Forging shape is one of the two major components of forging (forging and stamping) by using a forging machine to apply pressure to a metal blank to plastically deform it to obtain a forging having certain mechanical properties, a certain shape and size.
Forging can eliminate defects such as as-cast looseness caused by metal in the smelting process, optimize the microstructure, and at the same time, the mechanical properties of the forgings are generally superior to those of the same materials due to the preservation of the complete metal flow lines. For important parts of the relevant machinery with high load and severe working conditions, forgings are often used except for the available rolled sheets, profiles or welded parts.
According to the forging temperature, it can be divided into hot forging, warm forging and cold forging.
The initial recrystallization temperature of the steel is about 727 °C, but 800 °C is generally used as the dividing line. Above 800 ° C is hot forging; between 300 and 800 °C is called warm forging or semi-hot forging, and forging at room temperature is called cold forging. Forgings used in most industries are hot forging, warm forging and cold forging are mainly used for forging of parts such as automobiles and general machinery. Warm forging and cold forging can effectively save materials.