Improvement of Forging Tool Life by Hybrid Layers Combining Hardfacing and Nitriding Supported by Numerical Modelling of the Surface Layer
摘要
This article contains interesting results from numerical modelling of forging tool wear. It concerns tools with hybrid layers combining hardfacing and nitriding. These are original layers that significantly improve tool life in hot forging processes, which is also confirmed by the results presented here. The authors developed their own wear model based on the Archard model. The new model takes into account the hardness of the material in the surface layer that is given by hardfacing and by nitriding. In addition, it takes into account changes in hardness as a result of exploitation in hot forging processes. The results of the tests confirmed the model's consistency with experiment at a level of 70–90%.