A single crystal superalloy blade recrystallization detection method, device and equipment

Abstract

The present application relates to single crystal superalloy blade recrystallization detection technical field, disclose a kind of single crystal superalloy blade recrystallization detection method, device and equipment, the method includes: constructing single crystal superalloy recrystallization database;The single crystal superalloy creep sample containing recrystallization is subjected to creep test to obtain corresponding single crystal superalloy and corresponding blade under corresponding service condition recrystallization damage tolerance;The coordinate information of the deformed position of the single crystal superalloy blade to be detected is obtained;Corresponding parameters are input into database to obtain the cross-sectional recrystallization area fraction and maximum recrystallization depth of the deformed position of the single crystal superalloy blade;Whether the cross-sectional recrystallization area fraction and maximum recrystallization depth of the deformed position obtained are less than the corresponding recrystallization damage tolerance is judged to obtain detection result.The detection accuracy is high, the yield is improved, and the production quality acceptance standard of single crystal superalloy blade or test bar, nondestructive testing is expanded to provide reference.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of recrystallization detection of single crystal high-temperature alloy blades, and particularly relates to a recrystallization detection method, device and equipment for single crystal high-temperature alloy blades. BACKGROUND

[0002] The cracks or fracture failures of single crystal high-temperature alloy blades in the process of trial operation or formal service are related to the recrystallization of the blade surface. The cold deformation such as mechanical damage and bump caused by the removal of the core during the manufacturing process of the single crystal high-temperature alloy blade is difficult to avoid. When the blade is subjected to heat treatment or over-temperature service, it is easy to stay at a temperature higher than the recrystallization temperature, so that local recrystallization occurs on the blade surface. The recrystallization is static local recrystallization, and the recrystallization in the form of equiaxed grains introduces transverse grain boundaries to the alloy surface. The recrystallization contains a large amount of grain boundary strengthening elements, which is completely different from the original structure. The formation of such a region will make the creep resistance of the alloy worse, seriously damage the high-temperature creep resistance of the alloy, and even have a serious impact on the safe service of the aero-engine or gas turbine.

[0003] The existing technology for detecting and evaluating the recrystallization in the directionally solidified blade is to select the most serious recrystallization blade from the same batch for recrystallization depth detection during the recrystallization macroscopic examination. When the recrystallization depth of the sampled blade meets the blade technical conditions, the batch of blades is qualified. This method has poor accuracy and is prone to errors. For the recrystallization depth detection, the change of the microstructure after the recrystallization of the directionally solidified blade is used to display the recrystallization grain morphology by etching. The recrystallization depth is measured by the surface etching and cross-section detection methods, and the recrystallization is evaluated based on the recrystallization depth. Since the detection process requires etching and sectioning of the blade, it is time-consuming and inefficient. At the same time, since the blade needs to be dissected for measurement and analysis, the serviceable blade cannot continue to serve due to dissection, resulting in increased economic losses due to the scrap of the blade. SUMMARY

[0004] Therefore, the embodiments of the present application provide a recrystallization detection method, device and equipment for single crystal high-temperature alloy blades to solve the problems of low accuracy and poor efficiency in the recrystallization detection of single crystal high-temperature alloy blades in the prior art. When analyzing the blade to be evaluated, the blade does not need to be dissected, but only needs to be measured for analysis. This not only saves a lot of time, but also enables the serviceable blade to continue to serve without damage evaluation, thereby reducing the economic losses due to the scrap of the blade caused by dissection.

[0005] In a first aspect, the embodiments of the present application provide a recrystallization detection method for single crystal high-temperature alloy blades, comprising:

[0006] constructing a single crystal high-temperature alloy recrystallization database;

[0007] Under preset conditions, creep tests are performed on single crystal superalloy creep samples containing recrystallization with different recrystallization area fractions and maximum recrystallization depths under the same test conditions, and corresponding recrystallization damage tolerances of the single crystal superalloy and corresponding blades under corresponding service conditions are obtained;

[0008] Corresponding parameters of the coordinate information of the deformed position of the single crystal superalloy blade to be detected are obtained, and are input into the single crystal superalloy recrystallization database to obtain the cross-sectional recrystallization area fraction and the maximum recrystallization depth of the deformed position of the single crystal superalloy blade;

[0009] It is judged whether the cross-sectional recrystallization area fraction and the maximum recrystallization depth of the deformed position are less than the corresponding recrystallization damage tolerance, if yes, the detection result corresponding to the deformed position is safe, if not, the detection result corresponding to the deformed position is unsafe.

[0010] Compared with the traditional detection and evaluation method of recrystallization in the directional solidification blade, the single crystal superalloy blade recrystallization detection method provided by the embodiment has higher accuracy, greatly helps to reduce the defective rate and waste rate of the single crystal superalloy blade, and improves the yield rate. Meanwhile, the single crystal superalloy blade or test rod production quality acceptance standard, nondestructive testing method expansion provides technical reference, the detection and evaluation method of recrystallization in the directional solidification high-temperature alloy blade in the industry standard is expanded and improved.

[0011] In an optional implementation, the method further includes:

[0012] The deformed position with an unsafe detection result is given a safety warning, so as to prompt the staff to perform corresponding repair processing or other post-processing work on the deformed position.

[0013] When the unsafe position coordinate is detected, the embodiment of the application sends a warning signal such as sound and light to prompt the staff to process in time, so as to ensure the safe operation of the blade, greatly helps to reduce the defective rate and waste rate of the single crystal superalloy blade, and improves the yield rate.

[0014] In an optional implementation, the method further includes:

[0015] The single crystal superalloy test rod is coarsely cut along the direction perpendicular to the <0 0 1> crystal to obtain a circular test sample or a square test sample with a fixed crystal surface;

[0016] Determine the compression crystal direction of the circular sample or the compression crystal plane of the square sample, perform an indentation test along the compression crystal direction of the circular sample or perpendicular to the compression crystal plane of the square sample, perform heat treatment on the circular or square sample after indentation and keep warm for a preset time, then perform air cooling, non-contact measurement of the indentation on the sample surface, and obtain indentation parameters;

[0017] Cut the sample along the direction perpendicular to the <0 0 1> crystal direction at a preset distance from the center of the indentation, and grind and polish the sample to the center of the indentation, and obtain recrystallization parameters to obtain recrystallization parameters;

[0018] Obtain alloy parameters, shape parameters and deformation parameters of the circular sample or the square sample;

[0019] Correspond one-to-one between the indentation parameters, recrystallization parameters, alloy parameters, shape parameters and deformation parameters to obtain a single crystal superalloy recrystallization database.

[0020] The embodiment of the application establishes a one-to-one correspondence between the indentation parameters, recrystallization parameters, alloy parameters, shape parameters and deformation parameters of the single crystal superalloy to construct a single crystal superalloy recrystallization database, which can comprehensively include related data of single crystal superalloy recrystallization, and is beneficial to more accurately matching the cross-sectional recrystallization area fraction and the maximum recrystallization depth of the coordinate information of the deformed position of the single crystal superalloy blade.

[0021] In an alternative embodiment, the indentation parameters include: height, width, volume, inclination angle parameters of the indentation;

[0022] The recrystallization parameters include: cross-sectional recrystallization area fraction and maximum recrystallization depth, wherein the cross-sectional recrystallization area fraction TRF=S0 / S, wherein S0 is the area of the cross-sectional recrystallization region, and S is the total area of the cross section;

[0023] The alloy parameters include: alloy type, chemical composition, heat treatment system, physical, elastic and chemical properties, and mechanical properties of the single crystal superalloy;

[0024] The shape parameters include: sample size of the circular sample or the square sample;

[0025] The deformation parameters include: deformation crystal direction or crystal plane parameters of the circular sample or the square sample.

[0026] The embodiment of the application can effectively improve the accuracy and reliability of the single crystal superalloy recrystallization database by obtaining parameter data of each level of the single crystal superalloy.

[0027] In an alternative embodiment, the creep test is performed on the creep samples with different recrystallization area fractions and maximum recrystallization depths under the preset conditions to obtain the recrystallization damage tolerance of the corresponding single-crystal superalloy and the corresponding blade under the corresponding service condition, including:

[0028] The creep time T of the creep sample at the preset creep rate is taken as the creep life of the single-crystal superalloy circular creep sample or square creep sample containing recrystallization under the corresponding service condition;

[0029] The creep test is performed on the circular creep samples or square creep samples with different recrystallization area fractions and maximum recrystallization depths under the same test conditions;

[0030] When the creep life is T, the corresponding cross-sectional recrystallization area fraction and maximum recrystallization depth are the recrystallization damage tolerance of the single-crystal superalloy and the corresponding blade under the corresponding service condition, and the corresponding cross-sectional recrystallization area fraction is represented as TRF max , and the maximum recrystallization depth is represented as DR max .

[0031] The recrystallization damage tolerance under the corresponding service condition is obtained by performing the creep test on the creep sample, and a detection threshold standard is provided for the recrystallization detection of the single-crystal superalloy blade.

[0032] In an alternative embodiment, the coordinate information corresponding parameters of the deformed position of the single-crystal superalloy blade to be detected are obtained, including:

[0033] The non-recrystallized unserved blade that has completed all production links is scanned to obtain three-dimensional coordinate information of the blade, and the blade is taken as a standard blade;

[0034] The coordinate information of the deformed position of the single-crystal superalloy blade to be detected is scanned and compared with the standard blade to determine the deformed height, width, volume, and inclination angle parameters of the coordinate information of the deformed position;

[0035] The temperature field and stress field of the single-crystal superalloy blade to be detected are analyzed to obtain the service temperature and stress range of the deformed position.

[0036] The coordinate information corresponding parameters of the deformed position of the single-crystal superalloy blade to be detected are matched with the single-crystal superalloy recrystallization database to obtain the cross-sectional recrystallization area fraction and maximum recrystallization depth of the deformed position of the single-crystal superalloy blade, which are used to detect whether it is safe.

[0037] In an optional embodiment, if the cross-section recrystallization area fraction and the maximum recrystallization depth of the deformed position are both less than the corresponding TRF and DR under the same service condition, it is judged that the detection result corresponding to the deformed position is safe, and if either the cross-section recrystallization area fraction or the maximum recrystallization depth of the deformed position is not less than the TRF and DR under the same service condition, the detection result corresponding to the deformed position is unsafe.

[0038] When the cross-section recrystallization area fraction and the maximum recrystallization depth of the deformed position are both less than the corresponding TRF and DR under the same service condition, it is judged that the detection result corresponding to the deformed position is safe, and if either the cross-section recrystallization area fraction or the maximum recrystallization depth of the deformed position is not less than the TRF and DR under the same service condition, the detection result corresponding to the deformed position is unsafe. max and DR max When the cross-section recrystallization area fraction and the maximum recrystallization depth of the deformed position are both less than the corresponding TRF and DR under the same service condition, it is judged that the detection result corresponding to the deformed position is safe, and if either the cross-section recrystallization area fraction or the maximum recrystallization depth of the deformed position is not less than the TRF and DR under the same service condition, the detection result corresponding to the deformed position is unsafe. max and DR max When the cross-section recrystallization area fraction and the maximum recrystallization depth of the deformed position are both less than the corresponding TRF and DR under the same service condition, it is judged that the detection result corresponding to the deformed position is safe, and if either the cross-section recrystallization area fraction or the maximum recrystallization depth of the deformed position is not less than the TRF and DR under the same service condition, the detection result corresponding to the deformed position is unsafe.

[0039] The embodiment of the present application compares the recrystallization damage tolerance corresponding to the cross-section recrystallization area fraction and the maximum recrystallization depth of the deformed position of the single-crystal high-temperature alloy blade to be detected, and if at least one of the two is not less than the corresponding tolerance, the detection result is unsafe, and timely maintenance or replacement is required, thereby providing technical support for the staff.

[0040] In a second aspect, the embodiment of the present application provides a single-crystal high-temperature alloy blade recrystallization detection device, which comprises:

[0041] A database construction module is configured to construct a single-crystal high-temperature alloy recrystallization database.

[0042] A recrystallization damage tolerance acquisition module is configured to perform a creep test on single-crystal high-temperature alloy creep samples with different recrystallization area fractions and maximum recrystallization depths under the same test conditions under a preset condition, to obtain the recrystallization damage tolerance of the single-crystal high-temperature alloy and the corresponding blade under the corresponding service condition.

[0043] A to-be-detected blade data acquisition module is configured to acquire coordinate information corresponding parameters of the deformed position of the single-crystal high-temperature alloy blade to be detected, and input the same into the single-crystal high-temperature alloy recrystallization database, to obtain the cross-section recrystallization area fraction and the maximum recrystallization depth of the deformed position of the single-crystal high-temperature alloy blade.

[0044] A detection module is configured to judge whether the cross-section recrystallization area fraction and the maximum recrystallization depth of the deformed position are less than the corresponding recrystallization damage tolerance, and if yes, the detection result corresponding to the deformed position is safe, and if not, the detection result corresponding to the deformed position is unsafe.

[0045] In a third aspect, the embodiment of the present application provides a computer device, which comprises:

[0046] A memory and a processor are communicatively connected between each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the single crystal superalloy blade recrystallization detection method provided by the embodiments of the present application.

[0047] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium storing computer instructions for causing a computer to perform the single crystal superalloy blade recrystallization detection method provided by the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0049] Figure 1 is a flowchart schematic diagram of the single crystal superalloy blade recrystallization detection method according to the embodiments of the present application;

[0050] Figure 2 is a flowchart schematic diagram of another single crystal superalloy blade recrystallization detection method according to the embodiments of the present application;

[0051] Figure 3 is a flowchart schematic diagram of still another single crystal superalloy blade recrystallization detection method according to the embodiments of the present application;

[0052] Figure 4 is a schematic diagram of a common crystal direction according to the embodiments of the present application;

[0053] Figure 5 is a structural block diagram of a single crystal superalloy blade recrystallization detection device according to the embodiments of the present application;

[0054] Figure 6 is a hardware structure schematic diagram of a computer device according to the embodiments of the present application. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0056] The embodiment of the present application provides a single-crystal high-temperature alloy blade recrystallization detection method, which is suitable for directional solidification high-temperature alloy blade recrystallization detection, and has the effect of being more accurate, reducing the single-crystal high-temperature alloy blade failure rate and waste product rate, and improving the finished product rate.

[0057] According to the embodiment of the present application, a single-crystal high-temperature alloy blade recrystallization detection method is provided, and it should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a group of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that here.

[0058] In the embodiment, a single-crystal high-temperature alloy blade recrystallization detection method is provided, which can be used in the terminal device such as a computer, Figure 1 The flowchart of the single-crystal high-temperature alloy blade recrystallization detection method according to the embodiment of the present application is shown in Figure 1 The flowchart includes the following steps:

[0059] Step S101: Construct a single-crystal high-temperature alloy recrystallization database. Specifically, the one-to-one correspondence between the single-crystal high-temperature alloy indentation parameters, recrystallization parameters, alloy parameters, shape parameters and deformation parameters is established to construct the single-crystal high-temperature alloy recrystallization database. It should be noted that the alloy will recrystallize only in the recrystallization temperature range, and the corresponding recrystallization temperature range of different types of alloys is different.

[0060] Step S102: Under the preset conditions, the single-crystal high-temperature alloy creep samples containing recrystallization with different content recrystallization area fraction and maximum recrystallization depth are subjected to creep test under the same test conditions to obtain the recrystallization damage tolerance of the corresponding single-crystal high-temperature alloy and the corresponding blade under the corresponding service condition.

[0061] Specifically, the circular creep samples or square creep samples with different content recrystallization area fraction and maximum recrystallization depth are subjected to creep test under the same test conditions, and the recrystallization damage tolerance of the blade under the corresponding service condition, the cross-sectional recrystallization area fraction at this time is represented by TRF max , and the maximum recrystallization depth is represented by D Rmax .

[0062] Step S103: Obtain the coordinate information corresponding parameters of the deformed position of the single-crystal high-temperature alloy blade to be detected, and input them into the single-crystal high-temperature alloy recrystallization database to obtain the cross-sectional recrystallization area fraction and the maximum recrystallization depth of the deformed position of the single-crystal high-temperature alloy blade.

[0063] Specifically, the 3D scanner is used to perform three-dimensional reverse measurement on the surface of the single crystal superalloy blade after heat treatment to obtain coordinate information of the deformed position. The three-dimensional reverse measurement includes three-dimensional data measurement, three-dimensional data processing, three-dimensional reconstruction, and three-dimensional model data output. First, a heavy-duty turbine blade positioning tool is used to position the blade, the three-dimensional scanner is calibrated, a scanning reference is established, and the blade is scanned continuously at 45°. After scanning around the blade for one revolution, a three-dimensional point cloud map and three-dimensional point cloud data of the blade are obtained, and the coordinate information of the deformed position of the blade is obtained after processing the data. Further, the 3D profilometer is used to accurately scan the coordinate information of the deformed position of the single crystal superalloy blade to determine the corresponding deformation volume and deformation depth of the coordinate information.

[0064] In an optional embodiment, the temperature field of the single crystal superalloy blade is analyzed by using the finite element method. Based on the three-dimensional solid model of the single crystal superalloy blade, the finite element model of the single crystal superalloy blade is established by using ANSYS software, the element properties generated by the finite element model of the single crystal superalloy blade are set, the finite element model of the single crystal superalloy blade is meshed, the finite element model of the single crystal superalloy blade is loaded and solved, and the temperature field of the deformed position is analyzed by using a general post-processor. The service temperature and stress range of the deformed position are analyzed. The deformation height, width, volume, inclination angle parameters and service temperature and stress range of the coordinate information of the deformed position of the single crystal superalloy blade are input into the single crystal superalloy recrystallization database, and the cross-sectional recrystallization area fraction and maximum recrystallization depth of the deformed position of the single crystal superalloy blade are output.

[0065] Step S104: Determine whether the cross-sectional recrystallization area fraction and maximum recrystallization depth of the deformed position are less than the corresponding recrystallization damage tolerance. If yes, the detection result of the deformed position is safe. If no, the detection result of the deformed position is unsafe.

[0066] Specifically, when the cross-sectional recrystallization area fraction and maximum recrystallization depth of the deformed position are less than the corresponding TRF max and DR max under the same service condition, it is determined that the detection result of the deformed position is safe. When the cross-sectional recrystallization area fraction and maximum recrystallization depth of the deformed position are not less than the corresponding TRF max and DR max under the same service condition, the detection result of the deformed position is unsafe.

[0067] Through the steps S101 to S104, the single crystal high-temperature alloy blade recrystallization detection method provided by the embodiment of the present application has higher accuracy compared with the detection and evaluation method of the recrystallization in the traditional directional solidification blade, and greatly helps to reduce the single crystal high-temperature alloy blade failure rate, waste rate and improve the yield rate. At the same time, it provides technical reference for the development of the production quality acceptance standard of the single crystal high-temperature alloy blade or test rod, the nondestructive testing method, and expands and perfects the detection and evaluation method of the recrystallization in the directional solidification high-temperature alloy blade in the industry standard.

[0068] In the embodiment, a single crystal high-temperature alloy blade recrystallization detection method is provided, which can be used in the mobile terminal such as the mobile phone, the tablet computer and the like. Figure 2 The flow chart of the single crystal high-temperature alloy blade recrystallization detection method according to the embodiment of the present application is shown in FIG. 1, which includes the following steps: Figure 2

[0069] Step S201: Constructing a single crystal high-temperature alloy recrystallization database. Specifically, please refer to the step S101 of the embodiment shown in FIG. 1 for details, which will not be repeated here. Figure 1

[0070] Step S202: Under the preset condition, the single crystal high-temperature alloy creep samples containing recrystallization with different content of recrystallization area fraction and maximum recrystallization depth are subjected to creep test under the same test condition, so as to obtain the recrystallization damage tolerance of the corresponding single crystal high-temperature alloy and the corresponding blade under the corresponding service condition. Specifically, please refer to the step S102 of the embodiment shown in FIG. 1 for details, which will not be repeated here. Figure 1

[0071] Step S203: Obtain the coordinate information corresponding parameters of the deformed position of the single crystal high-temperature alloy blade to be detected, and input into the single crystal high-temperature alloy recrystallization database, so as to obtain the cross-sectional recrystallization area fraction and the maximum recrystallization depth of the deformed position of the single crystal high-temperature alloy blade. Specifically, please refer to the step S103 of the embodiment shown in FIG. 1 for details, which will not be repeated here. Figure 1

[0072] Step S204: Determine whether the cross-sectional recrystallization area fraction and the maximum recrystallization depth of the deformed position are less than the corresponding recrystallization damage tolerance. If yes, the detection result of the deformed position is safe, and if not, the detection result of the deformed position is unsafe. Specifically, please refer to the step S104 of the embodiment shown in FIG. 1 for details, which will not be repeated here. Figure 1

[0073] ​​​​​Step S205: safety warning is performed on the unsafe deformation position, which is used to prompt the staff to perform corresponding repair and other post-processing work on the deformation position. Specifically, when the unsafe position coordinates are detected, a sound and light warning signal is sent to prompt the staff to handle it in time, so as to ensure the safe operation of the blade.

[0074] In the embodiment, a single crystal high-temperature alloy blade recrystallization detection method is provided, which can be used in the mobile terminal such as a mobile phone, a tablet computer and the like. Figure 3 The flowchart of the single crystal high-temperature alloy blade recrystallization detection method according to the embodiment of the present application is shown in FIG. 3, which includes the following steps: Figure 3

[0075] Step S301: a single crystal high-temperature alloy recrystallization database is constructed. Specifically, step S301 includes the following steps:

[0076] Step S3011: a single crystal high-temperature alloy test rod is obtained by rough cutting along the direction perpendicular to the <0 0 1> crystal direction to obtain a circular sample or a square sample with a fixed crystal surface. Common crystal directions are shown in FIG. 2. Figure 4 In the embodiment of the present application, the single crystal high-temperature alloy test rod is obtained by rough cutting along the direction perpendicular to the <0 0 1> crystal direction, so that the sample can be obtained conveniently and quickly.

[0077] Specifically, a circular sample of ΦD1*L1 or a square sample of L1*W1 with a fixed crystal surface is obtained, and the original cross-sectional area after rough cutting should be greater than or equal to 7mm 2 . The diameter of the circular creep test sample gauge section is ΦD0, the diameter of the circular sample is ΦD1, ΦD0+2mm≤ΦD1 is set to completely remove the indentation notch and retain the machining allowance, and ΦD1≤ΦD0+4mm is set to ensure that the recrystallization is not completely removed. The length of the circular sample is L1, the diameter of the hardness tester indenter for indentation is ΦD2, and L1≥2*ΦD2 is set to ensure that the circular sample can be fully deformed in the length direction. The length of the square sample is L1, the diameter of the hardness tester indenter for indentation is ΦD2, and L1≥2*ΦD2 is set to ensure that the square sample can be fully deformed in the length direction. The surface roughness Ra of the circular or square sample is less than or equal to 0.4, so as to reduce the residual deformation of the sample surface as much as possible and prevent recrystallization caused by surface residual deformation in the subsequent heat treatment process.

[0078] Step S3012: the compression crystal direction of the circular sample or the compression crystal surface of the square sample is determined, indentation test is performed on the compression crystal direction of the circular sample or the compression crystal surface perpendicular to the square sample, and the circular or square sample after indentation is subjected to heat treatment and insulation for a predetermined time and then air cooling. The indentation on the sample surface is measured by a non-contact method to obtain indentation parameters.​

[0079] Specifically, the compression crystal direction [X1Y1Z1] of the circular sample or the compression crystal plane (x1y1z1) of the square sample is determined by metallographic method or X-ray back Laue photography method, and the indentation test is performed along the compression crystal direction [X1Y1Z1] of the circular sample or perpendicular to the compression crystal plane (x1y1z1) of the square sample by using a hardness tester. The indentation position should be located at one-half of the length of the circular sample or the square sample to prevent the sample from being lifted at one end during indentation and thus deviating from the indentation position. The hardness tester can be selected from a Brinell hardness tester, a Vickers hardness tester, a Rockwell hardness tester, or the like. The heat treatment temperature needs to be in the recrystallization temperature range of the test alloy to cause recrystallization. The heat treatment can be vacuum heat treatment to prevent the test results from being interfered by oxidation factors during heat treatment. The holding time can be reasonably set according to the specific alloy. The indentation on the sample surface is measured by using a 3D profiler in a non-contact manner to obtain indentation parameters. The indentation parameters include the height, width, volume, and inclination angle parameters of the indentation, and the 3D profile of the sample indentation surface microstructure is reconstructed by using the 3D profiler for automatic statistical analysis.

[0080] Step S3013: The sample is cut along the <0 0 1> crystal direction at a predetermined distance from the center of the indentation, and the sample is ground and polished to the center of the indentation to obtain recrystallization parameters. Specifically, the sample is cut along the <0 0 1> crystal direction at a position near the center of the indentation, and the sample is ground and polished to the center of the indentation to obtain recrystallization parameters. The recrystallization parameters include a cross-sectional recrystallization area fraction and a maximum recrystallization depth. The cross-sectional recrystallization area fraction TRF = S0 / S, where S0 is the area of the recrystallization region of the cross section, and S is the total area of the cross section. The cross-sectional recrystallization area fraction can be observed and calculated by using an EBSD analysis method. The maximum recrystallization depth is the maximum value of the recrystallization depth from the sample surface to the bottom of the recrystallization. The maximum recrystallization depth can be observed and calculated by using an EBSD analysis method.

[0081] Step S3014: Obtain alloy parameters, shape parameters, and deformation parameters of the circular sample or the square sample. Specifically, the alloy parameters include the alloy type, chemical composition, heat treatment system, physical, elastic and chemical properties, and mechanical properties of the single crystal high-temperature alloy. The shape parameters include the sample size of the circular sample or the square sample. The deformation parameters include the deformation crystal direction or crystal plane parameters of the circular sample or the square sample, and the crystal plane parameters include the crystal plane spacing, the plane density of the crystal plane, and the plane density of the crystal plane.

[0082] Step S3015: One-to-one correspondence is established between the indentation parameters, the recrystallization parameters, the alloy parameters, the shape parameters, and the deformation parameters to obtain a single crystal high-temperature alloy recrystallization database.

[0083] Step S302: Under the preset conditions, the single crystal superalloy creep specimens containing recrystallization with different contents of recrystallization area fraction and maximum recrystallization depth are subjected to creep test under the same test conditions to obtain the recrystallization damage tolerance of the corresponding single crystal superalloy and the corresponding blade under the corresponding service condition. Specifically, step S302 includes:

[0084] Step S3021, the creep time T of the creep specimen at a preset creep rate (for example, 1%) is taken as the creep life of the single crystal superalloy circular creep specimen or square creep specimen containing recrystallization under the corresponding service condition;

[0085] Step S3022, the circular creep specimens or square creep specimens with different contents of recrystallization area fraction and maximum recrystallization depth are subjected to creep test under the same test conditions;

[0086] In the embodiment of the present application, the process of preparing the local recrystallization mechanical property sample is as follows: the alloy test bar is roughly cut along a fixed direction; the alloy test bar is finely processed into an intermediate sample, and the intermediate sample is subjected to local indentation deformation with different indentation forces, and then the intermediate sample is subjected to heat treatment and kept for a certain time. Under the premise that the heat treatment system is the same, the indentation force applied to the intermediate sample is different, and the obtained recrystallization content is different, that is, the cross-sectional recrystallization area fraction and the maximum recrystallization depth for quantifying the recrystallization are different; then the intermediate sample is finely processed into a target sample to complete the preparation of the local recrystallization mechanical property sample, and then the prepared sample is subjected to creep test under the same test conditions according to the national standard as a creep specimen.

[0087] Step S3023, when the creep life is T, the corresponding cross-sectional recrystallization area fraction and the maximum recrystallization depth are the recrystallization damage tolerance of the single crystal superalloy and the corresponding blade under the corresponding service condition, and the corresponding cross-sectional recrystallization area fraction is represented as TRF max , and the maximum recrystallization depth is represented as DR max .

[0088] Step S303: Obtain the coordinate information corresponding parameters of the deformed position of the single crystal superalloy blade to be detected, and input them into the single crystal superalloy recrystallization database to obtain the cross-sectional recrystallization area fraction and the maximum recrystallization depth of the deformed position of the single crystal superalloy blade. Specifically, the coordinate information corresponding parameters of the deformed position of the single crystal superalloy blade to be detected include:

[0089] A1, scanning the unserved blade without recrystallization which has completed all production links to obtain the three-dimensional coordinate information of the blade, and taking the blade as a standard blade;

[0090] A2, scanning the coordinate information of the deformed position of the single crystal high-temperature alloy blade of the same type to be detected and comparing with the standard blade to determine the deformed height, width, volume, and inclination angle parameters corresponding to the coordinate information of the deformed position; it should be noted that the single crystal high-temperature alloy blade to be detected can be a blade at the time of factory delivery or a single crystal high-temperature alloy blade that has been in service, when it is a single crystal high-temperature alloy blade to be detected, it can be used to detect the yield of the blade at the time of factory delivery, and when it is a single crystal high-temperature alloy blade that has been in service, it is used to detect the deformation caused by the bumps during service.

[0091] A3, analyzing the temperature field and stress field of the single crystal high-temperature alloy blade to be detected to obtain the service temperature and stress range of the deformed position.

[0092] Step S304: determining whether the cross-sectional recrystallization area fraction and the maximum recrystallization depth of the deformed position are less than the corresponding recrystallization damage tolerance, if yes, the detection result corresponding to the deformed position is safe, if not, the detection result corresponding to the deformed position is unsafe. Specifically, when the cross-sectional recrystallization area fraction and the maximum recrystallization depth of the deformed position are less than the TRF max and DR max under the same service condition at the same time, it is determined that the detection result corresponding to the deformed position is safe, and when the cross-sectional recrystallization area fraction and the maximum recrystallization depth of the deformed position are not less than the TRF max and DR max under the same service condition at the same time, the detection result corresponding to the deformed position is unsafe.

[0093] The embodiment of the application compares the recrystallization damage tolerance corresponding to the cross-sectional recrystallization area fraction and the maximum recrystallization depth of the deformed position of the single crystal high-temperature alloy blade to be detected, and when at least one of the two is not less than the corresponding tolerance, the detection result is unsafe, and timely repair or replacement is required, providing technical support for the staff.

[0094] In the embodiment, a single crystal high-temperature alloy blade recrystallization detection device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and will not be described again. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware is also possible and contemplated.

[0095] The embodiment provides a single crystal high-temperature alloy blade recrystallization detection device, as shown in Figure 5 , comprising:

[0096] The database construction module 501 is configured to construct a single-crystal superalloy recrystallization database.

[0097] The recrystallization damage tolerance acquisition module 502 is configured to perform a creep test on the single-crystal superalloy creep sample containing recrystallization under the same test conditions under a preset condition, to obtain a recrystallization damage tolerance of the single-crystal superalloy and a corresponding blade under a corresponding service condition.

[0098] The to-be-detected blade data acquisition module 503 is configured to acquire coordinate information of a deformed position of a single-crystal superalloy blade to be detected and corresponding parameters, and input the coordinate information and the corresponding parameters into the single-crystal superalloy recrystallization database, to obtain a cross-sectional recrystallization area fraction and a maximum recrystallization depth of the deformed position of the single-crystal superalloy blade.

[0099] The detection module 504 is configured to determine whether the cross-sectional recrystallization area fraction and the maximum recrystallization depth of the deformed position are less than the corresponding recrystallization damage tolerance, and if yes, the detection result of the deformed position is safe, and if not, the detection result of the deformed position is unsafe.

[0100] In some optional embodiments, the database construction module 501 comprises:

[0101] The sample acquisition unit is configured to obtain a circular sample or a square sample with a fixed crystal plane by roughly cutting a single-crystal superalloy test bar along a direction perpendicular to the <0 0 1> crystal direction.

[0102] The indentation parameter acquisition unit is configured to determine a pressed crystal direction of the circular sample or a pressed crystal plane of the square sample, perform an indentation test along the pressed crystal direction of the circular sample or perpendicular to the pressed crystal plane of the square sample, perform heat treatment on the circular or square sample after indentation and keep warm for a preset time, and then perform air cooling, and perform non-contact measurement on the indentation on the surface of the sample to obtain indentation parameters.

[0103] The recrystallization parameter acquisition unit is configured to cut the sample along a direction perpendicular to the <0 0 1> crystal direction at a preset distance from the center of the indentation, and grind and polish the sample to the center of the indentation, to statistically obtain recrystallization parameters.

[0104] The alloy parameter, shape parameter and deformation parameter acquisition unit is configured to acquire alloy parameters, shape parameters and deformation parameters of the circular sample or the square sample.

[0105] The database establishment unit is configured to one-to-one correspond the indentation parameters, the recrystallization parameters, the alloy parameters, the shape parameters and the deformation parameters, to obtain the single-crystal superalloy recrystallization database.

[0106] In some optional embodiments, the indentation parameters include: height, width, volume, inclination angle parameters of the indentation; the recrystallization parameters include: cross-sectional recrystallization area fraction and maximum recrystallization depth, wherein the cross-sectional recrystallization area fraction TRF=S0 / S, wherein S0 is the area of the cross-sectional recrystallization region, and S is the total area of the cross section; the alloy parameters include: alloy type, chemical composition, heat treatment system, physical, elastic and chemical properties, mechanical properties of the single crystal superalloy; the shape parameters include: sample size of the round sample or the square sample; the deformation parameters include: deformation crystal orientation or crystal plane parameters of the round sample or the square sample.

[0107] In some optional embodiments, the recrystallization damage tolerance obtaining module 502 includes:

[0108] A creep life setting unit is configured to set the creep time T of the creep sample at a preset creep rate as the creep life of the single crystal superalloy round creep sample or the single crystal superalloy square creep sample containing recrystallization under the corresponding service condition.

[0109] A creep test unit is configured to perform creep tests on the round creep samples or the square creep samples with different recrystallization area fractions and maximum recrystallization depths under the same test conditions.

[0110] A recrystallization damage tolerance obtaining unit is configured to obtain the cross-sectional recrystallization area fraction TRF and the maximum recrystallization depth DR corresponding to the creep life T, which are the recrystallization damage tolerances of the single crystal superalloy and the corresponding blade under the corresponding service condition. max max .

[0111] In some optional embodiments, the to-be-detected blade data obtaining module 503 obtains coordinate information corresponding parameters of the deformed position of the to-be-detected single crystal superalloy blade, including: scanning the coordinate information of the deformed position of the to-be-detected single crystal superalloy blade to determine the deformed volume and the deformed depth corresponding to the deformed position; and analyzing the temperature field of the to-be-detected single crystal superalloy blade to obtain the service temperature range of the deformed position.

[0112] Further function descriptions of the above-mentioned modules and units are the same as those of the corresponding embodiments, and will not be described here.

[0113] The single crystal superalloy blade recrystallization detection device in the embodiment is presented in the form of a functional unit. The unit here refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and a memory executing one or more software or fixed programs, and / or other devices that can provide the above-mentioned functions.​

[0114] Further functional descriptions of the above modules are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0115] This invention also provides a computer device having the above-described features. Figure 5 The device shown is for detecting recrystallization of single-crystal high-temperature alloy blades.

[0116] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 6 As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 6 Take a processor 10 as an example.

[0117] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0118] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0119] The memory 20 can include a program storage area and a data storage area. The program storage area can store an operating system, application programs required for at least one function, and the like. The data storage area can store data created according to the use of the computer device, and the like. In addition, the memory 20 can include a high-speed random access memory, and can further include a non-transitory memory such as at least one of a magnetic disk storage device, a flash memory device, or other non-transitory solid state memory device. In some alternative embodiments, the memory 20 can optionally include a memory disposed remotely from the processor 10, which can be connected to the computer device through a network. Examples of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0120] The memory 20 can include a volatile memory such as a random access memory, and can further include a non-volatile memory such as a flash memory, a hard disk, or a solid state disk. The memory 20 can also include a combination of the above-mentioned types of memory.

[0121] The computer device further includes a communication interface 30 for communication of the computer device with other devices or communication networks.

[0122] The embodiments of the present application also provide a computer readable storage medium. The above-mentioned method according to the embodiments of the present application can be implemented in hardware, firmware, or as computer code recorded on a storage medium, or stored in a remote storage medium or a non-transitory machine readable storage medium and downloaded to a local storage medium through a network, so that the method described herein can be processed by such software on a storage medium using a general purpose computer, a special purpose processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, or a solid state disk, and the like. Further, the storage medium can also include a combination of the above-mentioned types of memory. It can be understood that the computer, processor, microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the method shown in the above-mentioned embodiments.

[0123] Although the embodiments of the present application have been described with reference to the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes are intended to fall within the scope of the appended claims.

Claims

1. A method for detecting recrystallization of single-crystal superalloy blades, characterized in that, include: Construct a database of recrystallization of single-crystal superalloys; Creep tests were conducted on single-crystal superalloy creep samples with different recrystallization area fractions and maximum recrystallization depths under the same test conditions under preset conditions, and the recrystallization damage tolerance of the corresponding single-crystal superalloy and its corresponding blades under the corresponding service conditions was obtained. The coordinate information and corresponding parameters of the deformation location of the single-crystal high-temperature alloy blade to be detected are obtained and input into the single-crystal high-temperature alloy recrystallization database to obtain the cross-sectional recrystallization area fraction and maximum recrystallization depth of the single-crystal high-temperature alloy blade at the deformation location. Determine whether the cross-sectional recrystallization area fraction and maximum recrystallization depth at the obtained deformation location are less than their corresponding recrystallization damage tolerance. If so, the detection result at the deformation location is safe; otherwise, the detection result at the deformation location is unsafe.

2. The method for detecting recrystallization of single-crystal high-temperature alloy blades according to claim 1, characterized in that, It also includes: providing safety warnings for deformation locations that are deemed unsafe by the test results, so as to prompt staff to carry out appropriate polishing or other post-processing work on the deformation location.

3. The method for detecting recrystallization of single-crystal high-temperature alloy blades according to claim 1, characterized in that, The construction of the single-crystal superalloy recrystallization database includes: Obtain circular or square specimens with fixed crystal planes by coarsely cutting a single crystal high-temperature alloy test bar along a direction perpendicular to <0 0 1>. Determine the compressive crystal orientation of the circular specimen or the compressive crystal plane of the square specimen. Perform an indentation test on the circular specimen along the compressive crystal orientation or perpendicular to the compressive crystal plane of the square specimen. After indentation, heat-treat the circular or square specimen and hold it at a preset temperature for a time before air cooling. Perform non-contact measurement on the indentation on the specimen surface to obtain the indentation parameters. The sample is cut along the <0 0 1> crystal direction at a preset distance from the center of the indentation, and the sample is ground and polished to the center of the indentation. The recrystallization parameters are statistically obtained. Obtain alloy parameters, shape parameters, and deformation parameters for round or square specimens; By establishing a one-to-one correspondence between indentation parameters, recrystallization parameters, alloy parameters, shape parameters, and deformation parameters, a single-crystal high-temperature alloy recrystallization database is obtained.

4. The method for detecting recrystallization of single-crystal high-temperature alloy blades according to claim 3, characterized in that, The indentation parameters include: indentation height, width, volume, and tilt angle. The recrystallization parameters include: cross-sectional recrystallization area fraction and maximum recrystallization depth, wherein the cross-sectional recrystallization area fraction TRF = S0 / S, where S0 is the area of ​​the recrystallization region of the cross-section and S is the total area of ​​the cross-section; The alloy parameters include: alloy type, chemical composition, heat treatment regime, physical, elastic and chemical properties, and mechanical properties of the single-crystal high-temperature alloy; The shape parameters include: the sample size of a circular or square sample; The deformation parameters include: the deformation crystal orientation or crystal plane parameters of the circular or square specimen.

5. The method for detecting recrystallization of single-crystal high-temperature alloy blades according to claim 1, characterized in that, The process of conducting creep tests under the same test conditions on single-crystal superalloy creep samples with different recrystallization area fractions and maximum recrystallization depths under preset conditions to obtain the recrystallization damage tolerance of the corresponding single-crystal superalloy and its corresponding blades under corresponding service conditions includes: The creep time T of the creep specimen at the preset creep rate is taken as the creep life of the circular or square creep specimen of single crystal superalloy containing recrystallization under the corresponding service conditions. Creep tests were conducted on circular or square creep specimens with different recrystallization area fractions and maximum recrystallization depths under the same test conditions. When the creep life is T, the corresponding cross-sectional recrystallization area fraction and maximum recrystallization depth represent the recrystallization damage tolerance of the single-crystal superalloy and its corresponding blades under the corresponding service conditions. The corresponding cross-sectional recrystallization area fraction is expressed as TRF. max The maximum recrystallization depth is expressed as DR. max .

6. The method for detecting recrystallization of single-crystal high-temperature alloy blades according to claim 4, characterized in that, The parameters for obtaining the coordinate information of the deformation location of the single-crystal superalloy blade to be detected include: Scan the non-service blades that have completed all production stages and do not contain recrystallization to obtain the three-dimensional coordinate information of the blades, and use the blades as standard blades; The coordinate information of the deformation location of the single crystal high-temperature alloy blade of the same model to be tested is scanned and compared with the standard blade to determine the corresponding deformation height, width, volume and tilt angle parameters of the deformation location. The temperature and stress fields of the single-crystal high-temperature alloy blade to be tested are analyzed to obtain the service temperature and stress range at the deformation location.

7. The method for detecting recrystallization of single-crystal high-temperature alloy blades according to claim 5, characterized in that, The determination of whether the cross-sectional recrystallization area fraction and maximum recrystallization depth at the deformation location are less than their corresponding recrystallization damage tolerance is considered. If so, the detection result at the deformation location is considered safe; otherwise, the detection result at the deformation location is considered unsafe, including: When the cross-sectional recrystallization area fraction and maximum recrystallization depth at the obtained deformation location are both less than the corresponding TRF under the same service conditions max and DR max If the test result corresponding to the deformation location is deemed safe, then the cross-sectional recrystallization area fraction and the maximum recrystallization depth at the deformation location are not less than the TRF under the same service conditions. max and DR max If the deformation location is not found, the detection result is considered unsafe.

8. A device for detecting recrystallization of single-crystal high-temperature alloy blades, characterized in that, include: The database construction module is used to build a database for recrystallization of single-crystal superalloys. The recrystallization damage tolerance acquisition module is used to conduct creep tests on single-crystal superalloy creep samples with different recrystallization area fractions and maximum recrystallization depths under preset conditions, and obtain the recrystallization damage tolerance of the corresponding single-crystal superalloy and its corresponding blades under the corresponding service conditions. The blade data acquisition module is used to acquire the coordinate information and corresponding parameters of the deformation location of the single crystal high temperature alloy blade to be tested, and input them into the single crystal high temperature alloy recrystallization database to obtain the cross-sectional recrystallization area fraction and maximum recrystallization depth of the single crystal high temperature alloy blade at the deformation location. The detection module is used to determine whether the cross-sectional recrystallization area fraction and maximum recrystallization depth at the obtained deformation location are less than their corresponding recrystallization damage tolerance. If they are, the detection result at the deformation location is safe; otherwise, the detection result at the deformation location is unsafe.

9. A computer device, characterized in that, include: The system includes a memory and a processor, which are interconnected. The memory stores computer instructions, and the processor executes the computer instructions to perform the single-crystal high-temperature alloy blade recrystallization detection method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to execute the single-crystal high-temperature alloy blade recrystallization detection method according to any one of claims 1-7.

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