METHOD FOR PRODUCTION OF MULTI-LAYER COATING FOR CUTTING TOOL Russian patent published in 2016 - IPC C23C14/06 C23C14/24 C23C14/58 B23B27/14 

FIELD: technological processes.

SUBSTANCE: invention relates to methods of application of wear resistant coatings on cutting tool and can be used in machining. Lower layer of titanium nitride, intermediate layer of titanium and zirconium compound nitride at their ratio, wt%: titanium - 85.0-91.0, zirconium 9.0-15.0, and upper layer of titanium, zirconium and chromium compound nitride is applied at their ratio, wt%: titanium 78.0-86.0, zirconium 6.0-10.0, chromium 8.0-12.0. Coating layers are applied by three cathodes horizontally located in one plane. First cathode is made of titanium, second one is assembled from titanium and zirconium and located opposite to first one and third one is assembled from titanium and chromium and located between them. Then coating is treated with laser radiation with power density of 38…46 kW/cm².

EFFECT: higher crack resistance and strength of multi-layer coating, hence, higher cutting tool efficiency.

1 cl, 1 tbl