NANO-GRAINED MULTILAYER COPPER ALLOY SHEET HAVING HIGH STRENGTH AND HIGH ELECTRICAL CONDUCTIVITY, AND METHOD FOR MANUFACTURING SAME

摘要

A nano-grained multilayer copper alloy sheet having high strength and high electrical conductivity according to the present invention is characterized in that the sheet is prepared by repetitively roll-bonding an oxygen-free copper (OFC) alloy and deoxidized low-phosphorous copper (DLP) alloy thus having an electrical conductivity of 85 IACS (%) or more and a tensile strength of 400 MPa or more. A method for manufacturing a nano-grained multilayer copper alloy sheet having high strength and high electrical conductivity, according to the present invention, is characterized in that it comprises: a raw material preparation step of preparing a sheet comprised of an oxygen-free copper (OFC) alloy and deoxidized low-phosphorous copper (DLP) alloy; a surface treatment step of performing surface treatment on the sheet; and a sheet forming step of repetitively roll-bonding the sheet to form a nano-grained multilayer copper alloy sheet having high strength and high electrical conductivity which has an electrical conductivity of 85 IACS (%) or more and a tensile strength of 400 MPa or more.