Insight Into Sintering Mechanism And Optimization Of Fused Filament Fabrication Of H13 Tool Steel

Authors:

Jordan Lacorne (1,2,3), Aurélien Etiemble (2), Sandra Simon (2), Romain Faye (1), Xavier Boulnat (3), Eric Maire (3)

1- Nanoe SAS, Ballainvilliers, France

2- Université de Lyon, ECAM Lasalle, LabECAM, Lyon, France

3- Université de Lyon, INSA Lyon, MATEIS UMR CNRS 5510, Villeurbanne, France

Abstract:

In sinter-based additive manufacturing, such as metallic fused filament fabrication (mFFF), the sintering mechanism must be carefully understood and controlled to end up with the expected density, microstructure, and mechanical behaviour. In the case of mFFF of H13 tool steel, the considerations especially include carbon content, due to binder residue, porosity, and pore size, associated with the densification step, as well as martensitic and carbide formations. This work will discuss the influence of sintering parameters (temperature, ramp rate and atmosphere) on its mechanism, based on in situ shrinkage measurements and the characterization of green, brown and sintered parts. The outcome on the final composition, microstructure and hardness will be highlighted.

DOI:

https://doi.org/10.59499/EP246281354