# US 2018/0322979 A1 · Copper alloy wire rod and method for manufacturing copper alloy wire rod > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0322979 A1 - Document ID: US20180322979A1 - Status: Published application - Kind: A1 - Application number: 16/032,431 - Filed: 2018-07-11 - Published: 2018-11-08 - Earliest claimed: 2016-12-02 - Assignees: Furukawa Electric Co., Ltd. - Applicants: Furukawa Electric Co., Ltd. - Inventors: Shigeki SEKIYA; Kengo MITOSE - Web page: https://patentgrep.com/patent/US20180322979A1 ## CPC - H01B 1/026: {Alloys based on copper} - B22D 11/004: {Copper alloys} - B22D 11/005: {of wire (casting on wire B22D19/14)} - C22C 9/00: Alloys based on copper - C22F 1/08: of copper or alloys based thereon - H01B 13/0016: {for heat treatment} - B23K 35/302: {Cu as the principal constituent} - B23K 35/40: Making wire or rods for soldering or welding - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22) - C22C: ALLOYS (treatment of alloys C21D, C22F) - C22F: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass, C23F17/00) - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM ## Abstract A copper alloy wire rod containing Ag: 0.5 wt % or more and 6 wt % or less and the balance including inevitable impurities and Cu, in which, on a cross section parallel to a longitudinal direction of the copper alloy wire rod, within a range observed with a visual field of 1.7 μm in a direction perpendicular to the longitudinal direction and 2.3 μm in a direction parallel to the longitudinal direction, the copper alloy wire rod has at least one rectangular range that is a rectangular range having a width perpendicular to the longitudinal direction of 0.2 μm and a length parallel to the longitudinal direction of 2.3 μm and entirely includes five or more second phase particles containing Ag and having a maximum length in the longitudinal direction of less than 300 nm. ## Claims ### Claim 1 A copper alloy wire rod comprising: Ag: 0.5 wt % or more and 6 wt % or less and the balance including inevitable impurities and Cu, wherein, on a cross section parallel to a longitudinal direction of the copper alloy wire rod, within a range observed with a visual field of 1.7 μm in a direction perpendicular to the longitudinal direction and 2.3 μm in a direction parallel to the longitudinal direction, the copper alloy wire rod has at least one rectangular range that is a rectangular range having a width perpendicular to the longitudinal direction of 0.2 μm and a length parallel to the longitudinal direction of 2.3 μm and entirely includes five or more second phase particles containing Ag and having a maximum length in the longitudinal direction of less than 300 nm. ### Claim 2 (depends on 1) The copper alloy wire rod according to claim 1, wherein the sum of the maximum lengths in the longitudinal direction of the five or more second phase particles entirely included in the rectangular range is 300 nm or more. ### Claim 3 (depends on 1) The copper alloy wire rod according to claim 1, further comprising: one or two or more elements selected from the group consisting of Mg: more than 0 wt and 1 wt % or less, Cr: more than 0 wt and 1 wt % or less, and Zr: more than 0 wt and 1 wt % or less. ### Claim 4 (depends on 1) The copper alloy wire rod according to claim 1, wherein the number of times of vibration durability in a vibration test conducted under a test environment of 80° C. is 10 million times or more. ### Claim 5 (depends on 1) The copper alloy wire rod according to claim 1, wherein a wire diameter of the wire rod is 0.01 mm or more and 0.32 mm or less. ### Claim 6 A method for manufacturing a copper alloy wire rod comprising: a casting step of manufacturing an ingot of copper alloy by casting molten metal containing Ag: 0.5 wt % or more and 6 wt % or less and the balance including inevitable impurities and Cu at a cooling rate of 500° C./s or more; a wire drawing step of manufacturing a wire rod by wire-drawing processing the ingot; and a heat treating step of heat treating the wire rod at a heat treatment temperature of 300° C. or more and 370° C. or less and retention time of 10 seconds or less. ### Claim 7 (depends on 2) The copper alloy wire rod according to claim 2, wherein the number of times of vibration durability in a vibration test conducted under a test environment of 80° C. is 10 million times or more. ### Claim 8 (depends on 3) The copper alloy wire rod according to claim 3, wherein the number of times of vibration durability in a vibration test conducted under a test environment of 80° C. is 10 million times or more. ### Claim 9 (depends on 2) The copper alloy wire rod according to claim 2, wherein a wire diameter of the wire rod is 0.01 mm or more and 0.32 mm or less. ### Claim 10 (depends on 3) The copper alloy wire rod according to claim 3, wherein a wire diameter of the wire rod is 0.01 mm or more and 0.32 mm or less. ### Claim 11 (depends on 4) The copper alloy wire rod according to claim 4, wherein a wire diameter of the wire rod is 0.01 mm or more and 0.32 mm or less. ### Claim 12 (depends on 2) The copper alloy wire rod according to claim 2, further comprising: one or two or more elements selected from the group consisting of Mg: more than 0 wt and 1 wt % or less, Cr: more than 0 wt and 1 wt % or less, and Zr: more than 0 wt and 1 wt % or less.