CN116818555B - Method for determining pre-rotation speed of nickel-based superalloy wheel disc blank - Google Patents
Method for determining pre-rotation speed of nickel-based superalloy wheel disc blank Download PDFInfo
- Publication number
- CN116818555B CN116818555B CN202310774245.9A CN202310774245A CN116818555B CN 116818555 B CN116818555 B CN 116818555B CN 202310774245 A CN202310774245 A CN 202310774245A CN 116818555 B CN116818555 B CN 116818555B
- Authority
- CN
- China
- Prior art keywords
- wheel disc
- nickel
- disc blank
- plastic strain
- superalloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 229910000601 superalloy Inorganic materials 0.000 title claims abstract description 155
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 69
- 239000012496 blank sample Substances 0.000 claims abstract description 49
- 238000012360 testing method Methods 0.000 claims abstract description 32
- 230000035882 stress Effects 0.000 claims description 44
- 230000008569 process Effects 0.000 claims description 29
- 238000009826 distribution Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000011056 performance test Methods 0.000 claims description 8
- 238000004088 simulation Methods 0.000 claims description 8
- 230000032683 aging Effects 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000005242 forging Methods 0.000 description 16
- 230000001276 controlling effect Effects 0.000 description 7
- 239000000523 sample Substances 0.000 description 7
- 239000000956 alloy Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- PXFBZOLANLWPMH-UHFFFAOYSA-N 16-Epiaffinine Natural products C1C(C2=CC=CC=C2N2)=C2C(=O)CC2C(=CC)CN(C)C1C2CO PXFBZOLANLWPMH-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/28—Investigating ductility, e.g. suitability of sheet metal for deep-drawing or spinning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a method for determining the pre-rotation speed of a nickel-based superalloy wheel disc blank, which comprises the following steps: testing creep properties of a nickel-based superalloy wheel disc blank sample under different prestretching plastic strain amounts, and determining critical prestretching plastic strain amounts of which the creep properties meet acceptance criteria; simulating and calculating equivalent plastic strain of the nickel-base superalloy wheel disc blank at different pre-rotation speeds, and determining the maximum allowable equivalent plastic strain of the nickel-base superalloy wheel disc blank; when the maximum equivalent plastic strain of the nickel-base superalloy wheel disc blank is the same as the critical pre-stretching plastic strain amount of the nickel-base superalloy wheel disc blank sample, determining the rotating speed as the pre-rotating speed. The method can quickly determine the pre-rotation rotating speed of the wheel disc blank, reduces residual stress to the greatest extent on the premise of ensuring that the creep performance of the wheel disc blank after pre-rotation meets the acceptance criterion, and solves the problems of long trial-and-error test period, high cost, unqualified creep performance of the wheel disc blank after pre-rotation and the like.
Description
Technical Field
The invention belongs to the technical field of high-temperature alloy materials, and particularly relates to a method for determining the pre-rotation speed of a nickel-based high-temperature alloy wheel disc blank.
Background
The nickel-based superalloy material has excellent comprehensive mechanical properties, and is mainly used for manufacturing gas compressor and turbine parts of aeroengines and gas turbines. After forging, nickel-base superalloy discs typically require solution treatment at temperatures exceeding or approaching the total dissolution temperature of the strengthening phase, followed by rapid cooling at a higher cooling rate to ensure that the strengthening phase does not coarsen, thereby achieving a sufficient level of strengthening. However, in the quenching process, the difference of cooling speeds in different areas inside the wheel disc forging is large, and uneven shrinkage deformation is caused by the temperature difference, so that residual stress with large gradient is formed inside the wheel disc blank. Because the stacking fault energy of the nickel-based superalloy is relatively low, residual stress is difficult to be completely released in the subsequent stress relief annealing process, and a large part of residual stress still remains in the interior of the nickel-based superalloy wheel disc blank. The high-magnitude residual stress in the nickel-based superalloy wheel disc blank is easy to cause the problems of machining deformation of parts, poor stability of the service size of the parts installation and the like.
At present, the residual stress in the nickel-based superalloy wheel disc blank is released through pre-rotation in engineering, and in the pre-rotation process, the wheel disc blank is locally yielding and generates plastic deformation under the action of centrifugal force, and the residual stress in the wheel disc blank is released and redistributed. The rotational speed is a core technological parameter of pre-rotation, the larger the rotational speed is, the larger the plastic deformation of the wheel disc blank is, the larger the release degree of the residual stress in the wheel disc blank is, however, the excessive plastic deformation can damage the microstructure of the wheel disc blank, so that the mechanical property of the wheel disc blank is reduced, and particularly the creep property is seriously attenuated; when the rotation speed is too small, plastic deformation of the wheel disc blank cannot be caused, and residual stress in the wheel disc blank cannot be fully released. Therefore, the rotating speed of the nickel-based superalloy wheel disc blank for pre-rotation must be reasonably determined, so that the purposes of not damaging the creep property of the wheel disc blank and fully releasing the residual stress in the wheel disc blank are achieved.
In actual engineering, a reasonable pre-rotation rotating speed is determined by performing multiple rounds of experiments and verification, so that the mechanical property of the wheel disc blank is ensured to reduce the internal residual stress to the greatest extent on the premise of meeting the relevant acceptance standard after the wheel disc blank is pre-rotated, and the test period is long and the cost is high. The existing literature data mainly concentrate on researches on a method and a device for rotating, regulating and controlling residual stress, a method for controlling residual deformation in the rotating process and the like, and no research and record is made on how to determine the pre-rotating speed of a nickel-based superalloy wheel disc blank.
The invention patent with application publication number of CN111471944A discloses a method for regulating and controlling the residual stress of a high-temperature alloy blank disc forging through pre-rotation, which comprises the following steps: determining a target revolution for regulating and controlling the residual stress of the blank disc forging, and determining a target deformation amount of plastic deformation required to be generated by regulating and controlling the residual stress through pre-rotating the blank disc forging; and pre-rotating the blank disc forging with the target revolution, monitoring the deformation of the blank disc forging, and stopping pre-rotating when the deformation of the blank disc forging reaches the target deformation. According to the technical scheme, the residual stress of the high-temperature alloy blank disc forging is mainly emphasized and controlled through the pre-rotation, the residual stress of the blank disc forging can be reduced by adopting the technical scheme, but the creep performance of the blank disc forging is greatly affected by the pre-rotation, and the creep performance damage factor is not considered by adopting the technical scheme. It is known that the core process parameter of pre-rotation is the rotational speed, and only reasonable control of the rotational speed can reduce the residual stress of the blank disc forging without damaging the creep performance.
The invention patent application publication number CN114531884a discloses a method for stress relief by rotation, which has a step of increasing the rotation speed, which comprises: a first substep of measuring, at a first given moment, a value representative of the rotation speed and a value representative of the radial expansion; a second substep of measuring a value representative of the rotational speed at a second given instant, subsequent to the first given instant, and representative of the radial expansion; a third sub-step comprising determining leader coefficients of the first affine function from previous values; a fourth substep comprising determining, in the form of a second affine function, a target radial expansion value from the value representing the rotational speed, the origin of which is the value of the desired final residual expansion, and the characteristic coefficient of which is the characteristic coefficient of the first affine function; the fifth sub-step of increasing the rotational speed of the component is stopped when the actual expansion of the rotating component corresponds to the target relative radial expansion value determined in the previous sub-step. According to the technical scheme, residual stress of the forging is mainly eliminated through rotation (namely pre-rotation), and although the rotating speed is emphasized in the pre-rotation process, a specific method for determining the pre-rotation rotating speed is not provided, and factors which damage the creep performance of the forging due to the pre-rotation are not considered.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for determining the pre-rotation speed of a nickel-based superalloy wheel disc blank, which comprises the following steps in sequence:
step one: testing creep properties of a nickel-based superalloy wheel disc blank sample under different prestretching plastic strain amounts, and determining critical prestretching plastic strain amounts of which the creep properties meet acceptance criteria;
step two: simulating and calculating equivalent plastic strain of the nickel-base superalloy wheel disc blank at different pre-rotation speeds, and determining the maximum allowable equivalent plastic strain of the nickel-base superalloy wheel disc blank;
step three: and when the maximum equivalent plastic strain of the nickel-base superalloy wheel disc blank is the same as the critical pre-stretching plastic strain amount of the nickel-base superalloy wheel disc blank sample, determining the corresponding pre-rotation speed in the simulation process as the pre-rotation speed of the nickel-base superalloy wheel disc blank in the actual pre-rotation process.
Preferably, in the first step, the method for determining the critical pre-stretching plastic strain amount with creep property meeting the acceptance criterion comprises the following steps in sequence:
step (1): blanking from a nickel-based superalloy wheel disc blank, and preparing a nickel-based superalloy wheel disc blank sample for testing creep property;
step (2): prestretching the nickel-base superalloy wheel disc blank samples with different plastic strain amounts, measuring and controlling the strain in the whole prestretching process by using a extensometer, and recording the plastic strain of the nickel-base superalloy wheel disc blank samples after prestretching unloading;
step (3): carrying out creep performance test on the pre-stretched nickel-base superalloy wheel disc blank sample, and recording creep strain of the nickel-base superalloy wheel disc blank sample for a certain time;
step (4): and determining the critical pre-stretching plastic strain quantity of the nickel-base superalloy wheel disc blank sample according to the acceptance standard of the creep property of the nickel-base superalloy wheel disc blank and the creep property obtained by pre-stretching of the nickel-base superalloy wheel disc blank sample with different plastic strain quantities.
The nickel-based superalloy wheel disc blank refers to a product of a wheel disc forging after heat treatment (solution treatment and aging treatment) and before part processing, namely, the product (wheel disc blank) at the stage is pre-rotated.
According to the invention, the nickel-based superalloy wheel disc blank sample for testing the creep performance is processed by blanking from the nickel-based superalloy wheel disc blank, so that the creep performance of the creep sample is guaranteed to be representative and completely consistent with the wheel disc blank. Acceptance criteria for creep performance of a nickel-based superalloy wheel disc blank are determined according to the use requirements of engineering on the alloy.
In any of the above embodiments, it is preferable that in the step (1), at least one nickel-base superalloy wheel disc blank test sample for testing creep performance is prepared under the same amount of pre-stretching plastic strain. If the influence of the dispersibility of creep test data is considered, several samples, such as three samples, five samples and the like, can be manufactured for the same prestretching plastic strain, each sample is subjected to a creep performance test, the creep strain of each sample under a certain time is recorded, then an average value is taken, and the average value is taken as the creep strain of the nickel-based superalloy wheel disc blank under the prestretching plastic strain.
In any of the above embodiments, it is preferable that in the step (2), the nickel-base superalloy wheel disc blank test pieces are pre-stretched with different plastic strain amounts in a room temperature environment.
In any of the above embodiments, it is preferable that in step (2), the whole pretensioning process includes three stages of pretensioning loading, holding for a certain time at maximum pretensioning load, and pretensioning unloading. The time kept at maximum pretension load should be the same as the time kept at maximum pre-rotation speed.
In any of the above schemes, preferably, in the step (4), the critical pre-stretching plastic strain amount of the nickel-base superalloy wheel disc blank sample is determined according to the acceptance criterion of the creep property of the nickel-base superalloy wheel disc blank, and when the creep strain under a certain pre-stretching plastic strain amount obtained by testing reaches the upper limit required by the acceptance criterion, the pre-stretching plastic strain amount is the critical pre-stretching plastic strain amount of the nickel-base superalloy wheel disc blank sample.
In any of the above schemes, preferably, in the second step, the method for determining the maximum allowable equivalent plastic strain of the nickel-based superalloy wheel disc blank comprises the following steps in sequence:
step A: simulating and calculating internal residual stress distribution conditions of the nickel-based superalloy wheel disc blank after heat treatment, correcting simulation results by combining actually measured internal residual stress values of the nickel-based superalloy wheel disc blank, and taking the corrected values as initial residual stress of the nickel-based superalloy wheel disc blank before pre-rotation;
and (B) step (B): simulating and calculating the maximum equivalent plastic strain of the nickel-based superalloy wheel disc blank at different pre-rotation speeds;
step C: determining the corresponding relation between the pre-rotation rotating speed and the maximum equivalent plastic strain of the nickel-based superalloy wheel disc blank;
step D: and determining the maximum equivalent plastic strain allowed by the nickel-based superalloy wheel disc blank.
In any of the above schemes, preferably, in the step a, the process of simulating and calculating the heat treatment of the nickel-base superalloy wheel disc blank comprises two stages of solution treatment and aging treatment. And (3) simulating and calculating the internal residual stress distribution of the nickel-based superalloy wheel disc blank after heat treatment, namely simulating and calculating the internal residual stress distribution of the nickel-based superalloy wheel disc blank before pre-rotation. In the invention, the simulation software used can be finite element analysis software such as Abaqus, ansys and the like.
In any of the above schemes, preferably, in the step B, the process of simulating and calculating the maximum equivalent plastic strain of the nickel-base superalloy wheel disc blank at different pre-rotation speeds includes three stages of rising the pre-rotation speed to the maximum, keeping for a certain time at the maximum pre-rotation speed, and reducing the pre-rotation speed to zero. The time kept at the maximum pre-rotation speed should be the same as the time kept at the maximum pre-tension load.
In the invention, when the corresponding relation between the pre-rotation rotating speed and the maximum equivalent plastic strain of the nickel-based superalloy wheel disc blank is determined, the plastic strain value takes the equivalent plastic strain under the maximum pre-rotation rotating speed. In the pre-rotation process, the pre-rotation speed is continuously increased, and when the maximum equivalent plastic strain value of the nickel-based superalloy wheel disc blank is the same as the critical pre-stretching plastic strain value of the nickel-based superalloy wheel disc blank sample under a certain pre-rotation speed, the speed is determined to be the pre-rotation speed.
The method for determining the pre-rotation speed of the nickel-based superalloy wheel disc blank has the following beneficial effects:
(1) The method can quickly determine the pre-rotation rotating speed of the wheel disc blank, reduces the residual stress of the wheel disc blank to the greatest extent on the premise of ensuring that the creep performance of the wheel disc blank after the pre-rotation meets the relevant acceptance standard, and solves the problems of long period for determining the pre-rotation rotating speed (the pre-rotation rotating speed is determined by a plurality of tests in the prior art), high cost, unqualified creep performance of the wheel disc blank after the pre-rotation and the like in the prior art. According to the method, the critical pre-stretching plastic strain quantity is determined through the creep performance test of the sample level, the critical pre-stretching plastic strain quantity is used as a target limiting value, and the pre-rotation rotating speed is determined through the pre-rotation simulation of the wheel disc blank.
(2) According to the method, the influence factors of plastic deformation on the creep performance of the wheel disc blank in the pre-rotation process are considered, the creep performance of the wheel disc blank after the pre-rotation can be ensured to meet the relevant acceptance criterion through the pre-rotation rotating speed determined by the method, and the aims of reducing the residual stress in the wheel disc blank and not damaging the creep performance of the wheel disc blank are achieved.
(3) The invention has universality, can be used for the pre-rotation of wheel disc blanks of aeroengines such as turbine discs, compressor discs and the like with different materials and different shapes, and can overcome the problems of long test period, high test cost and the like caused by trial-and-error tests.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of a method for determining the pre-rotation speed of a nickel-base superalloy wheel disc blank in accordance with the present invention;
FIG. 2 is a graph showing the creep deformation curve of a nickel-base superalloy wheel disc blank sample pre-stretched with different amounts of plastic strain in the embodiment shown in FIG. 1;
FIG. 3 is a graph of 68h creep strain of a nickel-base superalloy wheel disc blank sample pre-stretched to different plastic strain amounts in the embodiment of FIG. 1;
FIG. 4 is an internal initial circumferential residual stress distribution of the nickel-base superalloy wheel disc blank prior to pre-rotation in the embodiment of FIG. 1;
FIG. 5 is a graph of the maximum equivalent plastic strain of a nickel-base superalloy wheel disc blank at different pre-rotation speeds for the embodiment shown in FIG. 1;
FIG. 6 is an equivalent plastic strain distribution of a nickel-base superalloy wheel disc blank at a target pre-rotation speed in the embodiment of FIG. 1.
The reference numerals in the drawings indicate: 1-0.30% plastic strain pre-stretch curve, 2-0.45% plastic strain pre-stretch curve, 3-0.60% plastic strain pre-stretch curve, 4-0.75% plastic strain pre-stretch curve, 5-1.00% plastic strain pre-stretch curve, 6-1.50% plastic strain pre-stretch curve.
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the following examples.
As shown in fig. 1, a preferred embodiment of the method for determining the pre-rotation speed of a nickel-base superalloy wheel disc blank according to the present invention comprises the following steps in order:
step one: testing creep properties of a nickel-based superalloy wheel disc blank sample under different prestretching plastic strain amounts, and determining critical prestretching plastic strain amounts of which the creep properties meet acceptance criteria;
step two: simulating and calculating equivalent plastic strain of the nickel-base superalloy wheel disc blank at different pre-rotation speeds, and determining the maximum allowable equivalent plastic strain of the nickel-base superalloy wheel disc blank;
step three: and when the maximum equivalent plastic strain of the nickel-base superalloy wheel disc blank is the same as the critical pre-stretching plastic strain amount of the nickel-base superalloy wheel disc blank sample, determining the corresponding pre-rotation speed in the simulation process as the pre-rotation speed of the nickel-base superalloy wheel disc blank in the actual pre-rotation process.
In this embodiment, the nickel-based superalloy wheel disc blank refers to a product of the wheel disc forging after heat treatment (solution treatment+aging treatment) and before part processing, that is, a product (wheel disc blank) at this stage is pre-rotated. The brand of the nickel-based superalloy is FGH96, the outer diameter of a wheel disc blank is 600mm, the inner diameter of the wheel disc blank is 50mm, the height of the wheel disc blank is 160mm, the temperature of creep performance test is 700 ℃, the stress is 690MPa, and the creep strain of 68h of creep performance acceptance standard is not more than 0.2%.
In the first step, the method for determining the critical pre-stretching plastic strain quantity with creep property meeting the acceptance standard comprises the following steps in sequence:
step (1): blanking from a nickel-based superalloy wheel disc blank, and preparing a nickel-based superalloy wheel disc blank sample for testing creep property;
step (2): prestretching the nickel-base superalloy wheel disc blank samples with different plastic strain amounts, measuring and controlling the strain in the whole prestretching process by using a extensometer, and recording the plastic strain of the nickel-base superalloy wheel disc blank samples after prestretching unloading;
step (3): carrying out creep performance test on the pre-stretched nickel-base superalloy wheel disc blank sample, and recording creep strain of the nickel-base superalloy wheel disc blank sample for a certain time;
step (4): and determining the critical pre-stretching plastic strain quantity of the nickel-base superalloy wheel disc blank sample according to the acceptance standard of the creep property of the nickel-base superalloy wheel disc blank and the creep property obtained by pre-stretching of the nickel-base superalloy wheel disc blank sample with different plastic strain quantities.
In the step (1), a nickel-based superalloy wheel disc blank sample for testing creep performance is processed by blanking from the nickel-based superalloy wheel disc blank so as to ensure that the creep performance of the creep sample is representative and completely consistent with the wheel disc blank. Six pre-stretching plastic strain amounts are selected, namely 0.30%, 0.45%, 0.60%, 0.75%, 1.00% and 1.50%, and a nickel-base superalloy wheel disc blank sample for testing creep performance is prepared under the same pre-stretching plastic strain amount.
In the step (2), pre-stretching of different plastic strain amounts is carried out on the nickel-based superalloy wheel disc blank sample in a room temperature environment. The whole prestretching process comprises three stages of prestretching loading, holding for a certain time at maximum prestretching load, and prestretching unloading, wherein the holding time at maximum prestretching load should be the same as the holding time at maximum prestretching rotational speed, in this embodiment 30s.
In the step (3), after six nickel-base superalloy wheel disc blank samples are prestretched by plastic strains of 0.30%, 0.45%, 0.60%, 0.75%, 1.00% and 1.50%, creep performance tests are respectively carried out. The creep deformation curves of the nickel-based superalloy wheel disc blank test samples after being prestretched by different plastic strain amounts are shown in fig. 2, wherein six creep deformation curves in the graph are respectively 0.30% plastic strain prestretching curve 1, 0.45% plastic strain prestretching curve 2, 0.60% plastic strain prestretching curve 3, 0.75% plastic strain prestretching curve 4, 1.00% plastic strain prestretching curve 5 and 1.50% plastic strain prestretching curve 6, and the measured temperature is 700 ℃ and the 68h creep strain amount under the stress of 690MPa is respectively 0.09%, 0.13%, 0.17%, 0.19%, 0.24% and 0.34%.
In the step (4), the critical pre-stretching plastic strain amount of the nickel-base superalloy wheel disc blank sample is determined according to the acceptance criterion of the creep property of the nickel-base superalloy wheel disc blank, and when the creep strain of a certain pre-stretching plastic strain amount obtained by testing reaches the upper limit required by the acceptance criterion, the critical pre-stretching plastic strain amount of the nickel-base superalloy wheel disc blank sample is the critical pre-stretching plastic strain amount. In this example, the creep strain of 68h is not more than 0.2%. As shown in fig. 3, according to the actual measurement result of the creep strain of the nickel-base superalloy wheel disc blank sample, the actual measurement value of the 68h creep strain at 0.75% pre-stretching plastic strain is 0.19%, which is close to the upper limit value of the creep performance acceptance criterion, and thus the critical pre-stretching plastic strain amount of the nickel-base superalloy wheel disc blank sample is determined as the 0.75% pre-stretching plastic strain amount.
In the second step, the method for determining the maximum equivalent plastic strain allowed by the nickel-based superalloy wheel disc blank comprises the following steps in sequence:
step A: the internal residual stress distribution condition of the nickel-based superalloy wheel disc blank after heat treatment is simulated and calculated, the simulation result is corrected by combining the numerical value of the internal residual stress of the nickel-based superalloy wheel disc blank actually measured by a contour method, and the corrected value is used as the initial residual stress of the nickel-based superalloy wheel disc blank before pre-rotation;
and (B) step (B): simulating and calculating the maximum equivalent plastic strain of the nickel-based superalloy wheel disc blank at different pre-rotation speeds;
step C: determining the corresponding relation between the pre-rotation rotating speed and the maximum equivalent plastic strain of the nickel-based superalloy wheel disc blank;
step D: and determining the maximum equivalent plastic strain allowed by the nickel-based superalloy wheel disc blank.
In the step A, the process of simulating and calculating the heat treatment of the nickel-based superalloy wheel disc blank comprises two stages of solution treatment and aging treatment. And simulating and calculating the internal residual stress distribution of the nickel-based superalloy wheel disc blank after heat treatment by using Abaqus or Ansys finite element analysis software, namely simulating and calculating the internal residual stress distribution of the nickel-based superalloy wheel disc blank before pre-rotation. In this embodiment, the maximum circumferential residual stress in the nickel-base superalloy wheel disc blank obtained by actual measurement by a contour method is 588MPa, and after correction, the initial circumferential residual stress distribution in the nickel-base superalloy wheel disc blank is shown in fig. 4.
In the step B, the process of simulating and calculating the maximum equivalent plastic strain of the nickel-based superalloy wheel disc blank at different pre-rotation speeds comprises three stages of rising the pre-rotation speed to the maximum, keeping for a certain time at the maximum pre-rotation speed and reducing the pre-rotation speed to zero, wherein the keeping time at the maximum pre-rotation speed is the same as the keeping time at the maximum pre-stretching load, and the embodiment is 30s. With the increase of the pre-rotation speed, the centrifugal force is continuously increased, the plastic deformation of the nickel-based superalloy wheel disc blank is continuously increased, and the internal residual stress is released and redistributed with the generation of the plastic deformation.
And C, continuously increasing the pre-rotation speed, and analyzing the maximum equivalent plastic strain of the nickel-based superalloy wheel disc blank in the pre-rotation process. The change of the maximum equivalent plastic strain of the nickel-based superalloy wheel disc blank along with the pre-rotation speed is shown in fig. 5, when the pre-rotation speed is increased to 17820r/min, the maximum equivalent plastic strain of the nickel-based superalloy wheel disc blank is 0.75%, at the moment, the equivalent plastic strain in the nickel-based superalloy wheel disc blank reaches the critical pre-stretching plastic strain amount of a nickel-based superalloy wheel disc blank sample, and the 17820r/min speed is determined as the pre-rotation speed. If the pre-rotation speed continues to increase, the internal residual stress of the nickel-based superalloy wheel disc blank may continue to decrease, but the generated plastic strain also increases, thereby causing the creep performance of the nickel-based superalloy wheel disc blank to be unqualified. The equivalent plastic strain distribution of the nickel-based superalloy wheel disc blank at 17820r/min pre-rotation speed is shown in FIG. 6.
In this embodiment, when determining the correspondence between the pre-rotation speed and the maximum equivalent plastic strain of the nickel-base superalloy wheel disc blank, the plastic strain value takes the equivalent plastic strain at the maximum pre-rotation speed. In the pre-rotation process, the pre-rotation speed is continuously increased, and when the maximum equivalent plastic strain value of the nickel-based superalloy wheel disc blank is the same as the critical pre-stretching plastic strain value of the nickel-based superalloy wheel disc blank sample under a certain pre-rotation speed, the speed is determined to be the pre-rotation speed.
The method for determining the pre-rotation speed of the nickel-based superalloy wheel disc blank has the following beneficial effects:
(1) The method can rapidly determine the pre-rotation rotating speed of the wheel disc blank, reduces the residual stress of the wheel disc blank to the greatest extent on the premise of ensuring that the creep performance of the wheel disc blank after pre-rotation meets the relevant acceptance standard, and solves the problems of long period of the pre-rotation rotating speed determination (the pre-rotation rotating speed is determined by a plurality of tests in the prior art), high cost, unqualified creep performance of the wheel disc blank after pre-rotation and the like in the prior art. The critical pre-stretching plastic strain quantity is determined through a creep performance test of a sample level, and is used as a target limiting value, and the pre-rotation rotating speed is determined through the pre-rotation simulation of the wheel disc blank.
(2) The method has the advantages that the influence factors of plastic deformation on the creep performance of the wheel disc blank in the pre-rotation process are considered, the creep performance of the wheel disc blank after the pre-rotation can be ensured to meet the relevant acceptance criterion through the pre-rotation rotating speed determined by the method, and the aims of reducing the residual stress in the wheel disc blank and not damaging the creep performance of the wheel disc blank are achieved.
(3) The universal rotary pre-rotation device has universality, can be used for pre-rotation of wheel disc blanks of aeroengines such as turbine discs, compressor discs and the like with different materials and different shapes, and can overcome the problems of long test period, high test cost and the like caused by trial-and-error tests.
The specific description is as follows: the technical scheme of the invention relates to a plurality of parameters, and the beneficial effects and remarkable progress of the invention can be obtained by comprehensively considering the synergistic effect among the parameters. In addition, the value ranges of all the parameters in the technical scheme are obtained through a large number of tests, and aiming at each parameter and the mutual combination of all the parameters, the inventor records a large number of test data, and the specific test data are not disclosed herein for a long period of time.
It will be appreciated by those skilled in the art that the method for determining the pre-rotation speed of a nickel-base superalloy wheel disc blank of the present invention includes any combination of the above-described summary of the invention and detailed description of the invention and the various parts shown in the drawings, and is limited in scope and does not describe each of these combinations in any way for brevity. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The method for determining the pre-rotation speed of the nickel-based superalloy wheel disc blank comprises the following steps in sequence:
step one: testing creep properties of a nickel-based superalloy wheel disc blank sample under different prestretching plastic strain amounts, and determining critical prestretching plastic strain amounts of which the creep properties meet acceptance criteria;
step two: simulating and calculating equivalent plastic strain of the nickel-base superalloy wheel disc blank at different pre-rotation speeds, and determining the maximum allowable equivalent plastic strain of the nickel-base superalloy wheel disc blank;
step three: when the maximum equivalent plastic strain of the nickel-base superalloy wheel disc blank is the same as the critical pre-stretching plastic strain amount of the nickel-base superalloy wheel disc blank sample, determining the corresponding pre-rotation speed in the simulation process as the pre-rotation speed of the nickel-base superalloy wheel disc blank in the actual pre-rotation process;
in the first step, the method for determining the critical pre-stretching plastic strain quantity with creep property meeting the acceptance standard comprises the following steps in sequence:
step (1): blanking from a nickel-based superalloy wheel disc blank, and preparing a nickel-based superalloy wheel disc blank sample for testing creep property;
step (2): prestretching the nickel-base superalloy wheel disc blank samples with different plastic strain amounts, measuring and controlling the strain in the whole prestretching process by using a extensometer, and recording the plastic strain of the nickel-base superalloy wheel disc blank samples after prestretching unloading;
step (3): carrying out creep performance test on the pre-stretched nickel-base superalloy wheel disc blank sample, and recording creep strain of the nickel-base superalloy wheel disc blank sample for a certain time;
step (4): determining critical pre-stretching plastic strain quantity of the nickel-base superalloy wheel disc blank sample according to acceptance criteria of the creep property of the nickel-base superalloy wheel disc blank and the creep property obtained by pre-stretching of the nickel-base superalloy wheel disc blank sample with different plastic strain quantities;
in the second step, the method for determining the maximum equivalent plastic strain allowed by the nickel-based superalloy wheel disc blank comprises the following steps in sequence:
step A: simulating and calculating internal residual stress distribution conditions of the nickel-based superalloy wheel disc blank after heat treatment, correcting simulation results by combining actually measured internal residual stress values of the nickel-based superalloy wheel disc blank, and taking the corrected values as initial residual stress of the nickel-based superalloy wheel disc blank before pre-rotation;
and (B) step (B): simulating and calculating the maximum equivalent plastic strain of the nickel-based superalloy wheel disc blank at different pre-rotation speeds;
step C: determining the corresponding relation between the pre-rotation rotating speed and the maximum equivalent plastic strain of the nickel-based superalloy wheel disc blank;
step D: and determining the maximum equivalent plastic strain allowed by the nickel-based superalloy wheel disc blank.
2. The method for determining the pre-rotation speed of a nickel-base superalloy wheel disc blank according to claim 1, wherein: in the step (1), at least one nickel-based superalloy wheel disc blank sample for testing creep performance is prepared under the same pre-stretching plastic strain quantity.
3. The method for determining the pre-rotation speed of the nickel-base superalloy wheel disc blank according to claim 2, wherein: in the step (2), pre-stretching of different plastic strain amounts is carried out on the nickel-based superalloy wheel disc blank sample in a room temperature environment.
4. A method for determining a pre-rotation speed of a nickel-base superalloy wheel disc blank according to claim 3, wherein: in step (2), the whole prestretching process comprises three stages of prestretching loading, maintaining for a certain time under the maximum prestretching load and prestretching unloading.
5. The method for determining the pre-rotation speed of the nickel-base superalloy wheel disc blank according to claim 4, wherein the method comprises the steps of: in the step (4), the critical pre-stretching plastic strain amount of the nickel-base superalloy wheel disc blank sample is determined according to the acceptance criterion of the creep property of the nickel-base superalloy wheel disc blank, and when the creep strain of a certain pre-stretching plastic strain amount obtained by testing reaches the upper limit required by the acceptance criterion, the critical pre-stretching plastic strain amount of the nickel-base superalloy wheel disc blank sample is the critical pre-stretching plastic strain amount.
6. The method for determining the pre-rotation speed of the nickel-base superalloy wheel disc blank according to claim 5, wherein the method comprises the steps of: in the step A, the process of simulating and calculating the heat treatment of the nickel-based superalloy wheel disc blank comprises two stages of solution treatment and aging treatment.
7. The method for determining the pre-rotation speed of the nickel-base superalloy wheel disc blank according to claim 6, wherein: in the step B, the process of simulating and calculating the maximum equivalent plastic strain of the nickel-based superalloy wheel disc blank at different pre-rotation speeds comprises three stages of rising the pre-rotation speed to the maximum, keeping for a certain time at the maximum pre-rotation speed and reducing the pre-rotation speed to zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310774245.9A CN116818555B (en) | 2023-07-25 | 2023-07-25 | Method for determining pre-rotation speed of nickel-based superalloy wheel disc blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310774245.9A CN116818555B (en) | 2023-07-25 | 2023-07-25 | Method for determining pre-rotation speed of nickel-based superalloy wheel disc blank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116818555A CN116818555A (en) | 2023-09-29 |
| CN116818555B true CN116818555B (en) | 2024-02-02 |
Family
ID=88121585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310774245.9A Active CN116818555B (en) | 2023-07-25 | 2023-07-25 | Method for determining pre-rotation speed of nickel-based superalloy wheel disc blank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116818555B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846174A (en) * | 2015-05-22 | 2015-08-19 | 南通中远船务工程有限公司 | Device and method for eliminating residual weld joint stress of cylindrical pile leg |
| CN109145335A (en) * | 2017-06-28 | 2019-01-04 | 中国航发贵阳发动机设计研究所 | A method of wheel disc low cycle fatigue life is improved by pre-rotation |
| CN111471944A (en) * | 2020-05-19 | 2020-07-31 | 北京钢研高纳科技股份有限公司 | Method for regulating and controlling residual stress of high-temperature alloy blank disc forging through prerotation |
| CN112016223A (en) * | 2020-07-20 | 2020-12-01 | 浙江海骆航空科技有限公司 | Test device and method for eliminating residual stress by pre-rotating turbine blank disc |
| CN112342368A (en) * | 2020-10-16 | 2021-02-09 | 中国航发北京航空材料研究院 | Process method for reducing residual stress of deformed high-temperature alloy disc by rotation method |
| CN114531884A (en) * | 2019-09-04 | 2022-05-24 | 赛峰航空器发动机 | Method for relieving stress by rotation |
| FR3125335A1 (en) * | 2021-07-19 | 2023-01-20 | Gaona Aero Material Co., Ltd. | Method of regulating residual stresses in blank disc forgings of superalloy by pre-rotation |
-
2023
- 2023-07-25 CN CN202310774245.9A patent/CN116818555B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846174A (en) * | 2015-05-22 | 2015-08-19 | 南通中远船务工程有限公司 | Device and method for eliminating residual weld joint stress of cylindrical pile leg |
| CN109145335A (en) * | 2017-06-28 | 2019-01-04 | 中国航发贵阳发动机设计研究所 | A method of wheel disc low cycle fatigue life is improved by pre-rotation |
| CN114531884A (en) * | 2019-09-04 | 2022-05-24 | 赛峰航空器发动机 | Method for relieving stress by rotation |
| CN111471944A (en) * | 2020-05-19 | 2020-07-31 | 北京钢研高纳科技股份有限公司 | Method for regulating and controlling residual stress of high-temperature alloy blank disc forging through prerotation |
| CN112016223A (en) * | 2020-07-20 | 2020-12-01 | 浙江海骆航空科技有限公司 | Test device and method for eliminating residual stress by pre-rotating turbine blank disc |
| CN112342368A (en) * | 2020-10-16 | 2021-02-09 | 中国航发北京航空材料研究院 | Process method for reducing residual stress of deformed high-temperature alloy disc by rotation method |
| FR3125335A1 (en) * | 2021-07-19 | 2023-01-20 | Gaona Aero Material Co., Ltd. | Method of regulating residual stresses in blank disc forgings of superalloy by pre-rotation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116818555A (en) | 2023-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2769339C1 (en) | Method for regulating internal stresses in heat-resistant alloy disc forgings by means of pre-rotation | |
| CA2752202C (en) | Method and apparatus for pre-spinning rotor forgings | |
| Lüddecke et al. | On mixed flow turbines for automotive turbocharger applications | |
| EP1207005A1 (en) | Heat treatment of weld repaired gas turbine engine components | |
| CN114250352B (en) | Method for improving service stability of superalloy disc or ring and obtained disc or ring | |
| CN107092728B (en) | Fatigue test method for tensioning shaft of turbofan engine | |
| CN112730117B (en) | Temperature-changing and load-changing creep equivalent acceleration spectrum compiling method | |
| CN116818555B (en) | Method for determining pre-rotation speed of nickel-based superalloy wheel disc blank | |
| EP3326747B1 (en) | Nickel-based alloy regenerated member, and method for manufacturing same | |
| EP3505647A1 (en) | Nickel-based alloy regenerated member and method for manufacturing same | |
| CN114531884B (en) | Method for stress relief by rotation | |
| CN1079840C (en) | Iron-nickel superalloy of type in 706 | |
| KR100957984B1 (en) | Friction welding process of Two-stroke Diesel engine turbocharger rotor shaft | |
| US20230016175A1 (en) | Method for Internal Stress Regulation in Superalloy Disk forgings by Pre-spinning | |
| Alban et al. | Characterizing compressor rotor unclamp in a gas turbine engine | |
| FR3125335A1 (en) | Method of regulating residual stresses in blank disc forgings of superalloy by pre-rotation | |
| AU2021206812B1 (en) | Method for Internal Stress Regulation in Superalloy Disk forgings by Pre-spinning | |
| WO2013101692A1 (en) | Method of predicting quench cracking in components formed by high deformation processes | |
| CN117210667B (en) | Turbine disc residual stress composite regulation and control method | |
| GB2609043A (en) | Method for internal stress regulation in superalloy disk forgings by pre-spinning | |
| CN115982958B (en) | Material creep fatigue life prediction method based on engineering damage mechanics | |
| Huang et al. | Unified modeling of high temperature deformations of a Ni-based polycrystalline wrought superalloy under tension-compression, cyclic, creep and creep-fatigue loadings | |
| Muschlitz et al. | Evaluation of TiMMC for gas turbine engine rotating components | |
| Schetky et al. | Shape memory alloy adaptive control of gas turbine engine compressor blade tip clearance | |
| Huang et al. | Short-life turbine blade rack extension analysis and life prediction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |