Résumé

Soft ferromagnetic parts have been produced by two sinter-based additive manufacturing techniques: Solvent on Granules 3D Printing (SG-3DP) and Material Extrusion (MEX). Fe2.7Si and Fe6.5Si powders were mixed with multicomponent binders, then shaped to granules. Different formulations suitable for SG-3DP and MEX respectively were processed. Square section toroids for magnetic measurements, test cubes and a rotor/stator prototype were printed. The green parts were debound under nitrogen and sintered under hydrogen atmosphere, in a single thermal cycle, using a retort furnace. The sintered parts were characterized by measurements of B‐H hysteresis cycles. The impurity contents of carbon and oxygen were measured by melt extraction. The performance of parts processed by both SG-3DP and MEX methods, was compared with literature values obtained from conventional powder metallurgy processes.

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