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. Multi-layer coating is applied. First, the lower layer of titanium nitride and silicon is applied at the following ratio, wt%: titanium – 97.9–98.5, silicon – 1.5–2.1. Intermediate layer of nitride of titanium, silicon and niobium compound is further applied at the following ratio, wt%: titanium – 88.6–93.0, silicon – 1.0–1.4, niobium – 6.0–10.0. Then, an upper layer of titanium nitride is applied. Coating layers are applied with three cathodes located horizontally in one plane, the first one of which consists of titanium and silicon alloy, and the second one consists of titanium and niobium and is located opposite to the first one, and the third one is made of titanium and is located between them, lower layer is applied using the first and third cathodes, the intermediate layer is applied using all three cathodes, and the upper layer is applied using the third cathode.

EFFECT: result of application of the multi-layer coating is higher cutting efficiency.

1 cl, 1 tbl