Title:
MAGNETIC DISC ALUMINUM ALLOY SUBSTRATE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/018451
Kind Code:
A1
Abstract:
The present invention is: a magnetic disc aluminum alloy substrate characterized in being obtained from an aluminum alloy containing Mg: 4.5-10.0 mass% (written as % below), Be: 0.00001-0.00200%, Cu: 0.003-0.150%, Zn: 0.05-0.60%, Cr: 0.010-0.300%, Si: 0.060% or less, Fe: 0.060% or less, the balance being obtained from Al and unavoidable impurities, the content of Mg-based oxides being 50 ppm or less, and prior to applying plating pre-treatment, (IBe/Ibulk)×(CBe)≤0.1000% when the maximum optical emission intensity of Be in the surface depth direction using a glow discharge spectrometer is (IBe), the mean optical emission intensity of Be in the interior of the aluminum alloy base material is (Ibulk), and the Be content is (CBe)%; and a manufacturing method therefor.
Inventors:
KITAWAKI KOTARO (JP)
MURATA TAKUYA (JP)
HIBINO AKIRA (JP)
KITAMURA NAOKI (JP)
OTA HIROKI (JP)
TAKAHASHI HIDEKI (JP)
MORI TAKASHI (JP)
MURATA TAKUYA (JP)
HIBINO AKIRA (JP)
KITAMURA NAOKI (JP)
OTA HIROKI (JP)
TAKAHASHI HIDEKI (JP)
MORI TAKASHI (JP)
Application Number:
PCT/JP2016/072027
Publication Date:
February 02, 2017
Filing Date:
July 27, 2016
Export Citation:
Assignee:
UACJ CORP (JP)
FURUKAWA ELECTRIC CO LTD (JP)
FURUKAWA ELECTRIC CO LTD (JP)
International Classes:
C22C21/06; B21B3/00; B22D1/00; C22F1/047; G11B5/73; G11B5/84; C22F1/00
Foreign References:
JP2013023737A | 2013-02-04 | |||
JPH11315338A | 1999-11-16 | |||
JPS6254053A | 1987-03-09 |
Attorney, Agent or Firm:
KIMURA Mitsuru (JP)
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