METHOD OF PRODUCING COATING Russian patent published in 2013 - IPC B23K20/08 C23C26/00 

FIELD: process engineering.

SUBSTANCE: invention may be used in production of power and chemical plants of higher heat resistance. Stack of nickel 1-1.2mm-thick plate and steel plate is welded by explosion. Welded two-layer stack is hot rolled at 900-950°C with reduction to nickel layer thickness making 0.3-0.5 of its initial thickness. This bimetallic workpiece and aluminium plate is welded by explosion at explosive detonation rate of 2000-2700 m/s. Height of explosive charge and welding gap between propelled aluminium plate and nickel layer of fixed bimetallic workpiece is selected to ensure collision rate of both of 420-500 m/s. Welded three-layer workpiece is subjected to heat treatment for formation of solid intermetallide diffusion interlayer between aluminium and nickel at 600-630°C for 1.5-7 h with air cooling that causes spontaneous separation of aluminium and nickel along intermetallide diffusion interlayer.

EFFECT: refractory coating with decreased susceptibility to crack formation at temperatures in oxidising gases of up to 1000°.

1 tbl, 3 ex