The paper presents the results of a project aiming at investigating the potentiality of Die Wall Lubrication (DWL) in powder compaction. A DWL system was developed and installed on a 200 T hydraulic press and specimens were produced to investigate mechanical properties, dimensional and geometrical precision after sintering at high temperature. DWL increases density, while the effect on pore size and morphology in the sintered parts is negligible. Tensile strength and elongation of the sintered specimens are noticeably increased with reference to specimens produced with Bulk Lubrication (BL), while the positive effect on the bending fatigue resistance is less pronounced. Tooth root fatigue resistance of low pressure carburized gears is 71% of that of wrought 20MnCr5 carburized gears. Dimensional and geometrical precision of the parts produced with DWL is very good, comparable if not better than that typical of the parts produced with BL..

Die Wall Lubrication vs. Bulk Lubrication: microstructure, mechanical properties and dimensional and geometrical precision of low alloyed steels / Toledo Dos Santos, Daniel; Zadra, Mario; Girardini, Luca; Albonetti, Pietro; Bordin, Stefano; Libardi, Stefano; Cristofolini, Ilaria; Molinari, Alberto. - (2021). ((Intervento presentato al convegno EuroPM 2021 tenutosi a online nel 18th-22nd October 2021.

Die Wall Lubrication vs. Bulk Lubrication: microstructure, mechanical properties and dimensional and geometrical precision of low alloyed steels

Toledo Dos Santos, Daniel
Primo
;
Zadra, Mario
Secondo
;
Girardini, Luca;Libardi, Stefano;Cristofolini, Ilaria
Penultimo
;
Molinari, Alberto
Ultimo
2021-01-01

Abstract

The paper presents the results of a project aiming at investigating the potentiality of Die Wall Lubrication (DWL) in powder compaction. A DWL system was developed and installed on a 200 T hydraulic press and specimens were produced to investigate mechanical properties, dimensional and geometrical precision after sintering at high temperature. DWL increases density, while the effect on pore size and morphology in the sintered parts is negligible. Tensile strength and elongation of the sintered specimens are noticeably increased with reference to specimens produced with Bulk Lubrication (BL), while the positive effect on the bending fatigue resistance is less pronounced. Tooth root fatigue resistance of low pressure carburized gears is 71% of that of wrought 20MnCr5 carburized gears. Dimensional and geometrical precision of the parts produced with DWL is very good, comparable if not better than that typical of the parts produced with BL..
EuroPM 2021 Proceedings
Chantilly, France
EPMA
978-1-899072-54-5
Toledo Dos Santos, Daniel; Zadra, Mario; Girardini, Luca; Albonetti, Pietro; Bordin, Stefano; Libardi, Stefano; Cristofolini, Ilaria; Molinari, Alberto
Die Wall Lubrication vs. Bulk Lubrication: microstructure, mechanical properties and dimensional and geometrical precision of low alloyed steels / Toledo Dos Santos, Daniel; Zadra, Mario; Girardini, Luca; Albonetti, Pietro; Bordin, Stefano; Libardi, Stefano; Cristofolini, Ilaria; Molinari, Alberto. - (2021). ((Intervento presentato al convegno EuroPM 2021 tenutosi a online nel 18th-22nd October 2021.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/340654
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