研究了固溶、时效对挤压添加钙的三种AM50镁合金组织和力学性能的影响.结果表明:合金挤压后,随着固溶时间的增加,Mg17Al12相以弥散状溶解在基体镁中,而Al2Ca相相当稳定,部分变细,逐步断开并出现球化现象;随着时效时间的增加,Mg17Al12相以粒状从基体中析出,而Al2Ca相在时效过程中变化极小.固溶后,挤压合金的硬度和抗拉强度下降.时效后,挤压添加1%Ca的合金抗拉强度略有升高,未加和加入2%Ca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.未加和加入2%Ca的合金固溶后塑性显著增加,时效后塑性略有下降;而加入1%Ca的合金固溶后塑性略有下降,时效后塑性显著提高.
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