JP2000355723A - Aluminum alloy sheet and its production - Google Patents
Aluminum alloy sheet and its productionInfo
- Publication number
- JP2000355723A JP2000355723A JP11170269A JP17026999A JP2000355723A JP 2000355723 A JP2000355723 A JP 2000355723A JP 11170269 A JP11170269 A JP 11170269A JP 17026999 A JP17026999 A JP 17026999A JP 2000355723 A JP2000355723 A JP 2000355723A
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- weight
- aluminum alloy
- content
- lid
- present
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、飲料用缶等に使用
されるアルミニウム合金板及びその製造方法に関し、特
にコーヒー等の非炭酸飲料に使用されるスチール缶に巻
き締められるアルミニウム合金からなる蓋材に好適な低
コストのアルミニウム合金板及びその製造方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum alloy plate used for beverage cans and the like, and more particularly to a lid made of an aluminum alloy wound around a steel can used for non-carbonated beverages such as coffee. The present invention relates to a low-cost aluminum alloy plate suitable for a material and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】飲料用缶の蓋材は、塗料を塗布した後焼
き付けを行う、焼き付け塗装（以下、ＢＨという。）が
行われている。所定の強度を得るために用途により使用
されるアルミニウム合金材が異なる。例えば、ビール等
の炭酸飲料用の蓋材にはＭｇを４重量％以上含有する高
強度のＪＩＳ ５１８２合金が使用されている。一方、
コーヒー等の非炭酸飲料用の蓋材には比較的強度が低い
ＪＩＳ ５０５２合金が使用されている。この非炭酸飲
料用の蓋材では炭酸飲料用と比較して、内圧がかからな
いため、あまり高強度である必要がなく、塗装後の耐力
が２２０乃至２７０Ｎ／ｍｍ2であればよい。従って、
合金としては適度な成形性と開蓋性を維持しつつ、製造
コストが安いものが要求される。ＪＩＳ ５０５２合金
がこれに相当し、Ｍｇ含有量が少ないため、Ｍｇ配合費
の低減できる利点がある。また、圧延回数が少ないとい
う優れた圧延性を有するため採用されている。2. Description of the Related Art A baking finish (hereinafter, referred to as BH) is applied to a lid material of a beverage can to perform baking after applying a paint. The aluminum alloy material used varies depending on the application to obtain a predetermined strength. For example, a high-strength JIS 5182 alloy containing 4% by weight or more of Mg is used for a lid material for carbonated beverages such as beer. on the other hand,
JIS 5052 alloy having relatively low strength is used for a lid material for non-carbonated beverages such as coffee. Since the internal pressure is not applied to the lid material for non-carbonated beverages as compared with that for carbonated beverages, the strength does not need to be very high, and the proof strength after coating may be 220 to 270 N / mm 2 . Therefore,
As the alloy, an alloy having low production cost while maintaining appropriate moldability and lid opening property is required. The JIS 5052 alloy corresponds to this and has an advantage that the Mg content can be reduced because the Mg content is small. In addition, it is adopted because it has an excellent rolling property that the number of times of rolling is small.
【０００３】また、製造方法としては成形性の観点から
熱間圧延−冷間圧延−焼鈍（ＣＡＬ）−冷間圧延処理を
する中間焼鈍タイプが採用されている。As a manufacturing method, an intermediate annealing type that performs hot rolling, cold rolling, annealing (CAL), and cold rolling is used from the viewpoint of formability.
【０００４】ＪＩＳ ５０５２合金は品質的には強度、
成形性及び開蓋性をバランス良く満足させている。その
内容としては、結晶粒の微細化、蓋の安定性の目安とな
る４５°方向耳の低位安定化及び開蓋性の目安となる化
合物分布の適性化である。[0004] JIS 5052 alloy is strong in terms of quality,
The moldability and lid openability are satisfied in a well-balanced manner. The contents include miniaturization of crystal grains, stabilization of the ear at a low angle of 45 °, which is a measure of lid stability, and optimization of the compound distribution, which is a measure of lid openability.
【０００５】蓋材の具体例としては、Ｍｇ、Ｃｕ及びＭ
ｎを含有するアルミニウム合金材が提案されている（特
公平３−３１７７９号公報及び特開昭５８−１２６９５
２号公報等）。また、Ｍｇと、Ｍｎ、Ｃｒ及びＣｕから
なる群から選択された１種と、Ｔｉ及び／又はＢとを含
有するアルミニウム合金材が提案されている（特開昭５
６−１０２５６５号公報）。[0005] Specific examples of the cover material include Mg, Cu and M.
An aluminum alloy material containing n has been proposed (JP-B-3-31779 and JP-A-58-12695).
No. 2). Further, an aluminum alloy material containing Mg, one selected from the group consisting of Mn, Cr, and Cu, and Ti and / or B has been proposed (Japanese Patent Laid-Open No. Sho 5).
No. 6-102565).
【０００６】更に、蓋材の製造方法としては、均質化熱
処理及び熱間圧延を施した後に、焼鈍を施して平均結晶
粒径を２５μｍにして、１０％以上の冷間圧延を行う方
法が提案されている（特公平３−３１７７９号公報及び
特開昭５８−１２６９５２号公報等）。Further, as a method of manufacturing a lid material, there has been proposed a method of performing a homogenizing heat treatment and hot rolling, followed by annealing to set the average crystal grain size to 25 μm and performing cold rolling of 10% or more. (JP-B-3-31779, JP-A-58-126952, etc.).
【０００７】[0007]
【発明が解決しようとする課題】しかし、ＪＩＳ ５１
８２合金、特公平３−３１７７９号公報、特開昭５６−
１０２５６５号公報及び特開昭５８−１２６９５２号公
報等に開示されているＭｇを含有するアルミニウム合金
を蓋材に使用すると、ＢＨ後の強度が高くなる反面、成
形性及び開蓋性が低下するという問題点がある。However, JIS 51
82 alloy, JP-B-3-31779, JP-A-56-
When an aluminum alloy containing Mg, which is disclosed in JP-A-102565 and JP-A-58-126952, is used for a cover material, the strength after BH is increased, but the moldability and the openability are reduced. There is a problem.
【０００８】また、ダイオキシン及びＢＰＡ等の近年の
環境問題から、脱塩化ビニル及び水性塗料化が進められ
ている。それに伴い、塗料の焼き付け条件が例えば、３
００℃前後の高温から２５０℃前後の低温側に移る傾向
にある。このため、塗料の変更により従来ほど高い焼き
付け温度は必要でなくなり、従来のような高いＢＨ性能
が要求されなくなっている。更に、リサイクル及びコス
トダウンの要望もある。Further, due to recent environmental problems such as dioxin and BPA, vinyl chloride and water-based paint have been developed. Accordingly, the baking condition of the paint is, for example, 3
There is a tendency to shift from a high temperature of about 00 ° C. to a low temperature side of about 250 ° C. For this reason, by changing the paint, a higher baking temperature than in the past is not required, and a high BH performance as in the past is no longer required. Further, there is a demand for recycling and cost reduction.
【０００９】このようなことから、所定の強度、成形性
及び開蓋性等の蓋材の要求特性を満足しつつ、Ｍｇの含
有量を下げることが望まれている。In view of the above, it is desired to reduce the content of Mg while satisfying the required properties of the cover material such as predetermined strength, moldability, and openability.
【００１０】更に、特公平３−３１７７９号公報及び特
開昭５８−１２６９５２号公報等に開示されている製造
方法では、品質的には優れるものの、工程が煩雑になる
と共に、製造コストが嵩むという問題点がある。Further, the manufacturing methods disclosed in Japanese Patent Publication No. 3-31779 and Japanese Patent Laid-Open Publication No. Sho 58-126952 are excellent in quality, but require complicated steps and high manufacturing costs. There is a problem.
【００１１】本発明はかかる問題点に鑑みてなされたも
のであって、所定の強度、成形性及び開蓋性等の蓋材の
要求特性を満足しつつ、Ｍｇの含有量が低く、低コスト
のアルミニウム合金板及びその製造方法を提供すること
を目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and satisfies required characteristics of a cover material such as predetermined strength, moldability, and openability, and has a low Mg content and a low cost. It is an object of the present invention to provide an aluminum alloy plate and a method for producing the same.
【００１２】[0012]
【課題を解決するための手段】本発明に係るアルミニウ
ム合金板は、Ｍｇ：１．２乃至１．９重量％、Ｍｎ：
０．２５乃至０．４８重量％及びＦｅ：０．２５乃至
０．５０重量％を含有し、更にＣｕ：０．０２乃至０．
１５重量％、Ｓｉ：０．０５乃至０．３０重量％、Ｚ
ｎ：０．０３乃至０．５０重量％及びＣｒ：０．０２乃
至０．３０重量％からなる群から選択された少なくとも
１種を含有すると共に、残部がＡｌ及び不可避的不純物
からなることを特徴とする。The aluminum alloy plate according to the present invention comprises: 1.2 to 1.9% by weight of Mg;
It contains 0.25 to 0.48% by weight and Fe: 0.25 to 0.50% by weight, and further contains Cu: 0.02 to 0.5%.
15% by weight, Si: 0.05 to 0.30% by weight, Z
n: at least one selected from the group consisting of 0.03 to 0.50% by weight and Cr: 0.02 to 0.30% by weight, with the balance being Al and unavoidable impurities. And
【００１３】本発明に係るアルミニウム合金板の製造方
法は、Ｍｇ：１．２乃至１．９重量％、Ｍｎ：０．２５
乃至０．４８重量％及びＦｅ：０．２５乃至０．５０重
量％を含有し、更にＣｕ：０．０２乃至０．１５重量
％、Ｓｉ：０．０５乃至０．３０重量％、Ｚｎ：０．０
３乃至０．５０重量％及びＣｒ：０．０２乃至０．３０
重量％からなる群から選択された少なくとも１種を含有
すると共に、残部がＡｌ及び不可避的不純物からなる組
成を有する合金材に均質化熱処理を行う工程と、熱間圧
延終了板厚が２．０乃至３．０ｍｍ、熱間圧延終了温度
が２９０乃至３６０℃で組織が再結晶組織となるように
熱間圧延を行う工程と、冷間圧延終了温度が１４０乃至
１８０℃となるように冷間圧延を行う工程と、を有する
ことを特徴とする。The method for producing an aluminum alloy sheet according to the present invention is as follows: Mg: 1.2 to 1.9% by weight, Mn: 0.25%
-0.48% by weight and Fe: 0.25-0.50% by weight, Cu: 0.02-0.15% by weight, Si: 0.05-0.30% by weight, Zn: 0 .0
3 to 0.50% by weight and Cr: 0.02 to 0.30
A homogenizing heat treatment for an alloy material containing at least one selected from the group consisting of Al and unavoidable impurities, and having a thickness of 2.0 mm after hot rolling. Hot rolling to form a recrystallized structure at a hot rolling end temperature of 290 to 360 ° C, and cold rolling so that the cold rolling end temperature becomes 140 to 180 ° C. And performing the following.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施例に係るアル
ミニウム合金板及び製造方法について詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an aluminum alloy sheet and a manufacturing method according to an embodiment of the present invention will be described in detail.
【００１５】本願発明者等が蓋材に要求される強度、成
形性及び開蓋性について鋭意実験研究した結果、コスト
メリットのある非炭酸用蓋材に好適なアルミニウム合金
板を開発することに成功した。具体的には、低Ｍｇ化を
ベースにＭｇ、Ｍｎ及びＦｅを必須成分とし、Ｃｕ、Ｓ
ｉ、Ｚｎ及びＣｒからなる群から選択された少なくとも
１種を含有させたアルミニウム合金板成分を最適化する
ことにより、得ることができることを見出した。As a result of intensive experiments and research on the strength, moldability and openability required for the lid material, the inventors of the present application have succeeded in developing an aluminum alloy plate suitable for a non-carbonated lid material having a cost advantage. did. Specifically, based on low Mg, Mg, Mn and Fe are essential components, and Cu, S
It has been found that it can be obtained by optimizing an aluminum alloy plate component containing at least one selected from the group consisting of i, Zn and Cr.
【００１６】また、アルミニウム合金板成分の最適化に
伴う圧延回数の減少等の圧延技術を開発し、更に焼鈍省
略を推進し、アルミニウム合金材に均質化熱処理を行
い、熱間圧延終了板厚が２．０乃至３．０ｍｍ、熱間圧
延終了温度が２９０乃至３６０℃で組織が再結晶組織と
なるように熱間圧延を行い、その後冷間圧延終了温度が
１４０乃至１８０℃となるように冷間圧延を行うことに
より、所定の強度、結晶粒の微細化及び４５°低耳安定
化等の成形性並びに開蓋性を維持したアルミニウム合金
板を製造できることを見出した。In addition, a rolling technique has been developed to reduce the number of rollings in accordance with the optimization of the components of the aluminum alloy sheet. Further, the omission of annealing has been promoted, the aluminum alloy material has been subjected to a homogenizing heat treatment, and Hot rolling is performed so that the structure becomes a recrystallized structure at 2.0 to 3.0 mm, hot rolling end temperature is 290 to 360 ° C, and then cold rolling is performed so that the cold rolling end temperature becomes 140 to 180 ° C. It has been found that by performing cold rolling, it is possible to produce an aluminum alloy sheet which maintains the formability such as the predetermined strength, the refinement of crystal grains, the stabilization of 45 ° low ears, and the openability.
【００１７】なお、熱間圧延工程前に行われる所望の組
成を有するアルミニウム合金材に均質化熱処理を行う工
程において、均質化熱処理条件は４５０乃至５５０℃で
１時間程度であることが好ましい。In the step of performing a homogenizing heat treatment on an aluminum alloy material having a desired composition, which is performed before the hot rolling step, the condition of the homogenizing heat treatment is preferably about 450 to 550 ° C. for about 1 hour.
【００１８】以下、本発明のアルミニウム合金板の数値
限定理由について説明する。Hereinafter, the reasons for limiting the numerical values of the aluminum alloy sheet of the present invention will be described.
【００１９】Ｍｇ：１．２乃至１．９重量％ Ｍｇは強度向上に寄与すると共に、Ｍｎとの組み合わせ
で耳の安定化を図る。更に、ＳｉとはＭｇ2Ｓｉの化合
物を形成し、開蓋性の向上に効果を示す。Ｍｇの含有量
が１．２重量％未満では強度向上、耳の安定化及び開蓋
性のいずれにおいても効果が不十分である。一方、Ｍｇ
の含有量が１．９重量％を超えると、強度及び化合物の
増加により、成形性及び開蓋性が劣る。従って、Ｍｇの
含有量は１．２乃至１．９重量％とする。 Mg: 1.2 to 1.9% by weight Mg contributes to the improvement of strength and stabilizes the ear in combination with Mn. Further, Si forms a compound of Mg 2 Si, which is effective in improving the lid opening property. If the content of Mg is less than 1.2% by weight, the effect is insufficient in all of the improvement in strength, stabilization of the ear, and openability of the lid. On the other hand, Mg
When the content exceeds 1.9% by weight, the moldability and the lid opening property are inferior due to the increase in the strength and the compound. Therefore, the content of Mg is set to 1.2 to 1.9% by weight.
【００２０】Ｍｎ：０．２５乃至０．４８重量％ ＭｎはＭｇと同様に、強度向上に寄与すると共に、Ｍｇ
との組み合わせで耳の安定化を図る。また、Ｆｅ、Ｓｉ
及びＡｌとでＡｌ−Ｍｎ−Ｆｅ−Ｓｉのα相を形成し、
開蓋性を更に向上させる。Ｍｎの含有量が０．２５重量
％未満では、強度向上、耳の安定化及び開蓋性の効果が
少ない。一方、Ｍｎの含有量が０．４８重量％を超える
と、Ｍｇと同様に強度及び化合物の増加により、成形性
及び開蓋性が劣る。従って、Ｍｎの含有量は０．２５乃
至０．４８重量％とする。 Mn: 0.25 to 0.48% by weight Mn contributes to strength improvement like Mg, and
Stabilize the ear in combination with In addition, Fe, Si
And Al to form an α-phase of Al-Mn-Fe-Si,
Opening property is further improved. When the content of Mn is less than 0.25% by weight, the effects of improving strength, stabilizing the ear, and opening the lid are small. On the other hand, when the content of Mn exceeds 0.48% by weight, the moldability and the lid opening property are inferior due to the increase in the strength and the compound as in the case of Mg. Therefore, the content of Mn is set to 0.25 to 0.48% by weight.
【００２１】Ｆｅ：０．２５乃至０．５０重量％ ＦｅはＭｎ、Ｓｉ及びＡｌとで化合物を形成し、開蓋性
に寄与すると共に、Ｆｅは特に結晶粒の微細化と４５°
方向耳の形成に効果がある。Ｆｅの含有量が０．２５重
量％未満では、開蓋性、結晶粒の微細化及び４５°方向
耳の効果が不十分である。一方、Ｆｅの含有量が０．５
０重量％を超えると、開蓋性が劣る。従って、Ｆｅの含
有量は０．２５乃至０．５０重量％とする。より好まし
くは、Ｆｅの含有量は０．３０乃至０．４０重量％であ
る。 Fe: 0.25 to 0.50% by weight Fe forms a compound with Mn, Si and Al, and contributes to the openability of the cover.
It is effective in forming the direction ear. If the Fe content is less than 0.25% by weight, the effects of opening the lid, refining the crystal grains, and the 45 ° direction ear are insufficient. On the other hand, when the content of Fe is 0.5
When the content exceeds 0% by weight, the lid opening property is poor. Therefore, the content of Fe is set to 0.25 to 0.50% by weight. More preferably, the content of Fe is 0.30 to 0.40% by weight.
【００２２】Ｃｕ：０．０２乃至０．１５重量％ Ｃｕは強度の向上に効果がある。Ｃｕの含有量が０．０
２重量％未満では、強度の向上の効果が不十分である。
一方、Ｃｕの含有量が０．１５重量％を超えると、耐食
性が低下する。従って、Ｃｕの含有量は０．０２乃至
０．１５重量％とする。 Cu: 0.02 to 0.15% by weight Cu is effective in improving strength. Cu content of 0.0
If it is less than 2% by weight, the effect of improving the strength is insufficient.
On the other hand, when the content of Cu exceeds 0.15% by weight, the corrosion resistance decreases. Therefore, the content of Cu is set to 0.02 to 0.15% by weight.
【００２３】Ｓｉ：０．０５乃至０．３０重量％ Ｓｉは化合物を形成する１つの元素であると共に、アル
ミニウム合金板の製造工程中で析出物の形成を促進し耳
の発生に影響を与える。Ｓｉの含有量が０．０５重量％
未満では、化合物の形成及び析出物の形成の効果が少な
い。一方、Ｓｉの含有量が０．３０重量％を超えると、
熱処理時に析出物が生成し、結晶粒の粗大化及び０°−
１８０°耳の増加を招く。従って、Ｓｉの含有量は０．
０５乃至０．３０重量％とする。 Si: 0.05 to 0.30 wt% Si is one element forming a compound, and also promotes the formation of precipitates during the manufacturing process of the aluminum alloy plate and affects the generation of ears. Si content 0.05% by weight
If it is less than 50%, the effect of forming a compound and forming a precipitate is small. On the other hand, when the content of Si exceeds 0.30% by weight,
Precipitates are formed during heat treatment, causing coarsening of crystal grains and 0 °-
180 ° increase in ears. Therefore, the content of Si is 0.1.
It should be from 0.05 to 0.30% by weight.
【００２４】Ｚｎ：０．０３乃至０．５０重量％ Ｚｎは化合物の均一微細化に効果がある。Ｚｎの含有量
が０．０３重量％未満では化合物の均一微細化の効果が
少ない。一方、Ｚｎの含有量が０．５０重量％を超えて
も、特に問題はないが、添加するとコストが嵩む。従っ
て、Ｚｎの含有量は０．０３乃至０．５０重量％とす
る。 Zn: 0.03 to 0.50% by weight Zn is effective in making the compound uniform and fine. When the content of Zn is less than 0.03% by weight, the effect of uniformly miniaturizing the compound is small. On the other hand, if the content of Zn exceeds 0.50% by weight, there is no particular problem, but if added, the cost increases. Therefore, the content of Zn is set to 0.03 to 0.50% by weight.
【００２５】Ｃｒ：０．０２乃至０．３０重量％ Ｃｒは強度向上に効果がある。Ｃｒの含有量が０．０２
重量％未満では強度向上の効果が十分でない。一方、Ｃ
ｒの含有量が０．３０重量％を超えると、化合物が粗大
になり、成形性及び開蓋性を低下させる。従って、Ｃｒ
の含有量は０．０２乃至０．３０重量％とする。 Cr: 0.02 to 0.30% by weight Cr is effective in improving the strength. Cr content of 0.02
If the amount is less than% by weight, the effect of improving strength is not sufficient. On the other hand, C
When the content of r exceeds 0.30% by weight, the compound becomes coarse, and the moldability and the lid opening property are reduced. Therefore, Cr
Is 0.02 to 0.30% by weight.
【００２６】なお、Ｔｉ及びＢは０．１重量％未満並び
にＣａ及Ｎａ等の不純物については通常のレベルであれ
ば、本発明の効果に悪い影響を与えず、認められる範囲
である。It is to be noted that Ti and B are less than 0.1% by weight, and impurities such as Ca and Na are at normal levels without adversely affecting the effects of the present invention, and are within the permissible range.
【００２７】以下、本発明のアルミニウム合金板の製造
方法の数値限定理由について説明する。Hereinafter, the reasons for limiting the numerical values of the method for manufacturing an aluminum alloy sheet of the present invention will be described.
【００２８】熱間圧延終了板厚：２．０乃至３．０ｍｍ 熱間圧延は通常、粗圧延機により厚さが４００乃至６０
０ｍｍの鋳塊をおよそ１／１０以下の厚さにし、その後
連続的に３乃至４タンデムの圧延をしてＨｏｔｃｏｉｌ
とする。通常Ｈｏｔ ｃｏｉｌの厚さはおよそ２.０ｍ
ｍ以上である。本発明においてはＨｏｔ ｃｏｉｌの状
態で完全に再結晶させると共に、製品板の耳率に関与す
る集合組織を制御する必要がある。熱間圧延終了板厚が
２．０ｍｍ未満では、製品板での耳率を４５°方向で０
乃至５％にすることが難しく、０°−１８０°耳による
蓋成形時のトラブルを招く。一方、熱間圧延終了板厚が
３．０ｍｍを超えると、未再結晶が残存し、４５°方向
耳が５％を超える。従って、熱間圧延終了板厚は２．０
乃至３．０ｍｍとする。 Hot Roll Finished Thickness: 2.0 to 3.0 mm Hot rolling usually has a thickness of 400 to 60 mm by a rough rolling mill.
A 0 mm ingot is reduced to a thickness of about 1/10 or less, and then continuously rolled by 3 to 4 tandems to form a Hotcoil.
And Normally the thickness of Hot coil is about 2.0m
m or more. In the present invention, it is necessary to completely recrystallize in a hot coil state and to control the texture related to the ear ratio of the product plate. When the thickness of the hot-rolled sheet is less than 2.0 mm, the ear ratio on the product sheet is 0 in the 45 ° direction.
It is difficult to set the thickness to 5% or less, which causes a trouble at the time of forming the lid with 0 ° -180 ° ears. On the other hand, if the hot-rolled end plate thickness exceeds 3.0 mm, unrecrystallized crystal remains, and the 45 ° direction edge exceeds 5%. Therefore, the sheet thickness after hot rolling is 2.0
To 3.0 mm.
【００２９】熱間圧延終了温度：２９０乃至３６０℃ 再結晶の観点から熱間圧延終了温度の管理も重要であ
る。熱間圧延終了温度が２９０℃未満では、未再結晶が
残存する。一方、熱間圧延終了温度が３６０℃を超える
と、結晶粒が粗大になり、成形性の低下を招く。従っ
て、熱間圧延終了温度は２９０乃至３６０℃とする。 Hot rolling end temperature: 290 to 360 ° C. From the viewpoint of recrystallization, it is also important to control the hot rolling end temperature. If the hot rolling end temperature is lower than 290 ° C., unrecrystallized remains. On the other hand, when the hot-rolling end temperature exceeds 360 ° C., the crystal grains become coarse, and the formability is reduced. Therefore, the hot rolling end temperature is set to 290 to 360 ° C.
【００３０】冷間圧延終了温度：１４０乃至１８０℃ 通常は、熱間圧延終了後に焼鈍を含めた冷間圧延を施し
て製品厚（板）とする。例えば、荒焼鈍、中間焼鈍及び
仕上げ焼鈍があるが、本発明においては全く焼鈍は行わ
ない。Ｈｏｔ ｃｏｉｌを冷間圧延して製品板とする徹
底的に合理化した工程である。そのためには、上述の組
成及び製造工程を確実に実施すると共に、適性強度での
安定化が重要である。特に、冷間圧延では仕上げ出側温
度を制御する必要がある。冷間圧延終了温度が１４０℃
未満では、冷間圧延後の製品板の回復が不十分で、かつ
バラツキが生じ易い。一方、冷間圧延終了温度が１８０
℃を超えると、冷間圧延後の製品板の回復が進みすぎて
軟化による強度不足を招く。従って、冷間圧延終了温度
は１４０乃至１８０℃とする。 Cold rolling end temperature: 140 to 180 ° C. Normally, after hot rolling, cold rolling including annealing is performed to obtain a product thickness (plate). For example, there are rough annealing, intermediate annealing, and finish annealing, but in the present invention, no annealing is performed. This is a thoroughly streamlined process of hot rolling a hot coil into a product plate. For that purpose, it is important to stably carry out the above-mentioned composition and manufacturing process, and at the appropriate strength. In particular, in cold rolling, it is necessary to control the temperature on the finishing side. Cold rolling end temperature is 140 ° C
If it is less than 10, the recovery of the product sheet after the cold rolling is insufficient, and variation is apt to occur. On the other hand, the cold rolling end temperature is 180
If the temperature exceeds ℃, the recovery of the product sheet after the cold rolling proceeds too much, resulting in insufficient strength due to softening. Therefore, the cold rolling end temperature is set to 140 to 180 ° C.
【００３１】なお、この冷間圧延終了後の仕上げ焼鈍も
省略する。これを達成する手段としては、連続圧延があ
る。これは、タンデムに並べた圧延機で熱間圧延が終了
した板を所定の厚さまで一気に圧延し、圧延間の熱損失
を生じさせない圧延方法又は圧延間の発熱を一定にして
行う圧延方法である。これらの方法が連続圧延の手段と
して最適である。The finish annealing after the end of the cold rolling is also omitted. Means for achieving this is continuous rolling. This is a rolling method in which a plate that has been hot-rolled in a rolling mill arranged in tandem is rolled at a stroke to a predetermined thickness, and a rolling method that does not cause heat loss during rolling or a rolling method that performs constant heat generation during rolling. . These methods are optimal as means for continuous rolling.
【００３２】蓋材は成形前に塗装が施される。通常はコ
ーティングラインで塗装されるが、従来から使用されて
いる技術であれば本発明の効果を損なうことはない。具
体的には溶剤及び例えば、塩化ビニル又はエポキシ系の
水性の塗料を連続してアルミニウム合金コイルに塗装す
る。処理温度及び時間は塗料の種類はもちろんラインの
性能により異なる。The lid material is painted before molding. Usually, the coating is performed on a coating line, but the effects of the present invention are not impaired if the technology is conventionally used. Specifically, a solvent and a water-based paint such as vinyl chloride or epoxy are continuously applied to the aluminum alloy coil. The processing temperature and time depend not only on the type of paint but also on the performance of the line.
【００３３】[0033]
【実施例】以下、本実施例方法により蓋材を作製し、本
発明の範囲に入るアルミニウム合金板の実施例につい
て、機械的性質及び蓋特性を比較例と比較して具体的に
説明する。EXAMPLES Hereinafter, a lid material is manufactured by the method of this example, and mechanical properties and lid characteristics of an aluminum alloy plate within the scope of the present invention will be specifically described in comparison with comparative examples.
【００３４】第１実施例 表１に示す成分の厚さが５５０ｍｍのアルミニウム合金
鋳塊に５００℃の温度で２時間の均質化熱処理を施し、
熱間圧延にて板厚を２．５ｍｍとした。合金No.１につ
いては熱間圧延終了温度を変化させた。そのほかの合金
については熱間圧延終了温度を３２０℃の目標でＨｏｔ
ｃｏｉｌに巻き上げた。その後、冷間圧延を連続的に
行い、冷間圧延終了温度を１６０℃で板厚を０．２５ｍ
ｍとした。その後、塗装を想定したベーキングを２５０
℃の温度で２０秒間行った。 First Example An aluminum alloy ingot having a thickness of 550 mm with the components shown in Table 1 was subjected to a homogenizing heat treatment at a temperature of 500 ° C. for 2 hours.
The thickness was set to 2.5 mm by hot rolling. For alloy No. 1, the hot rolling end temperature was changed. For other alloys, the hot rolling end temperature is set at
coil. Thereafter, cold rolling is continuously performed, the cold rolling end temperature is 160 ° C., and the sheet thickness is 0.25 m.
m. After that, baking for 250 minutes
C. for 20 seconds.
【００３５】得られたアルミニウム合金板の機械的性質
及び蓋特性について調査した。機械的性質については引
張応力、降伏応力及び伸びを測定した。蓋特性について
は、耳率、リベット性、開蓋性及び耐衝撃性について測
定した。The mechanical properties and lid characteristics of the obtained aluminum alloy sheet were investigated. For mechanical properties, tensile stress, yield stress and elongation were measured. Regarding the lid characteristics, the ear ratio, rivet properties, lid opening properties and impact resistance were measured.
【００３６】耳率については、絞り比を１．６７でカッ
プを成形し、山谷の差を平均絞り高さで除して耳率を求
めた。耳率の評価は４５°方向で１乃至５％のものを良
好とし、これを○とし、これ以外のものを△とした。な
お、表１中の耳率の欄の「―」は０°−１８０°方向の
耳を示し、これは蓋の安定性を欠いたものであり、これ
も△とした。The ear ratio was determined by molding a cup with a drawing ratio of 1.67 and dividing the difference between the peaks and valleys by the average drawing height. The ear ratio was evaluated as good when it was 1 to 5% in the 45 ° direction. In addition, “-” in the column of ear ratio in Table 1 indicates an ear in the 0 ° -180 ° direction, which lacked the stability of the lid, and was also indicated by Δ.
【００３７】リベット性については、直径６ｍｍ、４ｍ
ｍ及び３ｍｍの３回の張り出し絞り加工を行った。この
張り出し絞り加工による高さが１．６０ｍｍ以上を良好
とし、これを○とし、これ以外のものを△とした。Regarding the rivet property, the diameter is 6 mm, 4 m
Three overhang drawing processes of m and 3 mm were performed. A height of 1.60 mm or more obtained by the overdrawing process was regarded as good, this was evaluated as ○, and the others were evaluated as Δ.
【００３８】開蓋性については、蓋成形後に初期の開蓋
強度を測定し、スコア残厚１００μｍの条件で、開蓋強
度が１．０乃至１．５ｋｇ以内であれば良好とし、これ
を○とし、これ以外のものを△とした。With respect to the lid opening property, the initial lid opening strength after the lid was formed was measured, and under the condition that the score remaining thickness was 100 μm, if the lid opening strength was within 1.0 to 1.5 kg, it was determined to be good. And the others were marked with △.
【００３９】耐衝撃性については、内容物を充填した
後、蓋を下側にして５０ｃｍの高さからコンクリートの
上に落下させ、スコア破裂のないものを良好とし、これ
を○とし、これ以外のものを△とした。これらの結果を
表２に示す。With regard to the impact resistance, after filling the contents, the container was dropped on concrete with the lid facing down from a height of 50 cm, and those without score rupture were evaluated as good. Was marked as △. Table 2 shows the results.
【００４０】[0040]
【表１】 [Table 1]
【００４１】[0041]
【表２】 [Table 2]
【００４２】上記表２に示すように、本発明の範囲に入
る実施例No.１乃至５は機械的性質及び蓋特性について
良好な結果を得ることができた。As shown in Table 2 above, Examples Nos. 1 to 5 falling within the scope of the present invention were able to obtain good results in mechanical properties and lid properties.
【００４３】一方、比較例No.８乃至１９は機械的性質
及び蓋特性について良好な結果を得ることができなかっ
た。なお、リベット性は結晶粒径及び化合物分布に影響
を受け、開蓋性は化合物分布及び強度に影響を受ける。On the other hand, in Comparative Examples Nos. 8 to 19, good results could not be obtained for the mechanical properties and the lid properties. Note that the rivet property is affected by the crystal grain size and the compound distribution, and the lid opening property is affected by the compound distribution and the strength.
【００４４】比較例No.８は熱間圧延終了温度が本発明
の範囲未満であるため、組織が完全に再結晶粒にはなら
ず未再結晶粒が残存し、リベット性及び耐衝撃性が劣っ
た。In Comparative Example No. 8, since the hot rolling end temperature was lower than the range of the present invention, the structure did not become completely recrystallized grains but unrecrystallized grains remained, and the rivet property and impact resistance were poor. inferior.
【００４５】比較例No.９は熱間圧延終了温度が本発明
の範囲を超えるため、０°−１８０°方向耳が発生する
と共に、結晶粒が粗大化してリベット性が劣った。In Comparative Example No. 9, since the hot rolling end temperature exceeded the range of the present invention, a 0 ° -180 ° direction edge was generated, and the crystal grains became coarse, resulting in poor rivet properties.
【００４６】比較例No.１０はＭｇの含有量が本発明の
範囲未満であるため、耳が安定化せず０°−１８０°方
向耳が発生した。In Comparative Example No. 10, since the Mg content was less than the range of the present invention, the ear was not stabilized, and a 0 ° -180 ° direction ear was generated.
【００４７】比較例No.１１はＭｇの含有量が本発明の
範囲を超えるため、強度が増加し成形性が劣り開蓋性が
劣った。In Comparative Example No. 11, since the Mg content exceeded the range of the present invention, the strength was increased, the moldability was poor, and the lid opening property was poor.
【００４８】比較例No.１２はＭｎの含有量が本発明の
範囲未満であるため、耳が安定化せず０°−１８０°方
向耳が発生すると共に、開蓋性が劣った。In Comparative Example No. 12, since the Mn content was less than the range of the present invention, the ear was not stabilized, a 0 ° -180 ° direction ear was generated, and the lid opening property was poor.
【００４９】比較例No.１３はＭｎの含有量が本発明の
範囲を超えているため、強度及び化合物が増加し、リベ
ット性及び耐衝撃性が劣った。In Comparative Example No. 13, since the Mn content exceeded the range of the present invention, the strength and the compound increased, and the rivet property and the impact resistance were poor.
【００５０】比較例No.１４はＦｅの含有量が本発明の
範囲未満であるため、０°−１８０°方向耳が発生する
と共に、リベット性及び開蓋性が劣った。In Comparative Example No. 14, since the Fe content was less than the range of the present invention, a 0 ° -180 ° direction ear was generated, and the rivet property and the lid opening property were poor.
【００５１】比較例No.１５はＦｅの含有量が本発明の
範囲を超えているため、リベット性及び耐衝撃性が劣っ
た。Comparative Example No. 15 was inferior in rivet properties and impact resistance because the Fe content exceeded the range of the present invention.
【００５２】比較例No.１６はＣｕの含有量が本発明の
範囲を超えているため、リベット性及び耐衝撃性が劣っ
た。Comparative Example No. 16 was inferior in rivet properties and impact resistance because the Cu content exceeded the range of the present invention.
【００５３】比較例No.１７はＳｉの含有量が本発明の
範囲を超えているため、熱処理時に析出物が生成し、０
−１８０°耳が発生した。また、結晶粒が粗大化し、耐
衝撃性が劣った。In Comparative Example No. 17, since the Si content exceeded the range of the present invention, a precipitate was formed during the heat treatment,
A -180 ° ear developed. In addition, the crystal grains became coarse and the impact resistance was poor.
【００５４】比較例No.１８はＺｎの含有量が本発明の
範囲を超えているため、リベット性及び耐衝撃性が劣っ
た。Comparative Example No. 18 was inferior in rivet properties and impact resistance because the Zn content exceeded the range of the present invention.
【００５５】比較例No．１９はＣｒの含有量が本発明の
範囲を超えているため、化合物が粗大になり、リベット
性及び対衝撃性が劣った。Comparative Example No. In No. 19, since the content of Cr exceeded the range of the present invention, the compound became coarse, and the rivet property and impact resistance were poor.
【００５６】第２実施例 表１に示すアルミニウム合金を本発明実施例の方法によ
り板厚２．５ｍｍの板に加工した後、１回の冷間圧延率
を最大にして、板厚０．２５ｍｍまでのパス回数を測定
した。 Second Embodiment The aluminum alloy shown in Table 1 was processed into a plate having a thickness of 2.5 mm by the method of the embodiment of the present invention. The number of passes up to was measured.
【００５７】合金No.１、６、８、１０及び１１がパス
回数が３回であり、高冷間圧延が可能であった。一方、
合金No.７及び９はパス回数が４回であった。本発明は
パス回数の低減にも効果があった。Alloy Nos. 1, 6, 8, 10 and 11 had three passes, and could be subjected to high cold rolling. on the other hand,
Alloy Nos. 7 and 9 had four passes. The present invention was also effective in reducing the number of passes.
【００５８】第３実施例 表１に示す合金No.１の組成を有するアルミニウム合金
材を本発明の範囲内で均質化熱処理及び熱間圧延処理を
し、パス間発熱を制御して製品板厚での冷間圧延終了温
度を１２０℃、１６０℃及び１９０℃で冷間圧終了し
た。その後、塗装を想定したベーキングを２５０℃の温
度で２０秒間行った。 Third Embodiment An aluminum alloy material having the composition of alloy No. 1 shown in Table 1 was subjected to a homogenizing heat treatment and a hot rolling treatment within the scope of the present invention to control the heat generation between passes to control the product thickness. At the end of cold rolling at 120 ° C., 160 ° C. and 190 ° C. Thereafter, baking for coating was performed at a temperature of 250 ° C. for 20 seconds.
【００５９】得られたアルミニウム合金板の機械的性質
及び蓋特性について調査した。測定方法及び評価は第１
実施例と同様に行った。これらの結果を表３に示す。The mechanical properties and lid characteristics of the obtained aluminum alloy sheet were investigated. Measurement method and evaluation are first
Performed similarly to the Example. Table 3 shows the results.
【００６０】[0060]
【表３】 [Table 3]
【００６１】上記表３に示すように、本発明の範囲に入
る実施例No.６は機械的性質及び蓋特性について共に良
好な結果を得ることができた。As shown in Table 3 above, Example No. 6 falling within the scope of the present invention was able to obtain good results in both mechanical properties and lid properties.
【００６２】一方、比較例No.２０は冷間圧延終了温度
が本発明の範囲未満であるため、回復が不十分であり、
組織にバラツキが生じリベット性が劣った。On the other hand, in Comparative Example No. 20, since the cold rolling end temperature was lower than the range of the present invention, the recovery was insufficient.
Variations in the structure were observed and the rivet properties were poor.
【００６３】比較例No.２１は冷間圧延終了温度が本発
明の範囲を超えているため、回復が進みすぎて強度が低
下し、開蓋性が劣った。In Comparative Example No. 21, since the cold-rolling end temperature was beyond the range of the present invention, the recovery was too advanced, the strength was reduced, and the lid opening property was poor.
【００６４】第４実施例 表１に示す合金No.１の組成を有するアルミニウム合金
材を本発明の範囲内で均質化熱処理をし、熱間圧延処理
での熱間圧延終了板厚を変化させた。その後、冷間圧延
を連続的に行い、冷間圧延終了温度を１６０℃で板厚を
０．２５ｍｍとした。その後、塗装を想定したベーキン
グを２５０℃の温度で２０秒間行った。 Fourth Embodiment An aluminum alloy material having the composition of alloy No. 1 shown in Table 1 was subjected to a homogenizing heat treatment within the scope of the present invention to change the thickness of the hot-rolled steel sheet after hot rolling. Was. Thereafter, cold rolling was continuously performed, the cold rolling end temperature was 160 ° C., and the sheet thickness was 0.25 mm. Thereafter, baking for coating was performed at a temperature of 250 ° C. for 20 seconds.
【００６５】得られたアルミニウム合金板の機械的性質
及び蓋特性について調査した。測定方法及び評価は第１
実施例と同様に行った。これらの結果を表４に示す。The mechanical properties and lid characteristics of the obtained aluminum alloy sheet were investigated. Measurement method and evaluation are first
Performed similarly to the Example. Table 4 shows the results.
【００６６】[0066]
【表４】 [Table 4]
【００６７】上記表４に示すように、本発明の範囲に入
る実施例No.７は機械的性質及び蓋特性について共に良
好な結果を得ることができた。一方、比較例No.２２は
熱間圧延終了板厚が本発明の範囲未満であるため、０−
１８０°方向耳が発生すると共に、開蓋性が劣った。As shown in Table 4 above, Example No. 7 falling within the scope of the present invention was able to obtain good results in both mechanical properties and lid properties. On the other hand, in Comparative Example No. 22, since the thickness of the hot-rolled sheet was less than the range of the present invention, 0-
A 180 ° ear was generated and the openability was poor.
【００６８】比較例No.２３は熱間圧延終了板厚が本発
明の範囲を超えているため、未再結晶粒が残存しリベッ
ト性及び耐衝撃性が劣った。In Comparative Example No. 23, since the hot-rolled sheet thickness exceeded the range of the present invention, unrecrystallized grains remained, and rivet properties and impact resistance were poor.
【００６９】[0069]
【発明の効果】以上詳述したように本発明においては、
所定の強度、成形性及び開蓋性等の蓋材の要求特性を満
足しつつ、Ｍｇの含有量を低くすることができる。As described in detail above, in the present invention,
The content of Mg can be reduced while satisfying the required properties of the cover material such as predetermined strength, formability, and openability.
【００７０】また、環境問題にも対応することができる
と共に、工程の簡略化及び冷間圧延のパス回数を低減す
るとができるため、コストメリットのあるアルミニウム
合金板を提供することができる。In addition, it is possible to cope with environmental problems, and it is possible to simplify the process and reduce the number of passes of the cold rolling, so that an aluminum alloy plate having a cost advantage can be provided.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ２２Ｆ 1/00 ６７３ Ｃ２２Ｆ 1/00 ６７３ ６８３ ６８３ ６８４ ６８４ ６９４ ６９４Ｂ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C22F 1/00 673 C22F 1/00 673 683 683 684 684 694 694B
Claims (2)
０．２５乃至０．４８重量％及びＦｅ：０．２５乃至
０．５０重量％を含有し、更にＣｕ：０．０２乃至０．
１５重量％、Ｓｉ：０．０５乃至０．３０重量％、Ｚ
ｎ：０．０３乃至０．５０重量％及びＣｒ：０．０２乃
至０．３０重量％からなる群から選択された少なくとも
１種を含有すると共に、残部がＡｌ及び不可避的不純物
からなることを特徴とするアルミニウム合金板。1. Mg: 1.2 to 1.9% by weight, Mn:
It contains 0.25 to 0.48% by weight and Fe: 0.25 to 0.50% by weight, and further contains Cu: 0.02 to 0.5%.
15% by weight, Si: 0.05 to 0.30% by weight, Z
n: at least one selected from the group consisting of 0.03 to 0.50% by weight and Cr: 0.02 to 0.30% by weight, with the balance being Al and unavoidable impurities. Aluminum alloy plate.
０．２５乃至０．４８重量％及びＦｅ：０．２５乃至
０．５０重量％を含有し、更にＣｕ：０．０２乃至０．
１５重量％、Ｓｉ：０．０５乃至０．３０重量％、Ｚ
ｎ：０．０３乃至０．５０重量％及びＣｒ：０．０２乃
至０．３０重量％からなる群から選択された少なくとも
１種を含有すると共に、残部がＡｌ及び不可避的不純物
からなる組成を有する合金材に均質化熱処理を行う工程
と、熱間圧延終了板厚が２．０乃至３．０ｍｍ、熱間圧
延終了温度が２９０乃至３６０℃で組織が再結晶組織と
なるように熱間圧延を行う工程と、冷間圧延終了温度が
１４０乃至１８０℃となるように冷間圧延を行う工程
と、を有することを特徴とするアルミニウム合金板の製
造方法。2. Mg: 1.2 to 1.9% by weight, Mn:
It contains 0.25 to 0.48% by weight and Fe: 0.25 to 0.50% by weight, and further contains Cu: 0.02 to 0.5%.
15% by weight, Si: 0.05 to 0.30% by weight, Z
n: at least one selected from the group consisting of 0.03 to 0.50% by weight and Cr: 0.02 to 0.30% by weight, with the balance being Al and unavoidable impurities. A step of performing a homogenizing heat treatment on the alloy material, and performing hot rolling so that the hot-rolled end plate thickness is 2.0 to 3.0 mm, the hot-rolling end temperature is 290 to 360 ° C, and the structure is a recrystallized structure. And a step of performing cold rolling so that the cold-rolling end temperature is 140 to 180 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11170269A JP2000355723A (en) | 1999-06-16 | 1999-06-16 | Aluminum alloy sheet and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11170269A JP2000355723A (en) | 1999-06-16 | 1999-06-16 | Aluminum alloy sheet and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000355723A true JP2000355723A (en) | 2000-12-26 |
Family
ID=15901816
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11170269A Pending JP2000355723A (en) | 1999-06-16 | 1999-06-16 | Aluminum alloy sheet and its production |
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| JP (1) | JP2000355723A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005179758A (en) * | 2003-12-22 | 2005-07-07 | Sumitomo Light Metal Ind Ltd | Aluminum alloy hard sheet for can end having excellent cold rolling property and anisotropy, and its production method |
| WO2015041021A1 (en) * | 2013-09-20 | 2015-03-26 | 株式会社神戸製鋼所 | Aluminum alloy sheet for negative-pressure can lid |
| JP2015059250A (en) * | 2013-09-19 | 2015-03-30 | 株式会社神戸製鋼所 | Aluminum alloy sheet for negative-pressure can lid |
| JP2016029218A (en) * | 2015-10-05 | 2016-03-03 | 株式会社神戸製鋼所 | Method for producing aluminum alloy sheet for can barrel |
| JP2016041852A (en) * | 2015-10-05 | 2016-03-31 | 株式会社神戸製鋼所 | Aluminum alloy sheet for can barrel |
-
1999
- 1999-06-16 JP JP11170269A patent/JP2000355723A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005179758A (en) * | 2003-12-22 | 2005-07-07 | Sumitomo Light Metal Ind Ltd | Aluminum alloy hard sheet for can end having excellent cold rolling property and anisotropy, and its production method |
| JP4599057B2 (en) * | 2003-12-22 | 2010-12-15 | 住友軽金属工業株式会社 | Aluminum alloy hard plate for can end having excellent cold rollability and anisotropy and method for producing the same |
| JP2015059250A (en) * | 2013-09-19 | 2015-03-30 | 株式会社神戸製鋼所 | Aluminum alloy sheet for negative-pressure can lid |
| WO2015041021A1 (en) * | 2013-09-20 | 2015-03-26 | 株式会社神戸製鋼所 | Aluminum alloy sheet for negative-pressure can lid |
| JP2015059251A (en) * | 2013-09-20 | 2015-03-30 | 株式会社神戸製鋼所 | Aluminum alloy sheet for negative-pressure can lid |
| JP2016029218A (en) * | 2015-10-05 | 2016-03-03 | 株式会社神戸製鋼所 | Method for producing aluminum alloy sheet for can barrel |
| JP2016041852A (en) * | 2015-10-05 | 2016-03-31 | 株式会社神戸製鋼所 | Aluminum alloy sheet for can barrel |
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