Preparation method of titanium alloy Warn-dot matrix composite structure

Abstract

The invention relates to the technical field of plastic forming, in particular to a preparation method of a titanium alloy Warn-dot matrix composite structure, which comprises the following steps: a core plate is a titanium alloy hollow Warn core plate, the core plate is placed between two titanium alloy panels, and reinforcing ribs are positioned on the end surfaces, far away from the core plate, of the corresponding titanium alloy panels; the two titanium alloy panels are coated with the two hollowed-out steel plates correspondingly, the two hollowed-out steel plates are coated with the two steel panels correspondingly, the edges of the steel panels and the steel frame are subjected to edge sealing welding, exhaust pipes are welded, and a first prefabricated blank is prepared; performing diffusion bonding on the first prefabricated blank; the steel frame and the steel panel of the first prefabricated blank after diffusion connection are removed, an air inlet pipe is welded to the air channel position of the core plate, and a second prefabricated blank is prepared; and the second prefabricated blank is subjected to superplastic forming, and the titanium alloy Warn-dot matrix composite structure is prepared. The preparation method of the titanium alloy Warn-dot matrix composite structure aims at solving the problem that a titanium alloy hollow Warn structure is low in heat dissipation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of plastic forming, and in particular to a method for preparing a titanium alloy valence-lattice composite structure. Background Art

[0002] The titanium alloy hollow valen structure has both excellent performance and integrated heat dissipation function by passing a medium inside. The hollow "valen" structure processed by superplastic forming / diffusion bonding process has the advantages of light weight, good vibration resistance and long service life. Using the titanium alloy hollow valen structure for aircraft engine fans and other components can effectively reduce the weight of aircraft engines, improve the strength performance of components, and enhance impact resistance. The hollow valen structure is used as a heat dissipation structure. The cooling medium passes through the middle flow channel, which will reduce the temperature of the hot surface, but this heat dissipation method belongs to "channel heat dissipation", and its heat dissipation efficiency is affected.

[0003] Therefore, the inventor provides a method for preparing a titanium alloy valence-lattice composite structure. Summary of the invention

[0004] (1) Technical issues to be solved

[0005] The embodiment of the present invention provides a method for preparing a titanium alloy valence-lattice composite structure, which solves the technical problem of low heat dissipation efficiency of the titanium alloy hollow valence structure.

[0006] (2) Technical solution

[0007] The present invention provides a method for preparing a titanium alloy valence-lattice composite structure, comprising the following steps:

[0008] Processing a titanium alloy face plate, a core plate and reinforcing ribs; wherein the core plate is a titanium alloy hollow Valen core plate, and the reinforcing ribs are perforated slats;

[0009] Processing steel panels, steel frames and hollow steel plates;

[0010] The surfaces of the core plate and the hollow steel plate are coated with solder stop agent, and both sides of the hollow steel plate are fully coated with solder stop agent;

[0011] The core plate is placed between the two titanium alloy panels, the reinforcing ribs are located at the end faces of the corresponding titanium alloy panels away from the core plate, the two hollow steel plates are respectively covered with the two titanium alloy panels, the two steel panels are respectively covered with the two hollow steel plates, the steel frame fixes and clamps the two steel panels, and the edges of the steel panels and the steel frame are sealed and welded, and the exhaust pipe is welded to prepare the first prefabricated blank;

[0012] After baking and vacuum packaging, the first preform is diffusion bonded;

[0013] The steel frame and the steel panel of the first preform after the diffusion bonding treatment are removed, and an air intake pipe is welded at the airway position of the core plate to prepare a second preform;

[0014] placing the second preform into a superplastic forming die for superplastic forming;

[0015] The hollow steel plate and reinforcing ribs on the formed second preform are removed to prepare a titanium alloy valen-lattice composite structure.

[0016] Furthermore, the diffusion bonding process parameters are: 1.0MPa~2.0MPa / 920℃~960℃ / 2h~4h.

[0017] Furthermore, the superplastic forming process parameters are: 1.0MPa~2.0MPa / 920℃~960℃ / 1h~2h.

[0018] Furthermore, the titanium alloy valence-lattice structure is surface pickled.

[0019] The present invention provides a method for preparing a titanium alloy valence-lattice composite structure, comprising the following steps:

[0020] Processing titanium aluminum alloy face plate and core plate, wherein the core plate is a titanium aluminum alloy hollow valen core plate;

[0021] Applying solder stopper to the surface of the titanium aluminum alloy panel;

[0022] A section of Ti is spliced ​​at the air inlet position of the titanium aluminum alloy panel. 2 AlNb plate;

[0023] At the edge of the titanium aluminum alloy panel and the Ti 2 A layer of brazing filler metal is coated on the air inlet edge of the AlNb plate;

[0024] The core plate is placed between the two titanium alloy panels, the two steel panels are respectively covered on the two titanium alloy panels, the steel frame fixes and clamps the two steel panels, and the edges of the steel panels and the steel frame are spot welded to prepare a first preform;

[0025] performing diffusion bonding on the first preform;

[0026] Remove the steel frame and steel panel of the first preform after diffusion bonding, and 2 The air inlet pipe is welded to the air inlet position of the AlNb plate to prepare a second preform;

[0027] The second preform is placed in a superplastic forming die and subjected to superplastic forming to prepare a titanium alloy valen-lattice composite structure.

[0028] Furthermore, the electric welding process parameters are: 900°C ~ 920°C / 5min ~ 10min.

[0029] Furthermore, the diffusion bonding process parameters are: 4.0MPa~6.0MPa / 1100℃~1150℃ / 2h~4h.

[0030] Furthermore, the superplastic forming process parameters are: 4.0MPa~6.0MPa / 1100℃~1150℃ / 1h~2h.

[0031] Furthermore, the material of the air intake pipe is TC4 titanium alloy.

[0032] Furthermore, the titanium aluminum alloy valence-lattice structure is surface pickled.

[0033] (3) Beneficial effects

[0034] In summary, the present invention combines the hollow valence structure and the three-dimensional lattice structure, that is, a triangular window is opened in the middle of the rib of the valence structure, so that the channels on both sides of the rib are connected, thereby greatly improving the heat dissipation efficiency. This titanium alloy valence-lattice composite structure can be prepared by superplastic forming / diffusion bonding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. 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.

[0036] Figure 1 It is a schematic flow chart of a method for preparing a titanium alloy valence-lattice composite structure provided by an embodiment of the present invention;

[0037] Figure 2 is a structural schematic diagram of a core plate provided by an embodiment of the present invention;

[0038] Figure 3 is a schematic structural diagram of a reinforcing rib provided by an embodiment of the present invention;

[0039] Figure 4 It is a structural schematic diagram of a steel frame provided by an embodiment of the present invention;

[0040] Figure 5 It is a structural schematic diagram of a hollow steel plate provided by an embodiment of the present invention;

[0041] Figure 6It is a schematic diagram of a solder stop coating structure on the front side of a core board provided by an embodiment of the present invention;

[0042] Figure 7 It is a schematic diagram of a solder stop coating structure on the reverse side of a core board provided by an embodiment of the present invention;

[0043] Figure 8 is a schematic diagram of the front structure of a preform provided by an embodiment of the present invention;

[0044] Fig. 9 It is a schematic diagram of the reverse structure of a preform provided by an embodiment of the present invention;

[0045] Fig.10 It is a schematic flow chart of a method for preparing a titanium alloy valence-lattice composite structure provided by an embodiment of the present invention;

[0046] Fig.11 It is a schematic diagram of the coating structure of a solder and a solder stopper on the front side of a titanium aluminum alloy provided by an embodiment of the present invention;

[0047] Fig.12 It is a schematic diagram of the coating structure of the solder and solder stopper on the reverse side of a titanium aluminum alloy provided by an embodiment of the present invention;

[0048] Fig.13 This is a Ti provided by an embodiment of the present invention. 2 Schematic diagram of the splicing structure of AlNb plates.

[0049] In the figure:

[0050] 1-core board; 2-strengthening ribs; 3-steel frame; 4-hollow steel plate; 5-solder stopper; 6-TC4 plate; 7-connection interface; 8-Ti 2 AlNb plate; 9-brazine; 10-titanium-aluminum alloy panel. DETAILED DESCRIPTION

[0051] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments, and covers any modification, replacement and improvement of parts, components and connection modes without departing from the spirit of the present invention.

[0052] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0053] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "installation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Figure 1 is a schematic diagram of a process for preparing a titanium alloy valence-lattice composite structure provided by an embodiment of the present invention, see Figure 1 , the method may include the following steps:

[0056] S101, process titanium alloy face plate, core plate and reinforcing ribs; among which, Figure 2 As shown, the core plate 1 is a titanium alloy hollow Valen core plate. Figure 3 As shown, the reinforcing rib 2 is a plate strip with holes.

[0057] Specifically, high-pressure water or laser cutting methods can be used to process titanium alloy panels, core plates, and reinforcing ribs. The reinforcing ribs are process reinforcing ribs, and the method of external process reinforcing ribs can be used to prepare a titanium alloy Valen-lattice composite structure with a panel thickness less than the core plate thickness.

[0058] S102: Process steel panels, steel frames and hollow steel plates.

[0059] Specifically, high pressure water or laser cutting can be used to process the steel panel and the steel frame 3 (such as Figure 4 As shown), hollow steel plate 4 (as Figure 5 shown).

[0060] S103. Solder stop agent is applied to the surface of the core plate and the hollow steel plate, and both sides of the hollow steel plate are fully coated with solder stop agent.

[0061] Specifically, Figures 6-7 As shown, solder stoppers 5 are coated at the hollowed-out positions on both the front and back sides of the core board 1 .

[0062] S104, placing the core plate between the two titanium alloy panels, the reinforcing ribs are located at the end faces of the corresponding titanium alloy panels away from the core plate, the two hollow steel plates are respectively covered with the two titanium alloy panels, the two steel panels are respectively covered with the two hollow steel plates, the steel frame fixes and clamps the two steel panels, and the edges of the steel panels and the steel frame are sealed and welded, and the exhaust pipe is welded to prepare Figures 8-9 A first preform is shown.

[0063] S105, after baking and vacuum packaging, the first preform is diffusion bonded.

[0064] Specifically, the diffusion bonding process parameters are: 1.0MPa~2.0MPa / 920℃~960℃ / 2h~4h.

[0065] S106, removing the steel frame and steel panel of the first preform after the diffusion bonding treatment, and welding the air intake pipe at the airway position of the core plate to prepare the second preform.

[0066] Specifically, the steel frame and steel panel of the first preform after diffusion bonding are removed by high-pressure water or laser cutting to expose the internal titanium alloy panel, and the titanium alloy intake pipe is welded at the airway position of the titanium alloy hollow Valen core plate.

[0067] S107, placing the second preform into a superplastic forming die for superplastic forming.

[0068] Specifically, the superplastic forming process parameters are: 1.0MPa~2.0MPa / 920℃~960℃ / 1h~2h.

[0069] S108, removing the hollow steel plate and reinforcing ribs on the formed second preform to prepare a titanium alloy valen-lattice composite structure.

[0070] Specifically, the hollow steel plate on the formed second preform is peeled off, and the process reinforcement ribs outside the titanium alloy panel are removed by CNC machining to prepare a titanium alloy valen-lattice composite structure with a smooth surface.

[0071] In the above embodiment, in order to make the titanium alloy hollow valen structure have good heat dissipation effect while maintaining excellent mechanical properties, the hollow valen structure and the three-dimensional lattice structure are combined to form a titanium alloy hollow valen core plate (specifically, a triangular window can be opened in the middle of the ribs of the valen structure), so that the channels on both sides of the ribs of the core plate are connected, thereby greatly improving the heat dissipation efficiency. This titanium alloy valen-lattice composite structure can be prepared by superplastic forming / diffusion bonding process.

[0072] As an optional implementation, the titanium alloy Valencia-lattice structure is subjected to surface pickling, wherein the surface pickling can remove the oxide scale and dirt on the surface.

[0073] Fig.10 is a schematic diagram of a process for preparing a titanium alloy valence-lattice composite structure provided by an embodiment of the present invention, see Fig.10 , the method may include the following steps:

[0074] S201, process titanium aluminum alloy face plate and core plate, the core plate is titanium aluminum alloy hollow valen core plate.

[0075] Specifically, high-pressure water or laser cutting methods can be used to process titanium-aluminum alloy face plates and core plates.

[0076] S202. Apply solder stopper to the surface of the titanium-aluminum alloy panel.

[0077] Specifically, Fig.12 As shown, a solder stopper 5 is coated on the surface of the titanium aluminum alloy panel 10 .

[0078] S203, splice a section of Ti at the intake duct position of the titanium aluminum alloy panel 2 AlNb plate.

[0079] Specifically, Fig.13 As shown, one end of the TC4 plate 6 is connected to the Ti 2 One end of the AlNb plate 8 is connected, and the connection interface 7 is a brazing or diffusion connection section. 2 The method of AlNb intake duct solves the problem that the titanium-aluminum alloy superplastic forming sleeve is difficult to weld the intake pipe, and realizes the superplastic forming of the difficult-to-form material titanium-aluminum alloy.

[0080] S204, in titanium aluminum alloy panel and Ti 2 A layer of brazing filler metal is coated on the air inlet edge of the AlNb plate.

[0081] Specifically, Fig.11 As shown, at the surface edge of the titanium aluminum alloy panel 10 and the Ti 2 The air inlet edges of the AlNb plate are coated with a circle of brazing material 9.

[0082] S205, placing the core plate between the two titanium alloy panels, the two steel panels are respectively covered on the two titanium alloy panels, the steel frame fixes and clamps the two steel panels, and spot welds the edges of the steel panels and the steel frame to prepare the first preform.

[0083] Specifically, the spot-welded preform is placed in a gas diffusion furnace and brazed at a process parameter of 900°C to 920°C / 5min to 10min to seal the pocket. The brazing solder edge sealing method is used to seal the sleeve formed after the titanium-aluminum alloy face plate and core plate are stacked to achieve subsequent superplastic forming, solving the problem that titanium-aluminum alloy is difficult to achieve edge sealing welding by welding.

[0084] S206, performing diffusion bonding on the first preform.

[0085] Specifically, argon gas is introduced into a gas diffusion furnace, and diffusion bonding of the titanium-aluminum alloy face plate and the titanium-aluminum alloy hollow valence core plate is achieved under the conditions of process parameters of 4.0MPa-6.0MPa / 1100°C-1150°C / 2h-4h.

[0086] S207, removing the steel frame and steel panel of the first preform after diffusion bonding, and 2 The air intake pipe is welded at the air intake position of the AlNb plate to prepare a second preform, wherein the material of the air intake pipe is TC4 titanium alloy.

[0087] S208, placing the second preform into a superplastic forming die, performing superplastic forming, and preparing a titanium alloy valen-lattice composite structure.

[0088] Specifically, the superplastic forming process parameters are: 4.0MPa~6.0MPa / 1100℃~1150℃ / 1h~2h.

[0089] In the above embodiment, in order to prepare a walnut / lattice structure of a difficult-to-form and difficult-to-weld material such as titanium aluminum alloy, the core plate and the face plate are not edge-sealed after lamination, but are edge-sealed by brazing. A section of an easy-to-weld material, such as Ti, is also welded at the air inlet position by brazing or diffusion bonding. 2 AlNb. Before superplastic forming, argon arc welding is used to weld the easy-to-weld material Ti 2 The front section of the AlNb intake pipe is welded with a TC4 titanium alloy intake pipe for connecting an argon gas source for superplastic forming.

[0090] As an optional implementation, the titanium aluminum alloy walnut-lattice structure is subjected to surface pickling, wherein the surface pickling can remove the oxide scale and dirt on the surface.

[0091] Example 1

[0092] 1. Use high-pressure water or laser cutting to process titanium alloy panels, core plates, and process reinforcement ribs, where the core plate is a hollow core plate, the reinforcement ribs are perforated slats, and the panel is a flat plate;

[0093] 2. Use high-pressure water or laser cutting to process steel panels, steel frames, and hollow steel plates;

[0094] 3. Assemble the titanium alloy panel, core plate, process reinforcement ribs, steel frame, and steel panel together, perform edge sealing welding on the edges of the steel panel and steel frame, and weld the exhaust pipe;

[0095] 4. After the prefabricated blank of the welding exhaust pipe is baked and vacuum packaged, it is sent into a gas diffusion furnace for diffusion bonding, wherein the diffusion bonding process is: 1.0MPa~2.0MPa / 920℃~960℃ / 2h~4h;

[0096] 5. Use high-pressure water or laser cutting to remove the steel frame and steel panel of the prefabricated blank after diffusion bonding to expose the internal titanium alloy, and weld the titanium alloy intake pipe at the airway position of the titanium alloy hollow core plate;

[0097] 6. Place the preform of the welded air intake pipe into a superplastic forming die for superplastic forming. The superplastic forming process is: 1.0MPa~2.0MPa / 920℃~960℃ / 1h~2h;

[0098] 7. Remove the hollow steel plate on the formed preform, and use CNC machining to remove the process reinforcement ribs on the outside of the titanium alloy panel to prepare a titanium alloy Valen-lattice structure with a smooth surface;

[0099] 8. Perform surface pickling on the titanium alloy Valen-lattice structure to remove surface oxide scale and dirt.

[0100] Example 2

[0101] 1. Use high-pressure water or laser cutting to process titanium-aluminum alloy panels, core panels, and process reinforcement ribs, where the core panel is a hollow core panel, the reinforcement ribs are perforated slats, and the panel is a flat plate;

[0102] 2. Use high-pressure water or laser cutting to process steel panels, steel frames, and hollow steel plates;

[0103] 3. Titanium aluminum alloy panel, core plate, spliced ​​Ti 2 The AlNb plate air inlet, process reinforcement ribs, steel frame and steel panel are assembled together, and the edges of the steel panel and the steel frame are sealed and welded, and the exhaust pipe is welded;

[0104] 4. After the prefabricated blank of the welding exhaust pipe is baked and vacuum packaged, it is sent into a gas diffusion furnace for diffusion bonding, wherein the diffusion bonding process is: 4.0MPa~6.0MPa / 1100℃~1150℃ / 2h~4h;

[0105] 5. Use high-pressure water or laser cutting to remove the steel frame and steel panel of the diffusion-bonded prefabricated blank to expose the internal titanium-aluminum alloy. 2 The airway position of the AlNb hollow core plate is welded with a TC4 titanium alloy intake pipe;

[0106] 6. Place the preform of the welded air intake pipe into a superplastic forming die for superplastic forming. The superplastic forming process is: 4.0MPa-6.0MPa / 1100℃-1150℃ / 1h-2h;

[0107] 7. Remove the hollow steel plate on the formed preform, and use CNC machining to remove the process reinforcement ribs on the outside of the titanium-aluminum alloy panel to prepare a titanium-aluminum alloy Valen-lattice structure with a smooth surface;

[0108] 8. Perform surface pickling on the titanium aluminum alloy Valen-lattice structure to remove surface oxide scale and dirt.

[0109] Example 3

[0110] 1. Use high-pressure water or laser cutting to process titanium-aluminum alloy panels and core plates, where the core plate is a hollow core plate;

[0111] 2. Apply solder stopper to the surface of the titanium-aluminum alloy panel. The solder stopper pattern of the titanium-aluminum alloy panel is as follows: Figure 5 As shown;

[0112] 3. Splice a section of Ti at the air intake position 2 AlNb plate;

[0113] 4. Ti on the panel and splicing 2 The edge of the AlNb plate inlet is coated with a layer of brazing filler metal, such as Figure 8 As shown;

[0114] 5. Assemble the titanium alloy panel and core plate together, and spot weld the edges of the steel panel and steel frame using argon arc welding;

[0115] 6. Place the spot-welded preform into a gas diffusion furnace and perform brazing at a process parameter of 900°C to 920°C / 5min to 10min to seal the pocket. Then, introduce argon into the gas diffusion furnace and achieve diffusion connection between the panel and the hollow core plate at a process parameter of 4.0MPa to 6.0MPa / 1100°C to 1150°C / 2h to 4h.

[0116] 7. In the splicing Ti 2 AlNb intake duct position welding TC4 titanium alloy intake pipe;

[0117] 8. Place the preform of the welded air intake pipe into a superplastic forming die to superplastically form a titanium aluminum alloy valen-lattice structure, wherein the superplastic forming process is: 4.0MPa-6.0MPa / 1100℃-1150℃ / 1h-2h;

[0118] 9. Perform surface pickling on the titanium aluminum alloy Valen-lattice structure to remove surface oxide scale and dirt.

[0119] It should be clear that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the figures. In addition, for the sake of brevity, a detailed description of known methods and technologies is omitted here.

[0120] The above are only embodiments of the present application and are not limited to the present application. For those skilled in the art, the present application may have various changes and variations without departing from the scope of the present invention. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A method for preparing a titanium alloy valence-lattice composite structure, characterized in that: The method comprises the following steps: Processing a titanium alloy face plate, a core plate and reinforcing ribs; wherein the core plate is a titanium alloy hollow Valen core plate, and the reinforcing ribs are perforated slats; Processing steel panels, steel frames and hollow steel plates; The surfaces of the core plate and the hollow steel plate are coated with solder stop agent, and both sides of the hollow steel plate are fully coated with solder stop agent; The core plate is placed between the two titanium alloy panels, the reinforcing ribs are located at the end faces of the corresponding titanium alloy panels away from the core plate, the two hollow steel plates are respectively covered with the two titanium alloy panels, the two steel panels are respectively covered with the two hollow steel plates, the steel frame fixes and clamps the two steel panels, and the edges of the steel panels and the steel frame are sealed and welded, and the exhaust pipe is welded to prepare the first prefabricated blank; After baking and vacuum packaging, the first preform is diffusion bonded; The steel frame and the steel panel of the first preform after the diffusion bonding treatment are removed, and an air intake pipe is welded at the airway position of the core plate to prepare a second preform; placing the second preform into a superplastic forming die for superplastic forming; The hollow steel plate and reinforcing ribs on the formed second preform are removed to prepare a titanium alloy valen-lattice composite structure.

2. The method for preparing the titanium alloy valence-lattice composite structure according to claim 1, characterized in that: Diffusion bonding process parameters are: 1.0MPa~2.0MPa / 920℃~960℃ / 2h~4h.

3. The method for preparing the titanium alloy valence-lattice composite structure according to claim 1, characterized in that: The superplastic forming process parameters are: 1.0MPa~2.0MPa / 920℃~960℃ / 1h~2h.

4. The method for preparing the titanium alloy valence-lattice composite structure according to claim 1, characterized in that: The titanium alloy Valencia-lattice structure is surface pickled.

5. A method for preparing a titanium alloy valence-lattice composite structure, characterized in that: The method comprises the following steps: Processing titanium aluminum alloy face plate and core plate, wherein the core plate is a titanium aluminum alloy hollow valen core plate; Applying solder stopper to the surface of the titanium aluminum alloy panel; Splicing a section of Ti2AlNb plate at the air inlet position of the titanium aluminum alloy panel; Coating a layer of brazing filler metal on the edge of the titanium aluminum alloy panel and the edge of the air inlet of the Ti2AlNb plate; The core plate is placed between the two titanium-aluminum alloy panels, the two steel panels are respectively covered on the two titanium-aluminum alloy panels, the steel frame fixes and clamps the two steel panels, and the edges of the steel panels and the steel frame are spot welded to prepare a first preform; performing diffusion bonding on the first preform; The steel frame and the steel panel of the first preform after diffusion bonding are removed, and an intake pipe is welded at the intake duct position of the Ti2AlNb plate to prepare a second preform; The second preform is placed in a superplastic forming die and subjected to superplastic forming to prepare a titanium-aluminum alloy valen-lattice composite structure.

6. The method for preparing the titanium alloy valence-lattice composite structure according to claim 5, characterized in that: The electric welding process parameters are: 900℃~920℃ / 5min~10min.

7. The method for preparing the titanium alloy valence-lattice composite structure according to claim 5, characterized in that: The diffusion bonding process parameters are: 4.0MPa~6.0MPa / 1100℃~1150℃ / 2h~4h.

8. The method for preparing the titanium alloy valence-lattice composite structure according to claim 5, characterized in that: The superplastic forming process parameters are: 4.0MPa~6.0MPa / 1100℃~1150℃ / 1h~2h.

9. The method for preparing the titanium alloy valence-lattice composite structure according to claim 5, characterized in that: The material of the air intake pipe is TC4 titanium alloy.

10. The method for preparing the titanium alloy valence-lattice composite structure according to claim 5, characterized in that: The titanium aluminum alloy walnut-lattice structure is surface pickled.

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