A high-strength copper-steel bimetallic composite material and its preparation method

Abstract

The present invention discloses a high-strength copper-steel bimetallic composite material and a preparation method thereof. The method comprises: selecting copper and steel substrates for preparing the high-strength copper-steel bimetallic composite material; welding the copper and steel substrates using electron beam additive manufacturing technology; scanning the weld of the copper-steel bimetallic composite material using an ultrasonic detection system; analyzing and processing the scanned image using a computer; performing secondary processing on the copper-steel bimetallic composite material using a rolling composite method; annealing the copper-steel bimetallic composite material; testing the performance of the high-strength copper-steel bimetallic composite material; and storing the preparation data in the cloud via a computer. The method of the present invention combines electron beam additive manufacturing technology with the rolling composite method, thereby enabling the copper-steel bimetallic composite material to improve its own strength during the preparation process, detecting the composite material using an ultrasonic detection system to screen the qualified rate of the composite material, and further enhancing the performance of the composite material through annealing.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material preparation, and in particular to a high-strength copper-steel bimetallic composite material and a preparation method thereof. Background Art

[0002] Copper-steel composites are composite materials that combine copper and steel. They combine the excellent properties of copper with the high strength and low cost of steel. These composites offer strong copper cladding, a good plate shape, good deep-drawing and electrical conductivity. Compared to ordinary steel, they offer significantly improved corrosion resistance, oxidation resistance, and surface quality. Compared to ordinary copper, they offer similar performance but with less copper. Furthermore, the copper-steel combination combines the advantages of copper: copper's electrical conductivity, thermal conductivity, and corrosion resistance, along with steel's high strength, good mechanical properties, and cost advantages. Certain industrial fields, such as substation grounding grids and automotive parts, require materials that combine electrical conductivity, mechanical strength, and corrosion resistance. Copper-steel composites can meet these specialized requirements, resulting in high overall performance and widespread application across various industries.

[0003] With the continuous advancement of science and technology and continued market demand, the preparation technologies for copper-steel composite materials have been continuously expanded and improved, including hot-rolling lamination, cold-rolling lamination, arc spraying lamination, and explosive lamination. Each of these preparation processes has its own unique advantages. For example, hot-rolling lamination can achieve large-area lamination, while cold-rolling lamination excels in improving the strength and toughness of the material. Arc spraying lamination offers significant advantages in surface treatment, capable of forming uniform and dense coatings. Explosive lamination, with its unique combination of rapid cooling and high-pressure bonding, can produce composite materials with excellent performance. However, these preparation processes often have limitations. For example, hot-rolling lamination may lead to uneven material properties in some cases, while cold-rolling lamination may require high equipment costs and complex process control. Arc spraying lamination may face the problem of insufficient bonding strength between the coating and the substrate, while explosive lamination may have strict operating environment and safety requirements. Therefore, how to maximize the advantages of these preparation processes while overcoming their limitations has become a hot topic in materials science research.

[0004] Chinese invention patent CN101660096A discloses a copper-steel-copper composite material and its preparation method, comprising: surface-treating copper and steel, followed by cold rolling into high-precision steel and copper strips; cleaning the surfaces, removing surface residues, and degreasing; placing the steel strip in the middle, with two copper strips on either side of the steel, and cold rolling into a high-precision copper-steel composite strip; annealing the copper-steel composite strip in a vacuum furnace at 650-850°C for 1-4 hours to dissolve the structural molecules of the composite layer of the two metal materials, followed by cooling to room temperature in the vacuum furnace; laminating the two strips to form a single composite; finish-rolling the strips; flattening and polishing the composite material, and then shearing and packaging the strips according to user requirements. This invention only uses a hot rolling lamination process to achieve the lamination of the copper and steel substrates, and does not further improve the preparation process of the copper-steel composite material. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The present invention provides a method for preparing a high-strength copper-steel bimetallic composite material, comprising:

[0007] S1 selects copper and steel substrates for preparing high-strength copper-steel bimetallic composite materials;

[0008] S2 uses electron beam additive manufacturing technology to weld copper and steel substrates;

[0009] S3 uses an ultrasonic testing system to scan the welds of copper-steel bimetallic composite materials;

[0010] S4 analyzes and processes the scanned image through a computer;

[0011] S5 uses rolling composite method to perform secondary treatment on copper-steel bimetallic composite materials;

[0012] S6 performs annealing treatment on the copper-steel bimetallic composite material;

[0013] S7 tests the performance of high-strength copper-steel bimetallic composite materials;

[0014] S8 stores the preparation data in the cloud via a computer.

[0015] The beneficial effects brought about by the technical solution provided by the present invention include at least:

[0016] The present invention selects copper and steel substrates for preparing high-strength copper-steel bimetallic composite materials; welds the copper and steel substrates using electron beam additive manufacturing technology; scans the welds of the copper-steel bimetallic composite materials using an ultrasonic detection system; analyzes and processes the scanned images using a computer; performs secondary processing on the copper-steel bimetallic composite materials using a rolling composite method; anneals the copper-steel bimetallic composite materials; tests the performance of the high-strength copper-steel bimetallic composite materials; and stores the preparation data in the cloud via a computer. The present invention combines electron beam additive manufacturing technology with the rolling composite method to improve the strength of the copper-steel composite materials during the preparation process. By testing the composite materials using an ultrasonic detection system, the qualified rate of the composite materials can be screened to prevent unqualified composite materials from entering secondary processing and affecting subsequent use. At the same time, the performance of the composite materials can be further enhanced through annealing. Finally, by testing the performance of the plate, it is possible to analyze whether there are defects in the preparation process of the composite materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a flow chart of a method for preparing a high-strength copper-steel bimetallic composite material provided by an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of an ultrasonic scanning image of a weld of a copper-steel composite material provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0021] Embodiments A high-strength copper-steel bimetallic composite material and a preparation method thereof.

[0022] Please refer to Figure 1 This is a flow chart of a high-strength copper-steel bimetallic composite material and a preparation method thereof provided in an embodiment of the present invention.

[0023] S1 selects copper and steel substrates for preparing high-strength copper-steel bimetallic composite materials, wherein:

[0024] The copper-steel bimetallic composite material uses copper plate and carbon steel plate as composite base materials, and the length and width of the copper plate and the carbon steel plate must be consistent;

[0025] It should be noted that T2 type copper plate and Q235B type carbon steel are selected here. In the actual preparation process, the types of copper plate and carbon steel should also be included in the selection influencing factors, and the error in the length and width of the selected copper plate and carbon steel plate should be less than 5mm.

[0026] The preparation of the copper-steel bimetallic composite material uses the thickness of the copper plate and the carbon steel plate as the influencing factors for selection, and the thickness selection influencing factors between the copper plate and the carbon steel plate are divided into three intervals, wherein the thickness of the copper plate is greater than the thickness of the carbon steel plate, the thickness of the copper plate is the same as the thickness of the carbon steel plate, and the thickness of the carbon steel plate is greater than the thickness of the copper plate;

[0027] It should be noted that the thickness of the copper plate and the carbon steel plate selected here are both 10 mm. During the preparation process, the maximum thickness distance between the copper plate and the carbon steel plate should be less than 20 mm.

[0028] After the copper and steel substrates are selected, their bonding surfaces are processed. The bonding surface processing steps include polishing, cleaning, and deoxidation. The polishing step uses a water-abrasive belt machine to polish the bonding surfaces of the copper and steel substrates to make them smooth. The cleaning step removes stains by emitting ultrasonic waves to the bonding surfaces of the copper and steel substrates. The deoxidation step wipes the bonding surfaces with acetone solution to expose a clean metal surface.

[0029] It should be noted that high-strength copper-steel bimetallic composite materials must meet the following requirements: tensile strength ≥ 350 MPa, yield strength ≥ 200 MPa, shear strength ≥ 200 MPa, interface bonding rate ≥ 95%, the diffusion layer must be uniform and without stratification, and must meet national testing standards.

[0030] S2 uses electron beam additive manufacturing technology to weld copper and steel substrates, including:

[0031] The parameters of the electron beam welding are divided into basic parameters and adjustment parameters. The basic parameters are the machine parameters of the electron beam emitting device, and the adjustment parameters are the offset welding position of the copper and steel joint surfaces.

[0032] The machine parameters are divided into focusing current, welding beam, and welding speed; the biased welding position is divided into copper side welding, steel side welding, and butt welding;

[0033] After the electron beam welding is completed, samples are collected from the weld of the copper-steel composite material, wherein the sample collection includes a basic area sample and a characteristic area sample, wherein the basic area selects the basic part of the weld as a sample, and the characteristic area selects the abnormal area of ​​the weld as a sample;

[0034] The basic area includes the central area, edge area and random area of ​​the weld, and the judgment factors of the characteristic area sample include pores, cracks and welding slag generated at the welding site.

[0035] It should be noted that when selecting samples, if the sample meets the selection conditions of the feature area, the feature area is used as the collected sample; if the selection conditions of the feature area do not appear in the sample, the basic area is used as the sample.

[0036] Please refer to Figure 2 This is a schematic diagram of an ultrasonic scanning image of a weld of a high-strength copper-steel bimetallic composite material and a preparation method thereof provided in an embodiment of the present invention.

[0037] S3 uses an ultrasonic testing system to scan the welds of copper-steel bimetallic composite materials, where:

[0038] The ultrasonic detection system includes an industrial computer, a signal generating card, a signal receiving card, a transmitting transducer, a receiving transducer, and a preamplifier;

[0039] The industrial computer is used to control other components in the ultrasonic detection system and draw images. The signal generating card and the signal receiving card are used to generate and receive control signals. The transmitting transducer is used to convert the control signal generated by the signal generator into a stress wave and apply it to the copper-steel composite material weld. The receiving transducer is used to receive the stress wave generated by the transmitting transducer. The preamplifier is used to amplify the stress wave signal received by the receiving transducer and transmit it to the signal receiving card.

[0040] It should be noted that the signal frequency generated by the signal generating card can be divided into 5MHz, 10MHz, and 15MHz. The three signal frequencies correspond to the three intervals of the thickness influencing factors of copper and steel substrates, respectively, to adapt to the penetration rate of copper and steel substrates of different thicknesses, and the signal frequency generated by the signal generating card is positively correlated with the thickness of the copper-steel composite material.

[0041] S4 analyzes and processes the scanned image through a computer, wherein;

[0042] The computer uses a median filter to enhance the image and estimates the error of the filter coefficients using the LMS adaptive filtering algorithm to update the coefficient values, as shown in formulas S4-1 to S4-2:

[0043] S4-1

[0044] S4-2

[0045] Where, is the difference between the input data and the ideal data; is the ideal input value; For input data; Represents input data The transpose of is the tap coefficient; is the tap coefficient for the next time; is the step size factor;

[0046] The computer uses the Canny edge detection operator to extract edges from the image after median filtering. By using the average variance and average grayscale value of the image as parameters of the high and low thresholds, the edge details in the image can be optimized, as shown in Formulas S4-3 to S4-5:

[0047] S4-3

[0048] S4-4

[0049] S4-5

[0050] Where, is the desired high threshold; represents the proportionality constant; is the mean variance of the image; is the average grayscale of the image; and are the width and height of the image respectively; represents the total threshold of the sample; Indicates that the coordinates in the mth image are The pixel value at time ;

[0051] After the image processing is completed, the computer analyzes whether the welding performance of the copper-steel bimetallic composite material meets the requirements based on the microscopic state of the weld, where the microscopic state is the distribution state of the solid solution of the copper-rich phase and the iron-rich phase in the weld.

[0052] It should be noted that if the solid solution of the copper-rich phase and the iron-rich phase at the weld is uniformly dispersed, the sample is qualified; if it is densely clustered, the sample is unqualified.

[0053] S5 uses rolling composite method to carry out secondary treatment on copper-steel bimetallic composite materials, including:

[0054] The rolling composite method includes a hot rolling composite method and a cold rolling composite method. The hot rolling composite method and the cold rolling composite method are selected based on the hardness of the copper-steel bimetallic composite material.

[0055] The hardness judgment conditions include the hardness of the carbon steel plate side, the hardness of the copper plate side, and the hardness at the weld. The selection conditions of the hot rolling composite method include the hardness of the carbon steel plate side greater than 159HV, the hardness of the copper plate side greater than 65HV, and the hardness at the weld greater than 298HV. The selection conditions of the cold rolling composite method include the hardness of the carbon steel plate side less than or equal to 159HV, the hardness of the copper plate side less than or equal to 65HV, and the hardness at the weld less than or equal to 298HV.

[0056] It should be noted that the judgment conditions for the hot rolling composite method and the cold rolling composite method use the hardness at the weld as the first reference standard. If, for example, the hardness at the weld is greater than 298HV, the hardness on the carbon steel plate side is less than 159HV, and the hardness on the copper plate side is less than 65HV, and the hardness deviation is within the range of 5HV, the hot rolling composite method can be used for processing. If the hardness deviation exceeds 5HV, the plate sample is unqualified and will not be adopted. The same applies to the judgment of the cold rolling composite method.

[0057] S6 performs annealing treatment on the copper-steel bimetallic composite material, wherein:

[0058] The holding time of the copper-steel bimetallic composite material annealing treatment is 1.5 hours, and the annealing treatment temperature is divided into five nodes: 600, 650, 700, 750, and 800 degrees Celsius;

[0059] The annealing temperature is selected by computer verification of the diffusion coefficient of the copper-steel bimetallic composite material, as shown in Formula S6-1:

[0060]

[0061] Where, is the diffusion coefficient; is the diffusion constant; is the diffusion activation energy; is the gas constant; is the thermodynamic temperature; is a natural function.

[0062] It should be noted that under normal circumstances, the diffusion coefficient is positively correlated with the thermodynamic temperature. Therefore, the diffusion activation energy of the copper-steel material can be determined by observing the scanning image through the ultrasonic scanning system, that is, whether the current annealing temperature matches the actual diffusion coefficient.

[0063] S7 tests the performance of high-strength copper-steel bimetallic composite materials, including:

[0064] The performance test includes macroscopic performance analysis and microscopic structure analysis, the macroscopic performance analysis includes mechanical performance testing and chemical performance testing, and the microscopic structure analysis includes metal bonding state testing and metal distribution state testing;

[0065] It should be noted that the macroscopic properties of composite materials are tested in accordance with the inspection standards proposed in GB / T 36162-2018 and GB / T 6396-2008.

[0066] The mechanical properties test includes tensile test, shear test, wear resistance test, and hardness test; the chemical properties test includes corrosion resistance test and oxidation resistance test;

[0067] The metal bonding state detection and metal distribution state detection are achieved by observing the cross section of the composite material through a SEM electron microscope system. The metal bonding state detection includes the interface shape, distribution area, and metal coverage. The metal distribution state detection includes the number of holes, crack size, and cross-sectional defects.

[0068] It should be noted that the cross-sectional selection area of ​​the composite material needs to be divided according to the same standards as the sample collection at the weld, and the final results must be compared and judged.

[0069] S8 stores the preparation data in the cloud via a computer, including:

[0070] The computer stores the sample data and experimental data of the composite material prepared this time to the cloud. The staff can analyze whether the copper-steel composite material sample prepared this time is qualified through the performance test data and preparation data of the high-strength copper-steel bimetallic composite material.

[0071] It should be noted that if the performance test data of the copper-steel composite material is qualified, the data of the sample prepared this time will be recorded, and subsequent large-size plates can be prepared. If it is unqualified, the preparation data will be analyzed to find the problem.

[0072] A high-strength copper-steel bimetallic composite material, wherein the high-strength copper-steel bimetallic composite material is prepared by any one of the preparation methods described in S1-S8.

[0073] Furthermore, it should be noted that the present invention may be provided as a method, apparatus, or computer program product. Thus, embodiments of the present invention may take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media containing computer-usable program code.

[0074] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the process in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0075] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, so that a series of operation steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for implementing the process in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0076] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. The terms "comprises," "includes," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "comprises a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.

[0077] Finally, it should be noted that the above is a preferred embodiment of the present invention. It should be noted that although the preferred embodiment of the present invention has been described, it is clear that those skilled in the art, once they understand the basic inventive concept of the present invention, can make various improvements and modifications without departing from the principles of the present invention. Such improvements and modifications should also be considered as within the scope of protection of the present invention. Therefore, the appended claims are intended to be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the embodiments of the present invention.

Claims

1. A method for preparing a high-strength copper-steel bimetallic composite material, characterized in that: include: S1 selects copper and steel substrates for preparing high-strength copper-steel bimetallic composite materials; S2 uses electron beam additive manufacturing technology to weld copper and steel substrates; S3 uses an ultrasonic testing system to scan the welds of copper-steel bimetallic composite materials; S4 analyzes and processes the scanned image through a computer; S5 uses rolling composite method to perform secondary treatment on copper-steel bimetallic composite materials; S6 performs annealing treatment on the copper-steel bimetallic composite material; S7 tests the performance of high-strength copper-steel bimetallic composite materials; S8 stores the preparation data in the cloud via a computer; The S2 uses electron beam additive manufacturing technology to weld copper and steel substrates, wherein: The parameters of electron beam welding are divided into basic parameters and adjustment parameters. The basic parameters are the machine parameters of the electron beam emitting device, and the adjustment parameters are the offset welding position of the copper and steel joint surfaces. The machine parameters are divided into focusing current, welding beam, and welding speed; the biased welding position is divided into copper side welding, steel side welding, and butt welding; After the electron beam welding is completed, samples of the copper-steel composite material weld are collected. The sample collection includes basic area samples and feature area samples. The basic area selects the basic part of the weld as the sample, and the feature area selects the abnormal area of ​​the weld as the sample; The basic area includes the central area, edge area and random area of ​​the weld, and the judgment factors of the characteristic area sample include pores, cracks and welding slag generated at the weld; The S3 uses an ultrasonic testing system to scan the weld of the copper-steel bimetallic composite material, wherein: The ultrasonic detection system includes an industrial computer, a signal generating card, a signal receiving card, a transmitting transducer, a receiving transducer, and a preamplifier; The industrial computer is used to control other components in the ultrasonic detection system and draw images, the signal generating card and the signal receiving card are used to generate and receive control signals, the transmitting transducer is used to convert the control signal generated by the signal generator into a stress wave and apply it to the weld of the copper-steel composite material, the receiving transducer is used to receive the stress wave generated by the transmitting transducer, and the preamplifier is used to amplify the stress wave signal received by the receiving transducer and transmit it to the signal receiving card; the signal frequencies generated by the signal generating card are divided into 5MHz, 10MHz, and 15MHz, and the three signal frequencies correspond to the three intervals of the thickness influencing factors of the copper and steel substrates, respectively, to adapt to the penetration rates of copper and steel substrates of different thicknesses, and the signal frequency generated by the signal generating card is positively correlated with the thickness of the copper-steel composite material; The step S4 analyzes and processes the scanned image using a computer, wherein: The computer uses a median filter to enhance the image and estimates the error of the filter coefficients using the LMS adaptive filtering algorithm to update the coefficient values, as shown in formulas S4-1 to S4-2: S4-1 S4-2 Where, is the difference between the input data and the ideal data; is the ideal input value; For input data; Represents input data The transpose of is the tap coefficient; is the tap coefficient for the next time; is the step size factor; The computer uses the Canny edge detection operator to extract edges from the image after median filtering. By using the average variance and average grayscale value of the image as parameters of the high and low thresholds, the edge details in the image can be optimized, as shown in Formulas S4-3 to S4-5: S4-3 S4-4 S4-5 Where, is the desired high threshold; represents the proportionality constant; is the mean variance of the image; is the average grayscale of the image; and are the width and height of the image respectively; represents the total threshold of the sample; Indicates that the coordinates in the mth image are The pixel value at time ; After the image processing is completed, the computer analyzes whether the welding performance of the copper-steel bimetallic composite material meets the requirements based on the microscopic state of the weld, wherein the microscopic state is the distribution state of the solid solution of the copper-rich phase and the iron-rich phase in the weld; The S5 adopts a rolling composite method to perform secondary processing on the copper-steel bimetallic composite material, wherein: The rolling composite method includes a hot rolling composite method and a cold rolling composite method. The hot rolling composite method and the cold rolling composite method are selected based on the hardness of the copper-steel bimetallic composite material. The hardness judgment conditions include the hardness of the carbon steel plate side, the hardness of the copper plate side, and the hardness at the weld. The selection conditions of the hot rolling composite method include the hardness of the carbon steel plate side greater than 159HV, the hardness of the copper plate side greater than 65HV, and the hardness at the weld greater than 298HV. The selection conditions of the cold rolling composite method include the hardness of the carbon steel plate side less than or equal to 159HV, the hardness of the copper plate side less than or equal to 65HV, and the hardness at the weld less than or equal to 298HV.

2. The method for preparing the high-strength copper-steel bimetallic composite material according to claim 1, wherein: Said S1 selects copper and steel substrates for preparing high-strength copper-steel bimetallic composite materials, wherein: The copper-steel bimetallic composite material uses copper plate and carbon steel plate as composite base materials, and the length and width of the copper plate and the carbon steel plate must be consistent; The preparation of the copper-steel bimetallic composite material uses the thickness of the copper plate and the carbon steel plate as the influencing factors for selection, and the thickness selection influencing factors between the copper plate and the carbon steel plate are divided into three intervals, wherein the thickness of the copper plate is greater than the thickness of the carbon steel plate, the thickness of the copper plate is the same as the thickness of the carbon steel plate, and the thickness of the carbon steel plate is greater than the thickness of the copper plate; After the copper and steel substrates are selected, their bonding surfaces are processed. The bonding surface processing steps include polishing, cleaning, and deoxidation. The polishing step uses a water-abrasive belt machine to polish the bonding surfaces of the copper and steel substrates to make them smooth. The cleaning step removes stains by emitting ultrasonic waves to the bonding surfaces of the copper and steel substrates. The deoxidation step wipes the bonding surfaces with acetone solution to expose a clean metal surface.

3. The method for preparing the high-strength copper-steel bimetallic composite material according to claim 1, wherein: The S6 performs annealing treatment on the copper-steel bimetallic composite material, wherein: The holding time of the copper-steel bimetallic composite material annealing treatment is 1.5 hours, and the annealing treatment temperature is divided into five nodes: 600, 650, 700, 750, and 800 degrees Celsius; The annealing temperature is selected by computer verification of the diffusion coefficient of the copper-steel bimetallic composite material, as shown in Formula S6-1: S6-1 Where, is the diffusion coefficient; is the diffusion constant; is the diffusion activation energy; is the gas constant; is the thermodynamic temperature; is a natural function.

4. The method for preparing the high-strength copper-steel bimetallic composite material according to claim 1, wherein: The S7 tests the performance of the high-strength copper-steel bimetallic composite material, wherein: Performance testing includes macroscopic performance analysis and microscopic structure analysis. The macroscopic performance analysis includes mechanical performance testing and chemical performance testing. The microscopic structure analysis includes metal bonding state testing and metal distribution state testing. The mechanical properties test includes tensile test, shear test, wear resistance test, and hardness test; the chemical properties test includes corrosion resistance test and oxidation resistance test; The metal bonding state detection and metal distribution state detection are achieved by observing the cross section of the composite material through a SEM electron microscope system. The metal bonding state detection includes the interface shape, distribution area, and metal coverage. The metal distribution state detection includes the number of holes, crack size, and cross-sectional defects.

5. The method for preparing the high-strength copper-steel bimetallic composite material according to claim 1, wherein: The S8 stores the prepared data in the cloud via a computer, wherein: The computer stores the sample data and experimental data of the composite material prepared this time to the cloud. The staff can analyze whether the copper-steel composite material sample prepared this time is qualified through the performance test data and preparation data of the high-strength copper-steel bimetallic composite material.

6. A high-strength copper-steel bimetallic composite material, characterized in that: The high-strength copper-steel bimetallic composite material is prepared by the preparation method described in any one of claims 1-5.

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