METHOD FOR PRODUCING BIMETALS WITH ONE-SIDED OR TWO-SIDED CLADDING USING “COLD” GAS DYNAMIC SPRAYING (CGDS) Russian patent published in 2023 - IPC C23C24/04 C23C14/02 C23C14/16 C23C14/34 B32B15/00 

FIELD: material engineering.

SUBSTANCE: invention relates to the production of multilayer materials based on steel and “soft” metals, such as aluminum, copper, titanium, and can be used in mechanical engineering, instrumentation, power engineering, shipbuilding to increase the service life of mechanisms by increasing wear and corrosion resistance in aggressive environments. A method for producing bimetals with one-sided or two-sided cladding using “cold” gas-dynamic spraying (CGDS) includes preliminary preparation of the surface of a steel sheet with the formation of a juvenile surface and spraying an adhesive layer on it, followed by the creation of a cladding layer on it, while using two autonomously operating dispensers. The juvenile surface of the steel sheet is created by processing it with a ceramic fine powder of aluminum oxide with a fraction of 0.1-1.0 mcm from the dispenser 1 at a heterophase flow rate of 350-450 m/s, then together with the dispenser 1, the dispenser 2 is turned on with a metal powder consisting of a large, 5-50 mcm, and a fine fraction from 50 to 500 nm in a ratio of 10:1, and an adhesive layer with a thickness of 1.0-1.5 mm is applied. Next, the dispenser 1 is turned off and a cladding layer of the required thickness is sprayed from the dispenser 2 over the adhesive layer, and when spraying the powder mixture from the dispenser 2, the heterophase flow rate is increased to 450-500 m/s.

EFFECT: introduction of ultrafine particles in a given ratio makes it possible to obtain a cladding layer of dense packaging with a pore count of less than 0.5%.

1 cl, 3 dwg, 1 tbl, 1 ex