| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of copper alloy twisted wire which can reduce frequency of wire snapping in a twisted wire processing and has good strength and extension, and the copper alloy twisted wire which frequency of wire snapping in a twisted wire processing is reduced and has good strength and extension.SOLUTION: A casting of chemical composition that contains total 1.0-2.0 mass% of at least one of additional elements selected from a group including Fe, Ti, Sn, Ag, Mg, Zn, Cr or P, and the remainder is Cu and inevitable impurities is molded. A wrought product is shaped by giving the casting a plastic working. An intermediate wire rod is shaped by giving the wrought product wire drawing. The wire rod are annealed. A single wire is shaped by giving wire drawing to the annealed intermediate wire rod so that the cold processing rate is 77-99%. A twisted wire is shaped by twisting several single wires, and the twisted wire is given heat-treatment. In this way, copper alloy twisted wire is get. |
