METHOD FOR PRODUCTION OF MULTI-LAYER COATING FOR CUTTING TOOL Russian patent published in 2019 - IPC C23C14/06 C23C14/22 C23C30/00 B23B27/14 

FIELD: metallurgy.

SUBSTANCE: present invention relates to methods of application of wear resistant coatings on a cutting tool and can be used in metalworking. Conduct a multi-layer coating. First put the bottom layer of titanium nitride and chromium at their ratio, wt%: titanium 83.5–86.5, chromium 13.5–16.5. Then put the intermediate layer of nitride compounds of titanium, chromium and niobium at their ratio, wt%: titanium 79.0–85.0, chromium 9.0–11.0, niobium 6.0–10.0. Next, put the top layer of titanium nitride. Application of the coating layers is carried out by three cathodes arranged horizontally in one plane, the first of which is made of titanium and chromium compound, the second is made of titanium and niobium and opposite to the first, and the third is made of titanium and is placed between them, lower layer is applied using the first and third cathodes, the intermediate layer using all three cathodes, and the upper layer using the third cathode.

EFFECT: result of application is higher cutting efficiency.

1 cl, 1 tbl