METHOD FOR ADDITIVE MANUFACTURING OF MARAGING STEELS Russian patent published in 2023 - IPC B22F3/105 B33Y30/00 B33Y70/00 C22C33/02 C22C38/50 

FIELD: metallurgy.

SUBSTANCE: method for manufacturing a metal part from maraging steel powder by additive manufacturing. A method for manufacturing a part by additive manufacturing from a metal powder having a composition that includes the following elements, in wt.%: 6 ≤ Ni ≤ 14, 5 ≤ Cr ≤ 10, 0.5 ≤ Si ≤ 2.5, 0.5 ≤ Ti ≤ 2, C ≤ 0.04, and optionally containing 0.5 ≤ Cu ≤ 2, the rest is Fe and unavoidable impurities resulting from processing, wherein the metal powder has a microstructure comprising in area fractions of more than 98% of the martensitic and/or ferritic phase, the method comprising in the first stage forming a layer of metal powder on the substrate and in the second stage layer-by-layer formation of layers by melting at least a portion of the metal powder in an atmosphere consisting of an inert gas other than argon, or combinations of inert gases other than argon, or under a nitrogen atmosphere or a combination of inert gases other than argon and nitrogen.

EFFECT: parts have a high relative density.

6 cl, 1 tbl, 24 ex