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

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Abstract:

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.

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Periodical:

Key Engineering Materials (Volume 772)

Pages:

123-127

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.772.123

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Online since:

July 2018

Authors:

Fátima Ternero Fernández, Raquel Astacio, Francisco Gomez Cuevas*, Jesus Cintas, Juan Manuel Montes

Keywords:

Electrical Discharge, Electrical Resistance Sintering, Hardmetals

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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