Aluminum alloy disk blank for magnetic disk and magnetic disk

Aluminum alloy disk blank for magnetic disk and magnetic disk

The present invention relates to an aluminum alloy disc blank for a magnetic disk, which is characterized by being formed from an aluminum alloy containing 0.005-1.800 mass% of Fe, the remainder comprising Al and unavoidable impurities, and by having a change in flatness of 2.0 [mu] m or less when t...

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Hauptverfasser: HATAKEYAMA HIDEYUKI, NAKAMURA TOSHIHIRO, YAMADA RYOUHEI, KITAWAKI KOTARO, SAKAMOTO RYO, KUMAGAI WATARU, TODO SHINPEI
Format: Patent
Sprache:chi ; eng
Schlagworte:
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator HATAKEYAMA HIDEYUKI
NAKAMURA TOSHIHIRO
YAMADA RYOUHEI
KITAWAKI KOTARO
SAKAMOTO RYO
KUMAGAI WATARU
TODO SHINPEI
description The present invention relates to an aluminum alloy disc blank for a magnetic disk, which is characterized by being formed from an aluminum alloy containing 0.005-1.800 mass% of Fe, the remainder comprising Al and unavoidable impurities, and by having a change in flatness of 2.0 [mu] m or less when the aluminum alloy disc blank for a magnetic disk is held in the atmosphere at 50 DEG C or less for 336 hours. 本发明涉及一种磁盘用铝合金盘坯，其特征在于，其由铝合金形成，所述铝合金含有Fe：0.005～1.800质量％，余量由Al和不可避免的杂质构成，在大气中将磁盘用铝合金盘坯在50℃以下保持336小时时的磁盘用铝合金盘坯的平坦度变化为2.0μm以下。
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language chi ; eng
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subjects ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title Aluminum alloy disk blank for magnetic disk and magnetic disk
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