METHOD OF PRODUCTION OF MULTY LAYER COVER FOR CUTTING INSTRUMENT Russian patent published in 2008 - IPC C23C14/06 C23C14/16 C23C14/34 B23B27/14 

FIELD: production methods.

SUBSTANCE: to the working surface of cutting instrument using the vacuum-plasma method is brought the double layer cover. As the lower layer it is brought nitride of titanium, silicium and aluminium, contains 9-10% of aluminium, as the upper layeris is brought the nitride of titanium, silicium and aluminium, contains 6.3-7.0% of aluminium. The application of the cover is done by three situated in horizontal plane evaporator, two of which are opposite evaporator contain titanium and silicium, and situated between them evaporator contains titanium and aluminium. During the application of the upper layer it is used all three cathodes, and during application of the lower layer it is used one of cathodes, that which contains silicium is not used.

EFFECT: it is exceeded the work capability of cutting instrument and the quality of processing.

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