Material-technological Modelling of C45 Steel Die Forgings

Material-technological modelling is based on thermo-mechanical treatment of a small amount of real material using a thermomechanical simulator. This is a procedure allowing quick and accurate changes to selected parameters of the thermomechanical treatment. Due to the high dynamics of the process, material-technological models and forming technologies with high strain rates and with steep gradients in temperature changes can be designed using this method. The current state of technology also allows the use of this method for die forging.The paper is focused on the issues of material-technological modelling of die forgings made from C45 and the possibility of its application to designing changes and optimization of forming and heat treatment technology. The first phase of the solution is the creation of a material-technological model for a real forging. The objective of this phase was to achieve the desired agreement between the model and the real forging. In the second phase, this model was used to replace the conventionally processed material C45 by thermomechanical micro-alloyed steel 30MnVS6. The aim of the controlled cooling from the forging temperature was to achieve structures without heat treatment, which is currently a necessary part of the manufacturing process. Replacing conventional technology with controlled cooling results in a significant saving of production costs.