Method for presetting residual stress of high-temperature alloy disc annular part

Abstract

The invention relates to the technical field of high-temperature alloy heat treatment, in particular to a method for presetting residual stress of a high-temperature alloy disc annular part. The method for presetting the residual stress of the high-temperature alloy disc annular part comprises the following steps that the surface of a non-inner-hole area of the high-temperature alloy disc annular part is subjected to coating treatment, and a pretreated part is obtained; solid solution heat treatment is conducted on the pretreated part, then first forced cooling is conducted on the inner hole area, a cooling medium is a single-phase medium or a double-phase medium, and a first treated part is obtained; and aging heat treatment is conducted on the first treatment piece, then second forced cooling is conducted on the inner hole area, and the cooling medium is a single-phase medium or a double-phase medium. According to the method, the distribution characteristics of an internal temperature field of the high-temperature alloy disc ring-shaped part are effectively changed by regulating and controlling the heat exchange coefficients of different positions of the high-temperature alloy disc ring-shaped part in the cooling process and the differentiated design of local cooling behaviors, so that a target residual stress distribution form is formed; and the reliability, the structural stability and the service life of the high-temperature alloy disc annular part in the service process are improved.

Description

Technical Field

[0001] This invention relates to the field of high-temperature alloy heat treatment technology, and more specifically, to a method for pre-setting residual stress in high-temperature alloy disc-ring parts. Background Technology

[0002] High-temperature alloy discs / rings are core hot-end components in thermomechanical systems such as aero engines and gas turbines. They need to rotate at high speeds in high-temperature environments and withstand extremely high centrifugal loads and thermal stresses. To achieve the required level of material strengthening, these disc / ring parts typically require solution treatment at or above the complete melting temperature of the strengthening phases after forging, followed by rapid cooling at a high rate to prevent coarsening of the strengthening phases such as γ′ or γ″, ensuring the stability of the microstructure and properties. Current processes often employ quenching methods such as oil quenching, salt quenching, or water quenching. However, due to the significant temperature gradient that easily forms between the surface and interior of the disc / ring parts during cooling, high and poorly distributed residual stresses are generated. These residual stresses can further lead to unexpected deformation and overall performance degradation of the disc / ring during service, severely impacting the operational reliability and service life of engine parts. For high-temperature alloys, their stacking fault energy is significantly lower than that of other metals, making dislocation climb difficult and suppressing the recovery mechanism at high temperatures. Therefore, high-temperature alloys are more prone to accumulating residual stress compared to other materials. Existing residual stress control methods cannot specifically optimize the distribution of residual stress and rely on specialized equipment, are technically challenging, and incur high time and economic costs, making industrial-scale mass production difficult.

[0003] Therefore, there is an urgent need for a method to pre-set the residual stress of high-temperature alloy discs / rings to optimize the distribution of residual stress.

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

[0005] One objective of this invention is to provide a method for pre-setting residual stress in high-temperature alloy disc-ring components, which can optimize the residual stress distribution and improve the reliability, structural stability, and service life of high-temperature alloy disc-ring components during service.

[0006] In order to achieve the above-mentioned objectives of the present invention, the following technical solution is adopted: A method for pre-setting residual stress in a high-temperature alloy disc-ring component includes the following steps: (a) The surface of the non-internal hole area of ​​the high-temperature alloy disc ring is coated to reduce the heat transfer coefficient of the non-internal hole area during the heat treatment quenching process, and a pretreated part is obtained.

[0007] (b) The pre-treated part is subjected to solution heat treatment, and then the inner hole area of ​​the pre-treated part after solution heat treatment is subjected to first forced cooling. The cooling medium of the first forced cooling is a single-phase medium or a two-phase medium to obtain the first treated part.

[0008] (c) The first processing component is subjected to aging heat treatment, and then the inner hole area of ​​the first processing component after aging heat treatment is subjected to second forced cooling, wherein the cooling medium of the second forced cooling is a single-phase medium or a two-phase medium.

[0009] In some embodiments, the coating process uses a coating material including at least one of ceramic fiber, glass fiber, and asbestos.

[0010] In some implementations, when the radial dimension of the high-temperature alloy disc ring is small and the required cooling rate is low, the single-phase medium is used for forced cooling.

[0011] In some implementations, when the radial dimension of the high-temperature alloy disc ring is large and a high cooling rate is required, the two-phase medium is used for forced cooling.

[0012] In some embodiments, the single-phase medium is a gas. The gas includes air or nitrogen.

[0013] In some embodiments, the gas flow rate of the single-phase medium is 5~150 m / s.

[0014] In some embodiments, the two-phase cooling medium is a gas and atomized droplets. The gas includes air or nitrogen; the atomized droplets have a particle size distribution ranging from 10 to 500 μm.

[0015] In some embodiments, the gas flow rate in the two-phase medium is 5~150 m / s.

[0016] In some embodiments, the material of the high-temperature alloy disc ring includes GH4169, GH4065A, FGH4096, FGH4099, GH4251, GH4738, GH4720Li, GH4169D or FGH4095.

[0017] In some embodiments, the high-temperature alloy disc ring includes a high-pressure turbine disc, a low-pressure turbine disc, a turbine front sealing disc, a large-size equal-thickness casing, or a non-standard casing.

[0018] In some embodiments, the solution heat treatment temperature is T-80℃ to T-10℃, where T is the complete re-dissolution temperature of the γ' phase or γ''; the solution heat treatment time is 0.5~6h.

[0019] In some embodiments, the aging heat treatment method includes single-stage aging or multi-stage aging; the temperature of the aging heat treatment is 600~900℃, and the time of the aging heat treatment is 4~24h. Compared with the prior art, the beneficial effects of the present invention are as follows: The method for pre-setting residual stress in high-temperature alloy disc-ring components of the present invention, through the coordination of each step, effectively changes the distribution characteristics of the internal temperature field by adjusting the heat exchange coefficient and the differentiated design of local cooling behavior at different positions of the high-temperature alloy disc-ring component during the cooling process, thereby adjusting the evolution path of the stress field and forming the target residual stress distribution pattern, thereby improving the reliability, structural stability and service life of the high-temperature alloy disc-ring component during service. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the inner hole area and the non-inner hole area of ​​the high-temperature alloy disc-shaped part of the present invention; Figure 2 This is a half-sectional schematic diagram of the high-temperature alloy ring-shaped part according to Embodiment 1 of the present invention; Figure 3 This is a measured residual stress distribution diagram of the high-temperature alloy ring-shaped part prepared in Example 1 of the present invention; Figure 4 This is a half-sectional schematic diagram of the high-temperature alloy disc-shaped part according to Embodiment 2 of the present invention; Figure 5 The measured residual stress distribution diagram of the high-temperature alloy disc-shaped part prepared in Example 2 of the invention; Figure 6 This is a half-sectional schematic diagram of the high-temperature alloy ring-shaped part prepared in Example 3 of the present invention; Figure 7 This is a measured residual stress distribution diagram of the high-temperature alloy ring-shaped part prepared in Example 3 of the present invention; Figure 8 This is a half-sectional schematic diagram of the high-temperature alloy disc-shaped part prepared in Example 4 of the present invention; Figure 9 This is a measured residual stress distribution diagram of the high-temperature alloy disc-shaped part prepared in Example 4 of the present invention; Figure 10 The measured residual stress distribution diagram is shown for the high-temperature alloy ring-shaped part prepared in Comparative Example 1 of this invention. Figure 11 The measured residual stress distribution diagram is shown for the high-temperature alloy disc-shaped part prepared in Comparative Example 2 of this invention. Figure 12 This is a rotational speed-deformation diagram of the high-temperature alloy disc-shaped part prepared in Example 2 of the present invention; Figure 13 This is a rotational speed-deformation diagram of the high-temperature alloy disc-shaped part prepared in Comparative Example 2 of the present invention. Detailed Implementation

[0022] The embodiments of the present invention will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are for illustrative purposes only and should not be considered as limiting the scope of the invention. Unless otherwise specified in the examples, conventional conditions or conditions recommended by the manufacturer are followed. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0023] According to one aspect of the present invention, the present invention relates to a method for pre-setting residual stress in a high-temperature alloy disc-ring component, comprising the following steps: (a) The surface of the non-internal hole area of ​​the high-temperature alloy disc ring is coated to reduce the heat transfer coefficient of the non-internal hole area during the heat treatment quenching process, and a pretreated part is obtained.

[0024] (b) The pre-treated part is subjected to solution heat treatment, and then the inner hole region of the pre-treated part after solution heat treatment is subjected to first forced cooling, thereby increasing the heat transfer coefficient of the inner hole region; the cooling medium of the first forced cooling is a single-phase medium or a two-phase medium, to obtain the first treated part.

[0025] (c) The first processing component is subjected to aging heat treatment, and then the inner hole area of ​​the first processing component after aging heat treatment is subjected to second forced cooling, wherein the second forced cooling is the same as the cooling medium of the first forced cooling.

[0026] The method for pre-setting residual stress in high-temperature alloy disc-ring components of this invention, through the coordinated operation of each step, effectively alters the distribution characteristics of the internal temperature field by controlling the heat exchange coefficient and the differentiated design of local cooling behavior at different locations during the cooling process of the high-temperature alloy disc-ring component. This, in turn, adjusts the evolution path of the stress field, forming a target residual stress distribution pattern, thereby improving the reliability, structural stability, and service life of the high-temperature alloy disc-ring component during service. This method combines the advantages of effectiveness, engineering controllability, and low cost.

[0027] For most disc / ring-shaped rotating components, the tensile stress (i.e., helical stress) distributed along the circumference due to centrifugal effect is a key factor leading to fatigue damage and even failure. The peak of the helical tensile stress typically occurs in the inner bore region or near the core of the disc / ring part, thus becoming a high-risk area for crack initiation. This invention pre-applies an opposite compressive stress in the inner bore region of the disc / ring part to counteract the tensile stress generated during service, thereby improving the performance of the disc / ring part.

[0028] In some embodiments, the high-temperature alloy disc-ring component is a high-temperature alloy disc-shaped component and / or a high-temperature alloy ring-shaped component. It includes an inner hole region and a non-inner hole region, such as... Figure 1 As shown.

[0029] In some embodiments, the coating material used in the coating treatment includes at least one of ceramic fiber, glass fiber, and asbestos. Ceramic fiber, glass fiber, and asbestos have excellent thermal insulation and high-temperature performance, which can effectively reduce the heat transfer coefficient of the non-porous region of the high-temperature alloy disc-ring part, thereby effectively changing the distribution characteristics of its internal temperature field. In some embodiments, the coating material is ceramic fiber cloth, glass fiber cloth, and asbestos fiber cloth. The thickness of the coating material of the present invention can be adaptively adjusted according to the size of the high-temperature alloy disc-ring part, the solution temperature, and the aging temperature. In some embodiments, the thickness of the coating material is 10~20mm, for example, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, or 20mm.

[0030] In some embodiments, when the radial dimension of the high-temperature alloy disc-ring is small and the required cooling rate is low, forced cooling is performed using the single-phase medium. The single-phase medium is a gas, including air or nitrogen. In some embodiments, a high-temperature alloy disc-ring with a small radial dimension refers to a diameter ≤ 400 mm; a low cooling rate requirement refers to a cooling rate ≤ 50 °C / min. In some embodiments, the gas flow rate of the single-phase medium is 5~150 m / s, for example, 5 m / s, 10 m / s, 20 m / s, 30 m / s, 50 m / s, 60 m / s, 70 m / s, 100 m / s, 110 m / s, 120 m / s, 130 m / s, 150 m / s, etc. Suitable single-phase medium processing conditions can ensure the cooling effect and effectively change the distribution characteristics of its internal temperature field.

[0031] In some embodiments, when the radial dimension of the high-temperature alloy disc-ring part is large and a high cooling rate is required, forced cooling is performed using the two-phase medium. The two-phase cooling medium consists of a gas and atomized droplets; the gas is air or nitrogen. The liquid medium used for the atomized droplets is deionized water or quenching fluid. The atomization method includes pneumatic, pressure, centrifugal, and ultrasonic atomization. The atomized droplet particle size distribution ranges from 10 to 500 μm, for example, 10 μm, 20 μm, 50 μm, 100 μm, 200 μm, 300 μm, 400 μm, and 500 μm. The gas flow velocity in the two-phase medium is 5~150 m / s, for example, 5 m / s, 10 m / s, 20 m / s, 30 m / s, 50 m / s, 60 m / s, 70 m / s, 100 m / s, 110 m / s, 120 m / s, 130 m / s, 150 m / s, etc. Appropriate two-phase cooling treatment can ensure the cooling effect and effectively change the distribution characteristics of its internal temperature field.

[0032] In some embodiments, the material of the high-temperature alloy disc ring is, but is not limited to, GH4169, GH4065A, FGH4096, FGH4099, GH4251, GH4738, GH4720Li, GH4169D or FGH4095, and other high-temperature alloy grades are also applicable.

[0033] In some embodiments, the high-temperature alloy disc ring-shaped component includes, but is not limited to, high-pressure turbine discs, low-pressure turbine discs, turbine front sealing discs, large-size equal-thickness casings or irregular-shaped casings, and can also be applied to all ring-shaped components with a central hole structure, such as compressor discs, grate discs, disc-shaft integrated parts, and high-pressure turbine front / rear baffles.

[0034] In some embodiments, the solution heat treatment temperature is T-80℃ to T-10℃, where T is the complete dissolution temperature of the γ' phase or γ''; it can be obtained based on DSC (Differential Scanning Calorimetry) experiments or thermodynamic calculations. The solution heat treatment time is 0.5~6h (e.g., 0.5h, 1h, 2h, 3h, 4h, 5h, or 6h, etc.). The preferred solution heat treatment temperature is T-50℃ to T-20℃.

[0035] In some embodiments, the aging heat treatment method includes single-stage aging and two-stage aging; the temperature of the aging heat treatment is 600~900℃, such as 600℃, 650℃, 700℃, 800℃, 900℃, etc.; the time of the aging heat treatment is 1~24h, such as 1h, 2h, 5h, 7h, 9h, 10h, 15h, 20h or 24h, etc.

[0036] The following explanation, in conjunction with specific embodiments and comparative examples, will provide further details.

[0037] Example 1 A method for pre-setting residual stress in a high-temperature alloy ring-shaped component includes the following steps: (1) Pretreatment of the ring-shaped part to be heat-treated: Asbestos with a thickness of 15mm is pasted onto the non-inner hole area outside the inner hole area. A half-section diagram of the ring-shaped part is shown below. Figure 2 As shown, the material grade is GH4169.

[0038] (2) Solution heat treatment was performed on the high-temperature alloy ring-shaped parts. The solution heat treatment temperature was 980℃ and the holding time was 2h.

[0039] (3) The high-temperature alloy ring part after solution heat treatment is subjected to the first cooling. The single-phase medium used for the first cooling is air: air is used to accelerate the cooling of the inner hole area, and the wind speed is 40m / s.

[0040] (4) The ring-shaped part after the first cooling is subjected to aging heat treatment. The aging system is a two-stage aging process. The first stage aging heat treatment temperature is 720℃ and the holding time is 8h. The second stage aging heat treatment temperature is 620℃ and the holding time is 8h. The high-temperature alloy ring-shaped part after aging heat treatment is subjected to a second cooling process. The single-phase medium used for the second cooling is air: air is used to accelerate the cooling of the inner hole area, and the wind speed is 40m / s.

[0041] Example 2 A method for pre-setting residual stress in a high-temperature alloy disc-shaped component includes the following steps: (1) Pretreatment of the disc-shaped part to be heat-treated: Asbestos with a thickness of 15mm is pasted on the non-inner hole area outside the inner hole area. A half-section diagram of the disc-shaped part is shown below. Figure 4 As shown, the material grade is FGH4096.

[0042] (2) Solution heat treatment is performed on the high-temperature alloy disc-shaped parts. The solution heat treatment temperature is 1080~1150℃ and the holding time is 4h.

[0043] (3) The high-temperature alloy disc after solution heat treatment is subjected to the first cooling. The first cooling adopts a two-phase medium (gas mixed atomized droplets): the gas mixed atomized droplets are used to accelerate the cooling of the inner hole. The wind speed is 30m / s, the gas is air, the liquid medium used for atomized droplets is deionized water, and the atomized droplet particle size distribution range is 10~300μm.

[0044] (4) After the first cooling, the disc-shaped part is subjected to aging heat treatment. The aging regime is single-stage aging, the aging heat treatment temperature is 760℃, and the holding time is 8h. The high-temperature alloy disc-shaped part after aging heat treatment is subjected to a second cooling. The second cooling adopts a two-phase medium (gas mixed atomized droplets): the gas mixed atomized droplets are used to accelerate the cooling of the inner hole. The wind speed is 30m / s, the gas is air, the liquid medium used for atomized droplets is deionized water, and the atomized droplet particle size distribution range is 300~500μm.

[0045] Example 3 A method for pre-setting residual stress in a high-temperature alloy ring-shaped component includes the following steps: (1) Pretreatment of the ring-shaped part to be heat-treated: Ceramic fibers with a thickness of 15 mm are bonded to the non-internal hole area outside the internal hole area. A half-section diagram of the ring-shaped part is shown below. Figure 6 As shown, the material grade of the ring-shaped part is GH4169.

[0046] (2) Solution heat treatment was performed on the high-temperature alloy ring-shaped parts. The solution heat treatment temperature was 980℃ and the holding time was 2h.

[0047] (3) The high-temperature alloy ring part after solution heat treatment is subjected to the first cooling. The single-phase medium used for the first cooling is air: air is used to accelerate the cooling of the inner hole area, and the wind speed is 50m / s.

[0048] (4) The first cooled ring part is subjected to aging heat treatment. The aging system is two-stage aging. The first stage aging heat treatment temperature is 720℃ and the holding time is 8h. The second stage aging heat treatment temperature is 620℃ and the holding time is 8h. The high-temperature alloy ring part after aging heat treatment is subjected to second cooling. The single-phase medium used for the second cooling is air: air is used to accelerate the cooling of the inner hole area, and the wind speed is 40m / s.

[0049] Example 4 A method for pre-setting residual stress in a high-temperature alloy disc-shaped component includes the following steps: (1) Pretreatment of the disc-shaped part to be heat-treated: Ceramic fibers with a thickness of 15mm are bonded to the non-internal hole area outside the internal hole area. A half-section diagram of the disc-shaped part is shown below. Figure 8 As shown, the material grade of the disc-shaped component is FGH4095.

[0050] (2) Solution heat treatment is performed on the high-temperature alloy disc-shaped parts. The solution heat treatment temperature is 1080~1180℃ and the holding time is 2~6h.

[0051] (3) The high-temperature alloy disc after solution heat treatment is subjected to the first cooling. The first cooling adopts a two-phase medium (gas mixed atomized droplets): the gas mixed atomized droplets are used to accelerate the cooling of the inner hole. The wind speed is 60m / s, the gas is air, the liquid medium used for atomized droplets is deionized water, and the atomized droplet particle size distribution range is 300~500μm.

[0052] (4) The first cooled disc part is subjected to aging heat treatment. The aging regime is two-stage aging. The first stage aging heat treatment temperature is 840~870℃ and the holding time is 1.5h. The second stage aging heat treatment temperature is 630~650℃ and the holding time is 24h. The high-temperature alloy disc part after aging heat treatment is subjected to a second cooling. The second cooling adopts a two-phase medium (gas mixed atomized droplets): gas mixed atomized droplets are used to accelerate the cooling of the inner hole. The wind speed is about 60m / s. The gas is air. The liquid medium used for atomized droplets is deionized water. The atomized droplet particle size distribution range is 300~500μm.

[0053] Comparative Example 1 A method for pre-setting residual stress in a high-temperature alloy disc-shaped component includes the following steps: (1) The ring-shaped part (material grade GH4169) to be heat-treated was subjected to solution heat treatment. The solution heat treatment temperature was 980°C and the holding time was 2 hours.

[0054] (2) The high-temperature alloy ring-shaped part after solution heat treatment is first cooled by water quenching.

[0055] (3) The first cooled ring part is subjected to aging heat treatment. The aging system is two-stage aging. The first stage aging heat treatment temperature is 720℃ and the holding time is 8h. The second stage aging heat treatment temperature is 620℃ and the holding time is 8h. The high-temperature alloy ring part after aging heat treatment is subjected to second cooling: air cooling.

[0056] Comparative Example 2 A method for pre-setting residual stress in a high-temperature alloy disc-shaped component includes the following steps: (1) The disc-shaped part (material grade FGH4096) to be heat-treated was subjected to solution heat treatment. The solution heat treatment temperature was 1100℃ and the holding time was 4h.

[0057] (2) The high-temperature alloy disc after solution heat treatment is first cooled by oil quenching.

[0058] (4) After the first cooling, the disc-shaped part is subjected to aging heat treatment at a temperature of 760°C and a holding time of 8 hours. The high-temperature alloy disc-shaped part after aging heat treatment is then subjected to a second cooling: air cooling.

[0059] Experimental Example I. Measured residual stress distribution diagram of the ring-shaped component The internal chordal residual stress of the high-temperature alloy parts in the examples and comparative examples was measured using the "Profile Method for Determining Residual Stress in Disc-Ring Forgings of Metallic Materials" (TCSTM 00347-2020).

[0060] The ring-shaped component prepared using the method of Example 1 exhibits the following residual stress distribution characteristics: compressive stress exists on the surface and near the surface of the inner hole, while tensile stress exists internally, but the location of the maximum tensile stress is significantly shifted outwards. The maximum chordal stress value is below 300 MPa. The measured residual stress distribution diagram of the ring-shaped component obtained by the method of Example 1 is shown below. Figure 3 As shown.

[0061] The annular component obtained using the method in Comparative Example 1 exhibits the following residual stress distribution characteristics: compressive stress exists on and near the surface, while tensile stress exists internally. The maximum tensile stress is located near the inner hole of the annular component. The maximum residual tensile stress is approximately 400 MPa. The measured residual stress distribution diagram of the annular component obtained using the method in Comparative Example 1 is shown below. Figure 10 As shown.

[0062] The disk-shaped component prepared using the method of Example 2 exhibits the following residual stress distribution characteristics: compressive stress exists on the surface and near the surface of the inner hole, while tensile stress exists internally, but the location of the maximum tensile stress value is significantly shifted outwards. The maximum chordal stress value is below 200 MPa. The measured residual stress distribution diagram of the ring-shaped component obtained by the method of Example 2 is shown below. Figure 5 As shown.

[0063] The disk-shaped component prepared using the method of Comparative Example 2 exhibits the following residual stress distribution characteristics: compressive stress exists on and near the surface, while tensile stress exists internally. The maximum tensile stress is located near the inner hole of the disk-shaped component. The maximum residual tensile stress is approximately 300 MPa. The measured residual stress distribution diagram of the ring-shaped component obtained using the method of Comparative Example 2 is shown below. Figure 11 As shown.

[0064] The measured residual stress distribution diagram of the annular component obtained by the method in Example 3 is shown below. Figure 7 As shown, the maximum tensile stress in the core is less than 200 MPa.

[0065] The measured residual stress distribution diagram of the disc-shaped component obtained by the method in Example 4 is shown below. Figure 9 As shown, the maximum tensile stress in the core is less than 200 MPa.

[0066] II. Performance Comparison of Disc-type Components The characteristic simulation disk was tested and verified in accordance with the standard "Test Method for Over-rotation and Rupture of Aircraft Gas Turbine Engine Disk" (HB 20084-2012).

[0067] The test was conducted on the ZUST6D type vertical rotor low-cycle fatigue tester. This test bench has low-cycle fatigue testing capabilities, a simple speed-increasing system structure, and allows for high-speed loading and unloading; it adopts ultra-long-life high-speed bearings and high-efficiency damping vibration dampers, resulting in high system reliability.

[0068] The rotational speed-deformation diagram of the high-temperature alloy disc-shaped part prepared in Example 2 is shown below. Figure 12 As shown in the figure. The rotational speed-deformation diagram of the high-temperature alloy disc-shaped part prepared in Comparative Example 2 is shown in the figure. Figure 13 As shown, the yield speed of the disc-shaped part prepared by the method of Example 2 of the present invention is increased by 27.9% compared with the disc-shaped part prepared by the method of Comparative Example 2, specifically, from 44012 r / min to 56273 r / min; the speed corresponding to 1% plastic deformation is increased by 23.4% compared with the disc-shaped part prepared by Comparative Example 2, specifically, from 50190 r / min to 61910 r / min.

[0069] Finally, it should be noted that 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 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 of residual stress presetting of a high temperature alloy disk ring type piece, characterized in that, The method comprises the following steps: (a) performing a coating treatment on the non-hole area surface of the high-temperature alloy disc ring piece to reduce the heat exchange coefficient of the non-hole area surface during a heat treatment quenching process, to obtain a pretreated piece; (b) performing a solid solution heat treatment on the pretreated piece, and then performing a first forced cooling on the inner hole area of the pretreated piece after the solid solution heat treatment, wherein the cooling medium of the first forced cooling is a single-phase medium or a two-phase medium, to obtain a first treated piece; (c) performing an aging heat treatment on the first treated piece, and then performing a second forced cooling on the inner hole area of the first treated piece after the aging heat treatment, wherein the cooling medium of the second forced cooling is a single-phase medium or a two-phase medium.

2. The method of residual stress presetting of high-temperature alloy disk ring type pieces according to claim 1, characterized in that, The coating material used in the coating treatment comprises at least one of ceramic fiber, glass fiber and asbestos.

3. The method of residual stress presetting of high-temperature alloy disk ring hardware of claim 1, wherein, When the radial size of the high-temperature alloy disc ring piece is small and the cooling speed requirement is low, the single-phase medium is used for forced cooling; When the radial size of the high-temperature alloy disc ring piece is large and the cooling speed requirement is high, the two-phase medium is used for forced cooling.

4. The method of residual stress presetting of high-temperature alloy disk ring hardware of claim 1, wherein, The single-phase medium is a gas; and the gas comprises air or nitrogen.

5. The method of residual stress presetting of high-temperature alloy disk ring hardware of claim 4, wherein, The gas flow rate of the single-phase medium is 5-150 m / s.

6. The method of residual stress presetting of high-temperature alloy disk ring hardware of claim 1, wherein, The two-phase cooling medium is a gas and atomized liquid droplets; The gas comprises air or nitrogen; The particle size distribution range of the atomized liquid droplets is 10-500 μm.

7. The method of residual stress presetting of high-temperature alloy disk ring hardware of claim 6, wherein, The gas flow rate in the two-phase medium is 5-150 m / s.

8. The method of residual stress presetting of high-temperature alloy disk ring hardware of claim 1, wherein, The material of the high-temperature alloy disc ring piece comprises GH4169, GH4065A, FGH4096, FGH4099, GH4251, GH4738, GH4720Li, GH4169D or FGH4095; And / or, the high-temperature alloy disc ring piece comprises a high-pressure turbine disc, a low-pressure turbine disc, a turbine front sealing disc, a large-size equal-thickness machine case or a special-shaped machine case.

9. The method of residual stress presetting of high-temperature alloy disk ring hardware of claim 1 wherein, The temperature of the solid solution heat treatment is T-80℃ to T-10℃, and T is the complete resolubilization temperature of the γ' phase or the γ'' phase; and the time of the solid solution heat treatment is 0.5-6 h.

10. The method of residual stress presetting of high temperature alloy disk ring type pieces according to claim 1, characterized in that, The aging heat treatment mode comprises single-stage aging or multi-stage aging; The temperature of the aging heat treatment is 600-900℃, and the time of the aging heat treatment is 4-24 h.

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