WO2023013238A1 - Plaque d'alliage d'aluminium pour moulage et son procédé de fabrication - Google Patents

Plaque d'alliage d'aluminium pour moulage et son procédé de fabrication Download PDF

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WO2023013238A1
WO2023013238A1 PCT/JP2022/022965 JP2022022965W WO2023013238A1 WO 2023013238 A1 WO2023013238 A1 WO 2023013238A1 JP 2022022965 W JP2022022965 W JP 2022022965W WO 2023013238 A1 WO2023013238 A1 WO 2023013238A1
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aluminum alloy
plate thickness
hardness
plate
molding
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PCT/JP2022/022965
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English (en)
Japanese (ja)
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沙友理 竹村
渉 成田
誠 米光
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株式会社Uacj
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Priority to CN202280053898.1A priority Critical patent/CN117813410A/zh
Publication of WO2023013238A1 publication Critical patent/WO2023013238A1/fr

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    • 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
    • C22F1/047—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 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
    • 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 a molding aluminum alloy sheet with a reduced amount of springback after press molding of the sheet material, and a method for manufacturing the same.
  • Patent Document 1 discloses a layer harder than the average hardness from the surface layer to 1/4 plate thickness by incorporating a skin pass after solution treatment. A method for enhancing the shape fixability by providing is disclosed.
  • Patent Document 1 there is a problem that there are many areas that are harder than the average hardness. As mentioned above, since springback is a plastic deformation related to elastic deformation regions, it is better to minimize regions that are harder than the average hardness.
  • an object of the present invention is to provide an aluminum alloy plate that can improve the effect of reducing the amount of springback due to the decisive push.
  • the present inventors have made extensive studies and found that the springback amount is reduced while maintaining high strength by having a specific hardness distribution gradient and plate thickness in the thickness direction.
  • the present inventors have found that it is possible to obtain an aluminum alloy plate having excellent shape fixability, and have completed the present invention.
  • the hardness (Hv) is measured at intervals of 1/16 of the plate thickness in the plate thickness direction from the position of 1/2 depth of the plate thickness to the plate surface, and the vertical axis is Hardness (Hv), plotting the hardness distribution with the horizontal axis as the distance (mm) from the position of 1/2 depth of the plate thickness, from the plot of the hardness distribution, hardness (Hv) and the distance (mm) from the position of 1/2 of the plate thickness is approximated by a linear function, and when the slope A of the linear function is obtained by the least squares method, the slope A and the plate thickness (mm) Provided is an aluminum alloy sheet for molding, characterized in that the value obtained by multiplying by is 10 to 28.
  • the hardness (Hv) and the thickness From the plot of the hardness distribution, the hardness (Hv) and the thickness
  • the slope B1 of the linear function is obtained by the method of least squares, and among the plots of the hardness distribution, the plate thickness
  • the hardness (Hv) and the distance from the 1/2 thickness position (mm ) is approximated by a linear function
  • the slope B2 of the linear function is obtained by the method of least squares, the absolute value of the difference (B1-B2) between the slope B1 and the slope B2 is 10 or less.
  • the object is to provide an aluminum alloy sheet for molding according to (1).
  • the present invention (3) provides the aluminum alloy sheet for molding of (1) or (2), characterized by having a tensile strength of 140.0 MPa or more.
  • the present invention (4) provides an aluminum alloy sheet for forming according to any one of (1) to (3), which is made of a JIS 5000 series aluminum alloy.
  • the present invention (5) provides an aluminum alloy sheet for forming according to any one of (1) to (3), which is made of a JIS6000 series aluminum alloy.
  • the present invention (6) is a method for producing an aluminum alloy sheet for molding made of a JIS 5000 series aluminum alloy, comprising: (1a) a cold working rate of 70.0% or more; Performing a skin pass with a rolling reduction of 1.0 to 10.0%, (3a) performing three or more passes with a rolling reduction of 25.0% or less per pass of cold working, and (4a) stable
  • a method for producing an aluminum alloy sheet for molding characterized by performing at least one of treatment with a leveler after heat treatment.
  • the present invention (7) is a method for producing an aluminum alloy sheet for molding made of a JIS 6000 series aluminum alloy, in which (1b) the cold working rate is 70.0% or more, and (2b) after artificial aging treatment, (3b) Performing three or more passes with a rolling reduction of 25.0% or less per pass of cold working, and (4b) Solution Provided is a method for producing an aluminum alloy sheet for molding, characterized by performing at least one of treatment with a leveler after heat treatment or after artificial aging treatment.
  • an aluminum alloy plate that can improve the effect of reducing the amount of springback caused by a determined push.
  • FIG. 1 is a schematic cross-sectional view of an aluminum alloy sheet for forming according to the present invention
  • FIG. FIG. 4 is a hardness plot of Example A
  • FIG. 4 is a hardness plot of Example B
  • FIG. 4 is a hardness plot of Example C
  • FIG. 4 is a hardness plot of Example D
  • FIG. 4 is a hardness plot of Example E
  • FIG. 4 is a hardness plot of Example F
  • FIG. 4 is a hardness plot of Example G
  • FIG. 10 is a plot of the hardness of Comparative Example H
  • FIG. 4 is a plot of the hardness of Comparative Example I
  • FIG. 4 is a plot of hardness of 6000 series standard materials.
  • FIG. 4 is a hardness plot of Example J
  • FIG. 4 is a hardness plot of Example K
  • FIG. 4 is a hardness plot of Example L
  • It is a plot figure of the hardness of 5000 series standard material.
  • the aluminum alloy plate for molding of the present invention is measured for hardness (Hv) at intervals of 1/16 of the plate thickness in the plate thickness direction from the position of 1/2 depth of the plate thickness to the plate surface, and the vertical axis
  • the hardness (Hv ) and the distance (mm) from the position of half the thickness of the plate is approximated by a linear function, and when the slope A of the linear function is obtained by the least squares method, the slope A and the plate thickness (mm ) is 10 to 28.
  • FIG. 1 is a schematic cross-sectional view of an aluminum alloy sheet for molding according to the present invention.
  • FIG. 3 is a diagram plotting hardness distribution for Example B, with the vertical axis representing hardness (Hv) and the horizontal axis representing distance (mm) from a position half the plate thickness.
  • FIG. 9 is a diagram plotting the hardness distribution of Comparative Example H, with the vertical axis representing the hardness (Hv) and the horizontal axis representing the distance (mm) from the position half the plate thickness. .
  • FIG. 1 is a cross-sectional view of an aluminum alloy plate 1 for forming, taken along a plane perpendicular to the plate surface.
  • the position indicated by reference numeral 3 is the position at the depth of 1/2 of the plate thickness. That is, position 3 at a depth of 1/2 of the plate thickness is a position that is separated from the plate surface 7 in the plate thickness direction 6 by a length q of 1/2 of the plate thickness p.
  • the position indicated by reference numeral 5 is the position at the depth of 1/4 of the plate thickness. That is, the position 5 at a depth of 1/4 of the plate thickness is a position away from the plate surface 7 in the plate thickness direction 6 by a length r of 1/4 of the plate thickness p.
  • Inclination A is obtained by measuring the hardness (Hv) at intervals of 1/16 of the plate thickness in the plate thickness direction from the position of the depth of 1/2 of the plate thickness to the plate surface, and the vertical axis is the hardness (Hv) And when plotting the hardness distribution with the horizontal axis as the distance (mm) from the position of 1/2 the plate thickness, it is obtained by the least squares method based on the plot of the hardness distribution It is the slope of a linear function obtained by approximating the relationship between the hardness (Hv) and the distance (mm) from a position half the thickness of the plate with a linear function.
  • hardness (Hv) is measured at intervals of 1/16 of the plate thickness p in the plate thickness direction 6 from the position 3 at the depth of 1/2 of the plate thickness to the plate surface position 4. to measure.
  • the hardness (Hv) results at each measurement position are plotted with the vertical axis representing the hardness (Hv) and the horizontal axis representing the distance from the position half the plate thickness (mm ) and plotted as
  • the relationship between the hardness (Hv) and the distance (mm) from the position of half the thickness of the plate is approximated by a linear function, and the slope A of the linear function is obtained by the method of least squares.
  • the slope A is determined to be 16 by the method of least squares.
  • Comparative Example H the slope A is obtained as 4.9 by the method of least squares as shown in FIG. 9 by the same procedure.
  • the hardness (Hv) is measured by a method conforming to JIS Z 2244.
  • an aluminum alloy plate is embedded in resin, polished to a mirror surface, and then rolled at right angles (surface perpendicular to the plate surface).
  • ) was measured using a micro Vickers hardness tester (FM-110, manufactured by Futuretech) under the measurement conditions of a test load of 10 gf (0.098 N) and a holding time of 10 seconds.
  • the plot of the hardness distribution from the position 3 at a depth of 1/2 of the plate thickness to the position 5 at a depth of 1/4 of the plate thickness From this, the hardness (Hv) between position 3 at 1/2 depth of the plate and position 5 at 1/4 depth of plate thickness and the distance from the position at 1/2 depth of plate thickness (mm ) is approximated by a linear function, and the slope B2 of the linear function is obtained by the method of least squares.
  • the hardness distribution from the position of 1/2 depth of the plate thickness obtained as described above to the plate surface position is plotted, 1/2 depth of plate thickness
  • the linear value obtained by multiplying the value of the slope A of the function by the plate thickness (mm) (slope A x plate thickness (mm)) is 10 to 28, preferably 10 to 20, and particularly preferably 12 to 17.
  • the value of inclination A ⁇ plate thickness (mm) is within the above range, the amount of reduction in the amount of springback due to the final push is increased, and the shape fixability is excellent.
  • the correlation coefficient (R 2 ) with the plot of the hardness distribution from the half depth position to the plate surface position is 0.50 or more, preferably 0.70 or more, and particularly preferably 0.80 or more is.
  • the depth of 1/4 of the plate thickness is based on the plot of the hardness distribution from the position of 1/2 depth of the plate thickness to the plate surface position obtained as described above. From the plot of the hardness distribution from the position to the plate surface, the "hardness (Hv) obtained by the least squares method and 1/ 2 The slope B1 of the linear function, which approximates the relationship of the distance (mm) from the depth position by a linear function, and the position of 1/4 of the plate thickness from the position of 1/2 of the plate thickness From the plot of the hardness distribution up to, the "hardness (Hv) obtained by the least squares method and the thickness
  • the absolute value of the difference (B1-B2) from the slope B2 of the linear function which approximates the relationship of the distance (mm) from the position of 1/2 depth of the linear function, is preferably 10 or less, particularly preferably is 8 or less.
  • the value of the difference between the slope B1 and the slope B2 based on the plot of the hardness distribution from the half depth position of the plate thickness of the aluminum alloy plate for forming to the plate surface position is determined by being in the above range. It is possible to improve the effect of reducing the amount of springback caused by pushing.
  • the hardness is measured at intervals of 1/16 of the plate thickness in the plate thickness direction.
  • hardness is measured at intervals of 1/16th of the thickness. This is because an approximate linear function can be drawn, and the reliability of the slope value of the linear function increases.
  • the hardness is measured at intervals of 1/10 of the plate thickness in the plate thickness direction, it is difficult to measure the hardness near the outermost surface. , and the value of the slope of the linear function becomes less reliable.
  • the plate thickness of the aluminum alloy plate for molding of the present invention is 0.4 to 5.0 mm, preferably 0.8 to 2.7 mm.
  • the value of "tilt A x plate thickness (mm)" is 10 to 28, preferably 10 to 20, particularly preferably 12 to 17. It is difficult to make a distribution of
  • the basic components of the aluminum alloy sheet for molding of the present invention are not particularly limited. various aluminum alloys such as the 7000 series.
  • the aluminum alloy sheet for molding of the present invention is preferably made of a JIS5000 series aluminum alloy or a JIS6000 series aluminum alloy.
  • the composition of the JIS5000 series aluminum alloy is Si: 0.25% by mass or less, Fe: 0.40% by mass or less, Cu: 0.10% by mass or less, Mn: 0.10% by mass or less, Mg: 2.20. 2.80% by mass, Cr: 0.15 to 0.35% by mass, Zn: 0.10% by mass or less, and the balance being aluminum and unavoidable impurities.
  • the chemical composition of the JIS6000 series aluminum alloy is Si: 0.20 to 0.60% by mass, Fe: 0.35% by mass or less, Cu: 0.10% by mass or less, Mn: 0.10% by mass or less, Mg: 0.45 to 0.90% by mass, Cr: 0.10% by mass or less, Zn: 0.10% by mass or less, Ti: 0.10% by mass or less, and the balance being made of an alloy containing aluminum and unavoidable impurities is more preferred.
  • the tensile strength of the aluminum alloy plate for molding of the present invention is preferably 140.0 MPa or more, more preferably 150.0 to 300.0 MPa, and particularly preferably 160.0 to 290.0 MPa.
  • the aluminum alloy plate for molding of the present invention has a value of "tilt A x plate thickness (mm)" of 10 to 28, preferably 10 to 20, particularly preferably 12 to 17, and more preferably "
  • the absolute value of "slope B1 - slope B2" is preferably 10 or less, particularly preferably 8 or less, so that the tensile strength is preferably 140.0 MPa or more, more preferably 150.0 to 300.0 MPa, particularly preferably Although it has a high strength of 160.0 to 290.0 MPa, the amount of reduction in the amount of springback due to the final push is large, and the shape freezeability is excellent.
  • Example B which is a plot of the hardness distribution shown in FIG. After setting the plate thickness to 0.81 mm, solution treatment and artificial aging treatment were performed, and after artificial aging, 3.0% skin pass was performed.
  • the hardness is the lowest at the central portion of the plate thickness (the position at the depth of 1/2 of the plate thickness), and the hardness is linearly increased to the plate surface. is changing.
  • the slope A obtained by the method of least squares is 16 based on the hardness distribution plotted in FIG. Therefore, the value of "tilt A x plate thickness (mm)" is 13 (16 x 0.81).
  • the aluminum alloy plate of Example B was subjected to a 90-degree bending test at 20 kgf (196) N, 100 kgf (980) N, and 200 kgf (1961 N). 7° and 3.7°.
  • the amount of springback is determined by the difference from 90°, and in the aluminum alloy plate of Example B, the phenomenon that the amount of springback is reduced under the condition of a large load in the 90° bending test, that is, the condition corresponding to the so-called final push. confirmed.
  • Comparative Example H which is a plot of the hardness distribution shown in FIG. After setting the plate thickness to 0.82 mm, 3.0% skin pass was performed, followed by solution treatment and then artificial aging treatment.
  • the slope A obtained by the method of least squares is 4.9. Therefore, the value of "tilt A x plate thickness (mm)" is 4.0 (4.9 x 0.82).
  • the springback amounts were 8.7°, 10.3° and 8.0°, respectively.
  • the amount of springback did not change even under the condition of a large load in the 90° bending test, that is, the condition corresponding to the so-called final push.
  • the aluminum alloy plate for molding of the present invention has a value of "tilt A x plate thickness (mm)" of 10 to 28, preferably 10 to 20, and particularly preferably 12 to 17, which corresponds to the decisive condition. It has excellent moldability in a high load 90° bending test. In general, a hard material is strongly influenced by springback, so it is difficult to realize a material having high strength and excellent formability.
  • the aluminum alloy sheet for molding of the present invention is suitably produced by the method for producing an aluminum alloy plate for molding according to the first aspect of the present invention or the method for producing an aluminum alloy plate for molding according to the second aspect of the present invention described below. manufactured.
  • a method for producing an aluminum alloy sheet for molding according to the first embodiment of the present invention is a method for producing an aluminum alloy sheet for molding made of a JIS 5000 series aluminum alloy, and includes (1a) a cold work rate of 70.0% or more; (2a) Performing a skin pass with a rolling reduction of 1.0 to 10.0% after the stabilization treatment, (3a) Three passes with a rolling reduction of 20.0% or less per pass of cold working.
  • a method for producing an aluminum alloy sheet for molding characterized by performing at least one of the above and (4a) treating with a leveler after the stabilization treatment.
  • the casting method, the homogenization treatment method, and the stabilization treatment method are not particularly limited, and can be appropriately selected.
  • (1a) the cold working ratio is set to 70.0% or more, and (2a) the reduction ratio after the stabilization treatment is 1.0 to 1.0%. 10.0% skin pass, (3a) performing 3 or more passes with a rolling reduction of 20.0% or less per pass of cold working, and (4a) treatment with a leveler after stabilization treatment.
  • the value of the slope A can be easily increased by combining two or more of the above (1a) to (4a).
  • (1a) is to set the cold working rate to 70.0% or more, preferably 70.0 to 80.0%.
  • (2a) is to perform skin pass with a rolling reduction of 1.0 to 10.0%, preferably 3.0 to 10.0% after the stabilization treatment.
  • the skin pass defined in (2a) is performed so that the cold working rate in cold working (total cold working rate in cold working) is 30.0 or more. It is preferably carried out when it is less than 70.0%, particularly when it is 30.0 to 60.0%.
  • (3a) is to perform three or more passes with a rolling reduction of 25.0% or less per pass of cold working.
  • the cold working path defined in (3a) is set so that the cold working rate in cold working (total cold working rate in cold working) is When it is 30.0 or more and less than 70.0%, it is preferable to carry out when it is particularly 30.0 to 60.0%.
  • (4a) is to treat with a leveler after stabilization treatment.
  • a leveler is a device commonly used for the purpose of straightening the warp of a thin plate, and processing with a leveler is at least two stages provided so that the points of action of the rolls are slightly different from each other with respect to the traveling direction of the plate.
  • the treatment with a leveler specified in (4a) is performed so that the cold working rate in cold working (total cold working rate in cold working) is 30. When it is 0 or more and less than 70.0%, it is preferable to carry out when it is particularly 30.0 to 60.0%.
  • a method for producing an aluminum alloy sheet for molding according to a second embodiment of the present invention is a method for producing an aluminum alloy sheet for molding made of a JIS 6000 series aluminum alloy, and (1b) the cold working ratio is set to 70.0% or more.
  • the casting method, homogenization treatment method, solution treatment method, and artificial aging treatment method are not particularly limited and may be appropriately selected.
  • (1b) the cold working ratio is set to 70.0% or more, and (2b) the reduction ratio after the artificial aging treatment is 1.0 to 1.0%. 10.0% skin pass, (3b) three or more cold working passes with a rolling reduction of 20.0% or less per pass, and (4b) treatment with a leveler after artificial aging treatment.
  • the above (1b) to (4b) may be implemented, or two or more of the above (1b) to (4b) may be implemented in combination.
  • the value of the slope A can be easily increased by combining two or more of the above (1b) to (4b).
  • (1b) is to set the cold working rate to 70.0% or more, preferably 70.0 to 80.0%.
  • (2b) is to perform skin pass with a rolling reduction of 1.0 to 10.0%, preferably 3.0 to 10.0%, after the artificial aging treatment.
  • the skin pass defined in (2b) is performed so that the cold working rate in cold working (total cold working rate in cold working) is 30.0 or more. It is preferably carried out when it is less than 70.0%, particularly when it is 30.0 to 60.0%.
  • (3b) is to perform three or more passes with a rolling reduction rate of 25.0% or less per pass of cold working.
  • the cold working path defined in (3b) is set so that the cold working rate in cold working (total cold working rate in cold working) is When it is 30.0 or more and less than 70.0%, it is preferable to carry out when it is particularly 30.0 to 60.0%.
  • (4a) is to treat with a leveler after solution treatment or after artificial aging treatment.
  • a leveler is a device commonly used for the purpose of straightening the warp of a thin plate, and processing with a leveler is at least two stages provided so that the points of action of the rolls are slightly different from each other with respect to the traveling direction of the plate.
  • the treatment with a leveler specified in (4b) is performed so that the cold working rate in cold working (total cold working rate in cold working) is 30. When it is 0 or more and less than 70.0%, it is preferable to carry out when it is particularly 30.0 to 60.0%.
  • the hardness as described above in the aluminum alloy plate for forming according to the present invention is as follows. It is considered that the hardness distribution in the aluminum alloy sheet for molding of the present invention originates from work hardening. In metals, dislocations increase due to working stress, and internal stress accumulates. Work hardening is said to occur when the number of dislocations increases too much, causing the dislocations to become entangled or cut, resulting in hardening of the material itself.
  • the effect of reducing the amount of springback in the aluminum alloy plate for molding of the present invention is derived from the hardness distribution in the plate thickness direction derived from work hardening, so not only work hardening alloys such as JIS 5000 series but also JIS 6000 series A similar tendency is obtained in such a heat treatable alloy.
  • work hardening alloys such as JIS 5000 series but also JIS 6000 series
  • a large number of precipitates are formed before and after artificial aging, which affects the hardness of the alloy.
  • the hardness distribution in the sheet thickness direction of the aluminum alloy sheet for molding of the present invention is derived from work hardening due to cold rolling, skin pass, etc., it is believed that there is no effect on the inclination of the hardness distribution itself before and after aging. think. This is also evident in Examples AG.
  • Springback is mainly due to elastic deformation when bending the material. Since the elastic deformation region becomes narrower as the strength of the material decreases, the amount of springback decreases as the strength of the material decreases.
  • a soft layer exists in the central portion of the plate thickness, and the elastic deformation region of that portion is narrow, so that the effect of reducing the amount of springback can be improved as a result. In other words, the wider the soft layer exists in the sheet thickness direction, the more the layer is plastically deformed.
  • Example 1 JIS A6063 aluminum alloy and JIS 5052 aluminum alloy were cast by DC casting. Next, for JIS A6063 aluminum alloy, homogenization treatment, hot rolling, cold rolling, solution treatment, and artificial aging treatment are performed in order, and for JIS 5052 aluminum alloy aluminum alloy, homogenization treatment and hot rolling are performed. , cold rolling, and stabilization treatment are performed in order, and in these processes, the manufacturing conditions shown in Table 1 or Table 2 are performed, and in the JIS A6063 aluminum alloy, the plate shown in Table 1 is produced with a target of 0.80 mm. With a target thickness of 2.70 mm for JIS 5052 aluminum alloy, aluminum alloy plates having thicknesses shown in Table 2 were produced.
  • Example A The rate of cold working was increased.
  • Example B After the artificial aging treatment, skin pass was performed with a rolling reduction of 3.0%.
  • Example C The number of cold working passes was increased.
  • Example D The number of cold working passes was increased, and a skin pass was performed with a rolling reduction of 3.0% after the artificial aging treatment.
  • Example E After the artificial aging treatment, a skin pass was performed with a rolling reduction of 5.0%.
  • Example F After the artificial aging treatment, a skin pass was performed with a rolling reduction of 10.0%.
  • Example G Treatment with a leveler was performed after solution treatment.
  • Comparative Example H After cold rolling and before solution heat treatment, skin pass was performed with a rolling reduction of 3.0%. Comparative Example I: The number of cold working passes was reduced. Example J: Increased cold rolling rate. Example K: The number of cold working passes was increased. Example L: Skin pass was performed with a rolling reduction of 3.0% after the stabilization treatment.
  • Hv Hardness (Hv) measurement> The hardness (Hv) was measured according to JIS Z 2244. An aluminum alloy plate is embedded in resin, mirror-polished, and then a rolled right-angled cross section (surface perpendicular to the plate surface) is subjected to a test load of 10 gf using a micro Vickers hardness tester (FM-110, manufactured by Futuretech Co., Ltd.). (0.098 N) and the hardness (Hv) was measured under the measurement conditions of 10 seconds of holding time. The measurement was performed at predetermined intervals in the thickness direction, three points were measured for each measurement position, and the average value was defined as the hardness (Hv) at that position.
  • FM-110 micro Vickers hardness tester
  • the thickness direction of the JIS6000 series aluminum alloy plate was measured at intervals of 0.05 mm, and the thickness direction of the JIS5000 series aluminum alloy plate was measured at intervals of 0.168 mm. At the position of the outermost layer, the hardness was not measured because the impression of Vickers hardness also reached the resin. The results are shown in Tables 3 and 4. Further, each hardness distribution is shown in FIGS. 2 to 15. FIG. Table 5 shows the slope A obtained by the method of least squares.
  • Table 5 shows each evaluation result. If the reduction in the amount of springback at 200 kgf compared to 20 kgf was 1° or more, it was evaluated as “good” because it was excellent in formability. It was set as “evaluation: bad” because it is inferior.
  • the aluminum alloy plate of the present invention has a small amount of springback after forming, and good formability can be obtained.

Abstract

L'invention concerne une plaque d'alliage d'aluminium pour moulage caractérisée en ce que lorsque l'on mesure la dureté (Hv) à des intervalles de 1/16 d'une épaisseur de plaque dans le sens épaisseur de plaque, depuis la position de profondeur correspondant à la moitié de l'épaisseur de la plaque jusqu'à la surface de plaque, que l'on trace une distribution de dureté dans laquelle l'axe vertical représente la dureté (Hv) et l'axe horizontal la distance (mm) à partir de la position de profondeur correspondant à la moitié de l'épaisseur de la plaque, que l'on approxime la relation entre la dureté (Hv) et la distance (mm) à partir de la position de profondeur correspondant à la moitié de l'épaisseur de plaque par une fonction linéaire sur la base du tracé de la distribution de dureté, et que l'on obtient la pente A de la fonction linéaire par la méthode des moindres carrés, la valeur obtenue en multipliant la pente A par l'épaisseur de plaque (mm) va de 10 à 28. La présente invention permet d'obtenir une plaque d'alliage d'aluminium qui est capable d'améliorer l'effet de réduction d'une quantité de retour élastique provoquée par une pression.
PCT/JP2022/022965 2021-08-02 2022-06-07 Plaque d'alliage d'aluminium pour moulage et son procédé de fabrication WO2023013238A1 (fr)

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JPH06192781A (ja) * 1992-05-12 1994-07-12 Sky Alum Co Ltd 耐型かじり性、耐きず性に優れたアルミニウム合金板
JP2003129201A (ja) * 2001-10-18 2003-05-08 Furukawa Electric Co Ltd:The 曲げ加工性に優れるアルミニウム合金板の製造方法および前記製造方法により製造された曲げ加工性に優れるアルミニウム合金板
JP2003247040A (ja) * 2002-02-25 2003-09-05 Kobe Steel Ltd フラットヘム加工性に優れたアルミニウム合金板およびその製造方法
JP2007136464A (ja) * 2005-11-15 2007-06-07 Sumitomo Light Metal Ind Ltd 表面品質に優れたＡｌ−Ｍｇ−Ｓｉ系アルミニウム合金板の製造方法
JP2011132592A (ja) * 2009-12-25 2011-07-07 Sumitomo Light Metal Ind Ltd リングプル型キャップ用アルミニウム合金板及びその製造方法
JP2013194286A (ja) * 2012-03-21 2013-09-30 Nippon Light Metal Co Ltd プレス成形性と形状凍結性に優れたアルミニウム合金板およびその製造方法
CN104532077A (zh) * 2014-11-28 2015-04-22 苏州有色金属研究院有限公司 无漆刷线6xxx系铝合金车身板的短流程制备方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06192781A (ja) * 1992-05-12 1994-07-12 Sky Alum Co Ltd 耐型かじり性、耐きず性に優れたアルミニウム合金板
JP2003129201A (ja) * 2001-10-18 2003-05-08 Furukawa Electric Co Ltd:The 曲げ加工性に優れるアルミニウム合金板の製造方法および前記製造方法により製造された曲げ加工性に優れるアルミニウム合金板
JP2003247040A (ja) * 2002-02-25 2003-09-05 Kobe Steel Ltd フラットヘム加工性に優れたアルミニウム合金板およびその製造方法
JP2007136464A (ja) * 2005-11-15 2007-06-07 Sumitomo Light Metal Ind Ltd 表面品質に優れたＡｌ−Ｍｇ−Ｓｉ系アルミニウム合金板の製造方法
JP2011132592A (ja) * 2009-12-25 2011-07-07 Sumitomo Light Metal Ind Ltd リングプル型キャップ用アルミニウム合金板及びその製造方法
JP2013194286A (ja) * 2012-03-21 2013-09-30 Nippon Light Metal Co Ltd プレス成形性と形状凍結性に優れたアルミニウム合金板およびその製造方法
CN104532077A (zh) * 2014-11-28 2015-04-22 苏州有色金属研究院有限公司 无漆刷线6xxx系铝合金车身板的短流程制备方法

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