耐热镁合金材料的研究和应用现状

Research and application status of heat resistant magnesium alloy materials

镁合金是比重最轻的结构材料。具有高比强度、高比刚性、良好的磁屏蔽性、优异的制造性和加工性。镁和镁合金作为轻金属材料是非常重要的金属材料。廉价耐热镁合金的应用研究对汽车轻量化和扩大镁合金的应用具有重要意义,但大部分合金只能在室温下使用。当温度超过120℃时,合金的机械特性显著降低,高铝合金也是如此。因此,在要求高使用温度的汽车零部件中,限制了具有优秀铸造加工性的低成本镁合金的使用。因此,近年来,高性能、低成本的阻燃耐热镁合金的开发成为材料科学和产业界关注的焦点之一。

Magnesium alloy is the lightest structural material.It has high specific strength,high specific stiffness,good magnetic shielding,excellent manufacturability and processability.Magnesium and magnesium alloys are very important metal materials as light metal materials.The research on the application of low-cost heat-resistant magnesium alloys is of great significance to the lightweight of vehicles and the expansion of the application of magnesium alloys,but most of the alloys can only be used at room temperature.When the temperature exceeds 120℃,the mechanical properties of the alloy decrease significantly,so does the high aluminum alloy.Therefore,the use of low-cost magnesium alloy with excellent casting processability is limited in automotive parts requiring high service temperature.Therefore,in recent years,the development of high-performance,low-cost flame-retardant and heat-resistant magnesium alloys has become one of the focuses of materials science and industry.