METHOD OF PRODUCING CUTTING TOOL MULTILAYER COAT Russian patent published in 2009 - IPC C23C14/06 C23C14/16 C23C14/34 B23B27/14 

FIELD: production processes.

SUBSTANCE: invention relates to methods of applying wear resistant coats onto cutting tools and can be used in metal working. The proposed method incorporates a vacuum-plasma spraying of a multi-layer coat. The lower layer of titanium, chromium and aluminium nitride or carbonitride compounds is applied in proportion that follows, in wt %: titanium content makes 75.0 to 77.0, chromium content makes 10.4 to 11.5, aluminium content makes 12.6 to 13.5. The intermediate layer of titanium, chromium and molybdenum nitride or carbonitride is applied in proportion that follows in wt %: titanium content makes 78.6 to 80.1, chromium content makes 6.9 to 7.6, molybdenum content makes 6.9 to 7.2, silicon content makes 0.7 to 1.0, aluminium content makes 8.9 to 9.3. The upper layer of titanium, chromium and molybdenum nitride or carbonitride is applied in proportion that follows in percent by weight: titanium content makes 81.5 to 82.7, chromium content makes 10.4 to 11.3, molybdenum content makes 6.9 to 7.2. The coat layers are applied by three cathodes arranged horizontally in one plane. The first cathode is made up of titanium and aluminium, the second one is made up of titanium and silicon alloy and arranged opposite the first one, while the third cathode is made up of titanium and chromium and arranged between the first and second cathodes.

EFFECT: higher efficiency of cutting tool.

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