Abstract
The performed research involved a thorough analysis of the phenomena occurring at an early stage of performance of selected forging tools – stamps (up to 4000 manufactured forgings), used in the second hot forging operation of a lid-type forging, which made it possible to point to the hybrid layer with the highest wear resistance, in order to increase tool life. Three different coatings were applied: AlCrTiSiN, Cr/CrN and AlCrTiN. The coatings were tested on 19 tools, and 3 representatives for each coating were selected, followed by their through research analysis. In particular, the analysis concerned the manner of wear of the hybrid layers and their resistance to specific degradation mechanisms. Based on the performed studies, it was possible to select the most optimal hybrid layer, which allows one to improve tool life.The preliminary results showed that the best effects for the whole tool working surface were obtained for the Cr/CrN layer, characterizing in high adhesion as well as the lowest Young's modulus E and hardness. In the case of high tool forces and the related friction, the best results were obtained for the AlCrTiN coating, which, beside its good adhesion properties, also characterizes in the highest abrasive wear resistance.
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