New materials in mining engineering

During the extraction of minerals, various mining machines are used to excavate, load and transport the rock mass. During the operation of the equipment, the wear of its components increases and the executive bodies wear out. Due to the wear of the working surfaces of machine parts and equipment, the consumption of fuels and lubricants and electricity consumption increase. As a result, the technical and economic indicators of enterprises are decreasing, and the cost of finished products is increasing. To increase the wear resistance of the working surfaces of parts of mining machines and equipment, wear-resistant steels and cast irons, surfacings and coatings are used. Modern mining engineering demands requirements light weight, high specific strength, excellent heat resistance and corrosion resistance to the materials of parts. These requirements are met by composite metal-matrix materials that combine these properties. Particles of oxides, nitrides, borides and silicides are widely used as fillers. The methods of obtaining, structure and tribological properties of alumina-matrix particulate-filled composite materials are considered. The wear resistance of materials increased with an increase in the concentration of filler particles in the matrix. The wear intensity and wear coefficient decreased with increasing time and sliding distance, and increased with increasing applied load. The wear intensity and wear coefficient of the composites decreased in proportion to the content of filler particles compared to the aluminum matrix. Wear mechanisms are also considered.

Khazin M. L., Apakashev R. A. New materials in mining engineering. MIAB. Mining Inf. Anal. Bull. 2023;(12-1):149—163. [In Russ]. DOI: 10.25018/0236_1493_2023_121_0_149.

Khazin M. L., Dr. Sci. (Eng.), Professor, ORCID iD: 0000-0002-6081-4474, Ural State Mining University, Ekaterinburg, Russia, 620144, e-mail: Khasin@ursmu.ru;
Apakashev R. A., Dr. Sci. (Chem.), Professor, vice-rector for scientific work, ORCID iD 0000-0002-9006-3667, Ural State Mining University, Ekaterinburg, Russia, 620144, e-mail: parknedra@yandex.com.

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