METHOD FOR OBTAINING A FUNCTIONALLY-GRADED COATING BASED ON THE Ni-Cr-Mo-TiB SYSTEM Russian patent published in 2023 - IPC C22C19/05 C23C24/04 C23C14/16 C23C14/34 

FIELD: micrometallurgy.

SUBSTANCE: invention relates to the production of coatings of the Ni-Cr-Mo-TiB₂ system obtained by the method of heterophase transfer. The method for obtaining a functionally-graded coating based on the Ni-Cr-Mo-TiB₂ system includes applying dispersed particles to the surface of the product by supersonic gas-dynamic cold spray using three autonomous dispensers, while pure nickel Ni powder with a fraction of 20-40 mcm is placed in the first dispenser, powder of Ni₄₀Cr₁₈Mo₄₂ alloy with a fraction of 40-50 mcm is placed in the second dispenser and nanosized powder of titanium diboride TiB₂ with a fraction of 80-120 nm is placed in the third dispenser, after which a functional gradient coating is deposited using a computer program, according to which the nickel adhesive sublayer is sprayed from the first dispenser, then the first dispenser is turned off and the second and third dispensers are turned on, Ni₄₀Cr₁₈Mo₄₂ powder is fed from the second dispenser with a maximum consumption of 100% and from the third dispenser with a minimum consumption of TiB₂, then, according to a linear law, the amount of powder from the second dispenser is reduced, and from the third dispenser is increased to obtain a coating of TiB₂.

EFFECT: functionally-graded coating based on the Ni-Cr-Mo-TiB₂ system with a high microhardness of 28.8-30 GPa, wear resistance from 0.6 10^-9 up to 0.9·10^-9, corrosion resistance less than 0.001 mm/year and adhesion 64-73 MPa.

1 cl, 2 ex