PROCEDURE FOR SURFACE TREATMENT OF CUTTING TOOL Russian patent published in 2011 - IPC C23C14/06 C23C14/28 

FIELD: metallurgy.

SUBSTANCE: procedure consists in formation of ceramic coating with end layer k-Al₂O₃ or TiN, located on k-Al₂O₃ layer, or α-Al₂O₃, or TiN, located on α-Al₂O₃ layer. Ceramic coating is radiated with electron beam for instant melting at least part of end layer. The cutting tool with multi-layer ceramic coating contains layer of k-Al₂O₃ and the end layer α-Al₂O₃, also, layer α-Al₂O₃ is produced by transformation of part of the layer K-Al₂O₃ during radiation with electron beam.

EFFECT: reduced surface roughness and reduced resistance to cutting and adhesion to part, which facilitates longer service life of cutting tool.

16 cl, 5 dwg, 2 tbl