METHOD FOR OBTAINING MULTI-LAYERED COATING FOR CUTTING TOOL Russian patent published in 2012 - IPC C23C14/24 C23C14/06 

FIELD: metallurgy.

SUBSTANCE: method involves application of three-layered coating by means of vacuum arc method. At that, as bottom layer at pressure of acetylene in the chamber of 7.5·10^-4 Pa and temperature of 600°C there applied is titanium and zirconium carbonitride. As intermediate layer at pressure of acetylene in the chamber of 7.5·10^-4 Pa and temperature of 550°C there applied is the above carbonitride alloyed with aluminium. As top layer at pressure of acetylene in the chamber of 4.3·10^-3 Pa and temperature of 500°C there applied is titanium and aluminium carbonitride.

EFFECT: increasing operability of cutting tool and improving treatment quality.

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