Hot die forging is a method of making metal parts by plastic deformation under high temperature and pressure. In this process, the flow behavior of metals plays a crucial role. The relationship between metal flow behavior and forging defects in hot die forging is discussed in this paper.
In the process of hot die forging, the metal is constrained by the die and the action of high temperature and high pressure, and the plastic deformation occurs. The flow behavior of metal refers to the flow direction and distribution of metal in the deformation process. The flow behavior of metal is affected by many factors, such as metal material, temperature, strain rate and mold design.
The relationship between metal flow behavior and forging defects
Uneven metal flow and forging defects: If the metal flows unevenly during hot die forging, forging defects may result. For example, the flow of metal is too fast or too slow, which may lead to insufficient or excess metal filling in some parts, forming defects such as cracks, folds or loosens.
Metal flow direction and forging defects: The direction of metal flow also affects the formation of forging defects. If the flow direction of the metal is not consistent with the mold design, it may lead to poor metal filling in the mold, resulting in defects. Therefore, reasonable control of metal flow direction is the key to reduce forging defects.
Control the flow behavior of metal to reduce forging defects
Optimize the mold design: By optimizing the mold design, the flow behavior of the metal can be reasonably guided. For example, the reasonable setting of the radius, slope and exhaust hole of the mold can reduce the flow resistance of the metal and promote the uniform flow of the metal.
Controlling process parameters: Controlling process parameters such as temperature, pressure and strain rate during hot die forging can affect the flow behavior of metals. Reasonable selection of process parameters is helpful to obtain good metal flow and reduce forging defects.
Use of advanced numerical simulation technology: With the help of numerical simulation technology, it is possible to predict the flow behavior of metals and potential forging defects during hot die forging. Through the analysis of the simulation results, the process parameters and mold design can be optimized to reduce the risk of forging defects.
Metal flow behavior in hot die forging is closely related to forging defects. By controlling the flow behavior of the metal, the forging defects can be reduced and the quality of the product can be improved. Optimizing mold design, controlling process parameters and using advanced numerical simulation technology are effective ways to control metal flow behavior. Further study and understanding of metal flow behavior will help to improve hot die forging process and product quality.
