Medium-Frequency Electrical Resistance Sintering and Electrical Discharge Consolidation of Metallic Powders

Compacts of iron powders were prepared by medium-frequency electrical resistance sintering (MF-ERS) and electrical discharge consolidation (EDC). Structural and mechanical characterization was carried out in order to study the effect of the main processing parameters (current intensity and sintering...

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Bibliographic Details
Published in:Key engineering materials 2018-07, Vol.772, p.123-127
Main Authors: Fernández, Fátima Ternero, Montes, Juan Manuel, Astacio, Raquel, Cuevas, Francisco Gomez, Cintas, Jesus
Format: Article
Language:English
Subjects:
Electrical discharge consolidation
Metal powders
Resistance sintering
Sintering
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Summary:Compacts of iron powders were prepared by medium-frequency electrical resistance sintering (MF-ERS) and electrical discharge consolidation (EDC). Structural and mechanical characterization was carried out in order to study the effect of the main processing parameters (current intensity and sintering time in MF-ERS and voltage and capacity in EDC). The compact properties resulted to be quite sensitive to the consolidation method and parameters. Porosities around 8% and microhardness of about 120 HV were reached. It is concluded that the MF-ERS process can be a best option for the consolidation of cemented carbide composites with composition WC-6wt.%Co. MF-ERS compacts of this composite show a very low porosity and reasonable uniform microstructure, preserving the original ultrafine grain size and an adequate hardness with a very quick processing cycle of the order of one second.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.772.123