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为提高ZM5镁合金阻燃性能,在其中添加了0.1wt%的混合稀土(RE)。通过分析该合金的氧化增重TGA曲线、热量变化DSC曲线和表面氧化膜的XRD谱、SEM图像及膜内元素分布,对其表面氧化行为进行了研究,并对力学性能和切削阻燃效果进行了研究。结果表明,添加0.1wt%RE能显著提高ZM5合金的抗氧化性能,在连续升温过程中氧化增重主要发生在500～700℃,生成的保护性氧化膜主要由RE2O3、MgO、Al2O3和Mg17Al12组成,厚度为2.5～3.5μm,合金力学性能和切削阻燃效果均得到显著改善。
In order to improve the flame retardancy of ZM5 magnesium alloy, 0.1wt% mixed rare earth (RE) was added into it. The surface oxidation behavior of the alloy was studied by analyzing the TGA curve, the DSC curve of the DSC curve, the XRD spectrum of the surface oxide film, the SEM image and the elemental distribution in the film. The mechanical properties and cutting flame retardancy were also studied Study. The results show that the addition of 0.1wt% RE can significantly improve the oxidation resistance of ZM5 alloy. The weight gain mainly occurs at 500-700 ℃ during continuous heating. The protective oxide film mainly consists of RE2O3, MgO, Al2O3 and Mg17Al12 , The thickness of 2.5 ~ 3.5μm, the mechanical properties of alloys and cutting flame-retardant effect have been significantly improved.