Technology for Producing Fine Tungsten Carbide Powders

Abstract:

The article shows the advantage of electric arc synthesis and subsequent centrifugal spraying of tungsten carbide to obtain a high-quality highly dispersed powder. A tungsten electrode (anode) is fed to the surface of a rotating graphite electrode (cathode) until an electric arc occurs between the electrodes, and the cathode is made in the form of a ring. The angular speed of rotation of the annular graphite electrode is set in accordance with the calculated ratio, which provides fine-dispersed centrifugal atomization of the molten product particles. To prevent intense evaporation of tungsten and the formation of an excessive amount of fine particles, the power of the electric arc for melting the anode is limited to a set value.As a result, the uniformity of the powder increases and the dispersion of the particles of the main fraction decreases.

• Periodical: Materials Science Forum (Volume 1037)
• Pages: 111-118
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1037.111
• Online since: July 2021
• Authors: Konstantin M. Kolmakov, Alexander E. Zverovshchikov*
• Keywords: Angular Velocity, Electric Arc Dispersion, Particle Dispersion, Powder Uniformity

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