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铝是有色金属中用量最大的金属。一方面,这是由于铝资源丰富,它是地壳中含量最高的三个元素之一,地下数十公里范围内,有8％的物质是铝。单独铝土矿石,世界已探明的储量就达210亿t,可供人类使用100多年。另一方面是因为金属铝比重小,导电和导热性能好,抗大气腐蚀能力强,能与其它元素结合成各种高强度的合金,而且这些铝合金可以很顺利地进行浇铸、轧制、挤压、拉拔、铆接、焊接和切削,具有理想的成型性。 传统用铝最多的方面如制造输电线、飞机及炊具等民用轻工产品。70年代以来,随着科学技术的发展和
Aluminum is the largest amount of non-ferrous metals in the metal. On the one hand, this is due to the abundance of aluminum resources. It is one of the three most abundant elements in the crust. Within the tens of kilometers underground, 8% of the material is aluminum. Bauxite alone, the world has proven reserves of 21 billion t, for human use more than 100 years. On the other hand, because of the small proportion of metallic aluminum, good electrical and thermal conductivity, strong resistance to atmospheric corrosion, it can be combined with other elements into various high-strength alloys, and these aluminum alloys can be smoothly cast, rolled and extruded Pressure, drawing, riveting, welding and cutting, with the ideal shape. The most traditional aspects of aluminum, such as the manufacture of power lines, aircraft and cooking utensils and other civilian light industrial products. Since the 1970s, with the development of science and technology