WO2007111002A1

WO2007111002A1 - High-formability aluminum material

Info

Publication number: WO2007111002A1
Application number: PCT/JP2006/323861
Authority: WO
Inventors: Hideo Morimoto
Original assignee: The Furukawa Electric Co., Ltd.
Priority date: 2006-03-29
Filing date: 2006-11-29
Publication date: 2007-10-04

Abstract

An aluminum material made up of crystal grains differing in crystal orientation, the crystal grains consisting of cube-orientation crystal grains, brass-orientation crystal grains, copper-orientation crystal grains, and crystal grains having other crystal orientation(s) as the remainder, the proportions of the cube-orientation crystal grains, brass-orientation crystal grains, and copper-orientation crystal grains being 0.3-0.7, 0.1-0.5, and 0.2 or lower, respectively, and the total proportion of these crystal orientations being 0.4-1.0, with the remainder being the crystal grains having other crystal orientation(s). Also provided is an automotive part comprising the aluminum material.

Description

Specification

High formability aluminum material

Technical field

TECHNICAL FIELD [0001] The present invention relates to an aluminum material, and in particular, to high hem bendability required at the time of assembling automobile body sheets, automobile parts, machine parts, and plate formability such as press forming at the time of body formation or housing formation. It relates to an excellent aluminum material.

Background art

[0002] Aluminium, such as body seats, is advancing in automobiles, and the outer material is excellent in beta-hardness (property that precipitates and hardens when heated during paint baking), and has high strength after paint baking. —Mg— Si-based) aluminum alloys are often used, and 5000 (A1-Mg) aluminum alloys with excellent drawability are used for the inner material.

This outer material with 6000 series aluminum alloy strength is a force 6000 series (A1 Mg-S engagement metal plate) that is required to have excellent bending cacheability called hem bending, which is usually caulked with the inner material. The hem bendability is inferior, and in particular, in the case of a material solution-treated at a high temperature in order to increase the beta hardness, there is a problem that this hem bendability is remarkably inferior.

[0003] Further, the outer material of this 6000 series aluminum alloy is required to have a good press formability, which is a kind of plate forming, with few restrictions for determining the design of an automobile. However, the press formability is generally inferior to that of conventional steel plates and 5000 series aluminum alloy plates, and improvements are desired in order to integrate the materials used in consideration of the problem of recycling automobile parts.

[0004] Under such circumstances, for improving the bending strength, a method of controlling the surface hardness of the aluminum alloy plate (for example, see Patent Document 1), a method of controlling the crystal grain size and the precipitate size ( For example, see Patent Documents 2 and 3), a method for controlling the crystal orientation of the aluminum alloy plate surface (see, for example, Patent Documents 4 and 5), a method for controlling the crystal orientation of the entire aluminum alloy plate (see, for example, Patent Document 6) ), Aluminum alloy surface force, a method of controlling the bending workability by controlling the crystal orientation up to a certain depth (for example, see Patent Document 7). It has been proposed.

[0005] To improve plate forming, a method for improving press formability by controlling the Lankford value in each of the 0 °, 45 °, and 90 ° directions with respect to the rolling direction of the aluminum alloy plate (for example, , And Patent Documents 8 and 9), and a method for improving press formability and bending workability by controlling the relationship between tensile strength and proof stress and the crystal grain size and precipitation free zone (PFZ) of the aluminum-alloy plate surface. (See, for example, Patent Document 10).

[0006] It is known that optimum design can be performed based on the results obtained from single crystal orientation materials of Cube orientation, Brass orientation and Copper orientation, which are the relationship force between crystal grain orientation and plate formability in plate forming. (For example, see Non-Patent Document 1). In addition, a difference in deformability of unidirectional grain materials in deep drawing, which is a type of plate forming, is known (for example, see Non-Patent Document 2).

[0007] However, in particular, for body sheets of automobiles, a plate represented by an intense bending process such as hem bending necessary for the assembly of the body and press formability required to precisely process the body shape. Force required for both formability at a high level Force that was only possible to improve hem bendability At the same time, it is difficult to raise the plate formability to the same level as the conventional steel body. Attempting to raise the sheet formability level lowers the hem bendability level, and press forming is achieved by controlling the relationship between tensile strength and proof stress, crystal grain size on the aluminum alloy sheet surface, and precipitation free zone (PFZ). Even with a method to improve the workability and bending workability, it was difficult to obtain a high formability of sheet formability.

[0008] Patent Document 1 Japanese Unexamined Patent Publication No. 2003-129201

Patent Document 2 Japanese Unexamined Patent Publication No. 2003-221637

Patent Document 3 Japanese Unexamined Patent Publication No. 2003-268472

Patent Document 4 Japanese Unexamined Patent Publication No. 2003-226926

Patent Document 5 Japanese Unexamined Patent Publication No. 2003-226927

Patent Document 6 Japanese Unexamined Patent Publication No. 2003-268475

Patent Document 7 Japanese Unexamined Patent Application Publication No. 2004-27253

Patent Document 8 JP 2002-146462

Patent Document 9 JP 2004-10982 A Patent Document 10: Japanese Patent Laid-Open No. 2003-105473

Non-Patent Document 1: Eiji Nakamachi, Yoshinori Hamada: Plasticity and Processing, 39-446 (1998), 252.

Non-Patent Document 2: Hideo Morimoto, Eiji Nakamachi: Furukawa Electric Times, 103 (1999), 7.

Disclosure of the invention

[0009] Under such circumstances, the present inventors have studied the influence of the crystal orientation distribution of crystal grains on hem bendability and plate formability. As a result, the present inventors can achieve both hem bendability and plate formability at a high level. Invented.

An object of the present invention is to provide an aluminum material that can achieve both a high degree of hem bendability and sheet formability.

Specifically, by controlling the ratio of the Cube direction, Brass direction, and Copper direction among the crystal orientations shown by the crystal grains that make up the aluminum material, it is possible to press the steep bendability such as hem bending. It is an object to provide an aluminum material excellent in both properties of plate formability such as forming.

[0010] Usually, the texture of a rolled sheet is expressed by the relationship between the rolling surface of the sheet and the rolling direction ((ABC) and DEF>) (A, B, C, D, E, and F represent integers). ₀ here, the crystal orientation distribution of the crystalline texture of the sheet, in which the distribution of the specific crystal orientation to each plate for a random orientation, expressed in the ratio of crystal orientation.

[0011] In the present invention, evaluation was made with respect to Cube orientation, Brass orientation, and Copper orientation. The Cube orientation is the (100) <001> orientation, the Brass orientation is the (011) <211> orientation, and the Copper orientation is the (112) <111> orientation. Since the actual orientation of the plate material deviates from the ideal orientations of the Cube orientation, Brass orientation, and Copper orientation, each crystal is based on the ideal orientation of each crystal of the Cube orientation, Brass orientation, and Copper orientation. It is assumed that crystal orientations up to 5 ° from the ideal orientation are also included in Cube orientation, Brass orientation, and Copper orientation, respectively.

[0012] According to the present invention, the following means are provided:

(1) An aluminum material composed of crystal grains having different crystal orientations, wherein the crystal grain is composed of 1S Cube orientation crystal grains, Brass orientation crystal grains, Copper orientation crystal grains, and the balance is the other crystal grains. The crystal grain occupancy is 0.3 force, 0.7, and brass orientation. Grain occupancy is 0.1 force 0.5, copper orientation occupancy is 0.2 or less, and total occupancy in these orientations is 0.4 to 1.0, the balance Is an aluminum material characterized by being grains of other crystal orientations,

[0013] (2) An aluminum material composed of crystal grains having different crystal orientations, wherein the crystal grains are composed of 1S Cube orientation crystal grains, Brass orientation crystal grains, Copper orientation crystal grains, and the remainder being the other crystal grains. , Cube orientation crystal grain occupancy is 0.4 force etc. 0.6, Brass orientation crystal grain occupancy is 0.2 to 0.4, Copper orientation crystal grain occupancy is 0.05 power 0.1, and the total occupancy of these orientations is 0.65 force and 0.9, and the remainder is crystal grains of other crystal orientations,

[0014] (3) An aluminum material composed of crystal grains having different crystal orientations, wherein the crystal grain force Brass orientation crystal grains, Copper orientation crystal grains, and the remainder are the other-order crystal grains, The crystal grain occupancy is 0.2 to 0.4, the crystal occupancy of the copper orientation is 0.05 force to 0.1, and the total occupancy of these orientations is 0.25 force to 0.5 An aluminum material characterized in that the balance is composed of crystal grains with other crystal orientations and has excellent plate formability

[0015] (4) The plate has a formability that does not cause cracks on the surface at an overhang height of 30 mm, and does not cause cracks on the bending surface in hem bendability. In the ratio

0.5. The aluminum material according to item (1) or (2), wherein the aluminum material has a hem bendability of 5 or less,

[5] (5) It has a plate formability that does not cause cracks on the surface at an overhang height of 50 mm, and does not cause cracks on the bending surface in hem bendability. In the ratio

0.2. The aluminum material according to (1) or (2) above, which has a hemming bendability of 25 or less,

[0017] (6) The above-mentioned Noreminicum material strength Mg is 0.25 force, etc. 1.0 mass%, Si is 0.5 force, etc. 1.3 mass s%, and is an aluminum alloy composed of the balance A1 and inevitable impurities. The aluminum material according to any one of the above (1) to (5),

[0018] (7) Noreminicum material force Mg: 0.25 force, etc. 1.0 mass%, Si: 0.5 force, etc. 1.3 mass s%, Cu, Zn, Mn: less than lmass%, Fe: 0.40 mass % Or less, Ti, Cr 0.lmass% The aluminum material as set forth in (1) to (5) above, wherein the aluminum material is an aluminum alloy comprising the balance A1 and unavoidable impurities,

[0019] (8) Noreminicum material strength Mg 0.40 force, etc. 1. Omass%, Si 0.5 force, etc. 1.3 mass s%, Cu, Mn lmass% or less, ZnO. 3 mass% or less, Fe Of (1) to (5) above, characterized in that it is an aluminum alloy that contains Ti and Cr in an amount of 0.220 mass% or less, Ti and Cr in an amount of less than 0.1 lmass%, and the balance Al and inevitable impurities. Aluminum material as described in

[0020] (9) The aluminum material strength Mg: 0.25 force, etc. 1. Omass%, Si: 0.5 force, etc. 1. 3mass%, Cu, Zn, Mn: less than lmass%, Fe: 0.40mass (1) to (1) above, characterized in that it is an aluminum alloy containing 0.1% or less of Ti, Cr or less, further containing 0.2% or less of V and Zr, and comprising the balance A1 and inevitable impurities. 5), the aluminum material according to paragraph 1,

[0021] (10) Noreminicum material strength Mg: 0.40 force, etc. 1. Omass%, Si: 0.5 force, etc. 1.3 mass%, Cu, Mn: lmass% or less, ZnO. 3mass% or less, Fe 0.2 mass% or less of Ti, Cr, 0.1 lmass% or less of V, and Zr of 0.1 lmass% or less, and an aluminum alloy comprising the balance A1 and inevitable impurities. (1) to (5), the aluminum material according to item 1;

[0022] (11) An automobile member using the aluminum material according to (4) or (5), and

(12) An automobile member using the aluminum material according to any one of (6) to (10).

[0023] The above and other features and advantages of the present invention will become more apparent with reference to the accompanying drawings as appropriate.

Brief Description of Drawings

[0024] [Fig. 1] Fig. 1 (a) to Fig. 1 (c) are diagrams schematically showing the hem bending workability test method performed in Example 1, and Fig. 1 (a) is a sample material. Fig. 1 (b) shows punch indentation, and Fig. 1 (c) shows tight bending (tightening) by vise.

BEST MODE FOR CARRYING OUT THE INVENTION

[0025] The present invention is described in detail below.

The present invention relates to the Cube orientation among the crystal orientations indicated by the crystal grains constituting the aluminum material. By controlling the ratio of the three directions, brass orientation and copper orientation, we found a material that satisfies both high-level bending such as hem bending and plate molding such as body press molding at a high level. For example, the occupancy ratio of Cube orientation crystal grains is 0.3 to 0.7, the occupancy ratio of Brass orientation crystal grains is 0.1 to 0.5, and the occupancy ratio of Copper orientation crystal grains is 0.2 or less. In addition, it exhibits good bendability and plate formability when compared with aluminum materials that satisfy a total occupancy ratio of Cube orientation, Brass orientation, and Copper orientation of 0.4 force 1.0. . The relationship between the occupancy of each crystal orientation of the crystal grains constituting the aluminum material and both characteristics is described below.

[0026] Firstly, it is known that the crystal orientation density of Cube orientation crystal grains has a large effect on the heme bending, and as the crystal orientation density becomes higher than the crystal orientation density of random orientation grain, It is known that hem bending is good. Also in the present invention, it is preferable to increase the occupancy ratio of the crystal grains having the Cube orientation in order to improve the hem bending. However, an increase in the Cube-oriented crystal grain occupancy results in a significant loss of plate formability.

Accordingly, in the present invention, as a result of various studies, the range of the occupation ratio is preferably 0.3 to 0.7, and more preferably 0.4 to 0.6. In the lower limit of this range, practically sufficient hem bendability can be provided, and in the upper limit, sufficient plate formability can be maintained to perform press molding of the body sheet to the car exterior.

[0028] Secondly, the plate formability is improved as opposed to the case where the occupancy ratio of the brass orientation crystal grains is high and the occupancy ratio of the Cube orientation crystal grains is high. However, the influence of brass-oriented grains on hem bendability was unknown, and the influence of the occupation rate was unknown.

Therefore, in the present invention, as a result of examining the influence of the occupancy ratio of the brass-oriented crystal grains on the hem bending and plate forming, the occupancy ratio range is 0.1 to 0.5, preferably 0.2 to 0.4. Within the Cube-oriented crystal grain occupancy range, by setting the brass-oriented crystal grain occupancy ratio to 0.1 to 0.5, both hem bending and plate forming can be obtained at a high level. . If the material is out of this range, either hem bending or plate forming will be superior, or both will be at a low level. [0030] Thirdly, the occupation ratio of copper-oriented crystal grains is 0.2 or less, preferably 0.05-0.15, and more preferably 0.05-0.1. The reason for this limitation is that the copper-oriented crystal grains are known to have the same function as the brass-oriented crystal grains for plate forming. Oriented grain force It has been found that the presence of the above-mentioned occupancy ratio has the effect of raising both the hem bendability and the plate forming level. It is expected that it will work as a cushioning material!

Next, a method for calculating the crystal orientation occupancy will be described.

Prepare an aluminum plate for measurement, in this case an aluminum plate with a predetermined thickness (for example, lmm), degrease the surface with an oil cleaning material such as acetone, and then apply an oxide layer suitable for the material of the aluminum plate. An aluminum plate from which the surface of the acid oxide layer has been removed using a remover (for example, aqua regia for an aluminum alloy) is mirror-finished by electrolytic polishing, and the vicinity of the surface layer of the aluminum plate is used as a test material to change the crystal orientation. Used for measurement.

Next, using this specimen, the crystal orientation of the crystal grains is measured by an electron backscatter diffraction pattern (hereinafter abbreviated as EBSP). The measurement is performed in a thermionic emission scanning electron microscope, each crystal orientation of the crystal grains in the unit area is measured, and when the number of all crystal grains in the unit area is 1, the Cu be orientation with respect to that The ratio of the number of crystal grains in the brass orientation and the copper orientation was determined, and the value was taken as the occupation ratio. For example: 1. If the total number of grains in the Omm square is 100, the total number of grains in the Cube, Brass, and Copper orientations is 100 (that is, there are no grains in other crystal orientations). ), The total occupancy (total occupancy) of each crystal grain in Cube orientation, Brass orientation and Copper orientation is 1.

[0032] The aluminum material according to the present invention exhibits a good bendability and plate formability at the occupancy ratio of the crystal orientation because the crystal structure is a face-centered cubic structure. Materials with a face-centered cubic structure include A1 alloys, Cu alloys, Ni alloys, Ag alloys, and Au alloys, but the A1 alloys exhibit remarkable effects.

[0033] In the Al-Mg-Si alloy, the A1 alloy includes Mg of 0.25 force, 1. Omass%, Si of 0.5 force, 1.3 mass%, and the balance of A1 and inevitable impurities. Show a big effect Is preferable.

Si and Mg contained as essential elements in this Al-Mg-Si alloy are Mg Si composites.

2

It precipitates and contributes to the improvement of strength. If the amount is too small, the effect is insufficient. If the amount of Si is too large, a natural aging phenomenon occurs, which may cause a significant decrease in bending workability. In addition, if the amount of Mg is too large, a large amount of coarse Mg Si compound precipitates, resulting in a solid solution.

2

The amount may be greatly reduced, causing a decrease in bending workability and beta-hardness. Further, for example, in order to slightly increase the strength of the plate material, the lower limit value of Mg is preferably set to 0.40% or more.

[0034] In addition to Mg and Si, Cu, Zn, Mn, Cr, Ti, or the like may be added. Addition of Cu enhances strength, ductility, degreasing, chemical conversion, etc. Additive of Zn improves degreasing and chemical conversion, and additive of Mn, Ti, Cr refines crystal grains. It shows the action of improving the bending strength, but when these elements are added excessively, the corrosion resistance and ductility are lowered.

As described above, the addition of Cu and Zn has no practical problem as long as any element is within the range of lmass% or less, but considering the balance between strength, ductility, degreasing, chemical conversion treatment, corrosion resistance and ductility. The upper limit can be appropriately determined to a level below lmass%. In particular, to increase the corrosion resistance of the plate material, it is preferable to add Zn to 0.3 mass% or less.

Also, the amount of added Mn, Cr, and Ti that promotes refinement of crystal grains and improves bending strength must be less than lmass% for Mn, and less than 0.1 lmass% for Ti and Cr. It is preferable to make it.

[0035] In addition to the above elements, Fe contained as an impurity forms a crystallized product that is harder than the Mg Si compound.

2

Therefore, the amount of Fe is preferably set to 0.40 mass% or less, and more preferably 0.20 mass% or less, because a large strain is formed in the periphery to promote the propagation of cracks. Furthermore, V, Zr, etc. can be included in the range of 0.20 mass% or less as necessary for the purpose of grain refinement. If the amount of V and Zr added is in the range of 0.20 mass% or less, there will be no effect on the plate formability such as hem bendability and press formability, but in consideration of corrosion resistance and ductility, it will be 0.1 lmass% or less. Preferably there is.

[0036] According to the present invention, the high hem bendability required at the time of assembling automobile body sheets, automobile parts, machine parts, etc., and plate formation such as press forming at the time of body formation or housing formation. An aluminum material excellent in formability can be provided.

[0037] Hereinafter, the present invention will be described in more detail based on examples. The present invention is not limited to these.

Example

[0038] (Example 1)

0.5 mass% for Mg, 0.9 mass% for Si, 0.06 mass% for Mn, 0.007 mass% for Fe, 0.1 mass% for Cu, and 0.05 mass% for Zn, Ti and Cr. In addition, the Al alloy consisting of the remaining Al is melted and cast in a 500 mm thick ingot by a conventional method, and this ingot is subjected to homogenization treatment at 540 ° C for 6 hours, after which the start temperature is 500 ° C and the end temperature is 200 ° C A hot rolled sheet having a thickness of 10 mm was obtained by hot rolling below. Next, this hot-rolled sheet was cold-rolled to a predetermined thickness such that a finished base sheet having a thickness of 1 mm was obtained at a finishing rate of 20%, 30%, 50%, 70%, and 90%. For the sample with a finish cold work rate of 90%, a finished blank having a thickness of 1 mm was obtained directly from a hot rolled sheet having a thickness of 10 mm.

Next, this cold-rolled sheet having a predetermined thickness was annealed at 325 ° C. for 2 hours and subjected to finish cold-rolling to produce a finished base sheet having a thickness of 1 mm. The finished base plate was subjected to a solution treatment at 500 ° C using a continuous annealing furnace and a stabilization treatment at 100 ° C for 24 hours to obtain a test material.

[0039] The crystal orientation occupancy was measured by the method described in the preceding paragraph and is shown in Table 1.

Specimen No. 1 listed in Table 1 was finish-rolled at a finish cold work rate of 20%. No. 2 is 30%, No. 3 is 50%, and No. 4 is 70. %, No. 5 is 80%, No.

Finish cold rolling was performed at a finish cold working rate of 10% for No. 10 and 90% for No. 11. Note that the occupancy of each crystal orientation includes crystal orientations 5 degrees apart from the ideal orientation of each crystal in the Cube orientation, Brass orientation, and Copper orientation.

[0040] A 180 ° C bending test and a stretch forming test were performed using the prepared test materials, and the hem bending workability and the plate formability were evaluated.

First, regarding the hem bendability, the pre-strain is applied in Fig. 1 (a), the punch is pushed in up to a bending angle of 170 degrees in Fig. 1 (b), and the vise tightening shown in Fig. 1 (c) is performed in order. ° C Bending Karoe test, punch 1 tip curvature R was changed to 0.25, 0.5, 0.75, 1.0 mm. The test was repeated for each tip curvature with the number of tests of 5 sheets, and the minimum value of the tip curvature at which no rough skin and cracking occurred was recorded in the column of hem bending workability in Table 1. Therefore, in this test, rough skin and cracks do not occur! / If the tip curvature is small! /, The hem bending calorie is excellent.

[0041] Regarding the stretch formability, after cutting the specimen into 300mm squares and applying lubricant on both sides, the stretch test was repeated under the condition of a stretch height of 50mm using a ball head punch with a diameter of 100mm. The test was conducted with the number of sheets tested to evaluate the stretch formability.

Table 1 shows all specimens with no cracks as “◯”, specimens with only one crack as “△”, and specimens with two or more cracks as “X” in Table 1. .

[0042] The strength and elongation of the specimens prepared were excluding the specimens with a finish cold working rate of 90%, and the strength was 230-240MPa, 0.2% strength 30-140MPa, and the elongation was More than 30%. The specimen with a finish cold work rate of 90% had the same strength and 0.2% resistance as the other specimens, but the elongation was as low as 17%.

[0043] ¾ 1

As is clear from Table 1, in each of the test materials No. 1 to No. 5 in which the crystal orientations are within the scope of the present invention, both the hem bending cacheability and the plate formability are good. Specimen No. 10 with a low orientation occupancy ratio and a large brass occupancy ratio, specimens No. 10 are not superior in both properties. It can be seen that although it has excellent properties, it is inferior in the formability of the reverse plate. That is, it can be seen that an excellent material satisfying the item (8) can be obtained. A material consisting of 0.5 mass% Mg, 0.9 mass% Si, and the balance consisting of A1 and inevitable impurities was manufactured in the same process as in Example 1. An excellent material satisfying the item) was obtained. In addition, the same materials as in Example 1 were used, except that only the Fe content was changed to 0.25 mass%, and the Fe content was changed to 0.25 mass% and the Cu content was changed to 0.15 mass%. When similar prototype materials were produced in the process, both obtained excellent results satisfying the item (7). Furthermore, V and Zr were added to the material of Example 1 with 0.1 and 15 mass% added, and V and Zr were both added with 0.08 mass% in the same process as Example 1. When similar prototype materials were produced, both obtained excellent results satisfying the item (9) or (10).

Industrial applicability

[0044] Since the aluminum material of the present invention is excellent in hem bendability and plate formability, it can be suitably used for automobile body sheets, automobile parts, machine parts, and the like.

[0045] While this invention has been described in conjunction with its embodiments, we do not intend to limit our invention in any detail of the description unless otherwise specified. The spirit and scope of the invention as set forth in the appended claims I think that it should be interpreted widely without contradicting.

Claims

The scope of the claims

[1] An aluminum material composed of crystal grains having different crystal orientations, wherein the crystal grains consist of Cube-oriented crystal grains, Brass-oriented crystal grains, Copper-oriented crystal grains, and the balance of the other crystal grains. Occupancy rate of Cube orientation crystal grains is 0.3 force, 0.7, Brass orientation crystal grain occupation ratio is 0.1 force 0.5, Copper orientation crystal grain occupation ratio is less than 0.2, and An aluminum material characterized in that the total occupancy of these orientations is 0.4 to 1.0, and the balance is crystal grains of other crystal orientations.

[2] An aluminum material composed of crystal grains having different crystal orientations, wherein the crystal grains consist of Cube-oriented crystal grains, Brass-oriented crystal grains, Copper-oriented crystal grains, and the remaining part of the other crystal grains, The occupancy of the Cube-oriented crystal grains is 0.4 force, 0.6, the occupancy ratio of the brass-oriented crystal grains is 0.2 to 0.4, and the occupancy ratio of the copper-oriented crystal grains is 0.05 force. 1. An aluminum material characterized in that the total occupancy of these orientations is 0.65 to 0.9, and the balance is crystal grains of other crystal orientations.

[3] An aluminum material composed of crystal grains having different crystal orientations, wherein the crystal grains are composed of brass-oriented crystal grains, copper-oriented crystal grains, and the balance is the other-order crystal grains. The occupancy is 0.2 to 0.4, the crystal occupancy of the copper orientation is 0.05 to 0.1, and the total occupancy of these orientations is 0.25 force to 0.5, and the balance Is an aluminum material characterized by having excellent plate formability composed of crystal grains having other crystal orientations.

[4] It has a plate formability that does not cause cracks on the overhanging surface at an overhanging height of 30 mm, and there is no cracking on the bending surface in the hem bendability. The aluminum material according to claim 1 or 2, wherein the aluminum material has a hemmability of 0.5 or less.

[5] It has a plate formability that does not cause cracks on the extended surface at an extended height of 50 mm, and does not generate cracks on the bent surface in the hem bendability. The range is the ratio of the bending radius to the Z plate thickness. The aluminum material according to claim 1 or 2, which has a hem bendability of 0.25 or less.

[6] Noreminikum material strength Mg: 0.25 force, etc. 1.0 mass%, Si: 0.5 force, etc. 1.3 mass%

And an aluminum alloy comprising the balance A1 and inevitable impurities. Item 6. The aluminum material according to any one of Items 1 to 5.

[7] Noreminikum material strength Mg: 0.25 force, etc. 1. Omass%, Si: 0.5 force, etc. 1.3 mass%

It is characterized by being an aluminum alloy containing Cu, Zn, Mn in lmass% or less, Fe in 0.440 mass% or less, Ti and Cr in 0.111 & 55% or less, and the balance A1 and inevitable impurities. The aluminum material according to any one of claims 1 to 5.

[8] Noreminikum material strength Mg 0.40 force, etc. 1. Omass%, Si 0.5 force, etc. 1.3 mass%

Cu, Mn is less than lmass%, ZnO. Less than 3 mass%, Fe is less than 0.20 mass%, Ti and Cr are less than 0. lmass%, and the balance is Al and inevitable impurities and power. The aluminum material according to any one of claims 1 to 5, wherein the force is one.

[9] Noreminikum material strength Mg: 0.25 force, etc. 1. Omass%, Si: 0.5 force, etc. 1.3 mass%

Cu, Zn, Mn is contained in lmass% or less, Fe is contained in 0.40 mass% or less, Ti and Cr are contained in 0.111 & 55% or less, V and Zr are contained in 0.220 mass% or less, and the remainder is A1 and inevitable impurities. The aluminum material according to any one of claims 1 to 5, wherein the aluminum material is a strong aluminum alloy.

[10] The aluminum material is Mg 0.44 force 1. Omass%, Si 0.5 force 1.3 Cu, Mn lmass% or less, ZnO 3 mass% or less, Fe 0. 6. An aluminum alloy containing 20 mass% or less, containing Ti or Cr in an amount of 0.1 lmass% or less, further containing V or Zr in an amount of 0.1 lmass% or less, and remaining A1 and unavoidable impurities. The aluminum material according to any one of 1.

[11] An automobile member using the aluminum material according to claim 4 or 5.

[12] An automobile member using the aluminum material according to any one of claims 6 to 10.