Heat treatment and vibration aging comprehensive optimization method for wind power annular forgings

Abstract

The invention relates to the technical field of forging, in particular to a heat treatment and vibration aging comprehensive optimization method for a wind power annular forge piece, which comprises the following steps: acquiring a final-forged annular forge piece; the surface temperature of the annular forge piece is monitored after finish forging, after the surface temperature of the annular forge piece is reduced to be below the target surface temperature, furnace charging and residual temperature annealing are conducted, and rolling residual stress of a plurality of detection points of the annular forge piece is determined; reheating the annealed annular forge piece, preserving heat, transferring into a quenching tank, determining target transferring time of the annular forge piece according to the wall thickness of the forge piece, the real-time forge piece temperature and the environment wind speed, and determining optimal transferring time by combining the target transferring time and the wall thickness of the forge piece; tempering is conducted after quenching, vibration aging parameters are determined according to the tempering residual stress of the annular forge piece, and vibration aging treatment is conducted; and after processing, determining correction parameters and correction values according to a comparison result of the vibration residual stress and preset residual stress. Residual stress is effectively eliminated, and the deformation rate of the annular forge piece is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of forging, and particularly to a comprehensive optimization method for heat treatment and vibration aging of wind power ring forgings. Background Art

[0002] Wind power low-alloy high-strength steel material is a kind of metal material specially used for manufacturing wind power equipment, with characteristics such as high strength, good toughness and fatigue resistance. It is widely used in the wind power field to manufacture key components such as tower barrel flanges, yaw gear rings and pitch bearings. These ring forgings are prone to generate uneven circumferential stress after rolling. Although the deformation degree after ring rolling is small, stress will be released after subsequent heat treatment, resulting in large deformation of the forgings, seriously affecting the processing quality and accuracy, and increasing the subsequent processing difficulty and production cost.

[0003] Chinese Patent Application Publication No.: CN117123726A discloses a method for stress-relieving forging of superalloy ring parts, including: cutting according to process requirements; heating and raising the temperature of the blank to 1040°C - 1120°C with a high-temperature gas furnace, holding for 2 to 3.5 hours, taking out the blank and transporting it to the press, and upsetting and punching the blank; heating and raising the temperature of the ring forging after punching to 980°C - 1060°C with a high-temperature gas furnace, holding for 0.5 to 2 hours, transferring the forging to the ring rolling mill for multi-pass ring rolling, controlling the ring rolling feed speed to be greater than 1.3 mm / s, controlling the deformation amount to be less than 25%, and controlling the finish forging temperature to be above 750°C; performing heat treatment on the ring forging with a heat treatment furnace, holding at 950°C - 1000°C for 1 - 2 hours and then taking it out of the furnace for air cooling or water cooling; performing cold expansion on the product after solution heat treatment, controlling the expansion deformation amount to be 0.2% - 0.5%; performing aging heat treatment on the forging after cold expansion with a heat treatment furnace, maintaining at 700°C - 740°C for 7 - 9 hours and then cooling the furnace to 600°C - 640°C, and holding at 600°C - 640°C for 7 - 9 hours and then taking it out of the furnace for air cooling.

[0004] It can be seen that although the above technical solution can change the stress direction by precisely controlling the deformation amount, maximize the dimensional accuracy and shape stability of the ring part, and solve the processing deformation problem of the forging caused by residual stress during processing. However, there are still the following problems: during heating, cooling and processing, the tissue transformation and deformation of each part of the forging are not absolutely uniform, and there is still non-uniformity at the microscopic level, and there is still a small amount of residual stress remaining. Summary of the Invention

[0005] Therefore, the present invention provides a comprehensive optimization method for heat treatment and vibration aging of wind power ring forgings to make up for the insufficient stress elimination at the microscopic level by combining the vibration aging method and overcome the problem of unstable residual stress inside the forging after single heat treatment of the ring forging in the prior art.

[0006] To achieve the above object, the present invention provides a comprehensive optimization method for heat treatment and vibration aging of wind power ring forgings, including:

[0007] Obtaining the ring forging after final forging;

[0008] Monitoring the surface temperature of the ring forging after final forging, and after the surface temperature drops below the target surface temperature, loading it into the furnace for post-heating annealing, and determining the rolling residual stress of the ring forging based on several detection points;

[0009] Heating the annealed ring forging to the target heating temperature, holding the temperature, and then transferring it to the quenching tank. During the transfer process, determine the target transfer time of the ring forging according to the wall thickness of the forging, the real-time forging temperature, and the environmental wind speed, and determine the optimal transfer time of the ring forging according to the wall thickness of the forging and the target transfer time;

[0010] Performing tempering treatment on the ring forging after quenching, determining the tempering residual stress of the ring forging at each of the detection points after tempering, and determining the optimal vibration aging parameters according to the tempering residual stress to perform vibration aging treatment on the ring forging;

[0011] After the vibration aging treatment, detecting the vibration residual stress at each of the detection points, and determining to adjust the vibration aging parameters or the heat treatment parameters according to the vibration residual stress and the preset residual stress;

[0012] Wherein, the vibration aging parameters include exciting force and exciting frequency.

[0013] Further, determining the optimal transfer time of the ring forging includes:

[0014] After annealing, determining the real-time forging temperature, environmental temperature, and environmental wind speed corresponding to several detection points on the ring forging at several detection time points;

[0015] Constructing a heat balance equation according to the real-time forging temperature, the environmental wind speed, and the wall thickness of the forging;

[0016] Determining the target transfer time of the ring forging according to the forging inlet temperature and the heat balance equation;

[0017] Determining the optimal transfer time according to the wall thickness of the forging and the target transfer time.

[0018] Further, determining the target transfer time of the ring forging includes:

[0019] Determining the convective heat transfer coefficient according to the environmental wind speed, the wall thickness of the forging, and the air thermal conductivity;

[0020] Establish a heat balance equation based on the forging weight, the convective heat transfer coefficient, the ambient temperature, and the real-time forging temperature, and determine the target transfer time of the ring-shaped forging through the heat balance equation and the forging inlet temperature.

[0021] Further, determining the optimal transfer time according to the forging wall thickness and the target transfer time includes:

[0022] Determine the target wall thickness range corresponding to the ring-shaped forging based on the preset wall thickness division rule and the forging wall thickness;

[0023] Determine the empirical transfer time of the ring-shaped forging according to the target wall thickness range;

[0024] Combine the target transfer time and the empirical transfer time to determine the optimal transfer time;

[0025] Wherein, the forging wall thickness is positively correlated with the empirical transfer time.

[0026] Further, determining the empirical transfer time of the ring-shaped forging according to the determination result of whether the target wall thickness range corresponding to the forging wall thickness belongs to the minimum wall thickness range includes:

[0027] If the target wall thickness range belongs to the minimum wall thickness range, it is determined that the empirical transfer time of the ring-shaped forging is the preset transfer time;

[0028] If the target wall thickness range does not belong to the minimum wall thickness range, it is determined that the empirical transfer time of the ring-shaped forging increases according to the preset time increment rule based on the preset transfer time.

[0029] Further, determining the optimal vibration aging parameters includes:

[0030] Construct a stress model according to a number of preset vibration aging parameter combinations and the tempering residual stress to determine the simulated residual stress of the ring-shaped forging under vibration aging treatment;

[0031] Determine the optimal vibration aging parameters according to the simulated residual stress and the preset residual stress;

[0032] Wherein, the preset vibration aging parameter combination includes a preset exciting force and a preset exciting frequency.

[0033] Further, determining the optimal vibration aging parameters further includes:

[0034] Determine the simulated stress gap according to the simulated residual stress and the preset residual stress;

[0035] Arrange the simulated stress gaps corresponding to each preset vibration aging parameter combination in order, and select the combination of preset vibration aging parameters with the smallest simulated stress gap as the optimal vibration aging parameters.

[0036] Further, it is determined to adjust the vibration aging parameters, including:

[0037] Determine the stress distribution state of the ring forging according to the vibration residual stress at several detection points, including uniform distribution and non-uniform distribution;

[0038] Determine to adjust the vibration aging parameters according to the stress distribution state and the stress difference between the vibration residual stress and the preset residual stress, and determine the correction amount of the vibration aging parameters;

[0039] Wherein, if the stress distribution state is non-uniform distribution and the average value of the stress difference is less than or equal to the preset stress threshold, it is determined to adjust the vibration aging parameters.

[0040] Further, it is determined to adjust the heat treatment parameters, including:

[0041] If the stress distribution state is non-uniform distribution and the average value of the stress difference is greater than the preset stress threshold, it is determined to adjust the heat treatment parameters, and adjust the quenching liquid temperature or the post-heat treatment annealing time.

[0042] Further, it also includes:

[0043] After determining to adjust the vibration aging parameters or the heat treatment parameters, determine the correction amount of the corresponding parameters according to the correction parameter, the average value of the stress difference, and the preset stress threshold, wherein,

[0044] If the correction parameter is the vibration aging parameter, it is determined to increase the exciting force, determine the correction coefficient according to the average value of the stress difference and the preset stress threshold, and determine the correction amount of the exciting force according to the correction coefficient and the exciting force;

[0045] If the correction parameter is the quenching liquid temperature or the post-heat treatment annealing time, increase the quenching liquid temperature or extend the post-heat treatment annealing time, and determine the temperature correction amount or the time correction amount according to the correction coefficient.

[0046] Compared with the prior art, the beneficial effects of the present invention are as follows. The present invention adopts a combination scheme of heat treatment process and vibratory stress relief. Through post-heat-treatment annealing and quenching processes, combined with determining the optimal transfer time based on the wall thickness, the thermal stress and tissue stress during the heat treatment of wind power ring forgings are effectively reduced, and the probability of forging deformation is lowered. At the same time, vibratory stress relief treatment is combined to further eliminate the residual stress of the ring forging, and the vibratory residual stress is determined to verify the stress relief effect to realize the correction of relevant parameters in the heat treatment and vibratory stress relief treatment, forming an integrated closed-loop control, achieving precise regulation of residual stress and optimization of tissue properties, combining the economy of the production process and the efficiency of actual deformation control, significantly improving the strength, fatigue life and dimensional accuracy of the forging, and providing technical support for the efficient and reliable manufacturing of key components of large-megawatt models in the wind power industry.

[0047] Further, the present invention considers the wall thickness difference of the forging type of the ring forging, constructs a heat balance equation to accurately determine the transfer time for transferring the ring forging to the quenching tank, avoiding the occurrence of phenomena such as insufficient stress relief or the generation of new stress due to excessive cooling caused by premature or late transfer of the ring forging, ensuring that the ring forging is in a reasonable temperature state before quenching, and ensuring that the ring forging can achieve the expected phase transformation during the quenching process, thereby improving the overall mechanical properties of the forging and meeting the high-load operation requirements of wind power equipment.

[0048] Further, the present invention jointly determines the optimal transfer time of the ring forging by combining the empirical transfer time and the target transfer time. On the one hand, the empirical transfer time is differentially set according to factors such as the wall thickness of the forging, making full use of historical production experience and process characteristics, and can quickly give the basic transfer time that meets forgings with different wall thicknesses, ensuring the heat treatment effect under normal conditions; on the other hand, the target transfer time is accurately calculated through a heat balance equation, comprehensively considering real-time parameters such as environmental wind speed, forging wall thickness, and air thermal conductivity, scientifically predicting the best slotting time, and ensuring accurate control of the quenching temperature. The combination of the two can effectively reduce quality problems such as residual stress, deformation, and cracking caused by improper transfer time, reduce the deformation rate, and significantly improve the heat treatment quality and performance stability of the ring forging.

[0049] Further, through a stress model and simulation calculation, the present invention can accurately select vibratory stress relief parameters according to the actual tempering residual stress and the preset residual stress target benchmark of the ring forging, effectively improving the residual stress relief efficiency, making the forging residual stress closer to the ideal state, reducing quality problems such as deformation and cracking of the ring forging caused by residual stress, improving the dimensional stability and anti-fatigue performance of the ring forging, enhancing the reliability and safety of the wind power ring forging during the operation of wind power equipment, and extending the service life.

[0050] Furthermore, the present invention performs hierarchical judgment based on the stress distribution state and the mean value of stress differences, and specifically selects correction parameters: when the stress distribution is uneven but the difference is small, the vibration aging parameters are preferentially adjusted, which can rapidly improve the stress distribution through refined vibration control without changing the overall heat treatment system; while when the stress difference is large, the correction direction is turned to the quenching liquid temperature or the residual heat annealing time, and the key parameters in the heat treatment process are adjusted from the root to ensure that the stress can be more thoroughly eliminated. It avoids the waste of resources caused by blindly adjusting parameters, effectively eliminates the residual stress of the ring forgings, reduces the deformation rate, and further meets the strict requirements for high precision of components in the manufacturing of high-end equipment such as wind power. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a flowchart of the heat treatment and vibration aging comprehensive optimization method for the wind power ring forgings in the embodiment of the present invention;

[0052] Figure 2 is a step diagram for determining the transfer time of the ring forgings in the embodiment of the present invention;

[0053] Figure 3 is a step diagram for determining the vibration aging parameters in the embodiment of the present invention;

[0054] Figure 4 is a determination diagram for determining the correction parameters in the embodiment of the present invention;

[0055] Figure 5 is a schematic diagram of the stress detection positions of the test piece 2# in Example 1;

[0056] Figure 6 is a stress distribution broken line diagram of the test piece 2# under various treatment conditions in Examples 1 to 2. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] In order to make the purpose and advantages of the present invention clearer, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0058] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and do not limit the protection scope of the present invention.

[0059] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0060] Please refer to Figure 1 as shown, which is a step diagram of the comprehensive optimization method for heat treatment and vibration aging of the wind power ring forging of the present invention. Specifically, an embodiment of the present invention provides a comprehensive optimization method for heat treatment and vibration aging of a wind power ring forging, including:

[0061] Step S1, obtaining the ring forging after final forging;

[0062] Step S2, monitoring the surface temperature of the ring forging after final forging, and after the surface temperature drops below the target surface temperature, loading it into the furnace for post-heat annealing, and determining the rolling residual stress of the ring forging based on several detection points;

[0063] Step S3, heating the annealed ring forging to the target heating temperature, and after holding the temperature, transferring it to the quenching tank. During the transfer process, determine the target transfer time of the ring forging according to the wall thickness of the forging, the real-time forging temperature, and the ambient wind speed, and determine the optimal transfer time of the ring forging according to the wall thickness of the forging and the target transfer time;

[0064] Step S4, performing tempering treatment on the ring forging after quenching, determining the tempering residual stress of the ring forging at each of the detection points after tempering, and determining the optimal vibration aging parameters according to the tempering residual stress to perform vibration aging treatment on the ring forging;

[0065] Step S5, after vibration aging treatment, detecting the vibration residual stress at each of the detection points, and determining to adjust the vibration aging parameters or adjust the heat treatment parameters according to the vibration residual stress and the preset residual stress;

[0066] Wherein, the vibration aging parameters include exciting force and exciting frequency.

[0067] It can be understood that the internal tissue area of the ring forging can be stabilized by post-heat annealing, quenching and tempering, reducing the material hardness and brittleness. During the forging process of the ring forging, the atomic arrangement inside the metal will be distorted due to external force, generating residual stress. Immediately after final forging, post-heat annealing is carried out, and annealing using the waste heat of the forging can eliminate the uneven residual stress generated during the rolling process, so as to reduce the stress increment caused by the subsequent heat treatment temperature difference. Although the post-heat annealing temperature is not as high as the heating temperature, it can still provide enough energy for atoms to diffuse and reduce the residual stress. Heat treatment (annealing, quenching) is difficult to completely eliminate the residual stress of the ring forging, especially in the stress concentration areas such as corners and holes. By combining vibration aging, through mechanical vibration, the stress in these areas can be further relaxed, thereby improving the stress distribution uniformity.

[0068] It can be understood that heat treatment can macroscopically change the metal structure through processes such as heating and cooling to eliminate residual stress, while vibration aging releases stress by causing plastic deformation of the metal in the stress concentration area at the microscopic level through vibration. The combination of the two can comprehensively treat the residual stress of the ring forging from different angles and scales, more comprehensively and effectively reduce the residual stress, improve the quality and performance of the ring forging, and meet the production needs of parts with high requirements for dimensional accuracy, stability and reliability such as wind power ring forgings.

[0069] It can be understood that the transfer time is the time when the annealed ring forging is reheated to the target heating temperature, held for a certain time and then transferred to the quenching tank. The transfer time will affect the temperature state of the ring forging during quenching. If the transfer time is too long, the temperature of the ring forging will be too low, resulting in insufficient quenching cooling rate and unable to obtain ideal organizational structure and performance, such as insufficient hardness and strength; if the transfer time is too short, the temperature of the forging will be too high, which will cause too large quenching stress and increase the risk of forging deformation and even cracking. By determining the optimal transfer time of the ring forging according to factors such as the wall thickness of the forging, the real-time forging temperature and the ambient wind speed, it can ensure that the forging is at the optimal temperature when entering the quenching tank, so as to obtain good quenching effect, avoid the superposition of thermal stress and internal tissue stress of the ring forging, and reduce the residual stress level of the forging.

[0070] It can be understood that by determining the correction parameters and correction amounts based on the vibration residual stress and the preset residual stress and performing corrections, the residual stress can be effectively reduced, the deformation rate of the ring forging can be decreased, and the controllability of the production process can be enhanced.

[0071] In a specific embodiment, the blank can be heated to a preset temperature range, held for a certain time and then taken out for upsetting and punching to form; the blank after punching and forming is heated again to the preset temperature range for ring rolling finish forging to obtain a ring forging; the blank of the wind power ring forging is made of low-alloy high-strength steel material such as Q295. The value of the preset temperature range is 1040 °C to 1120 °C, the annealing temperature is 680 °C, and the temperature of the quenching liquid is 20 - 50 °C; the target surface temperature is below the recrystallization temperature of the ring forging, and the target surface temperature is 550 - 600 °C. The condition for loading the furnace is that the surface temperature of the ring forging drops below the target surface temperature. The annealing temperature of 680 °C is higher than the recrystallization temperature, which can ensure more thorough elimination of residual stress and make the grains uniform. The specific preparation process is that after finish forging, it is cooled to the target surface temperature of 550 - 600 °C (at this time, the core is close to or slightly lower than 680 °C), and after loading the furnace, the ring forging is heated to 680 °C by using the waste heat + furnace temperature compensation, so as to fully recrystallize and eliminate the residual stress of the ring forging.

[0072] In another specific embodiment, the several detection points may be the inner side surface and the end surface of the annular cross-section of the annular forging. The annular forging is divided into several detection points at an angle of 60°. The value range of the target heating temperature is 30-50°C above AC3, where AC3 is the austenitizing temperature. In practice, the preset temperature range, the value range and the preferred value of the target surface temperature and the target heating temperature, as well as the determination method of the several detection points can be determined according to the actual situation, and no specific limitation is made here and will not be elaborated further.

[0073] The present invention adopts a combined scheme of heat treatment process and vibration aging. Through post-heat treatment annealing and quenching processes, combined with determining the best transfer time based on the wall thickness, the thermal stress and structure stress of the wind power annular forging during the heat treatment process are effectively reduced, and the deformation probability of the forging is decreased. At the same time, the vibration aging treatment is combined to further eliminate the residual stress of the annular forging, and the vibration residual stress is determined to verify the stress elimination effect to realize the correction of relevant parameters in the heat treatment and vibration aging treatment, forming an integrated closed-loop control, realizing the precise control of the residual stress and the optimization of the structure performance, and having both the economy of the production process and the high efficiency of the actual deformation control, significantly improving the strength, fatigue life and dimensional accuracy of the forging, providing technical support for the efficient and reliable manufacturing of key components of large megawatt models in the wind power industry.

[0074] Please refer to Figure 2 as shown, which is a step diagram for determining the transfer time of the annular forging in the embodiment of the present invention. Specifically, to determine the best transfer time of the annular forging, step S4 includes:

[0075] Step S31, after annealing, determine the real-time forging temperature, ambient temperature and ambient wind speed corresponding to several detection points on the annular forging at several detection time points;

[0076] Step S32, construct a heat balance equation according to the real-time forging temperature, the ambient wind speed and the forging wall thickness;

[0077] Step S33, determine the target transfer time of the annular forging according to the forging slotting temperature and the heat balance equation;

[0078] Step S34, determine the best transfer time according to the forging wall thickness and the target transfer time.

[0079] It can be understood that the wall thickness difference of the ring forging will lead to different internal stress distributions. The thicker ring forging has more obvious uneven shrinkage during cooling, which is prone to generate large internal stresses. By considering the wall thickness and determining the thermal state change of the ring forging according to the heat balance equation to determine the optimal transfer time, new stresses can be avoided. The ambient wind speed will affect the heat dissipation rate on the surface of the ring forging. By combining the real-time forging temperature at several detection points and the ambient wind speed, the cooling state of the forging after annealing can be determined in real time, which is convenient for subsequently establishing a heat balance equation to describe the heat transfer and balance relationship during the cooling process of the ring forging, so as to more deeply analyze the law of thermal state change of the forging at different times.

[0080] It can be understood that the optimal transfer time is crucial for ensuring the quality of the ring forging. If the transfer time is too early, the internal stress of the forging may not be fully eliminated, and new stresses will be generated again during subsequent processing. If the transfer time is too late, it will cause the forging to be over-cooled, generating new stresses or affecting production efficiency. By using the heat balance equation in combination with the forging inlet temperature and wall thickness to determine the optimal transfer time, the forging can reach an ideal state during the cooling process.

[0081] In a specific embodiment, if the temperature of the forging when it enters the quenching tank is lower than AC3, it will cause part of the austenite to transform into pearlite or bainite in advance, resulting in non-uniform structure after quenching and generating new stresses. In view of the fact that the temperature will be lost during the process of transferring the ring forging from annealing heating and holding to the quenching tank, preferably, the temperature of the forging when it enters the quenching tank is lower than the target heating temperature, and the forging inlet temperature is 5°C to 30°C (excluding 30°C) above AC3. In practice, the forging inlet temperature can be determined according to the actual situation, or it can be determined according to the rolling residual stress determined above. Preferably, the higher the rolling residual stress, the lower the forging inlet temperature should be selected, and it should meet the temperature range of the forging inlet temperature, which will not be elaborated here.

[0082] The present invention considers the differences in forging type and wall thickness of the ring forging, constructs a heat balance equation to accurately determine the transfer time for transferring the ring forging to the quenching tank, avoids the phenomenon of insufficient stress elimination or over-cooling to generate new stresses caused by transferring the ring forging too early or too late, ensures that the ring forging is in a reasonable temperature state before quenching, and guarantees that the ring forging can achieve the expected phase transformation during the quenching process, thereby improving the overall mechanical properties of the forging and meeting the high-load operation requirements of wind power equipment.

[0083] Specifically, in the step S42, determining the target transfer time of the ring forging includes:

[0084] Determining the convective heat transfer coefficient according to the ambient wind speed, the forging wall thickness and the air thermal conductivity;

[0085] Establish a heat balance equation based on the forging weight, the convective heat transfer coefficient, the ambient temperature, and the real-time forging temperature;

[0086] Determine the target transfer time of the ring forging through the heat balance equation and the forging slotting temperature.

[0087] It can be understood that the ambient wind speed is positively correlated with the convective heat transfer coefficient. The greater the ambient wind speed, the stronger the heat exchange between the air and the surface of the ring forging, and the greater the convective heat transfer coefficient; the wall thickness of the ring forging will affect the rate of heat transfer from the inside of the ring forging to the surface, and thus will also affect the heat exchange with the air; the air thermal conductivity is a physical quantity that measures the heat conduction ability of the air and is directly involved in the calculation of the convective heat transfer coefficient.

[0088] It can be understood that according to the law of conservation of energy, during the transfer process of the forging, the change in its heat is equal to the difference between the incoming heat and the outgoing heat. The incoming heat mainly comes from the initial heat of the forging itself and is determined by the forging weight, specific heat capacity, and real-time forging temperature; the outgoing heat is transferred to the surrounding environment through convective heat transfer and is related to the convective heat transfer coefficient, forging surface area, ambient temperature, and real-time forging temperature.

[0089] In a specific embodiment, the forging wall thickness d is the cross-sectional thickness of the ring forging, and the calculation formula for the convective heat transfer coefficient h is as follows:

[0090]

[0091] Among them, α is the air thermal conductivity, Re is the Reynolds number, Pr is the Prandtl number of the air, with a value of 0.7 - 0.8, n is an exponent related to the flow state and heat flow conditions, n has a value of 0.35, and the Reynolds number is determined according to the ambient wind speed.

[0092] Let the forging mass of the ring forging be m, the specific heat capacity be c, the average value of the real-time forging temperature be T, the ambient temperature be , the forging surface area be A, and the time be t, then the heat balance equation is constructed as follows:

[0093] ,

[0094] Among them, the is the real-time ambient temperature;

[0095] The heat balance equation can be integrated and solved. Combining the initial conditions, that is, the average value of the real-time forging temperature and the ambient temperature Obtain the functional relationship between the forging temperature and the transfer time. Let the temperature in the functional relationship be the forging slotting temperature, then the target transfer time of the ring forging can be solved.

[0096] Specifically, in the step S3, determining the optimal transfer time according to the wall thickness of the forging and the target transfer time includes:

[0097] Determining the target wall thickness range corresponding to the ring-shaped forging based on a preset wall thickness division rule and the wall thickness of the forging;

[0098] Determining the empirical transfer time of the ring-shaped forging according to the target wall thickness range;

[0099] Determining the optimal transfer time by combining the target transfer time and the empirical transfer time;

[0100] Wherein, the wall thickness of the forging is positively correlated with the empirical transfer time.

[0101] Specifically, in step S3, determining the empirical transfer time of the ring-shaped forging according to the determination result of whether the target wall thickness range corresponding to the wall thickness of the forging belongs to the minimum wall thickness range includes:

[0102] If the target wall thickness range belongs to the minimum wall thickness range, it is determined that the empirical transfer time of the ring-shaped forging is the preset transfer time;

[0103] If the target wall thickness range does not belong to the minimum wall thickness range, it is determined that the empirical transfer time of the ring-shaped forging increases according to a preset time increment rule based on the preset transfer time.

[0104] It can be understood that by comparing the known wall thickness of the forging with the preset minimum wall thickness range, if the wall thickness of the forging belongs to the minimum wall thickness range, it means that the heat transfer and microstructure transformation during the heat treatment process of the forging are relatively easy to control and close to the ideal state, then the preset transfer time is directly used as the empirical transfer time; if the wall thickness of the forging does not belong to the minimum wall thickness range, it means that the wall thickness of the forging exceeds the ideal treatment range. Due to the increase in wall thickness, the heat transfer speed inside the ring-shaped forging slows down. In order to ensure the heat treatment effect, more time needs to be given for the internal structure of the forging to be fully homogenized. Therefore, based on the preset transfer time, the transfer time can be increased according to the preset time increment rule to obtain the empirical transfer time.

[0105] In a specific embodiment, the preset wall thickness division rule is to divide based on 10 cm as the division benchmark. Based on the preset wall thickness division rule and the wall thickness of the forging, the target wall thickness range of the ring-shaped forging is determined, and the transfer time corresponding to this target wall thickness range is the empirical transfer time of the ring-shaped forging. The minimum wall thickness range takes values from 5 cm to 15 cm, and the corresponding preset transfer time takes values in the range of 90 to 110 s. Preferably, the preset transfer time takes the value of 100 s.

[0106] In another specific embodiment, the optimal transfer time is the weighted sum of the target transfer time and the empirical transfer time. The first weight corresponding to the empirical transfer time is 0.6 - 0.8. Preferably, the first weight is 0.7. The second weight corresponding to the target transfer time is 0.2 - 0.4. Preferably, the second weight is 0.3. The optimal transfer time = the first weight × the empirical transfer time + the second weight × the target transfer time, and the sum of the first weight and the second weight is 1. In practice, the value ranges and preferred values of the first weight and the second weight can be determined according to the actual situation, which are not specifically limited here and will not be elaborated further.

[0107] In another specific embodiment, the preset time increment rule is to divide the wall thickness range based on 10 cm as the benchmark, and based on the smallest wall thickness range, the transfer time between adjacent wall thickness ranges increases by 10 s - 60 s. Preferably, the increment time value is 30 s. In practice, the value range and preferred value of the increment time can be determined according to the actual situation, which are not specifically limited here and will not be elaborated further.

[0108] The present invention combines the empirical transfer time and the target transfer time to jointly determine the optimal transfer time of the ring forging. On the one hand, the empirical transfer time is differentially set according to factors such as the wall thickness of the forging, making full use of historical production experience and process characteristics, and can quickly give the basic transfer time that conforms to forgings with different wall thicknesses, ensuring the heat treatment effect under normal conditions. On the other hand, the target transfer time is accurately calculated through the heat balance equation, comprehensively considering real-time parameters such as environmental wind speed, forging wall thickness, and air thermal conductivity, scientifically predicting the best slotting time, and ensuring that the quenching temperature is accurately controllable. The combination of the two can effectively reduce quality problems such as residual stress, deformation, and cracking caused by improper transfer time, reduce the deformation rate, and significantly improve the heat treatment quality and performance stability of the ring forging.

[0109] Please refer to Figure 3 as shown, which is a step diagram for determining the vibration aging parameters in the embodiment of the present invention. Specifically, in step S4, determining the optimal vibration aging parameters includes:

[0110] Step S41, constructing a stress model according to a number of preset vibration aging parameter combinations and the tempering residual stress;

[0111] Step S42, determining the simulated residual stress of the ring forging under vibration aging treatment according to the stress model;

[0112] Step S43, determining the optimal vibration aging parameters according to the simulated residual stress and the preset residual stress;

[0113] Among them, the preset vibration aging parameter combination includes a preset exciting force and a preset exciting frequency.

[0114] Specifically, determining the optimal vibration aging parameters further includes:

[0115] Determining the simulated stress difference according to the simulated residual stress and the preset residual stress;

[0116] Arranging the simulated stress differences corresponding to each preset vibration aging parameter combination in order, and selecting the combination of preset vibration aging parameters with the smallest simulated stress difference as the optimal vibration aging parameters.

[0117] It can be understood that after heat treatment processes such as post-weld annealing, quenching, and tempering, there is still a certain amount of tempering residual stress inside the ring forgings. Therefore, through vibration aging treatment, further elimination of the residual stress can be achieved. By constructing a stress model based on different preset vibration aging parameters and tempering residual stress, the simulated residual stress of the ring forgings after vibration aging treatment under corresponding parameters can be calculated, and the residual stress level of the ring forgings after vibration aging treatment can be predicted in advance. Furthermore, the simulated residual stress and the preset residual stress are compared, and the preset vibration parameters with the smallest stress difference are used as the optimal vibration aging parameters. Moreover, in the present invention, placing the vibration aging treatment after quenching and tempering can significantly control the deformation amount of the ring forgings.

[0118] In a specific embodiment, the preset vibration aging parameter combinations are as shown in Table 1 below:

[0119] Table 1 Preset vibration aging parameter combinations

[0120]

[0121] In another specific embodiment, based on knowledge such as elasticity mechanics, material mechanics, and vibration theory, considering the stress change mechanism during the vibration aging process, a stress model is constructed according to the empirical formula and theoretical analysis as follows:

[0122]

[0123] Wherein, is the simulated residual stress, is the tempering residual stress, H is the preset exciting force, is the preset exciting frequency, is the exciting period, E is the elastic modulus of the ring forging material, v is the Poisson's ratio, and d is the wall thickness of the ring forging.

[0124] Based on the stress model, the ring forging is subjected to vibratory stress relieving treatment with the preset vibratory stress relieving parameter combination. After the vibratory stress relieving treatment, simulated residual stress can be obtained. The value range of the preset residual stress is 8% - 15% of the yield strength of the ring forging material. Preferably, the value of the preset residual stress is 12%. Stress difference = simulated residual stress - preset residual stress. Arrange the stress differences corresponding to several preset vibratory stress relieving parameter combinations in descending order, and select the preset vibratory stress relieving parameter combination corresponding to the minimum stress difference as the vibratory stress relieving parameter. In implementation, the selection of the preset vibratory stress relieving parameter combination, the construction of the stress model, as well as the value range and preferred value of the preset residual stress can all be determined according to the actual situation, which is not specifically limited here and will not be elaborated further.

[0125] Through the stress model and simulation calculation, the present invention can accurately select the vibratory stress relieving parameters according to the actual tempering residual stress and the preset residual stress target benchmark of the ring forging, effectively improve the residual stress elimination efficiency, make the residual stress of the forging closer to the ideal state, reduce the deformation and cracking quality problems of the ring forging caused by the residual stress, improve the dimensional stability and fatigue resistance of the ring forging, enhance the reliability and safety of the wind power ring forging during the operation of the wind power equipment, and extend the service life.

[0126] Please refer to Figure 4 as shown, which is a determination diagram for determining the correction parameters in the embodiment of the present invention; specifically, in step S5, determining the adjustment of the vibratory stress relieving parameters and the adjustment of the heat treatment parameters includes:

[0127] Determine the stress distribution state of the ring forging according to the vibratory residual stress at several detection points, including uniform distribution and non-uniform distribution;

[0128] Determine the adjustment of the vibratory stress relieving parameters according to the stress distribution state and the stress difference between the vibratory residual stress and the preset residual stress, and determine the correction amount of the vibratory stress relieving parameters;

[0129] Among them, if the stress distribution state is non-uniform distribution and the average value of the stress difference is less than or equal to the preset stress threshold, it is determined to adjust the vibratory stress relieving parameters;

[0130] If the stress distribution state is non-uniform distribution and the average value of the stress difference is greater than the preset stress threshold, it is determined to adjust the heat treatment parameters, and adjust the quenching liquid temperature or the post-heat treatment annealing time;

[0131] It can be understood that the average stress difference value is the average stress difference between the vibration residual stress corresponding to a number of detection points and the preset residual stress. When the stress distribution state is non-uniform, it indicates that there is an imbalance in the stress distribution inside the ring forging. If the average stress difference value is less than or equal to the preset stress threshold at this time, it means that the current vibration aging parameters have made the vibration residual stress close to the preset residual stress as a whole. It's just that the residual stress distribution of the ring forging is non-uniform after vibration treatment. Then, the vibration aging parameters are used as correction parameters to improve the stress distribution uniformity by further adjusting the vibration aging parameters. If the average stress difference value is greater than the preset stress threshold, it indicates that the current stress state is not only non-uniformly distributed, but also there is a large gap between the overall stress level and the preset value. It is necessary to start from fundamental aspects such as adjusting the quenching liquid temperature or the post-heat treatment annealing time to make a more comprehensive adjustment to the internal structure and stress state of the ring forging, so as to achieve the purpose of both improving the stress distribution uniformity and making the stress level meet the preset requirements.

[0132] In a specific embodiment, the stress standard deviation and the stress mean value are determined based on the vibration residual stress of a number of detection points. If the stress standard deviation ≤ 10% of the stress mean value, the stress distribution state is uniform distribution; otherwise, it is non-uniform distribution.

[0133] Specifically, it further includes: determining a correction amount according to the correction parameter, the average stress difference value, and the preset stress threshold, including:

[0134] After determining to adjust the vibration aging parameters or the heat treatment parameters, the correction amount of the corresponding parameters is determined according to the correction parameter, the average stress difference value, and the preset stress threshold, where

[0135] If the correction parameter is the vibration aging parameter, it is determined to increase the exciting force. The correction coefficient is determined according to the average stress difference value and the preset stress threshold, and the correction amount of the exciting force is determined according to the correction coefficient and the exciting force;

[0136] If the correction parameter is the quenching liquid temperature or the post-heat treatment annealing time, the quenching liquid temperature is increased or the post-heat treatment annealing time is extended, and the temperature correction amount or the time correction amount is determined according to the correction coefficient.

[0137] It can be understood that the exciting force acts directly on the ring forging. Increasing the exciting force can make the microstructure inside the forging generate stronger vibration and displacement, which helps to transfer the stress in the stress concentration area to the area with lower stress, thereby improving the stress distribution uniformity and enhancing the consistency of the overall performance of the forging. If the exciting frequency is changed, it may make the working state of the exciter unstable, and it may be necessary to re-debug the entire vibration system, increasing the factors of stress instability of the ring forging. Therefore, using the method of increasing the exciting force is relatively easier to implement and ensure the stability of the process.

[0138] In a specific embodiment, the calculation formula of the correction coefficient is as follows:

[0139] ,

[0140] The excitation force correction amount = initial excitation force × correction coefficient, the temperature correction amount = quenching liquid temperature × correction coefficient, and the time correction amount = post-heat-treatment annealing time × correction coefficient. The value of the preset stress threshold is 5% - 10% of the preset residual stress. Preferably, the value of the preset stress threshold is 8% of the preset residual stress. The value range and the preferred value of the preset stress threshold can be determined according to the actual situation and will not be elaborated here.

[0141] The present invention makes a hierarchical judgment based on the stress distribution state and the average value of the stress difference, and specifically selects correction parameters: when the stress distribution is uneven but the difference is small, the vibration aging parameters are preferentially adjusted, which can quickly improve the stress distribution through refined vibration control without changing the overall heat treatment system; while when the stress difference is large, the correction direction is turned to the quenching liquid temperature or the post-heat-treatment annealing time, and the key parameters in the heat treatment process are adjusted from the root to ensure that the stress can be more thoroughly eliminated. It avoids the waste of resources caused by blindly adjusting parameters, effectively eliminates the residual stress of the ring forgings, reduces the deformation rate, and further meets the strict requirements for high precision of components in the manufacturing of high-end equipment such as wind power.

[0142] Example 1 Vibration stress relief and stress detection after ring rolling

[0143] Test pieces 1# and 2# with the specification of φ4700 / φ4585*100 are selected as the test pieces for vibration stress relief. The maximum outer diameter of the two pieces is 4724 mm, the minimum is 4722 mm, and the height is 122 mm. Among them, test piece 2# is subjected to vibration aging treatment and residual stress detection after ring rolling, and test piece 1# is used as a control piece. Figure 5 It is a schematic diagram of the stress detection positions of test piece 2# in Example 1; when testing the stress, the point with the largest diameter is used as the upper end face 0° position. Points A, B, and C are located on the upper end face, and points a, b, and c are located on the inner side face. A is the upper end face 0° position, a is the inner side face 0° position, and the angle between the corresponding two points on the upper end face and the inner side face is 120°.

[0144] According to Figure 5 Stress gauges are arranged according to the detection positions to test the residual stress of the ring forgings at the corresponding detection positions. The test results are shown in Tables 2 and 3. Table 2 is the stress distribution parameters of the upper end face of test piece 2# before and after vibration, and Table 3 is the stress distribution parameters of the inner side face of test piece 2# before and after vibration.

[0145] Table 2 Stress distribution parameters of the upper end face of test piece 2# before and after vibration

[0146]

[0147] Table 3 Stress distribution parameters of the upper end face of Test Piece 2# before and after vibration

[0148]

[0149] As can be seen from Table 2 and Table 3, after the vibration aging treatment of the ring forging, the residual stress of the steel ring forging is reduced by 55% - 65%. For Test Piece 1#, stress detection and vibration stress relief are not carried out, and its internal residual stress distribution is the same as that of Test Piece 2# before vibration.

[0150] Example 2 Vibration stress relief and stress detection after quenching and tempering

[0151] Put the vibration stress-relieved Test Piece 2# and the control Test Piece 1# that has not undergone vibration stress relief into the furnace, hold at 860°C for 5 hours, cool with a quenching liquid, take out the liquid and air-cool when the liquid cools to 90°C, and detect the hardness in the quenched state. Then, temper at 580°C for 8 hours, air-cool to room temperature after the holding is completed, and detect the hardness and elliptical deformation of the steel ring forging after tempering.

[0152] When loading into the furnace, place the vibration stress-relieved Test Piece 2# at the bottom. After tempering, use a portable Leeb hardness tester on-site for heat treatment to detect the hardness at 3 points of the ring forging. The hardness of Test Piece 1# (control piece) is 306HBW, 292HBW, and 293HBW, and the hardness of Test Piece 2# (test piece) is 300HBW, 304HBW, and 288HBW. After quenching and tempering, the maximum outer diameter of the control piece is 4752mm, the minimum outer diameter is 4730mm, and the difference between the maximum and minimum outer diameters is 22mm. After quenching and tempering, the maximum outer diameter of the test piece is 4754mm, the minimum outer diameter is 4731mm, and the difference between the maximum and minimum outer diameters is 23mm. It can be concluded that before the quenching and tempering treatment, there is no obvious difference in the deformation of the steel ring forging after vibration aging treatment and the steel ring forging without vibration aging treatment during the heat treatment process, and it can be considered that the vibration effect on the large-diameter thin-walled ring forging before the quenching and tempering treatment has basically no influence on the subsequent quenching and tempering treatment.

[0153] According to Figure 5 Detect the residual stress of the control piece and the test piece after quenching and tempering at the stress detection positions shown. Among them, the detection positions of the test piece are the same as those before quenching and tempering stress detection, and the strain gauges of the control piece are arranged at similar positions when loading for tempering to reduce the influence of furnace temperature non-uniformity on the internal residual stress distribution of the ring forging. After stress detection, mechanical vibration stress relief is carried out on the test piece, and the control piece is still used as a control piece without vibration treatment. The results are shown in Table 4 and Table 5.

[0154] Table 4 Stress distribution parameters of the upper end face of Test Piece 2# before and after vibration after quenching and tempering

[0155]

[0156] Table 5 Stress distribution parameters on the inner side of Test Piece 2# before and after vibration after quenching and tempering

[0157]

[0158] Table 6 Residual stress distribution parameters of Test Piece 1# after quenching and tempering

[0159]

[0160] Sum the residual stresses at each detection position before and after each treatment of the test pieces in Examples 1 and 2 and take the average value to obtain Figure 6 , Figure 6 is the stress distribution broken line graph of Test Piece 2# under various treatment conditions in Examples 1 to 2. (The residual stress before quenching and tempering is negative, that is, it shows compressive stress, and only the absolute value is taken here).

[0161] From Figure 6 it can be concluded that before quenching and tempering, due to the large residual stress of Test Piece 2#, the effect of vibration stress relief is very obvious. And after each vibration of Test Piece 2#, the reduction effect of residual stress reaches more than 50%. Compared with Test Piece 2#, Test Piece 1# has not undergone vibration stress relief before and after quenching and tempering. Under the same process conditions, the residual stress in Control Piece 1# is significantly higher than that in Test Piece 2#.

[0162] The relevant results of the above Examples 1 to 2 show that

[0163] (1) After each vibration of Test Piece 2#, the stress relief effect is more than 55%. After two vibrations before and after quenching and tempering, the internal residual stress of Test Piece 2# is only 1 / 8 of the original, and the reduction effect of residual stress is significant.

[0164] (2) Compared with Test Piece 2#, Test Piece 1# has not undergone vibration stress relief before and after quenching and tempering. Under the same process, the residual stress of Test Piece 1# is much higher than that of Test Piece 2#.

[0165] (3) After vibration stress relief, the residual stress levels in each direction of Test Piece 2# are closer, and the stress distribution is more uniform. The number of vibrations of Test Piece 1# is less, and the residual stress levels at each part inside the forging fluctuate greatly, and the uniformity is not as good as that of Test Piece 2#.

[0166] Generally speaking, for wind power ring forgings, the combined scheme of the preferred heat treatment process and vibration aging combines the economy of the production process and the high efficiency of actual deformation control. Compared with the case without measures, the total number of deformations is reduced by 50%, the stress elimination rate reaches 55% - 70%, and the deformation amount is reduced from the original 8 mm to 3.2 mm.

[0167] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A comprehensive optimization method for heat treatment and vibration aging of a wind power ring forging, characterized in that, Including: Obtaining a ring forging after final forging; Monitoring the surface temperature of the ring forging after final forging, and after the surface temperature drops below the target surface temperature, loading it into the furnace for post-heat annealing, and determining the rolling residual stress of the ring forging based on a number of detection points; Heating the annealed ring forging to the target heating temperature, holding the temperature and then transferring it to a quenching tank. During the transfer process, determine the target transfer time of the ring forging according to the wall thickness of the forging, the real-time forging temperature, and the ambient wind speed, and determine the optimal transfer time of the ring forging according to the wall thickness of the forging and the target transfer time; Performing tempering treatment on the ring forging after quenching, determining the tempering residual stress of the ring forging at each of the detection points after tempering, and determining the optimal vibration aging parameters according to the tempering residual stress to perform vibration aging treatment on the ring forging; After the vibration aging treatment, detecting the vibration residual stress at each of the detection points, and determining to adjust the vibration aging parameters or adjust the heat treatment parameters according to the vibration residual stress and the preset residual stress; Wherein, the vibration aging parameters include exciting force and exciting frequency.

2. The comprehensive optimization method for heat treatment and vibration aging of wind power ring forgings according to claim 1, characterized in that, Determining the optimal transfer time of the ring forging includes: After annealing, determining the real-time forging temperature, ambient temperature, and ambient wind speed corresponding to a number of detection points on the ring forging at a number of detection time points; Constructing a heat balance equation according to the real-time forging temperature, the ambient wind speed, and the wall thickness of the forging; Determining the target transfer time of the ring forging according to the forging inlet temperature and the heat balance equation; Determining the optimal transfer time according to the wall thickness of the forging and the target transfer time.

3. The comprehensive optimization method for heat treatment and vibration aging of the wind power ring forging according to claim 2, characterized in that Determining the target transfer time of the ring forging includes: Determining the convective heat transfer coefficient according to the ambient wind speed, the wall thickness of the forging, and the air thermal conductivity; Establishing a heat balance equation according to the forging weight, the convective heat transfer coefficient, the ambient temperature, and the real-time forging temperature, and determining the target transfer time of the ring forging through the heat balance equation and the forging inlet temperature.

4. The comprehensive optimization method for heat treatment and vibration aging of the wind power ring forging according to claim 3, characterized in that, Determining the optimal transfer time according to the wall thickness of the forging and the target transfer time includes: Determining the target wall thickness range corresponding to the ring forging based on the preset wall thickness division rule and the wall thickness of the forging; Determining the empirical transfer time of the ring forging according to the target wall thickness range; Combining the target transfer time and the empirical transfer time to determine the optimal transfer time; Wherein, the wall thickness of the forging is positively correlated with the empirical transfer time.

5. The comprehensive optimization method for heat treatment and vibration aging of the wind power ring forging according to claim 4, characterized in that, Determining the empirical transfer time of the ring forging according to the determination result of whether the target wall thickness range corresponding to the wall thickness of the forging belongs to the minimum wall thickness range includes: If the target wall thickness range belongs to the minimum wall thickness range, determining that the empirical transfer time of the ring forging is the preset transfer time; If the target wall thickness range does not belong to the minimum wall thickness range, determining that the empirical transfer time of the ring forging increases according to the preset time increment rule based on the preset transfer time.

6. The comprehensive optimization method for heat treatment and vibration aging of the wind power ring forging according to claim 1, characterized in that, Determining the optimal vibration aging parameters includes: Constructing a stress model according to a number of preset vibration aging parameter combinations and the tempering residual stress to determine the simulated residual stress of the ring forging under vibration aging treatment; Determine the optimal vibration aging parameters based on the simulated residual stress and the preset residual stress; Among them, the preset vibration aging parameter combination includes a preset exciting force and a preset exciting frequency.

7. The comprehensive optimization method for heat treatment and vibration aging of the wind power ring forgings according to claim 6, characterized in that, Determining the optimal vibration aging parameters further includes: Determine the simulated stress difference based on the simulated residual stress and the preset residual stress; Arrange the simulated stress differences corresponding to each preset vibration aging parameter combination in order, and select the combination of the preset vibration aging parameters with the smallest simulated stress difference as the optimal vibration aging parameters.

8. The comprehensive optimization method for heat treatment and vibration aging of the wind power ring forging according to claim 1, characterized in that Determine the adjustment of the vibration aging parameters, including: Determine the stress distribution state of the ring forging according to the vibration residual stress at several detection points, including uniform distribution and non-uniform distribution; Determine the adjustment of the vibration aging parameters according to the stress distribution state and the stress difference between the vibration residual stress and the preset residual stress, and determine the correction amount of the vibration aging parameters; Among them, if the stress distribution state is non-uniform and the average value of the stress difference is less than or equal to the preset stress threshold, it is determined that the vibration aging parameters are adjusted.

9. The comprehensive optimization method for heat treatment and vibration aging of wind power ring forgings according to claim 8, characterized in that, Determine the adjustment of the heat treatment parameters, including: If the stress distribution state is non-uniform and the average value of the stress difference is greater than the preset stress threshold, it is determined that the heat treatment parameters are adjusted, and the quenching liquid temperature or the post-heat treatment annealing time is adjusted.

10. The comprehensive optimization method for heat treatment and vibration aging of the wind power ring forging according to claim 9, characterized in that, It also includes: After determining the adjustment of the vibration aging parameters or the heat treatment parameters, determine the correction amount of the corresponding parameters according to the correction parameter, the average value of the stress difference, and the preset stress threshold. Among them, If the correction parameter is the vibration aging parameter, it is determined to increase the exciting force, determine the correction coefficient according to the average value of the stress difference and the preset stress threshold, and determine the correction amount of the exciting force according to the correction coefficient and the exciting force; If the correction parameter is the quenching liquid temperature or the post-heat treatment annealing time, increase the quenching liquid temperature or extend the post-heat treatment annealing time, and determine the temperature correction amount or the time correction amount according to the correction coefficient.

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