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目前,高强度的轻型材料的开发颇为引人注目,而且已取得若干实质性的进展。首先是镁合金材料,这种材料200℃以上的加工性良好,不亚于铝合金。但低于200℃时,镁的晶体结构为最致密的六面体结构。加工性差,若在室温下进行塑性加工,会全面开裂。因此镁合金制品主要通过铸造成型。今后为满足构件轻型化和安全性的需要,开发延展用镁合金是当务之急。镁合金由于比铝合金更轻,故日益受到人们的重视。在汽车部件、计算机部件等方面的使用越来越多。新型镁合金成形性好,并能轧制成薄板,加上重量轻,故最适用于携带式电子设备和宇航设备的外壳。电子设备通常会泄漏电磁波,为防止这种泄漏必须采用金属作电磁屏蔽,而用镁合金做壳体可达到这一
At present, the development of high-strength lightweight materials is quite noticeable and a number of substantive advances have been made. The first is the magnesium alloy material, this material has good workability above 200 ℃, no less than aluminum alloy. But below 200 ℃, the crystal structure of magnesium is the most compact hexahedral structure. Poor workability, if plasticized at room temperature, will be fully cracked. Therefore, magnesium alloy products mainly through casting molding. In the future to meet the needs of component lightweight and safety, the development of magnesium alloy for extension is a priority. Magnesium alloy lighter than aluminum, it is increasingly subject to people’s attention. More and more used in the automotive parts, computer parts and so on. New magnesium alloy formability, and can be rolled into thin plates, coupled with light weight, it is most suitable for portable electronic equipment and aerospace equipment shell. Electronic equipment usually leaks electromagnetic waves. To prevent such leakage, a metal must be used for electromagnetic shielding, and a magnesium alloy shell can be used to achieve this