Introduction to Aluminum Processing

Aluminum processing, processing aluminum ingots into materials by plastic processing methods, the main methods are rolling, extrusion, stretching and forging. Aluminum processing began to be produced in an industrial manner at the beginning of the 20th century. Before the 1930s, copper processing equipment was basically used, and the products were mainly used in aircraft manufacturing. After the 1960s, aluminum production has developed rapidly, with an annual growth rate of about 4 to 8%. The products are widely used in aviation, construction, transportation, electrical, chemical, packaging and daily necessities industries. The output is second only to steel, ranking second in metal materials. In the mid-1950s, China built a larger aluminum processing plant and formed a production system. The products have been serialized. There are seven alloy series, which can produce plates, strips, foils, pipes, bars, profiles, wires and forgings. (Free forgings, die forgings) eight categories of products.

Plastic processing of aluminum and aluminum alloys should ensure that the product achieves stable, consistent required dimensional accuracy, mechanical properties and good surface quality. Also pay attention to prevent mechanical damage and corrosion, control the grain size and structure, these quality requirements are mainly guaranteed by the production process and equipment. Aluminum and its alloys generally have good plasticity and are easy to plastically process. The phase composition of duralumin is relatively complex, and there are brittle structures such as low-melting phase and intermetallic compounds. Its plastic processing has some characteristics: such as homogenization treatment to eliminate internal stress and intragranular segregation generated when the billet is cooled; billet billet The surface should be milled to remove the surface segregation produced by the low melting phase. Some aluminum alloys are also clad with aluminum to improve corrosion resistance and workability. Aluminum alloys are sensitive to overheating, and the heating temperature must be strictly controlled.