METHOD OF HARD FACING OF METAL ITEMS Russian patent published in 2015 - IPC C23C14/00 C21D1/09 C23C26/00 B82Y30/00 

FIELD: machine building.

SUBSTANCE: method is performed by addition to the surface layers of the item the alloying chemical elements and by decreasing of size of the particles forming the surface layer during the item surface treatment by the pulse plasma streams with simultaneous action on the surface of the electric current pulses of the acoustic oscillations and magnetic field. To optimise the treatment process the treated surface is by a controlled method connected with the electric circuit by anode or cathode. Control of the connection polarisation is performed upon the combustion gas mixture addition to the plasma generating medium.

EFFECT: modification of chemical composition and structure of surface layer is performed for its hard facing and for improvement of other operation features.

6 cl, 1 tbl, 7 dwg