| 摘要 |
PROBLEM TO BE SOLVED: To provide a copper wire in which weldability is more satisfactory than that of a copper wire made of tough pitch copper (3N copper) and tensile strength higher than that of a copper wire made of high purity copper (6N copper), and a method for producing the same.SOLUTION: Provided is a copper wire using a copper wire rod made of oxygen-free copper (4N copper) having a plurality of crystal grains in which crystal orientation is [111] and the rotation angles on atomic planes are different, in which the diameter of the crystal grains is lower than 1/3 of the diameter of the copper wire rod, and also, the tensile strength of the copper wire rod is 200 MPa or higher. |
