JP3326748B2 - Manufacturing method of aluminum foil - Google Patents
Manufacturing method of aluminum foilInfo
- Publication number
- JP3326748B2 JP3326748B2 JP17378090A JP17378090A JP3326748B2 JP 3326748 B2 JP3326748 B2 JP 3326748B2 JP 17378090 A JP17378090 A JP 17378090A JP 17378090 A JP17378090 A JP 17378090A JP 3326748 B2 JP3326748 B2 JP 3326748B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum foil
- aluminum
- cold rolling
- thickness
- intermediate annealing
- 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 - Fee Related
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims description 70
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 65
- 239000011888 foil Substances 0.000 title claims description 35
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000005097 cold rolling Methods 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 22
- 238000000137 annealing Methods 0.000 claims description 19
- 239000012535 impurity Substances 0.000 claims description 6
- 238000005098 hot rolling Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 description 15
- 150000001875 compounds Chemical class 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Description
本発明は、冷間圧延時における破断を防止して、厚さ
の薄いアルミニウム箔を良好に製造しうるアルミニウム
箔の製造方法に関するものである。The present invention relates to a method for manufacturing an aluminum foil capable of preventing breakage during cold rolling and favorably manufacturing a thin aluminum foil.
従来より、アルミニウム箔を製造する方法としては、
一般的に以下に示す如き（ａ）〜（ｇ）の工程を経て製
造されている。即ち、（ａ）JIS H 4160 IN30で規定さ
れる化学組成のアルミニウム鋳塊（Si＋Fe＝0.7％以下,
Cu＝0.1％以下,Mn＝0.05％以下,Mg−0.05％以下,Zn＝0.
05％以下,Al＝99.30％以上，その他不可避不純物よりな
るもの。但し、％はすべて重量％を示している。）を準
備する、（ｂ）この鋳塊を面削する、（ｃ）面削後、45
0〜600℃の温度に加熱して均質化処理する、（ｄ）均質
化処理後、熱間圧延して３〜7mmの熱間圧延材を得る、
（ｅ）熱間圧延材を冷間圧延して厚さ0.5〜2mmのアルミ
ニウム板を得る、（ｆ）アルミニウム板を保持温度300
〜400℃、保持時間３〜20時間の条件で中間焼鈍する、
（ｇ）中間焼鈍後、冷間圧延を繰り返しして厚さ0.2mm
以下のアルミニウム箔を得るというものである。 しかしながら、上記の方法で冷間圧延を繰り返し、得
られるアルミニウム箔の厚さを薄くしようとすると、冷
間圧延時に材料が破断してしまうという欠点があった。Conventionally, as a method of manufacturing aluminum foil,
It is generally manufactured through the following steps (a) to (g). That is, (a) an aluminum ingot having a chemical composition specified by JIS H 4160 IN30 (Si + Fe = 0.7% or less,
Cu = 0.1% or less, Mn = 0.05% or less, Mg-0.05% or less, Zn = 0.
05% or less, Al = 99.30% or more, and other inevitable impurities. However, all percentages are by weight. ), (B) chamfering the ingot, (c) after chamfering,
Heating to a temperature of 0 to 600 ° C. for homogenization; (d) after homogenization, hot rolling to obtain a hot-rolled material of 3 to 7 mm;
(E) cold-rolling a hot-rolled material to obtain an aluminum plate having a thickness of 0.5 to 2 mm;
Intermediate annealing under conditions of ~ 400 ° C and holding time of 3-20 hours,
(G) After intermediate annealing, cold rolling is repeated to obtain a thickness of 0.2 mm.
The following aluminum foil is obtained. However, when the cold rolling is repeated by the above method to reduce the thickness of the obtained aluminum foil, there is a disadvantage that the material is broken during the cold rolling.
このため、本発明者は、上記の欠点の原因を究明した
ところ、冷間圧延を繰り返していると、材料が加工硬
化すること、材料自体の引張強度が低いこと、即ちJI
S H 4160 IN30で規定される化学組成のアルミニウム箔
は引張強度が低いこと、材料にピンホールが発生しや
すいこと等が主たる原因であることが判明した。 そこで、本発明者は、ある特定の組成を持つアルミニ
ウム鋳塊を使用し、且つある特定の条件で中間焼鈍する
ことによって、冷間圧延を繰り返しても加工硬化しにく
く、また材料自体の引張強度も高くなるようにして、冷
間圧延時に材料が破断するのを防止し、もって厚さの薄
いアルミニウム箔が良好に得られるようにしたものであ
る。For this reason, the present inventor investigated the cause of the above-mentioned drawbacks, and found that when cold rolling was repeated, the material was work-hardened, and the tensile strength of the material itself was low, that is, JI
It has been found that aluminum foil having a chemical composition specified by SH 4160 IN30 is mainly due to low tensile strength and easy occurrence of pinholes in the material. Therefore, the present inventor, by using an aluminum ingot having a specific composition, and by performing intermediate annealing under certain conditions, hardly work-hardened even if cold rolling is repeated, and the tensile strength of the material itself To prevent the material from breaking at the time of cold rolling, so that a thin aluminum foil can be favorably obtained.
即ち、本発明は、Fe0.8〜1.8％,Al98.0〜99.1％，そ
の他不純物よりなるアルミニウム鋳塊（但し、合金成分
としてTiは含有されていない。）を、面削、均質化処理
及び熱間圧延して、所定厚の熱間圧延材を得、次いで冷
間圧延して厚さ0.8〜1.6mmのアルミニウム板を得た後、
昇温速度50℃／分以上，保持温度350〜530℃及び保持時
間３〜60分で中間焼鈍し、その後更に冷間圧延して厚さ
６〜20μｍとすることを特徴とするアルミニウム箔の製
造方法に関するものである。 まず、本発明においては、Fe0.8〜1.8％,Al98.0〜99.
1％，その他不純物よりなるアルミニウム鋳塊を準備す
る。ここで、％はすべて重量％を表している。このアル
ミニウム鋳塊は、従来のアルミニウム鋳塊に比べて、Fe
の含有量が比較的高いものである。Feの含有量が0.8％
未満になると、Fe−Al間で形成される微細化合物の量が
少なくなって、引張強度が向上しにくくなり、冷間圧延
時にアルミニウム箔が破断しやすくなるので、好ましく
ない。また、Feの含有量が1.8％を超えると、Fe−Al間
で形成される微細化合物の量が多くなって、延性が低下
し、冷間圧延時にアルミニウム箔が破断しやすくなるの
で、好ましくない。なお、このアルミニウム鋳塊中に存
在する不純物としては、Si,Cu,Mn,Mg,Zn等である。ま
た、アルミニウム鋳塊中に合金成分として、Tiが含有さ
れていないことは、言うまでもない。 次に、このアルミニウム鋳塊を、従来公知の方法で面
削及び均質化処理する。そして、更に熱間圧延して所定
の厚さの熱間圧延材を得る。この熱間圧延材の厚さは３
〜6mm程度にするのが好ましい。熱間圧延材の厚さが3mm
未満であると、冷間圧延における加工率が低下し、引張
強度の高いアルミニウム箔が得られにくくなる傾向が生
じる。また、熱間圧延材の厚さが6mmを超えると、冷間
圧延における加工率が高くなり、冷間圧延時においてア
ルミニウム箔が破断する傾向が生じる。 その後、熱間圧延材を冷間圧延し、厚さ0.8〜1.6mmの
アルミニウム板を得る。この冷間圧延は、従来公知の方
法で行われる。アルミニウム板の厚さが0.8mm未満にな
るまで冷間圧延すると、中間焼鈍後の冷間圧延における
加工率が低くなって、引張強度の高いアルミニウム箔が
得られにくくなるので、好ましくない。また、アルミニ
ウム板の厚さが1.6mmを超える程度にしておくと、中間
焼鈍後に行う冷間圧延の加工率が高くなり、中間焼鈍後
の冷間圧延でアルミニウム箔が破断しやすくなるので、
好ましくない。 冷間圧延して厚さ0.8〜1.6mmのアルミニウム板を得た
後、中間焼鈍を行う。本発明において、この中間焼鈍の
条件を以下のとおり設定する。即ち、アルミニウム板の
昇温速度を50℃／分以上とし、アルミニウム板の保持温
度を350〜530℃とし、且つこの保持温度での保持時間を
３〜60分とする。昇温速度が50℃／分未満であると、Fe
−Al間で微細化合物が得られにくくなって、引張強度が
低下し、中間焼鈍後の冷間圧延でアルミニウム箔が破断
しやすくなるので、好ましくない。アルミニウム板の保
持温度が350℃未満であると、アルミニウム板の軟化の
程度が低く、中間焼鈍後の冷間圧延において、アルミニ
ウム箔が破断しやすくなったり、或いは得られるアルミ
ニウム箔の延性が低くなるので、好ましくない。また、
保持温度が530℃を超えると、アルミニウム板の軟化の
程度が高く、且つFe−Al間で形成される化合物が粗大化
しやすくなり、中間焼鈍後の冷間圧延でアルミニウム箔
が破断しやすくなるので、好ましくない。更に、保持時
間を３分未満とした場合は、Fe−Al間で微細化合物が得
られにくくなって、引張強度が低下し、中間焼鈍後の冷
間圧延でアルミニウム箔が破断しやすくなるので、好ま
しくない。また、保持時間が60分を超えても、特にアル
ミニウム箔の物性面での支障は来さないが、製造時間が
長くなり、合理的ではない。 以上の条件で中間焼鈍を行って、アルミニウムを軟化
させ、更に冷間圧延を繰り返す。この冷間圧延は、従来
公知の方法で行うことができる。そして、所望の厚さの
アルミニウム箔を得ることができるのである。この際、
最終製品であるアルミニウム箔の厚さは６〜20μｍとす
る。即ち、本発明に係る方法は、厚さの薄いアルミニウ
ム箔を良好に得る方法であり、６〜20μｍのアルミニウ
ム箔を得るのに適した方法なのである。このように、厚
さの薄いアルミニウム箔は、プレススルーパックの蓋材
として、或いは各種包装材の素材等として好適に使用し
うるものである。That is, according to the present invention, an aluminum ingot (containing no Ti as an alloy component) consisting of 0.8 to 1.8% of Fe, 98.0 to 99.1% of Al, and other impurities is subjected to face milling, homogenizing treatment, and the like. After hot rolling, to obtain a hot-rolled material of a predetermined thickness, and then cold-rolled to obtain an aluminum plate having a thickness of 0.8 to 1.6 mm,
Manufacture of an aluminum foil characterized by being subjected to intermediate annealing at a heating rate of 50 ° C./min or more, a holding temperature of 350 to 530 ° C. and a holding time of 3 to 60 minutes, and then further cold-rolled to a thickness of 6 to 20 μm. It is about the method. First, in the present invention, Fe 0.8 to 1.8%, Al 98.0 to 99.
Prepare an aluminum ingot consisting of 1% and other impurities. Here, all percentages represent weight%. This aluminum ingot has a higher Fe content than conventional aluminum ingots.
Is relatively high. Fe content 0.8%
If it is less than the above, the amount of the fine compound formed between Fe and Al becomes small, and it becomes difficult to improve the tensile strength, and the aluminum foil is easily broken during cold rolling, which is not preferable. Further, when the content of Fe exceeds 1.8%, the amount of the fine compound formed between Fe-Al increases, the ductility decreases, and the aluminum foil is easily broken during cold rolling, which is not preferable. . The impurities present in the aluminum ingot include Si, Cu, Mn, Mg, Zn and the like. Needless to say, Ti is not contained as an alloy component in the aluminum ingot. Next, the aluminum ingot is subjected to facing and homogenization by a conventionally known method. Then, hot rolling is further performed to obtain a hot rolled material having a predetermined thickness. The thickness of this hot rolled material is 3
It is preferably about 6 mm. Hot rolled material thickness 3mm
If it is less than 1, the working ratio in cold rolling decreases, and it tends to be difficult to obtain an aluminum foil having high tensile strength. Further, when the thickness of the hot-rolled material exceeds 6 mm, the working ratio in cold rolling increases, and the aluminum foil tends to break during cold rolling. Thereafter, the hot-rolled material is cold-rolled to obtain an aluminum plate having a thickness of 0.8 to 1.6 mm. This cold rolling is performed by a conventionally known method. If cold rolling is performed until the thickness of the aluminum plate becomes less than 0.8 mm, the working ratio in cold rolling after intermediate annealing becomes low, and it becomes difficult to obtain an aluminum foil having high tensile strength, which is not preferable. Also, if the thickness of the aluminum plate is more than about 1.6 mm, the working ratio of the cold rolling performed after the intermediate annealing increases, and the aluminum foil is easily broken by the cold rolling after the intermediate annealing.
Not preferred. After cold rolling to obtain an aluminum plate having a thickness of 0.8 to 1.6 mm, intermediate annealing is performed. In the present invention, the conditions for the intermediate annealing are set as follows. That is, the temperature rising rate of the aluminum plate is set to 50 ° C./min or more, the holding temperature of the aluminum plate is set to 350 to 530 ° C., and the holding time at this holding temperature is set to 3 to 60 minutes. If the heating rate is less than 50 ° C / min, Fe
This is not preferable because it becomes difficult to obtain a fine compound between -Al and the tensile strength is reduced, and the aluminum foil is easily broken by cold rolling after intermediate annealing. When the holding temperature of the aluminum plate is less than 350 ° C., the degree of softening of the aluminum plate is low, and in cold rolling after intermediate annealing, the aluminum foil is easily broken or the ductility of the obtained aluminum foil is reduced. It is not preferable. Also,
When the holding temperature exceeds 530 ° C., the degree of softening of the aluminum plate is high, and the compound formed between Fe and Al is easily coarsened, and the aluminum foil is easily broken by cold rolling after intermediate annealing. Is not preferred. Furthermore, if the holding time is less than 3 minutes, it becomes difficult to obtain a fine compound between Fe-Al, the tensile strength is reduced, and the aluminum foil is easily broken by cold rolling after intermediate annealing. Not preferred. Further, if the holding time exceeds 60 minutes, there is no particular problem in the physical properties of the aluminum foil, but the production time is long, which is not reasonable. Intermediate annealing is performed under the above conditions to soften the aluminum, and then cold rolling is repeated. This cold rolling can be performed by a conventionally known method. Then, an aluminum foil having a desired thickness can be obtained. On this occasion,
The thickness of the final product aluminum foil is 6 to 20 μm. That is, the method according to the present invention is a method for favorably obtaining an aluminum foil having a small thickness, and is a method suitable for obtaining an aluminum foil having a thickness of 6 to 20 μm. Thus, the thin aluminum foil can be suitably used as a cover material of a press-through pack or as a material of various packaging materials.
第１表に示したFe含有量を持つアルミニウム鋳塊（Fe
以外の成分はAlであり、その他不可避不純物が若干含有
されている。）を準備した。このアルミニウム鋳塊の両
面を各々5mmずつ面削し、従来公知の方法で均質化処理
及び熱間圧延して、６厚さ6mmの熱間圧延材を得た。そ
して、この熱間圧延材を従来公知の方法で冷間圧延し、
第１表に示すアルミニウム板を得た。 このアルミニウム板を、第１表に示す条件で中間焼鈍
し、その後更に冷間圧延を繰り返し、20μ及び６μの厚
さのアルミニウム箔を得た。そして、この冷間圧延中に
おける圧延切れを観察し、その結果を第１表に示した。
更に、得られたアルミニウム箔の引張強度、伸び及びピ
ンホールの数を測定し、第１表に示した。 また、比較例として、第２表に示したFe含有量を持つ
アルミニウム鋳塊を準備し、第２表に示した条件でアル
ミニウム箔を得た。そして、実施例と同様の評価を行っ
た。 第１表及び第２表から明らかなとおり、実施例に係る
方法は、中間焼鈍後の冷間圧延時において、圧延切れが
少なく、また実施例の方法で得られたアルミニウム箔は
引張強度が高く且つ伸びも良好で、更にピンホールの少
ないものであった。従って、プレススルーパック用の蓋
材として好適に使用しうるものであった。Aluminum ingot with Fe content shown in Table 1 (Fe
The other components are Al, and some other unavoidable impurities are contained. ) Was prepared. Both surfaces of the aluminum ingot were chamfered by 5 mm each, and were homogenized and hot rolled by a conventionally known method to obtain a 6 mm thick 6 mm thick hot rolled material. Then, the hot-rolled material is cold-rolled by a conventionally known method,
An aluminum plate shown in Table 1 was obtained. This aluminum plate was subjected to intermediate annealing under the conditions shown in Table 1 and then cold rolling was repeated to obtain aluminum foils having a thickness of 20 μm and 6 μm. Then, rolling breakage during the cold rolling was observed, and the results are shown in Table 1.
Further, the tensile strength, elongation and the number of pinholes of the obtained aluminum foil were measured and are shown in Table 1. Further, as a comparative example, an aluminum ingot having the Fe content shown in Table 2 was prepared, and an aluminum foil was obtained under the conditions shown in Table 2. Then, the same evaluation as in the example was performed. As is clear from Tables 1 and 2, the method according to the example shows that the aluminum foil obtained by the method of the example has low rolling breakage during cold rolling after the intermediate annealing, and has a high tensile strength. In addition, the elongation was good and the number of pinholes was small. Therefore, it could be suitably used as a cover material for a press-through pack.
以上説明したように、本発明は所定の成分組成を持つ
アルミニウム鋳塊を用いて、熱間圧延及び冷間圧延し一
定厚のアルミニウム板を得、更に所定の条件で中間焼鈍
してアルミニウム箔を得るという方法であるため、加工
性を向上させることができ、中間焼鈍後の冷間圧延工程
において圧延切れを防止でき、比較的薄いアルミニウム
箔を良好に得ることができるという効果を奏する。ま
た、得られたアルミニウム箔は、引張強度が高く、且つ
良好な伸びを示し、更にピンホールの数も比較的少ない
ものであった。従って、本発明に係る方法で得られたア
ルミニウム箔は、プレススルーパックの蓋材として、或
いは各種包装材の素材として好適に使用しうるものであ
る。As described above, the present invention uses an aluminum ingot having a predetermined component composition, obtains an aluminum plate having a constant thickness by hot rolling and cold rolling, and further performs intermediate annealing under predetermined conditions to form an aluminum foil. Since it is a method of obtaining, it is possible to improve workability, to prevent rolling breakage in a cold rolling step after intermediate annealing, and to obtain a relatively thin aluminum foil. Further, the obtained aluminum foil had a high tensile strength, exhibited good elongation, and had relatively few pinholes. Therefore, the aluminum foil obtained by the method according to the present invention can be suitably used as a cover material of a press-through pack or as a material of various packaging materials.
Claims (1)
純物よりなるアルミニウム鋳塊（但し、合金成分として
Tiは含有されていない。）を、面削、均質化処理及び熱
間圧延して、所定厚の熱間圧延材を得、次いで冷間圧延
して厚さ0.8〜1.6mmのアルミニウム板を得た後、昇温速
度50℃／分以上，保持温度350〜530℃及び保持時間３〜
60分で中間焼鈍し、その後更に冷間圧延して厚さ６〜20
μｍとすることを特徴とするアルミニウム箔の製造方
法。1. An aluminum ingot made of 0.8 to 1.8% Fe, 98.0 to 99.1% Al, and other impurities (however,
Ti is not contained. ) Was subjected to facing, homogenizing treatment and hot rolling to obtain a hot-rolled material having a predetermined thickness, and then cold-rolling to obtain an aluminum plate having a thickness of 0.8 to 1.6 mm. ℃ / min or more, holding temperature 350 ~ 530 ℃ and holding time 3 ~
Intermediate annealing in 60 minutes, then cold rolling to a thickness of 6-20
μm, a method for producing an aluminum foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17378090A JP3326748B2 (en) | 1990-06-30 | 1990-06-30 | Manufacturing method of aluminum foil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17378090A JP3326748B2 (en) | 1990-06-30 | 1990-06-30 | Manufacturing method of aluminum foil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04173941A JPH04173941A (en) | 1992-06-22 |
| JP3326748B2 true JP3326748B2 (en) | 2002-09-24 |
Family
ID=15967016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17378090A Expired - Fee Related JP3326748B2 (en) | 1990-06-30 | 1990-06-30 | Manufacturing method of aluminum foil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3326748B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111482458B (en) * | 2019-01-29 | 2022-03-22 | 晟通科技集团有限公司 | Aluminum foil production process |
| CN113042530A (en) * | 2019-12-28 | 2021-06-29 | 杭州五星铝业有限公司 | Production method of double-sided smooth aluminum foil for lithium battery current collector |
-
1990
- 1990-06-30 JP JP17378090A patent/JP3326748B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04173941A (en) | 1992-06-22 |
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