Development, production, and research of a charge for the production of hard alloys based on Tungsten carbides bonded with Cobalt

Purpose. Development, preparation and research of a charge for the production of hard alloys of the W-Co system using powders obtained by electroerosion dispersion of secondary raw materials of tungsten and cobalt in a carboncontaining working medium.

Methods. The components of the electroerosion charge of a hard alloy were obtained by the method of electroerosion dispersion in a Carbon-containing medium of aviation kerosene TS-1.

The microstructure of the obtained powder particles was studied using scanning electron microscopy. The granulometric characteristics of the charge were determined using a particle size analyzer. The composition of the elements in the powder was analyzed by energy dispersive X-ray spectroscopy based on a scanning electron microscope, and the phase composition was determined using X-ray diffraction using a diffractometer.

Results. The results of the development, production and complex investigation of a powder charge for the production of hard alloys of the W-Co system intended for use in machine–building and tool manufacturing are presented. The results of studies of the morphology, granulometric composition, and phase state of powders are presented. It has been experimentally established that powder particles are spherical and elliptical. The particles of tungsten carbide powder W2C range in size from 2.26 microns to 90.72 microns with an average volume diameter of 20.2 microns and contain carbon on the surface, while the particle sizes of cobalt powder are distributed in the range from 0.9 to 63.77 microns, with an average volume diameter of 12.06 microns.

Conclusion. The experimental data obtained create a scientific and practical basis for the development of fundamentally new solid alloys, which include powdered tungsten carbide and cobalt obtained from metal waste by electroerosion dispersion. The developed charge is characterized by a high degree of uniformity and can be used for subsequent pressing and sintering of hard alloys for instrumental purposes. The presented results open up the prospect of further improvement of the composition and regulation of the structure of newly formed alloys.

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