METHOD OF MAKING MULTI-LAYER COAT FOR CUTTING TOOLS Russian patent published in 2006 - IPC C23C14/06 C23C14/48 

FIELD: application of wear-resistant coats on cutting tools; metalworking.

SUBSTANCE: proposed method includes vacuum plasma application of multi-layer coat: lower coat contains titanium and metal compound; intermediate layer contains titanium nitride or carbonitride and metal and upper layer contains material of intermediate layer alloyed by molybdenum; used as metal is aluminum, iron, chromium, zirconium or silicon; application of layers is performed by means of three cathodes located horizontally in one plane; two cathodes are located opposite each other and are made from titanium and metal; third cathode which is sectional in form is made from titanium and molybdenum.

EFFECT: increased serviceability of cutting tools; enhanced strength of adhesion of layers with base.

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