A method for preparing high-strength aluminum-based alloy

Abstract

The present invention relates to the technical field of aluminum-based alloy materials, and in particular to a method for preparing a high-strength aluminum-based alloy. The present invention is capable of effectively detecting the tensile strength state of the aluminum-based alloy substrate by providing a detection unit for performing a tensile strength test on the aluminum-based alloy substrate. At the same time, the detection unit can quickly re-determine the number of defect points removed from an image when the aluminum-based alloy substrate is preliminarily determined to be unqualified, thereby avoiding the occurrence of misjudgment and improving the accuracy of the aluminum-based alloy substrate. In addition, the detection unit can quickly determine the cause of the unqualified aluminum-based alloy substrate when the aluminum-based alloy substrate is determined to be unqualified, thereby effectively avoiding the occurrence of a situation where the actually prepared aluminum-based alloy substrate does not meet expectations and improving the efficiency of preparing the aluminum-based alloy substrate.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum-based alloys, and in particular to a method for preparing a high-strength aluminum-based alloy. Background Art

[0002] High-strength aluminum alloys have the characteristics of low specific gravity, high strength, good processing performance and excellent welding performance. They are widely used in the aviation industry and civil industry. However, most of the important trunk line projects use foreign products, which often hinders the application of special conductors. Therefore, how to improve the accuracy and efficiency of high-strength aluminum-based alloy preparation is an urgent problem to be solved.

[0003] Prior art patent number: CN 115584404 B, the method provided by the prior art is a method for preparing a high-strength and high-conductivity 1 series aluminum alloy cathode plate substrate, comprising the following preparation process: melting-homogenization heat treatment-hot rolling-cold rolling-cross-shearing-packaging; on the one hand, the invention reduces the shrinkage cavity, looseness and other defects in the ingot by controlling the Fe-Si ratio, refines the Fe-rich phase by increasing the addition ratio of the grain refiner, and changes the morphology and distribution of the Fe-rich phase in the matrix by appropriate homogenization heat treatment to achieve high conductivity and good corrosion resistance; on the other hand, the strength of the hot-rolled billet is increased by reducing the final rolling temperature of the hot-rolled billet, and the work hardening rate during cold rolling is increased by increasing the thickness of the hot-rolled billet to achieve high strength of the substrate, and finally obtains a 1 series cathode plate substrate with a strength of more than 135MPa, a conductivity of more than 61.5%IACS, and a thickness of 7.0mm. However, the prior art does not solve the problem of efficiency and precision in the preparation of high-strength aluminum-based alloys. Summary of the invention

[0004] To this end, the present invention provides a method for preparing a high-strength aluminum-based alloy, so as to overcome the problems of low efficiency and low precision in the preparation of high-strength aluminum-based alloy in the prior art.

[0005] To achieve the above object, the present invention provides a method for preparing a high-strength aluminum-based alloy, comprising:

[0006] The prepared raw materials are placed in a smelting furnace for smelting, and then the melt is introduced into a refining furnace for refining, degassing and deslagging, and then cast into an aluminum-based alloy ingot;

[0007] The aluminum-based alloy ingot is subjected to homogenization heat treatment and then subjected to multiple hot rolling to obtain a hot-rolled billet;

[0008] The hot rolled billet is subjected to two cold rolling passes to obtain a cold rolled billet;

[0009] The cold-rolled blank is cleaned by a cleaning brush, straightened, and cut into plates to obtain an aluminum-based alloy substrate;

[0010] The aluminum-based alloy substrate is subjected to a tensile strength test of the detection unit;

[0011] The image information of the aluminum-based alloy substrate before and after the test is collected by the acquisition module in the detection unit, and the image is processed to remove defect points and the number of defect points removed from the image is recorded; the overlap and the deformation of the aluminum-based alloy substrate are calculated according to the image information processed by the processing module, and the detection unit determines whether the aluminum-based alloy substrate is qualified based on the acquired overlap, and re-determines the number of defect points removed from the image if the aluminum-based alloy substrate is preliminarily determined to be unqualified. If the aluminum-based alloy substrate is determined to be unqualified, the reason for the unqualified aluminum-based alloy substrate is determined based on the overlap difference.

[0012] Furthermore, when the detection unit preliminarily determines that the aluminum-based alloy substrate is unqualified based on the acquired overlap, it makes a secondary determination; when it is determined that the operation of the aluminum-based alloy preparation is unqualified, the reason for the unqualified aluminum-based alloy substrate is re-determined; the overlap is the ratio of the length of the overlapping line segment in the contour line in the image information of the aluminum-based alloy substrate after the tensile strength test and the contour line in the image information of the aluminum-based alloy substrate before the test to the total length of the contour line in the image information of the aluminum-based alloy substrate before the test.

[0013] Furthermore, when the detection unit determines for the second time that the aluminum-based alloy substrate is unqualified based on the number of defect points removed from the image of the processing module, the tensile strength test is re-performed after re-determining the number of defect points removed from the image.

[0014] Further, the detection unit determines the reason why the aluminum-based alloy substrate is unqualified based on the overlap difference, wherein:

[0015] If the cause is a problem with the hot rolling billet temperature, the hot rolling billet temperature is re-determined based on the deformation of the aluminum-based alloy substrate;

[0016] If the cause is the thickness of the cold-rolled billet, the thickness of the cold-rolled billet is re-determined based on the secondary difference of the overlap;

[0017] If the cause is the problem of deviation caused by inadequate cleaning of the cold-rolled billet, the speed of the cleaning brush is re-determined based on the secondary proportion of overlap;

[0018] The overlap difference is the difference between the first overlap reference preset in the detection unit and the overlap.

[0019] Furthermore, the processing module is provided with several correction methods for removing defective points from the image based on the overlap ratio, and the correction amplitude of each correction method is different; wherein the overlap ratio is the ratio of the overlap to the first overlap benchmark preset by the processing module.

[0020] Compared with the prior art, the beneficial effect of the present invention lies in that the present invention is capable of effectively detecting the tensile strength state of the aluminum-based alloy substrate by providing a detection unit to perform a tensile strength test on the aluminum-based alloy substrate, and at the same time, the detection unit can quickly re-determine the number of defect points to be removed from the image when the aluminum-based alloy substrate is preliminarily determined to be unqualified, thereby avoiding the occurrence of misjudgment and improving the accuracy of the aluminum-based alloy substrate, and can quickly determine the cause of the unqualified aluminum-based alloy substrate when the aluminum-based alloy substrate is determined to be unqualified, effectively avoiding the occurrence of a situation where the actually prepared aluminum-based alloy substrate does not meet expectations, thereby improving the efficiency of aluminum-based alloy substrate preparation.

[0021] Furthermore, the present invention can save time in finding the cause and further improve the efficiency of preparing the aluminum-based alloy substrate by judging whether the aluminum-based alloy substrate is qualified and quickly determining the cause of the unqualified aluminum-based alloy substrate if it is unqualified.

[0022] Furthermore, the present invention can further avoid the occurrence of deviation misjudgment caused by a small number of defect points removed from the image by secondarily determining whether the aluminum-based alloy substrate is qualified, thereby further improving the efficiency of aluminum-based alloy substrate preparation.

[0023] Furthermore, the present invention can avoid the situation where the actually prepared aluminum-based alloy substrate does not meet expectations by determining the reason why the aluminum-based alloy substrate is unqualified, thereby improving the efficiency of preparing the aluminum-based alloy substrate.

[0024] Furthermore, the present invention can accurately determine the correction method for removing the number of defect points from an image through the overlap ratio, thereby improving the efficiency of preparing the aluminum-based alloy substrate.

[0025] Furthermore, the present invention can quickly determine the adjustment method of the billet temperature in the hot rolling furnace through the deformation amount of the aluminum-based alloy substrate, thereby improving the efficiency of preparing the aluminum-based alloy substrate.

[0026] Furthermore, the present invention can quickly determine the rotation speed of the cleaning shaft of the blank in the cleaning furnace through the secondary proportion of the overlap degree, thereby improving the efficiency of preparing the aluminum-based alloy substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of the high-strength aluminum-based alloy prepared in the present invention;

[0028] Figure 2 A flow chart showing the steps for preparing the high-strength aluminum-based alloy of the present invention;

[0029] Figure 3 A flow chart for determining whether the high-strength aluminum-based alloy substrate of the present invention is qualified;

[0030] Figure 4A secondary determination flow chart of whether the high-strength aluminum-based alloy substrate of the present invention is qualified;

[0031] Among them, 1 is a smelting furnace, 2 is a casting furnace, 3 is a hot rolling furnace, 4 is a cold rolling furnace, 5 is a cleaning furnace, 6 is a cleaning shaft, and 7 is a detection unit. DETAILED DESCRIPTION

[0032] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0034] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] At the same time, it should be noted that the data in this embodiment are obtained by comprehensive analysis and evaluation of the historical test data and corresponding historical test results of the system of the present invention in the three months before this test. The system of the present invention comprehensively determines the values ​​of the preset parameter benchmarks for this test based on the results of the cumulative tests in the previous three months before this test. It can be understood by those skilled in the art that the determination method of the system of the present invention for a single parameter mentioned above can be to select the value with the highest proportion as the preset benchmark parameter according to the data distribution, use weighted summation to use the obtained value as the preset benchmark, use the value of each historical data as the preset benchmark parameter or other selection methods, as long as the system of the present invention can clearly define the different specific situations in the single determination process through the obtained values.

[0036] See also Figure 1 As shown, it is a schematic diagram of the structure of the preparation of high-strength aluminum-based alloy according to an embodiment of the present invention; the preparation of high-strength aluminum-based alloy according to the present invention includes a smelting furnace 1, a casting furnace 2, a hot rolling furnace 3, a cold rolling furnace 4, a cleaning furnace 5, a cleaning shaft 6, and a detection unit 7, wherein:

[0037] Raw materials; the raw materials are prepared according to the weight percentage composition: Si = 0.10%, Fe = 0.15%, Al = 99.70%, and other unavoidable single elements ≤ 0.05%;

[0038] Melting furnace 1 and casting furnace 2; which are used to place the raw materials in the melting furnace for melting, then introduce the melt into the refining furnace for refining, and then after degassing and deslagging, add online grain refiner Al-5Ti-1 B wire in the flow trough to cast into aluminum alloy ingots;

[0039] Hot rolling furnace 3; used to saw and mill the aluminum alloy ingot obtained from casting furnace 2 and then place it in a heating furnace for homogenization heat treatment, and the metal temperature is controlled at 600°C; the aluminum alloy ingot after homogenization heat treatment is subjected to multiple hot rolling, and the hot rolling is suspended before the last hot rolling, and the last hot rolling is carried out when the temperature of the hot-rolled billet drops to 220°C, the billet thickness after hot rolling is 14.0mm, and the hot rolling final temperature of the billet after hot rolling is 200°C;

[0040] Cold rolling furnace 4; used to cold-roll the 14.0 mm thick billet obtained in hot rolling furnace 3 by two passes to obtain a 7.0 mm thick cold rolled billet, the first pass cold rolling processing rate is 20%, the unwinding tension is not more than 5N / mm2, and the second pass is rolled to a 7.0 mm thick cold rolled billet;

[0041] The cleaning furnace 5 is used to obtain an aluminum alloy substrate by cleaning, straightening and cutting the cold-rolled billet obtained by the cold-rolling furnace 4 through transverse shearing; wherein the cleaning shaft is used to adjust the rotation speed.

[0042] The detection unit 7 includes an acquisition module and a processing module. The acquisition module is used to collect image information of the aluminum-based alloy substrate before and after the test to process the image to remove defect points and record the number of defect points removed from the image. The detection unit is used to calculate the overlap and the deformation of the aluminum-based alloy substrate according to the image information processed by the processing module. The detection unit determines whether the aluminum-based alloy substrate is qualified based on the acquired overlap, and re-determines the number of defect points removed from the image when the aluminum-based alloy substrate is preliminarily determined to be unqualified. If the aluminum-based alloy substrate is determined to be unqualified, the reason for the unqualified aluminum-based alloy substrate is determined based on the overlap difference. The present invention is provided with a detection unit to perform a tensile strength test on the aluminum-based alloy substrate, which can effectively detect the tensile strength state of the aluminum-based alloy substrate. At the same time, the detection unit can quickly re-determine the number of defect points removed from the image when the aluminum-based alloy substrate is preliminarily determined to be unqualified, thereby avoiding the occurrence of misjudgment and improving the accuracy of the aluminum-based alloy substrate. When the aluminum-based alloy substrate is determined to be unqualified, the reason for the unqualified aluminum-based alloy substrate can be quickly determined, effectively avoiding the occurrence of the situation that the actually prepared aluminum-based alloy substrate does not meet the expectations, and improving the efficiency of the preparation of the aluminum-based alloy substrate.

[0043] See also Figure 2 As shown, it is a flow chart of the steps for preparing the high-strength aluminum-based alloy of the present invention;

[0044] The preparation steps of the high-strength aluminum-based alloy of the present invention include:

[0045] Step S1, placing the prepared raw materials in a smelting furnace for smelting, then introducing the melt into a refining furnace for refining, degassing and deslagging, and then casting into an aluminum-based alloy ingot;

[0046] Step S2, subjecting the aluminum-based alloy ingot to homogenization heat treatment and then performing hot rolling for multiple times to obtain a hot-rolled billet;

[0047] Step S3, subjecting the hot-rolled billet to two cold-rolling passes to obtain a cold-rolled billet;

[0048] Step S4, cleaning the cold-rolled blank with a cleaning brush, straightening, and cutting the blank into a plate to obtain an aluminum-based alloy substrate;

[0049] Step S5, subjecting the aluminum-based alloy substrate to a tensile strength test of a detection unit;

[0050] Step S6, according to the image information of the aluminum-based alloy substrate before and after the test collected by the acquisition module in the detection unit, the image is processed to remove defect points and the number of defect points removed from the image is recorded; the overlap and the deformation of the aluminum-based alloy substrate are calculated according to the image information processed by the processing module, and the detection unit determines whether the aluminum-based alloy substrate is qualified based on the acquired overlap, and re-determines the number of defect points removed from the image if the aluminum-based alloy substrate is preliminarily determined to be unqualified; if the aluminum-based alloy substrate is determined to be unqualified, the reason for the unqualified aluminum-based alloy substrate is determined based on the overlap difference.

[0051] See also Figure 3 As shown, it is a flow chart for determining whether the high-strength aluminum-based alloy substrate of the present invention is qualified; the detection unit determines whether the aluminum-based alloy substrate is qualified based on the acquired overlap, wherein:

[0052] If the overlap is less than or equal to a preset first overlap reference, the detection unit preliminarily determines that the aluminum-based alloy substrate is unqualified, and secondarily determines whether the aluminum-based alloy substrate is qualified based on the number of defect points removed from the image;

[0053] If the overlap is greater than a preset first overlap reference and less than or equal to a preset second overlap reference, the detection unit determines that the aluminum-based alloy preparation operation is unqualified, and determines the reason why the aluminum-based alloy substrate is unqualified based on the overlap difference;

[0054] If the overlap is greater than a preset second overlap reference, the detection unit determines that the aluminum-based alloy substrate is qualified and continues to prepare the aluminum-based alloy;

[0055] The overlap is the ratio of the length of the overlapping line segments of the contour lines in the image information of the aluminum-based alloy substrate after the tensile strength test and the contour lines in the image information of the aluminum-based alloy substrate before the test to the total length of the contour lines in the image information of the aluminum-based alloy substrate before the test.

[0056] See also Figure 4 As shown, it is a secondary determination flow chart of whether the high-strength aluminum-based alloy substrate of the present invention is qualified; the detection unit secondary determines whether the aluminum-based alloy substrate is qualified based on the number of defect points removed from the processing module image, wherein:

[0057] If the quantity is less than or equal to the preset quantity reference, the detection unit determines for the second time that the aluminum-based alloy substrate is qualified and continues to maintain the aluminum-based alloy preparation state;

[0058] If the number is greater than the preset number benchmark, the detection unit determines for the second time that the aluminum-based alloy substrate is unqualified because the small number of defect points removed from the image causes a large deviation in the image contour information. The number of defect points removed from the image is redetermined based on the overlap ratio and the tensile strength test is performed again.

[0059] Specifically, the detection unit determines the reason why the aluminum-based alloy substrate is unqualified based on the difference in overlap, where:

[0060] If the difference is less than or equal to a preset first difference reference, the detection unit determines that the reason why the aluminum-based alloy substrate is unqualified is a problem with the hot-rolled billet temperature, and re-determines the hot-rolled billet temperature based on the deformation amount of the aluminum-based alloy substrate;

[0061] If the difference is greater than a preset first difference reference and less than or equal to a preset second difference reference, the detection unit determines that the reason why the aluminum-based alloy substrate is unqualified is a problem with the thickness of the cold-rolled billet, and redetermines the thickness of the cold-rolled billet based on the secondary difference of the overlap;

[0062] If the difference is greater than a preset second difference reference, the detection unit determines that the reason for the unqualified operation of the aluminum-based alloy preparation is the problem of deviation caused by insufficient cleaning of the cold-rolled billet, and re-determines the rotation speed of the cleaning brush based on the secondary proportion of the overlap;

[0063] The overlap difference is the difference between the first overlap reference preset in the detection unit and the overlap.

[0064] Specifically, the processing module is provided with several adjustment methods for the number of defect points removed from the image of the detection unit based on the overlap ratio, wherein:

[0065] If the overlap ratio is less than or equal to a preset first overlap ratio benchmark, the processing module uses a first quantity correction coefficient α1 to correct the number of defect points removed from the image to a corresponding value;

[0066] If the overlap ratio is greater than a preset first overlap ratio benchmark and less than or equal to a preset second overlap ratio benchmark, the processing module uses a second quantity correction coefficient α2 to correct the quantity of defect points removed from the image to a corresponding value;

[0067] If the overlap ratio is greater than a preset second overlap ratio benchmark, the processing module uses a third quantity correction coefficient α3 to correct the quantity of defect points removed from the image to a corresponding value;

[0068] Among them, the overlap ratio is the ratio of the overlap to the first overlap benchmark preset by the processing module; and the correction formula adopted by the present invention is, T = t × αn, wherein, t is the number of defect points removed from the image before correction, T is the number of defect points removed from the image after correction, n is 1, 2, 3, αn is the correction coefficient of the number of defect points removed from the image, and this embodiment adopts, α1 = 0.99; α2 = 0.97; α3 = 0.95; the present invention avoids the occurrence of deviations caused by too few defect points removed from the image by correcting the number of defect points removed from the image, thereby further improving the efficiency of preparing the aluminum-based alloy substrate.

[0069] Specifically, the processing module is provided with several adjustment methods for the billet temperature in the hot rolling furnace based on the deformation amount of the aluminum-based alloy substrate, wherein:

[0070] If the deformation is less than or equal to a preset first deformation reference, the processing module uses the first temperature adjustment coefficient β1 to adjust the temperature control button of the billet in the hot rolling furnace to a corresponding value;

[0071] If the deformation is greater than a preset first deformation reference and less than or equal to a preset second deformation reference, the processing module uses the second temperature adjustment coefficient β2 to adjust the blank temperature control button in the hot rolling furnace to a corresponding value;

[0072] If the deformation is greater than the preset second deformation reference, the processing module uses the third temperature adjustment coefficient β3 to adjust the temperature control button of the billet in the hot rolling furnace to a corresponding value;

[0073] The deformation is the maximum value of the difference between the corresponding position of the contour line of the aluminum-based alloy substrate after the tensile strength test and the corresponding position of the contour line in the image information of the aluminum-based alloy substrate before the test. In this embodiment, K = k × βn, where k is the preset billet temperature value in the hot rolling furnace before adjustment, K is the preset billet temperature value in the hot rolling furnace after adjustment, n is 1, 2, 3, βn is the adjustment coefficient of the preset billet temperature in the hot rolling furnace, and this embodiment adopts α1 = 0.98; α2 = 0.95; α3 = 0.93.

[0074] Specifically, the processing module is provided with several adjustment methods for the thickness of the cold rolling blank mold of the cold rolling furnace based on the secondary difference of the overlap degree, wherein:

[0075] If the overlap secondary difference is less than or equal to the preset first difference reference, the processing module uses the first thickness adjustment coefficient δ1 to adjust the cold rolling furnace cold rolling blank thickness mold to a corresponding value;

[0076] If the overlap secondary difference is greater than the preset first difference reference and less than or equal to the preset second difference reference, the processing module uses the second thickness adjustment coefficient δ2 to adjust the cold rolling furnace cold rolling blank thickness mold to a corresponding value;

[0077] If the overlap secondary difference is greater than the preset second difference reference, the processing module uses the third thickness adjustment coefficient δ3 to adjust the cold rolling furnace cold rolling blank thickness mold to a corresponding value;

[0078] Wherein: the second difference of the overlap is the difference between the overlap and the preset second overlap reference. In this embodiment, G = g × δn, wherein g is the blank thickness of the cold rolling die before adjustment, G is the blank thickness of the cold rolling die after adjustment, n is 1, 2, 3, δn is the adjustment coefficient of the cold rolling die thickness, and this embodiment adopts δ1 = 0.99; δ2 = 0.96; δ3 = 0.94.

[0079] Specifically, the processing module is provided with several adjustment methods for the rotation speed of the cleaning shaft of the blank in the cleaning furnace based on the secondary proportion of the overlap, wherein:

[0080] If the secondary proportion of the overlap degree is less than or equal to the preset first proportion reference, the processing module uses the first speed adjustment coefficient γ1 to adjust the speed of the blank cleaning shaft in the cleaning furnace to a corresponding value;

[0081] If the secondary proportion of the overlap degree is greater than the preset first proportion reference and less than or equal to the preset second proportion reference, the processing module uses the second speed adjustment coefficient γ2 to adjust the speed of the blank cleaning shaft in the cleaning furnace to a corresponding value;

[0082] If the secondary proportion of the overlap degree is greater than the preset second proportion reference, the processing module uses the third speed adjustment coefficient γ3 to adjust the speed of the blank cleaning shaft in the cleaning furnace to a corresponding value;

[0083] Wherein: the said overlap secondary ratio is the ratio of the overlap to the preset second overlap reference. In this embodiment, V=v×γn is adopted, wherein v is the blank cleaning shaft speed before adjustment, V is the blank cleaning shaft speed after adjustment, n is 1, 2, 3, γn is the adjustment coefficient of the shaft speed, and in this embodiment, γ1=1.12; γ2=1.14; γ3=1.16 is adopted.

[0084] Specifically, a stamping test at a pressure of 140 MPa was performed on the aluminum-based alloy substrate during the tensile strength test.

[0085] Specifically, during the homogenization heat treatment in the heating furnace of the aluminum-based alloy ingot, the metal temperature is controlled at 600°C; the aluminum alloy ingot after the homogenization heat treatment is subjected to multiple hot rolling, and the hot rolling is suspended before the last hot rolling, and the last hot rolling is carried out when the temperature of the hot-rolled billet drops to 220°C. The thickness of the billet after hot rolling is 14.0 mm, and the final hot rolling temperature of the billet after hot rolling is 200°C.

[0086] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a high-strength aluminum-based alloy, characterized in that: include: The prepared raw materials are placed in a smelting furnace for smelting, and then the melt is introduced into a refining furnace for refining, degassing and deslagging, and then cast into an aluminum-based alloy ingot; The aluminum-based alloy ingot is subjected to homogenization heat treatment and then subjected to multiple hot rolling to obtain a hot-rolled billet; The hot rolled billet is subjected to two cold rolling passes to obtain a cold rolled billet; The cold-rolled blank is cleaned by a cleaning brush, straightened, and cut into plates to obtain an aluminum-based alloy substrate; The aluminum-based alloy substrate is subjected to a tensile strength test of the detection unit; The image information of the aluminum-based alloy substrate before and after the test is collected by the collection module in the collection unit, and the defect points are removed from the image and the number of defect points removed from the image is recorded; The overlap and the deformation of the aluminum-based alloy substrate are calculated according to the image information processed by the processing module. The detection unit determines whether the aluminum-based alloy substrate is qualified based on the acquired overlap, and re-determines the number of defect points to be removed from the image if the aluminum-based alloy substrate is preliminarily determined to be unqualified. If the aluminum-based alloy substrate is determined to be unqualified, the reason for the unqualified aluminum-based alloy substrate is determined based on the overlap difference; The detection unit makes a secondary determination when the aluminum-based alloy substrate is initially determined to be unqualified based on the acquired overlap; and re-determines the reason why the aluminum-based alloy substrate is unqualified when the operation of the aluminum-based alloy preparation is determined to be unqualified; the overlap is the ratio of the length of the overlapping line segment between the contour line in the image information of the aluminum-based alloy substrate after the tensile strength test and the contour line in the image information of the aluminum-based alloy substrate before the test to the total length of the contour line in the image information of the aluminum-based alloy substrate before the test; When the detection unit determines that the aluminum-based alloy substrate is unqualified based on the number of defect points removed from the image of the processing module, the tensile strength test is re-performed after the number of defect points removed from the image is re-determined; The detection unit determines the reason why the aluminum-based alloy substrate is unqualified based on the overlap difference, wherein: If the cause is a problem with the hot rolling billet temperature, the hot rolling billet temperature is re-determined based on the deformation of the aluminum-based alloy substrate; If the cause is the thickness of the cold-rolled billet, the thickness of the cold-rolled billet is re-determined based on the secondary difference of the overlap; If the cause is the problem of deviation caused by inadequate cleaning of the cold-rolled billet, the speed of the cleaning brush is re-determined based on the secondary proportion of overlap; Wherein, the overlap difference is the difference between the first overlap reference preset in the detection unit and the overlap; The secondary difference of the overlap is the difference between the overlap and a preset second overlap reference; The secondary proportion of the overlap is the ratio of the overlap to a preset second overlap reference.

2. The method for preparing a high-strength aluminum-based alloy according to claim 1, characterized in that: The processing module is provided with several correction methods for removing defect points from the image based on the overlap ratio, and the correction range of each correction method is different; wherein the overlap ratio is the ratio of the overlap to the first overlap reference preset by the processing module.

3. The method for preparing a high-strength aluminum-based alloy according to claim 1, characterized in that: The processing module is provided with several adjustment methods for the billet temperature in the hot rolling furnace based on the deformation amount of the aluminum-based alloy substrate, and the adjustment range of each adjustment method is different; the deformation amount is the maximum value of the difference between the corresponding position of the contour line of the aluminum-based alloy substrate after the tensile strength test and the corresponding position of the contour line in the image information of the aluminum-based alloy substrate before the test.

4. The method for preparing a high-strength aluminum-based alloy according to claim 1, characterized in that: The processing module is provided with several adjustment methods for the thickness mold of the cold rolling furnace cold rolling billet based on the secondary difference of overlap, and the adjustment range of each adjustment method is different; the secondary difference of overlap is the difference between the overlap and the preset second overlap benchmark.

5. The method for preparing a high-strength aluminum-based alloy according to claim 1, characterized in that: The processing module is provided with several adjustment methods for the rotation speed of the cleaning shaft of the blank in the cleaning furnace based on the secondary proportion of overlap, and the adjustment range of each adjustment method is different; the secondary proportion of overlap is the ratio of the overlap to the preset second overlap benchmark.

6. The method for preparing a high-strength aluminum-based alloy according to claim 1, characterized in that: The tensile strength test of aluminum alloy substrate was conducted at a pressure of 140 MPa.

7. The method for preparing a high-strength aluminum-based alloy according to claim 1, characterized in that: During the homogenization heat treatment in the heating furnace of the aluminum-based alloy ingot, the metal temperature is controlled at 600°C; the aluminum alloy ingot after the homogenization heat treatment is subjected to multiple hot rollings, and the hot rolling is suspended before the last hot rolling, and the last hot rolling is carried out when the temperature of the hot-rolled billet drops to 220°C. The thickness of the billet after hot rolling is 14.0 mm, and the hot rolling final temperature of the billet after hot rolling is 200°C.

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