A method for restoring a nickel-based superalloy disk

Abstract

The present application relates to alloy material repairing technical field, especially to a kind of nickel-based superalloy wheel disc recovery method.The present application of a kind of nickel-based superalloy wheel disc recovery method includes the following steps: the nickel-based superalloy wheel disc to be recovered is sequentially subjected to hot isostatic pressing treatment, vacuum solid solution heat treatment and vacuum aging heat treatment.The present application is repaired to the nickel-based superalloy wheel disc to be recovered after service by the way of hot isostatic pressing treatment, vacuum solid solution heat treatment and vacuum aging heat treatment combination, so that the internal organization of the nickel-based superalloy wheel disc after service is restored to close initial appearance, and mechanical properties are recovered;The organization of the nickel-based superalloy wheel disc after recovery changes obviously, the size of γ' phase decreases, the quantity reduces, and the third γ' phase is restored to near spherical;The hardness value of the nickel-based superalloy wheel disc after recovery decreases, and the impact toughness is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of alloy material repair technology, and in particular to a method for restoring a nickel-based high-temperature alloy wheel. Background Technology

[0002] Nickel-based superalloy turbine disks are high-temperature alloy disks with nickel as the matrix and aluminum, titanium, and niobium as reinforcing phases. They operate at temperatures of 750–800℃. Nickel-based superalloys possess excellent high-temperature creep and fatigue properties, making them key materials for manufacturing turbine disks for aero-engines and ground-based gas turbines. Nickel-based superalloy turbine disks are critical components of aero-engines, typically operating in complex environments with high temperatures and pressures. They are subjected to corrosion and erosion from high-temperature exhaust gases, as well as complex mechanical loads, making their service environment harsh. Therefore, nickel-based superalloy turbine disks inevitably experience microstructural and performance degradation, and may even fail and fracture, after a certain service life. To avoid major accidents, regular overhauling or replacement of the disks is necessary.

[0003] Restoring the microstructure of nickel-based superalloy wheels to their original morphology, while also preserving their mechanical properties, and extending their service life is one of the best ways to save costs.

[0004] In view of this, this invention is hereby proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a method for restoring nickel-based high-temperature alloy wheel disks, which can restore the microstructure and mechanical properties of nickel-based high-temperature alloy wheel disks after service to near the factory level.

[0006] In order to achieve the above-mentioned objectives of the present invention, the following technical solution is adopted:

[0007] This invention provides a method for restoring a nickel-based high-temperature alloy wheel, comprising the following steps:

[0008] The nickel-based high-temperature alloy wheel to be restored was subjected to hot isostatic pressing, vacuum solution heat treatment, and vacuum aging heat treatment in sequence.

[0009] Furthermore, the hot isostatic pressing process includes: heat preservation treatment at a temperature of 950–1050°C and a pressure of 80–160 MPa, followed by furnace cooling.

[0010] Furthermore, the hot isostatic pressing treatment takes 2 to 6 hours.

[0011] Further, the vacuum solution heat treatment includes: heating to a first solution heat treatment temperature T1 at a first heating rate and holding for 1 to 2 hours; then heating to a second solution heat treatment temperature T2 at a second heating rate and holding for 0.5 to 1 hour; then heating to a third solution heat treatment temperature T3 at a third heating rate and holding for 2 to 6 hours, followed by cooling.

[0012] Wherein, the first solution heat treatment temperature T1 = (T s,γ' -120℃)±5℃; the second solution heat treatment temperature T2=(T s,γ' +10℃)±5℃; the third solution heat treatment temperature T3=(T s,γ' +30℃)±5℃; T s,γ' The complete solid solution temperature of the γ' phase in the nickel-based high-temperature alloy wheel disk is given.

[0013] Further, the first heating rate is 1 to 2 °C / min; the second heating rate is 2 to 2.5 °C / min; and the third heating rate is 0.5 to 1 °C / min.

[0014] Furthermore, the vacuum aging heat treatment includes: heating to 400±5℃ at a fourth heating rate and holding for 0.5 to 1 hour; then heating to 600±5℃ at a fifth heating rate and holding for 0.5 to 1 hour; then heating to 770±5℃ at a sixth heating rate and holding for 13 to 17 hours, followed by cooling.

[0015] Furthermore, the fourth heating rate is 1-2℃ / min; the fifth heating rate is 1-2℃ / min; and the sixth heating rate is 2.5-3℃ / min.

[0016] Furthermore, the cooling includes cooling to <200°C at a cooling rate of 30–70°C / min.

[0017] Furthermore, the cooling method includes gas quenching.

[0018] Furthermore, the pressure of the gas quenching is 1.5 to 2 bar.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The present invention provides a method for restoring nickel-based superalloy disks. This method combines hot isostatic pressing, vacuum solution heat treatment, and vacuum aging heat treatment with specific parameters to repair nickel-based superalloy disks that have been in service. This restores the internal structure and mechanical properties of the nickel-based superalloy disks to near-factory levels. The microstructure of the restored nickel-based superalloy disks changes significantly, with a decrease in the size and number of γ' phases, and the tertiary γ' phases are restored to near-spherical shapes. The hardness of the restored nickel-based superalloy disks decreases to within the technical requirements range, while the impact toughness is significantly improved, with an improvement of over 160%. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 The images shown are ECCI and SEM images of the nickel-based high-temperature alloy wheel hub and rim to be restored in Embodiment 1 of the present invention.

[0023] Figure 2 This is a SEM image of the restored nickel-based high-temperature alloy wheel rim in Embodiment 1 of the present invention.

[0024] Figure 3 The values ​​are the hardness values ​​of the nickel-based high-temperature alloy wheel to be restored and the restored nickel-based high-temperature alloy wheel in Embodiment 1 of the present invention.

[0025] Figure 4 The impact toughness of the nickel-based superalloy wheel to be restored and the restored nickel-based superalloy wheel in Embodiment 1 of the present invention is shown.

[0026] Figure 5 This is an ECCI photograph of the nickel-based high-temperature alloy wheel after hot isostatic pressing in Embodiment 1 of the present invention.

[0027] Figure 6 This is an ECCI photograph of the nickel-based high-temperature alloy wheel after hot isostatic pressing in Embodiment 3 of the present invention.

[0028] Figure 7 The values ​​represent the hardness values ​​of the recovered nickel-based high-temperature alloy wheel discs in Examples 1 and 3 of this invention.

[0029] Figure 8 The impact toughness of the recovered nickel-based superalloy wheel discs in Examples 1 and 3 of the present invention is shown.

[0030] Figure 9 This is an ECCI photograph of the nickel-based high-temperature alloy wheel after hot isostatic pressing in Example 4 of the present invention.

[0031] Figure 10 The value represents the hardness of the recovered nickel-based high-temperature alloy wheel in Examples 1 and 4 of this invention.

[0032] Figure 11 The impact toughness of the recovered nickel-based superalloy wheel discs in Examples 1 and 4 of this invention. Detailed Implementation

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of the present invention, but not all embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0034] In some embodiments of the present invention, a method for restoring a nickel-based high-temperature alloy wheel is provided, comprising the following steps:

[0035] The nickel-based high-temperature alloy wheel to be restored was subjected to hot isostatic pressing, vacuum solution heat treatment, and vacuum aging heat treatment in sequence.

[0036] The method for restoring the nickel-based superalloy wheel of the present invention firstly reduces the internal substructural defects of the alloy material by hot isostatic pressing (HIP) using a combination of heat and mechanical treatment; then, it precipitates a γ' phase of suitable size by vacuum solution heat treatment; and then, it precipitates a tertiary γ' phase of suitable morphology, size and volume fraction by vacuum aging heat treatment; thereby restoring the internal structure of the nickel-based superalloy wheel after service to near its initial morphology and simultaneously restoring the mechanical properties of the nickel-based superalloy wheel.

[0037] In some embodiments of the present invention, the nickel-based superalloy wheel includes a nickel-based superalloy wheel containing 20wt% to 60wt% of γ' phase; preferably, the nickel-based superalloy wheel includes a nickel-based superalloy wheel with γ' phase content of 20wt% to 40wt%.

[0038] In some embodiments of the present invention, the nickel-based superalloy wheel to be restored includes a nickel-based superalloy wheel after service.

[0039] In some embodiments of the present invention, hot isostatic pressing (HIP) includes: holding at a temperature of 950–1050°C and a pressure of 80–160 MPa, followed by furnace cooling; typically, but not limitingly, for example, the temperature of HIP can be a range of 950°C, 960°C, 970°C, 980°C, 990°C, 1000°C, 1010°C, 1020°C, 1030°C, 1040°C, 1050°C, or any combination thereof; the pressure of HIP can be a range of 80 MPa, 90 MPa, 100 MPa, 110 MPa, 120 MPa, 130 MPa, 140 MPa, 150 MPa, 160 MPa, or any combination thereof.

[0040] In some embodiments of the present invention, the hot isostatic pressing (HIP) treatment time is 2 to 6 hours; typically, but not limitingly, for example, the HIP treatment time can be a range of 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, or any combination thereof.

[0041] The nickel-based superalloy of the present invention, after hot isostatic pressing, has two precipitates in its microstructure. The larger precipitate has a size of 120-300 nm, and the smaller precipitate has a size of 30-50 nm. At the same time, the hot isostatic pressing heat treatment effectively reduces the internal micro-defects of the alloy material, reduces the dislocation density, and eliminates obvious creep pores.

[0042] In some embodiments of the present invention, the vacuum solution heat treatment includes: heating from a first initial temperature to a first solution heat treatment temperature T1 at a first heating rate and holding for 1 to 2 hours; then heating from the first solution heat treatment temperature T1 to a second solution heat treatment temperature T2 at a second heating rate and holding for 0.5 to 1 hour; then heating from the second solution heat treatment temperature T2 to a third solution heat treatment temperature T3 at a third heating rate and holding for 2 to 6 hours, followed by a first cooling.

[0043] Wherein, the first solution heat treatment temperature T1=(T s,γ' -120℃)±5℃; Second solution heat treatment temperature T2=(T s,γ' +10℃)±5℃; Third solution heat treatment temperature T3=(T s,γ' +30℃)±5℃; T s,γ' The complete solid solution temperature of the γ' phase in nickel-based superalloys.

[0044] In some embodiments of the present invention, the first heating rate is 1 to 2 °C / min; the second heating rate is 2 to 2.5 °C / min; and the third heating rate is 0.5 to 1 °C / min.

[0045] In some embodiments of the present invention, the first initial temperature is less than 100°C.

[0046] In some embodiments of the present invention, the first cooling includes cooling to <200°C at a cooling rate of 30 to 70°C / min.

[0047] In some embodiments of the present invention, the first cooling method includes gas quenching; preferably, the pressure of gas quenching is 1.5 to 2 bar.

[0048] In some embodiments of the present invention, the vacuum degree of vacuum solution heat treatment can be 10. -4 Pa.

[0049] In some embodiments of the present invention, the vacuum aging heat treatment includes: heating from the second initial temperature to 400±5℃ at a fourth heating rate and holding for 0.5 to 1 hour; then heating to 600±5℃ at a fifth heating rate and holding for 0.5 to 1 hour; then heating to 770±5℃ at a sixth heating rate and holding for 13 to 17 hours, followed by a second cooling.

[0050] In some embodiments of the present invention, the fourth heating rate is 1 to 2 °C / min; the fifth heating rate is 1 to 2 °C / min; and the sixth heating rate is 2.5 to 3 °C / min.

[0051] In some embodiments of the present invention, the second initial temperature is <100°C.

[0052] In some embodiments of the present invention, the second cooling includes cooling to <200°C at a rate of 30 to 70°C / min.

[0053] In some embodiments of the present invention, the second cooling method includes gas quenching; preferably, the pressure of gas quenching is 1.5 to 2 bar.

[0054] Vacuum heat treatment (vacuum solution heat treatment and vacuum aging heat treatment) can weaken the oxidation of the surface of nickel-based superalloy wheel during the repair process. At the same time, nitrogen is introduced to a specific pressure during the cooling stage of vacuum heat treatment to control the cooling rate, reduce the large residual stress inside the nickel-based superalloy wheel caused by the high cooling rate, and reduce dimensional deformation.

[0055] The present invention repairs nickel-based superalloy wheel disks awaiting restoration after service by hot isostatic pressing, vacuum solution heat treatment and vacuum aging heat treatment with the above-mentioned specific parameters. The resulting restored nickel-based superalloy wheel disk exhibits significant changes in microstructure, with a decrease in the size and quantity of the γ' phase, and the three γ' phases are restored to a near-spherical shape.

[0056] Compared to the nickel-based superalloy wheel that was to be restored, the hardness of the restored nickel-based superalloy wheel decreased to within the technical requirements range, while its impact toughness was significantly improved, with an improvement of more than 160%.

[0057] Example 1

[0058] The method for restoring a nickel-based high-temperature alloy wheel provided in this embodiment includes the following steps:

[0059] S1. After the nickel-based high-temperature alloy wheel disk to be restored after service is heat-treated at 1020-1040℃ and 100-140MPa for 3-5 hours, it is then furnace-cooled (cooling is completed in the heating chamber) to obtain the nickel-based high-temperature alloy wheel disk after hot isostatic pressing treatment.

[0060] The nickel-based superalloys, by mass percentage, include the following components:

[0061] Chromium: 13wt%–16wt%, Aluminum: 1.3wt%–1.7wt%, Molybdenum: 2.8wt%–3.2wt%, Titanium: 2.35wt%–2.75wt%, Iron: 1.8wt%–2.2wt%, Carbon: 0.06wt%–0.1wt%, Zirconium: 0.04wt%–0.06wt%, Niobium: 1.8wt%–2.2wt%, Manganese: 0.2wt%–0.6wt%, Nickel: Balance.

[0062] S2. Place the hot isostatically pressed nickel-based high-temperature alloy wheel in a vacuum heat treatment furnace with a vacuum degree of 10. - 4 Pa, the temperature is increased from less than 100℃ to the first solution heat treatment temperature T1 at a rate of 1-2℃ / min and held for 1-1.75h; then the temperature is increased from T1 to the second solution heat treatment temperature T2 at a rate of 2-2.5℃ / min and held for 0.5-1h; then the temperature is increased from T2 to the third solution heat treatment temperature T3 at a rate of 0.5-1℃ / min and held for 3-5h. After that, the temperature is cooled by gas quenching, with nitrogen gas introduced to a pressure of 1.5-2 bar during the cooling process, and the temperature is reduced to <200℃ at a rate of 40-60℃ / min to obtain a nickel-based high-temperature alloy wheel after vacuum solution heat treatment.

[0063] Where, T1=(T s,γ' -120℃)±5℃;T2=(T s,γ' +10℃)±5℃;T3=(T s,γ' +30℃)±5℃; T s,γ' The complete solid solution temperature of the γ' phase in a nickel-based superalloy wheel.

[0064] S3. In a vacuum or protective atmosphere, the nickel-based superalloy wheel after vacuum solution heat treatment is heated from less than 100℃ to 400±3℃ at a rate of 1-2℃ / min and held for 0.5-1h; then heated from 400±3℃ to 600±3℃ at a rate of 1-2℃ / min and held for 0.5-1h; then heated from 600±3℃ to 772±3℃ at a rate of 2.5-3℃ / min and held for 14-16h. After cooling by gas quenching, nitrogen is introduced to a pressure of 1.5-2 bar during the cooling process, and the temperature is lowered to <200℃ at a rate of 40-60℃ / min to obtain the restored nickel-based superalloy wheel.

[0065] Example 2

[0066] The method for restoring a nickel-based high-temperature alloy wheel provided in this embodiment includes the following steps:

[0067] S1. After the nickel-based high-temperature alloy wheel disk to be restored after service is held at 980-1010℃ and 90-98MPa for 2-2.5 hours, it is then furnace cooled (cooling is completed in the heating chamber) to obtain the nickel-based high-temperature alloy wheel disk after hot isostatic pressing treatment.

[0068] The nickel-based superalloys, by mass percentage, include the following components:

[0069] Chromium: 13wt%–16wt%, Aluminum: 1.3wt%–1.7wt%, Molybdenum: 2.8wt%–3.2wt%, Titanium: 2.35wt%–2.75wt%, Iron: 1.8wt%–2.2wt%, Carbon: 0.06wt%–0.1wt%, Zirconium: 0.04wt%–0.06wt%, Niobium: 1.8wt%–2.2wt%, Manganese: 0.2wt%–0.6wt%, Nickel: Balance.

[0070] S2. Place the hot isostatically pressed nickel-based high-temperature alloy wheel in a vacuum heat treatment furnace with a vacuum degree of 10. - 4 The solution is heated from less than 100°C to the first solution heat treatment temperature T1 at a rate of 1–2°C / min and held for 1.8–2 hours; then heated from T1 to the second solution heat treatment temperature T2 at a rate of 2–2.5°C / min and held for 0.5–1 hours; then heated from T2 to the third solution heat treatment temperature T3 at a rate of 0.5–1°C / min and held for 2–2.5 hours. After that, the solution is cooled by gas quenching, with nitrogen gas introduced to a pressure of 1.5–2 bar during the cooling process, and cooled to <200°C at a rate of 65–70°C / min, to obtain a nickel-based high-temperature alloy wheel after vacuum solution heat treatment.

[0071] Where, T1=(T s,γ'-120℃)±5℃;T2=(T s,γ' +10℃)±5℃;T3=(T s,γ' +30℃)±5℃; T s,γ' The complete solid solution temperature of the γ' phase in a nickel-based superalloy wheel.

[0072] S3. In a vacuum or protective atmosphere, the nickel-based superalloy wheel after vacuum solution heat treatment is heated from less than 100℃ to 400±3℃ at a rate of 1-2℃ / min and held for 0.5-1h; then heated from 400±3℃ to 600±3℃ at a rate of 1-2℃ / min and held for 0.5-1h; then heated from 600±3℃ to 772±3℃ at a rate of 2.5-3℃ / min and held for 16.5-17h. After that, a gas quenching cooling method is used, in which nitrogen is introduced to a pressure of 1.5-2 bar during the cooling process, and the temperature is reduced to <200℃ at a rate of 40-60℃ / min to obtain the restored nickel-based superalloy wheel.

[0073] Example 3

[0074] The method for restoring the nickel-based high-temperature alloy wheel provided in this embodiment refers to Embodiment 1, except that in step S1, the nickel-based high-temperature alloy wheel to be restored after service is held at 1060℃~1120℃ and 100~140MPa for 3~5 hours and then furnace cooled (cooling is completed in the heating chamber) to obtain the nickel-based high-temperature alloy wheel after hot isostatic pressing treatment.

[0075] Example 4

[0076] The method for restoring the nickel-based high-temperature alloy wheel provided in this embodiment refers to Embodiment 1, except that in step S1, the nickel-based high-temperature alloy wheel to be restored after service is kept at 1020-1040℃ and 0MPa for 3-5 hours and then furnace cooled (cooling is completed in the heating chamber) to obtain the nickel-based high-temperature alloy wheel after hot isostatic pressing.

[0077] Experimental Example 1

[0078] ECCI and SEM tests were performed on the rim and hub of the nickel-based superalloy wheel disc to be restored after service in Example 1. The results are as follows: Figure 1 As shown. Figure 1 Image 'a' in the image is an ECCI image of the wheel hub. Figure 1 Image b in the middle is an ECCI image of the rim; Figure 1 SEM image of the C-shaped wheel hub; Figure 1 In the image, d represents the SEM image of the wheel rim.

[0079] The nickel-based superalloy wheel in Example 1, which was to be restored after service, had been in service for 950 hours and was close to its first major overhaul period. Microstructural observation of the wheel rim and hub of the nickel-based superalloy wheel after service was performed by ECCI and SEM. It was found that the white strip-shaped dislocations at the wheel rim had increased significantly, and the tertiary γ' phase showed a certain square shape.

[0080] SEM testing was performed on the hub of the restored nickel-based superalloy wheel disc in Example 1, and the results are as follows: Figure 2 As shown.

[0081] from Figure 2 It can be seen that the microstructure at the rim of the nickel-based high-temperature alloy wheel after restoration by the present invention has changed significantly, with the size and quantity of the γ' phase decreasing, and the tertiary γ' phase being restored to a near-spherical shape.

[0082] The hardness and impact toughness of the nickel-based superalloy wheel disc to be restored after service (before restoration heat treatment) and the restored nickel-based superalloy wheel disc (after restoration heat treatment) in Example 1 were tested, and the results are as follows: Figure 3 and Figure 4 As shown.

[0083] from Figure 3 and Figure 4 It can be seen that, compared with the unrestored nickel-based superalloy wheel, the hardness value at the rim of the restored nickel-based superalloy wheel has decreased to within the technical requirements range, while the impact toughness has been greatly improved, with an improvement of more than 160%.

[0084] ECCI tests were performed on the nickel-based superalloy wheels after hot isostatic pressing in Examples 1 and 3, and the results are as follows: Figure 5 and Figure 6 As shown.

[0085] from Figure 5 and Figure 6 It can be seen that, compared with Example 1, the size of the reinforcing phase of the nickel-based superalloy wheel after hot isostatic pressing in Example 3 is larger.

[0086] The hardness and impact toughness of the restored nickel-based superalloy wheel discs in Example 1 and Example 3 were tested, and the results are as follows: Figure 7 and Figure 8 As shown.

[0087] from Figure 7 and Figure 8 It can be seen that the nickel-based high-temperature alloy wheel in Example 3 has a high hardness value and low impact toughness. Since the principle of performance recovery heat treatment is to reduce hardness and improve impact toughness, the performance recovery effect is poor after the hot isostatic pressing heat treatment temperature exceeds 950℃~1050℃.

[0088] ECCI testing was performed on the nickel-based superalloy wheel after hot isostatic pressing in Example 4, and the results are as follows: Figure 9 As shown.

[0089] from Figure 5 and Figure 9 It can be seen that, compared with Example 1, the strengthening phase of the nickel-based superalloy wheel after hot isostatic pressing in Example 4 is smaller and more dispersed.

[0090] The hardness and impact toughness of the restored nickel-based superalloy wheel discs in Example 1 and Example 4 were tested, and the results are as follows: Figure 10 and Figure 11 As shown.

[0091] from Figure 10 and Figure 11 It can be seen that the hardness and impact toughness of the restored nickel-based superalloy wheel disc in Example 4 are weaker than those in Example 1. Since the principle of performance restoration heat treatment is to reduce hardness and improve impact toughness, the performance restoration effect is poor when the hot isostatic pressing pressure is lower than 80–160 MPa.

[0092] The hardness and impact toughness of the nickel-based superalloy wheels before and after restoration in Examples 1-4 and Comparative Example 1 were tested, and the results are recorded in Table 1.

[0093] Table 1

[0094]

[0095]

[0096] This description is intended 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 foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for restoring a nickel-based high-temperature alloy wheel, characterized in that, Includes the following steps: The nickel-based high-temperature alloy wheel to be restored was subjected to hot isostatic pressing, vacuum solution heat treatment and vacuum aging heat treatment in sequence. The hot isostatic pressing process includes: heat preservation treatment at a temperature of 950~1050℃ and a pressure of 80~160MPa, followed by furnace cooling; The vacuum solution heat treatment includes: heating to a first solution heat treatment temperature T1 at a first heating rate and holding for 1-2 hours; then heating to a second solution heat treatment temperature T2 at a second heating rate and holding for 0.5-1 hours; then heating to a third solution heat treatment temperature T3 at a third heating rate and holding for 2-6 hours, followed by cooling. Wherein, the first solution heat treatment temperature T1 = (T s,γ' -120℃) ±5℃; the second solution heat treatment temperature T2 = (T s,γ' +10℃) ±5℃; the third solution heat treatment temperature T3 = (T s,γ' +30℃) ±5℃; T s,γ' The complete solid solution temperature of the γ' phase in the nickel-based superalloy wheel disk; The vacuum aging heat treatment includes: heating to 400±5℃ at a fourth heating rate and holding for 0.5~1h; then heating to 600±5℃ at a fifth heating rate and holding for 0.5~1h; then heating to 770±5℃ at a sixth heating rate and holding for 13~17h, followed by cooling. The cooling method includes gas quenching, and the pressure of the gas quenching is 1.5~2 bar.

2. The method for restoring a nickel-based high-temperature alloy wheel according to claim 1, characterized in that, The hot isostatic pressing process takes 2 to 6 hours.

3. The method for restoring a nickel-based high-temperature alloy wheel according to claim 1, characterized in that, The first heating rate is 1~2℃ / min; the second heating rate is 2~2.5℃ / min; and the third heating rate is 0.5~1℃ / min.

4. The method for restoring a nickel-based high-temperature alloy wheel according to claim 1, characterized in that, The fourth heating rate is 1~2℃ / min; the fifth heating rate is 1~2℃ / min; and the sixth heating rate is 2.5~3℃ / min.

5. The method for restoring a nickel-based high-temperature alloy wheel according to claim 1, characterized in that, The cooling process includes cooling the temperature to <200°C at a rate of 30~70°C / min.

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