ALUMINUM ALLOY BLANK FOR MAGNETIC DISK AND MANUFACTURING METHOD THEREFOR, MAGNETIC DISK USING ALUMINUM ALLOY BLANK FOR MAGNETIC DISK AND MANUFACTURING METHOD THEREFOR
To provide an aluminum alloy blank for magnetic disk having smooth plating surface and a manufacturing method therefor, and a magnetic disk and a manufacturing method therefor.SOLUTION: There is provided an aluminum alloy blank for magnetic disk consisting of an aluminum alloy containing Mg:3.0 to 8...
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Main Authors | , , , , |
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Format | Patent |
Language | English Japanese |
Published |
27.02.2020
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Subjects | |
Online Access | Get full text |
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Summary: | To provide an aluminum alloy blank for magnetic disk having smooth plating surface and a manufacturing method therefor, and a magnetic disk and a manufacturing method therefor.SOLUTION: There is provided an aluminum alloy blank for magnetic disk consisting of an aluminum alloy containing Mg:3.0 to 8.0 mass%(hereafter "%"), Cu:0.003 to 0.150%, Zn:0.05 to 0.60%, Cr:0.010 to 0.300%, Mn:0.001 to 0.500%, Fe:0.001 to 0.030%, Si:0.001 to 0.030%, Be:0.00001 to 0.00200%, and the balance Al with inevitable impurities, and having difference of flatness before and after a heating treatment of 300°C×1 hr. within 168 hr. from detachment after compression annealing of 2.0 μm or less, a manufacturing method therefor, and a magnetic disk using the aluminum alloy blank for magnetic disk.SELECTED DRAWING: Figure 1
【課題】めっき表面が平滑な磁気ディスク用アルミニウム合金ブランク及びその製造方法、ならびに、磁気ディスク及びその製造方法を提供する。【解決手段】Mg:3.0〜8.0mass%(以下、「%」)、Cu:0.003〜0.150%、Zn:0.05〜0.60%、Cr:0.010〜0.300%、Mn:0.001〜0.500%、Fe:0.001〜0.030%、Si:0.001〜0.030%、Be:0.00001〜0.00200%、を含有し、残部Al及び不可避的不純物からなるアルミニウム合金からなり、加圧焼鈍後の剥離から168時間以内において、300℃×1時間の加熱処理前後の平坦度の差が2.0μm以下である磁気ディスク用アルミニウム合金ブランク及びその製造方法、ならびに、当該アルミニウム合金ブランクを用いた磁気ディスク。【選択図】図1 |
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Bibliography: | Application Number: JP20180155891 |