For forgings, the material is one of the factors that affect their malleability. Generally speaking, pure metal is superior to alloy, and alloy steel is superior to high carbon high alloy steel. Organized use of metal forgings. The ductility of forging is very poor for individual microstructure than for columnar structure, coarse grain structure, crystal boundary aggregation or eutectic structure of microstructure casting.
In addition, the processing conditions of the forging plant should also be considered. For example, the temperature of forged parts can increase the ductility of metal with the increase of temperature; Once the temperature is close to the melting point, it will cause combustion and forging, which will be greatly reduced.
And forging speed. On the one hand, with the increase of deformation speed, the recovery and recrystallization process is too late to eliminate work hardening, so the shape is reduced, the resistance is increased, and the ductility is poor. On the other hand, with the increase of deformation degree, the heat is the increase of plastic metal, the resistance is reduced, and the ductility is improved.
In addition, stress is also one of the factors that affect the forgeability of forgings. The higher and higher stress components require that forged materials be molded better, emphasizing the number of components and reducing the requirements for plastics.