Cu-Ni-Si ALLOY AND MANUFACTURING METHOD THEREFOR

摘要

This Cu-Ni-Si alloy contains 2.2-3.2 mass% Ni, 0.4-0.8 mass% Si, and 0.1-1.0 mass% Zn and the remainder is configured from Cu and unavoidable impurities. The mass ratio of Ni to Si is 4.0-5.5. The number of particles having a particle diameter of 0.1-3.0 µm and dispersed in a base metal (1) is 1×106-9×106 per unit square mm in a cross-section perpendicular to the rolling direction, and 1-30% of the particles are particles (2) having a particle diameter of 0.3-3.0 µm. The crystal grain size of the base metal (1) is less than 5 µm. The conductivity of the Cu-Ni-Si alloy is at least 60% IACS.