Structure of contact layer of steel (0.2% C) and electrical conductivity of contact in sliding against steel under alternative electric current with different turn ratio of current source | Izvestiya vuzov. Fizika. 2022. № 6. DOI: 10.17223/00213411/65/6/124

Structure of contact layer of steel (0.2% C) and electrical conductivity of contact in sliding against steel under alternative electric current with different turn ratio of current source

Dry sliding electrical contact of steel/steel with a current density higher 100 A/cm² was carried out according to the pin-on-disk interface scheme. Alternatin1g current was brought into contact using the transformer with different turn ratio k . It has been found that the contact exhibits quite satisfactory wear resistance and electrical conductivity in the case of sliding with a higher turn ratio. The supply of current to the contact from the power winding with a large number of turns (low k) led to a decrease in the electrical conductivity of the contact and its rapid deterioration. The morphological feature of the sample sliding surface was shown, realized in the formation of two sectors with different topography. The sliding surface sector directed towards the movement of the counterbody (front sector) was deformed and deteriorated due to the mechanism of adhesion and plowing. The other sector was deformed by a viscous fluid mechanism. These morphological details of the sliding surface were visible after sliding at different transformation coefficients. X-ray phase analysis found the formation of FeO and FCC iron in the surface layer of the sample.

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Keywords

turn ratio, structure and phase composition of the surface layer, viscous plastic flow of the surface layer, deterioration and wear of the sliding surface, sliding electrical contact

Authors

Name	Organization	E-mail
Aleutdinova M.I.	Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences	aleut@ispms.ru
Kolybaev A.V.	Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences	kav@ispms.ru
Fadin V.V.	Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences	fvv@ispms.ru

Всего: 3

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