The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2015
Filed:
Jan. 29, 2013
Kobe Steel, Ltd., Kobe-shi, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
To provide a copper alloy sheet excellent in the balance of strength and electroconductivity and excellent in the balance of strength and bending workability also. A copper alloy contains predetermined amount of Cr, Ti, and Si so as to satisfy a mass ratio of the Cr to the Ti: 1.0≦(Cr/Ti)≦30, and a mass ratio of the Cr to the Si: 3.0≦(Cr/Si)≦30, the remainder including copper and unavoidable impurities, in which 70% or more out of total amount of Cr, Ti and Si contained in the copper alloy is precipitated, a number of piece of precipitates with 300 nm or more circle equivalent diameter observed by a SEM in a region of 25 μm in the thickness direction from the surface of the copper alloy×40 μm in the cross-sectional direction in a cross section in the width direction of the copper alloy is 50 pieces or less, and an average circle equivalent diameter of precipitates with less than 300 nm circle equivalent diameter observed by a TEM on the surface of the copper alloy is 15 nm or less.