Research of tribological features of steel surface by creating mineral coatings

Journal of Engineering Science and Technology Review. 2018. Vol. 11. No. 6. P. 138–143.

Skazochkin A. V., Bondarenko G.G., Kislov S. V.

The work investigates some tribological parameters of the surfaces of friction pairs made of steel, with mineral layers. A  comparative study of the friction coefficient of 18CrNiMo7-6 steel specimens with and without a mineral coating is
performed. The lowest friction coefficient value was achieved for samples with mineral coating, without HFC hard
surfacing before creating a mineral layer, and it was approximately 15% lower in comparison with the samples with HFC hard surfacing, but without mineral coating. The friction coefficient in the temperature range of 30…140 0С, with
constant displacement speed of samples with mineral coatings is practically unchanged for every sample type, the
variation range does not exceed 0.02, as contrasted with the friction coefficient of the samples with hard surfacing, but
without mineral coating. The value of the coefficient of volumetric wear of an aluminum oxide toroid during rotation
with disks with some types of mineral coatings was at the level of detection limit (less than 1.2x10-9 mm3/Nm), which is significantly less than the coefficient of volume wear of a toroid during rotation with disks without coating (4-7)х10-8
mm3/Nm.

Keywords: wear resistance, mineral coating, износостойкость, минеральное покрытие, metal surface, металлическая поверхность