Simulation of heat distribution in particles during micro field-activated sintering by considering electrical concentration and contact resistance

Zhao, Dan; Jie, Wang; Yang, Yi; Yang, Gang; Qin, Yi; Liu, Jian; Yin, Deqiang

doi:10.1051/matecconf/20152110004

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2018

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“…The direct use of electricity as a mean to sinter powders has been suggested numerous times, generally from an experimental viewpoint, but also in theoretical studies [1][2][3][4][5][6][7][8][9][10][11][12]. This paper describes the production of metallic parts by a novel modality of ERS, based on the use of medium-frequency (1000 Hz) electrical current (MF-ERS).…”

Section: Introductionmentioning

confidence: 99%

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

Fernández

Astacio

Cuevas

et al. 2018

KEM

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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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