During the forging process, the forging temperature needs to be kept within a certain range. When determining the initial forging temperature, we need to ensure that the billet will not overheat during heating and avoid overheating reaction as much as possible. The initial forging temperature of forgings shall be within the appropriate range, because the initial forging temperature of forgings will decrease with the increase of carbon content. When determining the final forging temperature, it is not only necessary to ensure that the forgings have sufficient hardness before forging, but also to ensure that the forgings can obtain good microstructure and properties. Therefore, the final forging temperature should not be too high. If the temperature is too high, the grain of the forging will become coarse, and problems will occur during cooling after forging. If the temperature is too low, it will not only lead to post work hardening of forgings, but also lead to local fracture of forgings. In addition, the temperature of the final forging shall not be too high. If the temperature is too high, the grain of the forging will become coarse, and problems will occur when the forging is cooled. If the temperature is too low, it will not only lead to post work hardening of forgings, but also lead to local fracture of forgings.
The temperature control of forging is an important work in forging process. The normal production and processing of forging can be guaranteed only if the forging is carried out at the specified temperature. Different initial forging temperature and final forging temperature will have different effects on forgings made of different materials. In order to obtain better forgings, attention shall be paid to the temperature when selecting the final forging temperature, so as not to cause damage to the forgings. Only by ensuring the plasticity of forgings during forging within this temperature range, can the forging process of forgings be carried out smoothly.