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一、铝的特征 1.铝的机械性质 密度:铝的密度为2.7kg/dm~3,与铁的7.87kg/dm~3和铜的8.90kg/dm~3相比,轻得多,大约只有它们重量的1/3。 强度:纯铝很软,强度值也低,但是添加铜,镁等元素制成合金,经淬火时效处理,强度值很高,再添加锌,则可获得更高的强度值。 铝合金经淬火和其它热处理可以获得各种各样的性质。这些热加工均附加了热处理符号。表1表示出日本工业标准的附加符号及其含义。 导电性:铝有较高的导电性,仅次于铜,约为铜的64％。铝
First, the characteristics of aluminum 1, the mechanical properties of aluminum Density: the density of aluminum is 2.7kg / dm ~ 3, compared with iron 7.87kg / dm ~ 3 and copper 8.90kg / dm ~ 3, much lighter, about Only 1/3 of their weight. Strength: Pure aluminum is very soft, the strength value is low, but the addition of copper, magnesium and other elements made of alloy, quenched and aged, high intensity value, then add zinc, you can get higher intensity value. Aluminum alloys can be hardened and other heat treatments to achieve a wide variety of properties. These thermal processes are attached heat treatment symbol. Table 1 shows the Japanese industrial standard additional symbols and their meanings. Conductivity: Aluminum has a higher conductivity, second only to copper, about 64% of copper. aluminum