METHOD TO APPLY PROTECTIVE COATING ON PRODUCTS FROM STEEL OR TITANIUM Russian patent published in 2013 - IPC C23C28/00 C23C12/02 

FIELD: machine building.

SUBSTANCE: protected surface of parts is prepared, a sublayer is applied, and chemical-thermal treatment of parts is carried out. The sublayer is applied from silicon or powdery metals from a group of transition metals, or metals of chrome subgroup with the help of plasma sputtering. Chemical-thermal treatment of the sublayer is carried out in a powder-type layer containing an active powder mixture at the following ratio of reagents, wt %: ammonium chloride not more than 5, titanium or aluminium or nickel 39-50, aluminium oxide and/or titanium diboride 4-55, carbon or boron, or silicon, or silicon carbide - balance. Saturation of the sublayer with the active powder mixture is carried out under vacuum or in a protective medium from inert gas under thermal treatment for 1-4 hours at the temperature in the range of 800-1100°C.

EFFECT: improved quality of a coating due to its increased thermal resistance, chemical resistance and mechanical strength.

2 dwg, 2 tbl, 1 ex