METHOD FOR RESTORING MACHINE PARTS SURFACE FLAWS Russian patent published in 2007 - IPC B23P6/00 C23C14/40 B23K1/00 

FIELD: metallurgy, namely methods for repairing machine parts surface flaws, possibly restoration of machine parts of high alloy refractory steels and alloys having operation flaws such as air holes, dents, local worn zones of rubbing surfaces.

SUBSTANCE: method comprises steps of filling dressed flaw sites with melt powder material containing solder and filler at deposition of said material by means of argon micro-plasma; sealing applied material by depositing onto it refractory material layer with thickness 0.2 - 0.3 mm at temperature exceeding at least by 100°C melting temperature of filler; depositing aluminum oxide layer with thickness 0.1 - 02 mm as barrier layer preventing tinning of repaired part surface with solder; then performing high-temperature soldering in vacuum and also in gas-shield atmosphere; mechanically working part. Invention allows receive high quality soldered joints without changing shape of deposited material in all spatial positions of part during restoration at porosity of soldered joints no more than 1.5%.

EFFECT: possibility for receiving high quality soldered joints.

5 cl, 1 ex