| 摘要 |
PURPOSE:To provide functional characteristics such as a shape memorizing effect or superelastic behavior by preparing an alloy composition consisting of a specified amount of Zn, a specified amount of Zr and the balance Cu. CONSTITUTION:This alloy consists of, by weight, 38-45% Zn, 0.003-0.3% Zr and the balance Cu, 10-35% Zn, 0.003-0.3% Zr, <12% Al and the balance Cu, or 10-45% Zn, 0.003-0.3% Zr, one or more among Si, Sn, Ag, Ni, Mg, Sb, Ga, Ge, In, etc. in a range where the alloy has a beta-phase structure, and the balance Cu. The reason why the Zn content is regulated to 10-45% is that <10% Zn hardly produces a functional effect and >45% Zn deteriorates the workability. When the Zr content is <0.003%, the effect of improving the functional characteristics is insufficient, and >0.3% Zr causes a change in the transformation temp. zone. |
