RU2821638C1 - Method for additive formation of an article with a combined structure from a heat-resistant nickel alloy with high-temperature heating - Google Patents

Abstract

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

Description

The invention relates to the field of producing products from nickel alloys with controlled variable size, shape and crystallographic orientation of grains using additive manufacturing methods.

Heat-resistant nickel alloys are a highly sought-after material in the aviation and aerospace industries due to their chemical and corrosion resistance at elevated temperatures, high-temperature strength and good creep resistance. One of the main factors influencing the heat resistance characteristics of nickel alloys is the proportion and shape of strengthening inclusions of the γ'-phase in the structure. More heat-resistant alloys have a higher ratio of the γ'-phase to the main γ-matrix. This makes it possible to increase the alloy's resistance to creep and fracture at elevated temperatures, but complicates machining and reduces ductility at low temperatures.

The production of heat-resistant nickel alloys encounters a number of difficulties associated with the presence of refractory elements in the composition and the need to ensure high properties. To form a directional structure in such alloys, as a rule, the Bridgman method is widely used, according to which the melt is subjected to directional crystallization. In this case, a seed is used and conditions of variable temperature are provided in the shell, so that the melt moves along a given direction of microstructure formation.

The production of heat-resistant components, such as gas turbine blades, in the traditional sense is carried out using foundry processes, and, in connection with this, encounters the emergence of such characteristic problems as the presence of segregations and structural inhomogeneities in castings and an increase in production waste. Foundry production limits the production of functional materials, including heat-resistant alloys, and controlled production of a certain type of microstructure is almost impossible. The activities of the scientific and engineering communities are currently largely aimed at the formation of a predominantly homogeneous microstructure represented by a single crystal.

The development of powder metallurgy methods has led to the emergence of new technologies for producing products from powder materials. One of these actively developing areas is additive technologies.

Among those applicable to the repair and production of directional microstructure of nickel alloys, selective laser melting (SLM) technology is noted, presented by a number of large manufacturers, such as Concept Laser, 3D Systems, SLM Solutions, etc. The use of this technology for the production of gas turbine components fills the need for the formation of complex geometric elements and reducing the number of technological operations, including those related to the preparation of expensive equipment. The laser additive manufacturing process is characterized by high cooling rates, creating nonequilibrium conditions for the crystallization of the melt pool formed during the high-temperature exposure process.

Existing research and patent publications describe a number of solutions aimed at reducing steep temperature gradients and providing directional microstructure.

The combination of heating sources, namely a heating element located under the surface of the build platform, then an infrared heater located above the first layer and scanning with a laser beam, used in the additive manufacturing process, is described in the application RU 2020100045. Additive manufacturing technology for powder material from dispersion-hardening superalloys, such as a nickel-based superalloy, involves heating a powder deposited on a build platform to a temperature of 65-70% of the liquidus temperature of the precipitation-hardening superalloy, and then selectively scanning, using an energy beam device, areas of the surface of the first layer to melt or sinter selectively scanned areas.

With the above layer-by-layer selective laser melting method and apparatus, it is possible to strictly control the temperature gradient in the melt pool from top to bottom, reduce or even eliminate mixed crystals, and realize layer-by-layer stable epitaxial growth of oriented crystals or single crystals along the [001] direction. Despite the above advantages, the specified heating power of an infrared lamp is insufficient to control the temperature gradient in the melt bath, eliminate possible defects in the form of cracks and the occurrence of residual stresses. In addition, annealing of the part is carried out in additional equipment, which requires additional time and production costs.

An application for a method for preparing a hot crack sensitive material for laser additive manufacturing based on assisted infrared preheating CN 114871450 was filed with NANJING UNIVERSITY OF AERONAUTICS. According to the method, in the process of laser additive manufacturing of materials such as alloys based on aluminum, tungsten and nickel, an infrared heat source is used to preheat the deposited layer of powder, which is carried out before the stage of laser processing of the layer, which makes it possible to reduce the temperature gradient of the molten pool and prolong curing time so that the thermal stress concentration is reduced. For production from nickel alloys with a composition of Cr 21.3-22.5 wt. %, Fe 17.8-18.6 wt. %, Mo 8.4-9.2 wt. %, W 5.6-6.2 wt. %, Co 1.0-1.6 wt. %. %, the rest - Ni; The particle size of nickel-based alloy powder is 20-47 microns. The example presented includes the use of an SLM-150 apparatus, wherein the preheating temperature of the auxiliary heating device of the infrared heat source for nickel-based alloy powder is controlled at 400-500°C; Selective laser melting molding is carried out by setting laser power 300-450 W, laser scanning speed 1000-1400 mm/s, scanning interval 50 μm, powder layer thickness 50 μm and scanning strategy using a divided island pattern.

The presented methods can be used to produce a certain class of nickel alloys, in which the determining factor for providing a set of unique strength properties is the release of the strengthening γ'-phase. The main condition for its isolation and formation of the required uniformity and shape of inclusions is to ensure the temperature regime in a certain range. This range is below the solvus temperature, and in it the γ'-phase can separate. The most optimal temperatures for the precipitation of such phases are determined by the phase diagram of the alloy.

There is a method in which the possibility of creating a combined structure within a single product is realized, and, in fact, can be used to repair products that are part of the compressor, combustion chamber or turbine section of a gas turbine. To do this, a so-called preform, characterized by a single-crystalline (SX) structure, is prepared in advance, positioned in an additive manufacturing installation, the surface of the preform is leveled and trimmed for further layer-by-layer formation with controlled grain orientation in the primary and secondary directions, according to a given scanning pattern with an energy beam in accordance with the intended design of the component or with the known principal crystallographic directions of the preform providing local loading conditions for the specified component.

US Pat. No. 10569362 from General Electric Corporation presents a method for manufacturing an element with a single crystal structure, including: placing a seed crystal on a substrate, aligning the crystal with the substrate in height; applying metal powder to the work surface; directing the laser beam to melt the powder in a pattern corresponding to the cross-sectional layer of the element; repeating the stages of applying the powder and melting it to create an element in a layer-by-layer manner; during the deposition and melting cycle, maintaining a specified temperature profile of the element using an external temperature control device separate from the laser, so that the resulting element has a directional or single-crystalline microstructure. The specified temperature profile is maintained by a set of heating devices, one of which can be a resistive heater for heating the forming well, and for upper heating of the manufactured product and control of solidification during re-melting of the laser layer, it is proposed to use a quartz lamp or an induction coil, extended in both during laser processing of the layer , and alternately, which provides fairly flexible control of the process of formation of the required microstructure.

Despite the possibility of providing more favorable conditions for the formation of a directional microcrystalline structure using these heating devices, to obtain a directional structure, the method uses a substrate with a predetermined structure.

Application CN 112893874 filed by HUAZHONG UNIVERSITY OF SCIENCE & TECHNOLOGY describes a method for forming directional and monocrystalline structures in products using additive technology. For this purpose, infrared heating of the layer surface is used, located in the upper part of the installation, with the help of which the layer is heated and maintained at the required temperature during laser processing and subsequent crystallization. Growing is carried out on a single-crystalline substrate made of the same material as the powder, mounted on a cooled platform, with cooling tubes with various coolants passed through (liquid nitrogen, water, etc.), while the heating temperature with an infrared emitter is 50-500 ° C, and the cooling temperature is -196-0°C. The method includes the principle of re-melting and eliminating equiaxed mixed crystals that may appear at the edges of the track, as well as providing a temperature field with a strictly and gradually decreasing temperature, so that the crystallites grow in the opposite direction to the gradually decreasing temperature as the molten pool solidifies. The 3D printing method includes the following steps:

- Creating a three-dimensional model of the part being formed, grinding and cleaning the form-forming surface of the single-crystal substrate with sandpaper;

- Fixing the monocrystalline substrate on the surface of the cooling substrate, and adding dried metal powder to the molding unit, and purging the molding chamber with shielding gas until the oxygen content is below 100 ppm;

- Incorporation of a temperature control unit to monitor the temperature during the part forming process, so that the pyrometer and thermocouple detect the temperature of the powder, melt pool and substrate in real time;

- Separation of the formed part from the single crystal substrate by linear cutting, removal of residual metal powder on the surface of the part and annealing to relieve stress and eliminate possible recrystallization when the part is in service, removing the layer of mixed crystals from the surface of the part using a grinding wheel or sandblasting machine.

The method that best characterizes the state of the art, aimed at producing gas turbine engine components from nickel alloys with a pronounced formation of the γ-phase, was selected as a prototype and is presented in patent EP 3241634. The method for forming a component with a directional or monocrystalline microstructure includes the following steps:

1. Prepare a model of the turbine part;

2. Take a nickel alloy powder containing a γ-phase with the release of a Ni3Al solid solution;

3. The powder is applied to the seed crystal substrate with a certain specified orientation;

4. Melt or sinter a layer of powder using laser radiation in accordance with the cross-section of the model;

5. The formed layer is re-scanned at a temperature above the liquidus so that the microstructure of the formed layer matches the orientation of the substrate;

6. Additionally, the formed layer is scanned at a temperature below the solvus for 1-3 seconds in order to isolate a solid solution in the previously formed γ-phase;

7. Apply a new layer of powder and repeat the above steps until the formation of the part is completed;

8. The part obtained by the additive method is processed using hot isostatic pressing at subsolvus temperature, in particular, at a temperature from 1000°C to 1280°C, a pressure of 6.9-172.5 MPa from 1 to 10 hours;

9. Vibration, abrasive blasting or chemical treatment of one or more external or internal surfaces is carried out, removing up to 30 microns of material;

10. Apply coating to the surface of the part.

A feature of the method is the possibility of forming a primary orientation of the crystal, orthogonal to the construction plane or direction [001], as well as a secondary one, which is orthogonal to the primary orientation and corresponds to the second direction [100] of the crystal lattice of the seed crystal, so that the formed object can have both primary and secondary orientation . Thus, when processing the powder, the layer acquires a monocrystalline structure, characterized by the presence of both primary and secondary directions.

The advantages of the method are the formation of a solid solution directly during the layer-by-layer growth process, and not upon its completion, and the ability to control the formation of the γ-phase, the release of the γ'-phase (Ni3Al), as well as its growth due to repeated scanning at a temperature below the solvus temperature γ' -phases.

However, the method does not present approaches that make it possible to ensure secondary orientation, as well as the presence of both primary and secondary orientation of the crystal structure in a part containing a different proportion of the γ'-phase, in particular, laser pre-treatment to reduce the temperature gradient is not capable of to fully ensure equilibrium conditions for the formation of directional grains (crystallites) due to the occurrence of Marangoni stresses in the melt bath; this requires the use of additional methods of reducing the temperature gradient in the material. In addition, to implement the method, it is necessary to preliminary prepare a seed crystal with the required direction of the microstructure, which increases the time and material costs of production.

The presented methods do not allow selectively creating areas with an equiaxial and directional structure using additive technologies, as a result of which it is impossible to produce a product from a nickel alloy with areas having a structure that provides local increased mechanical properties at low temperatures. For example, for the locking part of a turbine blade operating at lower temperatures compared to the feather part operating at elevated temperatures.

In addition, the thermal heating used in a number of the listed known solutions to reduce the temperature gradient is often low and reaches 500°C, while heat-resistant nickel alloys require heating above 1000°C to minimize the occurrence of residual stresses and cracks and eliminate the need in carrying out additional heat treatment aimed at relieving stress.

Thus, the above methods do not fully offer a solution to such a technical problem as the efficient and productive formation of products from a heat-resistant nickel alloy with a controlled combined microstructure with the possibility of reducing the number of technological operations.

In order to solve the above problem, it is proposed to implement a method for the additive formation of a product with a combined structure made of a heat-resistant nickel alloy using additive manufacturing technology, including the possibility of using additional heating sources during laser processing of the layer, and including the stages of preparing a three-dimensional model of the part being manufactured, dividing the three-dimensional model into at least two parts, characterized by different types of structures and different loading characteristics, preheating of the substrate and heating of the applied powder layer, according to which

- for the first part of the part, choose a laser power of 110 W, and for the second - 320 W; - select a support from an alloy welded with the alloy of the powder used;

- when printing the first part of the part, the heating temperature of the substrate is set, determined by the expression (T solidus + T solvus)/2 and

- before laser scanning, the layer of applied powder is heated using infrared directed focused sources in accordance with the heating profile corresponding to the layer of the three-dimensional model, the heating temperature is set in the temperature range limited by the solvus temperature and the solidus temperature of the alloy;

- repeat the operations until the first part of the product is grown layer-by-layer, the printing is stopped and, without removing it from the chamber, the first part of the product is subjected to heat treatment in the chamber of an additive manufacturing installation using upper and lower heaters, first at the temperature of homogenization and stress relief, then at a temperature not exceeding the solvus temperature with exposure for at least 5 hours to carry out the aging process;

- then the part is cooled to room temperature without removal from the additive manufacturing unit,

- after which, on the formed first part of the part, the next part of the part is grown layer-by-layer without the use of additional heating in such a way that each layer is scanned with a laser twice.

The technical result of the invention consists in the formation of a product from a heat-resistant nickel alloy with a combined structure in one technological cycle, including the stage of forming the first part of the product, namely the choice of laser power, the choice of a substrate from the alloy welded with the powder used and the heating temperature of the substrate in accordance with the solidus temperatures and solvus of the alloy, as well as carrying out, before scanning with an energy source, preheating the layer of applied powder using infrared directed focused sources until the first part of the product is completely grown and the resulting first part of the product is heat treated and cooled without removing it from the chamber of the additive manufacturing installation; and the stage of forming the second part of the product in an additive manufacturing installation without the use of additional heating, with each layer being scanned twice by an energy source.

Thus, the method of additively forming a product with a combined structure from a heat-resistant nickel alloy with high-temperature heating eliminates the stages of heat treatment using additional equipment and reduces the number of maintenance steps for a selective laser melting installation, including unloading and loading operations. In addition, it reduces production operations, increases productivity and simplifies the production of heat-resistant nickel alloy products with controlled structure and grain size.

A further description of the method is illustrated by the following accompanying drawings:

Fig. 1 - Block diagram of a method for manufacturing a product using additive manufacturing;

Fig. 2 - Optical image of the microstructure of the workpiece with a given structure in the first part of the product;

Fig. 3 - Optical image of the microstructure of the workpiece with a given structure in the second part of the product.

In more detail, the process of producing products from nickel heat-resistant alloys with a combined structure (Fig. 1) is as follows:

1. Prepare a three-dimensional model of the part, dividing it into at least two volumetric areas (parts) that differ in structure and required properties;

2. Printing parameters are selected in advance, such that the laser power for one part is 120 W, and for the second 320 W;

3. Take nickel alloy powder with a particle size of 5-63 microns, carry out input control for morphology and granulometric composition;

4. The powder is loaded into the hopper of the selective laser melting installation. In the hopper, the powder is heated to a temperature of 100-500°C using a resistive heater. Powder preheating is used to reduce temperature gradients when applying cooler powder to a hotter platform and to achieve a more uniform temperature distribution.

5. In the installation, a substrate made of an alloy weldable with the powder used is installed on the working piston. The substrate material must have a solidus temperature greater than the maximum heating temperature to prevent melting. In addition, the substrate material must provide sufficient fixation of the part and prevent it from moving when the layer is applied.

6. Provide oxygen content in the chamber of no more than 50 parts per million;

7. The substrate is heated to a temperature (T solidus + T solvus)/2°C using tungsten heaters;

8. A powder layer is applied to the substrate and heated from above to a temperature, the range of which is limited by the solvus and solidus temperatures, using focused infrared sources. Heating temperature is controlled using infrared pyrometers.

9. The powder layer is scanned with a laser using previously determined printing parameters;

10. The substrate is lowered to the thickness of the layer and steps 7-9 are repeated until the first part of the part is obtained.

11. The first part of the part is heated to a temperature (T solidus + T solvus)/2°C in a selective laser melting installation using upper and lower heaters, and kept at this temperature for at least 1 hour to homogenize and relieve stress. To control the temperature of the lower heater, a thermocouple located in close proximity to the platform was used, and a pyrometer was used to control the upper heater.

12. The part is heated to a temperature not higher than the solvus temperature in a selective laser melting installation using upper and lower heaters, and the part is kept for at least 5 hours to carry out the aging process.

13. The heaters are turned off and the first part of the part is cooled to room temperature.

14. After cooling the first part of the part, the second part of the part is manufactured layer by layer without additional heating using a previously determined scanning mode with a 320 W energy source. Scanning is performed twice with the same power. This ensures local heating of the surface layer, without heat penetrating deep into the part, but due to the fact that the rest of the part material is not heated, higher cooling rates during crystallization are ensured.

15. Upon completion of the manufacture of the second part of the part and the entire part as a whole, the part is removed from the installation and separated from the platform.

After manufacturing, the structure is checked using optical or electron scanning microscopy, X-ray diffractometry or other means of control, and, if necessary, printing modes are adjusted. In order to reduce porosity possible when implementing additive technology, hot isostatic pressing can be carried out. In addition, if necessary, the surface of the part is treated mechanically.

The final product can be components of a gas turbine engine, for example, a blade, nozzle and other segments of the combustion chamber and components included in the gas turbine engine.

The presented method provides certain strength properties corresponding to different types of loads in selected parts of the part manufactured by layer-by-layer growth. Preferably, the microstructures formed in different parts of the part are equiaxial, columnar and microcrystalline.

In addition, the method is suitable for the manufacture of gas turbine engine parts operating under increased loads under conditions of high tensile stresses, and provides increased strength properties in the zone of the directional structure at elevated temperatures, and in the zone of the equiaxial microstructure - greater strength at low temperatures.

The presented method eliminates the use of a seed substrate used to set a specific crystallographic direction, and the use of focused heating allows the additive formation process to be accelerated.

The main approach used in the method is to ensure maximum equilibrium conditions, allowing to control the rate and conditions of crystallization of the melt. Treatment with an energy source such as a laser or electron beam results in high cooling rates. Changing the crystallization rate is possible by heating both the substrate on which the product is grown layer-by-layer and the powder layer. Heating only the substrate leads to the fact that as the height of the product increases, the heating efficiency decreases, and the temperature gradient between the upper and lower layers increases, which can lead to the occurrence of structural defects and the release of the strengthening gamma phase from the zone.

Bottom heating of the substrate involves the use of a tungsten induction heater, with a maximum temperature of 1300°C and fast response. Bottom heating is used to preheat a pre-installed substrate, which may not have a given microstructure: equiaxed, columnar or single crystal, the required orientation and grain size are provided by selecting laser processing parameters, scanning strategy and heating conditions.

More suitable crystallization conditions in this case are provided by a combination of upper and lower heating, which reduces the sharp temperature drop. Top heating is preferably carried out continuously using infrared focused sources that allow the layer of powder to be processed over the cross section of the product, for example, a VCSEL system or a focused laser beam, etc. The processing temperature is selected in the solvus and solidus temperature range, since in this range only the γ phase is present, the alloy is the most ductile and stress relaxation occurs most effectively. For some well-known alloys (Inconel 625, Inconel 718, VZh159), this range is characterized by temperatures of 1050-1300°C. The aging temperatures that ensure the growth of strengthening precipitates of the γ'-phase are known, and for a number of alloys it is characterized by temperatures of 600-1000°C. The accuracy of heating by an infrared focused source is determined using infrared pyrometers.

The use of infrared focused sources allows minimizing powder sintering outside the cross-sectional area of the object, thereby facilitating the removal of excess powder material from the surface of the formed product. In addition, infrared heating with focused sources provides rapid heating, since the operating power output is significantly lower compared to, for example, resistive heaters. Cooling of infrared heaters after they are turned off also occurs much faster.

The effectiveness of the method is also ensured due to the certain dimensions of the melt pool when passing through the laser. The size of the melt pool is limited by the depth and width provided by a combination of scanning parameters, such as laser power, scanning speed and track width of no more than 100 µm. The track width is selected in such a way as to ensure overlap of the formed melt pools and complete fusion of the powder. In some cases, the laser power plays a decisive role, affecting the penetration of both the powder layer and the previous layer, so that the crystallographic orientation is inherited from layer to layer, while the microstructure of the substrate does not affect the formation of the structure in the product. The formation of the direction of the structure occurs due to high heating temperatures and the technological parameters used, and changing the parameters of the influence of the energy source leads to a controlled change in the size of the melt pools and the microstructure as a whole, providing a product with a combined microstructure.

Implementation example 1:

1. Nickel alloy powder was taken with the composition: Ni base; Cr - 4.9%; Co - 9.0; W - 8.5%; Al - 5.9; Re - 4.0%; Ta - 4.0%; Nb - 1.6%. Particle size 5-63 microns. The powder was loaded into a selective laser melting installation. In the hopper, the powder was heated to a temperature of 100°C using a resistive heater.

2. The part was divided into two parts, differing in structure and required properties.

3. Select the following print options:

a. First part of the part: laser power: 120 watts;

b. Second part of the part: laser power: 320 Watt;

The remaining parameters were fixed and for both parts they were: scanning speed: 1100 mm/s; layer thickness - 50 microns; the distance between individual laser passes is 100 microns.

4. In the installation, a substrate was installed on the working piston. To prepare the samples, a substrate made of VZh159 alloy was used.

5. The working chamber was purged with inert gas argon until the oxygen content was 50 ppm.

6. The substrate was heated to a temperature of 1280°C using tungsten heaters.

7. A powder layer 50 µm thick was applied to the substrate.

8. The applied powder layer was heated to a temperature of 1280°C from above using focused infrared sources. Using infrared pyrometers, it was determined that the heating temperature profile corresponded to the layer of the three-dimensional model.

9. Laser scanning of the powder layer was carried out according to previously determined printing parameters

10. Next, the substrate was lowered by 50 microns and steps 7-9 were repeated until the first part of the product was obtained.

11. Without removing it from the chamber, the first part of the part was heated to a temperature of 1280°C in a selective laser melting unit using upper and lower heaters, and kept at this temperature for 1 hour to homogenize and relieve stress. To control the temperature of the lower heater, a thermocouple located in close proximity to the platform was used, and a pyrometer was used to control the upper heater.

12. Then the part was heated to a temperature of 1000°C in a selective laser melting installation using upper and lower heaters, and the part was kept for 5 hours to carry out the aging process.

13. The heaters were turned off and the first part of the part was cooled to room temperature.

14. After cooling the first part of the part, the remaining part of the part was grown without additional heating. In this case, we used the scanning mode previously defined for the second part with a laser power of 320 W. Laser treatment was performed twice. This ensures local heating of the surface layer, but due to the fact that the rest of the material of the part is not heated, higher cooling rates during crystallization are ensured.

15. After complete growth of the entire part, the part was removed from the installation and separated from the platform. The microstructure in the first part of the product (Fig. 1) and in the second part (Fig. 2), including the transition zone (Fig. 3), was examined using optical microscopy.

Claims (4)

1. A method for the additive formation of a part with a combined structure made of a heat-resistant nickel alloy, including preparing a three-dimensional model of the part being manufactured, dividing the three-dimensional model into two parts, characterized by different types of structures and strength properties corresponding to different types of loads, preheating the substrate, applying a layer of heat-resistant nickel powder alloy, heating the applied layer of the mentioned powder and layer-by-layer growth of the part by laser scanning, characterized in that they use a substrate made of an alloy welded with a heat-resistant nickel alloy of the powder used; before printing the first part of the part with a lower heater, the substrate is preheated to a temperature determined by the expression ( Tsolidus + Tsolvus)/2, where Tsolidus, Tsolvus are the solidus and solvus temperatures of the alloy, the layer of applied powder is heated using an upper heater in the form of an infrared directed focused source in accordance with the heating profile of the three-dimensional model layer, and the heating temperature is set in the temperature range, limited by the solvus temperature and the solidus temperature of the alloy, scanning is carried out at a laser power of 110 W, the operations are repeated until the first part of the part is completely formed, after which the printing is stopped and the first part of the part is subjected to heat treatment using the upper and lower heaters, first at the temperature of homogenization and stress relief, then at a temperature not exceeding the solvus temperature of the alloy with exposure for at least 5 hours to carry out the aging process, then the part is cooled to room temperature in an additive manufacturing installation, after which the second part is grown layer-by-layer on the first part of the part at a laser power of 320 W, with each The layer is scanned with a laser twice. 2. The method according to claim 1, characterized in that layer-by-layer growth of the part is carried out at a scanning speed of 1100 mm/s, a layer thickness of 50 μm, and a distance between individual laser passes of no more than 100 μm. 3. The method according to claim 1, characterized in that short-term heating is carried out with an infrared focused source until the required temperature is reached. 4. The method according to claim 1, characterized in that during the aging process, heating with infrared focused sources is carried out continuously to maintain the required temperature.