High-strength copper-steel bimetallic composite material and preparation method thereof

Abstract

The invention discloses a high-strength copper-steel double-metal composite material and a preparation method of the high-strength copper-steel double-metal composite material. Copper and steel base materials for preparing the high-strength copper and steel double-metal composite material are selected; the copper base material and the steel base material are welded through the electron beam additive manufacturing technology; scanning a welding seam of the copper-steel bimetallic composite material by using an ultrasonic detection system; analyzing and processing the scanned image through a computer; carrying out secondary treatment on the copper-steel double-metal composite material by adopting a rolling compounding method; carrying out quenching treatment on the copper-steel double-metal composite material; inspecting the performance of the high-strength copper-steel bimetallic composite material; and storing the prepared data to a cloud end through a computer. According to the method, the electron beam additive manufacturing technology and the rolling composite method are combined, the strength of the copper-steel composite material can be improved in the preparation process, the composite material is detected through an ultrasonic detection system, the percent of pass of the composite material can be screened, and the performance of the composite material can be further enhanced through annealing treatment.

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 composite material is a composite material that combines copper and steel. Copper-steel composite materials combine the excellent properties of copper with the high strength and low cost of steel. This composite material has strong copper cladding, good plate shape, good deep drawing and electrical conductivity. Compared with ordinary steel, its corrosion resistance, oxidation resistance and surface quality are greatly improved. Compared with ordinary copper materials, it has similar performance but less copper. The combination of copper and steel materials can combine the advantages of both, such as the electrical conductivity, thermal conductivity and corrosion resistance of copper, and the high strength, good mechanical properties and cost advantages of steel. In addition, some industrial fields require materials to have electrical conductivity, mechanical strength and corrosion resistance at the same time, such as in the substation grounding grid, automotive parts and other scenarios. Copper-steel composite materials can meet these special needs. Therefore, the copper-steel composite materials formed by the combination of the two have high comprehensive performance and are widely used in various industries.

[0003] With the continuous advancement of science and technology and the continuous demand of the market, the preparation technology of copper-steel composite materials has been continuously expanded and improved, including hot rolling composite, cold rolling composite, arc spray composite, explosion composite and other methods. Each of these preparation processes has its own unique advantages. For example, hot rolling composite technology can achieve large-area material composite, while cold rolling composite performs well in improving the strength and toughness of materials. Arc spray composite technology has significant advantages in surface treatment and can form a uniform and dense coating. Explosion composite technology can prepare composite materials with its unique rapid cooling and high-pressure bonding characteristics. However, these preparation processes often have certain limitations. For example, hot rolling composite may lead to uneven material properties in some cases, and cold rolling composite may require high equipment costs and complex process control. Arc spray composite may face the problem of insufficient bonding strength between the coating and the substrate, while explosion composite may have high requirements for the operating environment and safety. Therefore, how to maximize the advantages of these preparation processes while overcoming their limitations has become a hot topic in the field of materials science.

[0004] Chinese invention patent CN101660096A discloses a copper-steel-copper composite material and its preparation method, including: surface treatment of copper and steel, rolling into high-precision steel strip and high-precision copper strip by cold rolling mill; after surface cleaning, removing surface residue and degreasing; placing the steel strip in the middle, and two copper strips on both sides of the steel, rolling into high-precision copper-steel composite strip by cold rolling mill; annealing the copper-steel composite strip at a temperature of 650-850 degrees in a vacuum furnace for 1-4 hours to dissolve the structural molecules of the composite layer of the two metal materials, and then cooling to room temperature in a vacuum furnace; compounding the two strips to make the strips composite into one; fine rolling the strips; leveling and polishing the composite material, and cutting and packaging the strips according to the user's requirements. This invention only uses the hot rolling composite process to realize the composite of copper and steel substrates, and does not achieve further improvement of 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: The present invention provides a method for preparing a high-strength copper-steel bimetallic composite material, comprising: S1 Selecting 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 ultrasonic testing system to scan the weld of copper-steel bimetallic composites; S4 analyzes and processes the scanned image through a computer; S5 uses rolling composite method to carry out secondary treatment of copper-steel bimetallic composite materials; S6 quenching the copper-steel bimetallic composite material; S7 examines the performance of high-strength copper-steel bimetallic composites; S8 stores the preparation data in the cloud via a computer.

[0006] The beneficial effects brought by the technical solution provided by the present invention include at least: the present invention selects copper and steel substrates for preparing high-strength copper-steel bimetallic composite materials; adopts electron beam additive manufacturing technology to weld copper and steel substrates; uses ultrasonic detection system to scan the weld of copper-steel bimetallic composite materials; analyzes and processes the scanned image by computer; adopts rolling composite method to perform secondary treatment on copper-steel bimetallic composite materials; performs quenching treatment on copper-steel bimetallic composite materials; tests the performance of high-strength copper-steel bimetallic composite materials; and stores the preparation data in the cloud through computer. The present invention combines electron beam additive manufacturing technology with rolling composite method, so that the copper-steel composite materials can improve their own strength during the preparation process, detect the composite materials through ultrasonic detection system, screen the qualified rate of the composite materials, prevent unqualified composite materials from entering secondary processing and affecting subsequent use, and further enhance the performance of the composite materials through annealing treatment. 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

[0007] 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.

[0008] Figure 1 It 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.

[0009] Figure 2 A schematic diagram of an ultrasonic scanning image of a weld of a copper-steel composite material provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0010] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0011] Embodiment A high-strength copper-steel bimetallic composite material and a preparation method thereof.

[0012] Please refer to Figure 1 It 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.

[0013] S1 selects copper and steel substrates for preparing high-strength copper-steel bimetallic composite materials, wherein: S101, the copper-steel bimetallic composite material uses copper plate and carbon steel plate as composite substrates, and the length and width of the copper plate and the carbon steel plate must be consistent; 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 copper plate and carbon steel plate should be less than 5mm.

[0014] S102, 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 of the selection, and the thickness selection influencing factors between the copper plate and the carbon steel plate are divided into three intervals, and the three intervals are that 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; 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.

[0015] S103, after the copper and steel substrates are selected, their bonding surfaces are processed. The bonding surface processing steps include grinding, cleaning, and deoxidation. The grinding step uses a water-abrasive belt machine to grind the bonding surfaces of the copper and steel substrates flat. 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.

[0016] 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.

[0017] S2 uses electron beam additive manufacturing technology to weld copper and steel substrates, including: S201, the electron beam welding parameters are divided into basic parameters and adjustment parameters, the basic parameters are machine parameters of the electron beam emitting device, and the adjustment parameters are the offset welding distance of the copper and steel joint surfaces; S202, the machine parameters are divided into focusing current, welding beam, welding speed, and the biased welding distance is divided into copper side welding, steel side welding, and butt welding; S203, after the electron beam welding is completed, samples are collected at the weld of the copper-steel composite material, wherein the sample collection includes basic area samples and characteristic area samples, 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; S204, 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 point.

[0018] 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.

[0019] Please refer to Figure 2 It is a schematic diagram of an ultrasonic scanning image of a welding point of a high-strength copper-steel bimetallic composite material and a preparation method thereof provided in an embodiment of the present invention.

[0020] S3 uses an ultrasonic testing system to scan the weld of the copper-steel bimetallic composite material, where: S301, 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; S302, 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 transducer generating card, and the preamplifier is used to amplify the stress wave signal received by the receiving transducer and transmit it to the signal receiving card.

[0021] 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 rates of copper and steel substrates of different thicknesses. The signal frequency generated by the signal generating card is positively correlated with the thickness of the copper-steel composite material.

[0022] S4 analyzes and processes the scanned image through a computer, wherein; S401, the computer uses a median filter to enhance the image, and estimates the error of the filter coefficient through the LMS adaptive filtering algorithm to update the coefficient value, as shown in formula (S4-1~S4-2):

[0023] In the formula, 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;

[0024] SS402, the computer uses the Canny edge detection operator to extract the edge of the image after median filtering, and optimizes the edge details in the image by using the average variance and average gray value of the image as parameters of the high and low thresholds, as shown in formulas (S4-3~S4-5):

[0025] In the formula, is the desired high threshold; represents the proportionality constant; is the average 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 ; S403, after the image processing is completed, the computer analyzes whether the welding performance of the copper-steel bimetallic composite material meets the requirements according to 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.

[0026] 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.

[0027] S5 uses rolling composite method to carry out secondary treatment on copper-steel bimetallic composite materials, including: S501, the rolling composite method includes a hot rolling composite method and a cold rolling composite method, and the hot rolling composite method and the cold rolling composite method of the rolling composite method are selected according to the hardness of the copper-steel bimetallic composite material; S502, 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.

[0028] It should be noted that the judgment conditions of 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.

[0029] S6: annealing the copper-steel bimetallic composite material, wherein: S601, the holding time of the annealing treatment of the copper-steel bimetallic composite material is 1.5 hours, and the annealing treatment temperature is divided into five nodes of 600, 650, 700, 750, and 800 degrees Celsius; S602, 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):

[0030] In the formula, 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.

[0031] 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.

[0032] S7 tests the performance of high-strength copper-steel bimetallic composite materials, including: S701, the performance detection includes macroscopic performance analysis and microscopic structure analysis, the macroscopic performance analysis includes mechanical performance detection and chemical performance detection, and the microscopic structure analysis includes metal bonding state detection and metal distribution state detection.

[0033] It should be noted that the macroscopic properties of composite materials are partly tested according to the inspection standards proposed in GB / T 36162-2018 and GB / T 6396-2008.

[0034] S702, the mechanical property test includes tensile test, shear test, wear resistance test, and hardness test, and the chemical property test includes corrosion resistance test and oxidation resistance test; S703, 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 interface shape, distribution area, and metal coverage, and the metal distribution state detection includes the number of holes, crack size, and cross-sectional defects.

[0035] 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 should be compared and judged.

[0036] S8 stores the preparation data in the cloud via a computer, where: S801, the computer stores the sample data and experimental data of the composite material prepared this time to the cloud, and 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.

[0037] It should be noted that if the performance test data of the copper-steel composite material is qualified, the data of the prepared sample 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.

[0038] A high-strength copper-steel bimetallic composite material, wherein the high-strength copper-steel bimetallic composite material is prepared by any preparation method described in S1-S8.

[0039] In addition, it should be noted that the present invention can be provided as a method, an apparatus or a computer program product. Therefore, the embodiments of the present invention can take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code.

[0040] 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 processes 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.

[0041] These computer program instructions may also be stored in a computer-readable memory capable of directing 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, so that the instructions executed on the computer or other programmable terminal device provide for implementing the process in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0042] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the presence of other identical elements in the process, method, article or terminal device including the elements.

[0043] Finally, it should be noted that the above is a preferred embodiment of the present invention. It should be pointed out that although the preferred embodiment of the present invention has been described, for those skilled in the art, once the basic creative concept of the present invention is known, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. Therefore, the attached 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 Selecting 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 ultrasonic testing system to scan the weld of copper-steel bimetallic composites; S4 analyzes and processes the scanned image through a computer; S5 uses rolling composite method to carry out secondary treatment of copper-steel bimetallic composite materials; S6 quenching the copper-steel bimetallic composite material; S7 examines the performance of high-strength copper-steel bimetallic composites; S8 stores the preparation data in the cloud via a computer.

2. The method for preparing the high-strength copper-steel bimetallic composite material according to claim 1, characterized in that: S1 selects copper and steel substrates for preparing high-strength copper-steel bimetallic composite materials, wherein: S101, the copper-steel bimetallic composite material uses a copper plate and a carbon steel plate as a composite substrate, and the length and width of the copper plate and the carbon steel plate must be consistent; S102, 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 of the selection, and the thickness selection influencing factors between the copper plate and the carbon steel plate are divided into three intervals, and the three intervals are that 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; S103, after the copper and steel substrates are selected, their bonding surfaces are processed. The bonding surface processing steps include grinding, cleaning, and deoxidation. The grinding step uses a water-abrasive belt machine to grind the bonding surfaces of the copper and steel substrates flat. 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, characterized in that: The S2 uses electron beam additive manufacturing technology to weld copper and steel substrates, wherein: S201, the electron beam welding parameters are divided into basic parameters and adjustment parameters, the basic parameters are machine parameters of the electron beam emitting device, and the adjustment parameters are the offset welding distance of the copper and steel joint surfaces; S202, the machine parameters are divided into focusing current, welding beam, welding speed, and the biased welding distance is divided into copper side welding, steel side welding, and butt welding; S203, after the electron beam welding is completed, samples are collected at the weld of the copper-steel composite material, wherein the sample collection includes basic area samples and characteristic area samples, 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; S204, 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 point.

4. The method for preparing the high-strength copper-steel bimetallic composite material according to claim 1, characterized in that: S3 uses an ultrasonic testing system to scan the weld of the copper-steel bimetallic composite material, wherein: S301, 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; S302, 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 transducer generating card, and the preamplifier is used to amplify the stress wave signal received by the receiving transducer and transmit it to the signal receiving card.

5. The method for preparing the high-strength copper-steel bimetallic composite material according to claim 1, characterized in that: The step S4 analyzes and processes the scanned image by a computer, wherein: S401, the computer uses a median filter to enhance the image, and estimates the error of the filter coefficient through the LMS adaptive filtering algorithm to update the coefficient value, as shown in formula (S4-1~S4-2): In the formula, 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; S402, the computer uses the Canny edge detection operator to extract the edge of the image after median filtering, and optimizes the edge details in the image by using the average variance and average gray value of the image as parameters of the high and low thresholds, as shown in formulas (S4-3~S4-5): In the formula, is the desired high threshold; represents the proportionality constant; is the average variance of the image; The average grayscale of 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 ; S403, after the image processing is completed, the computer analyzes whether the welding performance of the copper-steel bimetallic composite material meets the requirements according to 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.

6. The method for preparing the high-strength copper-steel bimetallic composite material according to claim 1, characterized in that: The S5 adopts a rolling composite method to perform secondary treatment on the copper-steel bimetallic composite material, wherein: S501, the rolling composite method includes a hot rolling composite method and a cold rolling composite method, and the hot rolling composite method and the cold rolling composite method of the rolling composite method are selected according to the hardness of the copper-steel bimetallic composite material; S502, 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.

7. The method for preparing the high-strength copper-steel bimetallic composite material according to claim 1, characterized in that: The S6 performs annealing treatment on the copper-steel bimetallic composite material, wherein: S601, the holding time of the annealing treatment of the copper-steel bimetallic composite material is 1.5 hours, and the temperature of the annealing treatment is divided into five nodes of 600, 650, 700, 750, and 800 degrees Celsius; S602, 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): In the formula, 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.

8. The method for preparing the high-strength copper-steel bimetallic composite material according to claim 1, characterized in that: S7 tests the performance of the high-strength copper-steel bimetallic composite material, wherein: S701, the performance test includes macroscopic performance analysis and microscopic structure analysis, the macroscopic performance analysis includes mechanical performance test and chemical performance test, and the microscopic structure analysis includes metal bonding state test and metal distribution state test; S702, the mechanical property test includes tensile test, shear test, wear resistance test, and hardness test, and the chemical property test includes corrosion resistance test and oxidation resistance test; S703, 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 interface shape, distribution area, and metal coverage, and the metal distribution state detection includes the number of holes, crack size, and cross-sectional defects.

9. The method for preparing the high-strength copper-steel bimetallic composite material according to claim 1, characterized in that: S8 stores the preparation data in the cloud via a computer, wherein: S801, the computer stores the sample data and experimental data of the composite material prepared this time to the cloud, and 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.

10. 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 1-9.

Images