Physical simulation method of internal deformation in forging process

Abstract

The present disclosure provides a method for simulating the internal deformation of a forging process, and relates to the field of forging technology. The method comprises: determining a test material corresponding to a forging blank to be simulated in a material library for additive manufacturing; performing additive manufacturing based on the test material to obtain a plurality of forging blank samples; forging each forging blank sample separately, and terminating the forging of each forging blank sample at a different time during the forging process; cutting each forging blank sample after forging to obtain a forging blank slice corresponding to each forging blank sample; collecting a cross-sectional image of each forging blank slice, and simulating the deformation of the forging blank to be simulated during the forging process based on the molten pool contour line and / or scanning trajectory line shown in the cross-sectional image. The present disclosure utilizes the forging blank sample obtained by additive manufacturing to replace the real forging blank for forging test, and can simulate the deformation occurring during the forging process by the change of the molten pool contour line and / or scanning trajectory line in the forging blank sample.

Description

Technical Field

[0001] The present disclosure relates to the field of forging technology, and in particular to a physical simulation method for internal deformation in a forging process. Background Art

[0002] Forging is a metalworking method that primarily produces plastic deformation. During the high-temperature forging process, the forging blank undergoes a large amount of plastic deformation, and its internal grain structure also changes.

[0003] In the related art, since the internal structure of the forging blank during the forging process is invisible, the deformation occurring inside the forging blank is difficult to be characterized, and therefore it is difficult to perform effective physical simulation of the forging process of the forging blank. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a method, device, electronic device and storage medium for physical simulation of internal deformation during a forging process.

[0005] According to a first aspect of an embodiment of the present disclosure, a method for simulating internal deformation during a forging process is provided, comprising:

[0006] Determining, in a material library for additive manufacturing, a test material corresponding to a forging blank to be simulated; wherein at least a portion of the metal composition in the test material is the same as that in the forging blank to be simulated;

[0007] Perform additive manufacturing based on the test material to obtain a plurality of forging blank specimens;

[0008] Forging each forging blank sample separately, and terminating the forging of each forging blank sample at different times during the forging process;

[0009] Cutting each forging blank sample after forging to obtain a forging blank slice corresponding to each forging blank sample;

[0010] A cross-sectional image of each forging blank slice is collected, and based on the molten pool contour line and / or the scanning trajectory line shown in the cross-sectional image, the deformation of the forging blank to be simulated during the forging process is simulated.

[0011] In some embodiments, each forging blank specimen includes a standard region and a defect region;

[0012] The additive manufacturing is performed based on the test material to obtain a plurality of forging blank specimens, including:

[0013] Based on the standard parameters corresponding to the test material, additively manufacturing is performed on the standard area of ​​each forging blank sample, and based on the defect parameters, additively manufacturing is performed on the defect area of ​​each forging blank sample to complete the preparation of each forging blank sample;

[0014] The defect parameter is obtained by performing at least one of the following processing on the standard parameter:

[0015] Increase or decrease the laser power in the standard parameters by more than 50%;

[0016] Increase the scan spacing from the standard parameters by more than 50%.

[0017] In some embodiments, each forging blank specimen includes a standard area and a positioning area;

[0018] The additive manufacturing is performed based on the test material to obtain a plurality of forging blank specimens, including:

[0019] Based on the standard parameters corresponding to the test material, additively manufacturing is performed on the standard area of ​​each forging blank sample, and based on the positioning parameters, additively manufacturing is performed on the positioning area of ​​each forging blank sample to complete the preparation of each forging blank sample;

[0020] The positioning parameters are obtained by performing at least one of the following processing on the standard parameters:

[0021] Increase or decrease the laser power in the standard parameters by 10% to 30%;

[0022] Increase or decrease the scanning interval in the standard parameters by 10% to 30%;

[0023] Increase or decrease the scan speed from the standard parameters by 10% to 30%.

[0024] In some embodiments, each forging blank specimen includes a standard area and a positioning area;

[0025] The additive manufacturing is performed based on the test material to obtain a plurality of forging blank specimens, including:

[0026] Based on the standard parameters corresponding to the test material, additive manufacturing is performed on each forging blank sample, and remelting scanning is performed on the positioning area in each forging blank sample to complete the preparation of each forging blank sample.

[0027] In some embodiments, forging each forging blank sample separately and terminating the forging of each forging blank sample at different times during the forging process includes:

[0028] Each forging blank sample is forged with multiple processes respectively, and during the forging process, at least one forging blank sample is terminated at the middle moment and the end moment of each process.

[0029] In some embodiments, after cutting each forging blank sample after forging to obtain a forging blank slice corresponding to each forging blank sample, the method further includes:

[0030] Grinding and polishing the cut sections of each forging blank slice;

[0031] Based on the corrosive agent corresponding to the test material, the cut cross-section of each forging blank slice after grinding and polishing is corroded.

[0032] In some embodiments, the size of each forging blank sample before forging is the same, and the shape of each forging blank sample before forging is the same as that of the forging blank to be simulated.

[0033] In some embodiments, the method further comprises:

[0034] Performing CT scanning on each forging blank sample or a forging blank slice of each forging blank sample after forging to obtain a CT scanning image corresponding to each forging blank sample;

[0035] Based on the CT scan image corresponding to each forging blank sample, the deformation of the forging blank to be simulated during the forging process is simulated.

[0036] In some embodiments, the method further comprises:

[0037] Performing thin-layer cutting on at least a portion of each forging blank sample after forging to obtain a thin slice corresponding to each forging blank sample;

[0038] Metallographic images of each thin slice are collected, and three-dimensional reconstruction of the at least partial region in each forging blank sample is performed based on the metallographic images, so as to simulate the deformation of internal grains of the at least partial region during the forging process.

[0039] In some embodiments, the additive manufacturing method is laser additive manufacturing or ion beam additive manufacturing.

[0040] The solution provided by the embodiment of the present disclosure can determine the test material corresponding to the forging blank to be simulated in the material library for additive manufacturing. Additive manufacturing is performed based on the test material, and a plurality of forging blank specimens can be obtained. Subsequently, each forging blank specimen can be forged separately, and during the forging process, the forging of each forging blank specimen can be terminated at a different time. The forging blank specimens after forging are cut to obtain forging blank slices corresponding to each forging blank specimen. Next, cross-sectional images of each forging blank slice can be collected, and based on the molten pool contour line and / or scanning trajectory line shown in the cross-sectional image, the deformation of the forging blank to be simulated during the forging process can be simulated. The embodiment of the present disclosure uses the forging blank specimen obtained by additive manufacturing to replace the real forging blank for forging test, and can simulate the deformation occurring during the forging process by the change of the molten pool contour line and / or scanning trajectory line in the forging blank specimen. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1A schematic flow chart of a method for simulating internal deformation in a forging process according to an embodiment of the present disclosure is shown.

[0042] Figure 2 A schematic diagram showing the molten pool outline of a forging sample in an embodiment of the present disclosure is shown.

[0043] Figure 3 A schematic diagram of the scanning trajectory of the forging sample in an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0044] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0045] Forging is a solid-state metal forming method that primarily achieves significant changes in metal shape through plastic deformation, ultimately producing a forged blank. During the high-temperature forging process, metal undergoes complex plastic deformation, with the core, surface, and even adjacent internal regions experiencing varying degrees of deformation and direction. Deformation can also vary at different times.

[0046] This uneven deformation will affect the grain structure changes inside the forging billet, the evolution of internal voids and crack defects, and affect the internal grain crushing and recrystallization, ultimately affecting the performance of the resulting forging.

[0047] However, since the interior of the metal forging blank is not visible and it is difficult to infer the internal deformation from its surface deformation, the plastic deformation of the forging blank during the forging process is difficult to characterize.

[0048] In order to solve the above technical problems, the embodiments of the present disclosure provide a physical simulation method for internal deformation in the forging process, which can use the forging blank specimen obtained by additive manufacturing to replace the real forging blank for forging test, and then simulate the deformation occurring in the forging process by changing the molten pool contour line and / or scanning trajectory line in the forging blank specimen.

[0049] This exemplary implementation will be described in detail below with reference to the accompanying drawings and examples.

[0050] First, an embodiment of the present disclosure provides a method for simulating internal deformation during a forging process.

[0051] Figure 1 A schematic diagram showing a process flow of a physical simulation method for internal deformation of a forging process according to an embodiment of the present disclosure is shown as follows: Figure 1As shown, the physical simulation method for internal deformation of a forging process provided in the embodiment of the present disclosure includes the following steps S101 to S105.

[0052] S101, determining a test material corresponding to a forging blank to be simulated in a material library for additive manufacturing.

[0053] It should be noted that the "forging blank to be simulated" in the embodiments of this disclosure is the actual forging blank used for forging. This disclosure aims to simulate the forging process of an actual forging blank by using forging blank specimens additively manufactured from test materials. However, the material of the actual forging blank may not necessarily be suitable for additive manufacturing.

[0054] Therefore, the test material corresponding to the forging blank to be simulated can be determined before preparing the forging blank specimen.

[0055] For example, if the material of the forging blank to be simulated exists in a material library for additive manufacturing, the material of the forging blank to be simulated can be directly used as the test material.

[0056] If the material of the forging blank to be simulated does not exist in the material library for additive manufacturing, a material having at least a partial metal composition identical to that of the forging blank to be simulated may be selected from the material library for additive manufacturing.

[0057] For example, the metal component with the highest content in the test material should be the same as that in the forging blank to be simulated, so that the forging blank specimen prepared from the test material has forging properties similar to those of the forging blank to be simulated.

[0058] S102, performing additive manufacturing based on the test material to obtain a plurality of forging blank specimens.

[0059] In some embodiments, the shape of each forging sample obtained by additive manufacturing is the same as that of the forging sample to be simulated, and although the size of each forging sample may be different from that of the forging sample to be simulated, the size of each forging sample is the same.

[0060] In other words, the forging specimens can be scaled proportionally from the forging to be simulated, ensuring they meet the dimensional requirements of both additive manufacturing and forging testing. By making each forging specimen the same size, subsequent comparisons of forging results can be facilitated to simulate the deformation process during forging.

[0061] In some embodiments, the additive manufacturing method can be laser additive manufacturing or ion beam additive manufacturing, which is not limited in the embodiments of the present disclosure.

[0062] S103, forging each forging blank sample separately, and terminating the forging of each forging blank sample at different times during the forging process.

[0063] In some embodiments, among the forging blank samples obtained by additive manufacturing, forging of at least one forging blank sample can be terminated immediately at the start of forging, that is, at least one forging blank sample is retained without forging, so as to show the initial appearance of the forging blank before forging when simulating the deformation of the real forging blank.

[0064] In some embodiments, by terminating the forging of each forging sample at a different time, each forging sample can be used to simulate a real forging sample in different forging states.

[0065] S104, cutting each forging blank sample after forging to obtain a forging blank slice corresponding to each forging blank sample.

[0066] In some embodiments, each forging blank sample may be cut by wire cutting so as to cut each forging blank sample into a plurality of forging blank slices, and the thickness of each forging blank slice may be the same or different.

[0067] In some embodiments, each forging blank sample may be cut according to a specified step length (eg, 1 mm to 20 mm), thereby obtaining a plurality of forging blank slices corresponding to each forging blank sample.

[0068] In some embodiments, each forging sample can be cut in at least one direction, with each forging sample being cut in the same direction. This allows for comparison of cutting results across the forging samples to simulate the forging deformation process. The cutting direction of the forging sample can be adaptively selected based on the additive manufacturing method, and can be a direction that facilitates viewing the molten pool and / or scanning trajectory within the forging sample.

[0069] S105 , collecting cross-sectional images of each forging blank slice, and simulating the deformation of the forging blank to be simulated during the forging process based on the molten pool contour line and / or the scanning trajectory line shown in the cross-sectional image.

[0070] In some embodiments, cross-sectional images of each forging blank slice may be collected using an optical metallographic microscope, a scanning electron microscope, or the like.

[0071] The melt pool is the pool-like area formed during the additive manufacturing process when the test material is heated to a molten state by a laser or ion beam and then cools. The melt pool contour is the contour of this area. The scanning trajectory is the trajectory formed by the laser or ion beam moving along a specific path during the additive manufacturing process.

[0072] For example, affected by the structure and cutting direction of the forging billet sample, the cross-sectional image of the same forging billet slice may show both the molten pool contour line and the scanning trajectory line, or may show only one of the two.

[0073] For example, for a forging specimen obtained by single-channel scanning, since the molten pool and the scanning trajectory are shown in two mutually perpendicular directions in the forging specimen, if the forging specimen is cut along the scanning trajectory direction in order to better capture the scanning trajectory line in the cross-sectional image, the forging slice obtained at this time will not be able to show the molten pool contour line. In order to simultaneously capture the molten pool contour line and the scanning trajectory line of such a forging specimen, the forging specimen can be cut along at least two directions in S104. One of the cutting directions can be selected in the scanning trajectory direction to obtain a forging slice for collecting the scanning trajectory line; the other cutting direction can be selected in a direction perpendicular to the scanning trajectory direction to obtain a forging slice for collecting the molten pool contour line. In this way, clear molten pool contour lines and scanning trajectory lines can be respectively captured from the slices obtained by cutting in different directions.

[0074] For another example, when the forging blank sample has a multi-layer structure and the scanning directions of each layer structure are different, the forging blank slices obtained by cutting along the scanning track direction or the molten pool cross section can simultaneously show the scanning track line and the molten pool contour line.

[0075] In some embodiments, in order to make the molten pool contour line and / or scanning trajectory line in the cross-section of the forging blank slice clearly appear, the cut cross-section of each forging blank slice can be ground and polished before collecting the cross-sectional image, and then the cut cross-section of each forging blank slice after the grinding and polishing treatment can be corroded based on the corrosive agent corresponding to the test material.

[0076] For example, the cut cross-sections of each forging blank slice can be ground and polished using sandpaper. The ground and polished forging blank slices are then etched in a chemical etchant for a specified period of time to reveal the sample's microstructure. The etching method can be either chemical or electrolytic. The etchant can be selected based on the test material and etching method, and this is not detailed in the present embodiment.

[0077] In some embodiments, by inputting the collected cross-sectional images into image processing software or a pre-trained neural network model, the molten pool contour line and scanning trajectory line in each cross-sectional image can be extracted.

[0078] In this way, the molten pool contour lines and scanning trajectory lines corresponding to each forging billet sample that terminates forging at different times can be obtained. These contour lines and trajectory lines can be used to characterize the deformation of the real forging billet at each moment during the forging process, thereby achieving the purpose of simulating the internal deformation of the forging process.

[0079] In addition, by comparing and analyzing the molten pool contour lines and scanning trajectory lines corresponding to each forging specimen, the dynamic process of forging deformation can also be simulated.

[0080] It is understandable that the molten pool contour line and the scanning trajectory line can be extracted simultaneously, or only one of them can be extracted, without affecting the implementation of the disclosed embodiment. In other words, as long as either the molten pool contour line or the scanning trajectory line is extracted, the purpose of simulating the internal deformation of the forging process can be achieved.

[0081] For example, please refer to Figure 2 , Figure 2 Schematic diagram of the molten pool outline of the forging sample in the embodiment of the present disclosure. Figure 2 In the figure, the cross-sectional image 1 on the left shows the molten pool contour line of the forging blank sample in the initial state, and the cross-sectional image 2 on the right shows the molten pool contour line of the forging blank sample after roughening. By comparing the two, the plastic deformation of the forging blank sample during the roughening process can be obtained.

[0082] For example, please refer to Figure 3 , Figure 3 Schematic diagram of the scanning trajectory of the forging sample in the embodiment of the present disclosure. Figure 3 In the figure, the cross-sectional image 3 on the left shows the scanning trajectory of the forging sample in the initial state, and the cross-sectional image 4 on the right shows the scanning trajectory of the forging sample after upsetting. By comparing the two, the plastic deformation of the forging sample during the upsetting process can also be obtained.

[0083] In some embodiments, the forging blank sample includes a standard region and a defect region, and the defect region in each forging blank sample is the same. By prefabricating defects (e.g., tiny holes) in the defect region, the evolution of defects in the forging blank during the forging process can be simulated.

[0084] For example, when preparing forging specimens by additive manufacturing technology, additive manufacturing can be performed on the standard area of ​​each forging specimen based on the standard parameters corresponding to the test material, and additive manufacturing can be performed on the defect area of ​​each forging specimen based on the defect parameters to complete the preparation of each forging specimen.

[0085] The standard parameters are determined by the type of test material and can be adjusted based on the shape and size of the forging specimen. They can be understood as the additive manufacturing parameters used to prepare the ideal forging specimen.

[0086] Exemplarily, the defect parameters may be obtained by performing at least one of the following processing on the standard parameters:

[0087] Increase or decrease the laser power in the standard parameters by more than 50%;

[0088] Increase the scan spacing in standard parameters by more than 50%.

[0089] It's understandable that during additive manufacturing, increasing laser power can cause molten metal to flow, while decreasing it can cause pilling. Increasing the scan spacing can prevent overlap between adjacent scan passes. Therefore, by adjusting the standard parameters as described above, defects such as tiny holes can be locally preformed.

[0090] In some embodiments, the forging specimen includes a standard region and a positioning region, with the positioning region being identical in each forging specimen. By causing the positioning region to produce a melt pool appearance and / or scanning trajectory that differs from the standard region, the region can be quickly located in a cross-sectional image of the forging slice. This region can serve as a location marker for locating the forging deformation study area under specific circumstances. These specific circumstances may include situations where the forging specimen is too large, there are a large number of melt pools and scanning trajectories, deformations generated during the forging process are significant, and other situations requiring positioning or zoning for study.

[0091] For example, when preparing forging specimens by additive manufacturing technology, additive manufacturing can be performed on the standard area of ​​each forging specimen based on the standard parameters corresponding to the test material, and additive manufacturing can be performed on the positioning area of ​​each forging specimen based on the positioning parameters to complete the preparation of each forging specimen.

[0092] The positioning parameters can be obtained by performing at least one of the following processing on the standard parameters:

[0093] Increase or decrease the laser power within the standard parameters by 10% to 30%;

[0094] Increase or decrease the scanning interval in the standard parameters by 10% to 30%;

[0095] Increase or decrease the scan speed in standard parameters by 10% to 30%.

[0096] It is understandable that by slightly adjusting at least one of the laser power, scanning spacing, and scanning speed, different morphologies of molten pool appearances and / or scanning trajectories can be formed locally in the prepared forging blank specimen.

[0097] For example, after additive manufacturing is performed on the forging blank sample based on the standard parameters corresponding to the test material, the positioning area in the forging blank sample may be remelted and scanned again to complete the preparation of the forging blank sample including the positioning area.

[0098] Whether using different parameters for additive manufacturing in different areas or performing remelting scanning on the positioning area, the purpose is to make the positioning area produce a different melt pool appearance and / or scanning trajectory from the standard area, so as to achieve the purpose of quickly distinguishing the positioning area.

[0099] In addition, the above-mentioned defect area and positioning area can be formed in the same forging sample to achieve their respective functions. In other words, the forging sample can also include a standard area, a defect area and a positioning area at the same time, which will not be described in detail in the embodiment of the present disclosure.

[0100] In some embodiments, in the above S103, each forging blank sample may be subjected to multiple forging processes respectively, and during the forging process, at least one forging blank sample is terminated at the middle moment and the end moment of each process.

[0101] Among them, the forging process can be roughing, drawing, bending, punching, etc. The intermediate moment of each forging process can be understood as any moment after the start and before the end of the process, and the end moment corresponds to the moment when the process is completed.

[0102] This setup allows the deformation effects of each forging process to be characterized using at least two forging specimens, including at least one intermediate state and one final state. The final state of the previous process can actually serve as the initial state for the next process. This allows for a relatively smooth simulation of the deformation process of the forging specimen during the forging process, and allows for independent analysis of the impact of each forging process on deformation.

[0103] In some embodiments, computed tomography (CT) scanning can be performed on each forging sample or a forging slice of each forging sample after forging to obtain a CT scan image corresponding to each forging sample. The deformation of the forging sample to be simulated during the forging process is then simulated based on the CT scan image corresponding to each forging sample.

[0104] That is, the CT technology can be used to analyze the structural heterogeneity in the forging specimen (or its slice), thereby determining the deformation of the forging specimen during the forging process.

[0105] In some embodiments, thin slices may be cut from at least a portion of each forging sample after forging to obtain thin slices corresponding to each forging sample. Metallographic images of each thin slice are then collected, and three-dimensional reconstruction of the at least portion of the region in each forging sample is performed based on the metallographic images to simulate the deformation of the internal grains of the at least portion of the region during the forging process.

[0106] For example, by thin-slicing the forging blank sample, several thin slices with a thickness of less than 0.2 mm can be obtained. These thin slices can be placed under a scanning electron microscope, and the electron backscatter diffraction (EBSD) technique can be used to collect metallographic images of each thin slice. The metallographic images collected by the EBSD technique can show the microscopic internal grain structure of each forging blank sample. Of course, the metallographic images of each thin slice can also be collected using an optical metallographic microscope, but this is not described in detail in the present embodiment.

[0107] For example, for the same forging blank sample, by importing the metallographic images of its various thin slices into the image analysis software, its internal grains can be reconstructed in three dimensions in order to analyze the deformation of its internal grains during the forging process, and thereby obtain the strain and displacement of its molten pool and internal grains during the forging process.

[0108] The above is an illustrative description of the implementation of the present disclosure. For ease of understanding, the implementation process of the present disclosure will be fully described below in conjunction with the following Example 1 and Example 2.

[0109] Example 1

[0110] Assuming that the forging blank to be simulated (real forging blank) is a low-alloy steel shaft forging blank made of CrNiMo, in order to simulate the deformation of the forging blank during the forging process, the following operations can be performed:

[0111] S1, 24CrNiMo alloy steel with a metal composition similar to that of the forging blank to be simulated and suitable for additive manufacturing was selected as the test material. Five cylindrical forging blank specimens with a size of φ40mm×40mm were prepared by laser selective melting technology.

[0112] S2. Long-axis forging is performed on the forging blank specimens using the same forging process as that used to process the forging blank to be simulated. The forging process can be divided into upsetting and drawing. Forging can be terminated for two of the forging blank specimens at the middle and end of the upsetting process, respectively, and forging can be terminated for the other two at the middle and end of the drawing process, respectively. One forging blank specimen is retained as an initial state reference and terminated at the start of forging.

[0113] S3: After the forging blank samples were cooled, they were cut along the same specified direction with a step length of 10 mm. The cut sections were polished and etched. The changes in the molten pool contour and scanning trajectory formed in additive manufacturing during the forging process were observed and measured using an optical metallographic microscope and a scanning electron microscope.

[0114] S4, by comparing the molten pool contour lines and scanning trajectory lines on the corresponding cutting sections of each forging specimen, the plastic strain distribution of the forging specimen in different forging processes can be calculated using relevant image analysis software, so as to simulate the deformation of the real forging specimen during the forging process.

[0115] Example 2

[0116] Assuming that the forging blank to be simulated (real forging blank) is made of 7050 aluminum alloy, in order to simulate the deformation of the forging blank during the forging process, the following operations can be performed:

[0117] S1. AlSi10Mg aluminum alloy with a similar metal composition to the forging blank to be simulated and suitable for additive manufacturing was selected as the test material. Six cubic forging blank specimens with a size of 40 mm × 40 mm × 40 mm were prepared using laser energy deposition technology.

[0118] S2. Perform multi-directional forging on the forging sample along the x, y, and z directions according to the same forging process as that used to process the forging sample to be simulated. For forging in each direction, forging of one forging sample may be terminated at an intermediate point before the end of forging in that direction, while forging of another forging sample may be terminated at the end of forging in that direction.

[0119] S3: After the forging blank samples were cooled, they were cut along the same specified direction with a step length of 10 mm. The cut sections were polished and etched. The changes in the molten pool contour and scanning trajectory formed in additive manufacturing during the forging process were observed and measured using an optical metallographic microscope and a scanning electron microscope.

[0120] S4, by comparing the molten pool contour lines and scanning trajectory lines on the corresponding cutting sections of each forging specimen, the plastic strain distribution of the forging specimen in different forging processes can be calculated using relevant image analysis software, so as to simulate the deformation of the real forging specimen during the forging process.

[0121] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A physical simulation method for internal deformation during forging process, characterized in that: include: Determining, in a material library for additive manufacturing, a test material corresponding to a forging blank to be simulated; wherein at least a portion of the metal composition in the test material is the same as that in the forging blank to be simulated; Perform additive manufacturing based on the test material to obtain a plurality of forging blank specimens; Forging each forging blank sample separately, and terminating the forging of each forging blank sample at different times during the forging process; Cutting each forging blank sample after forging to obtain a forging blank slice corresponding to each forging blank sample; A cross-sectional image of each forging blank slice is collected, and based on the molten pool contour line and / or the scanning trajectory line shown in the cross-sectional image, the deformation of the forging blank to be simulated during the forging process is simulated.

2. The method according to claim 1, characterized in that Each forging blank specimen includes a standard area and a defect area; The additive manufacturing is performed based on the test material to obtain a plurality of forging blank specimens, including: Based on the standard parameters corresponding to the test material, additively manufacturing is performed on the standard area of ​​each forging blank sample, and based on the defect parameters, additively manufacturing is performed on the defect area of ​​each forging blank sample to complete the preparation of each forging blank sample; The defect parameter is obtained by performing at least one of the following processing on the standard parameter: Increase or decrease the laser power in the standard parameters by more than 50%; Increase the scan spacing from the standard parameters by more than 50%.

3. The method according to claim 1, characterized in that Each forging blank specimen includes a standard area and a positioning area; The additive manufacturing is performed based on the test material to obtain a plurality of forging blank specimens, including: Based on the standard parameters corresponding to the test material, additively manufacturing is performed on the standard area of ​​each forging blank sample, and based on the positioning parameters, additively manufacturing is performed on the positioning area of ​​each forging blank sample to complete the preparation of each forging blank sample; The positioning parameters are obtained by performing at least one of the following processing on the standard parameters: Increase or decrease the laser power in the standard parameters by 10% to 30%; Increase or decrease the scanning interval in the standard parameters by 10% to 30%; Increase or decrease the scan speed from the standard parameters by 10% to 30%.

4. The method according to claim 1, wherein Each forging blank specimen includes a standard area and a positioning area; The additive manufacturing is performed based on the test material to obtain a plurality of forging blank specimens, including: Based on the standard parameters corresponding to the test material, additive manufacturing is performed on each forging blank sample, and remelting scanning is performed on the positioning area in each forging blank sample to complete the preparation of each forging blank sample.

5. The method according to any one of claims 1 to 4, characterized in that The forging of each forging blank sample is performed separately, and during the forging process, the forging of each forging blank sample is terminated at a different time, including: Each forging blank sample is forged with multiple processes respectively, and during the forging process, at least one forging blank sample is terminated at the middle moment and the end moment of each process.

6. The method according to any one of claims 1 to 4, characterized in that After cutting each forging blank sample after forging to obtain a forging blank slice corresponding to each forging blank sample, the method further includes: Grinding and polishing the cut sections of each forging blank slice; Based on the corrosive agent corresponding to the test material, the cut cross-section of each forging blank slice after grinding and polishing is corroded.

7. The method according to any one of claims 1 to 4, characterized in that The size of each forging blank sample before forging is the same, and the shape of each forging blank sample before forging is the same as that of the forging blank to be simulated.

8. The method according to any one of claims 1 to 4, characterized in that The method further comprises: Performing CT scanning on each forging blank sample or a forging blank slice of each forging blank sample after forging to obtain a CT scanning image corresponding to each forging blank sample; Based on the CT scan image corresponding to each forging blank sample, the deformation of the forging blank to be simulated during the forging process is simulated.

9. The method according to any one of claims 1 to 4, characterized in that The method further comprises: Performing thin-layer cutting on at least a portion of each forging blank sample after forging to obtain a thin slice corresponding to each forging blank sample; Metallographic images of each thin slice are collected, and three-dimensional reconstruction of the at least partial region in each forging blank sample is performed based on the metallographic images, so as to simulate the deformation of internal grains of the at least partial region during the forging process.

10. The method according to any one of claims 1 to 4, characterized in that The additive manufacturing method is laser additive manufacturing or ion beam additive manufacturing.

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