High-throughput preparation and analysis method of metal material and metal piece

Abstract

The invention provides a high-throughput preparation and analysis method of a metal material and a metal piece, and relates to the technical field of metal material preparation, and the high-throughput preparation and analysis method comprises the following steps: step 1) preparing a processing area on the metal piece through stirring friction processing treatment; the machining area comprises a plurality of machining area sections; the machining parameter ranges corresponding to the machining sections are different; 2) representing the plurality of processing sections, and establishing a constitutive relation model between processing parameters and performance; according to the method, machining areas of different tissues can be obtained at a time through high throughput, and compared with a traditional mode of testing control variables one by one, one-time machining can cover multiple parameter combinations, so that the number of times of tests and the trial and error time are reduced, the tissue optimization efficiency of materials is improved, and the research and development cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal material preparation, and in particular relates to a high-throughput preparation and analysis method of metal materials and a metal part. Background Art

[0002] The preparation of metal materials is one of the most critical links in modern industrial production and is widely used in aerospace, automobiles, ships, construction and other fields. The preparation process includes multiple steps such as smelting, casting, homogenization, rolling, heat treatment, etc., and the production process is usually lengthy and complicated. Since metal materials usually contain a variety of chemical elements, these elements may be burned and segregated during the processing process, resulting in uneven composition, which in turn affects the performance of the material. In addition, the formation of grains, the development of textures, and the presence of impurity phases and precipitated phases all have a significant impact on the final microstructure and macroscopic properties of the material. In order to obtain metal materials with excellent performance, existing technologies usually require controlling various factors one by one. Although this "control variable method" has a scientific basis, it is inefficient, time-consuming, labor-intensive, and costly.

[0003] Traditional methods of optimizing material organization, such as annealing, quenching, and plastic deformation, usually require multiple experimental verifications and gradual adjustment of material preparation parameters to optimize the ideal organizational structure. This method is more time-consuming for complex metal materials and cannot quickly respond to the demand for high-performance materials in industrial applications. With the advancement of science and technology, new material preparation methods have been gradually applied, among which Friction Stir Processing (FSP) has become one of the hot technologies in material science research and industrial applications because it can effectively and finely control the material organization.

[0004] However, although friction stir processing can optimize the material structure by adjusting the welding parameters, in practical applications, the parameter optimization process is very cumbersome and complicated. Usually, the selection range of welding parameters is large, including rotation speed, travel speed, down force, etc., and the material structure and performance are very sensitive to the changes in these parameters. For example, in order to obtain the best material properties, researchers need to gradually adjust the rotation speed and travel speed, such as gradually reducing the rotation speed from 2000rpm to 500rpm, and the travel speed from 2000mm / min to 500mm / min. Assuming that the step size of each adjustment is 100, the combination of these two parameters alone requires 256 processing tests. For some metal materials that are sensitive to heat input, the step size of parameter adjustment may be smaller, even reaching a reduction of 50 or 10 each time, which will lead to a significant increase in the number of experiments, requiring 961 or 22801 processing experiments respectively. Such a cumbersome parameter optimization process greatly increases the investment of time and cost, making the industrial application of friction stir processing face huge challenges.

[0005] In view of this, it is necessary to provide a method for optimizing the structure of metal materials. Summary of the invention

[0006] Therefore, the present invention provides a high-throughput preparation and analysis method of metal materials and metal parts, the main purpose of which is to improve the efficiency of metal material organization optimization.

[0007] In order to solve the above problems, the present invention provides a high-throughput preparation and analysis method of metal materials, comprising the following steps:

[0008] Step 1) preparing a processing area on the metal material part by friction stir processing; the processing area includes a plurality of processing sections; each processing section corresponds to a different processing parameter range;

[0009] Step 2) characterizing the plurality of processing sections and establishing a constitutive relationship model between processing parameters and performance.

[0010] Furthermore, the processing area is divided into n equally divided areas, each of which corresponds to a processing section; wherein n is an integer greater than 1.

[0011] Furthermore, in the step 1), the processing area is prepared by friction stir processing with the travel speed being constant and the rotation speed being gradually reduced;

[0012] Preferably, the travel speed is 50-500 mm / min, the initial rotation speed is 2000-3000 r / min, and the rotation speed at the end of the friction stir processing is 200-500 r / min; further preferably, the acceleration of the rotation speed is 100-1500 r / min 2 .

[0013] Furthermore, in the step 1), the processing area is prepared by friction stir processing with a constant rotation speed and a gradually increasing travel speed;

[0014] Preferably, when the rotation speed is constant and the travel speed is gradually increased: the rotation speed is 1000-2000r / min, the initial travel speed is 50-100mm / min, and the travel speed at the end of the stir friction processing is 1100-2000mm / min; further preferably, the acceleration of the travel speed is 50-1200mm / min 2 .

[0015] Further, in the step 1):

[0016] A stirring tool is used to prepare a processing area on a metal material piece;

[0017] Preferably, the metal material piece is a plate; the thickness of the plate is greater than the depth of the processing area; further preferably, the thickness of the processing area is 1-4 mm;

[0018] Preferably, the stirring tool comprises a shaft shoulder and a stirring needle;

[0019] Preferably, the diameter of the shoulder is 3-5 times the thickness of the plate; the stirring needle is a three-plane conical thread needle, and the root diameter of the stirring needle is 0.8-1.2 times the thickness of the plate.

[0020] Furthermore, the material used for the metal material piece is one of aluminum alloy, magnesium alloy, aluminum-based / magnesium-based composite material, steel, and titanium alloy;

[0021] Preferably, when the material used for the metal material piece is aluminum alloy or magnesium alloy, the material used for the friction stir processing tool is H13 steel;

[0022] Preferably, when the material used for the metal material piece is an aluminum-based / magnesium-based composite material, the material used for the tool for the friction stir processing is a cemented carbide;

[0023] Preferably, when the material used for the metal material piece is steel or titanium alloy, the material used for the tool for the friction stir processing is tungsten-rhenium alloy.

[0024] Furthermore, in step 2), the step of characterizing the plurality of processing sections comprises:

[0025] Performing performance tests on a plurality of the processing sections;

[0026] Preferably, the step of characterizing the plurality of processing sections also includes: performing tissue analysis on the plurality of processing sections to obtain the corresponding relationship between each processing parameter and the tissue; further preferably, the step of performing tissue analysis on the plurality of processing sections includes: performing grain size or precipitation phase analysis in the plurality of processing sections.

[0027] Furthermore, the step of performing tissue analysis on the plurality of processing sections comprises:

[0028] Conducting tests on tensile strength, toughness and corrosion resistance in a plurality of the processing sections;

[0029] Preferably, the speed ω(l x ), travel speed The constitutive relationship model between the tensile strength and the

[0030]

[0031] Preferably, the speed ω(l x ), travel speed and elongation (y elongation ) is:

[0032]

[0033] Preferably, the speed ω(l x ), travel speed The weight loss from intergranular corrosion (y Weight loss ) is:

[0034]

[0035] Among them, μ is the friction coefficient; P is the pressure between the shoulder and the workpiece, in N; R is the diameter of the shoulder, in mm; lx is the length of the processing area, in mm; ω is the rotation speed, which is a function related to the length of the processing area (lx), in r / min; It is the travel speed (i.e. processing speed), which is a function related to the length (lx) of the processing area and its unit is mm / min.

[0036] In another aspect, the present invention provides a friction stir processing method for a metal material, comprising the following steps:

[0037] Step 1) determining the processing parameters of the metal part; wherein the processing parameters are screened by any of the high-throughput preparation and analysis methods described above;

[0038] Step 2) The metal part is subjected to friction stir processing using the processing parameters to obtain a metal part with optimized structure.

[0039] On the other hand, the present invention provides a metal part, wherein the metal part is a metal part with optimized structure, wherein the metal part with optimized structure is obtained by the stir friction processing method described above.

[0040] The metal material and the method for optimizing its structure provided by the present invention have the following beneficial effects:

[0041] 1. The present invention provides a high-throughput preparation and analysis method for metal materials, comprising the following steps: step 1) preparing a processing area on a metal material piece by stir friction processing; the processing area includes multiple processing sections; each processing section corresponds to a different range of processing parameters; step 2) characterizing the multiple processing sections to establish a relationship between processing parameters and organization, and a constitutive relationship model between processing parameters and performance; Regarding the above steps, it should be noted that: processing areas with different organizations can be obtained at one time through high throughput. Compared with the traditional method of controlling variables one by one, one processing can cover multiple parameter combinations, reducing the number of experiments and trial and error time, improving the efficiency of material organization optimization, and reducing R&D costs; at the same time, combined with high-throughput characterization technology, the relationship between processing parameters and organization, and between processing parameters and performance can be quickly established, which is conducive to the rapid screening of processing parameters that optimize material organization and performance.

[0042] 2. Furthermore, the present invention sets multiple sets of different processing parameters based on friction stir processing to obtain processing areas with different structures. The specific processing parameters include: the travel speed remains unchanged and the rotation speed gradually decreases; or the rotation speed remains unchanged and the travel speed gradually increases; to screen out the rotation speed and travel speed that can optimize the material structure and performance; through the screened rotation speed and travel speed, a large area of ​​metal parts are subjected to friction stir processing to obtain metal parts with optimized structure. Among them, when the travel speed remains unchanged, the range is selected to be 50-500mm / min, which can ensure that the rotation speed has a good processing and forming effect when it is linearly / nonlinearly adjusted within a larger range; when the rotation speed remains unchanged, the range is selected to be 2000-3000r / min, which can ensure that the welding speed has a good processing and forming effect when it is linearly / nonlinearly adjusted within a larger range.

[0043] 3. Furthermore, the present invention is also applicable to parameter optimization during friction stir welding, and defect-free high-performance welding parameters can be quickly screened by linearly or nonlinearly adjusting the rotation speed and / or travel speed.

[0044] 4. On the other hand, the present invention provides a metal part, which is a metal part optimized by the above-mentioned organization optimization method. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0046] Figure 1Schematic diagram of parameters of the friction stir processing in the present invention and the conventional friction stir processing; wherein (a) is a gradual increase in the travel speed, and (b) is a gradual increase in the rotation speed;

[0047] Figure 2 is a microscopic image of the processing area in Example 1 of the present invention;

[0048] Figure 3 1 is a graph showing the corresponding relationship between the processing parameters and the structure and performance in Example 1 of the present invention; wherein: (a) is the nondestructive testing morphology, (b) the processing parameters and the grain size, (c) the processing parameters and the tensile strength, and (d) the processing parameters and the corrosion depth;

[0049] Figure 4 It is the organization and performance of the metal part after organization optimization in Example 1 of the present invention; wherein: (a) is the macroscopic morphology after processing, (b) is the comparison of tensile properties before and after processing, (c) to (e) are the morphologies after corrosion after processing, and (f) to (h) are the corrosion morphologies before processing.

[0050] Figure 5 It is the macroscopic morphology and tensile properties of the processing area in the comparative example of the present invention; wherein the corresponding rotation speed-travel speed parameters are: (a) 600rpm-100mm / min, (b) 600rpm-150mm / min, (c) 600rpm-200mm / min, (d) 800rpm-100mm / min, (e) 800rpm-150mm / min, (f) 800rpm-200mm / min; (g) is the corresponding tensile property test result. DETAILED DESCRIPTION

[0051] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0052] The present invention provides a high-throughput preparation and analysis method for a metal material, comprising the following steps:

[0053] Step 1) preparing a processing area on the metal material part by friction stir processing; the processing area includes a plurality of processing sections; each processing section corresponds to a different processing parameter range;

[0054] Step 2) Characterize multiple processing sections to establish a constitutive relationship model between processing parameters and performance.

[0055] In step 1), a processing area is prepared by friction stir processing with a constant travel speed and a gradually reduced rotation speed; and / or

[0056] A processing zone is prepared by friction stir processing with a constant rotation speed and gradually increasing travel speed;

[0057] The processing area is divided into n equal areas, each of which corresponds to a processing section; wherein n is an integer greater than 1.

[0058] When the travel speed remains unchanged and the rotation speed gradually decreases: the travel speed is 50-500mm / min, the initial rotation speed is 2000-3000r / min, and the rotation speed at the end of the stir friction processing is 200-500r / min; wherein the rotation speed is linearly / nonlinearly adjusted; preferably, the acceleration of the rotation speed during linear adjustment is 100-1500r / min 2 ;

[0059] When the rotation speed is constant and the travel speed gradually increases: the rotation speed is 1000-2000r / min, the initial travel speed is 50-100mm / min, and the travel speed at the end of the stir friction processing is 1100-2000mm / min; wherein the travel speed is linearly / nonlinearly adjusted; preferably, when linearly adjusted, the acceleration of the travel speed is 50-1200mm / min 2 .

[0060] Based on the above method, processing areas with different tissues can be obtained at one time through high throughput. Compared with the traditional method of controlling variables one by one, one processing can cover multiple parameter combinations, reducing the number of experiments and trial and error time, improving the efficiency of material tissue optimization, and reducing R&D costs; at the same time, combined with high-throughput characterization technology, the relationship between processing parameters, material organization and performance can be quickly established, which is conducive to the rapid screening of processing parameters that optimize material organization and performance.

[0061] During the friction stir processing, the heat input is changed by controlling the gradual adjustment of welding parameters (such as rotation speed and travel speed) to form a material with a gradual microstructure. In the same processing path, the rotation speed is gradually reduced from a high speed (such as 2000rpm) to a low speed (such as 100rpm), or the welding speed is gradually increased from a low welding speed (such as 100mm / min) to a high welding speed (such as 2000mm / min), so as to achieve multi-dimensional optimization between parameters and microstructure. The microstructure generated by parameter gradient can more comprehensively reflect the performance changes of the material, and the optimization effect is more systematic.

[0062] Further, in step 1):

[0063] A stirring tool is used to prepare a processing area on a metal material piece;

[0064] Preferably, the metal material piece is a plate; the thickness of the plate is greater than the depth of the processing zone; further preferably, the thickness of the processing zone is 1-4 mm;

[0065] Preferably, the stirring tool includes a shaft shoulder and a stirring needle; the above-mentioned travel speed refers to the travel speed (and processing speed) of the stirring tool during processing; the above-mentioned rotation speed refers to the rotation speed of the stirring tool during processing; when the differential stirring friction type is adopted, the above-mentioned rotation speed can be the rotation speed of the stirring needle or the rotation speed of the shaft shoulder;

[0066] Preferably, the diameter of the shoulder is 3-5 times the thickness of the plate; the stirring needle is a three-plane conical threaded needle, and the root diameter of the stirring needle is 0.8-1.2 times the thickness of the plate; wherein, before the step of performing stir friction processing on the metal material part, it also includes: surface treatment of the metal material part.

[0067] Furthermore, the material used for the metal material part is one of aluminum alloy, magnesium alloy, aluminum-based / magnesium-based composite material, steel, and titanium alloy;

[0068] Preferably, when the material used for the metal material piece is aluminum alloy or magnesium alloy, the material used for the friction stir processing tool is H13 steel;

[0069] Preferably, when the material used for the metal material piece is an aluminum-based / magnesium-based composite material, the material used for the friction stir processing tool is a cemented carbide;

[0070] Preferably, when the material used for the metal material piece is steel or titanium alloy, the material used for the tool for the friction stir processing is tungsten-rhenium alloy.

[0071] Further, in step 2), the step of characterizing the plurality of processing sections comprises:

[0072] Performance testing of multiple processing sections.

[0073] Further, the step of performing organizational analysis on multiple processing sections includes:

[0074] Grain size or precipitation phase analysis is performed in multiple processing sections.

[0075] Further, the steps of performing performance tests on the plurality of processing sections include:

[0076] Conduct tensile strength, toughness, and corrosion resistance tests in multiple processing sections;

[0077] The speed ω(l x ), travel speed The constitutive relationship model between the tensile strength and the

[0078]

[0079] The speed ω(l x ), travel speed and elongation (y elongation ) is:

[0080]

[0081] The speed ω(l x ), travel speed The weight loss from intergranular corrosion (y Weight loss ) is:

[0082]

[0083] Among them, μ is the friction coefficient; P is the pressure between the shoulder and the workpiece, in N; R is the diameter of the shoulder, in mm; lx is the length of the processing area, in mm; ω is the rotation speed, which is a function related to the length of the processing area (lx), in r / min; It is the travel speed (i.e. processing speed), which is a function related to the length (lx) of the processing area and its unit is mm / min.

[0084] The average performance in the interval l1 to l2 is:

[0085]

[0086] Since the travel speed or rotation speed changes gradually during processing, the performance of different areas (such as tensile strength) varies greatly. Therefore, more appropriate processing parameters can be selected by calculating the average performance.

[0087] In addition, the heat source strength test can be carried out on multiple processing sections to obtain the speed ω(l x ), travel speed The constitutive relationship model between the heat source intensity q(lx) is:

[0088]

[0089] The heat source intensity is the heat input during the friction stir processing, which is obtained by obtaining the rotation speed ω(l x ), travel speed The constitutive relationship model between the heat source intensity q(lx) is used to control the heat input of friction stir processing, so that the microstructure and properties of the processing area can be adjusted through heat input.

[0090] Based on the above method, it is not only applicable to lightweight metal materials such as aluminum and magnesium, but also can be used for other metal alloys and composite materials that are sensitive to heat input. This wide applicability allows the technology to be expanded to the research and development of a variety of materials.

[0091] In another aspect, the present invention provides a friction stir processing method for a metal material, comprising the following steps:

[0092] Step 1) determining the processing parameters of the metal part; wherein the processing parameters are obtained by screening any of the high-throughput preparation and analysis methods described above;

[0093] Step 2) The metal part is subjected to friction stir processing using processing parameters to obtain a metal part with optimized structure.

[0094] On the other hand, the present invention provides a metal part, which is a metal part with optimized structure, wherein the metal part with optimized structure is obtained by the above-mentioned stir friction processing method.

[0095] The present invention is further described below with reference to specific embodiments and comparative examples.

[0096] Example 1

[0097] This embodiment provides a high-throughput preparation and analysis method for metal materials, comprising the following steps:

[0098] Step 1) performing friction stir processing on the metal material to form a processing area on the metal material; wherein the processing area is divided into n equal areas, each of which corresponds to a processing section; and each processing section corresponds to a different processing parameter range;

[0099] Among them, the metal material part uses a 3mm thick 5383 aluminum alloy plate, which is rigidly fixed on the workbench. The shoulder diameter of the stirring tool is 12mm, the root diameter of the stirring needle is 4mm, the needle length is 1.7mm, the downward pressure is 0.2mm, the initial speed of the stirring tool is 1000r / min, and the speed is gradually reduced in a linear manner during the processing. The processing length is 400mm, the terminal speed is 200r / min, and the travel speed is 50mm / min;

[0100] Step 2) performing organization analysis on multiple processing sections to obtain the corresponding relationship between each processing parameter and the organization; performing performance testing on multiple processing sections to obtain the corresponding relationship between each processing parameter and the performance; and then establishing a constitutive relationship model between the processing parameters and the performance;

[0101] The tensile strength, toughness and corrosion resistance were tested in multiple processing sections, and the following constitutive relationship model was obtained:

[0102] Speed ​​ω(l x), travel speed The constitutive relationship model between the tensile strength and the

[0103]

[0104] Speed ​​ω(l x ), travel speed and elongation (y elongation ) is:

[0105]

[0106] Speed ​​ω(l x ), travel speed The weight loss from intergranular corrosion (y Weight loss ) is:

[0107]

[0108] Among them, μ is the friction coefficient; P is the pressure between the shoulder and the workpiece, in N; R is the diameter of the shoulder, in mm; lx is the length of the processing area, in mm; ω is the rotation speed, which is a function related to the length of the processing area (lx), in r / min; It is the travel speed (i.e. processing speed), which is a function related to the length (lx) of the processing area and its unit is mm / min.

[0109] Specifically, the above processing area is subjected to organizational analysis, and through non-destructive testing, there are no defects in the processing area, such as Figure 3 The entire processing area is polished and polished, as shown in a. Figure 2 As shown in the figure, hardness test is performed on the surface of the processing area every 5 mm. The tensile strength of the material is usually 3 times the microhardness. The strength data calculated by the hardness value is as follows Figure 3 As shown in c, it can be seen that as the speed decreases, the strength gradually increases. The intergranular corrosion test was carried out on the entire processing area, and then the cross section of the processing area was cast aside and the intergranular corrosion depth was observed at the polished surface. The test results are shown in Figure 3 As shown in Figure d, it can be seen that with the decrease of rotation speed, the depth of intergranular corrosion gradually decreases.

[0110] The corresponding relationship between processing parameters and grain size is as follows: Figure 3 As shown in b, as the rotation speed decreases to 300 rpm, the grain size changes suddenly to about 1 micron. At this time, the material usually has a good matching of strength and plasticity.

[0111] According to the above analysis method, the corresponding relationship between processing parameters and organization, as well as the corresponding relationship between processing parameters and performance, the processing parameters (travel speed of 50mm / min, rotation speed of 300r / min) are selected to perform large-area friction stir processing on the metal parts to obtain the metal parts with optimized organization, such as Figure 4 As shown in the figure, the metal parts and the metal material parts are made of the same material. After multiple processing, the tensile strength of the base material is increased from 356MPa to 400MPa, the elongation is increased from 14% to 19%, and the corrosion weight loss is increased from 54.2mg / cm 2 Reduced to 8.3 mg / cm 2 , all the performances of the materials have been significantly improved.

[0112] Example 2

[0113] This embodiment provides a high-throughput preparation and analysis method for metal materials, comprising the following steps:

[0114] Step 1) performing friction stir processing on the metal material to form a processing area on the metal material; wherein the processing area is divided into n equal areas, each of which corresponds to a processing section; and each processing section corresponds to a different processing parameter range;

[0115] Among them, the metal material part uses 3mm thick AZ31 magnesium alloy as the metal material part, the plate is rigidly fixed on the workbench, the processing tool shoulder diameter is 12mm, the root diameter of the stirring needle is 4mm, the needle length is 1.7mm, the downward pressure is 0.2mm, the initial speed of the stirring tool is 2000r / min, and the speed is gradually reduced in a linear manner during the processing. The welding length is 400mm, the terminal speed is 1000r / min, and the travel speed is 100mm / min;

[0116] Step 2) performing organization analysis on multiple processing sections to obtain the corresponding relationship between each processing parameter and the organization; performing performance testing on multiple processing sections to obtain the corresponding relationship between each processing parameter and the performance; and then establishing a constitutive relationship model between the processing parameters and the performance;

[0117] According to the above analysis method, the corresponding relationship between processing parameters and structure, as well as the corresponding relationship between processing parameters and performance are obtained, and processing parameters are selected to perform large-area friction stir processing on metal parts to obtain metal parts with optimized structure; wherein the metal parts and the metal material parts are made of the same material.

[0118] Example 3

[0119] This embodiment provides a high-throughput preparation and analysis method for metal materials, comprising the following steps:

[0120] Step 1) performing friction stir processing on the metal material to form a processing area on the metal material; wherein the processing area is divided into n equal areas, each of which corresponds to a processing section; and each processing section corresponds to a different processing parameter range;

[0121] Among them, the metal material part uses 3mm thick 2219 aluminum alloy as the metal material part, the plate is rigidly fixed on the workbench, the welding tool shoulder diameter is 12mm, the root diameter of the stirring needle is 4mm, the needle length is 1.7mm, the downward pressure is 0.2mm, the initial speed of the stirring tool is 2000r / min, and the speed is gradually reduced in a linear manner during the welding process. The welding length is 400mm, the terminal speed is 600r / min, and the travel speed is 100mm / min;

[0122] Step 2) Perform high-throughput microstructure analysis on the 1 / n equally divided points of the weld to obtain the corresponding relationship between each parameter and the s-line, root weak bond and processing area microstructure; perform high-throughput performance testing on the 1 / n equally divided points of the weld to obtain the corresponding relationship between each welding parameter and performance; and quickly screen the influence of welding parameters on weld microstructure and performance.

[0123] Example 4

[0124] The embodiment provides a high-throughput preparation and analysis method of a metal material, comprising the following steps:

[0125] Step 1) performing friction stir processing on the metal material to form a processing area on the metal material; wherein the processing area is divided into n equal areas, each of which corresponds to a processing section; and each processing section corresponds to a different processing parameter range;

[0126] Among them, the metal material part uses 6mm thick 2219 aluminum alloy as the metal material part, the plate is rigidly fixed on the workbench, the welding tool shoulder diameter is 18mm, the root diameter of the stirring needle is 6.5mm, the needle length is 5.8mm, the upper and lower shoulders are pressed down by 0.1mm, the rotation speed is 600r / min, the initial travel speed of the stirring tool is 50mm / min, the travel speed gradually increases linearly during the welding process, the terminal travel speed is 500mm / min, and the welding length is 400mm;

[0127] Step 2) Perform high-throughput microstructure analysis on the 1 / n equally divided points of the weld to obtain the corresponding relationship between each parameter and the s-line, root weak bond and processing area microstructure; perform high-throughput performance testing on the 1 / n equally divided points of the weld to obtain the corresponding relationship between the travel speed and the performance; and quickly screen the influence of the travel speed on the microstructure and performance of the weld.

[0128] Example 5

[0129] This embodiment provides a high-throughput preparation and analysis method for metal materials, comprising the following steps:

[0130] Step 1) performing friction stir processing on the metal material to form a processing area on the metal material; wherein the processing area is divided into n equal areas, each of which corresponds to a processing section; and each processing section corresponds to a different processing parameter range;

[0131] Among them, the metal material part uses 10mm thick 7075 aluminum alloy as the metal material part, the plate is rigidly fixed on the workbench, the welding tool shoulder diameter is 30mm, the root diameter of the stirring needle is 12mm, the needle length is 9.7mm, the downward pressure is 0.2mm, the shoulder speed is 200r / min, the initial speed of the stirring needle is 2000r / min, and the speed is gradually reduced in a linear manner during the welding process. The welding length is 400mm, the terminal speed is 400r / min, and the travel speed is 200mm / min;

[0132] Step 2) Perform high-throughput microstructure analysis on the 1 / n equally divided points of the weld to obtain the corresponding relationship between each parameter and the s-line, root weak bond and processing area microstructure; perform high-throughput performance testing on the 1 / n equally divided points of the weld to obtain the corresponding relationship between each welding parameter and performance; and quickly screen the influence of welding parameters on weld microstructure and performance.

[0133] Comparative Example

[0134] The metal material is a 3mm thick 5383 aluminum alloy plate, which is rigidly fixed on the workbench. The shoulder diameter of the stirring tool is 12mm, the root diameter of the stirring needle is 4mm, the needle length is 1.7mm, and the downward pressure is 0.2mm. The friction stir processing is carried out according to the following processing parameters of rotation speed and travel speed: 600rpm-100mm / min, 600rpm-150mm / min, 600rpm-200mm / min, 800rpm-100mm / min, 800rpm-150mm / min, 800rpm-200mm / min. The morphology and tensile properties test results of the processing area after processing are shown in the figure. Figure 5 As shown, it can be seen that defect-free processing areas are obtained through the above processing parameters, but the strength of the processing area is low, less than 350MPa. It can be found that the travel speed adjustment step is 50, the rotation speed adjustment step is 200, and 6 trials and errors are required to adjust only 2 rotation speeds and 3 travel speeds. The conventional parameter exploration process requires a large number of parameter exploration experiments, the experimental process is long, and the large parameter adjustment step leads to inaccurate exploration of key parameters, making it difficult to explore the best welding process.

[0135] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0136] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A high-throughput preparation and analysis method for metal materials, characterized in that: The following steps are involved: Step 1) preparing a processing area on the metal material part by friction stir processing; the processing area includes a plurality of processing sections; each processing section corresponds to a different processing parameter range; Step 2) characterizing the plurality of processing sections and establishing a constitutive relationship model between processing parameters and performance.

2. The high-throughput preparation and analysis method of metal materials according to claim 1, characterized in that: The processing area is divided into n equally divided areas, each of which corresponds to a processing section; wherein n is an integer greater than 1.

3. The high-throughput preparation and analysis method of metal materials according to claim 1 or 2, characterized in that: In the step 1), the processing area is prepared by friction stir processing while the travel speed remains unchanged and the rotation speed gradually decreases; Preferably, the travel speed is 50-500 mm / min, the initial rotation speed is 2000-3000 r / min, and the rotation speed at the end of the friction stir processing is 200-500 r / min; further preferably, the acceleration of the rotation speed is 100-1500 r / min 2 .

4. The high-throughput preparation and analysis method of metal materials according to claim 1 or 2, characterized in that: In the step 1), the processing area is prepared by friction stir processing with a constant rotation speed and a gradually increasing travel speed; Preferably, when the rotation speed is constant and the travel speed is gradually increased: the rotation speed is 1000-2000r / min, the initial travel speed is 50-100mm / min, and the travel speed at the end of the stir friction processing is 1100-2000mm / min; further preferably, the acceleration of the travel speed is 50-1200mm / min 2 .

5. The high-throughput preparation and analysis method of metal materials according to any one of claims 1 to 4, characterized in that: In the step 1): A stirring tool is used to prepare a processing area on a metal material part; Preferably, the metal material piece is a plate; the thickness of the plate is greater than the depth of the processing zone; further preferably, the thickness of the processing zone is 1-4 mm; Preferably, the stirring tool comprises a shaft shoulder and a stirring needle; Preferably, the diameter of the shoulder is 3-5 times the thickness of the plate; the stirring needle is a three-plane conical thread needle, and the root diameter of the stirring needle is 0.8-1.2 times the thickness of the plate.

6. The high-throughput preparation and analysis method of metal materials according to claim 5, characterized in that: The material used for the metal material piece is one of aluminum alloy, magnesium alloy, aluminum-based / magnesium-based composite material, steel, and titanium alloy; Preferably, when the material used for the metal material piece is aluminum alloy or magnesium alloy, the material used for the friction stir processing tool is H13 steel; Preferably, when the material used for the metal material piece is an aluminum-based / magnesium-based composite material, the material used for the tool for the friction stir processing is a cemented carbide; Preferably, when the material used for the metal material piece is steel or titanium alloy, the material used for the tool for the friction stir processing is tungsten-rhenium alloy.

7. The high-throughput preparation and analysis method of metal materials according to claim 1, characterized in that: In the step 2), the step of characterizing the plurality of processing sections comprises: Performing performance tests on a plurality of the processing sections; Preferably, the step of characterizing the plurality of processing sections also includes: performing tissue analysis on the plurality of processing sections to obtain the corresponding relationship between each processing parameter and the tissue; further preferably, the step of performing tissue analysis on the plurality of processing sections includes: performing grain size or precipitation phase analysis in the plurality of processing sections.

8. The high-throughput preparation and analysis method of metal materials according to claim 7, characterized in that: The step of performing performance testing on a plurality of the processing sections comprises: Conducting tests on tensile strength, toughness and corrosion resistance in a plurality of the processing sections; Preferably, the speed ω(l x ), travel speed θ(l x ) and tensile strength is: Preferably, the speed ω(l x ), travel speed θ(l x ) and elongation (y elongation ) is: Preferably, the speed ω(l x ), travel speed θ(l x ) and intergranular corrosion weight loss (y Weight loss ) is: Among them, μ is the friction coefficient; P is the pressure between the shoulder and the workpiece, in N; R is the diameter of the shoulder, in mm; lx is the length of the processing area, in mm; ω is the rotation speed, which is a function related to the length of the processing area (lx), in r / min; θ is the travel speed, which is a function related to the length of the processing area (lx), in mm / min.

9. A friction stir processing method for metal materials, characterized in that: The following steps are involved: Step 1) determining the processing parameters of the metal part; wherein the processing parameters are obtained by screening the high-throughput preparation and analysis method according to any one of claims 1 to 8; Step 2) The metal part is subjected to friction stir processing using the processing parameters to obtain a metal part with optimized structure.

10. A metal part, characterized in that: The metal part is a metal part with optimized structure, wherein the metal part with optimized structure is obtained by the stir friction processing method described in claim 9.

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