| 摘要 |
PROBLEM TO BE SOLVED: To provide an extra-fine Cu-Ag alloy wire having high strength, high toughness and high electric conductivity, and to provide a method for producing the same. SOLUTION: A Cu-Ag alloy stock containing 2.0 to 15.0 mass% Ag (the one obtained by performing cold working to a cast material) is subjected to intermediate heat treatment. The heat-treated material is subjected to final cold working at a working degree: In(A/A<SB>0</SB>)=1 to 10, and is thereafter subjected to final heat treatment (softening treatment). Both the intermediate heat treatment and final heat treatment are performed in such a manner that the elongation of the wire rod after the heat treatment reaches≥10%. By performing the cold working under specified conditions before the final heat treatment, the Cu-Ag alloy wire having high elongation and excellent fatigue resistance can be obtained. The Cu-Ag alloy wire has a wire diameter of≤0.1 mm, tensile strength of≥290 MPa, elongation of≥10% and electric conductivity of≥80% IACS. COPYRIGHT: (C)2010,JPO&INPIT
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