一、导言镁合金的被应用为工业材料,还是最近三四十年间的事情。虽然金属镁在十九世纪初期即被发现,但因提炼方法上存在的困难不能解决,不能大量的应用。到了二十世纪初期因航空工业的发展,镁合金的需要日渐迫切。经过不断的研究与改进,完全克服了镁合金浇铸技术上的种种困难如镁合金在熔化时的燃烧、砂模浇铸时的燃烧、镁合金熔液中熔渣的隔离等问题,使镁合金的用途日增;尤其在航空工业方面,镁合金已成为最重要的一种工业材料。镁合金的最大优点是质轻与车制容易。它的比重约为铜的五分之一,铁或钢的四分之一,铝的三 First, the introduction of magnesium alloy is applied as industrial materials, or the last thirty or forty years of things. Although magnesium metal was found in the early nineteenth century, the difficulties in refining methods can not be solved and can not be applied in large quantities. To the early twentieth century due to the development of the aviation industry, the need for magnesium alloy is increasingly urgent. After continuous research and improvement, completely overcome the magnesium alloy casting technical difficulties such as magnesium alloy melting in the combustion, sand casting mold combustion, magnesium alloy melt slag isolation and other issues, so that magnesium alloy Increasing use; especially in the aviation industry, magnesium alloy has become the most important kind of industrial materials. The biggest advantage of magnesium alloy is light weight and easy to car. It weighs about a fifth of copper, a quarter of iron or steel, and three of aluminum