High interfacial bonding strength titanium / aluminum composite material and rolling composite forming method

Abstract

A rolling composite forming method of high interfacial bonding strength titanium / aluminum composite material belongs to the technical field of metal layered composite material preparation. The method comprises the following steps: respectively performing softening annealing treatment on a titanium plate and an aluminum plate; performing surface nanocrystallization treatment on a surface of a titanium plate to be compounded to construct a gradient nanocrystalline structure layer; performing surface mechanical polishing treatment on a surface of an aluminum plate to be compounded; assembling the titanium plate and the aluminum plate to obtain a titanium / aluminum assembly; performing single-pass rolling pre-composite on the titanium / aluminum assembly to obtain a titanium / aluminum pre-composite plate blank; performing single-pass hot rolling final composite on the titanium / aluminum pre-composite plate blank to obtain a titanium / aluminum composite plate blank; and air cooling the titanium / aluminum composite plate blank to room temperature to obtain a titanium / aluminum composite material. According to the technical scheme, the surface of the titanium plate to be compounded can be cracked at a lower pressure, and the diffusion driving force of interfacial atoms is increased, thereby providing a new method for preparing high interfacial bonding strength high-performance titanium / aluminum composite material.

Description

Technical Field

[0001] This invention belongs to the field of metal layered composite material preparation technology, specifically relating to a high interfacial bonding strength titanium / aluminum composite material and a rolling composite forming method. Background Technology

[0002] Titanium / aluminum composites combine the advantages of titanium, such as high specific strength, corrosion resistance, and high temperature resistance, with aluminum, such as low density and low cost. They are structural-functional integrated metal layered composite materials with excellent comprehensive performance and are widely used in aerospace, rail transportation, construction and chemical industry, national defense and military industry, and consumer goods.

[0003] Currently, the main methods for preparing titanium / aluminum composites are explosive bonding and rolling bonding. Explosive bonding utilizes the immense impact force and heat generated by an explosion to achieve a strong metallurgical bond between the titanium and aluminum interfaces. However, explosive bonding suffers from problems such as uneven coating thickness, poor surface quality, significant environmental pollution, and the limitation to producing only thick titanium / aluminum plates, making it unsuitable for continuous production of large-size, high-volume titanium / aluminum composites. Rolling bonding offers advantages such as simple process, high production efficiency, safety, environmental friendliness, the ability to produce wide strips and plates, and continuous mass production, making it a promising direction for the green forming of titanium / aluminum composites. However, due to the significant differences in the physical and mechanical properties of titanium and aluminum, in traditional rolling bonding processes, the deformation between titanium and aluminum is uncoordinated. The difficulty in deforming the titanium side leads to low cracking of the hardened layer on the surface to be bonded, insufficient exposure of fresh metal on the titanium side, and insufficient metal embedding on the aluminum side, resulting in low interfacial bonding strength in the titanium / aluminum composite. Therefore, improving the cracking degree of the titanium surface to be bonded and increasing the interfacial bonding area between the dissimilar metals titanium and aluminum during the rolling bonding process is crucial for obtaining titanium / aluminum composites with high interfacial bonding strength.

[0004] Currently, to promote cracking on the composite surface of the difficult-to-deform metal component layers, researchers have used methods such as oxidation, carburizing, nitriding, or hydrogenation to modify the surface of the component metals to make them embrittled. While increasing the thickness of the embrittled layer can effectively promote cracking on the composite surface of the component metals during the rolling composite process, the introduced elements such as O and N can hinder the contact and element diffusion of fresh metal at the interface of the component metal layers. Moreover, the brittle compounds formed by the foreign elements and the base metal are distributed at the interface of the metal layered composite material, which will reduce the interfacial properties of the metal layered composite material. In addition, surface modification methods such as oxidation, carburizing, nitriding, or hydrogenation are usually carried out at high temperatures for a long time, which not only induces grain growth but also increases production costs and process complexity, making them unsuitable for large-scale application.

[0005] Therefore, it is of great significance to develop a new method for surface pretreatment and rolling composite forming of titanium / aluminum composite materials with short process, high efficiency and low cost to obtain high-performance titanium / aluminum composite materials with high interfacial bonding strength. Summary of the Invention

[0006] The purpose of this invention is to address the challenges of low surface cracking and low interfacial bonding strength in the traditional rolling composite forming method for preparing titanium / aluminum composites. This invention combines a surface self-nanoification treatment method with the rolling composite process to provide a titanium / aluminum composite material with high interfacial bonding strength and a rolling composite forming method. Compared to traditional surface pretreatment methods for titanium plates, the surface self-nanoification treatment method only alters the mechanical properties of the surface, without changing the chemical composition, to obtain a surface gradient nanocrystalline structure layer with a certain thickness, hardness, and roughness. The titanium plate surface modified by the surface self-nanoification treatment method can crack at a lower reduction and increases the diffusion driving force of interfacial atoms, providing a new method for preparing high-performance titanium / aluminum composites with high interfacial bonding strength.

[0007] According to a first aspect of the technical solution of the present invention, a method for rolling and forming high interfacial bonding strength titanium / aluminum composite materials is disclosed, characterized by comprising the following steps:

[0008] Step 1: Perform softening annealing treatment on the titanium plate and aluminum plate respectively;

[0009] Step 2: Perform surface self-nanoization treatment on the titanium plate to be composited after Step 1, and construct a gradient nanocrystalline structure layer with specific morphology, roughness, hardness and thickness on the titanium plate to be composited surface; perform surface mechanical polishing treatment on the aluminum plate to be composited surface after Step 1.

[0010] Step 3: Assemble the titanium plate and the aluminum plate processed in Step 2 to obtain a titanium / aluminum preform;

[0011] Step 4: Perform single-pass rolling pre-composite processing on the titanium / aluminum billet to obtain a titanium / aluminum pre-composite slab;

[0012] Step 5: Perform single-pass hot rolling final composite on the titanium / aluminum pre-composite slab to obtain a titanium / aluminum composite slab;

[0013] Step 6: Air-cool the titanium / aluminum composite slab to room temperature to obtain the titanium / aluminum composite material.

[0014] Furthermore, in step 1, the titanium plate and the aluminum plate are sheet or roll materials, the titanium plate is made of at least one of pure titanium or titanium alloy, and the aluminum plate is made of at least one of pure aluminum or aluminum alloy.

[0015] Furthermore, in step 1, the heating temperature for the softening annealing treatment of the titanium plate is 650–850°C, the holding time is 30–120 min, and the cooling method is air cooling; the heating temperature for the softening annealing treatment of the aluminum plate is 400–500°C, the holding time is 30–120 min, and the cooling method is air cooling.

[0016] Furthermore, in step 2, the method for surface nano-processing of the titanium plate is at least one of the following: surface mechanical grinding, mechanical shot peening, ultrasonic shot peening, supersonic particle bombardment, laser impact, ultrasonic impact, rapid multi-rotation rolling, deep surface rolling, ultrasonic rolling, or high-pressure surface rolling.

[0017] Further, in step 2, the thickness of the gradient nanocrystalline structure layer is 0.01–150 μm, the roughness is 0.1–10 μm, the grain size of the gradient nanocrystals is 1–100 nm, the hardness is 5%–300% higher than that of the substrate, and the specific morphology is at least one of mirror-like, corrugated, grooved, crater-like, or mesh-like.

[0018] Furthermore, in step 2, the surface mechanical polishing treatment of the aluminum plate is at least one of sandpaper polishing, louver polishing, wire brush polishing, grinding wheel polishing, diamond grinding wheel polishing, or laser polishing.

[0019] Furthermore, in step 3, the titanium / aluminum preform is a 2-10 layer titanium / aluminum laminate preform or a titanium / aluminum / titanium laminate preform.

[0020] Furthermore, in step 4, the rolling speed is <0.2m / s, the rolling reduction rate is 10% to 50%, and the rolling temperature is room temperature to 250℃.

[0021] Furthermore, in step 5, the heating equipment used for the single-pass hot rolling final composite is a single-temperature zone heating equipment or a multi-temperature zone heating equipment, an offline heating equipment or an online heating equipment, and the heating method is at least one of flame heating, induction heating, radiation heating, pulse heating, resistance heating or laser heating.

[0022] Furthermore, in step 6, the rolling temperature is 350–450°C, the heating time is 5–30 min, the rolling speed is <0.2 m / s, and the rolling reduction rate is 10%–50%.

[0023] Furthermore, the rolling composite forming method is continuous or intermittent, and the titanium / aluminum composite material is subsequently subjected to diffusion annealing and straightening.

[0024] According to a second aspect of the present invention, a high interfacial bonding strength titanium / aluminum composite material is provided, wherein the high interfacial bonding strength titanium / aluminum composite material is prepared by the method described in any of the above aspects.

[0025] The beneficial effects of this invention are:

[0026] 1. The present invention provides a high interfacial bonding strength titanium / aluminum composite material rolling composite forming method, which addresses the problems of insufficient cracking on the titanium plate surface to be composited and low interfacial bonding strength in the traditional rolling composite forming preparation of titanium / aluminum composite materials. It combines the surface self-nano-treatment method with the rolling composite process. By controlling the morphology, roughness, hardness and gradient nanocrystalline structure layer thickness of the titanium plate surface to be composited, a better option is provided for the reasonable and organic coordination and matching of the physical property parameters between the titanium plate and aluminum plate surfaces to be composited. The titanium plate surface to be composited can initiate and propagate cracks at a lower rolling reduction rate, which helps the metallic aluminum to embed into the titanium side cracks, thereby increasing the interfacial bonding area and obtaining a titanium / aluminum composite material with high interfacial bonding strength.

[0027] 2. The present invention provides a high interfacial bonding strength titanium / aluminum composite rolling composite forming method. By constructing a gradient nanocrystalline structure layer on the surface of the titanium plate to be composited, a rapid channel for atomic diffusion is provided for subsequent heating and hot rolling. The diffusion of titanium and aluminum atoms can be achieved at a lower temperature, avoiding the reaction at the titanium / aluminum interface to generate intermetallic compounds that are detrimental to high interfacial bonding strength. This solves the problem that it is difficult to obtain high interfacial bonding strength titanium / aluminum composite materials by traditional hot rolling composite forming (which requires high temperature and long heating time) or cold rolling composite forming (which requires long diffusion heat treatment afterward).

[0028] 3. The gradient nanocrystalline structure layer at the composite interface of the titanium / aluminum composite exhibits a "synergistic strengthening" effect with the coarse-grained layer of the titanium plate matrix and the titanium / aluminum composite interface, respectively. This suppresses the initiation and propagation of cracks at the interface of the titanium / aluminum composite during subsequent deep processing, thereby further improving the strength and toughness of the titanium / aluminum composite.

[0029] 4. The high interfacial bonding strength titanium / aluminum composite rolling composite forming method of the present invention can be carried out directly in an atmospheric environment. The process is simple, the production efficiency is high, the rolling force requirements of the equipment can be reduced, energy saving and consumption reduction are achieved, the production cost is low, and the prepared titanium / aluminum composite material has higher interfacial bonding strength and better comprehensive performance. Attached Figure Description

[0030] Figure 1 This is a flowchart of a high-interfacial-bonding-strength titanium / aluminum composite rolling and forming method according to the technical solution of the present invention;

[0031] Figure 2The interface morphology of the titanium / aluminum composite material prepared according to Example 1 is shown.

[0032] Figure 3 The image shows the interface morphology of the titanium / aluminum composite material prepared according to Comparative Example 1. Detailed Implementation

[0033] The present invention will be described in detail below with reference to the embodiments. It should be noted that the following embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Those skilled in the art can make non-essential improvements and adjustments based on the content of the present invention.

[0034] The present invention provides a method for rolling and forming high interfacial bonding strength titanium / aluminum composite materials, such as... Figure 1 As shown, it includes the following steps:

[0035] Step 101: Perform softening annealing treatment on the titanium plate and aluminum plate respectively;

[0036] Step 102: Perform surface self-nanoization treatment on the titanium plate to be composited, and construct a gradient nanocrystalline structure layer with specific morphology, roughness, hardness and thickness on the titanium plate to be composited surface; perform surface mechanical polishing treatment on the aluminum plate to be composited surface.

[0037] Step 103: Assemble the titanium plate and aluminum plate offline or online to obtain a titanium / aluminum billet;

[0038] Step 104: Perform single-pass pre-composite rolling on the titanium / aluminum billet, with a rolling speed of <0.2m / s, a rolling reduction of 10% to 50%, and a rolling temperature of room temperature to 250℃ to obtain a titanium / aluminum pre-composite slab;

[0039] Step 105: Perform single-pass hot rolling final composite on the titanium / aluminum pre-composite slab. The rolling temperature is 350-450℃, the heating time is 5-30 min, the rolling speed is <0.2 m / s, and the rolling reduction rate is 10%-50%, to obtain the titanium / aluminum composite slab.

[0040] Step 106: Air-cool the titanium / aluminum composite slab to room temperature to obtain the titanium / aluminum composite material.

[0041] Furthermore, the titanium plate and aluminum plate are in the form of single sheet or coil, the titanium plate is made of at least one of pure titanium or titanium alloy, and the aluminum plate is made of at least one of pure aluminum or aluminum alloy.

[0042] Furthermore, the softening annealing treatment of titanium plates is carried out at a heating temperature of 650–850℃, a holding time of 30–120 min, and air cooling; the softening annealing treatment of aluminum plates is carried out at a heating temperature of 400–500℃, a holding time of 30–120 min, and air cooling.

[0043] Furthermore, the method for surface nano-processing of titanium plates includes at least one of the following: surface mechanical grinding, mechanical shot peening, ultrasonic shot peening, supersonic particle bombardment, laser impact, ultrasonic impact, rapid multi-rotation rolling, deep surface rolling, ultrasonic rolling, or high-pressure surface rolling.

[0044] Furthermore, the gradient nanocrystalline structure layer has a thickness of 0.01–150 μm, a roughness of 0.1–10 μm, a grain size of 1–100 nm, and a hardness that is 5%–300% higher than that of the substrate. The specific morphology is at least one of mirror-like, corrugated, grooved, crater-like, or mesh-like.

[0045] Furthermore, the surface mechanical polishing treatment of the aluminum plate is at least one of sandpaper polishing, louver polishing, wire brush polishing, grinding wheel polishing, diamond grinding wheel polishing, or laser polishing.

[0046] Furthermore, the titanium / aluminum preform is a 2-10 layer titanium / aluminum laminate preform or a titanium / aluminum / titanium laminate preform.

[0047] Furthermore, the heating equipment used for single-pass hot rolling final composite is a single-temperature zone heating equipment or a multi-temperature zone heating equipment, an offline heating equipment or an online heating equipment, and the heating method is at least one of flame heating, induction heating, radiation heating, pulse heating, resistance heating or laser heating.

[0048] Furthermore, the rolling composite forming method is continuous or intermittent, followed by diffusion annealing and straightening of the titanium / aluminum composite material.

[0049] The present invention also provides a high interfacial bonding strength titanium / aluminum composite material, which is prepared by the method described in any of the above aspects.

[0050] Example 1:

[0051] Titanium / aluminum composite materials were prepared using a single sheet of TA1 pure titanium with a thickness of 1 mm and a single sheet of 6061 aluminum alloy with a thickness of 3 mm as raw materials.

[0052] Step 1: Perform softening annealing treatment on TA1 pure titanium plate and 6061 aluminum alloy plate respectively. The softening annealing temperature of TA1 pure titanium plate is 750℃ and the holding time is 30min. The softening annealing temperature of 6061 aluminum alloy plate is 450℃ and the holding time is 60min.

[0053] Step 2: The TA1 pure titanium plate to be composited is subjected to ultrasonic shot peening to remove surface contaminants and oxide layers while constructing a gradient nanocrystalline structure layer with a certain roughness and thickness. The shot peening time is 60s, the shot diameter is 3mm, and the amplitude is 40μm. The 6061 aluminum alloy to be composited is ground with a grinding wheel to remove the surface oxide layer and contaminants, and obtain a clean and rough surface to be composited.

[0054] Step 3: Stack the TA1 pure titanium plate and 6061 aluminum alloy plate after surface pretreatment in an up-down stacking manner to obtain the TA1 / 6061 billet.

[0055] Step 4: The TA1 / 6061 billet is subjected to single-pass rolling composite at room temperature with a rolling speed of 0.04 m / s and a rolling reduction rate of 45% to obtain the TA1 / 6061 pre-composite slab.

[0056] Step 5: After holding the TA1 / 6061 pre-composite slab at 400℃ for 10 minutes in an air atmosphere holding furnace, immediately perform single-pass hot rolling final composite rolling at a rolling speed of 0.04m / s and a rolling reduction rate of 25% to obtain the TA1 / 6061 composite slab.

[0057] Step Six: Air-cool the TA1 / 6061 composite slab to room temperature to obtain a titanium / aluminum composite material with high interfacial bonding strength. This titanium / aluminum composite material exhibits significant cracking on the titanium side of the interface. The cracks are relatively uniformly distributed along the interface, with considerable width and depth. Metallic aluminum is embedded in the cracks on the titanium side, resulting in a "jawy" morphology at the interface. Figure 2 As shown.

[0058] Example 2:

[0059] Titanium / aluminum / titanium composite materials were prepared using 1mm thick single-sheet TA1 pure titanium plates and 3mm thick single-sheet 1060 pure aluminum plates as raw materials.

[0060] Step 1: Perform softening annealing treatment on TA1 pure titanium plate and 1060 pure aluminum plate respectively. The softening annealing temperature of TA1 pure titanium plate is 750℃ and the holding time is 30min. The softening annealing temperature of 1060 pure aluminum plate is 450℃ and the holding time is 60min.

[0061] Step 2: Perform surface mechanical grinding on the TA1 pure titanium plate to be laminated, removing surface contaminants and oxide layers while constructing a gradient nanocrystalline structure layer with a certain roughness and thickness. The vibration frequency is 50Hz, the shot diameter is 3mm, the vibration distance is 35mm, and the vibration time is 15min. Grind the 1060 pure aluminum plate to be laminated with a grinding wheel to remove the surface oxide layer and contaminants, obtaining a clean and rough surface to be laminated.

[0062] Step 3: Stack the TA1 pure titanium plate and 1060 pure aluminum plate in the form of TA1 / 1060 / TA1 to obtain the TA1 / 1060 / TA1 blank.

[0063] Step 4: The TA1 / 1060 / TA1 slab is subjected to single-pass rolling composite at room temperature with a rolling speed of 0.04 m / s and a rolling reduction of 50% to obtain the TA1 / 1060 / TA1 pre-composite slab.

[0064] Step 5: After holding the TA1 / 1060 / TA1 pre-composite billet at 400℃ for 10 min in an air atmosphere holding furnace, immediately perform single-pass hot rolling final composite, with a rolling speed of 0.04 m / s and a rolling reduction rate of 25%, to obtain the TA1 / 1060 / TA1 composite slab.

[0065] Step 6: Air-cool the TA1 / 1060 / TA1 composite slab to room temperature to obtain the titanium / aluminum / titanium composite material.

[0066] Example 3:

[0067] Titanium / aluminum composite materials were prepared using TC4 titanium alloy sheet with a thickness of 1.5 mm and 2024 aluminum alloy sheet with a thickness of 3 mm as raw materials.

[0068] Step 1: Perform softening annealing treatment on TC4 titanium alloy plate and 2024 aluminum alloy plate respectively. The softening annealing temperature of TC4 titanium alloy plate is 780℃ and the holding time is 30min. The softening annealing temperature of 2024 aluminum alloy plate is 450℃ and the holding time is 60min.

[0069] Step 2: The TC4 titanium alloy plate to be laminated is subjected to rapid rotary multi-rolling treatment to remove surface contaminants and oxide layers while constructing a gradient nanocrystalline structure layer with a certain roughness and thickness. The treatment time is 30 min, the pressure is 4.0 MPa, the sample speed is 2.0 mm / s, and the tool head speed is 1400 r / min. The 2024 aluminum alloy to be laminated surface is polished with a grinding wheel to remove the surface oxide layer and contaminants, obtaining a clean and rough surface to be laminated.

[0070] Step 3: Stack the pre-treated TC4 titanium alloy plate and 2024 aluminum alloy plate in an up-down stacking manner to obtain the TC4 / 2024 billet.

[0071] Step 4: After holding the TA1 / 2024 billet at 200℃ for 10 min, immediately perform single-pass rolling composite rolling at a rolling speed of 0.04 m / s and a rolling reduction rate of 45% to obtain the TA1 / 2024 pre-composite slab.

[0072] Step 5: After holding the TA1 / 2024 pre-composite slab at 400℃ for 10 minutes in an air atmosphere holding furnace, immediately perform single-pass hot rolling final composite, with a rolling speed of 0.04m / s and a rolling reduction rate of 30%, to obtain the TA1 / 2024 composite slab.

[0073] Step 6: Air-cool the TA1 / 2024 composite slab to room temperature to obtain a titanium / aluminum composite material with high interfacial bonding strength.

[0074] Comparative example:

[0075] Titanium / aluminum composite materials were prepared using a single sheet of TA1 pure titanium with a thickness of 1 mm and a single sheet of 6061 aluminum alloy with a thickness of 3 mm as raw materials and traditional mechanical grinding methods.

[0076] Step 1: Softening annealing treatment was performed on TA1 pure titanium plate and 6061 aluminum alloy plate respectively. The annealing regime of TA1 pure titanium plate was 750℃ for 30 min and the annealing regime of 6061 aluminum alloy plate was 450℃ for 60 min.

[0077] Step 2: Grind the TA1 pure titanium plate surface to be laminated with a grinding wheel to remove surface contaminants and oxide layer; grind the 6061 aluminum alloy surface to be laminated with a grinding wheel to remove surface oxide layer and contaminants, obtaining a clean and rough surface to be laminated.

[0078] Step 3: Stack the pre-treated TA1 pure titanium plate and 6061 aluminum alloy plate on top of each other to form a TA1 / 6061 billet.

[0079] Step 4: The TA1 / 6061 billet is subjected to single-pass rolling composite at room temperature with a rolling speed of 0.04 m / s and a rolling reduction rate of 45% to obtain the TA1 / 6061 pre-composite slab.

[0080] Step 5: After holding the TA1 / 6061 pre-composite slab at 400℃ for 10 minutes in an air atmosphere holding furnace, immediately perform single-pass hot rolling final composite rolling at a rolling speed of 0.04m / s and a rolling reduction rate of 25% to obtain the TA1 / 6061 composite slab.

[0081] Step Six: Air-cool the TA1 / 6061 composite slab to room temperature to obtain the titanium / aluminum composite material. No obvious cracks appeared on the titanium side of the interface of this titanium / aluminum composite material, and the interface was relatively straight. Figure 3 As shown.

[0082] In summary, this invention provides a high-interfacial-bonding-strength titanium / aluminum composite material and a rolling composite forming method. It employs a surface self-nano-processing method to perform high-energy modification on the surface of the titanium plate to be composited, constructing a gradient nanocrystalline structure layer with special morphology, roughness, hardness, and thickness. This reduces the degree of cracking on the titanium plate surface to be composited during rolling, increases the area of ​​fresh metal bonding, and accumulates a large number of defects on the surface, providing a rapid channel for atomic diffusion during subsequent heat treatment. This enables efficient atomic diffusion at lower temperatures, thereby improving the interfacial bonding strength of the titanium / aluminum composite material. This method solves the problems of insufficient cracking on the titanium plate surface and low interfacial bonding strength in traditional rolling composite preparation of titanium / aluminum composite materials, enabling the preparation of high-interfacial-bonding-strength titanium / aluminum composite materials with lower rolling reduction and lower diffusion heat treatment temperatures.

[0083] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A high interfacial bonding strength titanium / aluminum composite material roll-bonding forming method, characterized by, The method comprises the following steps: Step 1: softening annealing treatment is performed on the titanium plate and the aluminum plate respectively, wherein the heating temperature of the softening annealing treatment of the titanium plate is 650-850 DEG C, the holding time is 30-120 min, and the cooling mode is air cooling; the heating temperature of the softening annealing treatment of the aluminum plate is 400-500 DEG C, the holding time is 30-120 min, and the cooling mode is air cooling; Step 2: surface self-nanocrystallization treatment is performed on the surface of the titanium plate to be compounded after step 1, and a gradient nanocrystalline structure layer with specific morphology, roughness, hardness and thickness is constructed on the surface of the titanium plate to be compounded, wherein the method of surface self-nanocrystallization treatment of the titanium plate is at least one of surface mechanical grinding, mechanical shot peening, ultrasonic shot peening, supersonic particle bombardment, laser impact, ultrasonic impact, rapid multiple rotary rolling, surface deep rolling, ultrasonic rolling or surface high-pressure rolling; surface mechanical polishing treatment is performed on the surface of the aluminum plate to be compounded after step 1; Step 3: the titanium plate and the aluminum plate after step 2 are assembled to obtain a titanium / aluminum assembly; Step 4: single-pass rolling pre-composite is performed on the titanium / aluminum assembly to obtain a titanium / aluminum pre-composite plate blank; Step 5: single-pass hot rolling final composite is performed on the titanium / aluminum pre-composite plate blank to obtain a titanium / aluminum composite plate blank; Step 6: the titanium / aluminum composite plate blank is air-cooled to room temperature to obtain a titanium / aluminum composite material.

2. The method of claim 1, wherein the method is characterized by: In step 1, the titanium plate and the aluminum plate adopt single sheet form or roll form, the material of the titanium plate is at least one of pure titanium or titanium alloy, and the material of the aluminum plate is at least one of pure aluminum or aluminum alloy.

3. The method of claim 1, wherein the method is characterized by: In step 2, the thickness of the gradient nanocrystalline structure layer is 0.01-150 μm, the roughness is 0.1-10 μm, the grain size of the gradient nanocrystalline is 1-100 nm, the hardness is increased by 5%-300% compared with the hardness of the substrate, and the specific morphology is at least one of mirror surface, corrugated, groove, crater or grid.

4. The method of claim 1, wherein the method is characterized by: In step 4, the rolling speed is <0.2 m / s, the rolling reduction is 10%-50%, and the rolling temperature is room temperature-250 DEG C.

5. The method of claim 1, wherein the method is characterized by: In step 3, the titanium / aluminum assembly is a 2-10 layer titanium / aluminum laminated assembly or a titanium / aluminum / titanium laminated assembly.

6. The method of claim 1, wherein the method is characterized by: In step 5, the rolling temperature is 350-450 DEG C, the heating time is 5-30 min, the rolling speed is <0.2 m / s, and the rolling reduction is 10%-50%.

7. The method of claim 1, wherein the method is characterized by: The rolling composite forming method is continuous or intermittent, and subsequent diffusion annealing and straightening are performed on the titanium / aluminum composite material.

8. A high interfacial bonding strength titanium / aluminum composite material, characterized by, The high-interface bonding strength titanium / aluminum composite material is prepared by the rolling composite forming method according to any one of claims 1-7.

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