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WO2025204214A1 - Matériau en feuille d'alliage d'aluminium - Google Patents

Matériau en feuille d'alliage d'aluminium

Info

Publication number
WO2025204214A1
WO2025204214A1 PCT/JP2025/004476 JP2025004476W WO2025204214A1 WO 2025204214 A1 WO2025204214 A1 WO 2025204214A1 JP 2025004476 W JP2025004476 W JP 2025004476W WO 2025204214 A1 WO2025204214 A1 WO 2025204214A1
Authority
WO
WIPO (PCT)
Prior art keywords
aluminum alloy
mass
phase
alloy sheet
alfemnsi
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2025/004476
Other languages
English (en)
Japanese (ja)
Inventor
喜文 新里
英貴 中西
裕貴 山崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UACJ Corp
Original Assignee
UACJ Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UACJ Corp filed Critical UACJ Corp
Publication of WO2025204214A1 publication Critical patent/WO2025204214A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/05—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions

Definitions

  • the present invention relates to aluminum alloy sheet materials used for automobile body panels, etc.
  • virgin aluminum ingots have been used as the casting raw material, and elements such as Si and Mg have been added to adjust the chemical composition to a desired range.
  • virgin aluminum ingots consume a large amount of electricity during production, using them as a casting raw material results in large amounts of CO2 emissions from the electricity, which increases the environmental impact.
  • achieving carbon neutrality has become a social issue worldwide in recent years, so it is becoming increasingly important to reduce the amount of virgin aluminum used.
  • 6000 series aluminum alloy sheet materials which have excellent formability and bake hardness (BH), are used for automobile body panels.
  • 6000 series aluminum alloy sheet materials contain fewer alloying elements than other aluminum alloys, making them suitable for recycling, as the original 6000 series aluminum alloy ingots can be easily obtained when they are reused as aluminum alloy melting materials (see, for example, Patent Document 1).
  • Al-Mg-Si aluminum alloys such as the 6000 series, that can be manufactured using scrap aluminum alloy material and that have excellent bendability, etc.
  • an object of the present invention is to provide an aluminum alloy sheet material that can be manufactured using scrap aluminum alloy material and has excellent bendability.
  • the inventors discovered that due to the Fe content of scrap aluminum alloy material, the aluminum alloy material produced using this scrap has a reduced ratio of the ⁇ -AlFeMnSi phase in the second-phase particles of the aluminum alloy, resulting in reduced performance (bendability). They then discovered that by appropriately adjusting the composition of the aluminum alloy and optimizing the production method to increase the ratio of the ⁇ -AlFeMnSi phase in the second-phase particles, and by appropriately adjusting the composition of the aluminum alloy to increase its strength, it is possible to obtain aluminum alloy sheet material with excellent bendability, even when using scrap aluminum alloy material containing Fe as a manufacturing raw material.
  • the present invention (1) is an aluminum alloy containing 0.50 to 1.50 mass% Si, 0.35 to 0.80 mass% Mg, 0.08 to 0.60 mass% Fe, 0.001 to 0.40 mass% Cu, 0.01 to 0.25 mass% Mn, and more than 0.00 mass% but not more than 0.09 mass% Ti, and optionally containing one or more elements selected from the group consisting of 0.05 mass% or less Cr, 0.05 mass% or less Zn, and 0.05 mass% or less B, with the balance being Al and unavoidable impurities;
  • the present invention (3) also provides:
  • the tensile strength in the 0° direction, 45° direction, and 90° direction relative to the rolling direction is 190 MPa or more,
  • the elongation in the 0° direction, 45° direction, and 90° direction relative to the rolling direction is 23% or more.
  • (1) is an aluminum alloy plate material characterized by the above.
  • the present invention also provides A casting raw material containing a waste aluminum alloy material is used to cast an aluminum alloy ingot containing 0.50 to 1.50 mass% Si, 0.35 to 0.80 mass% Mg, 0.08 to 0.60 mass% Fe, 0.001 to 0.40 mass% Cu, 0.01 to 0.25 mass% Mn, and more than 0.00 mass% but not more than 0.09 mass% Ti, and optionally containing one or more elements selected from the group consisting of not more than 0.05 mass% Cr, not more than 0.05 mass% Zn, and not more than 0.05 mass% B, with the balance being Al and unavoidable impurities;
  • the aluminum alloy ingot is subjected to a homogenization treatment by heating the ingot to 530°C or higher,
  • the homogenized product is hot-rolled at 300 to 580°C,
  • the hot-rolled product is cold-rolled, and if necessary, intermediate annealing is performed before cold rolling or between cold rolling passes;
  • the method for producing an aluminum alloy sheet material is characterized in that the cold-
  • aluminum alloy sheet materials can be manufactured using scrap aluminum alloy material and have excellent bendability.
  • 1 is an X-ray diffraction chart obtained by analyzing an aluminum alloy plate material by X-ray diffraction.
  • the aluminum alloy sheet material of the present invention is an aluminum alloy containing 0.50 to 1.50 mass% Si, 0.35 to 0.80 mass% Mg, 0.08 to 0.60 mass% Fe, 0.001 to 0.40 mass% Cu, 0.01 to 0.25 mass% Mn, and more than 0.00 mass% but not more than 0.09 mass% Ti, and optionally containing one or more elements selected from the group consisting of 0.05 mass% or less Cr, 0.05 mass% or less Zn, and 0.05 mass% or less B, with the balance being Al and unavoidable impurities;
  • Aluminum alloy sheet materials made from the aluminum alloy of the present invention can be produced from 6000 series aluminum alloy material, for example, sash scrap containing 0.20 to 0.60 mass% Si, 0.35 mass% or more Fe, 0.10 mass% or less Cu, 0.10 mass% or less Mn, 0.45 to 0.90 mass% Mg, 0.10 mass% or less Cr, 0.10 mass% or less Zn, and 0.10 mass% or less Ti, as a casting raw material.
  • sash scrap materials that can be used as a casting raw material for aluminum alloy sheet materials made from the aluminum alloy of the present invention include scrap metal and other scrap generated during the rolling and slitting processes used in the production of aluminum alloy material.
  • Scrap alloys other than the 6000 series that can be used as a casting raw material for aluminum alloy sheet materials made from the aluminum alloy of the present invention may also include mixed metals extracted from scrapped vehicles and UBC (used beverage can) scrap.
  • the aluminum alloy of the aluminum alloy sheet material of the present invention contains the essential elements Si, Mg, Fe, Cu, Mn, and Ti, and may optionally contain Cr, Zn, and B.
  • the aluminum alloy of the aluminum alloy sheet material of the present invention is composed of the essential elements, optional additional elements added as needed, and the remainder consisting of aluminum and unavoidable impurities.
  • the aluminum alloy of the present invention contains Si.
  • Si improves strength through the precipitation of Mg-Si intermetallic compounds.
  • the Si content of the aluminum alloy is 0.50 to 1.50 mass%, preferably 0.55 to 1.25 mass%, and more preferably 0.60 to 1.00 mass%.
  • the Si content is adjusted to the above range, thereby increasing the proportion of the second phase ⁇ -AlFeMnSi phase. This results in the aluminum alloy sheet of the present invention having excellent bendability. Si also contributes to improved strength. On the other hand, if the Si content of the aluminum alloy is below the above range, the strength improvement effect will not be sufficient. Furthermore, if the Si content exceeds the above range, coarse Si particles and coarse Mg-Si intermetallic compounds will form, resulting in a decrease in bending workability.
  • the aluminum alloy of the present invention's aluminum alloy sheet contains Mg.
  • Mg improves strength through the precipitation of Mg-Si intermetallic compounds.
  • the Mg content of the aluminum alloy is 0.35 to 0.80 mass%, preferably 0.40 to 0.75 mass%, and more preferably 0.45 to 0.70 mass%. If the Mg content of the aluminum alloy is below this range, the strength improvement effect is insufficient. Furthermore, if the Mg content exceeds this range, the formation of coarse Mg-Si intermetallic compounds leads to a decrease in bending workability.
  • the aluminum alloy of the present invention contains Fe.
  • the Fe content of the aluminum alloy is 0.08 to 0.60 mass%, preferably 0.15 to 0.55 mass%, and more preferably 0.20 to 0.50 mass%.
  • the Fe content in the aluminum alloy sheet increases, reducing the proportion of the second phase, ⁇ -AlFeMnSi, and resulting in reduced bendability. Therefore, in the aluminum alloy sheet of the present invention, the Fe content in the aluminum alloy must be limited to the above range. Fe also contributes to the refinement of crystal grains. If the Fe content of the aluminum alloy is below the above range, coarse crystal grains will form, resulting in rough surfaces during forming. If the Fe content exceeds the above range, coarse intermetallic compounds will form, resulting in reduced bendability.
  • the aluminum alloy of the present invention contains Cu.
  • the Cu content of the aluminum alloy is 0.001 to 0.40% by mass, preferably 0.02 to 0.10% by mass, and more preferably 0.02 to 0.08% by mass.
  • the aluminum alloy scrap often contains Cu, and the inclusion of Cu in the aluminum alloy sheet is unavoidable.
  • the Cu content in the aluminum alloy sheet is too high, bendability decreases. Therefore, in the aluminum alloy sheet of the present invention, the Cu content in the aluminum alloy must be limited to the above range.
  • Cu contributes to improved strength and formability. If the Cu content of the aluminum alloy is less than the above range, strength and formability will be insufficient, and if it exceeds the above range, filiformity resistance will deteriorate.
  • the aluminum alloy of the present invention contains Mn.
  • Mn contributes to the refinement of crystal grains.
  • Mn forms Al-Mn-Si intermetallic compounds, improving strength through dispersion strengthening, and dissolves in the aluminum matrix, improving strength through solid solution strengthening.
  • the Mn content of the aluminum alloy is 0.01 to 0.25 mass%, preferably 0.02 to 0.20 mass%, and more preferably 0.04 to 0.15 mass%.
  • waste aluminum alloy material When waste aluminum alloy material is used as the raw material for ingot production of aluminum alloy sheet, the waste aluminum alloy material often contains Mn, and the inclusion of Mn in the aluminum alloy sheet is unavoidable. However, if the Mn content in the aluminum alloy sheet is too high, coarse intermetallic compounds are formed, resulting in reduced formability.
  • the Mn content in the aluminum alloy must be limited to the above range. If the Mn content of the aluminum alloy is less than the above range, coarse crystal grains are formed, resulting in rough surfaces during forming. Furthermore, if the content exceeds the above range, coarse intermetallic compounds will form, causing a decrease in bendability.
  • the aluminum alloy of the aluminum alloy sheet material of the present invention contains Ti.
  • Ti has the effect of improving strength through solid solution strengthening and refining the ingot structure.
  • the Ti content of the aluminum alloy is more than 0.00 mass% and not more than 0.09 mass%, preferably 0.01 to 0.08 mass%, and more preferably 0.02 to 0.07 mass%. If the Ti content of the aluminum alloy exceeds the above range, coarse intermetallic compounds are formed, which adversely affects formability.
  • the second phase particles (precipitates) of the aluminum alloy according to the present invention's aluminum alloy sheet material include the ⁇ -AlFeMnSi phase and the ⁇ -AlFeMnSi phase.
  • the ⁇ -AlFeMnSi phase which has a body-centered cubic structure
  • the ⁇ -AlFeMnSi phase which has a monoclinic structure.
  • Whether the second phase particles are the ⁇ -AlFeMnSi phase or the ⁇ -AlFeMnSi phase can be determined by X-ray diffraction analysis.
  • an aluminum alloy sheet can be obtained that combines recyclability, which allows it to be produced using scrap aluminum alloy material, with strength, toughness, and bendability. That is, the aluminum alloy according to the aluminum alloy sheet of the present invention contains Fe derived from, for example, scrap aluminum alloy material, which reduces the proportion of the ⁇ -AlFeMnSi phase in the second-phase particles of the aluminum alloy that forms the aluminum alloy sheet, thereby reducing performance (toughness and bendability).
  • an aluminum alloy sheet with excellent strength, toughness, and bendability can be obtained.
  • the Si content to 0.50 to 1.50 mass % and the Fe content to 0.08 to 0.60 mass %
  • the homogenization treatment temperature in production to 530°C or higher, preferably 540 to 590°C, and more preferably 555 to 590°C
  • the proportion of the ⁇ -AlFeMnSi phase in the second phase particles can be increased, and an aluminum alloy sheet material excellent in strength, toughness, and bendability can be obtained.
  • the proportion of the ⁇ -AlFeMnSi phase in the second-phase particles is calculated from the obtained intensity integral values.
  • the aluminum alloy sheet material of the present invention preferably has a Cube orientation concentration of 10.0 or more, more preferably 15.0 or more, in a cross section parallel to the rolling direction, i.e., across the entire sheet thickness in the ND-TD plane.
  • the ND-TD plane is a cross section parallel to the rolling direction, and the Cube orientation concentration is expressed as a ratio to the concentration in a sample with random orientation. Having the Cube orientation concentration within the above range enhances recyclability, allowing production using scrap aluminum alloy, and improves bendability.
  • the upper limit of the concentration of Cube orientation in the ND-TD plane throughout the entire sheet thickness is not particularly limited, but may be, for example, 150 or less.
  • the aluminum alloy sheet material of the present invention has a tensile strength of 190 MPa or more, preferably 195 MPa or more, and more preferably 200 MPa or more in the 0°, 45°, and 90° directions relative to the rolling direction. Sufficient formability can be ensured by ensuring that the tensile strength in all three directions is within the above range and that the elongation is 23% or more. If the strength and elongation in at least one of the three directions is low, fracture will occur in the direction with the low strength and elongation during forming, making it impossible to ensure sufficient formability. Furthermore, having low strength and elongation in at least one direction will exhibit anisotropy, leading to reduced formability.
  • the aluminum alloy sheet material of the present invention has elongation of 23% or more, preferably 24% or more, and more preferably 25% or more in all directions at 0°, 45°, and 90° relative to the rolling direction. Having elongation in all three directions within the above ranges ensures sufficient formability. If elongation in at least one of the three directions is low, fracture or necking will occur in the direction with low elongation during forming, making it impossible to ensure sufficient formability. Furthermore, having low elongation in at least one direction means that the material exhibits anisotropy, which leads to reduced formability.
  • the aluminum alloy sheet material of the present invention is used for automobile body panels, hoods, doors, fenders, etc.
  • the aluminum alloy sheet material of the present invention has high upper limits for elements such as Fe and Cu, so when it becomes waste material, it can easily be reused as part of the casting raw material. Therefore, it is suitable for use as the casting raw material in the manufacturing method of the aluminum alloy sheet material of the present invention described below.
  • the aluminum alloy sheet material of the present invention is, for example, A casting raw material containing a waste aluminum alloy material is used to cast an aluminum alloy ingot containing 0.50 to 1.50 mass% Si, 0.35 to 0.80 mass% Mg, 0.08 to 0.60 mass% Fe, 0.001 to 0.40 mass% Cu, 0.01 to 0.25 mass% Mn, and more than 0.00 mass% but not more than 0.09 mass% Ti, and optionally containing one or more elements selected from the group consisting of not more than 0.05 mass% Cr, not more than 0.05 mass% Zn, and not more than 0.05 mass% B, with the balance being Al and unavoidable impurities;
  • the aluminum alloy ingot is subjected to a homogenization treatment by heating the ingot to 530°C or higher,
  • the homogenized product is hot-rolled at 300 to 580°C,
  • the hot-rolled product is cold-rolled, and if necessary, intermediate annealing is performed before cold rolling or between cold rolling passes;
  • the cold rolled product can be produced
  • the method for producing an aluminum alloy sheet material of the present invention is as follows: A casting raw material containing a waste aluminum alloy material is used to cast an aluminum alloy ingot containing 0.50 to 1.50 mass% Si, 0.35 to 0.80 mass% Mg, 0.08 to 0.60 mass% Fe, 0.001 to 0.40 mass% Cu, 0.01 to 0.25 mass% Mn, and more than 0.00 mass% but not more than 0.09 mass% Ti, and optionally containing one or more elements selected from the group consisting of not more than 0.05 mass% Cr, not more than 0.05 mass% Zn, and not more than 0.05 mass% B, with the balance being Al and unavoidable impurities;
  • the aluminum alloy ingot is subjected to a homogenization treatment by heating the ingot to 530°C or higher,
  • the homogenized product is hot-rolled at 300 to 580°C,
  • the hot-rolled product is cold-rolled, and if necessary, intermediate annealing is performed before cold rolling or between cold rolling passes;
  • an aluminum alloy ingot is cast using a casting raw material containing scrap aluminum alloy material, preferably a casting raw material in which the proportion of scrap aluminum alloy material used is 10 mass % or more, more preferably 30 mass % or more.
  • scrap aluminum alloy material is used as part of the casting raw material.
  • Waste aluminum alloy materials used as the casting raw material in the casting method for manufacturing aluminum alloy sheet material of the present invention include Mg-containing aluminum alloy materials, for example, waste Al-Mg-Si aluminum alloy materials such as 6000 series aluminum alloy materials.
  • waste Al-Mg-Si aluminum alloy materials such as 6000 series aluminum alloy materials.
  • 6000 series aluminum alloy materials such as sash scrap containing 0.20 to 0.60 mass% Si, 0.35 mass% or more Fe, 0.10 mass% or less Cu, 0.10 mass% or less Mn, 0.45 to 0.90 mass% Mg, 0.10 mass% or less Cr, 0.10 mass% or less Zn, and 0.10 mass% or less Ti.
  • Examples of aluminum alloy scrap include scrap metal and other scrap metal generated during the rolling and slitting processes during the production of aluminum alloy materials, automobile body panels from scrapped cars or unused in production, mixed metal and UBC (used beverage can) scrap recovered from scrapped cars, etc.
  • the average content of each chemical component in the scrap aluminum alloy material used as the casting raw material (the ratio of the total amount of each chemical component contained in the scrap aluminum alloy material to the total mass of the scrap aluminum alloy material used in casting) can be, for example, as follows: Si content: 0.20 to 0.60 mass%, Mg content: 0.45 to 0.90 mass%, Fe content: 0.35 mass% or less, Cu content: 0.10 mass% or less, Mn content: 0.10 mass% or less, Ti content: 0.10 mass% or less, Zn content: 0.10 mass% or less, Cr content: 0.10 mass% or less.
  • the scrap aluminum alloy material used as the casting raw material may also contain unavoidable impurities.
  • 0.50 to 1.50 mass% preferably 0.55 to 1.25 mass%, more preferably 0.60 to 1.00 mass% Si, 0.35 to 0.80 mass%, preferably 0.45 to 0.75 mass%, more preferably 0.50 to 0.70 mass% Mg, 0.08 to 0.60 mass%, preferably 0.15 to 0.55 mass%, more preferably 0.20 to 0.50 mass% Fe, and 0.001 to 0.40 mass%, preferably 0.01 to 0.30 mass%, more preferably 0.02 to 0.20 mass%, more preferably 0.
  • An aluminum alloy ingot is produced, containing 0.02 to 0.10 mass%, preferably 0.02 to 0.08 mass%, Cu; 0.01 to 0.25 mass%, preferably 0.02 to 0.20 mass%, more preferably 0.04 to 0.15 mass%, Mn; more than 0.00 mass% but not more than 0.09 mass%, preferably 0.01 to 0.08 mass%, more preferably 0.02 to 0.07 mass%, Ti; and optionally one or more elements selected from the group consisting of 0.05 mass% or less Cr, 0.05 mass% or less Zn, and 0.05 mass% or less B, with the balance being Al and unavoidable impurities.
  • the casting method used in the production of aluminum alloy sheet material of the present invention is not particularly limited, and conventional casting methods and casting conditions can be selected as appropriate.
  • the aluminum alloy ingot is then subjected to a homogenization treatment in which it is heated to 530°C or higher, preferably 540 to 590°C, and more preferably 555 to 590°C, to obtain a homogenized product.
  • the homogenization treatment temperature affects the ratio of ⁇ -AlFeMnSi phase to ⁇ -AlFeMnSi phase in the aluminum alloy second phase particles of the aluminum alloy sheet material, and by keeping the homogenization treatment temperature within the above range, the ratio of ⁇ -AlFeMnSi phase can be increased.
  • the hot-rolled product is then cold-rolled to obtain a cold-rolled product.
  • cold rolling may be performed in one pass, or two or more cold rolling passes may be performed.
  • intermediate annealing may be performed between passes by heating at 250 to 550°C, preferably 300 to 500°C, for 0.5 hours or more.
  • the total rolling reduction in cold rolling is 50% or more, preferably 60% or more.
  • the cold-rolled product is then subjected to solution treatment at 500 to 600°C, preferably 520 to 580°C, for 2 to 30 seconds, preferably 5 to 25 seconds.
  • solution treatment the cold-rolled product is held at the above temperature range for the above holding time, and then cooled at a rate of 1°C/second or more.
  • the solution-treated product obtained after the solution treatment is then subjected to pre-aging at 30 to 150°C, preferably 50 to 130°C, to obtain an aluminum alloy sheet.
  • the aluminum alloy sheet manufacturing method of the present invention uses scrap aluminum alloy material as part of the casting raw material to obtain the aluminum alloy sheet of the present invention.
  • An aluminum alloy having the alloy composition shown in Table 1 was cast by DC casting, with the target temperature being the homogenization temperature shown in Table 2.
  • the holding time was the time from reaching the target temperature minus 5°C until the end of heating.
  • the alloy was hot rolled, cold rolled, and appropriately intermediate annealed, followed by solution treatment and pre-aging to obtain an aluminum alloy plate with a thickness of 1 mm.
  • the resulting alloy plate was used to measure the proportion of the ⁇ -AlFeMnSi phase in the second-phase particles and the degree of Cube orientation accumulation.
  • the yield strength in the 0, 45, and 90° directions was increased by aging to the values shown in Table 3, and bendability was evaluated.
  • the value of (A/(A+B)) ⁇ 100 was calculated.
  • test pieces in which the angle between the longitudinal direction and the rolling direction is 45° and test pieces in which the longitudinal direction is perpendicular to the rolling direction are taken from the test material, and tensile tests are carried out in the same manner as above using a method in accordance with JIS Z2241 to calculate the tensile strength, 0.2% proof stress, and elongation in the direction inclined at 45° to the rolling direction (45° direction) and in the direction perpendicular to the rolling direction (90° direction).
  • the Cube orientation density was measured using an X-ray diffractometer (RINT-2000 manufactured by Rigaku Corporation) with an inclination angle ranging from 15 to 90° by the Schulz reflection method, which is one of the X-ray diffraction measurement methods, to obtain texture orientation information by measuring incomplete pole figures of the (111), (220), and (200) planes. Then, from the obtained texture orientation information, the Cube orientation density was calculated using pole figure analysis software. The density was expressed as the ratio of the Cube orientation density to the density of a sample with random orientation, and was referred to as the random ratio.
  • the measurement surface was the ND-TD surface.
  • ⁇ Hemming test> After 10% tensile pre-strain, a 180° bending test was performed with an inner bending radius of 0.5 mm, and then a hemming test was performed on the middle plate with a plate thickness of 0.9 mm. After the test, the outer peripheral surface of the bent portion was graded according to the criteria of JIS H7701. A grade of 2 or less was considered pass, and a grade of 3 or more was considered fail.
  • the average chemical composition of the 6000 series aluminum alloy scrap is usually about the following: Si content of 0.20 to 0.60 mass%, Mg content of 0.45 to 0.90 mass%, Fe content of 0.35 mass% or less, Cu content of 0.10 mass% or less, Mn content of 0.10 mass% or less, Ti content of 0.10 mass% or less, Zn content of 0.10 mass% or less, and Cr content of 0.10 mass% or less. Then, from the chemical compositions of the aluminum alloy plates of Test Nos.
  • scrap 6000 series aluminum alloy materials can be used in a maximum of 99 mass% in the casting raw material, and that aluminum alloy plates excellent in bendability, preferably aluminum alloy plates excellent in strength, toughness and bendability, can be produced using the scrap 6000 series aluminum alloy materials.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un matériau en feuille d'alliage d'aluminium qui peut être fabriqué à l'aide de rebuts d'un alliage d'aluminium et qui est pliable. La présente invention concerne un matériau en feuille d'alliage d'aluminium comprenant un alliage d'aluminium constitué de 0,50 à 1,50 % en masse de Si, 0,35 à 0,80 % en masse de Mg, 0,08 à 0,60 % en masse de Fe, 0,001 à 0,40 % en masse de Cu, 0,01 à 0,25 % en masse de Mn et 0,00 % en masse à 0,09 % en masse de Ti, le reste étant Al et des impuretés inévitables. Le rapport d'une valeur intégrale d'intensité (A) d'un pic de diffraction ayant un sommet de pic au voisinage de 2θ = 42° au total de la valeur intégrale d'intensité (A) du pic de diffraction ayant un sommet de pic au voisinage de 2θ = 42° et d'une valeur intégrale d'intensité (B) d'un pic de diffraction ayant un sommet de pic au voisinage de 2θ = 17° est supérieur ou égal à 10,0 %, et le degré d'accumulation d'orientation cubique dans l'épaisseur de feuille totale d'un plan ND-TD est supérieur ou égal à 10.
PCT/JP2025/004476 2024-03-28 2025-02-12 Matériau en feuille d'alliage d'aluminium Pending WO2025204214A1 (fr)

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JP2024-053566 2024-03-28
JP2024053566A JP2025151929A (ja) 2024-03-28 2024-03-28 アルミニウム合金板材

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