Method for manufacturing a conductive wire
A method for manufacturing a conductive wire includes conducting a continuous casting of a conductive alloy material at a casting rate of not less than 40 mm/min and not more than 200 mm/min to form a conductive wire with a primary diameter, the conductive alloy material containing not more than 1.0 mass % of an added metal element, reducing a diameter of the conductive wire with the primary diameter to form a conductive wire with a secondary diameter, heat treating the conductive wire with the secondary diameter so that tensile strength thereof is reduced to not less than 90% and less than 100% of tensile strength before the heat treating, and reducing a diameter of the conductive wire with the secondary diameter and the reduced tensile strength to generate a logarithmic strain of 7.8 to 12.0 therein to form a conductive wire with a tertiary diameter.
1. A method for manufacturing a conductive wire, comprising:
conducting a continuous casting of a conductive alloy material at a casting rate of not less than 40 mm/min and not more than 200 mm/min to form a conductive wire with a primary diameter, the conductive alloy material containing not more than 1.0 mass % of an added metal element;
reducing a diameter of the conductive wire with the primary diameter to form a conductive wire with a secondary diameter;
heat treating the conductive wire with the secondary diameter so that tensile strength thereof is reduced to not less than 90% and less than 100% of tensile strength before the heat treating; and
reducing a diameter of the conductive wire with the secondary diameter and the reduced tensile strength to generate a logarithmic strain of 7.8 to 12.0 therein to form a conductive wire with a tertiary diameter.
2. The method according to claim 1 , wherein the heat treatment is performed such that a diffraction image with a circular spot is observed in a metal structure of the conductive wire with secondary diameter.
3. The method according to claim 1 , wherein the conductive alloy material comprises a copper-based alloy material, a silver-based alloy material or a nickel-based alloy material.
4. The method according to claim 3 , wherein the copper-based material comprises a Cu—Ag alloy, a Cu—Sn alloy, a Cu—Sn—In alloy, a Cu—Sn—Mg alloy or a Cu—Mg alloy.
5. The method according to claim 3 , wherein the silver-based material comprises an Ag—Cu alloy.
6. The method according to claim 3 , wherein the nickel-based material comprises a Ni—Cu alloy.
7. The method according to claim 1 , wherein the tertiary diameter is not less than 13 μm and not more than 40 μm.
8. A method for manufacturing a cable, comprising a conductive wire that is manufactured by the method according to claim 1 .