JPH0542492B2 - - Google Patents
Info
- Publication number
- JPH0542492B2 JPH0542492B2 JP8644623A JP4462386A JPH0542492B2 JP H0542492 B2 JPH0542492 B2 JP H0542492B2 JP 8644623 A JP8644623 A JP 8644623A JP 4462386 A JP4462386 A JP 4462386A JP H0542492 B2 JPH0542492 B2 JP H0542492B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum alloy
- foil
- formability
- aluminum
- strength
- 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.)
- Expired - Lifetime
Links
- 239000011888 foil Substances 0.000 claims description 19
- 229910000838 Al alloy Inorganic materials 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 238000000137 annealing Methods 0.000 description 8
- 239000013078 crystal Substances 0.000 description 6
- 238000005097 cold rolling Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002537 cosmetic Substances 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- -1 1N30 alloy Chemical compound 0.000 description 1
- 101000993059 Homo sapiens Hereditary hemochromatosis protein Proteins 0.000 description 1
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Landscapes
- Metal Rolling (AREA)
- Laminated Bodies (AREA)
Description
産業上の利用分野
この発明は、例えば食品が化粧品の包装容器あ
るいは電子部品等に単体であるいはラミネート箔
として使用されるアルミニウム合金箔、特に成形
性に優れたアルミニウム合金箔に関する。
従来の技術及び問題点
上記のような用途に使用されるアルミニウム合
金箔としては従来、圧延性の良い例えば1N30合
金等の純アルミニウムや、あるいは8011合金を素
材とするものが一般的であつた。そしてこれらア
ルミニウム合金箔の上記包装器等への成形は、一
般に深絞り加工により行われていた。
ところが最近では、成形加工方式が深絞り加工
から生産性に優れた張出し加工へと移行してきて
おり、しかもコスト面からアルミニウム箔の薄肉
化が要請されるようになつてきている。しかるに
従来のアルミニウム合金箔では、延性に劣り張出
し加工に際して充分な張出し高さに成形すること
が困難であるのみならず、強度の点でも問題があ
り、薄肉化の要請にも充分対処することができな
かつた。
一方、結晶粒を微細化して延性、強度を向上す
るために、Fe含有量の多い8079合金を用いたり、
CAL（連続焼鈍炉）等を使用した急速焼鈍の実施
がなされているが、807合金で急速焼鈍を実施す
ると逆に結晶粒の粗大化現象を生じ、却つて延性
ひいては成形性を劣化させる場合があるというよ
うな問題があつた。
この発明はこのような背景のもとになされたも
のであつて、強度が高く、成形性の優れたアルミ
ニウム合金箔の提供を目的とするものである。
問題点を解決するための手段
而してこの発明は、Fe：0.7〜2.0wt％、Mn：
0.05〜0.2wt％を含み、残部がアルミニウム及び
不可避不純物からなることを特徴とする成形性に
優れたアルミニウム合金箔を要旨とするものであ
る。
上記アルミニウム合金箔の組成において、Fe
は再結晶粒の微細化に効果を有するものである
が、0.7wt％未満ではその効果に乏しく、逆に
2.0wt％を超えて含有されると粗大化合物の増大
を来たし延性を低下させる。Feの望ましい含有
量は1.0〜1.5wt％の範囲である。
MnはFeの固溶限を少なくし、結晶粒の微細化
を助長する効果があるとともに、急速焼鈍時の結
晶粒粗大化防止に有効である。また箔の強度の向
上にも寄与するものである。Mnが0.05wt％未満
ではこれらの効果に乏しく、逆に0.2wt％を超え
るとｎ値（加工硬化係数）が低下し、延性（一様
伸び）の低下を派生する。
なおアルミニウム合金中の不可避不純物は少な
い方が好ましいが、Siは0.2wt％程度まで、他の
元素は0.05wt％程度までそれ等の含有が許容され
る。
上記のアルミニウム合金箔の製造は、一般的に
は、アルミニウム合金鋳塊に熱間圧延、箔圧延を
含む冷間圧延、最終焼鈍の各必須工程を順次的に
実施することにより行うが、必要に応じて冷間圧
延の途中、すなわち１次冷間圧延と２次冷間圧延
との間で中間焼鈍を施したり、熱間圧延前に均質
化処理を施すことも行われる。
発明の効果
この発明による限定組成のアルミニウム合金箔
は、後述の実施例によつても明らかなように、結
晶粒が微細で強度、伸びが高く、成形性に更に一
層優れたものとなる。従つて該箔の実用に際して
の一層の薄肉化を可能とし、コストダウンに貢献
しうるとともに、成形性の向上により箔単体であ
るいはラミネート材の素材として成形可能な範囲
を増大し、食品や化粧品の包装容器や電子部品等
への適用可能な範囲を拡大しうる。
実施例
次にこの発明の実施例を比較例との対比におい
て示す。
第１表に示す各種組成のAl―Fe―Mn合金を常
法により鋳塊に製造したのち、580℃×10時間の
均質化処理を施した。次いで、これらの鋳塊を厚
ま４mmまで熱間圧延したのち、厚さ0.6mmまで１
次冷間圧延を施し、続いて400℃×１時間の中間
焼鈍を行つた。さらにその後、各試料を厚さ0.05
mmまで２次間圧延を施したのち、370℃×１時間
で最終焼鈍を施した。
INDUSTRIAL APPLICATION FIELD This invention relates to an aluminum alloy foil that is used alone or as a laminate foil for packaging containers for foods and cosmetics, electronic parts, etc., and particularly relates to an aluminum alloy foil that has excellent formability. BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, aluminum alloy foils used for the above-mentioned purposes have generally been made of pure aluminum such as 1N30 alloy, which has good rollability, or 8011 alloy. The forming of these aluminum alloy foils into the above-mentioned packaging devices and the like has generally been carried out by deep drawing. However, recently, the forming process has shifted from deep drawing to overhanging, which has excellent productivity, and there has been a demand for thinner aluminum foil from a cost perspective. However, conventional aluminum alloy foils not only have poor ductility and are difficult to form to a sufficient overhang height during overhang processing, but also have problems in terms of strength and cannot adequately meet the demands for thinner walls. I couldn't do it. On the other hand, in order to refine the grains and improve ductility and strength, we used 8079 alloy with a high Fe content.
Rapid annealing has been carried out using a CAL (continuous annealing furnace), etc., but when rapid annealing is performed on 807 alloy, the crystal grains become coarser, which may actually deteriorate the ductility and formability. There was a problem like that. The present invention was made against this background, and an object of the present invention is to provide an aluminum alloy foil that has high strength and excellent formability. Means for Solving the Problems Therefore, this invention has Fe: 0.7 to 2.0wt%, Mn:
The object of the present invention is to provide an aluminum alloy foil with excellent formability, characterized in that it contains 0.05 to 0.2 wt%, and the remainder consists of aluminum and unavoidable impurities. In the composition of the above aluminum alloy foil, Fe
is effective in refining recrystallized grains, but if it is less than 0.7wt%, the effect is poor;
If the content exceeds 2.0 wt%, coarse compounds will increase and ductility will decrease. The desirable content of Fe is in the range of 1.0 to 1.5 wt%. Mn has the effect of reducing the solid solubility limit of Fe and promoting refinement of crystal grains, and is also effective in preventing coarsening of crystal grains during rapid annealing. It also contributes to improving the strength of the foil. If Mn is less than 0.05 wt%, these effects are poor, and if it exceeds 0.2 wt%, the n value (work hardening coefficient) decreases, resulting in a decrease in ductility (uniform elongation). Although it is preferable that the amount of unavoidable impurities in the aluminum alloy be small, the content of Si up to about 0.2 wt% and other elements up to about 0.05 wt% is allowed. The production of the above aluminum alloy foil is generally carried out by sequentially performing each essential process of hot rolling, cold rolling including foil rolling, and final annealing on an aluminum alloy ingot. Accordingly, intermediate annealing may be performed during cold rolling, that is, between primary cold rolling and secondary cold rolling, or homogenization treatment may be performed before hot rolling. Effects of the Invention As is clear from the Examples described below, the aluminum alloy foil of the present invention with a limited composition has fine crystal grains, high strength and elongation, and even better formability. Therefore, it is possible to make the foil even thinner in practical use, contributing to cost reduction, and the improvement in formability increases the range of moldability of the foil alone or as a material for laminates, making it suitable for food and cosmetics. The scope of applicability to packaging containers, electronic components, etc. can be expanded. Examples Next, examples of the present invention will be shown in comparison with comparative examples. Al--Fe--Mn alloys having various compositions shown in Table 1 were produced into ingots by a conventional method, and then homogenized at 580°C for 10 hours. Next, these ingots were hot rolled to a thickness of 4 mm, and then rolled to a thickness of 0.6 mm.
Next, cold rolling was performed, followed by intermediate annealing at 400°C for 1 hour. Furthermore, after that, each sample was cut to a thickness of 0.05
After performing two-dimensional rolling to mm, final annealing was performed at 370°C for 1 hour.
【表】
上記により得られた各箔材につき、結晶粒径、
引張強さ、伸びを調べるとともに、張出し加工を
施して張出し高さを調べ、成形性を評価した。な
お張出し高さはポンチ径50mm、ダイス径57mm、ポ
ンチ速度75mm／分の加工条件での破断までの成形
高さで示した。その結果を第２表に示す。[Table] For each foil material obtained above, the crystal grain size,
In addition to examining the tensile strength and elongation, the material was subjected to overhang processing and the overhang height was examined to evaluate the formability. The overhang height is shown as the forming height until breakage under the processing conditions of a punch diameter of 50 mm, die diameter of 57 mm, and punch speed of 75 mm/min. The results are shown in Table 2.
【表】
上記結果から明らかなように、本発明のアルミ
ニウム合金箔は、その条件を逸脱する比較例のも
のに較べ、強度、成形性いずれにも優れ、また結
晶粒も微細であることがわかる。[Table] As is clear from the above results, the aluminum alloy foil of the present invention has superior strength and formability, and has finer crystal grains than the comparative example that deviates from the above conditions. .
Claims (1)
み、残部がアルミニウム及び不可避不純物からな
ることを特徴とする成形性に優れたアルミニウム
合金箔。1. An aluminum alloy foil with excellent formability, characterized in that it contains Fe: 0.7 to 2.0 wt%, Mn: 0.05 to 0.2 wt%, and the remainder consists of aluminum and inevitable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4462386A JPS62149838A (en) | 1985-12-24 | 1986-02-28 | Aluminum alloy foil excellent in formability |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29558285A JPS62149857A (en) | 1985-12-24 | 1985-12-24 | Production of aluminum alloy foil having excellent formability |
| JP4462386A JPS62149838A (en) | 1985-12-24 | 1986-02-28 | Aluminum alloy foil excellent in formability |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29558285A Division JPS62149857A (en) | 1985-12-24 | 1985-12-24 | Production of aluminum alloy foil having excellent formability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62149838A JPS62149838A (en) | 1987-07-03 |
| JPH0542492B2 true JPH0542492B2 (en) | 1993-06-28 |
Family
ID=26384570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4462386A Granted JPS62149838A (en) | 1985-12-24 | 1986-02-28 | Aluminum alloy foil excellent in formability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62149838A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62250143A (en) * | 1986-04-21 | 1987-10-31 | Showa Alum Corp | Aluminum-alloy foil for package |
| BR9908089A (en) | 1998-02-18 | 2000-10-31 | Alcan Int Ltd | Production process of high-strength aluminum sheets |
| JP2012052158A (en) * | 2010-08-31 | 2012-03-15 | Toyo Aluminium Kk | Aluminum foil and container |
| JP5917807B2 (en) * | 2011-02-02 | 2016-05-18 | 東洋アルミニウム株式会社 | Packaging materials |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3571910A (en) * | 1967-08-11 | 1971-03-23 | Reynolds Metals Co | Method of making wrought aluminous metal articles |
| JPS5118362A (en) * | 1974-08-07 | 1976-02-13 | Sanyo Electric Co | GYOSHUFUJOBUNRISOCHI |
| JPS528244A (en) * | 1975-07-09 | 1977-01-21 | Mitsui Eng & Shipbuild Co Ltd | Floating wave power plant with propeller turbine |
| JPS55122603A (en) * | 1979-03-15 | 1980-09-20 | Mitsubishi Keikinzoku Kogyo Kk | Manufacture of aluminum foil |
| JPS57155340A (en) * | 1981-03-20 | 1982-09-25 | Mitsubishi Alum Co Ltd | Al alloy for fin of heat exchanger excellent in workability |
| JPS57164951A (en) * | 1981-04-02 | 1982-10-09 | Toyo Alum Kk | Aluminum product and its manufacture |
| JPS60145346A (en) * | 1984-01-09 | 1985-07-31 | Kobe Steel Ltd | Thin aluminum alloy plate having low tearing strength |
| JPS61170549A (en) * | 1985-01-25 | 1986-08-01 | Sukai Alum Kk | Production of aluminium foil |
-
1986
- 1986-02-28 JP JP4462386A patent/JPS62149838A/en active Granted
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3571910A (en) * | 1967-08-11 | 1971-03-23 | Reynolds Metals Co | Method of making wrought aluminous metal articles |
| JPS5118362A (en) * | 1974-08-07 | 1976-02-13 | Sanyo Electric Co | GYOSHUFUJOBUNRISOCHI |
| JPS528244A (en) * | 1975-07-09 | 1977-01-21 | Mitsui Eng & Shipbuild Co Ltd | Floating wave power plant with propeller turbine |
| JPS55122603A (en) * | 1979-03-15 | 1980-09-20 | Mitsubishi Keikinzoku Kogyo Kk | Manufacture of aluminum foil |
| JPS57155340A (en) * | 1981-03-20 | 1982-09-25 | Mitsubishi Alum Co Ltd | Al alloy for fin of heat exchanger excellent in workability |
| JPS57164951A (en) * | 1981-04-02 | 1982-10-09 | Toyo Alum Kk | Aluminum product and its manufacture |
| JPS60145346A (en) * | 1984-01-09 | 1985-07-31 | Kobe Steel Ltd | Thin aluminum alloy plate having low tearing strength |
| JPS61170549A (en) * | 1985-01-25 | 1986-08-01 | Sukai Alum Kk | Production of aluminium foil |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62149838A (en) | 1987-07-03 |
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