| 摘要 |
The invention provides a Cu—Ni—Sn—P alloy sheet satisfying the resistance property of stress relaxation in the direction perpendicular to the rolling direction and excellent in the other necessary properties as terminals and connectors. The invention relates to a Cu—Ni—Sn—P alloy sheet having a specific composition, which is made to contain specific atomic clusters containing at least any of an Ni atom or a P atom, as detected with a three-dimensional atom probe field ion microscope, in a specific density, by increasing the reduction ratio in the final cold rolling and by intentionally shortening the time for the rolling and the time to be taken before the final annealing at low temperature, and of which the necessary properties as a terminal or connector 3 are improved in that the resistance property of stress relaxation thereof in the direction perpendicular to the rolling direction is enhanced and the difference (anisotropy) in the resistance property of stress relaxation thereof between the parallel direction and the perpendicular direction to the rolling direction is reduced.
|
