Medium-Frequency Electrical Resistance Sintering of Soft Magnetic Powder Metallurgy Iron Parts
Raquel Astacio,
Fátima Ternero,
Jesús Cintas,
Francisco G. Cuevas,
Juan Manuel Montes
Affiliations
Raquel Astacio
Engineering of Advanced Materials Group, Higher Technical School of Engineering, University of Sevilla, Avda. de los Descubrimientos s/n, 41092 Sevilla, Spain
Fátima Ternero
Engineering of Advanced Materials Group, Higher Technical School of Engineering, University of Sevilla, Avda. de los Descubrimientos s/n, 41092 Sevilla, Spain
Jesús Cintas
Engineering of Advanced Materials Group, Higher Technical School of Engineering, University of Sevilla, Avda. de los Descubrimientos s/n, 41092 Sevilla, Spain
Francisco G. Cuevas
Engineering of Advanced Materials Group, Higher Technical School of Engineering, University of Huelva, Avda. Tres de Marzo s/n, 21071 Huelva, Spain
Juan Manuel Montes
Engineering of Advanced Materials Group, Higher Technical School of Engineering, University of Sevilla, Avda. de los Descubrimientos s/n, 41092 Sevilla, Spain
The fabrication of soft magnetic Fe parts by the medium-frequency electrical resistance sintering (MF-ERS) technique is studied in this paper. This consolidation technique involves the simultaneous application to metallic powders of pressure and heat, the latter coming from the Joule effect of a low-voltage and high-intensity electric current. Commercially pure iron powder was used in the consolidation experiences. The porosity distribution, microhardness, electrical resistivity and hysteresis curves of the final compacts were determined and analysed. The results obtained were compared both with those of compacts consolidated by the conventional powder metallurgy (PM) route of cold pressing and vacuum furnace sintering, and with fully dense compacts obtained by double cycle of cold pressing and furnace sintering in hydrogen atmosphere.
