COPPER WIRE AND METHOD FOR PRODUCING THE SAME

• Main Authors: AOYAMA MASAYOSHI, WASHIMI TORU, FUJITO KEISUKE, SAGAWA HIDEYUKI, HIRUTA HIROYOSHI, GOTO MASAYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 27.10.2014
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; CONDUCTORS; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INSULATORS; METALLURGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; TREATMENT OF ALLOYS OR NON-FERROUS METALS

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. 【課題】溶接性がタフピッチ銅（３Ｎ銅）からなる銅線よりも良好で、引張強度が高純度銅（６Ｎ銅）からなる銅線よりも高い銅線及びその製造方法を提供する。【解決手段】銅線は、結晶方位が［１１１］であり、原子面上の回転角度が異なる複数の結晶粒を有する無酸素銅（４Ｎ銅）からなる銅線材を用いた銅線であって、前記結晶粒の直径が前記銅線材の直径の１／３以下であり、かつ、前記銅線材の引張強度が２００ＭＰａ以上である。【選択図】図１