Aluminum and aluminum alloy hot rolled plate GB 3193-82

Introduction Aluminium and its alloys are the most used nonferrous materials around the world due to its lightweight and durability compared to other materials, These advantages make aluminum and its alloys suitable for a wide range of applications ranging from cast products, wrought products, and thermally and mechanically processed products. Cold rolling and hot rolling are two methods of making aluminum and its alloys sheet materials. Although cold rolling and hot rolling have similarities, the final product of hot rolling is superior to that of cold rolling in terms of mechanical properties. Hot rolling is an important process with various advantages. In this paper, the process of hot rolling aluminum and its alloys will be discussed in detail. Discussion Hot rolling process is a process in which the metal is heated above its recrystallization temperature and then passed between rollers to obtain the desired shape and structure. Hot rolling is done with the intention of producing thinner, higher strength steel plates and strips. The aluminum or its alloys are heated up to temperatures in excess of 350°C. This is done to allow the metal to become malleable so it can be stretched, squeezed and deformed more easily. The aluminum alloy is then usually passed through high capacity machines with two or three rollers. The rollers press down onto the aluminum alloy very hard and form it into a thin sheet material, with the thickness of the sheet being determined by the number and size of the rollers. During the rolling process, the aluminum alloys act strenuously and slip through the rollers. The mills are equipped with guards to prevent particles and other debris from being caught in the rollers and contaminating the aluminum alloy. The aluminum alloy is cooled after the rolling process and then it is heat-treated to increase the strength and hardness of the material, effectively increasing its performance. The heat treatment is done depending on the type of product that is desired, from quenching to annealing. In aluminum and its alloys hot rolling process, it is important to consider not only the roll ratio of the rollers but also the coefficient of friction and the effects of grain sliding during rolling. The coefficient of friction between the rollers and the aluminum alloy is one of the most important factors affecting the rolling process. If a large coefficient of friction is used, the sheet material will deform after only a few passes, resulting in an uneven thickness across the sheet. This can also cause the sheet to tear. In general, hot rolling of aluminum and its alloys eliminates the scaling found in cold rolling processes. This results in a smoother, neater product with fewer imperfections. Hot rolling is also done in equipment specially designed for aluminum and its alloys . These machines are much larger and heavier than those for cold rolling. The weights placed onto the rollers also create further tension on the material, making it even stronger and more durable. The tension created depends on the type of deformation that is desired. Advantages Hot rolling of aluminum and its alloys has some significant advantages over cold rolling. The main advantage of hot rolling is that it can produce thinner sheets with higher strength. The high temperatures used in the process increase the ductility of the aluminum alloy, allowing it to be formed into thinner sheets and then heat-treated after to increase its strength. The hot rolling process also creates a more uniform surface, with fewer imperfections and surface flaws than can be seen in cold-rolled sheets. Hot rolling also avoids the scaling and decarburization that can occur during cold rolling, making for a cleaner and smoother product. The process is also much more efficient and can produce larger quantities of metal with fewer passes. This makes the process much more cost-effective. Conclusion In conclusion, hot rolling is an important process for the production of aluminum and its alloys . It is most widely used for the production of thinner sheets with higher strength. This process has numerous advantages over cold rolling, such as better strength and uniform surfaces, as well as being more cost-efficient. With the advancements being made in the hot rolling process, it has become even more attractive for use in the production of aluminum and its alloys.