在研究了慢加载条件下拉伸速率与球墨铸铁间力学性能的关系后 ,将试验对象扩展到铸铝合金 .结果证实 ,在ε′ =10 -1～ 10 -4s-1范围内 ,铸铝合金的力学性能亦随拉伸速率的逐渐减慢呈峰状变化 ,即先逐渐增加 ,到某一最大值后又逐渐降低 ,曲线的走向与球墨铸铁的相应曲线极为相似 . After investigating the relationship between the tensile rate and the mechanical properties of ductile iron under slow loading conditions, the test object was extended to cast aluminum alloy and the results showed that in the range of ε ’= 10 -1 -10 -4s-1, The mechanical properties of the alloy also showed a peak-like change with the gradual slowing down of the drawing rate, that is, firstly, it gradually increased to a certain maximum and then gradually decreased. The trend of the curve was very similar to that of the ductile iron.