不知道是否有人想过这样的问题，肯德基门为什么使用的都是铝合金型材呢？可以使用的型材那么多，为什们要选择铝？现在人们都把铝称为绿色的金属、节能减排的金属、循环性最好的金属，贮能的金属、质轻的金属、取之不尽用之不竭的金属。
I wonder if anyone has thought about this question. Why did Kendl Ki Men use aluminum alloy profiles? There are so many profiles to use, why do we have to choose aluminum? Now people call it "green metal", "energy saving and emission reducing metal", "best circulating metal", "stored metal", "light metal", and "inexhaustible metal".
1、肯德基门它密度小，有时不规范地说它质量轻，它们的各项力学性能均随着温度下降，而全面升高，这使它们成为一种非常好的制造低温装备的绝妙材料。
1, Kentucky door it density is small, sometimes irregular say its light quality, the mechanical properties of them were increased with a decrease in temperature, and comprehensive, which makes them a perfect material for manufacturing the cryogenic equipment is very good.
2、肯德基门良好的导电导热性能。铝有良好的导热与导电性能，铝的良好导电性能与低密度相结合，使它成为一种良好的远距离输电导体。没有铝，就不会这样经济而有效地将内蒙的电输送到北京、输送到华北，将西部的电顺利运送到华东的工厂与千家万户，将三峡的电输送到珠江三角洲；没有铝，跨越长江上空的特高压超长特大输电工程将成为空想而望江兴叹。
2 、 Kendl Ki Men has good conductivity and thermal conductivity. Aluminum has good thermal conductivity and electrical conductivity. Aluminum combines good conductivity with low density, making it a good conductor for long distance transmission. No aluminum, will not be so economically and effectively in Inner Mongolia electricity to Beijing, transported to the north, the west east power smoothly transported to factories and thousands of households, the Three Gorges electricity to the Pearl River Delta; no aluminum UHV transmission project, ultra long and large across the Yangtze River over will become a fantasy and Wangjiang sigh.
3、断桥铝门窗超强的抗腐蚀性能。铝及铝合金表面有一层比蝉翼还薄得无法比拟的氧化铝膜，这是一层与空气中的氧形成的天然氧化膜。这层膜不但薄得出奇，而且极密实，不能渗透氧，与铝接合得牢牢的，使铝不再遭受腐蚀，也就是不会再氧化，使铝及铝合金在使用期限到了后，经过处理与重熔后可得95%以上的再生铝。
3, broken bridge aluminum doors and windows super corrosion resistance. The surface of aluminum and Aluminum Alloy alumina membrane layer is thinner than Chanyi incomparable, this is a layer formed with oxygen in the air, the natural oxide film. This film not only thin and very dense, surprisingly, impermeable to oxygen, and aluminum bonded firmly, aluminum is no longer subjected to corrosion, it is no longer the oxidation of aluminum and Aluminum Alloy in use period to the post, after processing and after remelting can be recycled aluminum more than 95%.
4、节能及可回收性最强。由于铝及铝合金有很强的抗腐蚀性能，在通常的大气条件下也不用维护保养，即使使用几十年甚至上百年仍完好如初不会腐蚀，如门窗、桥梁等。
4, the most energy-efficient and recyclable. As aluminum and aluminum alloy has a strong corrosion resistance, under normal atmospheric conditions without maintenance, even if used for decades or even hundreds of years, still intact, not corrosion, such as doors and windows, bridges and so on.