COPPER ALLOY AND METHOD FOR PRODUCING COPPER ALLOY

Title:

COPPER ALLOY AND METHOD FOR PRODUCING COPPER ALLOY

Document Type and Number:

WIPO Patent Application WO/2012/133651

Kind Code:

A1

Abstract:

Provided is a copper alloy, which has a composition, by at%, represented by the composition formula Cu100-a-b-c(Zr,Hf)a(Cr,Ni,Mn,Ta)b(Ti,Al)c [where 2.5≦a≦4.0, 0.1＜b≦1.5, 0≦c≦0.2, (Zr,Hf) is one or two of Zr and Hf, (Cr,Ni,Mn,Ta) is one, two or more of Cr, Ni, Mn, and Ta, (Ti,Al) is one or two of Ti and Al]; has a Cu primary crystal wherein the average secondary dendrite arm interval is 2 µm or less; has a eutectic matrix having a lamellar interval of 0.2 µm or less that is formed from a quasistable Cu5(Zr,Hf) compound phase and a Cu phase; is beryllium-free; and has high strength and high conductivity, as well as good bendability. Also provided is a method for producing a copper alloy.

Inventors:

INOUE AKIHISA (JP)
NISHIYAMA NOBUYUKI (JP)
YAMAZAKI HARUKO (JP)

Application Number:

PCT/JP2012/058358

Publication Date:

October 04, 2012

Filing Date:

March 29, 2012

Export Citation:

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Assignee:

UNIV TOHOKU (JP)
INOE AKIHISA (JP)
NISHIYAMA NOBUYUKI (JP)
YAMAZAKI HARUKO (JP)

International Classes:

C22C9/00; C22C9/01; C22C9/05; C22C9/06; C22F1/08; C22F1/00

Foreign References:

JP2005029857A	2005-02-03
JPH0754079A	1995-02-28
JP2009242882A	2009-10-22
JP2008266787A	2008-11-06
JP2005281850A	2005-10-13
JP2501275B2	1996-05-29
JPH10183274A	1998-07-14
JP2005281757A	2005-10-13
JP2006299287A	2006-11-02
JP2009242814A	2009-10-22
JP2009242895A	2009-10-22

Other References: