CUTTING ELEMENTS OF DRILL BIT WITH FIXED CUTTERS CONTAINING HARD CUTTING PLATES MADE OF SYNTHETIC DIAMONDS FORMED BY CHEMICAL VAPOUR DEPOSITION

摘要

FIELD: mining engineering.;SUBSTANCE: method of forming a single crystal cutting element for the drill bit with fixed cutters includes transformation of graphite powder into diamond powder chemically precipitated from vapour phase (CVD); growing a plurality of CVD single crystal diamonds on a substrate, wherein said multiple CVD diamond single crystals are grown in orientation along a crystallographic plane, each CVD single crystal diamond of a plurality of CVD single crystal diamonds has a rectangular prismatic shape with sides width in the range from 10 to 20 um; removing at least a portion of the CVD single crystal diamonds from the substrate; transformation of the removed CVD single crystaldiamonds into powder of CVD single crystal diamonds; placing the powder of CVD single crystal diamonds and a tungsten carbide support element into a mould and thermomechanical treatment of the powder of CVD single crystal diamonds in a mould for forming a solid plate of CVD single crystal diamonds attached to the tungsten carbide support element.;EFFECT: increasing the strength of the resulting structure at high temperatures and pressures.;14 cl, 6 dwg