An efficient preparation method for a textured reinforced metal / carbon fiber sandwich composite panel

Abstract

The invention discloses an efficient preparation method of a textured reinforced metal / carbon fiber sandwich composite plate. The method aims to solve the problem that, during the preparation of metal and carbon fiber composites, due to poor wettability of the interface between carbon fiber and metal, carbon fiber is very likely to generate brittle metal carbides with metal at high temperature, thereby reducing the bonding strength. The invention proposes placing the carbon fiber composite material in the middle of a folded metal plate for hot rolling, and by means of the light weight and high strength of the carbon fiber composite material and the functional characteristics of the metal material, forming a mesh structure flexible transition layer with textured metal as the skeleton and resin as the filler at the connection interface, thereby obtaining a structurally functional textured reinforced metal / carbon fiber sandwich composite plate. The processing process is simple, low in cost and high in efficiency, and can effectively solve the problem of low interface bonding strength and poor structural performance caused by sudden changes in the physical and chemical properties of the materials at the connection interface of dissimilar materials.

Description

Technical Field

[0001] The invention belongs to the technical field of composite plate processing and preparation, and in particular relates to a high-efficiency preparation method of a textured reinforced metal / carbon fiber sandwich composite plate. Background Art

[0002] Carbon fiber has the characteristics of high temperature resistance, friction resistance, thermal conductivity and corrosion resistance. It is fibrous, soft and can be processed into various fabrics. Carbon fiber has a low density, high specific strength and specific modulus. However, the impact toughness of carbon fiber composites is poor, especially the interlaminar impact toughness. Metal alloy plates have excellent strength and plastic toughness. In particular, some functional metal materials have more specific functions after being acted upon by light, electricity, heat, etc., such as the electric heating function of FeCrAl alloy high resistivity materials. The laminates prepared by the composite of metal and carbon fiber composites have the light weight, high strength and functional characteristics of both, and can be used in aerospace, automobiles, electronic instruments and civil appliances.

[0003] At present, the commonly used preparation processes for metal and carbon fiber composite laminates include hot pressing consolidation, hot pressing brazing and diffusion bonding. These methods often require a vacuum environment, the introduction of low-melting point eutectic alloys or adhesives, etc., and have the disadvantages of complex preparation process and high process precision requirements. Summary of the invention

[0004] In view of the problems of large difference in physical properties of metal and carbon fiber composite materials, poor wettability of the connection interface, complicated traditional preparation process and formation of brittle metal carbides during the current composite preparation and molding of the two, the present invention provides an efficient preparation method of a textured reinforced metal / carbon fiber sandwich composite panel, which is prepared by utilizing the textured structure and functionality of the metal material, and a flexible transition layer with textured metal as the skeleton and resin as the filler is formed at the connection interface, which has both the high toughness of the carbon fiber composite material and the high strength, corrosion resistance and other functional characteristics of the metal material.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An efficient preparation method for a textured reinforced metal / carbon fiber sandwich composite panel comprises the following steps:

[0007] Step 1, selecting thermoplastic carbon fiber composite plates and metal alloy plates of required sizes;

[0008] Step 2, cleaning the surfaces of the selected thermoplastic carbon fiber composite plates and metal alloy plates;

[0009] Step 3, performing a first surface reticulation rolling on the metal alloy plate to form a reticulation on the surface of the metal alloy plate;

[0010] Step 4, treating the surface of the metal alloy plate with a silane coupling agent;

[0011] Step 5, fold the treated metal alloy plate in half so that the textured surface is located on the inner side of the fold; reducing the number of rolling passes is conducive to ensuring the consistency of the textured structure and depth of the upper and lower metal plates. Compared with using two textured metal plates, folding the metal plate in half can reduce the number of rolling passes for preparing the laminate, ensure the consistency of the textured structure and depth of the upper and lower metal plates, and help maintain the consistency of the bonding strength between the upper and lower metal plates and the carbon fiber composite material.

[0012] Step 6, subjecting the metal alloy plate to vacuum heat treatment and heat preservation;

[0013] Step 7, placing the thermoplastic carbon fiber composite plate on the inner side of the folded metal alloy plate, so that the upper and lower surfaces of the thermoplastic carbon fiber composite plate are in contact with the textured surface on the inner side of the metal alloy plate, to obtain a combined plate;

[0014] Step 8, the combined plate is rolled for the second time to form a mesh structure flexible transition layer with mesh metal as the skeleton and resin as the filler at the connection interface, which means that a mesh reinforced metal / carbon fiber sandwich structure functional composite plate is obtained. The second rolling reduction is greater than the mesh depth to ensure that the contact surface between the metal mesh structure and the carbon fiber composite material is fully deformed to achieve a mechanical interlocking interface.

[0015] Furthermore, the specific method of using a silane coupling agent to treat the surface of the metal alloy plate in step 4 is: firstly put the metal alloy plate into clean water to produce a seamless water film, and then put it into the silane coupling agent to complete the surface treatment. The surface silane coupling agent treatment can enhance the bonding effect of the composite material.

[0016] Furthermore, the temperature of the vacuum heat treatment in step 6 is 180° C. to 190° C. The temperature is controlled below 200° C., which effectively prevents the generation of a brittle layer at the connection interface.

[0017] Furthermore, the rolling depth of the first surface check rolling is 0.05 mm±0.01 mm.

[0018] Furthermore, the reduction amount of the second rolling is 0.1 mm to 0.15 mm, and the reduction rate is 5% to 10%.

[0019] Furthermore, the metal alloy plate in step 1 includes stainless steel, titanium alloy, aluminum alloy and magnesium alloy.

[0020] Furthermore, the first pass of surface check rolling is specifically to make the upper roller and the lower roller rotate synchronously.

[0021] Furthermore, the upper roller and the lower roller of the second rolling process rotate synchronously.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The efficient preparation method of the textured reinforced metal / carbon fiber sandwich composite plate of the present invention can obtain a new type of structural functional composite plate with good interface bonding performance. The hot rolling forming preparation process is utilized, and the metal surface is textured to increase the connection area, enhance the mechanical bonding effect and metallurgical bonding strength; during the preparation process, the resin in the carbon fiber composite material enters the spatial textured structure to form a mesh-shaped flexible transition layer with the textured metal as the skeleton and the resin as the filler, which has both the high toughness of the resin and the high strength of the metal to obtain a structural functional composite plate; the temperature of the heating furnace is controlled to effectively prevent the metal and the carbon fiber from generating brittle metal carbides during rolling, thereby enhancing the bonding strength; at the same time, the metal surface is treated with a silane coupling agent to enhance the connection effect of the metal and carbon fiber dissimilar materials; compared with the preparation process of the traditional metal and carbon fiber composite composite laminate, this processing technology does not need to introduce eutectic alloys and adhesives, and has a simple process, low cost, and low process precision requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a process flow chart for the efficient preparation of the textured reinforced metal / carbon fiber sandwich composite panel of the present invention.

[0025] Figure 2 It is a front schematic diagram of the metal plate mesh structure of the present invention.

[0026] Figure 3 It is a schematic diagram of a metal plate after one-pass rolling according to the present invention.

[0027] Figure 4 It is a schematic diagram of the rolling equipment of the present invention.

[0028] Figure 5 It is a schematic diagram of the rolling process of the textured reinforced metal / carbon fiber sandwich composite plate of the present invention.

[0029] Figure 6 This is the morphology of the connection interface of the reticulated reinforced metal / carbon fiber sandwich composite panel obtained by two-pass rolling forming.

[0030] In the figure: 1: frame; 2: upper roller; 3: lower roller; 4: motor; 5: adjustment handle; 6: bearing seat; 7: rotating shaft; 8: coupling; 9: feeding platform; 10: upper side metal; 11: thermoplastic carbon fiber composite material plate; 12: lower side metal. DETAILED DESCRIPTION

[0031] The specific implementation modes of the present invention are further described below.

[0032] The invention provides an efficient preparation process for a textured reinforced metal / carbon fiber sandwich composite plate, which utilizes a rolling composite plate process to first roll a textured structure on a metal surface, and then roll the textured reinforced metal / carbon fiber sandwich composite plate.

[0033] (I) Material selection: Select thermoplastic carbon fiber composite plates and metal alloy plates (including stainless steel, titanium alloy, aluminum alloy and magnesium alloy). Thermoplastic carbon fiber composite plates are cut to a thickness of 1mm, a width of 50mm and a length of 150mm; metal plates are cut to a thickness of 0.5mm, a width of 50mm and a length of 300mm. Through the selection of functional metal materials and the processing of the reticular structure, a new type of structural functional composite plate can be prepared.

[0034] (ii) Material surface cleaning: Grind the metal plate to remove the surface oxide film, and use anhydrous ethanol cleaning fluid to clean the metal plate and carbon fiber plate to remove surface impurities.

[0035] (III) One-pass metal plate surface reticulation rolling: using a roller with a reticulated surface, the upper and lower rollers rotate synchronously, and the metal plate surface is reticulated through rolling under a small rolling force load.

[0036] (IV) Silane coupling agent treatment on metal surface: Put the metal plate into clean water to produce a seamless water film, and then put it into the silane treatment agent to complete the surface silane coupling agent treatment. Surface silane coupling agent treatment can enhance the bonding effect of composite materials.

[0037] (V) Fold the surface treated metal plate in half, with the textured surface on the inside. Compared with using two textured metal plates, folding the metal plate in half can reduce the number of rolling times for preparing the laminate, ensure the consistency of the texture structure and depth of the upper and lower metal plates, and help maintain the consistency of the bonding strength between the upper and lower metal plates and the carbon fiber composite material.

[0038] (6) Metal plate heating: Heat the metal plate to 180℃~190℃ in a vacuum heat treatment furnace and keep warm.

[0039] (VII) Composite plate: The thermoplastic carbon fiber composite material is placed inside the metal plate in contact with the textured surface.

[0040] (VIII) Two-pass rolling forming: Use smooth rollers to roll the combined plate, and the upper and lower rollers rotate synchronously. Roll the combined plate through the rollers under a large rolling force load to obtain a functional composite plate with a mesh-reinforced metal / carbon fiber sandwich structure with a good connection interface. The second-pass rolling reduction is greater than the mesh depth to ensure that the contact surface between the metal mesh structure and the carbon fiber composite material is fully deformed to achieve a mechanical interlocking interface.

[0041] (IX) Testing and analysis: Testing and analysis of the bonding strength and morphology of the connection interface of the functional composite panel of the textured reinforced metal / carbon fiber sandwich structure obtained.

[0042] Conclusion: Under the rolled composite material preparation method, the functional composite plate of the textured reinforced metal / carbon fiber sandwich structure has good bonding strength; a flexible transition layer with textured metal as the skeleton and resin as the filler can be formed at the connection interface, which has both the high toughness of the resin and the high strength of the metal; the temperature is controlled below 200°C, which effectively prevents the formation of a brittle layer at the connection interface; the texture processing of the metal surface and the silane coupling agent treatment greatly improve the bonding effect of metal and carbon fiber dissimilar materials; compared with the preparation process of traditional metal and carbon fiber composite composite laminates, this processing process is simple, low-cost, and has low process precision requirements.

[0043] The technical solution of the present invention is further described below in conjunction with embodiments.

[0044] Example 1

[0045] This experimental example takes aluminum alloy and carbon fiber reinforced nylon (CF-PA) as examples to further illustrate an efficient preparation method for a textured reinforced metal / carbon fiber sandwich composite panel.

[0046] The specific preparation steps of aluminum alloy / CF-PA are as follows.

[0047] Step 1. Material selection: Select CF-PA as the carbon fiber type, and 5052 aluminum alloy as the metal backing plate. Cut the CF-PA plate with a thickness of 1mm, a width of 50mm, and a length of 150mm; cut the aluminum alloy plate with a thickness of 0.5mm, a width of 50mm, and a length of 300mm.

[0048] Step 2: Clean the surface of aluminum alloy and CF-PA sheet: Grind the surface of aluminum alloy sheet to remove the surface oxide layer; Use anhydrous ethanol cleaning fluid to scrub the surface of aluminum alloy and CF-PA sheet to remove surface impurities.

[0049] Step 3, one-pass reticulated rolling of the aluminum alloy plate surface: using a roller with a surface reticulated surface, the upper roller (2) and the lower roller (3) rotate synchronously, the roller linear speed is 10m / min, and the aluminum alloy plate surface reticulated surface is processed by rolling under a small rolling force load, and the reticulated surface depth is 0.05mm±0.01mm.

[0050] Step 4: Silane coupling agent treatment on the surface of the aluminum alloy plate: first put the aluminum alloy plate in clean water to produce a seamless water film on the surface of the aluminum alloy plate, and then put it in the silane treatment agent to complete the surface silane coupling agent treatment. Silane coupling agent treatment on the surface of the aluminum alloy plate can enhance the bonding effect of the composite material.

[0051] Step 5. Fold the metal plate in half: Fold the surface-treated aluminum alloy plate in half with the textured surface on the inside.

[0052] Step 6. Heating the aluminum alloy plate: Heat the aluminum alloy plate to 180°C in a vacuum heat treatment furnace and keep warm.

[0053] Step 7, assembling the plates: placing the CF-PA plate (11) inside the aluminum alloy plate, in contact with the textured surfaces of the upper aluminum plate (10) and the lower aluminum plate (12).

[0054] Step 8, two-pass rolling forming: Use a smooth-surfaced roller to roll the combined plate, the upper roller (2) and the lower roller (3) rotate synchronously at a speed of 12m / min, and roll the combined plate by the rollers under a large rolling force load to obtain an aluminum alloy / CF-PA composite plate with a good connection interface. The second-pass rolling reduction is greater than the mesh depth, the reduction is 0.1mm to 0.15mm, and the reduction rate is 5% to 10%, to ensure that the mesh structure of the aluminum alloy plate and the contact surface of the CF-PA plate are fully deformed to achieve a mechanical interlocking interface.

[0055] Step 9, detection and analysis: Test and analyze the bonding strength and morphology of the connection interface of the obtained aluminum alloy / CF-PA composite plate, and use a scanning electron microscope to analyze the morphology of the two-pass connection interface of the rolled composite material; use an electronic universal testing machine to test the interface bonding strength of the obtained aluminum alloy / CF-PA composite plate.

[0056] Conclusion: Under the preparation method of the textured reinforced metal / carbon fiber sandwich composite panel, with the help of the textured structure and material properties of the aluminum alloy, a mesh aluminum alloy / PA flexible transition layer can be formed at the connection interface to obtain a functional structural 5052 aluminum alloy / CF-PA composite panel with good bonding strength; the temperature is controlled below 200°C to effectively prevent the formation of the Al4C3 brittle layer at the connection interface; the textured processing on the surface of the aluminum alloy plate and the silane coupling agent treatment greatly improve the bonding effect of the aluminum alloy and the CF-PA plate; the shear strength reaches 23.6MPa.

[0057] Example 2

[0058] This experimental example takes stainless steel and carbon fiber reinforced nylon (CF-PA) as examples to further illustrate an efficient preparation method for a textured reinforced metal / carbon fiber sandwich composite panel.

[0059] The specific preparation steps of stainless steel / CF-PA are as follows.

[0060] Step 1: Material selection: Select CF-PA as the carbon fiber type, FeCrAl stainless steel as the metal backing plate, and cut the CF-PA plate to 1mm thick, 50mm wide, and 150mm long; cut the stainless steel plate to 0.5mm thick, 50mm wide, and 300mm long. With the functional characteristics of FeCrAl stainless steel, a new structural functional composite plate with light weight, high toughness, corrosion resistance, and high resistivity can be prepared.

[0061] Step 2: Clean the surface of stainless steel and CF-PA plates: Grind the surface of the stainless steel plate to remove the surface oxide layer; use anhydrous ethanol cleaning fluid to scrub the surface of the stainless steel and CF-PA plates to remove surface impurities.

[0062] Step 3, one-pass surface reticulation rolling of the stainless steel plate: using a roller with surface reticulation, the upper roller and the lower roller rotate synchronously, the roller linear speed is 10m / min, and the stainless steel plate surface reticulation is processed by rolling under a small rolling force load, and the reticulation depth is 0.05mm±0.01mm.

[0063] Step 4: Silane coupling agent treatment on the surface of the stainless steel plate: first put the stainless steel plate in clean water to produce a seamless water film on the surface of the stainless steel plate, and then put it in the silane treatment agent to complete the surface silane coupling agent treatment. Silane coupling agent treatment on the surface of the stainless steel plate can enhance the bonding effect of the composite material.

[0064] Step 5. Fold the metal plate in half: Fold the surface-treated stainless steel plate in half with the textured surface on the inside.

[0065] Step 6. Heating the stainless steel plate: Heat the stainless steel plate to 180°C in a vacuum heat treatment furnace and keep warm.

[0066] Step 7. Combine the plates: Place the CF-PA plate inside the stainless steel plate, in contact with the textured surfaces of the upper and lower stainless steel plates.

[0067] Step 8, two-pass rolling forming: Use smooth rollers to roll the stainless steel / CF-PA composite plate. The upper roller and the lower roller rotate synchronously at a speed of 12m / min. Roll the composite plate with a large rolling force load to obtain a stainless steel / CF-PA composite plate with a good connection interface. The second-pass rolling reduction is greater than the mesh depth, the reduction is 0.1mm to 0.15mm, and the reduction rate is 5% to 10%, ensuring that the mesh structure of the stainless steel plate and the contact surface of the CF-PA plate are fully deformed to achieve a mechanical interlocking interface.

[0068] Step 9, testing and analysis: Test and analyze the bonding strength and morphology of the stainless steel / CF-PA composite plate connection interface. Use a scanning electron microscope to analyze the morphology of the composite material connection interface; Use an electronic universal testing machine to test the bonding strength of the stainless steel / CF-PA composite plate interface.

[0069] Conclusion: The prepared FeCrAl stainless steel / CF-PA composite sheet has good bonding strength and forms a mesh stainless steel / PA flexible transition layer at the connection interface. It is a new type of structural functional composite material, which has the light weight and high strength of carbon fiber composite materials and the high strength, toughness, corrosion resistance and high resistivity of FeCrAl stainless steel. The mesh processing on the surface of the stainless steel plate and the silane coupling agent treatment greatly improve the bonding effect of stainless steel and CF-PA plate. The shear strength reaches 20.3MPa.

[0070] Comparative Example 1

[0071] In this comparative example, no coupling agent treatment and no reticulation processing were performed to prepare an aluminum alloy / carbon fiber reinforced nylon (CF-PA) composite plate, which specifically includes the following process.

[0072] The specific preparation steps of aluminum alloy / CF-PA are as follows.

[0073] Step 1. Material selection: Select CF-PA as the carbon fiber type, and 5052 aluminum alloy as the metal backing plate. Cut the CF-PA plate with a thickness of 1mm, a width of 50mm, and a length of 150mm; cut the aluminum alloy plate with a thickness of 0.5mm, a width of 50mm, and a length of 300mm.

[0074] Step 2: Clean the surface of aluminum alloy and CF-PA sheet: Grind the surface of aluminum alloy sheet to remove the surface oxide layer; Use anhydrous ethanol cleaning fluid to scrub the surface of aluminum alloy and CF-PA sheet to remove surface impurities.

[0075] Step 3: Heating the aluminum alloy plate: Heat the aluminum alloy plate to 180°C in a vacuum heat treatment furnace and keep warm.

[0076] Step 4: Combine the plates: Place the CF-PA plate between the upper and lower aluminum alloy plates, so that the CF-PA plate is in close contact with the upper and lower aluminum plates.

[0077] Step 5, rolling forming: Use smooth rollers to roll the combined plate. The upper roller and the lower roller rotate synchronously at a speed of 10m / min. The combined plate is rolled by the rollers under a large rolling force load to obtain an aluminum alloy / CF-PA composite plate with a good connection interface. The reduction amount is 0.1mm~0.15mm, and the reduction rate is 5%~10%.

[0078] Step 6. Testing and analysis: Test and analyze the bonding strength and morphology of the aluminum alloy / CF-PA composite plate interface. Use a scanning electron microscope to analyze the morphology of the two-pass connection interface of the rolled composite material. Use an electronic universal testing machine to test the bonding strength of the aluminum alloy / CF-PA composite plate interface.

[0079] Conclusion: The shear strength of the 5052 / CF-PA laminated plate without surface treatment is 15.5MPa; compared with the untreated joints, the connection joints obtained after coupling agent treatment and reticulation processing have increased a lot of mechanical locking effect and have good bonding strength; the silane coupling agent treatment on the surface of the aluminum alloy plate is beneficial to the formation of chemical bonding and greatly improves the bonding effect between the aluminum alloy and the CF-PA plate.

[0080] Comparative Example 2

[0081] The eutectic alloy powder commonly used in the traditional hot pressing method is used to replace the coupling agent used in the present invention to enhance the connection effect of the aluminum alloy / carbon fiber composite material, which specifically includes the following process.

[0082] Step 1: Select carbon fiber cloth and 5052 aluminum alloy plate as materials. Cut the carbon fiber cloth with a thickness of 0.25mm, a width of 50mm and a length of 150mm; cut two aluminum alloy plates with a thickness of 0.5mm, a width of 50mm and a length of 150mm.

[0083] Step 2: Clean the surface of aluminum alloy and carbon fiber cloth: Grind the surface of aluminum alloy plate to remove the surface oxide layer; use anhydrous ethanol cleaning solution to scrub the surface of aluminum alloy and carbon fiber cloth to remove surface impurities.

[0084] Step 3: A single pass of aluminum alloy plate surface reticulation rolling: Use a roller with surface reticulation, the upper roller and the lower roller rotate synchronously, the roller linear speed is 10m / min, and the aluminum alloy plate surface reticulation is processed by rolling under a small rolling force load, and the reticulation depth is 0.05mm±0.01mm. According to this process step, the reticulation structure is processed on one side of the two aluminum alloy plates.

[0085] Step 4: Assembly: Evenly spray a thin layer of magnesium-zinc-aluminum eutectic alloy powder on the textured side of the aluminum alloy plate; place the carbon fiber cloth on the magnesium-zinc-aluminum eutectic alloy powder; continue to evenly spray a thin layer of magnesium-zinc-aluminum eutectic alloy powder on the carbon fiber cloth; place another aluminum alloy plate on the eutectic alloy powder so that the textured surface fits tightly with the eutectic alloy powder to complete the assembly of the aluminum alloy / carbon fiber laminate.

[0086] Step 5: Heating the composite board: Place the aluminum alloy / carbon fiber composite board in a vacuum heat treatment furnace, heat it to 360°C, and keep it warm.

[0087] Step 6, rolling forming: Use smooth rollers to roll the combined plate. The upper roller and the lower roller rotate synchronously at a speed of 10m / min. The combined plate is rolled by the rollers under a large rolling force load to obtain an aluminum alloy / carbon fiber composite plate with a good connection interface. The reduction amount is 0.06mm~0.12mm, and the reduction rate is 5%~10%.

[0088] Step 6. Testing and analysis: Testing and analyzing the bonding strength and morphology of the aluminum alloy / carbon fiber composite plate interface. Using a scanning electron microscope to analyze the morphology of the composite plate interface. Using an electronic universal testing machine to test the bonding strength of the aluminum alloy / carbon fiber composite plate interface.

[0089] Conclusion: The shear strength of the 5052 / CF-PA composite plate obtained by rolling the eutectic alloy powder is 19.7 MPa. Compared with the method of preparing the metal / carbon fiber composite plate by rolling the eutectic alloy, the thermoplastic resin matrix in the method of the present invention plays the role of the eutectic alloy and the adhesive in the traditional preparation process. Therefore, directly using carbon fiber reinforced thermoplastic composite materials instead of carbon fiber cloth can greatly simplify the preparation process, and there is no need to additionally apply resin adhesive or spray eutectic alloy powder between the metal and the carbon fiber.

[0090] The test results of the embodiments and comparative examples are shown in Table 1.

[0091] Table 1 Test results

[0092]

[0093] From the data comparison in Table 1, it can be seen that after the composite regulation of coupling agent and reticulation processing, the shear strength of the rolled Al / CFRTP composite plate is increased from 15.5MPa to 23.6MPa; the joint prepared by using eutectic alloy powder instead of coupling agent and resin also has good shear strength, but the preparation process is more complicated.

[0094] The contents not described in detail in the specification of the present invention belong to the prior art known to the professional and technical personnel in the field. Although the illustrative specific embodiments of the present invention are described above to facilitate the understanding of the present invention by the technical personnel in the field, it should be clear that the present invention is not limited to the scope of the specific embodiments. For ordinary technicians in the field of this technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

Claims

1. An efficient preparation method for a textured reinforced metal / carbon fiber sandwich composite panel, characterized in that: The following steps are involved: Step 1, selecting thermoplastic carbon fiber composite plates and metal alloy plates of required sizes; Step 2, cleaning the surfaces of the selected thermoplastic carbon fiber composite plates and metal alloy plates; Step 3, performing a first surface reticulation rolling on the metal alloy plate to form a reticulated metal skeleton on the surface of the metal alloy plate; Step 4, treating the surface of the metal alloy plate with a silane coupling agent; Step 5, folding the treated metal alloy plate in half so that the textured surface is located on the inner side of the fold; Step 6, subjecting the metal alloy plate to vacuum heat treatment and heat preservation; Step 7, placing the thermoplastic carbon fiber composite plate on the inner side of the folded metal alloy plate, so that the upper and lower surfaces of the thermoplastic carbon fiber composite plate are in contact with the textured surface on the inner side of the metal alloy plate, to obtain a combined plate; Step 8, rolling the combined plate for the second time to form a flexible transition layer with a mesh structure having a textured metal skeleton and resin as filler at the connection interface, which means that a functional composite plate with a textured reinforced metal / carbon fiber sandwich structure is obtained.

2. The method for efficiently preparing a textured reinforced metal / carbon fiber sandwich composite panel according to claim 1, characterized in that: The specific method of using a silane coupling agent to treat the surface of the metal alloy plate in step 4 is: firstly put the metal alloy plate into clean water to produce a seamless water film, and then put it into the silane coupling agent to complete the surface treatment.

3. The efficient preparation method of a textured reinforced metal / carbon fiber sandwich composite panel according to claim 1, characterized in that: The temperature of the vacuum heat treatment in step 6 is 180°C to 190°C.

4. The method for efficiently preparing a textured reinforced metal / carbon fiber sandwich composite panel according to claim 1, characterized in that: The rolling depth of the first surface mesh rolling is 0.05 mm±0.01 mm.

5. The efficient preparation method of a textured reinforced metal / carbon fiber sandwich composite panel according to claim 1, characterized in that: The second rolling process has a reduction amount of 0.1 mm to 0.15 mm, and a reduction rate of 5% to 10%.

6. The method for efficiently preparing a textured reinforced metal / carbon fiber sandwich composite panel according to claim 1, characterized in that: The metal alloy plate in step 1 includes stainless steel, titanium alloy, aluminum alloy and magnesium alloy.

7. The method for efficiently preparing a textured reinforced metal / carbon fiber sandwich composite panel according to claim 1, characterized in that: The first pass of surface check rolling is specifically to make the upper roller and the lower roller rotate synchronously.

8. The method for efficiently preparing a textured reinforced metal / carbon fiber sandwich composite panel according to claim 1, characterized in that: The upper roller and the lower roller of the second rolling pass rotate synchronously.

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