There are many plastic processing and forming methods for aluminum and aluminum alloys, and the classification standards are not uniform. At present, the most common classification is based on the temperature characteristics of the workpiece during processing and the stress-strain state of the workpiece during the deformation process.

1) Classification according to temperature characteristics during processing

Hot processing refers to the plastic forming process of aluminum and aluminum alloy ingots above the recrystallization temperature. During hot processing, the plasticity of the ingot is high and the deformation resistance is low. Products with larger deformation can be produced with equipment with smaller tonnage. In order to ensure the structural properties of the product, the heating temperature, deformation temperature and deformation speed, deformation degree, deformation end temperature and cooling rate after deformation of the workpiece should be strictly controlled. Common aluminum alloy hot processing methods include hot extrusion, hot rolling, hot forging, hot upsetting, liquid die forging, semi-solid forming, continuous casting and rolling, continuous casting and extrusion, etc.

2) Classification according to the stress-strain state during deformation