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Patent Searching and Data


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)
Application Number:
PCT/JP2016/072027
Publication Date:
February 02, 2017
Filing Date:
July 27, 2016
Export Citation:
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Assignee:
UACJ CORP (JP)
FURUKAWA ELECTRIC CO LTD (JP)
International Classes:
C22C21/06; B21B3/00; B22D1/00; C22F1/047; G11B5/73; G11B5/84; C22F1/00
Foreign References:
JP2013023737A2013-02-04
JPH11315338A1999-11-16
JPS6254053A1987-03-09
Attorney, Agent or Firm:
KIMURA Mitsuru (JP)
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