METHOD FOR OBTAINING WEAR-RESISTANT SURFACE OF METALS AND THEIR ALLOYS (VERSIONS) Russian patent published in 2012 - IPC C21D1/09 C23C24/08 B23K26/00 

FIELD: metallurgy.

SUBSTANCE: according to the first version, the method involves formation of near-surface laser plasma in metal vapours in continuous optical discharge. Near-surface plasma is formed at least with one alloy element or elements; power density of laser radiation W_p is determined from the following condition: where - power density of laser radiation, which leads to surface melt, - power density of laser radiation, which leads to formation of erosion plasma and destruction of the surface, and together with laser plasma the treated surface is treated with ultrasound. According to the second version, the surface is treated with ultrasound in addition to laser plasma. Either carbon or nitrogen or boron or chrome is used as alloy element or elements.

EFFECT: obtaining high disperse coating structure, reducing the level of stress-deformation condition of surface layer, which leads to obtaining highly wear-resistant surface.

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