IMPROVING FRETTING RESISTANCE OF MACHINE PARTS INTEGRATED VACUUM PLASMA TREATMENT

K.S. Selivanov, R.F. Galiakbarov

The possibility of improving fretting resistance of parts made of steel and titanium alloys combined vacuum-plasma treatment, which combines ion implantation and application of multi-layer coating system Ti-TiN. The results of the study microgeometry surface samples with different thickness of the coating after the fretting tests. These results confirm that the processing carried out securely protects contact surfaces from fretting wear. Chipping, peeling or signs of surface oxidation does not occur, the wear of the coating after the number of cycles taken by 2·10⁵ does not exceed the roughness. At the same time a significant reduction in fretting wear of titanium alloy samples (up to 8.5 times) compared to the original, non-reinforced condition, due to blocking of adhesive interaction surface of base material and prevent their "seizure."

Key words: wear, fretting, hardening, vacuum treatment.