Abstract:
The growth in the application of the hot stamping process for automotive parts is directly related to the need to reduce weight combined with increased resistance of safety parts. Understanding the wear mechanisms to which hot stamping dies are subjected is of great importance. In this way, the present work proposes the analysis of the predominant mechanisms of wear in a die for hot stamping at the end of its life. The initial part of the failure analysis was carried out, with visual and microscopic analysis, hardness and residual stress measurements, preserving the die. It was found that the predominant failure mechanisms in the hot stamping die were adhesive wear and erosive wear. Furthermore, cracks are associated not only with wear, but also with mechanical stress. Finally, due to the characteristics of the application, overtempering may occur in the die and, consequently, a decrease in the wear resistance of the die in these regions.