Patent ID: 9476474
Filing Date: 2016-10-25
CPC Classification: C22C,C22F,F16F,H01B

Claim Text:
1. A fine copper alloy wire formed of a filamentary material of a copper alloy containing, in percent by mass, Ni: 5.0 to 13.0%, Al: 0.6 to 3.0%, and Si: 0.3 to 1.2%, with the remainder being composed of Cu and incidental impurities, wherein Ni, Al and Si are contained in the copper alloy so as to satisfy the following relationship: wherein the fine copper alloy wire has a fibrous texture having a crystal particle diameter of a transverse section of 5 μm or less by cold wire drawing working and is provided with the tensile strength (σB) of 900 to 1300 MPa, and electrical conductivity of 10 to 22% IACS, wherein the fine copper alloy wire is formed to have a wire diameter of 0.05 to 3 mm by the cold wire drawing working, wherein the fine copper alloy wire is a precipitation hardening-type copper alloy in which a γ′ phase of Ni wherein a diffraction intensity ratio of A:B:C satisfies 1.0:1.4 to 4.0:2.8 to 5.0, when A represents a diffraction intensity of Cu (111), B represents a diffraction intensity of Cu (200), and C represents a diffraction intensity of Cu (220) according to an X-ray diffraction method in a predetermined cross section of the fine copper alloy wire, wherein the fine copper alloy wire has a proof stress ratio (σ0.2/σB) of the tensile strength relative to a 0.2% proof stress (σ0.2) of 68 to 85%, and wherein the fine copper alloy wire optionally further contains one or two or more of, in percent by mass, B: 0.001 to 0.050% P: 0.01 to 0.30% Ti: 0.1 to 0.8% Co: 0.1 to 0.8% Zn: 0.3 to 1.2% Sn: 0.1 to 1.0% and Fe: 0.01 to 1.0%.