The forging production process is centered on the plastic deformation of forgings and consists of a series of processing procedures. The working procedure before forging deformation mainly includes blanking and heating. In the blanking process, the blank is prepared according to the specifications and dimensions required for forging, and when necessary, the blank is derusted, surface defects are removed, oxidation prevention and lubrication are carried out. The heating process heats the original blank according to the heating temperature and production rhythm required for forging deformation. Forging deformation process is plastic deformation of blank on various forging equipment to meet the basic quality requirements inside and outside forgings. This process can include several processes. After forging deformation, forging deformation is followed by the cooling process of forgings. Then, in order to make up for the shortcomings of the previous process and make the forgings fully meet the requirements of the forged product drawings, a series of processes such as trimming and punching (forging die), heat treatment, correction, surface cleaning and so on are needed. Sometimes, cooling after forging is closely combined with heat treatment to obtain the specific structure and properties of forgings. Quality inspection should be carried out between each working procedure and before the forging leaves the factory. Inspection items include assembly shape and size, surface quality, metallographic structure and mechanical properties. , according to the requirements of semi-finished products and forgings between processes.

The essence of forging is to apply external force to the blank through tools or dies, and the blank absorbs mechanical energy, which leads to the change of internal stress state distribution and the displacement, deformation and flow of material particles. For hot forging, the billet absorbs heat energy because of heating, and the corresponding internal temperature distribution has also changed. Driven by force and heat energy, the appearance, shape, size, internal structure and performance of the blank change.

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