关键词: 镁合金, 耐热性, 合金元素

Abstract:

        Magnesium alloy material has been widely applied in the field of aviation, aerospace, advanced equipment manufacturing and automobile. However, its application is bewildered by the problem of poor high temperature resistance. This paper reviews the research advances on two heatresistant magnesium alloys, aluminumcontaining heatresistant magnesium alloy and aluminumfree heatresistant magnesium alloy. The addition of mixed rare earth elements can improve its comprehensive mechanical properties for aluminumcontaining heatresistant magnesium alloy. The addition of alkalineearth metal can improve its flame retardant and refine its grain. The addition of IV/V group elements can significantly improve its high temperature mechanical property. The addition of rareearth elements can also be favorable for magnesium alloy material with excellent comprehensive properties for aluminumfree heatresistant magnesium alloy. MgTh and MgAg series magnesium alloys have better high temperature creep resistance property. Alloying and microalloying will provide important theoretical reference for the development and applications of new type magnesium alloy materials with their indepth research, and will also provide broader development prospects for magnesium alloy.

Key words: magnesium alloy, heat resistance, alloying elements