METHOD FOR MODIFYING SURFACE LAYER OF CUTTING PLATES MADE OF TOOL CERAMICS INTENDED FOR TURNING NICKEL ALLOYS Russian patent published in 2021 - IPC B23B27/00 B23P15/30 C23C14/58 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to mechanical engineering, it can be used at the final stage of manufacturing cutting ceramic plates made of aluminum-silicon oxynitride to ensure their increased wear resistance during turning of heat-resistant nickel alloys used in the aviation industry. The method involves the precipitation on the contact surfaces of the plate of a two-layer diamond-like coating consisting of an adhesive sublayer (CrAlSi)N with a thickness of 2.5 mcm, formed by vacuum-arc evaporation of Cr and AlSi cathodes in a gas mixture of nitrogen and argon, and an outer diamond-like layer with a thickness of 2.5 mcm, formed by plasma-chemical gas-phase precipitation in a glow discharge plasma by chemical reaction and decomposition of the components of the gas mixture of acetylene C₂H₂, argon Ar and tetramethylsilane Si(CH₃)₄. After that, by means of selective melting and evaporation of the front surface sections, a micro-relief is formed in the form of a group of micro-holes of given sizes, designed to accommodate and retain a lubricant based on molybdenum disulfide.

EFFECT: wear resistance of the cutting plates is increased when processing with increased feed rates and the surface roughness of the workpiece is reduced.

1 cl, 1 tbl, 9 dwg