两种β-黄铜的TTT图

TTT-Diagrams of Twoβ-brass

测定了 Cu- 4 2 .85Zn( wt% )以及 Cu- 2 6.84 Zn( wt% ) - 4 .2 2 Al( wt% )的 TTT图 ,表明β-黄铜贝氏体等温转变存着明显的 Bs温度和两个独立的“C”曲线 ;计算了 Avrami方程中的 n和激活能 Q,并用其判断贝氏体组织类型。

The TTT diagrams of Cu- 4 2 .85 Zn(wt% ) and Cu- 2 6 .84Zn(wt% ) - 4 .2 2 Al(wt% ) have been studied by quantitative metallography.The results show that there are obvious Bs tem- perature and two intersecting c curves.N values in Avrami equation and active energy Q have been calculated and used to classify the kinds of bainites.