Aluminum is an extremely rich metal element on the earth, and its reserves rank first among metals. It was not until the end of the 19th century that aluminum
emerged as a very competitive metal in engineering applications, and it became popular for a while. The development of the three important industries of aviation, construction, and automobiles requires the characteristics of materials to have the unique properties of aluminum and its alloys, which greatly facilitates the production and application of this new metal—aluminum. Aluminum (Al) is a kind of light metal. Its compound is widely distributed in nature. The resource of aluminum in the earth's crust is about 40-50 billion tons, second only to oxygen and silicon, ranking third. Among the metal varieties, it is the first type of metal. Aluminum has special chemical and physical properties. It is not only light in weight, strong in texture, but also has good ductility, electrical conductivity, thermal conductivity, heat resistance and nuclear radiation resistance. It is an important basic raw material for the development of the national economy. 1. According to the different content of alloying elements, aluminum plates can be divided into: 1xxx series is industrial pure aluminum (Al), 2xxx series is aluminum copper alloy aluminum plate (Al--Cu), 3xxx series is aluminum manganese alloy aluminum plate (Al--Mn) , 4xxx series are aluminum-silicon alloy aluminum plates (Al--Si), 5xxx series are aluminum-magnesium alloy aluminum plates (Al--Mg), 6xxx series are aluminum-magnesium-silicon alloy aluminum plates (AL--Mg--Si), and 7xxx series are Aluminum-zinc alloy aluminum plate [AL--Zn--Mg--(Cu)], 8xxx series is aluminum and other elements. Generally, each series must be followed by three digits, and each digit must have a number or letter. The meaning is: the second digit indicates the number of controlled impurities; the third and fourth digits indicate the lowest percentage of pure aluminum content after the decimal point. content. 2. According to the shape, it can be divided into: round aluminum rod, square aluminum rod, hexagonal aluminum rod and trapezoidal aluminum rod. casting includes melting, purification, impurity removal, degassing, slag removal and casting process. The main process is: (1) Ingredients: According to the specific alloy grades that need to be produced, calculate the addition amount of various alloy components, and reasonably match various raw materials. (2) Smelting: The prepared raw materials are added to the smelting furnace to melt according to the process requirements, and the slag and gas in the melt are effectively removed by degassing and slagging refining methods. (3) Casting: Under certain casting process conditions, the molten aluminum is cooled and casted into round casting rods of various specifications through a deep well casting system.
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