METHOD FOR LASER ALLOYING OF TOOL STEEL WITH BORON CARBIDE AND ALUMINUM POWDERS Russian patent published in 2022 - IPC C23C8/76 C23C12/02 B23K26/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, in particular, to the modification of the surface properties of metals and alloys with concentrated energy flows by processing saturating mixtures with a pulsed laser, which provides structures with high operational surface properties and can be used in mechanical engineering for surface hardening of machine parts and tools. A method for forming a wear- and corrosion-resistant coating on the surface of a tool steel product, which includes applying a paste-like composition of powders of alloying components with an adhesive to the surface of a tool steel product and irradiating it with a scanning pulsed laser beam. A pasty composition containing sodium fluoride and powders of alloying components of boron and aluminum carbide is applied to the surface of the product using BF-6 glue at a ratio, in wt.%: 78% B4C + 18% Al + 4% NaF, and the surface of the product is irradiated scanning pulsed laser beam, and during irradiation, laser melting is carried out with short-pulse laser radiation of the near infrared range with a power of 70 to 100 W with a pulse duration of not more than 100 ns.

EFFECT: formation of a wear- and corrosion-resistant protective layer with a thickness of 40 µm or more, containing iron borides and aluminides, is ensured.

1 cl, 4 dwg