Patent ID: 8845829
Filing Date: 2014-09-30
Classification: C22C,C22F

Abstract:
1. A method of manufacturing a Cu alloy conductor with a rolled casting material formed by continuous casting and rolling using a molten Cu alloy, comprising: adding and dissolving In of 0.1-0.7 weight % to a Cu matrix containing oxygen of 0.001-0.1 weight % to form the molten Cu alloy having a balance being Cu; performing a continuous casting with the molten Cu alloy and rapidly quenching a casting material to a temperature at least 15° C. lower than a melting point of the molten Cu alloy such that a size of indium oxides crystallized or precipitated in the casting material and a crystal particle size of the casting material are respectively smaller with respect to casting performed at a normal casting temperature within a range from 1120 to 1200° C.; controlling the casting material at a temperature equal to or lower than 900° C.; performing a plurality of hot rolling processes on the casting material such that a temperature of a final hot rolling is within a range from 500 to 600° C. to form the rolled casting material; forming a roughing wire from the rolled casting material; and performing cold work on the roughing wire at a temperature within a range from −193° C. to 25° C. such that a degree of processing is equal to or greater than 50%, wherein dislocation introduced during rolling is rearranged and a very small sub-boundary is formed in crystal particles, wherein the Cu alloy conductor after the cold work has a crystal structure comprising the crystal particles having an average particle diameter of 100 μm or less, wherein 80% or more of the indium oxides are dispersed as micro oxides having an average particle diameter equal to or less than 1 μm in a matrix of the crystal structure, and wherein the sub-boundary is formed in the crystal particles.