Cu-Ni-Si copper alloy strip with excellent mold wear resistance

摘要

To provide a Cu-Ni-Si based copper alloy excellent in die abrasion.SOLUTION: The Cu-Ni-Si based copper alloy strip contains, by mass%, Ni: 2.0-5.0% and Si: 0.3-1.5%, with an Ni/Si ratio of 1.3 or more and 6.7 or less, the remainder consisting of Cu and inevitable impurities, and has a 0.2% yield strength YS of 700 MPa or more. When sandwiching a sample on the outer side of the punch to press a central portion of the sample cut into 5×15 mm in the plate thickness direction toward a die facing the punch using a rolling parallel direction as the longitudinal direction to a depth of a plate thickness×0.2 by a punch of a 5 mm square and analyzing the crystal orientation of a cross section in the longitudinal direction by EBSD, an area ratio occupied by<111>//ND orientation is 3.0% or more.SELECTED DRAWING: Figure 1