US 12,134,814 B2
Cu—Ni—Si-based copper alloy sheet material, method for producing same, and current-carrying component
Wanqing Jiang, Tokyo (JP); Hiroshi Hyodo, Tokyo (JP); Hisashi Suda, Tokyo (JP); and Akira Sugawara, Tokyo (JP)
Assigned to DOWA METALTECH CO., LTD., Tokyo (JP)
Appl. No. 17/785,069
Filed by DOWA METALTECH CO., LTD., Tokyo (JP)
PCT Filed Dec. 23, 2020, PCT No. PCT/JP2020/048167
§ 371(c)(1), (2) Date Jun. 14, 2022,
PCT Pub. No. WO2021/140915, PCT Pub. Date Jul. 15, 2021.
Claims priority of application No. 2020-002365 (JP), filed on Jan. 9, 2020; and application No. 2020-209551 (JP), filed on Dec. 17, 2020.
Prior Publication US 2023/0018758 A1, Jan. 19, 2023
Int. Cl. C22F 1/08 (2006.01); C22C 9/06 (2006.01)
CPC C22F 1/08 (2013.01) [C22C 9/06 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A copper alloy sheet material having a chemical composition containing, in terms of percentage by mass, Ni: 1.00 to 4.50%, Si: 0.10 to 1.40%, Co: 0 to 2.00%, Mg: 0 to 0.50%, Cr: 0 to 0.50%, P: 0 to 0.20%, B: 0 to 0.20%, Mn: 0 to 1.00%, Sn: 0 to 1.00%, Ti: 0 to 0.50%, Zr: 0 to 0.30%, Al: 0 to 1.00%, Fe: 0 to 1.00%, Zn: 0 to 1.00%, Ag: 0 to 0.30%, Be: 0 to 0.15%, and balance of Cu, with unavoidable impurities, having an area ratio SB/Ss of 0.40 or more in an EBSD (electron backscatter diffractometry) measurement in a measurement region provided in a range of from a ¼ sheet thickness position to a ¾ sheet thickness position on a cross section extending in a sheet thickness direction and perpendicular to a rolling direction, wherein Ss represents an area of a region satisfying at least one of a crystal orientation difference from the S1 {241}<112>orientation of 10° or less or a crystal orientation difference from the S2 {231}<124>orientation of 10° or less, and SB represents an area of a region having a crystal orientation difference from the Brass {011}<211>orientation of 10° or less.