PROCEDURE FOR PRODUCTION OF MULTI-LAYER COATING FOR CUTTING TOOL Russian patent published in 2011 - IPC C23C14/24 C23C14/06 

FIELD: metallurgy.

SUBSTANCE: procedure for production of multi-layer coating for cutting tool consists in vacuum-plasma application of three-layer coating. Carbonitride of titanium and chromium is applied as a lower layer at pressure of acetylene of 7.5·10^-4 Pa and temperature 600°C in a chamber of installation. Same carbonitride alloyed with silicon is applied as an intermediate layer at pressure of acetylene of 7.5·10^-4 Pa and temperature 550°C in the chamber of the installation. Carbonitride of titanium and silicon is applied as an upper layer at pressure of acetylene of 4.3·10^-3 Pa and temperature 500°C in the chamber of the installation.

EFFECT: increased functionality of tool and upgraded quality of treatment.

2 cl, 1 tbl, 1 ex