| 摘要 |
<p> Provided is a metal structure containing 17-34 mass% Zn, 0.01-2.5 mass% Sn, 0.005-1.8 mass% Al, and 0.0005-0.030 mass% Pb, the balance being Cu and unavoidable impurities, the above elements being contained in amounts such that the relationships 24≤[Zn] + 5 × [Sn] + 3 × [Al]≤40 and 1.2≤[Sn] + 2 × [Al]≤4.0 are satisfied, the area ratio (γ)% of theγphase and the area ratio (β)% of theβphase in theα-phase matrix having the relationship 0≤2 × (γ) + (β)≤1.5, and 0-0.7% of theγphase and 0-0.9% of theβphase, in terms of area ratio, being dispersed in theα-phase matrix.</p> |
