METHOD OF PRODUCING A WEAR-RESISTANT COATING OF A CUTTING TOOL Russian patent published in 2019 - IPC C23C14/14 C23C14/24 

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly, to application of nanostructured and wear-resistant coatings by ion-plasma sputtering on surface of cutting tools. Method of producing a wear-resistant nanostructured coating of a cutting tool involves depositing on the surface of a cutting tool a coating containing titanium, aluminum and niobium. Prior to application of coating, surface of cutting tool is subjected to ion-plasma etching in vacuum chamber by low-temperature argon plasma at pressure of 1–3 Pa, and after application – phase-forming thermal oxidative annealing at temperature of 550–650 °C for 1–2 hours. Application of coating is carried out by ion-plasma sputtering at pressure 1–3 Pa, current 100–150 mA to obtain coating with thickness of 100–300 mcm. Applied coating additionally contains vanadium and aluminum oxide with the following content of initial coating components, wt%: Al 5.5–6.5, V 7–8, Nb 2–4, Al₂O₃ 1–2, Ti is rest.

EFFECT: higher wear resistance, resistance to fatigue cracking of coating and resistance to corrosion destruction.

1 cl, 1 tbl, 3 ex