After aging treatment, the alloy hardness increased to its peak fast then decreased, tensile properties of AM50 and AM50+2%Ca decreased a little while tensile properties of AM50 + 1% Ca increased a little.

• 时效后,挤压添加1%25Ca的合金抗拉强度略有升高,未加和加入2%25Ca的抗拉强度略有下降,三种合金的硬度增加到峰值后逐步下降。