| 摘要 |
Provided are: a Cu-Ni-Si based alloy which combines high strength and high notched bend properties; and a process for manufacturing the same. The Cu-Ni-Si based alloy contains 0.8 to 4.5 mass% of Ni and 0.2 to 1.0 mass% of Si with the balance consisting of copper and unavoidable impurities. Further, the Cu-Ni-Si based alloy exhibits an area fraction of Cube orientation {001}<100> of 10 to 80%, an area fraction of Brass orientation {110}<112> of 20% or less, and an area fraction of Copper orientation {112}<111> of 20% or less, when analyzed for crystal orientation in a thicknesswise central part of the sheet by conducting EBSD measurement in parallel to the thickness direction of the sheet, said thicknesswise central part of the sheet being a part that exists at a depth of 45 to 55% of the thickness of the sheet. |
