METHOD FOR MANUFACTURING PRODUCT FROM NICKEL ALLOYS WITH CONTROLLED VARIABLE STRUCTURE Russian patent published in 2023 - IPC B22F10/28 B22F3/105 B33Y10/00 

FIELD: additive technologies.

SUBSTANCE: invention relates to the production of products from heat-resistant nickel alloys with a given structure by selective laser melting. Heat-resistant nickel alloy powder with a particle size from 15 to 100 microns is loaded into a selective laser melting unit, the structure is modelled and the first and second zones of the workpiece with different orientations and grain sizes are identified. The platform is heated to a temperature of 1000°C and starting from the first zone, the workpiece is formed by single or double scanning. The first zone of the workpiece is formed with a distance between laser passes of 0.1 mm, a layer thickness of 0.05 mm, a scanning speed of 1200 mm/s and a laser power of 250 W. The second zone of the workpiece is formed at a distance between laser passes of 0.15-0.2 mm, a layer thickness of 0.05 mm, a scanning speed of 1000 mm/s and a laser power of 650-950 W.

EFFECT: it is possible to obtain a product with controlled variable structure and grain size in one technological cycle without seeding.

1 cl, 2 dwg, 2 tbl, 2 ex