METHOD OF PRODUCING MULTI-LAYER COAT FOR CUTTING TOOLS 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 coats. The lower layer of titanium, zirconium and aluminium nitride or carbonitride compounds is applied in proportion that follows, in wt %: titanium content makes 75.4 to 76.6, zirconium content makes 10.0 to 10.6, aluminium content makes 13.4 to 14.0. The intermediate layer of titanium, zirconium, silicon and aluminium nitride or carbonitride is applied in proportion that follows in wt %: titanium content makes 82.0 to 83.7, zirconium content makes 6.7 to 7.7, silicon content makes 0.7 to 1.0, aluminium content makes 8.9 to 9.3. The upper layer of titanium, zirconium and silicon nitride or carbonitride is applied in proportion that follows in wt %: titanium content makes 87.0 to 88.9, zirconium content makes 10.0 to 11.5, silicon content 1.1 to 1.5. 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 zirconium and arranged between the first and second cathodes.

EFFECT: higher operating properties of cutting tools.

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