According to the forging temperature, it can be divided into hot forging, warm forging and cold forging.
Hot forging technology is a precision forging technique that finds a suitable temperature above the recrystallization temperature as the processing temperature. However, compared with the warm precision forging technology, due to the higher temperature selected, it will undergo severe oxidation, resulting in poor surface quality of forgings and insufficient precision of forgings.
2. Warm precision forging
Warm forging technology is a precision forging technique that finds a suitable temperature below the recrystallization temperature as the processing temperature. When selecting the temperature, it is best to choose the best plastic deformation of the metal, and before the strong oxidation occurs.
3. Cold precision forging
Forging metal materials without heating, called cold forging, mainly has two techniques of cold extrusion and cold extrusion. Compared with other processes, it has the advantage that the shape of the workpiece is easy to grasp, and there is no deformation due to high temperature. The disadvantage is that the impedance during the deformation process is large, and the plasticity of the workpiece is poor.