JPS6357493B2 - - Google Patents
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- Publication number
- JPS6357493B2 JPS6357493B2 JP11048581A JP11048581A JPS6357493B2 JP S6357493 B2 JPS6357493 B2 JP S6357493B2 JP 11048581 A JP11048581 A JP 11048581A JP 11048581 A JP11048581 A JP 11048581A JP S6357493 B2 JPS6357493 B2 JP S6357493B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- rolling
- temperature
- hot
- bright
- 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
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- 229910000838 Al alloy Inorganic materials 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 21
- 238000005096 rolling process Methods 0.000 claims description 16
- 238000005098 hot rolling Methods 0.000 claims description 13
- 238000000265 homogenisation Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 229910000765 intermetallic Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 6
- 238000007743 anodising Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910015372 FeAl Inorganic materials 0.000 description 1
- 229910019018 Mg 2 Si Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005424 photoluminescence Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
Landscapes
- Heat Treatment Of Nonferrous Metals Or Alloys (AREA)
Description
この発明は、陽極酸化処理後の処理表面がきわ
めて美麗な光輝性Al合金板材の製造方法に関す
るものである。
従来、一般に、Mg：0.2〜1.2％，Cu：0.05〜
0.2％を含有し、さらに必要に応じてMn：0.05〜
0.45％を含有し、残りがAlと不可避不純物からな
る組成（以上重量％、以下％の表示は重量％を意
味する）を有するAl合金は、化学研磨によりす
ぐれた光輝性表面が得られることから、光輝性
Al合金と呼ばれ、5257，5657，および5457合金
などとして広く用いられている。
これらの光輝性Al合金は、その使用に際して、
普通板材に加工されるが、その加工は、450℃以
上の温度で均質化処理した鋳塊に対して、熱間圧
延開始温度：350〜550℃、熱間圧延終了温度：
400℃以下の条件で熱間圧延を施して熱延板材と
し、ついで必要に応じて前記熱延板材に冷間圧延
と中間焼鈍を施して冷延板材とすることによつて
行なわれている。
この結果の光輝性Al合金板材は、光輝性のほ
かに、良好な強度および成形加工性をもつことか
ら、化粧品容器、ライダーケース、万年筆のキヤ
ツプ、ホイールキヤツプ、ラジエーターグリル、
および照明灯反射板など多方面に亘つて使用され
ている。
一方、これらの光輝性Al合金板材には、表面
を硬質にして傷がつきにくくすると共に、汚れに
くくし、さらに耐食性も向上させる目的で、その
表面に陽極酸化処理を施して、透明で良質な皮膜
を形成することが行なわれている。
しかしながら、上記の従来方法によつて製造さ
れた光輝性Al合金板材においては陽極酸化処理
を施した場合、その表面にしばしば帯状、縞状、
あるいはすじ状模様が現われ、美的価値を著しく
低下させるものであつた。
そこで、本発明者等は、上述のような観点か
ら、光輝性Al合金板材に陽極酸化処理を施した
際、その表面に発生する模様を皆無とすべく研究
を行なつた結果、熱間圧延に先だつて、570℃以
上の温度で均質化処理を行なつて金属間化合物を
集合粗大化させた光輝性Al合金鋳塊に特定条件
で予備圧延を施すと、この結果の光輝性Al合金
板材は、陽極酸化処理を施しても、その表面に模
様の発生は起らないという知見を得たのである。
したがつて、この発明は上記知見にもとづいて
なされたものであつて、Mg：0.2〜1.2％，Cu：
0.05〜0.2％を含有し、さらに必要に応じてMn：
0.05〜0.45％を含有し、残りがAlと不可避不純物
からなる組成を有する光輝性Al合金鋳塊に、通
常の条件、すなわち熱間圧延開始温度：350〜550
℃、熱間圧延終了温度：400℃以下の条件で熱間
圧延を施して光輝性Al合金熱延板を製造するに
際して、前記熱間圧延に先だつて、均質化処理を
570℃以上の温度で行なつて金属間化合物を集合
粗大化させ、ついで温度：350℃以下、圧下率：
15％以上の条件で予備圧延を施すことによつて、
すぐれた陽極酸化処理表面を有する光輝性Al合
金板材を得ることに特徴を有するものである。
なお、この発明の方法において、均質化処理を
570℃以上の高温で行なうのは、鋳造組織内の
Mg2SiやFeAl3などの金属間化合物を集合粗大化
させて良好な光輝性を確保するためである。また
予備圧延条件を上述の通りに定めたのは、圧延温
度が350℃を越えても、また圧下率が15％未満で
も所望の加工ひずみを付与することができず、こ
の結果熱間仕上圧延工程における再結晶促進効果
が少なく、陽極酸化処理を施した際、その表面に
望ましくない帯状あるいはすじ状模様が現われる
ようになるのである。したがつてすぐれた光輝性
および加工性、さらに高強度を保持した状態で、
すぐれた陽極酸化処理表面を得るためには、570
℃以上の高温での均質化処理および、圧延温度：
350℃以下、圧下率：15％以上の条件での予備圧
延が必要となるのである。
また、この発明の方法におけるAl合金鋳塊の
成分組成を上記の通りに特定した理由は、まず
Mgに関して、その含有量が0.2％未満では所望の
強度と成形加工性をAl合金板材に付与すること
ができず、一方1.2％を越えて含有させると、成
形加工性がそこなわれるようになるばかりでな
く、光輝性も劣化するようになることから、0.2
〜1.2％と定めたものであり、また、Cuに関して
は、その含有量が0.05％未満では所望のすぐれた
光輝性をAl合金板材表面に確保することができ
ず、一方0.2％を越えて含有させると、表面色調
が黄色化してAl自体のもつ独特の色調が得られ
なくなることから、その含有量を0.05〜0.2％と
定めたものであり、さらにMnについては、焼鈍
時の再結晶粒の成長を抑制して加工性を向上させ
る作用をもつ成分であることから、特に一段と加
工性が要求される場合に必要に応じて含有される
成分であるが、その含有量が0.05未満では所望の
加工性向上効果が得られず、一方0.45％を越えて
含有させると、Mgの場合と同様に光輝性がそこ
なわれるようになることから、その含有量を0.05
〜0.45％と定めたのである。
つぎに、この材料の方法を実施例により比較例
と対比しながら説明する。
実施例
通常の溶解法により、それぞれ第１表に示され
る成分組成をもつたAl合金溶湯を溶製し、鋳造
して鋳塊となし、この鋳塊に同じく第１表に示さ
れる温度に24時間保持の条件で均質化処理を施し
た後、厚さ：44mm×幅：200mm×長さ：300mmの寸
法に切り出し、さらにその両面を面削して厚さ：
40mmとし、ついでこの鋳塊に同じく第１表に示さ
れる種々の条件で予備圧延をそれぞれ施し、引続
いて熱間圧延開始温度：420℃、熱間圧延終了温
度：300℃の条件で熱間圧延を施し
The present invention relates to a method for manufacturing a bright Al alloy plate material having an extremely beautiful treated surface after anodizing treatment. Conventionally, Mg: 0.2~1.2%, Cu: 0.05~
Contains 0.2%, and if necessary Mn: 0.05~
Al alloy has a composition of 0.45% and the rest is Al and unavoidable impurities (the above weight %, below % means weight %), because an excellent bright surface can be obtained by chemical polishing. , photoluminescence
It is called an Al alloy and is widely used as 5257, 5657, and 5457 alloys. When using these bright Al alloys,
It is normally processed into plate material, but the processing is performed on an ingot that has been homogenized at a temperature of 450°C or higher, hot rolling start temperature: 350 to 550°C, hot rolling end temperature:
This is carried out by hot rolling at 400° C. or lower to obtain a hot-rolled sheet material, and then, if necessary, subjecting the hot-rolled sheet material to cold rolling and intermediate annealing to form a cold-rolled sheet material. In addition to its brightness, the resulting bright Al alloy sheet material has good strength and formability, so it can be used for cosmetic containers, rider cases, fountain pen caps, wheel caps, radiator grills, etc.
It is used in a wide range of applications, including as light reflectors and lighting reflectors. On the other hand, these bright Al alloy plates have a hard surface that is hard to scratch, stain resistant, and has anodized surfaces to improve corrosion resistance, making them transparent and of high quality. Formation of a film is performed. However, when the bright Al alloy plate material manufactured by the above-mentioned conventional method is anodized, the surface often has band-like, striped, or
Otherwise, a striped pattern appeared, which significantly reduced the aesthetic value. Therefore, from the above-mentioned viewpoint, the present inventors conducted research to eliminate any patterns that occur on the surface of bright Al alloy plate materials when anodized. If a bright Al alloy ingot is subjected to homogenization treatment at a temperature of 570°C or higher to aggregate and coarsen the intermetallic compounds, and then pre-rolled under specific conditions, the resulting bright Al alloy plate material discovered that no pattern appears on the surface even if anodized. Therefore, this invention was made based on the above knowledge, and Mg: 0.2 to 1.2%, Cu:
Contains 0.05-0.2%, and further Mn as required:
A bright Al alloy ingot with a composition of 0.05 to 0.45% and the remainder consisting of Al and unavoidable impurities is subjected to normal conditions, that is, hot rolling start temperature: 350 to 550
℃, Hot rolling end temperature: When producing bright Al alloy hot rolled sheets by hot rolling under conditions of 400℃ or less, homogenization treatment is performed prior to the hot rolling.
It is carried out at a temperature of 570°C or higher to aggregate and coarsen the intermetallic compounds, and then at a temperature of 350°C or lower and a reduction rate:
By performing preliminary rolling under conditions of 15% or more,
This method is characterized by obtaining a bright Al alloy plate material having an excellent anodized surface. In addition, in the method of this invention, the homogenization treatment is
Performing at a high temperature of 570℃ or higher will damage the inside of the casting structure.
This is to ensure good brightness by aggregating and coarsening intermetallic compounds such as Mg 2 Si and FeAl 3 . In addition, the pre-rolling conditions were set as described above because even if the rolling temperature exceeds 350°C or the rolling reduction is less than 15%, the desired processing strain cannot be applied, and as a result, hot finish rolling The effect of promoting recrystallization during the process is low, and when anodizing is performed, undesirable band-like or streak-like patterns appear on the surface. Therefore, while maintaining excellent brightness and processability, as well as high strength,
570 for a good anodized surface.
Homogenization treatment at high temperatures above ℃ and rolling temperature:
Preliminary rolling is required at a temperature of 350°C or lower and a rolling reduction of 15% or higher. In addition, the reason why the composition of the Al alloy ingot in the method of this invention was specified as above is as follows.
Regarding Mg, if the Mg content is less than 0.2%, it will not be possible to impart the desired strength and formability to the Al alloy plate material, while if the Mg content exceeds 1.2%, the formability will be impaired. 0.2
Regarding Cu, if the content is less than 0.05%, the desired excellent brightness cannot be achieved on the surface of the Al alloy plate, while if the content exceeds 0.2%, If the Mn content is 0.05% to 0.2%, the surface color becomes yellow and the unique coloration of Al itself cannot be obtained. Since it is a component that suppresses growth and improves processability, it is a component that is included as necessary especially when further processability is required, but if the content is less than 0.05, it may not be possible to achieve the desired On the other hand, if the content exceeds 0.45%, the brightness will be impaired as in the case of Mg, so the content should be reduced to 0.05%.
It was set at ~0.45%. Next, the method for using this material will be explained using examples and comparing with comparative examples. Example: Molten Al alloys having the compositions shown in Table 1 are melted using a normal melting method, and cast into an ingot.The ingot is heated to a temperature also shown in Table 1 at 24 After homogenizing under the conditions of time holding, it is cut into a piece with dimensions of 44 mm thick x 200 mm wide x 300 mm long, and then both sides are faceted to obtain a thickness of:
40 mm, and then this ingot was pre-rolled under the various conditions shown in Table 1, and then hot-rolled at a hot rolling start temperature of 420°C and a hot rolling end temperature of 300°C. rolled
【表】
て板厚：３mmの熱延板材とし、さらにこの熱延板
材に通常の条件で冷間圧延を施して板厚：0.8mm
の冷延板とした後、ロール目の細かい光輝表面仕
上げ用ロールにて板厚：0.4mmとし、さらにこの
冷延板をH24相当に調質する目的で、温度：400
℃に10秒保持後、強制空冷の熱処理を施し、最終
的に化学研磨後、膜厚：5μmの陽極酸化処理を施
すことによつて、本発明Al合金板材１〜10およ
び比較Al合金板材１〜５をそれぞれ製造した。
なお、本発明Al合金板材１〜10は、いずれも
この発明の方法における均質化処理条件および予
備圧延条件で製造されたものであり、一方比較
Al合金板材１〜５は、均質化処理条件または予
備圧延条件がこの発明の範囲から外れた条件（第
１表に※印を付して表示）で製造されたものであ
る。
つぎに、この結果得られた本発明Al合金板材
１〜10および比較Al合金板材１〜５について、
引張強さ、コニカルカツプ値を測定すると共に、
その表面における帯状模様の発生状況を観測し、
さらに鏡面反射率も測定した。
なお、帯状模様の発生状況は外観で判定し、帯
状模様の認められない良好な外観を呈するものを
◎印、製品として認容される程度のごとく軽微な
帯状模様を呈するものを〇印、強度の帯状模様を
呈するものを×印で評価した。また鏡面反射率に
関しては、銀鏡の鏡面反射率を98％とし、この銀
鏡基準面に対する上記板材の鏡面反射率を測定し
た。これらの結果を第１表に合せて示した。
第１表に示される結果から、本発明Al合金板
材１〜10においては、いずれも特定条件の均質化
処理および予備圧延を施すことによつて強度およ
び加工性の低下なく、陽極酸化処理表面における
模様発生はほとんどなく、かつ鏡面反射率も高い
状態を保持しているのに対して、特定条件の均質
化処理後予備処理を施さない比較Al合金板材１，
４、および特定条件の均質化処理後予備圧延を施
してもその条件がこの発明の範囲から外れた比較
Al合金板材２，５においては模様発生が著しい
ものになつている。また、均質化処理条件がこの
発明の範囲から外れた比較Al合金板材３におい
ては、帯状模様の発生は軽微であるが、鏡面反射
率の著しく劣つたものになつている。
上述のように、この発明の方法によれば、特定
条件の均質化処理後にして、熱間圧延前の鋳塊
に、特定条件の予備圧延を施すだけで、高強度お
よび良好な加工性を有しし、かつ陽極酸化処理を
施した際その表面に帯状やすじ状などの模様発生
がない光輝性Al合金板材を製造することができ
るのである。[Table] A hot-rolled plate with a thickness of 3 mm was obtained, and this hot-rolled plate was further cold-rolled under normal conditions to obtain a plate with a thickness of 0.8 mm.
After making a cold-rolled sheet, it was rolled to a thickness of 0.4 mm with a fine-grained bright surface finishing roll, and then heated to a temperature of 400 mm in order to heat the cold-rolled sheet to H24 equivalent.
After holding the temperature at ℃ for 10 seconds, heat treatment by forced air cooling was performed, and finally, after chemical polishing, anodic oxidation treatment with a film thickness of 5 μm was performed to obtain Al alloy sheets 1 to 10 of the present invention and comparative Al alloy sheet 1. -5 were produced, respectively. Incidentally, Al alloy sheets 1 to 10 of the present invention were all manufactured under the homogenization treatment conditions and pre-rolling conditions in the method of the present invention, while the comparative
Al alloy plate materials 1 to 5 were manufactured under conditions in which the homogenization treatment conditions or pre-rolling conditions were outside the scope of the present invention (indicated by * in Table 1). Next, regarding the present invention Al alloy plates 1 to 10 and comparative Al alloy plates 1 to 5 obtained as a result,
In addition to measuring tensile strength and conical cup value,
Observing the occurrence of band-like patterns on the surface,
Furthermore, specular reflectance was also measured. In addition, the occurrence of band-like patterns is judged by the appearance, and those with a good appearance without band-like patterns are marked with ◎, those with a slight band-like pattern that is acceptable as a product are marked with ○, and those with a good appearance are marked with ○ Those exhibiting a band-like pattern were evaluated with an x mark. Regarding the specular reflectance, the specular reflectance of the silver mirror was set to 98%, and the specular reflectance of the plate material with respect to this silver mirror reference plane was measured. These results are also shown in Table 1. From the results shown in Table 1, it can be seen that Al alloy sheets 1 to 10 of the present invention can be homogenized and pre-rolled under specific conditions without deterioration in strength or workability, and the anodized surface can be improved. Comparative Al alloy sheet material 1, which was not subjected to pretreatment after homogenization treatment under specific conditions, had almost no pattern generation and maintained a high specular reflectance.
4, and a comparison where the conditions are outside the scope of this invention even if preliminary rolling is performed after homogenization under specific conditions.
In the Al alloy plates 2 and 5, the occurrence of patterns is remarkable. In addition, in Comparative Al alloy plate material 3 in which the homogenization treatment conditions were outside the scope of the present invention, the occurrence of band-like patterns was slight, but the specular reflectance was significantly inferior. As described above, according to the method of the present invention, high strength and good workability can be achieved by simply subjecting the ingot before hot rolling to preliminary rolling under specific conditions after homogenization treatment under specific conditions. This makes it possible to produce a bright Al alloy plate material that does not have patterns such as bands or stripes on its surface when it is anodized.
Claims (1)
残りがAlと不可避不純物からなる組成（以上重
量％）を有するAl合金鋳塊を、均質化処理した
後、これに熱間圧延を施してAl合金熱延板材を
製造するに際して、前記均質化処理を570℃以上
の温度で行なつて金属間化合物を集合粗大化さ
せ、さらに前記熱間圧延に先だつて、温度：350
℃以下、圧下率：15％以上の条件で予備圧延を施
すことを特徴とするすぐれた陽極酸化処理表面を
有する光輝性Al合金板材の製造方法。 ２ Mg：0.2〜1.2％，Cu：0.05〜0.2％を含有し、
さらにMn：0.05〜0.45％を含有し、残りがAlと
不可避不純物からなる組成（以上重量％）を有す
るAl合金鋳塊を、均質化処理した後、これに熱
間圧延を施してAl合金熱延板材を製造するに際
して、前記均質化処理を570℃以上の温度で行な
つて金属間化合物を集合粗大化させ、さらに前記
熱間圧延に先だつて、温度：350℃以下、圧下
率：15％以上の条件で予備圧延を施すことを特徴
とするすぐれた陽極酸化処理表面を有する光輝性
Al合金板材の製造方法。[Claims] 1 Contains Mg: 0.2 to 1.2%, Cu: 0.05 to 0.2%,
After homogenizing an Al alloy ingot having a composition (by weight%) in which the remainder is Al and unavoidable impurities, the homogenizing treatment is performed when hot rolling is performed to produce an Al alloy hot rolled sheet material. is carried out at a temperature of 570°C or higher to aggregate and coarsen the intermetallic compounds, and further, prior to the hot rolling, at a temperature of 350°C or higher.
A method for producing a bright Al alloy plate material having an excellent anodized surface, characterized by performing preliminary rolling at a temperature of 15% or lower and a rolling reduction of 15% or higher. 2 Contains Mg: 0.2 to 1.2%, Cu: 0.05 to 0.2%,
Furthermore, after homogenizing an Al alloy ingot containing 0.05 to 0.45% Mn and the remainder consisting of Al and unavoidable impurities (weight percent), it is hot rolled to heat the Al alloy. When producing a rolled sheet material, the homogenization treatment is performed at a temperature of 570°C or higher to aggregate and coarsen the intermetallic compounds, and further, prior to the hot rolling, the temperature: 350°C or lower, rolling reduction: 15%. Brightness with excellent anodized surface characterized by pre-rolling under the above conditions
Method for manufacturing Al alloy plate material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11048581A JPS5811769A (en) | 1981-07-15 | 1981-07-15 | Production of bright al alloy plate material having superior anodized surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11048581A JPS5811769A (en) | 1981-07-15 | 1981-07-15 | Production of bright al alloy plate material having superior anodized surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5811769A JPS5811769A (en) | 1983-01-22 |
| JPS6357493B2 true JPS6357493B2 (en) | 1988-11-11 |
Family
ID=14536921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11048581A Granted JPS5811769A (en) | 1981-07-15 | 1981-07-15 | Production of bright al alloy plate material having superior anodized surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5811769A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH079028Y2 (en) * | 1988-03-01 | 1995-03-06 | 金子農機株式会社 | Ventilation duct for grain dryer |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2653577B2 (en) * | 2012-04-20 | 2023-02-15 | UACJ Corporation | Method for producing an aluminum alloy sheet that exhibits excellent surface quality after anodizing |
| JP5944862B2 (en) * | 2012-08-08 | 2016-07-05 | 株式会社Uacj | Aluminum alloy plate excellent in surface quality after anodizing treatment and manufacturing method thereof |
| WO2015022734A1 (en) * | 2013-08-13 | 2015-02-19 | 日本軽金属株式会社 | Aluminum alloy plate for high-strength alumite material and method for producing same, and aluminum alloy plate having high-strength alumite coating film attached thereto |
-
1981
- 1981-07-15 JP JP11048581A patent/JPS5811769A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH079028Y2 (en) * | 1988-03-01 | 1995-03-06 | 金子農機株式会社 | Ventilation duct for grain dryer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5811769A (en) | 1983-01-22 |
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