FIELD: mining.
SUBSTANCE: drill bit reinforced with diamond cutting elements comprises a housing with cutting elements forming interblade spaces and with diamond cutting elements mounted thereon and a protective coating with electrochemical deposition on all working surfaces of the drill bit containing diamond microparticles and nanodiamond particles distributed between diamond microparticles. The protective coating contains 1-28 microns diamond microparticles in amount of 5.0-25.0% by volume, nanodiamond particles in amount of 2.0-5.0% by volume, the rest is metal.
EFFECT: increased wear and corrosion resistance of the bit, reduced surface friction factor, reducing or preventing the packing.
5 cl, 3 dwg
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