FEATURES OF FRICTION BEHAVIOR OF STEELS IN COUPLING WITH PEO-LAYERS, SYNTHESIZED ON LIGHT ALLOYS

The tribological behavior of 45 steel and Ó8 steel in coupling with oxide-ceramic layers (PEO-layers) synthesized by plasma-electrolyte synthesis on AMG-6 and D16T light alloys in mineral oil I-20 with the addition of distilled water and aqueous solution of glycerin have been investigated. The difference in the frictional behavior of PEO layers synthesized on aluminum alloys with a high content of magnesium (AMg-6) and with high copper content (D16T) in contact with steel counterbody was found. In the case of contacting the PEO layer synthesized on the AMg-6 alloy with the investigated steels, an oxide layer of the spinel type is synthesized on the steel surface - with the general formula FeAl2O4, as a result of the flow of tribochemical reactions in the contact area. This oxide layer protects steels from wear under the influence of hydrogen, but to loads that do not exceed 4 MPa. In the case of contacting the PEO layer synthesized on D16T alloy, there is a non-oxidizing wear of steel counterbodies and such contact pair is operable under load higher 10 MPa with low frictional heating temperature.