一、相图工业用铍青铜中含0.2～0.5%Ni,故铍青铜实际上是Cu-Be-Ni三元系合金。图1及图2为此三元系铜角820°及500℃的等温切面。由图可以看出,含Ni时,Be在铜中的固溶度急剧降低。在820°时,二元合金中Be在Cu中的固溶度为2.4%,含0.5%Ni的三元合金,其同溶度已降至0.8%左右,共析温度则由～605℃升至642℃(见图3)。 First, phase diagram Industrial beryllium containing 0.2 to 0.5% Ni, so beryllium bronze is actually Cu-Be-Ni ternary alloy. Figure 1 and Figure 2 for this ternary system copper angle of 820 ° and 500 ℃ isothermal section. It can be seen from the figure that when Ni is contained, the solubility of Be in copper sharply decreases. At 820 ° C, Be has a solid solubility of 2.4% in Cu and a ternary alloy containing 0.5% Ni. The solubility of Be in the binary alloy has been reduced to about 0.8%, and the eutectoid temperature has risen from ~ 605 ° C To 642 ° C (see Figure 3).