| 摘要 |
PROBLEM TO BE SOLVED: To provide a copper alloy material which can obtain desired strength, electric conductivity, stress relaxation properties or the like in accordance with the components which have been added such as Ni and Si by subjecting an ingot in which the size of crystallized products and dendrite secondary arm spacing is prescribed to rolling and heat treatment, thus evading the remaining of coarse crystallized products in the final strip product.SOLUTION: The copper alloy material is obtained by subjecting a copper alloy ingot comprising, by mass, 1.0 to 5.0% Ni, 0.2 to 1.1% Si, and the balance Cu with inevitable impurities, and in which the size of crystallized products is 0.5 to 10 μm, and dendrite secondary arm spacing is 10 to 50 μm to rolling and heat treatment. |
