抄録
The relationships between cooling rate, structures and mechanical properties in slowly cooled 9.7/4.7/5.3 cast nickel aluminium bronze are described. The relation between the proof stress depending on the rate of cooling, and the number of κ phases in unit area N is discussed. The following formula is approximately true and this relation could be explained in dealing with the nickel aluminium bronze as a precipitation-hardening alloy. σ_s \fallingdotseqK\sqrtN K: constant, N ≥1
