Nickel-based high-temperature alloy material and parts thereof

Abstract

The invention provides a nickel-based high-temperature alloy material and a part thereof. The nickel-based high-temperature alloy material comprises the following components in percentage by mass: 12-15% of Cr; co: 24%-28%; 1%-2% of W; 5%-5.5% of Mo; 1%-3% of Nb; 0.1% to 1.0% of Ta; y: 0.0001% to 0.01%; the total amount of Al and Ti is 6%-9%; zr: less than 0.02%; c: < = 0.1%; b: < = 0.1%; less than or equal to 0.05% of La; fe: less than or equal to 0.5%; si: less than or equal to 0.1%; less than or equal to 0.01% of P; s: < = 0.002%; o: < = 0.008%; n: < = 0.005%; and the balance of Ni. Through the component design, the obtained nickel-based high-temperature alloy material can be formed into a crack-free high-temperature alloy part with excellent high-temperature strength and high-temperature ductility through an additive manufacturing technology.

Description

Technical Field

[0001] The present invention relates to the technical field of superalloy materials, and particularly to a nickel-based superalloy material and its parts. Background Art

[0002] Superalloy materials have excellent physical, chemical, and high-temperature mechanical properties, and are widely used in aerospace fields such as aeroengine blades and annular control components, as well as in fields such as civil gas turbines and turbine blades. With the rapid development of the aerospace and civil gas turbine fields, based on the characteristics of superalloy materials, it has been unable to meet the requirements to prepare parts through traditional casting or machining processes, especially for parts with complex shapes that cannot be processed.

[0003] Additive manufacturing is an incremental manufacturing technology based on the concept of discrete - accumulation. Contrary to traditional material removal processing methods, it uses a high-energy beam laser to layer by layer melt metal powder and stack it to form metal parts, which has obvious advantages such as short production cycle, complex part geometric shapes, and a wide variety of materials for processing, and has been widely used in the above fields.

[0004] Currently, there are mainly three additive manufacturing forming methods that can directly form metal parts: selective laser sintering (SLS), laser cladding (LC), and selective laser melting (SLM). However, when these methods are used to form nickel-based superalloys, problems such as insufficient high-temperature strength and low high-temperature elongation usually occur after additive forming, which severely limits the application of nickel-based superalloy materials in load-bearing structural parts and seriously affects the product quality and its safety performance. With the increase in the application of complex superalloy structural parts and the gradual improvement of material property requirements, the existing nickel-based superalloy materials and parts formed based on this nickel-based superalloy material can no longer meet the requirements.

[0005] In view of this, it is necessary to design an improved nickel-based superalloy material and its parts to solve the above problems. Summary of the Invention

[0006] Aiming at the defects of the above-mentioned prior art, the purpose of the present invention is to provide a nickel-based superalloy material, by designing the proportion of each component in the alloy material, enabling it to be formed into a superalloy part with excellent high-temperature strength, high-temperature elongation, and no cracks through additive manufacturing technology.

[0007] To achieve the above purpose, the present invention provides a nickel-based superalloy material, which contains the following components by mass percentage:

[0008] Cr: 12% - 15%; Co: 24% - 28%; W: 1% - 2%; Mo: 5% - 5.5%; Nb: 1% - 3%; Ta: 0.1% - 1.0%; Y: 0.0001% - 0.01%; The total amount of Al and Ti is 6% - 9%; Zr: <0.02%; C: ≤0.1%; B: ≤0.1%; La: ≤0.05%; Fe: ≤0.5%; Si: ≤0.1%; P: ≤0.01%; S: ≤0.002%; O: ≤0.008%; N: ≤0.005%; The balance is Ni.

[0009] As a further improvement of the present invention, in the nickel-based superalloy material, the mass percentage of Al is 2.45% - 3%; the mass percentage of Ti is 4.5% - 6%.

[0010] As a further improvement of the present invention, in the nickel-based superalloy material, the total mass percentage of W and Mo < 7%.

[0011] As a further improvement of the present invention, the nickel-based superalloy material is in the form of powder.

[0012] As a further improvement of the present invention, the particle size of the nickel-based superalloy material is 10 - 200 μm.

[0013] The present invention also provides a nickel-based superalloy part, which is prepared by the additive manufacturing technology from the nickel-based superalloy material.

[0014] As a further improvement of the present invention, before the nickel-based superalloy material is formed by the additive manufacturing technology, vacuum treatment, drying treatment and screening treatment are successively carried out.

[0015] As a further improvement of the present invention, the vacuum treatment includes evacuating and sealing the nickel-based superalloy material in powder form for storage.

[0016] As a further improvement of the present invention, the drying treatment is carried out at 100 - 200 °C for heat preservation for 1.5 - 2.5 h; the drying treatment is carried out under an argon protection atmosphere or in a vacuum condition.

[0017] As a further improvement of the present invention, the particle size of the nickel-based superalloy material in powder form obtained after the screening treatment is 15 - 45 μm.

[0018] The beneficial effects of the present invention are:

[0019] The nickel-based superalloy material provided by the present invention can utilize the synergistic effect between specific components by designing the proportions of the components in the alloy material. On the premise of ensuring the comprehensive properties such as high-temperature mechanical properties, high-temperature oxidation resistance, and high-temperature tissue stability of the material, it can be formed into a superalloy part with excellent high-temperature strength, high-temperature elongation, and no cracks through additive manufacturing technology, effectively solving the technical problem of low high-temperature performance existing in forming superalloy parts through additive manufacturing technology in the prior art. Description of the Drawings

[0020] Figure 1 It is a photomicrograph of the as-deposited metallographic structure of the nickel-based superalloy part formed in Example 1.

[0021] Figure 2 It is a photomicrograph of the as-deposited metallographic structure of the nickel-based superalloy part formed in Example 2.

[0022] Figure 3 It is a photomicrograph of the as-deposited metallographic structure of the nickel-based superalloy part formed in Example 3.

[0023] Figure 4 It is a photomicrograph of the as-deposited metallographic structure of the nickel-based superalloy part formed in Example 4.

[0024] Figure 5 It is a photomicrograph of the as-deposited metallographic structure of the nickel-based superalloy part formed in Comparative Example 1.

[0025] Figure 6 It is a photomicrograph of the as-deposited metallographic structure of the nickel-based superalloy part formed in Comparative Example 2. Detailed Embodiments

[0026] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail below with reference to the drawings and specific embodiments.

[0027] Here, it should also be noted that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present invention are shown in the drawings, while other details less related to the present invention are omitted.

[0028] In addition, it should also be noted that the term "comprising", "including", or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article, or device.

[0029] The present invention provides a nickel-based superalloy material, which contains the following components by mass percentage:

[0030] Cr: 12% - 15%; Co: 24% - 28%; W: 1% - 2%; Mo: 5% - 5.5%; Nb: 1% - 3%; Ta: 0.1% - 1.0%; Y: 0.0001% - 0.01%; The total amount of Al and Ti is 6% - 9%; Zr: <0.02%; C: ≤0.1%; B: ≤0.1%; La: ≤0.05%; Fe: ≤0.5%; Si: ≤0.1%; P: ≤0.01%; S: ≤0.002%; O: ≤0.008%; N: ≤0.005%; The balance is Ni; The total amount of each component is 100%.

[0031] Through the above element composition design, the present invention can utilize the synergistic effect between specific components. On the premise of ensuring the comprehensive properties such as high-temperature mechanical properties, high-temperature oxidation resistance, and high-temperature tissue stability of the material, it can be formed into a superalloy part with excellent high-temperature strength, high-temperature elongation, and no cracks through additive manufacturing technology, effectively solving the technical problem of low high-temperature performance existing in the prior art when forming superalloy parts through additive manufacturing technology.

[0032] More specifically, the present invention introduces Al and Ti as strengthening-phase precipitating alloying elements into the nickel-based superalloy material and controls the total amount of Al and Ti within a specific range, which can ensure the high-temperature mechanical properties of the material. On this basis, the present invention also introduces a specific amount of Cr element, which can act together with the Al element, react with external oxygen, form a dense oxide film on the surface of the formed part, prevent oxygen from continuing to diffuse into the part, and thus improve the oxidation resistance of the material. By controlling the total amount of Al and Ti to be 6% - 9% and the mass percentage of Cr to be 12% - 15%, and further limiting the mass percentage of Al to be 2.45% - 3% and the mass percentage of Ti to be 4.5% - 6%, the present invention can improve the oxidation resistance of the material while ensuring the high-temperature mechanical properties of the material.

[0033] Meanwhile, due to the high content of Al and Ti, the alloy material will have a serious tendency of solidification hot cracking during forming, and there are often a large number of microcracks in the as-printed metallography of this type of alloy. Therefore, in the present invention, by adding rare earth elements in a specific proportion to the alloy and limiting the content of impurity elements such as O, N, and S that tend to segregate to the grain boundaries, the rare earth elements that tend to segregate at the grain boundaries can react with other impurity elements in the alloy that tend to segregate to the grain boundaries to form trace phases. On the one hand, these trace phases can homogenize the distribution of impurity elements, and on the other hand, they can prevent the continuous growth of grain boundaries, thereby refining the grains, reducing the degree of element segregation and the channels for crack propagation, dispersing stress, and further reducing the generation of hot cracks. On this basis, since the Zr element is extremely prone to segregate into the remaining liquid phase during the solidification of the superalloy, the melting point of the interdendritic region is reduced, resulting in solidification cracks in the final stage of solidification; at the same time, it is also easy to form a Zr-rich low-melting phase between the dendrites, forming liquation cracks during the subsequent printing process. Therefore, in the present invention, while adding rare earth elements, the mass percentage of Zr is limited within 0.02%, which can effectively reduce the generation probability of cracks in the as-deposited state.

[0034] In the process of composition design, the present invention also adds alloy elements such as Co, Mo, W, Nb, and Ta in a specific proportion. On the one hand, the addition of these alloy elements can improve the strength of the alloy through solid solution strengthening, and on the other hand, the synergistic effect between these elements can be utilized to inhibit the diffusion of alloy elements, thereby improving the tissue stability of the alloy material at high temperatures. And, the present invention limits the proportion of the refractory alloy element Mo to 5% - 5.5%, which is more inclined to be distributed into the γ phase, thereby increasing the lattice constant of the γ phase, and further causing lattice distortion between the γ and γ' phases in the alloy, forming a dislocation network at the two-phase interface, increasing the dislocation movement resistance, and thus improving the mechanical properties of the alloy. On this basis, the present invention further preferably sets the total mass percentage of W and Mo in the nickel-based superalloy material to be <7%, which can avoid the formation of harmful HCP phases due to excessive total amounts of Mo and W.

[0035] In different embodiments of the present invention, the nickel-based superalloy material can be in different forms such as powder, rod, block, etc., and is preferably powder, so as to directly form it through powder-based additive manufacturing technology. The powder-shaped nickel-based superalloy material can be made by gas atomization powder-making technology after batching and melting raw materials containing corresponding element components. When the superalloy material is in other forms than powder, it can be further prepared into superalloy powder through powder preparation technology and then applied to additive manufacturing.

[0036] In some embodiments of the present invention, the particle size of the powder-shaped nickel-based superalloy material is preferably 10 - 200 μm to better form it through powder-based additive manufacturing technology.

[0037] After the above-mentioned powdery nickel-based superalloy material is formed by additive manufacturing technology, nickel-based superalloy parts can be obtained.

[0038] More preferably, in some embodiments of the present invention, before the powdery nickel-based superalloy material is formed into nickel-based superalloy parts by additive manufacturing technology, the nickel-based superalloy material needs to be subjected to vacuum treatment, drying treatment and screening treatment in sequence.

[0039] More specifically, the vacuum treatment means that before forming, the powdery nickel-based superalloy material needs to be evacuated and then sealed for storage; the drying treatment means that it is kept warm at 100-200 °C for 1.5-2.5 h, and this drying treatment can be carried out in an argon protection atmosphere (argon purity is above 99.999%) or under vacuum conditions; the purpose of the screening treatment is to remove larger particle powders and impurities to obtain fine and uniform powders. Preferably, the particle size of the powdery nickel-based superalloy material obtained after screening is 15-45 μm.

[0040] After completing the above-mentioned vacuum treatment, drying treatment and screening treatment, additive manufacturing technology can be used for forming. Among them, the forming method of additive manufacturing technology can be selective laser sintering (SLS), laser cladding (LC), selective laser melting (SLM) or other related methods, which can be selected according to the actual application needs.

[0041] In some embodiments of the present invention, the forming process specifically includes the following steps:

[0042] First, the above-mentioned screened powdery nickel-based superalloy material is loaded into the powder cylinder of the additive manufacturing equipment. According to the three-dimensional model of the part to be formed, the model is sliced and layered according to a certain thickness, so as to convert the three-dimensional shape information of the part into a series of two-dimensional contour information. Subsequently, under the control of the numerical control system, a laser is used to melt the metal powder through a galvanometer control to directly form a part with a specific geometric shape. During the forming process, the metal powder is completely melted, metallurgical bonding occurs, and layer-by-layer printing is carried out according to the three-dimensional model of the part to make a nickel-based superalloy part with the target geometric shape.

[0043] Specifically, in some embodiments of the present invention, when using the selective laser melting method for forming, the set process parameter range is preferably: laser power 200-310 W, scanning speed 600-1100 mm / s, track spacing 80-110 μm, powder layer thickness 20-40 μm.

[0044] The as-deposited metallography of the nickel-based superalloy parts formed under these conditions is dense and crack-free, and has excellent high-temperature strength and high-temperature elongation.

[0045] Preferably, in some embodiments of the present invention, the as-formed nickel-based superalloy parts have a tensile strength of 1400-1500 MPa, a yield strength of 900-1150 MPa, and an elongation of 10%-20% at room temperature; a tensile strength of 1100-1250 MPa, a yield strength of 900-1000 MPa, and an elongation of 8%-16% at 750 °C; a tensile strength of 350-370 MPa, a yield strength of 280-300 MPa, and an elongation of 9%-11% at 1000 °C, showing excellent high-temperature performance.

[0046] The nickel-based superalloy material and its parts provided by the present invention will be specifically described below in conjunction with specific examples and comparative examples.

[0047] Example 1

[0048] This example provides a nickel-based superalloy material, and the mass percentage content of each element in this material is shown in Table 1, and the total amount of each element is 100%.

[0049] Table 1 Elemental composition of the nickel-based superalloy material provided in Example 1

[0050] Element Ni C Cr Co W Mo Al Wt / % Bal. 0.021 13.22 24.94 1.26 5.11 2.47 Element Ti Nb Ta Y B La Fe Wt / % 4.93 2.23 0.23 0.0006 0.026 0.0003 0.024 Element Si P S O N Zr / Wt / % 0.026 ＜0.005 ＜0.002 0.0076 ＜0.005 <0.02％ /

[0051] In this example, the nickel-based superalloy material containing the above elemental composition is in powder form and is sealed and stored in a vacuum state. Before forming, it is first vacuum-insulated at 200 °C for 2 h for drying treatment, then screened to a particle size of 15-45 μm, and then formed. The specific forming method includes the following steps:

[0052] First, the above-screened powdered nickel-based superalloy material is loaded into the powder cylinder of the additive manufacturing equipment. According to the three-dimensional model of the part to be formed, the model is sliced and layered according to a certain thickness, so as to convert the three-dimensional shape information of the part into a series of two-dimensional contour information. Subsequently, under the control of the numerical control system, a laser is used to melt the metal powder through a galvanometer, and the laser power is set to 260 W, the scanning speed is 800 mm / s, the track spacing is 100 μm, and the powder layer thickness is 30 μm, so as to directly form a part with a specific geometric shape. During the forming process, the metal powder is completely melted to produce metallurgical bonding, and layer-by-layer printing is carried out according to the three-dimensional model of the part to make a nickel-based superalloy part with the target geometric shape.

[0053] The nickel-based superalloy part obtained in this example was observed for its metallographic structure and tested for its mechanical properties, and the as- Figure 1 shown as-deposited metallographic structure photos and mechanical property data as shown in Table 2 were obtained.

[0054] Mechanical property data of the nickel-based superalloy parts in Example 1, Table 2

[0055]

[0056] According to Figure 1 and the test results in Table 2, it can be concluded that the deposited microstructure of the formed nickel-based superalloy parts in this example is dense and crack-free, and has excellent high-temperature strength and high-temperature elongation.

[0057] Example 2

[0058] This example provides a nickel-based superalloy material. The mass percentage content of each element in this material is shown in Table 3, and the total amount of each element is 100%.

[0059] Table 3 Elemental composition of the nickel-based superalloy material provided in Example 2

[0060] Element Ni C Cr Co W Mo Al Wt / % Bal. 0.026 14.26 26.03 1.36 5.47 2.46 Element Ti Nb Ta Y B La Fe Wt / % 4.66 1.76 0.26 0.0008 0.023 0.0007 0.023 Element Si P S O N Zr / Wt / % 0.027 ＜0.005 ＜0.002 0.0069 ＜0.005 <0.02％ /

[0061] In the same manner as in Example 1, the powdered nickel-based superalloy material containing the above elemental composition is subjected to vacuum treatment, drying treatment and screening treatment, and then formed by additive manufacturing technology to obtain nickel-based superalloy parts.

[0062] The nickel-based superalloy parts obtained in this example are observed for their metallographic structure and tested for their mechanical properties, and the deposited metallographic structure photos as shown in Figure 2 and the mechanical property data as shown in Table 4 are obtained.

[0063] Table 4 Mechanical property data of the nickel-based superalloy parts in Example 2

[0064]

[0065] Example 3

[0066] This example provides a nickel-based superalloy material. The mass percentage content of each element in this material is shown in Table 5, and the total amount of each element is 100%.

[0067] Table 5 Elemental composition of the nickel-based superalloy material provided in Example 3

[0068] Element Ni C Cr Co W Mo Al Wt / % Bal. 0.012 13.32 25.04 1.12 5.36 2.87 Element Ti Nb Ta Y B La Fe Wt / % 5.11 2.01 0.43 0.0003 0.015 0.0013 0.026 Element Si P S O N Zr / Wt / % 0.029 ＜0.005 ＜0.002 0.0073 ＜0.005 <0.02％ /

[0069] In the same manner as in Example 1, the powdered nickel-based superalloy material containing the above elemental composition is subjected to vacuum treatment, drying treatment and screening treatment, and then formed by additive manufacturing technology to obtain nickel-based superalloy parts.

[0070] The nickel-based superalloy parts obtained in this example are observed for their metallographic structure and tested for their mechanical properties, and the obtainedFigure 3 The as-deposited metallographic structure photographs and the mechanical property data as shown in Table 6.

[0071] Table 6 Mechanical property data of the nickel-based superalloy parts in Example 3

[0072]

[0073] Example 4

[0074] This example provides a nickel-based superalloy material. The mass percentage contents of each element in this material are as shown in Table 7, and the total amount of each element is 100%.

[0075] Table 7 Elemental composition of the nickel-based superalloy material provided in Example 4

[0076] Element Ni C Cr Co W Mo Al Wt / % Bal. 0.018 14.3 24.06 1.67 5.08 2.48 Element Ti Nb Ta Y B La Fe Wt / % 5.58 1.78 0.23 0.0011 0.02 0.0006 0.025 Element Si P S O N Zr / Wt / % 0.025 ＜0.005 ＜0.002 0.0072 ＜0.005 <0.02％ /

[0077] In the manner of Example 1, the powdered nickel-based superalloy material containing the above elemental composition is subjected to vacuum treatment, drying treatment and screening treatment, and then formed by additive manufacturing technology to obtain nickel-based superalloy parts.

[0078] The nickel-based superalloy parts obtained in this example are observed for metallographic structure and tested for mechanical properties, and the as-deposited metallographic structure photographs as shown in Figure 4 and the mechanical property data as shown in Table 8 are obtained.

[0079] Table 8 Mechanical property data of the nickel-based superalloy parts in Example 4

[0080]

[0081] Comparative Example 1

[0082] This comparative example provides a nickel-based superalloy material. The mass percentage contents of each element in this material are as shown in Table 9, and the total amount of each element is 100%.

[0083] Table 9 Elemental composition of the nickel-based superalloy material provided in Comparative Example 1

[0084] Element Ni C Cr Co W Mo Al Wt / % Bal. 0.021 13.22 24.94 2.5 5 2.47 Element Ti Nb Ta Y B La Fe Wt / % 4.93 2.23 0.23 0.0006 0.026 0.0003 0.024 Element Si P S O N Zr / Wt / % 0.026 ＜0.005 ＜0.002 0.0076 ＜0.005 <0.02％ /

[0085] In the manner of Example 1, the powdered nickel-based superalloy material containing the above elemental composition is subjected to vacuum treatment, drying treatment and screening treatment, and then formed by additive manufacturing technology to obtain nickel-based superalloy parts.

[0086] The nickel-based superalloy parts obtained in this comparative example are observed for metallographic structure and tested for mechanical properties, and the as-deposited metallographic structure photographs as shown in Figure 5 and the mechanical property data as shown in Table 10 are obtained.

[0087] Mechanical property data of the nickel-based superalloy parts in Comparative Example 1 in Table 10

[0088]

[0089] According to the above test results, it can be seen that although the deposited metallographic structure of the formed nickel-based superalloy parts in this comparative example is dense and crack-free, their high-temperature strength and plasticity are both decreased compared with those in Examples 1-4. This may be because the excessive W+Mo leads to the precipitation of the harmful phase TCP phase, which in turn leads to the decrease of the high-temperature properties of the material.

[0090] Comparative Example 2

[0091] This comparative example provides a nickel-based superalloy material, and the mass percentage content of each element in this material is shown in Table 11, and the total amount of each element is 100%.

[0092] Elemental composition of the nickel-based superalloy material provided in Comparative Example 2 in Table 11

[0093]

[0094]

[0095] In the same way as in Example 1, the powdered nickel-based superalloy material containing the above elemental composition is vacuum-treated, dried and sieved, and then formed by additive manufacturing technology to obtain nickel-based superalloy parts.

[0096] The metallographic structure of the nickel-based superalloy parts obtained in this comparative example was observed and the mechanical properties were tested, and the deposited metallographic structure photos as shown in Figure 6 and the mechanical property data as shown in Table 12 were obtained.

[0097] Mechanical property data of the nickel-based superalloy parts in Comparative Example 2 in Table 12

[0098]

[0099] According to the above test results, it can be seen that due to the absence of rare earth elements and the too high Zr content, solidification cracks appear in the deposited metallographic structure. And compared with Examples 1-4, the room temperature and high temperature properties of the material are both decreased.

[0100] In summary, the present invention provides a nickel-based superalloy material and its parts. The nickel-based superalloy material, by mass percentage, includes: Cr: 12% - 15%; Co: 24% - 28%; W: 1% - 2%; Mo: 5% - 5.5%; Nb: 1% - 3%; Ta: 0.1% - 1.0%; Y: 0.0001% - 0.01%; the total amount of Al and Ti is 6% - 9%; Zr: <0.02%; C: ≤0.1%; B: ≤0.1%; La: ≤0.05%; Fe: ≤0.5%; Si: ≤0.1%; P: ≤0.01%; S: ≤0.002%; O: ≤0.008%; N: ≤0.005%; the balance is Ni. Through the above composition design, the present invention can utilize the synergistic effect between specific components, and on the premise of ensuring the comprehensive properties such as high-temperature mechanical properties, high-temperature oxidation resistance, and high-temperature tissue stability of the material, enable it to be formed into a superalloy part with excellent high-temperature strength, high-temperature elongation and no cracks through additive manufacturing technology, effectively solving the technical problem of low high-temperature performance existing in the prior art when forming superalloy parts through additive manufacturing technology.

[0101] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A nickel-based superalloy material, characterized in that, By mass percentage, it contains the following components: Cr: 12% - 15%; Co: 24% - 28%; W: 1% - 2%; Mo: 5% - 5.5%; Nb: 1% - 3%; Ta: 0.1% - 1.0%; Y: 0.0001% - 0.01%; The total amount of Al and Ti is 6% - 9%; Zr：＜0.02％； C：≤0.1％； B：≤0.1％； La: ≤0.05%; Fe: ≤0.5%; Si: ≤0.1%; P：≤0.01％； S: ≤0.002%; O: ≤0.008%; N: ≤0.005%; The balance is Ni.

2. The nickel-based superalloy material according to claim 1, characterized in that: In the nickel-based superalloy material, the mass percentage of Al is 2.45% - 3%; the mass percentage of Ti is 4.5% - 6%.

3. The nickel-based superalloy material according to claim 1, characterized in that: In the nickel-based superalloy material, the total mass percentage of W and Mo < 7%.

4. The nickel-based superalloy material according to claim 1, wherein: The nickel-based superalloy material is in a powder form.

5. The nickel-based superalloy material according to claim 4, characterized in that: The particle size of the nickel-based superalloy material is 10 - 200 μm.

6. A nickel-based superalloy part, characterized in that: The nickel-based superalloy part is prepared by an additive manufacturing technique using the nickel-based superalloy material described in any one of claims 1 - 4.

7. The nickel-based superalloy part according to claim 6, wherein: Before being formed by the additive manufacturing technique, the nickel-based superalloy material has also been subjected to vacuum treatment, drying treatment, and screening treatment in sequence.

8. The nickel-based superalloy part according to claim 7, characterized in that: The vacuum treatment includes evacuating and sealing the nickel-based superalloy material in powder form for storage.

9. The nickel-based superalloy part according to claim 7, wherein: The drying treatment is to keep it at 100 - 200 °C for 1.5 - 2.5 h; the drying treatment is carried out under an argon protection atmosphere or in a vacuum condition.

10. The nickel-based superalloy part according to claim 7, characterized in that: The particle size of the nickel-based superalloy material in powder form obtained after the screening treatment is 15 - 45 μm.

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