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通过合金制备、显微组织分析及力学性能测试研究了添加稀土铈及固溶处理对ZM5镁合金显微组织和力学性能的影响。结果表明:随铈添加量的增加,ZM5合金中粗大的β-Mg_(17)Al_(12)相逐渐由网状转变为块状,同时形成含铈的稀土化合物,在410℃×20 h的固溶处理后,β相几乎溶解到α-Mg基体中。铈添加量达到0.7%时,合金的室温力学性能最好,其固溶态抗拉强度和断后伸长率分别达到278 MPa和8.05%。
The effects of adding rare earth cerium and solution treatment on the microstructure and mechanical properties of ZM5 magnesium alloy were studied by means of alloy preparation, microstructure analysis and mechanical properties testing. The results show that the coarse β-Mg_ (17) Al_ (12) phase in ZM5 alloy gradually changes from reticular to lumpy with the addition of cerium, and forms cerium-containing rare earth compounds at 410 ℃ for 20 h After solution treatment, the β phase dissolves almost into the α-Mg matrix. When the addition of cerium reaches 0.7%, the mechanical properties of the alloy at room temperature are best, and the solid solution state tensile strength and elongation at break reach 278 MPa and 8.05% respectively.