采用光学显微镜、XRD衍射分析仪、SEM扫描电镜、维氏硬度计、透射电子显微镜、万能拉伸试验机等仪器研究时效工艺对合金Mg-3.8Zn-2.8Nd-0.6Zr-0.6Cd力学特性的影响.结果显示,时效后合金强度有较大的提高,伸长率略有下降.采取双级时效90℃×10 h+150℃×8 h热处理,合金的屈服强度与抗拉强度分别达到320 MPa和350 MPa.双级时效热处理时,因为分解产物的数量更多、尺寸更小,因此强化效果要比单级时效的更明显.
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