Authors:
Marco Zago (1), Alex Rambelli (2), Davide Foschi (2), Ilaria Cristofolini (1)
1- University of Trento – Trento, Italy
2- Powder Metal B.U. – Sacmi Imola s.c. – Imola, Italy
Abstract:
Previous studies have systematically investigated densification in ring-shaped parts. Additionally, the effect of filling parameters on filling and green density was explored, demonstrating the strong influence of the die cavity on the origin of inhomogeneous powder distribution. A uniform density is mandatory for industrial production, so further investigation is necessary, also including the contribution of powder transfer.
This work aims at investigating the effect of powder transfer on the density distribution and the geometrical precision in 2-level axi-symmetric parts. Sample geometry was compacted by varying: the filling parameters, powder transfer strategies, and compaction forces. Reference samples were produced by excluding the powder transfer step from the compaction cycle. Green and sintered density distribution were derived, highlighting the effect of filling, powder transfer, and compaction strategies.
DOI:
https://doi.org/10.59499/EP235764659