The Introduction of Aluminum Processing
The plastic working of aluminum and aluminum alloys should ensure stable, consistent dimensional accuracy, mechanical properties and good surface quality. Care must also be taken to prevent mechanical damage and corrosion, and to control grain size and texture. 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 hard aluminum is complicated, and there are brittle structures such as a low-melting phase and an intermetallic compound. Its plastic processing has some characteristics: such as homogenization to eliminate the internal stress and intragranular segregation generated when the billet is cooled; the surface of the billet is milled to remove the surface segregation generated by the low-melting phase. Some aluminum alloys are also coated with aluminum for improved corrosion resistance and processability. Aluminum alloys are sensitive to overheating and the heating temperature must be strictly controlled.