PRODUCTION METHOD FOR ALUMINUM ALLOY FEEDSTOCK, PRODUCTION METHOD FOR ALUMINUM ALLOY INGOT, PRODUCTION METHOD FOR ALUMINUM ALLOY SHEET, PRODUCTION METHOD FOR ALUMINUM ALLOY SUBSTRATE FOR PLATING, PRODUCTION METHOD FOR ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISK, PRODUCTION METHOD FOR MAGNETIC DISK, AND MAGNETIC DISK

WIPO Patent Application WO/2023/167219

A1

The present invention relates to a production method for an aluminum alloy feedstock that involves a separation step in which an aluminum alloy material that is at least partially recycled material that is an intermediate material and/or a finished product that includes an aluminum alloy disk and a base layer is heated to separate the aluminum alloy disk and the base layer. During the separation step, the aluminum alloy material that includes the recycled material is heated to 480°C–590°C and held at that temperature for more than 1 hour.

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KITAWAKI KOTARO (JP)
KOKUBUN YUMA (JP)
SAKAMOTO RYO (JP)
HATAKEYAMA HIDEYUKI (JP)

PCT/JP2023/007476

September 07, 2023

March 01, 2023

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UACJ CORP (JP)
FURUKAWA ELECTRIC CO LTD (JP)

B22D21/04; C22B21/00; C22B1/00; C22B7/00; C22C21/00; C22F1/00; C22F1/04; C23C18/32

JP2020153011A	2020-09-24
JP2002275568A	2002-09-25
CN113897487A	2022-01-07
JPH0885830A	1996-04-02

EINSEL Felix-Reinhard et al. (JP)

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