HARD-FACING OF METAL ARTICLES TO PRODUCE NANOSTRUCTURED SURFACE LAYERS Russian patent published in 2014 - IPC C23C26/02 C21D1/09 B82Y30/00 

FIELD: metallurgy.

SUBSTANCE: nano-sized surface coating is produced by metal article surface processing by doping alloy in fine power form. Surface is irradiated with focused heat beam of high-energy quantum generator by displacing laser beam at spacing of 25 mcm and at power sufficient for point fusion of said alloy consisting of nano-composite systems. Doping alloy ply is fused in processed article. Then part surface is cooled by compressed airflow at 20°C and 8 kPa for crystallisation of doping alloy on metal surface for provision of extra adhesion between doing alloy and cooled surface without change in surface structure and with formation of alloying ply with nitride and/or carbide matrix of nano-composite structure. Note here that laser radiation power is defined by equation P=1*10^-2*V*C*T/L, where P is laser radiation power, W, 1*10^-2 - mathematical constant, V is beam displacement speed, mm/s, C is doping alloy capacity, J/K, T is alloy melting point, K, L - doping alloy depth, mm.

EFFECT: higher quality of surface coating, higher heat, corrosion and erosion resistance.

3 dwg, 1 ex