Title:
ALUMINUM ALLOY SHEET FOR BATTERY CASES, AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2014/192256
Kind Code:
A1
Abstract:
Disclosed is an aluminum alloy sheet for battery cases that is made of an aluminum alloy including 0.8-2.0 mass% (referred to hereinafter as %) Fe, 0.03-0.20% Si, 0-1.00% Cu, and 0.004-0.050% Ti, with Mg being restricted to 0.02% or less, Mn being restricted to 0.02% or less, and the remainder comprising Al and inevitable impurities, wherein, in a metallographic structure up to a depth of at least 5 µm in the sheet-thickness direction from the surface of the aluminum alloy sheet having a final sheet thickness, the average circle-equivalent diameter of Al-Fe-based intermetallic compounds having circle-equivalent diameters of 1.0-16.0 µm is 1.3-1.9 µm, the coefficient of variation of said circle-equivalent diameters is 0.55 or less, the average number density of said Al-Fe-based intermetallic compounds is 20-150 pieces/2500 µm2, and the coefficient of variation of said number density is 0.30 or less. Also disclosed is a method for producing said aluminum alloy sheet. Accordingly, the present invention provides: an aluminum alloy sheet for battery cases that has excellent laser weldability, formability, and corrosion resistance after long-term storage; and a method for producing said aluminum alloy sheet.
Inventors:
OSUGA HIROTAKE (JP)
ATSUTA KEN (JP)
SUZUKI YOSHIKAZU (JP)
ATSUTA KEN (JP)
SUZUKI YOSHIKAZU (JP)
Application Number:
PCT/JP2014/002671
Publication Date:
December 04, 2014
Filing Date:
May 21, 2014
Export Citation:
Assignee:
UACJ CORP (JP)
International Classes:
C22C21/00; B21B3/00; B22D11/00; B22D11/049; B22D11/22; C22C21/12; C22F1/04; H01M50/119; H01M50/133; C22F1/00
Domestic Patent References:
| WO2013008314A1 | 2013-01-17 |
Foreign References:
| JP2014031531A | 2014-02-20 | |||
| JP2009052126A | 2009-03-12 | |||
| JP2008127656A | 2008-06-05 | |||
| JP2013014836A | 2013-01-24 |
Other References:
JAPAN ALUMINIUM ASSOCIATION, GENBA DE IKASU KINZOKU ZAIRYO SERIES ALUMINIUM, 9 November 2007 (2007-11-09), pages 196
ALUMINIUM KAKO GIJUTSU BINRAN HENSHU IINKAI, ALUMINIUM KAKO GIJUTSU BINRAN, 5 March 1970 (1970-03-05), pages 115
ALUMINIUM KAKO GIJUTSU BINRAN HENSHU IINKAI, ALUMINIUM KAKO GIJUTSU BINRAN, 5 March 1970 (1970-03-05), pages 115
Attorney, Agent or Firm:
INOUE, TOSHIO (JP)
Toshio Inoue (JP)
Toshio Inoue (JP)
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