METHOD OF PRODUCTION OF MULTI-LAYER COAT FOR CUTTING TOOLS Russian patent published in 2007 - IPC C23C14/06 C23C14/24 B23B27/14 

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

SUBSTANCE: multi-layer coat is applied on working surfaces of cutting tools by vacuum-plasma method. Layers are applied with the aid of three cathodes located horizontally in one plane. Two opposite cathodes are made from titanium and sectionalized cathode located between them is made from titanium and zirconium. Lower layer containing titanium nitride is applied at temperature of 620°C±10°C and upper layer containing titanium nitride and zirconium is applied at temperature of 550°C±10°C.

EFFECT: increased service life of cutting tools; improved quality of treatment.

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