METHOD OF HARD FACING OF METAL PART Russian patent published in 2015 - IPC C23C26/00 B23P6/00 

FIELD: machine building.

SUBSTANCE: invention relates to machine building, namely to hard facing of the part surface layer, and can be used to manufacture machine parts out of ferrous and non-ferrous alloys by cutting methods. Lubricating-cooling liquid is prepared by preparation of semi-finished product of the lubricating-cooling liquid containing the following components in wt %: surface-active substance - 0.5-1.0, mineral oil - 1.0-3.0, distilled water - rest, aeration of said semi-finished product by multi-jet radial flow of the compressed air, addition to it of the nanopowder of the hard facing metal by means of the tangential jet of the compressed air with simultaneous agitation of the said semi-finished product of the lubricating-cooling liquid and nanopowder of the hard-facing powder with the obtained mixture turbulence. Then the said mixture obtained as liquid flow is subjected to the hydrodynamic cavitation treatment by constriction of this liquid flow with creation of the cavitation bubbles in the liquid volume. Nanoparticles are implemented in the part surface by the nanoparticles delivery from the bubbles surface in the microcracks and dislocation of the hard faced part surface upon "collapse" of the said bubbles. The implantation process is performed at concentration of the cavitation bubbles in the lubricating-cooling liquid within range 45-60 vol %.

EFFECT: high mechanical and operation properties of parts are provided in combination with simplification of the process, increasing of its capacity and reduction of the prime cost of parts manufacturing.

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