain: 0.44% by mass or more and 0.56% by mass or less Si, 0.17% by mass or more and 0.30% by mass or less Fe, 0.01% by mass or more and 0.05% by mass or less Cu, and 0.21% by mass or more and 0.56% by mass or less Mg. The composition of the scrap is determined by melting the scrap and following a method conforming to JISH 1351-1972.

[0039] Adding any additive elements and / or primary aluminum, such that the first aluminum alloy is, for example, a 5000 series aluminum alloy containing: 0.4% by mass or more Si, 0.1% by mass or more Fe, 0.01% by mass or more Cu, and 2.1% by mass or more Mg, with the balance being aluminum and unavoidable impurities. Furthermore, adding any additive elements and / or primary aluminum, such that the first aluminum alloy contains, for example: 0.8% by mass or less Si, 0.4% by mass or less Fe, 0.1% by mass or less Cu, and 2.7% by mass or less Mg.

[0040] Optionally, any additive elements and / or primary aluminum are added to make the first aluminum alloy a 6000 series aluminum alloy containing: 0.4% by mass or more Si, 0.1% by mass or more Fe, 0.01% by mass or more Cu, and 0.4% by mass or more Mg, with the balance being aluminum and unavoidable impurities. Furthermore, any additive elements and / or primary aluminum are added to make the first aluminum alloy contain: 0.8% by mass or less Si, 0.4% by mass or less Fe, 0.1% by mass or less Cu, and 0.6% by mass or less Mg.

[0041] The first aluminum alloy preferably contains 10% by mass or more, more preferably 30% by mass or more, and even more preferably 50% by mass or more of scrap. The higher the mass fraction of scrap, the smaller the amount of primary aluminum added.

[0042] The content of at least Si and Mg in the second aluminum alloy (also referred to as the second content) is less than the content of Si and Mg in the first aluminum alloy (also referred to as the first content). The additive elements in the second aluminum alloy, including at least Si and Mg, are increased by using scrap from pressure-formed products produced using aluminum alloy cladding materials for pressure forming. In addition to Si and Mg, the additive elements in the second aluminum alloy may also include at least one element selected from the group consisting of Fe, Cu, Mn, Zn, Cr, and Ti. In this case, the content of Si and Mg in the second aluminum alloy, as well as the content of at least one element selected from the group consisting of Fe, Cu, Mn, Zn, Cr, and Ti (the second content), may be less than the content in the first aluminum alloy (the first content), or the content of at least one element selected from the group consisting of Fe, Cu, Mn, Zn, Cr, and Ti, other than Si and Mg, may not be less than the first content.

[0043] According to the above production method, an aluminum alloy cladding material for pressure forming can be obtained, comprising: a core material; and a first cladding material and a second cladding material, the first cladding material and the second cladding material being bonded to both sides of the core material to sandwich the core material, wherein the core material is formed of a 5000 series aluminum alloy containing: 0.4% by mass or more Si, 0.1% by mass or more Fe, 0.01% by mass or more Cu, and 2.1% by mass or more Mg, with the balance being aluminum and unavoidable impurities, and the first cladding material and the second cladding material are each independently formed of an aluminum alloy having at least a lower Si and Mg content than that in the core material. For example, the aluminum alloy of the core material contains: 0.8% by mass or less Si, 0.4% by mass or less Fe, 0.1% by mass or less Cu, and 2.7% by mass or less Mg.

[0044] Optionally, according to the above production method, an aluminum alloy cladding material for pressure forming can be obtained, comprising: a core material; and a first cladding material and a second cladding material, the first cladding material and the second cladding material being bonded to both sides of the core material to sandwich the core material, wherein the core material is formed of a 6000 series aluminum alloy containing: 0.4% by mass or more Si, 0.1% by mass or more Fe, 0.01% by mass or more Cu, and 0.4% by mass or more Mg, with the balance being aluminum and unavoidable impurities, and the first cladding material and the second cladding material are each independently formed of an aluminum alloy having at least a lower Si and Mg content than that in the core material. For example, the aluminum alloy of the core material contains: 0.8% by mass or less Si, 0.4% by mass or less Fe, 0.1% by mass or less Cu, and 0.6% by mass or less Mg.

[0045] In the entire aluminum alloy cladding material used for pressure forming, the content of at least Si and Mg in each of the added elements of the first aluminum alloy is adjusted to not exceed the upper limit of the first content. Therefore, even when the waste from the pressure-formed product produced using the aluminum alloy cladding material for pressure forming contains impurities and the content of at least Si and Mg in the waste increases, the excess of the upper limit of the first content can be suppressed or the amount exceeding the upper limit of the first content can be reduced. Therefore, in the above-described method for producing the cladding material, when the waste from the pressure-formed product produced using the above-described aluminum alloy cladding material for pressure forming is used instead of the waste from the aluminum window frame, the amount of primary aluminum required to prepare the first aluminum alloy can be reduced, and the recycling efficiency can be improved.

[0046] The first and second contents in the method for producing aluminum alloy cladding material for pressure forming according to embodiments of the present invention are based on the thickness of the core material, the thickness of the first cladding material and the second cladding material, the desired properties of the core material, the first cladding material and the second cladding material, and the content of excess additive elements including at least Si and Mg contained in the waste.

[0047] The core material has a thickness of, for example, 0.1 mm or more and 10.0 mm or less, and the first and second cladding materials each have a thickness of, for example, 0.005 mm or more and 3 mm or less. The cladding material has a thickness of, for example, about 5% or more and about 30% or less of the core material thickness.

[0048] In the case of the 6000 series, the composition of the first aluminum alloy is, for example: Si: 0.44% by mass or more and 0.56% by mass or less, Fe: 0.17% by mass or more and 0.30% by mass or less, Cu: 0.01% by mass or more and 0.05% by mass or less, and Mg: 0.21% by mass or more and 0.56% by mass or less.

[0049] In the case of the 5000 series, the composition of the first aluminum alloy is, for example: Si: 0.44% by mass or more and 0.56% by mass or less, Fe: 0.17% by mass or more and 0.30% by mass or less, Cu: 0.01% by mass or more and 0.05% by mass or less, and Mg: greater than 0.0% by mass and 2.7% by mass or less.

[0050] When the additive elements, Si and Mg, are excessively included in the first aluminum alloy through the use of scrap, the composition of the second aluminum alloy is, for example: Si: 0.20% by mass or more and 0.55% by mass or less, Fe: greater than 0.0% by mass and 0.27% by mass or less, Cu: greater than 0.0% by mass and 0.04% by mass or less, and Mg: 0.20% by mass or more and 0.55% by mass or less.

[0051] When the first and second cladding materials exhibit improved pressure formability (surface quality) and / or improved surface finish, the composition of the second aluminum alloy can be adjusted, for example, as follows.

[0052] Si: 0.20% by mass or more and 0.50% by mass or less, Fe: greater than 0.0% by mass and 0.25% by mass or less, Cu: greater than 0.0% by mass and 0.03% by mass or less, and Mg: 0.20% by mass or more and 0.55% by mass or less.

[0053] The second aluminum alloy may not contain any of the aforementioned additive elements. In the second aluminum alloy, the content of one or more additive elements that will be excessively included in the scrap may be less than the content of one or more additive elements in the first aluminum alloy. Depending on the desired properties of the first and second cladding materials, the second aluminum alloy may contain one or more additive elements (e.g., Zn, Mn, Cr, Ti, Ga, and Ni) in a greater quantity than in the first aluminum alloy. Note that the content of these additive elements does not exceed 0.05% by mass. Furthermore, both the first and second aluminum alloys may contain additive elements other than those listed in the examples.

[0054] The aluminum alloy cladding material for pressure forming according to embodiments of the present invention can be produced by known methods (e.g., see JPH01-252759A). The entire disclosure of JPH01-252759A is incorporated herein by reference. The melting, casting, rolling, and heat treatment (annealing, etc.) of aluminum alloy raw materials, including scrap, can be performed by known methods.

[0055] The aluminum alloy cladding material for pressure forming according to embodiments of the present invention can be suitably used to produce a variety of pressure-formed products (e.g., housings of automobiles such as bumpers and front ends, housings of electronic devices such as smartphones, tablet terminals, and laptops). Furthermore, waste from pressure-formed products produced using the aluminum alloy cladding material for pressure forming according to embodiments of the present invention is suitable for use in producing the aluminum alloy cladding material for pressure forming according to embodiments of the present invention.

[0056] Industrial applicability The method for producing aluminum alloy cladding material for pressure forming, the pressure-formed aluminum alloy cladding material, and the pressure-formed product according to embodiments of the present invention can improve the recycling efficiency of aluminum alloy materials. Embodiments of the present invention can be combined with known recycling methods, such as those described in Patent Document 1.

Claims

1. A method for producing an aluminum alloy cladding material for pressure forming, the aluminum alloy cladding material comprising a core material, a first cladding material, and a second cladding material, the first cladding material and the second cladding material being bonded to both sides of the core material to enclose the core material, the method comprising: Step A: Use aluminum window frame scrap containing Si, Fe, Cu and Mg as additive elements to prepare 5000 series or 6000 series first aluminum alloys. Step B: Prepare a second aluminum alloy, wherein the content of Si and Mg is less than that of Si and Mg in the first aluminum alloy; Step C: Use the first aluminum alloy to form a sheet for the core material; Step D: Using the second aluminum alloy, sheets for the first cladding material and sheets for the second cladding material are formed independently of each other; as well as Step E involves rolling the sheet material for the first cladding material and the sheet material for the second cladding material in a state where they are positioned to sandwich the sheet material for the core material.

2. The production method according to claim 1, wherein, The scrap aluminum window frame contains: 0.44% or more and 0.56% or less Si, 0.17% or more and 0.30% or less Fe, 0.01% or more and 0.05% or less Cu, and 0.21% or more and 0.56% or less Mg.

3. The production method according to claim 1 or 2, wherein, The first aluminum alloy contains 10% by mass or more of the scrap.

4. The production method according to claim 1 or 2, wherein, The first aluminum alloy contains 50% by mass or more of the scrap.

5. The production method according to claim 1 or 2, wherein, Step A includes adding any of the added elements and / or primary aluminum, such that the first aluminum alloy is a 5000 series aluminum alloy, and the 5000 series aluminum alloy contains: 0.4% by mass or more of Si, 0.1% by mass or more of Fe, 0.01% by mass or more of Cu, and 2.1% by mass or more of Mg, with the balance being aluminum and unavoidable impurities.

6. The production method according to claim 5, wherein, Step A includes adding any of the added elements and / or the primary aluminum, such that the first aluminum alloy contains: 0.8% by mass or less Si, 0.4% by mass or less Fe, 0.1% by mass or less Cu, and 2.7% by mass or less Mg.

7. The production method according to claim 1 or 2, wherein, Step A includes adding any of the added elements and / or primary aluminum, such that the first aluminum alloy is a 6000 series aluminum alloy, and the 6000 series aluminum alloy contains: 0.4% by mass or more of Si, 0.1% by mass or more of Fe, 0.01% by mass or more of Cu, and 0.4% by mass or more of Mg, with the balance being aluminum and unavoidable impurities.

8. The production method according to claim 7, wherein, Step A includes adding any of the added elements and / or the primary aluminum, such that the first aluminum alloy contains: 0.8% by mass or less Si, 0.4% by mass or less Fe, 0.1% by mass or less Cu, and 0.6% by mass or less Mg.

9. The production method according to claim 1 or 2, wherein, The sheet material for the first cladding material and the sheet material for the second cladding material are formed by dividing a sheet material for the cladding material formed using the second aluminum alloy.

10. An aluminum alloy cladding material for pressure forming, comprising: core material; and A first cladding material and a second cladding material are bonded to both sides of the core material to enclose the core material, wherein... The core material is formed of a 5000 series aluminum alloy, wherein the 5000 series aluminum alloy contains: 0.4% by mass or more Si, 0.1% by mass or more Fe, 0.01% by mass or more Cu, and 2.1% by mass or more Mg, with the balance being aluminum and unavoidable impurities. The first cladding material and the second cladding material are each independently formed of an aluminum alloy, wherein the aluminum alloy has a lower content of at least Si and Mg than the content of Si and Mg in the core material.

11. The coating material according to claim 10, wherein, The aluminum alloy of the core material contains: 0.8% by mass or less Si, 0.4% by mass or less Fe, 0.1% by mass or less Cu, and 2.7% by mass or less Mg.

12. An aluminum alloy cladding material for pressure forming, comprising: core material; and A first cladding material and a second cladding material are bonded to both sides of the core material to enclose the core material, wherein... The core material is formed of a 6000 series aluminum alloy, wherein the 6000 series aluminum alloy contains: 0.4% by mass or more Si, 0.1% by mass or more Fe, 0.01% by mass or more Cu, and 0.4% by mass or more Mg, with the balance being aluminum and unavoidable impurities. The first cladding material and the second cladding material are each independently formed of an aluminum alloy, wherein the aluminum alloy has a lower content of at least Si and Mg than the content of Si and Mg in the core material.

13. The coating material according to claim 12, wherein, The aluminum alloy of the core material contains: 0.8% or less Si, 0.4% or less Fe, 0.1% or less Cu, and 0.6% or less Mg.

14. A pressure-formed product manufactured using an aluminum alloy cladding material for pressure forming according to any one of claims 10 to 13.

15. The production method according to claim 1, wherein, The waste material of the pressure-formed product according to claim 14 is used instead of the waste material of the aluminum window frame.