JP4181596B2 - High-strength aluminum alloy plate for printing plates - Google Patents
High-strength aluminum alloy plate for printing plates Download PDFInfo
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- JP4181596B2 JP4181596B2 JP2006328078A JP2006328078A JP4181596B2 JP 4181596 B2 JP4181596 B2 JP 4181596B2 JP 2006328078 A JP2006328078 A JP 2006328078A JP 2006328078 A JP2006328078 A JP 2006328078A JP 4181596 B2 JP4181596 B2 JP 4181596B2
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- 229910000838 Al alloy Inorganic materials 0.000 title claims description 92
- 238000007639 printing Methods 0.000 title claims description 55
- 238000007788 roughening Methods 0.000 claims description 39
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- 239000012535 impurity Substances 0.000 claims description 6
- 229910000765 intermetallic Inorganic materials 0.000 description 31
- 238000000034 method Methods 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 18
- 238000005452 bending Methods 0.000 description 16
- 230000015572 biosynthetic process Effects 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 9
- 238000000265 homogenisation Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000011156 evaluation Methods 0.000 description 7
- 238000005098 hot rolling Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 229910017604 nitric acid Inorganic materials 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 5
- 229910002551 Fe-Mn Inorganic materials 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 229910018191 Al—Fe—Si Inorganic materials 0.000 description 3
- 206010016807 Fluid retention Diseases 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910018084 Al-Fe Inorganic materials 0.000 description 1
- 229910018192 Al—Fe Inorganic materials 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 241000221561 Ustilaginales Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- -1 containing this Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000010731 rolling oil Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
本発明は、印刷、特に平版印刷の支持体として使用される印刷版用高強度アルミニウム合金板に関するものである。 The present invention relates to a high-strength aluminum alloy plate for printing plates used as a support for printing, particularly lithographic printing.
一般に、オフセット印刷の支持体としては、アルミニウム又はアルミニウム合金板が使用されており、印刷版への感光膜の密着性および非画像部の保水性を高めるために、合金板表面に粗面化処理が行われている。この粗面化処理方法として、ボール研磨法若しくはブラシ研磨法等の機械的処理方法、塩酸若しくはこれを主体とする電解液若しくは硝酸を主体とする電解液を使用して合金板表面を電気化学的に粗面化する電解粗面化処理方法、又はこれらの機械的処理方法と電解粗面化処理方法とを組み合わせた処理方法がある。なお、電解粗面化により得られた粗面板は高い製版適正および印刷性能を示し、コイル材での連続処理に適している。 Generally, an aluminum or aluminum alloy plate is used as a support for offset printing, and the surface of the alloy plate is roughened to improve the adhesion of the photosensitive film to the printing plate and the water retention of the non-image area. Has been done. As this roughening treatment method, a mechanical treatment method such as a ball polishing method or a brush polishing method, hydrochloric acid, an electrolytic solution mainly containing this, or an electrolytic solution mainly containing nitric acid is used to electrochemically treat the surface of the alloy plate. There is an electrolytic surface roughening treatment method for roughening the surface, or a combination of these mechanical treatment methods and an electrolytic surface roughening treatment method. The rough surface plate obtained by the electrolytic surface roughening exhibits high plate-making appropriateness and printing performance, and is suitable for continuous processing with a coil material.
このような電解粗面化処理に適したアルミニウム合金板として、特許文献１には、Ｆｅ、Ｓｉ、Ｃｕ、Ｔｉ、ＢおよびＭｎを所定量添加したものが記載されている。この特許文献１のアルミニウム合金板においては、これらの元素を所定量添加することによって、電解粗面化面の均一性を向上させていた。
しかしながら、従来のアルミニウム合金板においては、製造過程において、合金板の表面にはＡｌ−Ｆｅ−Ｓｉ系、Ａｌ−Ｆｅ系、Ａｌ−Ｆｅ−Ｍｎ系等の金属間化合物が存在する。そして、この金属間化合物は、電解粗面化処理において、初期ピットの形成に影響し、この初期ピットの形成が不足すると、電解粗面化面の均一性が低下しやすい。また、最大長さの大きい金属間化合物が存在すると、電解粗面化面の均一性が低下しやすい。そして、従来のアルミニウム合金板においては、合金板表面に存在する金属間化合物が制御されていないため、電解粗面化面の均一性において満足できるレベルではないという問題があった。 However, in the conventional aluminum alloy plate, an intermetallic compound such as Al—Fe—Si, Al—Fe, and Al—Fe—Mn is present on the surface of the alloy plate in the manufacturing process. The intermetallic compound affects the formation of initial pits in the electrolytic surface roughening treatment. If the formation of the initial pits is insufficient, the uniformity of the electrolytic surface roughened surface tends to be lowered. In addition, when an intermetallic compound having a large maximum length is present, the uniformity of the electrolytic roughened surface tends to decrease. And in the conventional aluminum alloy plate, since the intermetallic compound which exists in the alloy plate surface is not controlled, there existed a problem that it was not the level which is satisfactory in the uniformity of an electrolytic roughening surface.
また、従来のアルミニウム合金板を支持体として使用した印刷版では、使用頻度の多い特定の品種においては、印刷版を印刷ロール（印刷機）に装着する際、印刷版の端部の折り曲げ固定部において、アルミニウム合金板自体にクラックが生じやすい。そして、このクラックを起点として、印刷版の版切れ、すなわち、印刷版が所謂くわえ切れを起こす可能性があるという問題があった。そのため、より強度に優れた印刷版用アルミニウム合金板の開発が望まれていた。 In addition, in a printing plate using a conventional aluminum alloy plate as a support, when a printing plate is mounted on a printing roll (printing machine) in a specific type that is frequently used, a bent fixing portion at the end of the printing plate In this case, cracks are likely to occur in the aluminum alloy plate itself. Then, starting from this crack, there is a problem that the printing plate may run out, that is, the printing plate may cause so-called gripping. Therefore, it has been desired to develop an aluminum alloy plate for a printing plate having higher strength.
本発明はかかる問題点に鑑みてなされたものであって、電解粗面化面の均一性に優れると共に、強度に優れた印刷版用高強度アルミニウム合金板を提供することを目的とする。 This invention is made | formed in view of this problem, Comprising: It aims at providing the high intensity | strength aluminum alloy plate for printing plates excellent in the strength while being excellent in the uniformity of the electrolytic roughening surface.
前記課題を解決するために、本発明は、Ｓｉ：０．０３質量％以上０．１５質量％以下、Ｆｅ：０．２５質量％以上０．５０質量％以下、Ｃｕ：０．００１質量％以上０．０５０質量％以下、Ｍｇ：０．０５質量％を超え０．３０質量％未満およびＭｎ：０．０５質量％を超え０．３０質量％未満を含有し、残部がＡｌと不可避的不純物からなる印刷版用高強度アルミニウム合金板であって、前記アルミニウム合金板を、２質量％塩酸中で、電流密度１２０Ａ／ｄｍ2、周波数５０Ｈｚ、温度２５℃の電解条件で電解粗面化処理した後の表面の算術平均粗さＲａが、０．３μｍ以上０．７μｍ以下である印刷版用高強度アルミニウム合金板として構成したものである。 In order to solve the above problems, the present invention provides Si: 0.03% by mass or more and 0.15% by mass or less, Fe: 0.25% by mass or more and 0.50% by mass or less, Cu: 0.001% by mass or more 0.05% by mass or less, Mg: more than 0.05% by mass and less than 0.30% by mass, and Mn: more than 0.05% by mass and less than 0.30% by mass, with the balance being Al and inevitable impurities A high-strength aluminum alloy plate for a printing plate, wherein the aluminum alloy plate is subjected to an electrolytic surface roughening treatment in 2% by mass hydrochloric acid under electrolysis conditions of a current density of 120 A / dm 2 , a frequency of 50 Hz, and a temperature of 25 ° C. The surface has an arithmetic average roughness Ra of 0.3 μm or more and 0.7 μm or less as a high-strength aluminum alloy plate for printing plates.
このように構成すれば、アルミニウム合金板が所定量のＳｉ、Ｆｅ、Ｃｕ、ＭｇおよびＭｎを含有することによって、アルミニウム合金板の表面を電解粗面化処理した際、初期ピットの形成が促進される。また、電解粗面化面を不均一にする最大長さの大きい金属間化合物の個数密度も少なくなる。さらに、Ｆｅ、Ｃｕ、Ｍｇ、Ｍｎの作用により、アルミニウム合金板の強度が向上する。そして、アルミニウム合金板の電解粗面化処理後における表面の算術平均粗さＲａが所定範囲に限定されていることにより、このアルミニウム合金板を支持体として使用した印刷版は、その電解粗面化面が印刷版として適正な表面性となる。 If comprised in this way, when the aluminum alloy plate contains predetermined amounts of Si, Fe, Cu, Mg and Mn, the formation of initial pits is promoted when the surface of the aluminum alloy plate is subjected to electrolytic surface roughening treatment. The In addition, the number density of intermetallic compounds having a large maximum length that makes the electrolytic roughened surface nonuniform is also reduced. Furthermore, the strength of the aluminum alloy plate is improved by the action of Fe, Cu, Mg, and Mn. And, the arithmetic average roughness Ra of the surface after the electrolytic surface roughening treatment of the aluminum alloy plate is limited to a predetermined range, so that the printing plate using this aluminum alloy plate as a support has its electrolytic surface roughened. The surface has an appropriate surface property as a printing plate.
本発明に係る印刷版用高強度アルミニウム合金板によれば、電解粗面化面の均一性が優れたものとなる。また、アルミニウム合金板の強度が優れたものとなり、引張強度、曲げ疲労強度が向上し、印刷版がくわえ切れを起こすことを防止できる。 According to the high-strength aluminum alloy plate for a printing plate according to the present invention, the uniformity of the electrolytic roughened surface is excellent. Further, the strength of the aluminum alloy plate becomes excellent, the tensile strength and bending fatigue strength are improved, and the printing plate can be prevented from being cut out.
まず、本発明に係る印刷版用高強度アルミニウム合金板（以下、アルミニウム合金板と称す）について説明する。
（１）アルミニウム合金板
本発明に係るアルミニウム合金板は、所定量のＳｉ、Ｆｅ、Ｃｕ、ＭｇおよびＭｎを含有し、残部がＡｌと不可避的不純物からなる。以下に、各化学成分の数値範囲の限定理由について説明する。
First, a high-strength aluminum alloy plate for printing plates according to the present invention (hereinafter referred to as an aluminum alloy plate) will be described.
(1) Aluminum alloy plate The aluminum alloy plate according to the present invention contains a predetermined amount of Si, Fe, Cu, Mg, and Mn, and the balance consists of Al and inevitable impurities. The reason for limiting the numerical range of each chemical component will be described below.
（Ｓｉ：０．０３質量％以上０．１５質量％以下）
Ｓｉは、アルミニウム合金板の表面にＡｌ−Ｆｅ−Ｓｉ系金属間化合物を析出させ、電解粗面化処理の際、アルミニウム合金板表面の初期ピットの形成を促進させる。その結果、アルミニウム合金板の電解粗面化面（以下、粗面と称す）の均一性を向上させる。Ｓｉ含有量が０．０３質量％未満では、アルミニウム合金板表面での金属間化合物の個数密度が少ないため、初期ピットの形成が不足し、粗面の均一性が劣る。また、Ｓｉ含有量が０．１５質量％を超えると、アルミニウム合金板表面での金属間化合物の個数密度が多くなりすぎて、粗面の均一性が劣る。
(Si: 0.03 mass% or more and 0.15 mass% or less)
Si precipitates an Al—Fe—Si intermetallic compound on the surface of the aluminum alloy plate, and promotes the formation of initial pits on the surface of the aluminum alloy plate during the electrolytic surface roughening treatment. As a result, the uniformity of the electrolytically roughened surface (hereinafter referred to as roughened surface) of the aluminum alloy plate is improved. When the Si content is less than 0.03% by mass, the number density of intermetallic compounds on the surface of the aluminum alloy plate is small, so that the formation of initial pits is insufficient and the uniformity of the rough surface is poor. Moreover, when Si content exceeds 0.15 mass%, the number density of the intermetallic compound in an aluminum alloy plate surface will increase too much, and the uniformity of a rough surface will be inferior.
（Ｆｅ：０．２５質量％以上０．５０質量％以下）
Ｆｅは、アルミニウム合金板の強度向上のために重要な元素である。また、Ｆｅは、アルミニウム合金板の表面にＡｌ−Ｆｅ−Ｓｉ系、Ａｌ−Ｆｅ−Ｍｎ系金属間化合物を析出させ、電解粗面化処理の際、アルミニウム合金板表面の初期ピットの形成を促進させる。その結果、アルミニウム合金板の粗面の均一性を向上させる。Ｆｅ含有量が０．２５質量％未満では、アルミニウム合金板の強度が低くなり、引張強さ、曲げ疲労強度が低下し、印刷版の支持体として使用した際にくわえ切れが発生する。さらに、アルミニウム合金板表面での金属間化合物の個数密度が少ないため、初期ピットの形成が不足し、粗面の均一性が劣る。また、Ｆｅ含有量が０．５０質量％を超えると、アルミニウム合金板表面での金属間化合物の個数密度が多くなりすぎ、また、アルミニウム合金板表面に粗大な金属間化合物が形成されて、て、粗面の均一性が劣る。
(Fe: 0.25 mass% to 0.50 mass%)
Fe is an important element for improving the strength of the aluminum alloy sheet. Fe also precipitates Al-Fe-Si and Al-Fe-Mn intermetallic compounds on the surface of the aluminum alloy plate, and promotes the formation of initial pits on the surface of the aluminum alloy plate during the electrolytic surface roughening treatment. Let As a result, the uniformity of the rough surface of the aluminum alloy plate is improved. When the Fe content is less than 0.25% by mass, the strength of the aluminum alloy plate is lowered, the tensile strength and the bending fatigue strength are lowered, and when the plate is used as a support for a printing plate, the cutting occurs. Furthermore, since the number density of the intermetallic compound on the surface of the aluminum alloy plate is small, the formation of initial pits is insufficient and the uniformity of the rough surface is poor. If the Fe content exceeds 0.50% by mass, the number density of intermetallic compounds on the aluminum alloy plate surface becomes too large, and coarse intermetallic compounds are formed on the aluminum alloy plate surface. The uniformity of the rough surface is inferior.
（Ｃｕ：０．００１質量％以上０．０５０質量％以下）
Ｃｕは、アルミニウムに固溶状態で存在し、アルミマトリックスの強度を向上させると共に、アルミマトリックスと金属間化合物の電位を調整する作用を有する。Ｃｕ含有量が０．００１質量％未満では、アルミニウム合金板の強度が低くなり、引張強さ、曲げ疲労強度が低下し、印刷版の支持体として使用した際にくわえ切れが発生する。さらに、アルミニウム合金板の電解粗面化の際に、初期ピットの形成が不足し、粗面の均一性が劣る。また、Ｃｕ含有量が０．０５０質量％を超えると、粗大なピットが多くなり、粗面の均一性が劣る。
(Cu: 0.001% by mass or more and 0.050% by mass or less)
Cu exists in a solid solution state in aluminum, and has an effect of improving the strength of the aluminum matrix and adjusting the potential of the aluminum matrix and the intermetallic compound. When the Cu content is less than 0.001% by mass, the strength of the aluminum alloy plate is lowered, the tensile strength and the bending fatigue strength are lowered, and when the plate is used as a support for a printing plate, the cutting occurs. Further, when electrolytically roughening the aluminum alloy plate, the formation of initial pits is insufficient and the uniformity of the rough surface is poor. Moreover, when Cu content exceeds 0.050 mass%, coarse pits will increase and the uniformity of a rough surface will be inferior.
（Ｍｇ：０．０５質量％を超え０．３０質量％未満）
Ｍｇは、アルミニウムに固溶状態で存在し、アルミマトリックスの強度を向上させる重要な元素である。Ｍｇ含有量が０．０５質量％以下では、アルミニウム合金板の強度が低くなり、引張強さ、曲げ疲労強度が低下し、印刷版の支持体として使用した際にくわえ切れが発生する。また、Ｍｇ含有量が０．３０質量％以上では、粗大なピットが多くなり、粗面の均一性が劣る。さらに、アルミニウム合金板表面に粗大な金属間化合物が形成されて、粗面の均一性が劣る。
(Mg: more than 0.05% by mass and less than 0.30% by mass)
Mg exists in a solid solution state in aluminum and is an important element for improving the strength of the aluminum matrix. When the Mg content is 0.05% by mass or less, the strength of the aluminum alloy plate is lowered, the tensile strength and the bending fatigue strength are lowered, and when the plate is used as a support for a printing plate, the gripping occurs. On the other hand, when the Mg content is 0.30% by mass or more, coarse pits increase and the uniformity of the rough surface is poor. Further, a coarse intermetallic compound is formed on the surface of the aluminum alloy plate, and the uniformity of the rough surface is poor.
（Ｍｎ：０．０５質量％を超え０．３０質量％未満）
Ｍｎは、アルミニウム合金板の強度向上のために重要な元素である。また、Ｍｎは、アルミニウム合金板の表面にＡｌ−Ｆｅ−Ｍｎ系金属間化合物を析出させ、電解粗面化処理の際、アルミニウム合金板表面の初期ピットの形成を促進させる。その結果、アルミニウム合金板の粗面の均一性を向上させる。Ａｌ−Ｆｅ−Ｍｎ系金属間化合物は、アルミニウム合金板の製造過程において、鋳塊製造時に形成されるいわゆる晶出物に加えて、均質化熱処理時にいわゆる析出物の形態で多く形成される。Ｍｎ含有量が０．０５質量％以下では、アルミニウム合金板の強度が低くなり、引張強さ、曲げ疲労強度が低下し、印刷版の支持体として使用した際にくわえ切れが発生する。さらに、アルミニウム合金板表面での金属間化合物の析出量が少なく、また、金属間化合物の個数密度が少ないため、初期ピットの形成が不足し、粗面の均一性が劣る。また、Ｍｎ含有量が、０．３０質量％以上では、粗大なピットが多くなり、粗面の均一性が劣る。さらに、アルミニウム合金板表面に粗大な金属間化合物が形成されて、粗面の均一性が劣る。
(Mn: more than 0.05% by mass and less than 0.30% by mass)
Mn is an important element for improving the strength of the aluminum alloy sheet. Further, Mn precipitates an Al—Fe—Mn intermetallic compound on the surface of the aluminum alloy plate, and promotes the formation of initial pits on the surface of the aluminum alloy plate during the electrolytic surface roughening treatment. As a result, the uniformity of the rough surface of the aluminum alloy plate is improved. Al-Fe-Mn intermetallic compounds are often formed in the form of so-called precipitates during the homogenization heat treatment in addition to the so-called crystallized substances formed during the production of the ingot during the production process of the aluminum alloy sheet. When the Mn content is 0.05% by mass or less, the strength of the aluminum alloy plate is lowered, the tensile strength and the bending fatigue strength are lowered, and when the plate is used as a support for a printing plate, the gripping occurs. Furthermore, since the amount of precipitation of intermetallic compounds on the surface of the aluminum alloy plate is small, and the number density of intermetallic compounds is small, the formation of initial pits is insufficient and the uniformity of the rough surface is poor. On the other hand, when the Mn content is 0.30% by mass or more, coarse pits increase and the uniformity of the rough surface is poor. Further, a coarse intermetallic compound is formed on the surface of the aluminum alloy plate, and the uniformity of the rough surface is poor.
（不可避的不純物）
不可避的不純物は、通常市販されているアルミニウム地金に含まれる不可避的不純物であれば、本発明の目的を損なうものではない。
(Inevitable impurities)
If the inevitable impurities are inevitable impurities contained in a commercially available aluminum ingot, the object of the present invention is not impaired.
また、アルミニウム合金板は、２質量％塩酸中で、電流密度１２０Ａ／ｄｍ2、周波数５０Ｈｚ、温度２５℃の電解条件で電解粗面化処理した後の表面の算術平均粗さＲａが、０．３μｍ以上０．７μｍ以下である。以下に、この特性の数値範囲の限定理由について説明する。 In addition, the aluminum alloy plate has an arithmetic average roughness Ra of 0. 0% after electrolytic surface roughening treatment in 2% by mass hydrochloric acid under electrolytic conditions of a current density of 120 A / dm 2 , a frequency of 50 Hz, and a temperature of 25 ° C. 3 μm or more and 0.7 μm or less. The reason for limiting the numerical range of this characteristic will be described below.
（算術平均粗さＲａ：０．３μｍ以上０．７μｍ以下）
算術平均粗さＲａが０．３μｍ未満であると、印刷版の感光膜の密着性が低下すると共に、印刷版の非画像部の表面の保水量が少なくなり、インク不要部のインクはじき性が劣化して、印刷品質が低下する。算術平均粗さＲａが０．７μｍを超えると、印刷版における網点面積の面内バラツキが生じやすい、印刷品質が確保される限界の印刷枚数、いわゆる耐刷性が低下する等の問題が生じやすい。
(Arithmetic mean roughness Ra: 0.3 μm or more and 0.7 μm or less)
When the arithmetic average roughness Ra is less than 0.3 μm, the adhesion of the photosensitive film of the printing plate is lowered, the water retention amount on the surface of the non-image portion of the printing plate is reduced, and the ink repellency of the ink unnecessary portion is reduced. Deteriorated and print quality decreases. When the arithmetic average roughness Ra exceeds 0.7 μm, problems such as in-plane variation of the halftone dot area in the printing plate, the limit of the number of printed sheets that ensure printing quality, so-called printing durability, and the like occur. Cheap.
なお、本発明でいう算術平均粗さＲａとは、ＪＩＳ Ｂ０６０１−１９９４により定義されるものである。
また、算術平均粗さＲａは、化学成分（Ｓｉ、Ｆｅ、Ｃｕ、ＭｇおよびＭｎ）の含有量を前記の所定範囲に限定し、以下に説明する製造方法によりアルミニウム合金板を製造することで、０．３μｍ以上０．７μｍ以下に制御することができる。
The arithmetic average roughness Ra as used in the present invention is defined by JIS B0601-1994.
In addition, the arithmetic average roughness Ra is limited to the predetermined range of the content of chemical components (Si, Fe, Cu, Mg and Mn), and an aluminum alloy plate is manufactured by the manufacturing method described below. It can be controlled to 0.3 μm or more and 0.7 μm or less.
次に、アルミニウム合金板の製造方法の一例について説明する。
（２）アルミニウム合金板の製造方法
本発明に係るアルミニウム合金板の製造方法は、例えば、鋳塊を作製する第１工程と、鋳塊を均質化熱処理する第２工程と、均質化熱処理された鋳塊からアルミニウム合金板を作製する第３工程とを含むことで構成される。しかし、アルミニウム合金板の製造方法はこれに限定されるものではなく、適宜、必要に応じて変更してもよい。
以下、各工程について説明する。
Next, an example of the manufacturing method of an aluminum alloy plate is demonstrated.
(2) Manufacturing method of aluminum alloy plate The manufacturing method of the aluminum alloy plate according to the present invention includes, for example, a first step of producing an ingot, a second step of homogenizing heat treatment of the ingot, and a homogenizing heat treatment. And a third step of producing an aluminum alloy plate from the ingot. However, the manufacturing method of an aluminum alloy plate is not limited to this, and may be changed as necessary.
Hereinafter, each step will be described.
（第１工程）
化学成分（Ｓｉ、Ｆｅ、Ｃｕ、ＭｇおよびＭｎ）の含有量を所定範囲に限定したアルミニウム合金を溶解、鋳造して鋳塊を作製する。溶解、鋳造方法としては従来公知の方法を使用する。
(First step)
An ingot is produced by melting and casting an aluminum alloy in which the content of chemical components (Si, Fe, Cu, Mg and Mn) is limited to a predetermined range. A conventionally known method is used as the melting and casting method.
（第２工程）
前記第１工程で作製された鋳塊を、所定温度で均質化熱処理する。これによって、アルミニウム合金板の表面に存在する金属間化合物の個数密度を所定範囲にすることが可能となる。なお、均質化熱処理方法については、従来公知の方法を使用する。
(Second step)
The ingot produced in the first step is subjected to a homogenization heat treatment at a predetermined temperature. As a result, the number density of intermetallic compounds existing on the surface of the aluminum alloy plate can be set within a predetermined range. As a homogenization heat treatment method, a conventionally known method is used.
均質化熱処理温度は、３８０℃以上６００℃以下であることが好ましい。
均質化熱処理温度が３８０℃未満であると、均質化熱処理が不十分であることに加えて、金属間化合物の析出量が少なく、アルミニウム合金板の表面に存在する金属間化合物の大きさが小さくなるため、粗面化処理において初期ピットの形成が促進されず、粗面化不足となってＲａが小さくなるとともに、粗面の均一性が劣りやすい。そして、均質化熱処理温度が６００℃を超えると、金属間化合物が固溶し、アルミニウム合金板の表面に存在する金属間化合物の個数密度が少なくなるため、ピットひとつひとつのサイズが大きくなりＲａが大きくなるとともに、粗面の均一性が劣りやすい。
The homogenizing heat treatment temperature is preferably 380 ° C. or higher and 600 ° C. or lower.
If the homogenization heat treatment temperature is less than 380 ° C., in addition to insufficient homogenization heat treatment, the amount of precipitation of intermetallic compounds is small, and the size of the intermetallic compounds existing on the surface of the aluminum alloy plate is small. Therefore, the formation of initial pits is not promoted in the roughening treatment, the roughening becomes insufficient, Ra becomes small, and the uniformity of the rough surface tends to be inferior. When the homogenization heat treatment temperature exceeds 600 ° C., the intermetallic compound is dissolved, and the number density of the intermetallic compound existing on the surface of the aluminum alloy plate is reduced, so that the size of each pit is increased and Ra is increased. In addition, the uniformity of the rough surface tends to be inferior.
（第３工程）
前記第２工程で均質化熱処理された鋳塊を、所定温度の圧延開始温度で熱間圧延し、さらに冷間圧延してアルミニウム合金板を作製する。これによって、アルミニウム合金板の表面に存在する金属間化合物の個数密度を所定範囲にすることが可能となる。なお、熱間圧延、冷間圧延方法については、従来公知の方法を使用する。ここで、冷間圧延率は６０〜９５％が好ましい。また、必要に応じて、熱間圧延、冷間圧延を複数回繰り返し行い、熱間圧延と冷間圧延との間に荒焼鈍を行なってもよい。
(Third step)
The ingot that has been subjected to the homogenization heat treatment in the second step is hot-rolled at a predetermined rolling start temperature, and further cold-rolled to produce an aluminum alloy sheet. As a result, the number density of intermetallic compounds existing on the surface of the aluminum alloy plate can be set within a predetermined range. In addition, about a hot rolling and a cold rolling method, a conventionally well-known method is used. Here, the cold rolling rate is preferably 60 to 95%. Moreover, if necessary, hot rolling and cold rolling may be repeated a plurality of times, and rough annealing may be performed between hot rolling and cold rolling.
熱間圧延開始温度は、３７０℃以上５３０℃未満であることが好ましい。
熱間圧延開始温度が３７０℃未満であると、圧延板中の動的再結晶が不十分であり、圧延板の結晶組織が不均一となり、粗面の均一性が劣りやすい。また、それに加えて、アルミニウム合金板の表面に存在する金属間化合物の個数密度が不足するため、初期ピットの形成が促進されず、粗面の均一性が劣りやすい。そして、熱間圧延開始温度が５３０℃以上であると、熱間圧延の各パス間において結晶粒が過剰に成長してしまい、粗面の均一性が劣りやすい。また、それに加えて、金属間化合物が固溶し、アルミニウム合金板の表面に存在する金属間化合物の個数密度が少なくなるため、初期ピットの形成が促進されず、粗面の均一性が劣りやすい。
The hot rolling start temperature is preferably 370 ° C. or higher and lower than 530 ° C.
When the hot rolling start temperature is less than 370 ° C., dynamic recrystallization in the rolled sheet is insufficient, the crystal structure of the rolled sheet becomes non-uniform, and the uniformity of the rough surface tends to be poor. In addition, since the number density of the intermetallic compound existing on the surface of the aluminum alloy plate is insufficient, the formation of initial pits is not promoted, and the uniformity of the rough surface tends to be poor. And when the hot rolling start temperature is 530 ° C. or higher, crystal grains grow excessively between the passes of hot rolling, and the uniformity of the rough surface tends to be poor. In addition, since the intermetallic compound is dissolved and the number density of the intermetallic compound existing on the surface of the aluminum alloy plate is reduced, the formation of initial pits is not promoted, and the uniformity of the rough surface tends to be poor. .
また、本発明に係るアルミニウム合金板は、前記アルミニウム合金板の表面を電気化学的に粗面化処理（電解粗面化処理）した後における表面の算術平均粗さＲａが０．３μｍ以上０．７μｍ以下であることを特徴とする。以下に、電解粗面化処理について説明する。 The aluminum alloy plate according to the present invention has an arithmetic average roughness Ra of 0.3 μm or more after the surface of the aluminum alloy plate is electrochemically roughened (electrolytic surface roughening). It is 7 μm or less. Below, an electrolytic roughening process is demonstrated.
（３）電解粗面化処理
電解粗面化処理方法は、アルミニウム合金板を、２質量％塩酸中で、電流密度１２０Ａ／ｄｍ2、周波数５０Ｈｚ、温度２５℃の電解条件で、１０秒間の電解処理する方法により行う。この条件で電解粗面化処理を行うことにより、このアルミニウム合金板を支持体として使用した印刷版は、印刷版への感光膜の密着性および非画像部の保水性が高まる等、その電解粗面化面が印刷版として適正な表面性となる。
なお、電解粗面化処理の条件は、電解粗面化面が印刷版として適正な表面性となる条件で行えばよく、適宜、必要に応じて変更を加えてもよい。
例えば、電解液としては、塩酸の代わりに、硝酸、硫酸、クエン酸、酒石酸等の水溶液を用いてもよく、必要により各種有機酸を加えることもできる。なお、交流電源としては、従来公知のものが使用されるが、正弦波の単相および三相交流等が好ましい。また、ボール研磨法若しくはブラシ研磨法等の機械的粗面化法と組み合わせて行ってもよい。
(3) Electrolytic surface roughening treatment The electrolytic surface roughening treatment method is carried out by subjecting an aluminum alloy plate to electrolysis for 10 seconds in 2% by mass hydrochloric acid under electrolysis conditions of a current density of 120 A / dm 2 , a frequency of 50 Hz, and a temperature of 25 ° C. This is done according to the processing method. By performing the electrolytic surface-roughening treatment under these conditions, the printing plate using this aluminum alloy plate as a support has its electrolytic roughing such as increased adhesion of the photosensitive film to the printing plate and water retention of the non-image area. The surface to be surface has an appropriate surface property as a printing plate.
The conditions for the electrolytic surface roughening treatment may be performed under the condition that the electrolytic surface roughened surface has an appropriate surface property as a printing plate, and may be changed as necessary.
For example, as the electrolytic solution, an aqueous solution of nitric acid, sulfuric acid, citric acid, tartaric acid or the like may be used instead of hydrochloric acid, and various organic acids may be added as necessary. A known AC power source is used as the AC power source, but a sine wave single-phase and three-phase AC are preferable. Further, it may be performed in combination with a mechanical surface roughening method such as a ball polishing method or a brush polishing method.
前記電解粗面化処理に先立ち、アルミニウム合金板に周知の前処理を行い、圧延油の除去と表面の洗浄等を行うことが好ましい。その前処理方法は、溶剤、界面活性剤および水酸化ナトリウム、水酸化カリウム等のアルカリ水溶液にアルミニム合金板を浸漬する方法等が挙げられる。ここで、アルカリ水溶液で前処理（脱脂処理）した場合には、これにより発生するスマットを硝酸、硫酸等に浸漬することにより、除去することが好ましい。 Prior to the electrolytic surface roughening treatment, it is preferable to perform a known pretreatment on the aluminum alloy plate to remove the rolling oil, clean the surface, and the like. Examples of the pretreatment method include a method of immersing an aluminum alloy plate in a solvent, a surfactant, and an alkaline aqueous solution such as sodium hydroxide or potassium hydroxide. Here, when pretreatment (degreasing treatment) with an alkaline aqueous solution, it is preferable to remove the smut generated thereby by immersing it in nitric acid, sulfuric acid or the like.
さらに、前記電解粗面化処理の後に化学的な処理を行い、電解粗面化処理で形成され表面に残存しているスマット等を取り除くことが好ましい。この化学的処理の方法としては、アルミニウムを溶解する酸、またはアルカリ水溶液に浸漬する方法等が挙げられる。ここで、アルカリ水溶液で処理した場合には、これにより発生するスマットを硝酸・硫酸等に浸漬することにより、除去することが好ましい。 Furthermore, it is preferable to perform chemical treatment after the electrolytic surface roughening treatment to remove smuts and the like that are formed by the electrolytic surface roughening treatment and remain on the surface. Examples of the chemical treatment method include a method of immersing in an acid that dissolves aluminum or an alkaline aqueous solution. Here, in the case of treatment with an alkaline aqueous solution, it is preferable to remove the smut generated thereby by immersing it in nitric acid / sulfuric acid.
本発明に係るアルミニウム合金板の実施例（実施例１〜６）について、その比較例（比較例１〜１２）と比較して具体的に説明する。 Examples (Examples 1 to 6) of the aluminum alloy plate according to the present invention will be specifically described in comparison with comparative examples (Comparative Examples 1 to 12).
＜実施例１〜６、比較例１〜１０＞
表１に示す組成を有するアルミニウム合金を溶解、鋳造して鋳塊を作製し、面削して４７０ｍｍ厚さとした。この鋳塊を４８０℃×４ｈで均質化熱処理し、圧延開始温度４２０℃で熱間圧延して厚さ３ｍｍの圧延板を作製した。この圧延板を冷間圧延して厚さ０．３ｍｍのアルミニウム合金板を作製した。
<Examples 1-6, Comparative Examples 1-10>
An aluminum alloy having the composition shown in Table 1 was melted and cast to produce an ingot, which was chamfered to a thickness of 470 mm. This ingot was subjected to homogenization heat treatment at 480 ° C. × 4 h, and hot-rolled at a rolling start temperature of 420 ° C. to produce a rolled plate having a thickness of 3 mm. This rolled plate was cold-rolled to produce an aluminum alloy plate having a thickness of 0.3 mm.
＜比較例１１、１２＞
表１に示す組成を有するアルミニウム合金を溶解、鋳造して鋳塊を作製し、面削して４７０ｍｍ厚さとした。この鋳塊を３５０℃×４ｈ（比較例１１）あるいは６３０℃×４ｈ（比較例１２）で均質化熱処理し、圧延開始温度４２０℃で熱間圧延して厚さ３ｍｍの圧延板を作製した。この圧延板を冷間圧延して厚さ０．３ｍｍのアルミニウム合金板を作製した。すなわち、製造条件を前記の条件と変えることにより、算術平均粗さＲａを変化させた。
<Comparative Examples 11 and 12>
An aluminum alloy having the composition shown in Table 1 was melted and cast to produce an ingot, which was chamfered to a thickness of 470 mm. This ingot was subjected to homogenization heat treatment at 350 ° C. × 4 h (Comparative Example 11) or 630 ° C. × 4 h (Comparative Example 12), and hot-rolled at a rolling start temperature of 420 ° C. to produce a rolled plate having a thickness of 3 mm. This rolled plate was cold-rolled to produce an aluminum alloy plate having a thickness of 0.3 mm. That is, the arithmetic average roughness Ra was changed by changing the manufacturing conditions to those described above.
次に、前記のアルミニウム合金板の表面を、以下の条件で電解粗面化処理した。
（電解粗面化処理条件）
アルミニウム合金板を、５質量％水酸化ナトリウム水溶液で、温度５０℃にて３０秒間脱脂後、１質量％硝酸で、室温にて３０秒間中和洗浄した。中和洗浄されたアルミニウム合金板を、２質量％塩酸中で、電流密度１２０Ａ／ｄｍ2 、周波数５０Ｈｚ、温度２５℃の電解条件で、１０秒間の電解処理する方法で交流電解粗面化処理した。電解粗面化処理されたアルミニウム合金板を、５質量％水酸化ナトリウム水溶液で、温度５０℃にて１０秒間デスマット処理後、３０質量％硝酸で、室温にて３０秒間中和洗浄し、水洗し、乾燥させた。これを評価試料とした。
Next, the surface of the aluminum alloy plate was subjected to an electrolytic surface roughening treatment under the following conditions.
(Electrolytic surface roughening conditions)
The aluminum alloy plate was degreased with a 5% by mass aqueous sodium hydroxide solution at a temperature of 50 ° C. for 30 seconds, and then neutralized and washed with 1% by mass nitric acid at room temperature for 30 seconds. The neutralized and washed aluminum alloy sheet was subjected to an AC electrolytic surface roughening treatment in an electrolytic condition of 2% by mass hydrochloric acid under a current density of 120 A / dm 2 , a frequency of 50 Hz, and a temperature of 25 ° C. for 10 seconds. . The aluminum alloy plate subjected to electrolytic surface roughening treatment was desmutted with a 5% by weight aqueous sodium hydroxide solution at a temperature of 50 ° C. for 10 seconds, then neutralized with 30% by weight nitric acid at room temperature for 30 seconds, and washed with water. , Dried. This was used as an evaluation sample.
次に、評価試料の粗面（電解粗面化面）の算術平均粗さＲａを測定すると共に、均一性について、以下の評価方法で評価した。その結果を表１に示す。
なお、算術平均粗さＲａは、ＪＩＳ Ｂ０６０１−１９９４に記載の方法により行った。
Next, the arithmetic average roughness Ra of the rough surface (electrolytic roughened surface) of the evaluation sample was measured, and the uniformity was evaluated by the following evaluation method. The results are shown in Table 1.
In addition, arithmetic mean roughness Ra was performed by the method as described in JIS B0601-1994.
（均一性の評価方法）
評価試料の粗面を、ＳＥＭを用いて２０００倍で表面観察を行い、これを写真撮影した。この写真を並べて全長１００ｃｍの線を平行に３本引き、この線の下にある最大のピットと最小のピットの大きさ（最大長さ）の差を求めることにより均一性を評価した。ここで、ピットの大きさの差が２μｍ以下のものを○（良好）とし、ピットの大きさの差が２μｍを超えるものを×（不良）とした。
(Evaluation method of uniformity)
The rough surface of the evaluation sample was observed at a magnification of 2000 using an SEM, and this was photographed. The photographs were placed side by side and three lines with a total length of 100 cm were drawn in parallel, and the uniformity was evaluated by determining the difference in size (maximum length) between the largest pit and the smallest pit below this line. Here, the case where the difference in the pit size was 2 μm or less was evaluated as ◯ (good), and the case where the difference in the pit size exceeded 2 μm was determined as x (defect).
次に、前記アルミニウム合金板について、以下の方法で引張強さ、および曲げ疲労強度を測定または算出した。その結果を表１に示す。 Next, the tensile strength and bending fatigue strength of the aluminum alloy plate were measured or calculated by the following method. The results are shown in Table 1.
（引張強さの評価方法）
アルミニウム合金板からＪＩＳ５号試験片（ＪＩＳＺ２２０１）を切り出しにより作製した。この試験片を用いて、ＪＩＳＺ２２４１に準じて引張試験を行い、引張強さを測定した。ここで、引張強さが２００ＭＰａ以上のものを○（良好）とし、引張強さが２００ＭＰａ未満のものを×（不良）とした。
(Tensile strength evaluation method)
A JIS No. 5 test piece (JISZ2201) was cut out from the aluminum alloy plate. Using this test piece, a tensile test was performed according to JISZ2241, and the tensile strength was measured. Here, those having a tensile strength of 200 MPa or more were evaluated as “good”, and those having a tensile strength of less than 200 MPa were evaluated as “poor”.
（曲げ疲労強度の評価方法）
アルミニウム合金板から試験片（長さ１０ｍｍ×幅８０ｍｍ）を切り出しにより作製した。この試験片を用いて、ＪＩＳＺ２２７３に準じた平面曲げ疲労試験を、試験片の厚み方向に与える片振り幅５ｍｍで行った。そして、繰返し曲げ１０4回での破断応力を算出し、この破断応力を曲げ疲労強度とした。ここで、破断応力４００ＭＰａ以上のものを○（良好）、４００ＭＰａ未満のものを×（不良）とした。この曲げ疲労強度が良好なアルミニウム合金板を用いた印刷版は、くわえ切れ性が良好である。
(Bending fatigue strength evaluation method)
A test piece (length 10 mm × width 80 mm) was cut out from the aluminum alloy plate. Using this test piece, a plane bending fatigue test according to JISZ2273 was performed with a swing width of 5 mm given in the thickness direction of the test piece. Then, the breaking stress at 10 4 repeated bendings was calculated, and this breaking stress was defined as bending fatigue strength. Here, the one having a breaking stress of 400 MPa or more was evaluated as ◯ (good) and the one having a breaking stress of less than 400 MPa was evaluated as x (defective). A printing plate using an aluminum alloy plate having good bending fatigue strength has good gripping properties.
次に、前記アルミニウム合金板を支持体として使用した印刷版について、印刷版としての表面性を調べた。その結果を表１に示す。 Next, the surface properties of the printing plate using the aluminum alloy plate as a support were examined. The results are shown in Table 1.
（印刷版の表面性の評価方法）
印刷版を汎用の印刷機に装着して、ロール状に巻き取り、印刷を行うことで、表面性を評価した。網点面積の面内バラツキ等が生じなかったもの、及びインク不要部へインクが残ってしまうような印刷品質低下が生じなかったものを○（良好）とし、網点面積の面内バラツキ等が生じたもの、インク不要部にインクが残ってしまって印刷品質が低下したものを×（不良）とした。
(Method for evaluating surface properties of printing plates)
The printing plate was mounted on a general-purpose printing machine, wound up into a roll, and printed to evaluate the surface properties. ○ (Good) indicates that there was no in-plane variation in the halftone dot area, and no deterioration in print quality that would leave ink in the ink unnecessary part. What was produced and what the printing quality fell because the ink remained in the ink unnecessary part was set as x (defect).
表１に示すように、実施例１〜６は、化学組成、電解粗面化処理後の算術平均粗さＲａが本発明の請求範囲（以下、請求範囲と称す）を満足するため、粗面の均一性、アルミニウム合金板の強度（引張強さ、曲げ疲労強度）、印刷版の表面性に優れるものであった。 As shown in Table 1, Examples 1 to 6 are rough surfaces because the chemical composition and the arithmetic average roughness Ra after the electrolytic surface-roughening treatment satisfy the claims of the present invention (hereinafter referred to as claims). Of the aluminum plate, the strength (tensile strength, bending fatigue strength) of the aluminum alloy plate, and the surface quality of the printing plate.
比較例１は、Ｓｉ含有量が請求範囲の下限値未満であるため、粗面の均一性に劣り、印刷版の表面性に劣るものであった。
比較例２は、Ｓｉ含有量が請求範囲の上限値を超えるため、粗面の均一性に劣り、印刷版の表面性に劣るものであった。
In Comparative Example 1, since the Si content was less than the lower limit of the claims, the uniformity of the rough surface was inferior and the surface property of the printing plate was inferior.
In Comparative Example 2, since the Si content exceeded the upper limit of the claims, the uniformity of the rough surface was inferior and the surface property of the printing plate was inferior.
比較例３は、Ｆｅ含有量が請求範囲の下限値未満であるため、粗面の均一性に劣り、印刷版の表面性に劣るものであった。また、強度が不足し、引張強さ、曲げ疲労強度に劣るものであった。
比較例４は、Ｆｅ含有量が請求範囲の上限値を超えるため、粗面の均一性に劣り、また、アルミニウム合金板表面に粗大な金属間化合物が形成されたことから電解粗面化処理後の算術平均粗さＲａが請求範囲の上限値を超えるため、印刷版の表面性に劣るものであった。
In Comparative Example 3, since the Fe content was less than the lower limit of the claims, the uniformity of the rough surface was inferior and the surface property of the printing plate was inferior. Further, the strength was insufficient, and the tensile strength and bending fatigue strength were inferior.
In Comparative Example 4, since the Fe content exceeds the upper limit of the claim range, the uniformity of the rough surface is inferior, and since a coarse intermetallic compound is formed on the surface of the aluminum alloy plate, after the electrolytic surface roughening treatment Since the arithmetic average roughness Ra exceeds the upper limit of the claims, the surface properties of the printing plate were inferior.
比較例５は、Ｃｕ含有量が請求範囲の下限値未満であるため、粗面の均一性に劣り、印刷版の表面性に劣るものであった。また、強度が不足し、引張強さ、曲げ疲労強度に劣るものであった。
比較例６は、Ｃｕ含有量が請求範囲の上限値を超えるため、粗面の均一性に劣り、印刷版の表面性に劣るものであった。
In Comparative Example 5, since the Cu content was less than the lower limit of the claims, the uniformity of the rough surface was inferior and the surface property of the printing plate was inferior. Further, the strength was insufficient, and the tensile strength and bending fatigue strength were inferior.
In Comparative Example 6, since the Cu content exceeded the upper limit of the claims, the uniformity of the rough surface was inferior and the surface property of the printing plate was inferior.
比較例７は、Ｍｇ含有量が請求範囲の下限値未満であるため、強度が不足し、引張強さ、曲げ疲労強度に劣るものであった。
比較例８は、Ｍｇ含有量が請求範囲の上限値を超えるため、粗面の均一性に劣り、また、アルミニウム合金板表面に粗大な金属間化合物が形成されたことから電解粗面化処理後の算術平均粗さＲａが請求範囲の上限値を超えるため、印刷版の表面性に劣るものであった。
In Comparative Example 7, since the Mg content was less than the lower limit value of the claims, the strength was insufficient, and the tensile strength and bending fatigue strength were inferior.
In Comparative Example 8, since the Mg content exceeds the upper limit of the claims, the uniformity of the rough surface is inferior, and since a rough intermetallic compound was formed on the aluminum alloy plate surface, Since the arithmetic average roughness Ra exceeds the upper limit of the claims, the surface properties of the printing plate were inferior.
比較例９は、Ｍｎ含有量が請求範囲の下限値未満であるため、粗面の均一性に劣り、印刷版の表面性に劣るものであった。また、強度が不足し、引張強さ、曲げ疲労強度に劣るものであった。
比較例１０は、Ｍｎ含有量が請求範囲の上限値を超えるため、粗面の均一性に劣り、また、アルミニウム合金板表面に粗大な金属間化合物が形成されたことから電解粗面化処理後の算術平均粗さＲａが請求範囲の上限値を超えるため、印刷版の表面性に劣るものであった。
In Comparative Example 9, since the Mn content was less than the lower limit of the claims, the uniformity of the rough surface was inferior and the surface property of the printing plate was inferior. Further, the strength was insufficient, and the tensile strength and bending fatigue strength were inferior.
In Comparative Example 10, since the Mn content exceeds the upper limit of the claims, the uniformity of the rough surface is inferior, and after the electrolytic surface roughening treatment, a coarse intermetallic compound is formed on the aluminum alloy plate surface. Since the arithmetic average roughness Ra exceeds the upper limit of the claims, the surface properties of the printing plate were inferior.
比較例１１は、電解粗面化処理後の算術平均粗さＲａが請求範囲の上限値を超えるため、また均一性にも劣るため、印刷版の表面性に劣るものであった。
比較例１２は、電解粗面化処理後の算術平均粗さＲａが請求範囲の下限値未満であるため、また均一性にも劣るため、印刷版の表面性に劣るものであった。
In Comparative Example 11, the arithmetic average roughness Ra after the electrolytic surface-roughening treatment exceeded the upper limit value of the claims, and the uniformity was inferior, so that the surface properties of the printing plate were inferior.
In Comparative Example 12, the arithmetic average roughness Ra after the electrolytic surface-roughening treatment was less than the lower limit of the claims, and the uniformity was inferior, so the surface properties of the printing plate were inferior.
Claims (1)
前記アルミニウム合金板を、２質量％塩酸中で、電流密度１２０Ａ／ｄｍ2、周波数５０Ｈｚ、温度２５℃の電解条件で電解粗面化処理した後の表面の算術平均粗さＲａが、０．３μｍ以上０．７μｍ以下であることを特徴とする印刷版用高強度アルミニウム合金板。 Si: 0.03% to 0.15% by mass, Fe: 0.25% to 0.50% by mass, Cu: 0.001% to 0.050% by mass, Mg: 0.05 A high-strength aluminum alloy plate for a printing plate containing more than 0.3% by mass and less than 0.30% by mass and Mn: more than 0.05% by mass and less than 0.30% by mass, the balance being made of Al and inevitable impurities ,
The arithmetic average roughness Ra of the surface after the aluminum alloy plate is subjected to an electrolytic surface roughening treatment in 2% by mass hydrochloric acid under electrolytic conditions of a current density of 120 A / dm 2 , a frequency of 50 Hz, and a temperature of 25 ° C. is 0.3 μm. A high-strength aluminum alloy plate for a printing plate, wherein the strength is 0.7 μm or less.
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| PCT/JP2007/073333 WO2008069180A1 (en) | 2006-12-05 | 2007-12-03 | High-strength aluminum alloy plate for printing plate |
| CN2007800422552A CN101535514B (en) | 2006-12-05 | 2007-12-03 | High-strength aluminum alloy plate for printing plate |
| KR1020097011563A KR101104556B1 (en) | 2006-12-05 | 2007-12-03 | High-strength aluminum alloy plate for printing plate |
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| JP4764459B2 (en) * | 2008-08-28 | 2011-09-07 | 株式会社神戸製鋼所 | High-strength aluminum alloy plate for printing plates with excellent reverse whitening prevention |
| KR101202998B1 (en) * | 2010-03-26 | 2012-11-20 | 토요 알루미늄 치바 가부시키가이샤 | Pure aluminum hard foil for battery collector |
| CN102500617B (en) * | 2011-11-14 | 2013-11-20 | 重庆捷和铝业有限公司 | Preparation method for high-strength PS (polystyrene) printing plate |
| KR20190042064A (en) * | 2016-09-01 | 2019-04-23 | 노벨리스 인크. | Aluminum-manganese-zinc alloy |
| CN108588499B (en) * | 2018-04-12 | 2019-12-31 | 威海海鑫新材料有限公司 | CTP printing plate-based aluminum strip and preparation process thereof |
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