METHOD FOR ADDITIVE FORMATION OF AN ARTICLE WITH A COMBINED STRUCTURE FROM A HEAT-RESISTANT NICKEL ALLOY WITH HIGH-TEMPERATURE HEATING Russian patent published in 2024 - IPC B22F10/28 B22F3/105 B22F3/24 B33Y10/00 

FIELD: powder metallurgy.

SUBSTANCE: invention relates to production of articles from nickel alloys with controlled variable size, shape and crystallographic orientation of grains using additive technologies. It can be used in aviation and aerospace industries. Article is formed on a substrate from an alloy welded with a heat-resistant nickel alloy of the used powder. Prior to printing first part of part by lower heater, substrate is preheated, layer of applied powder is heated by means of upper heater in the form of infrared directed focused source in accordance with heating profile of layer of three-dimensional model. Layer-by-layer scanning is carried out at laser power 110 W. After printing the first part of the part, heat treatment is carried out at homogenization and stress relief temperature, and then, at temperature of not more than solvus temperature of the alloy with holding for at least 5 hours, and the part is cooled to room temperature in the additive manufacturing plant. After that, layer-by-layer growth of the second part is carried out on the first part of the part at laser power 320 W, at that, each layer is scanned by laser twice.

EFFECT: enabling formation of an article from a heat-resistant nickel alloy with a controlled structure and grain size in one process cycle and enlargement.

4 cl, 4 dwg, 1 ex