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Why aluminium can be used in a huge variety of products?We can see through the <strong>
aluminum alloys </strong>production process to intuitively understand the characteristics of aluminum.<br>
Aluminium is a good electrical conductor and is often used in electrical transmission lines. It is cheaper than copper and weight for weight is almost twice as good a conductor.<br>
Rolling begins with huge sheet ingots weighing as much as 20 tons that have been preheated to make aluminum easier to shape.<br>
As the size of rolling mills has increased, so has the size of these ingots, but a typical ingot is about 1828mm wide, 6096mm long, and more than 610mm thick.<br>
The ingot is first fed into a breakdown mill, where it is rolled back and forth, reversing between the rolls until the thickness has been reduced to just a few inches.<br>
At this point, some plate is removed and readied for shipment. The plate is heattreated and quickly cooled, or quenched, for added strength and then stretched to straighten and relieve internal stress built up during rolling and heat-treating. Finally, the plate is trimmed and aged at the desired temperature to develop its final properties.<br><strong>Aluminum alloy plate</strong> that is slated to become
aluminum sheet or
aluminum foil is trimmed after leaving the breakdown mill and sent through a continuous mill to reduce thickness further. Sheet thicknesses are then coiled.<br>
Cold rolling is the last step for some
aluminum sheet. But other types, known as heat-treatable, are subjected to further elevated-temperature processing to increase their strength.<br>
So ,aluminium is used in a huge variety of products including cans, foils, kitchen utensils, window frames, beer kegs and aeroplane parts. This is because of its particular properties. It has low density, is non-toxic, has a high thermal conductivity, has excellent corrosion resistance and can be easily cast, machined and formed. It is also non-magnetic and non-sparking. It is the second most malleable metal and the sixth most ductile.<br>
when evaporated in a vacuum, aluminium forms a highly reflective coating for both light and heat. It does not deteriorate, like a silver coating would. These aluminium coatings have many uses, including telescope mirrors, decorative paper, packages and toys.<br>
It is often used as an alloy because aluminium itself is not particularly strong. Alloys with copper, manganese, magnesium and silicon are lightweight but strong. They are very important in the construction of aeroplanes and other forms of transport.</p>