Patent ID: 9512506
Filing Date: 2016-12-06
CPC Classification: C22C,C22F,H01B,Y10T

Claim Text:
1. A high strength and high conductivity copper rod or wire produced by a process including a continuous casting and rolling process, the copper rod or wire comprising: Co of 0.12 to 0.32 mass %; P of 0.042 to 0.095 mass %; Sn of 0.005 to 0.70 mass %; and O of 0.00005 to 0.0050 mass %, wherein a relationship of 3.0≦([Co]−0.007)/([P]−0.008)≦6.2 is satisfied between a content [Co] mass % of Co and a content [P] mass % of P, and the remainder includes Cu and inevitable impurities, and wherein a rolling start temperature in the continuous casting and rolling process is 860 to 1000° C., a total hot processing rate is 75% or higher, and an average cooling rate in a temperature range of 850 to 400° C. is 10° C./second or higher, a non-recrystallization ratio of a metal structure at completion of the continuous casting and rolling process is 10 to 80% and an average grain size of a recrystallized part is 2.5 to 25 μm, and the non-recrystallization ratio in a vicinity of an outer peripheral portion of the copper rod or wire is effectively higher than the non-recrystallization ratio in a center portion of the copper rod or wire, effective to increase the tensile strength in the outer peripheral portion, the outer peripheral portion corresponding to a portion of 6/7R from the center portion of the copper rod or wire.