CN108080804B - Ti-Al 3Preparation method of Ti laminated composite material hollow sandwich structure - Google Patents
Ti-Al 3Preparation method of Ti laminated composite material hollow sandwich structure Download PDFInfo
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- CN108080804B CN108080804B CN201611016006.3A CN201611016006A CN108080804B CN 108080804 B CN108080804 B CN 108080804B CN 201611016006 A CN201611016006 A CN 201611016006A CN 108080804 B CN108080804 B CN 108080804B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/003—Welding in a furnace
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Abstract
The invention provides Ti-Al
3The preparation method of the Ti laminated composite material hollow sandwich structure is characterized in that Ti foil, Al foil and titanium alloy sheet which are overlapped according to a preset sequence are processed by an air pressure hot pressing composite process and combined with super-alloyPreparation of Ti-Al by plastic forming/diffusion bonding technology
3A hollow sandwich structure of Ti laminated composite material. The invention adopts air pressure to carry out hot-pressing composite preparation on Ti-Al
3In the process of the Ti laminated composite material, the superplastic forming/diffusion bonding process is combined to realize Ti-Al
3The forming and the preparation of the Ti laminated composite material hollow sandwich structure are completed in the same process, and the process method can effectively reduce the cost and improve the manufacturing efficiency. In addition, Ti-Al can be controlled
3The interlayer spacing and the layer thickness ratio of the Ti layered composite material can further regulate and control the performance of the material.
Description
Technical Field
The invention relates to the technical field of composite material forming, in particular to Ti-Al
3A method for preparing a Ti laminated composite material hollow sandwich structure.
Background
The lamination of the nacreous layer in the shell is the source of its high fracture toughness. People simulate the structure to design a layered composite material, so that the layered composite material has the advantages of 2 or more than 2 combined materials, and the performance is obviously superior to that of a corresponding monomer material. In several current research fields, metal-intermetallic compound layered composite materials are receiving much attention in the aerospace field due to their superior high temperature toughness, creep resistance, low temperature fracture strength, fracture toughness, oxidation resistance during thermal cycling, microstructure thermodynamic stability at higher temperatures, etc., for example, aluminum-based layered composite materials are used as fuselage skins of aerospace vehicles.
Ti-Al
3The Ti layered composite material uses high-temperature metal Ti as a toughening element, and can prevent the formation of crack tips by utilizing the good deformability of a Ti layer, thereby well overcoming the intermetallic compound Al
3The brittleness of Ti is large, thereby leading Ti-Al to be
3The Ti layered composite material has good damage tolerance performance, not only has higher specific compressive strength, but also has good specific fracture toughness, and has wider performance adjustment range, and meanwhile, the required mechanical and thermal treatment performance can be adjusted by changing the thickness of each layer and the volume fraction of components in the layered composite material, so that the Ti layered composite material has great application potential in the fields of aerospace and the like.
Ti-Al
3The preparation process of the Ti layered composite material mainly comprises rolling composite, hot pressing composite and electron beam vapor deposition. Rolling composite process for preparing Ti-Al
3The technological process of the Ti layered composite material is that the foils with the cleaned surfaces are alternately laminated, and then the laminated composite material is put on a rolling machine to carry out rolling composite reaction at a certain temperature and deformation, and finally the laminated composite material is prepared. Pure titanium sheathed hot rolling adopted by institute of metal of Chinese academy of sciencesThe process prepares Ti-Al
3The research of the Ti layered composite material shows that Ti/Al laminated foil can be prepared into Ti-Al by hot rolling at 950 DEG C
3A layered composite material of Ti alternately laminated. The hot-pressing compounding is that Ti/Al foils are alternately laminated according to a certain proportion, heated to a certain temperature, applied with a certain pressure for interlayer diffusion, and reacted at a certain temperature and pressure after a certain time, and finally a compact tissue structure with alternately connected layers is formed. The electron beam vapor deposition is an evaporation method using electron beams as a heat source, wherein the electron beams are focused on an evaporation source spindle through a magnetic field or an electric field to melt the material, and then gas phase atoms of the evaporation source material move from the surface of a molten pool to the surface of a substrate in a linear mode in a vacuum environment to deposit and form a film. When the electron beam vapor deposition method is used for preparing the micro-laminated composite material, different materials are respectively melted and evaporated, and are deposited on the surface of a base material layer by layer, so that the micro-laminated composite material with small single-layer thickness and good bonding performance is prepared. The electron beam physical vapor deposition rate is high, and particularly the development of the high-power electron beam physical vapor deposition technology makes the preparation of large-size micro-laminated composite materials possible. The Harbin industry university adopts an electron beam vapor deposition method to prepare a large-size Ti/TiAl laminated composite material, and finds that the hardness of the laminated composite material is increased along with the reduction of the interlayer spacing or the increase of the TiAl layer thickness; and the Ti/TiAl laminated composite material has obvious effect on improving the room temperature brittleness of TiAl. The laminated composite material is abnormally strengthened by TiAl at 500-800 ℃, and the strength is not obviously reduced.
The hollow sandwich structure has the advantages that the specific strength is high, the specific modulus is high, the vibration and noise reduction is realized, the fatigue resistance is good, the designability is strong and the like which cannot be compared with the common structure, and the hollow sandwich structure is widely applied to engineering practice of aerospace, marine structures and the like which have higher requirements on the self weight, the structural strength and the concealment of the structure.
The main processes for producing hollow sandwich structures are usually superplastic forming/diffusion bonding processes and honeycomb brazing processes. The superplastic forming/diffusion bonding process is characterized in that a metal plate with a surface coated with a solder stop agent pattern is overlaid with two or three layers of plates and then sealed and welded, diffusion bonding is carried out between the plates under the conditions of certain temperature, air pressure and time, argon is introduced between the plates after bonding is finished, forming of a skin and a stud is finished, and finally a hollow sandwich structure is formed. The honeycomb brazing process is to connect the honeycomb core and the upper and lower panels by a brazing method to form a metal honeycomb sandwich structure. At present, the composite material is widely researched and applied in the fields of aviation and aerospace at home and abroad, such as the parts of airframes, wings, engine nacelle exhaust nozzles and the like.
Existing composite method for preparing Ti-Al
3The Ti laminated composite material has the problems that the interlayer spacing and the layer thickness ratio are difficult to control, so that the performance of the material is difficult to flexibly regulate and control, and if Ti-Al with a complex curved surface appearance is prepared
3Ti layered composites are difficult. Moreover, the existing preparation method is difficult to combine with the superplastic forming/diffusion bonding technology to ensure that Ti-Al is subjected to
3The preparation of the Ti laminated composite material and the forming of the hollow structure are completed in one process.
Disclosure of Invention
An object of the present invention is to provide a method for controlling Ti-Al
3The interlayer spacing and the layer thickness ratio of the Ti layered composite material can regulate and control the performance of the material, and can combine the superplastic forming/diffusion connection technology to ensure that Ti-Al
3Ti-Al completed in one process for preparing Ti laminated composite material and forming hollow structure
3A method for preparing a Ti laminated composite material hollow sandwich structure.
The invention provides Ti-Al
3The preparation method of the Ti laminated composite material hollow sandwich structure is characterized in that Ti foil, Al foil and titanium alloy sheet which are overlapped in a determined sequence are processed by a pneumatic hot-pressing compounding process to prepare Ti-Al
3Ti-Al laminated composite material and combined superplastic forming/diffusion bonding technology
3Hollow sandwich structure in Ti laminated composite material.
The invention adopts air pressure to carry out hot-pressing compounding and combines the superplastic forming/diffusion connection technology to lead Ti-Al to be combined
3The preparation of the Ti layered composite material and the forming of the hollow structure are completed in one process, and the process method can effectively reduce the cost and improve the manufacturing efficiency. At the same time, the utility model can alsoTo control Ti-Al
3The interlayer spacing and the layer thickness ratio of the Ti layered composite material can regulate and control the performance of the material.
Specifically, the Ti-Al
3The preparation method of the Ti laminated composite material hollow sandwich structure comprises the following steps:
11) selecting Ti foil, Al foil and titanium alloy thin plates with the same size, and cleaning the surfaces of the Ti foil, the Al foil and the titanium alloy thin plates;
12) coating a solder mask on the upper and lower surfaces of the titanium alloy sheet according to a designed pattern;
13) placing the titanium alloy sheet coated with the solder stop agent between two layers of Ti foils, then alternately stacking Al foils and Ti foils on two sides respectively, wherein the total thickness of the one-side stacked titanium alloy sheet is the same as or slightly larger than the thickness of the middle titanium alloy sheet, and the outermost layer is the Ti foil or the titanium alloy sheet coated with the solder stop agent;
14) spot welding is carried out on four corner points of the laminated multilayer board after the superposition is finished, dislocation is prevented, then sealing welding is carried out on the periphery, an outer air passage is reserved on the side face of the multilayer board, an inner air passage is reserved between the middle titanium alloy thin board on the other side and the Ti foils on the two sides, and air pipes are welded at the reserved air passages;
15) vacuumizing and detecting the sealed multilayer board, if no air leakage exists, putting the sealed multilayer board into equipment, heating to 600-750 ℃, then applying 3-8 MPa of air pressure to the surface, preserving heat and pressure for 6-12 h, and enabling the Ti foil and the Al foil to fully react to generate Al
3A Ti layer;
16) heating the furnace to 780-940 ℃, applying air pressure of 1.0-3.0 MPa to the surface of the multilayer board, and preserving heat and pressure for 30 min-2 h to enable the middle titanium alloy thin board and the Ti foils on the two sides to complete diffusion connection;
17) introducing argon gas of 1.0-3.0 MPa into an air channel in the multilayer board through a vent pipe, and performing heat preservation and pressure maintaining for 1-2 hours to prepare Ti-Al
3The Ti laminated composite material is of a hollow sandwich structure.
Further, in the step 11), Kroll solution is adopted to carry out surface degreasing and pickling on the Ti foil, the Al foil and the titanium alloy sheet.
Further, the size of the outermost Ti foil or the titanium alloy sheet coated with the solder stop agent in the step 13) is slightly larger than that of the inner Ti foil, the inner Al foil and the inner titanium alloy sheet.
Further, the step 16) further comprises placing the multilayer board in a mold having a curved shape, and allowing the resultant Ti-Al to form a Ti-Al layer
3The Ti layer and the die are attached to form a structure with a curved surface.
Specifically the Ti-Al
3The preparation method of the Ti laminated composite material hollow sandwich structure also comprises the following steps:
21) selecting Ti foil, Al foil and titanium alloy thin plates with the same size, and cleaning the surfaces of the Ti foil, the Al foil and the titanium alloy thin plates;
22) taking a titanium alloy sheet coated with a solder stop agent according to a designed pattern, and oppositely attaching the surface with the solder stop agent to another titanium alloy sheet without the solder stop agent with the same specification;
23) sealing edges of the attached titanium alloy thin plate, reserving an inner air passage on the side surface, and welding an air pipe at the inner air passage;
24) placing the attached titanium alloy thin plate between two layers of Ti foils, then alternately stacking Al foils and Ti foils on two sides respectively, wherein the total thickness of the stacked titanium alloy thin plates on one side is the same as or slightly larger than the thickness of the middle titanium alloy thin plate, and the outermost layer is the Ti foil or the titanium alloy thin plate coated with a solder stop agent;
25) spot welding four corner points of the superposed multilayer board to prevent dislocation, then sealing and welding the periphery, reserving a first outer air channel at the positions of two laminated titanium alloy thin boards and the Ti foils at two sides on the opposite side of the inner air channel, reserving a second outer air channel between two outermost Ti foils or titanium alloy thin boards at the third side, and welding vent pipes at the reserved outer air channels;
26) vacuumizing and detecting the sealed multilayer board, if no air leakage exists, putting the sealed multilayer board into equipment, heating to 600-750 ℃, then applying 3-8 MPa of air pressure to the surface, preserving heat and pressure for 6-12 h, and enabling the Ti foil and the Al foil to fully react to generate Al
3A Ti layer;
27) raising the temperature of the furnace to 780-940 ℃, introducing 1.0-3.0 MPa of air pressure into the first outer air duct, maintaining the pressure and preserving the heat for 30 min-2 h to realize diffusion connection of the two middle titanium alloy sheets and simultaneously generate Ti-Al
3Attaching the Ti layered composite material to an externally arranged die;
28) applying 1.0-3.0 MPa of air pressure to the internal air passage, preserving heat and pressure for 1-2 h, forming two titanium alloy plates, and preparing Ti-Al
3The Ti laminated composite material is of a hollow sandwich structure.
Further, in the step 21), Kroll solution is adopted to carry out surface degreasing and pickling on the Ti foil, the Al foil and the titanium alloy sheet.
Further, the size of the outermost Ti foil or the titanium alloy sheet coated with the solder stop agent in the step 24) is slightly larger than that of the inner Ti foil, the inner Al foil and the inner titanium alloy sheet.
Further, the step 27) further comprises the steps of; placing the multilayer plate in a mold having a curved surface shape to form Ti-Al
3The Ti layer and the die are attached to form a structure with a curved surface.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 shows Ti-Al of an embodiment of the present invention
3A flow chart of a preparation method of the Ti laminated composite material hollow sandwich structure;
FIG. 2 is a schematic view of a titanium foil, an aluminum foil and a titanium alloy sheet according to an embodiment of the present invention;
FIG. 3 is a schematic view of the upper and lower surfaces of a titanium alloy sheet coated with a solder stop pattern according to an embodiment of the present invention;
FIG. 4 is a schematic view of a multi-layer plate spot welding location of an embodiment of the present invention;
FIG. 5 is a schematic view of the edge banding location of a multi-layer panel of an embodiment of the present invention;
FIG. 6 is a schematic view of a snorkel welding position according to an embodiment of the invention;
FIG. 7 is a Ti-Al alloy after forming in accordance with an embodiment of the present invention
3The structural schematic diagram of the Ti layered composite material;
FIG. 8 is a Ti-Al alloy after forming in accordance with an embodiment of the present invention
3The structural schematic diagram of the Ti layered composite material;
FIG. 9 shows Ti-Al of another embodiment of the present invention
3A flow chart of a preparation method of the Ti laminated composite material hollow sandwich structure;
FIG. 10 is a Ti-Al alloy after forming in accordance with an embodiment of the present invention
3The structural schematic diagram of the Ti layered composite material;
FIG. 11 is a Ti-Al alloy after forming in accordance with an embodiment of the present invention
3The structure of the Ti layered composite material is shown schematically.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The invention provides Ti-Al
3The preparation method of the Ti laminated composite material hollow sandwich structure comprises the steps of processing a Ti foil, an Al foil and a titanium alloy sheet which are stacked according to a determined sequence by an air pressure hot pressing composite process to prepare the Ti-Al laminated composite material hollow sandwich structure
3Ti-Al laminated composite material and combined superplastic forming/diffusion bonding technology
3Hollow sandwich structure in Ti laminated composite material. The invention adopts air pressure to carry out hot-pressing compounding and combines the superplastic forming/diffusion connection technology to lead Ti-Al to be combined
3The preparation of the Ti layered composite material and the forming of the hollow structure are completed in one process, and the process method can effectively reduce the cost and improve the manufacturing efficiency. Simultaneously, Ti-Al can be controlled
3The interlayer spacing and the layer thickness ratio of the Ti layered composite material can regulate and control the performance of the material.
Example one
Specifically, the Ti-Al
3The preparation method of the Ti laminated composite material hollow sandwich structure shown in figure 1 comprises the following steps:
11) selecting Ti foil, Al foil and titanium alloy thin plate with the same size, and cleaning the surface of the Ti foil, the Al foil and the titanium alloy thin plate.
12) And coating the upper surface and the lower surface of the titanium alloy thin plate with a solder stop agent according to a designed pattern. As shown in fig. 3, the design pattern is determined according to the internal structure and shape of the formed composite material.
13) The titanium alloy thin plate coated with the solder stop agent is placed between two layers of Ti foils, then Al foils and Ti foils are alternately stacked on two sides respectively, the total thickness of the stacked titanium alloy thin plate on one side is the same as or slightly larger than that of the middle titanium alloy thin plate, and the outermost layer is the Ti foil or the titanium alloy thin plate coated with the solder stop agent. As shown in fig. 2, a titanium alloy thin plate 1 is placed in the middle, Ti foils 2 are attached to both sides thereof, and then Al foils 3 are disposed on the outer sides thereof, alternately in this order.
14) And spot welding is carried out on four corner points of the laminated board after the superposition is finished, dislocation is prevented, then sealing welding is carried out on the periphery, air passages are reserved on two side faces of the laminated board, and air pipes are welded at the reserved air passages. As shown in fig. 4, the welding points are located at four vertices of the multi-layer board, and as shown in fig. 5, the periphery of the multi-layer board is sealed, and an outer air passage 5 and an inner air passage 6 are reserved for welding the vent pipe.
15) Vacuumizing and detecting the sealed multilayer board, if no air leakage exists, putting the sealed multilayer board into equipment, heating to 600-750 ℃, then applying 3-8 MPa of air pressure to the surface, preserving heat and pressure for 6-12 h, and enabling the Ti foil and the Al foil to fully react to generate Al
3And a Ti layer.
16) And (3) heating the furnace to 780-940 ℃, applying 1.0-3.0 MPa of air pressure to the surface of the multilayer board, and preserving heat and pressure for 30 min-2 h to ensure that the middle titanium alloy thin board and the Ti foils on the two sides are in diffusion connection.
17) Introducing argon gas of 1.0-3.0 MPa into an air channel in the multilayer board through a vent pipe, and performing heat preservation and pressure maintaining for 1-2 hours to prepare Ti-Al
3The hollow sandwich structure of the Ti laminated composite material is shown in figure 7 and comprises a titanium alloy thin plate 7 on the surface layer and a Ti-Al3Ti laminated composite material 8 in the middle.
In one aspect of the embodiment of the present invention, in the step 11), a Kroll solution is used to perform degreasing and pickling on the surfaces of the Ti foil, the Al foil and the titanium alloy sheet. The Kroll solution is an acidic solution, and can effectively remove pollutants on the surfaces of Ti foil, Al foil and titanium alloy thin plates, which obstruct diffusion connection.
In one aspect of the embodiment of the present invention, the Ti foil or the titanium alloy sheet coated with the solder stop agent in the outermost layer in the step 13) has a slightly larger size than the Ti foil, the Al foil and the titanium alloy sheet in the inner layer. As shown in fig. 5, the outermost Ti foil or Ti alloy sheet coated with a solder stop agent is slightly larger in size to place the inner slab therein, facilitating the seal welding and the reaction therein.
In one aspect of an embodiment of the present invention, the step 16) further comprises placing the multilayer sheet in a mold having a curved shape, and allowing the resultant Ti — Al to form
3The Ti layer and the die are attached to form a structure with a curved surface, as shown in FIG. 8.
Example two
Specifically, the Ti-Al
3The preparation method of the Ti laminated composite material hollow sandwich structure as shown in fig. 9 comprises the following steps:
21) selecting Ti foil, Al foil and titanium alloy thin plate with the same size, and cleaning the surface of the Ti foil, the Al foil and the titanium alloy thin plate.
22) A titanium alloy sheet coated with the solder stop agent according to a designed pattern is taken, and the surface with the solder stop agent is attached to another titanium alloy sheet without the solder stop agent with the same specification in an opposite mode. The design pattern is determined according to the internal structure and shape of the formed hollow structure.
23) And sealing the edge of the attached titanium alloy thin plate, reserving an inner air passage on the side surface, and welding an air pipe at the inner air passage.
24) The laminated titanium alloy thin plate is placed between two layers of Ti foils, then Al foils and Ti foils are alternately stacked on two sides respectively, the total thickness of the stacked titanium alloy thin plate on one side is the same as or slightly larger than the thickness of the middle titanium alloy thin plate, and the outermost layer is the Ti foil or the titanium alloy thin plate coated with a welding stopping agent.
25) Spot welding four corner points of the superposed multilayer board to prevent dislocation, then sealing and welding the periphery, reserving a first outer air channel at the positions of two laminated titanium alloy thin boards and the Ti foils at two sides on the opposite side of the inner air channel, reserving a second outer air channel between two outermost Ti foils or titanium alloy thin boards at the third side, and welding vent pipes at the reserved outer air channels; .
26) Vacuumizing and detecting the sealed multilayer board, if no air leakage exists, putting the multilayer board into equipment, heating to 600-750 ℃, and then performing surface alignmentApplying 3-8 MPa of air pressure on the surface, preserving heat and maintaining pressure for 6-12 h to ensure that the Ti foil and the Al foil fully react to generate Al
3And a Ti layer.
27) Raising the temperature of the furnace to 780-940 ℃, introducing 1.0-3.0 MPa of air pressure into the first outer air duct, maintaining the pressure and preserving the heat for 30 min-2 h to realize diffusion connection of the two middle titanium alloy sheets and simultaneously generate Ti-Al
3And (3) attaching the Ti layered composite material to an externally arranged die.
28) Applying air pressure of 1.0-3.0 MPa to the internal air passage, preserving heat and pressure for 1-2 h, forming two titanium alloy plates to form a stud interlayer structure, and preparing Ti-Al
3The hollow sandwich structure of the Ti laminated composite material is shown in figure 10 and comprises a titanium alloy thin plate 7 on the surface layer and a Ti-Al3Ti laminated composite material 8 in the middle.
In one aspect of the embodiment of the present invention, in the step 21), a Kroll solution is used to perform degreasing and pickling on the surfaces of the Ti foil, the Al foil and the titanium alloy sheet. The Kroll solution is an acidic solution, and can effectively remove pollutants on the surfaces of Ti foil, Al foil and titanium alloy thin plates, which obstruct diffusion connection.
In one aspect of the embodiment of the present invention, the Ti foil or the titanium alloy sheet coated with the solder stop agent in the outermost layer in the step 24) has a slightly larger size than the Ti foil, the Al foil and the titanium alloy sheet in the inner layer. The outermost Ti foil or Ti alloy sheet coated with the solder mask is slightly oversized to allow the inner multi-layer sheet blank to be placed therein, facilitating the seal weld and reaction therein.
In one aspect of an embodiment of the present invention, the step 27) further comprises placing the multi-layer board in a mold having a curved shape, and allowing the resultant Ti — Al to form
3The Ti layer and the die are attached to form a structure with a curved surface, as shown in FIG. 11.
The invention adopts the Ti-Al pair
3The preparation of Ti laminated composite material and the formation of hollow sandwich structure are integrated to realize Ti-Al
3The forming and the preparation of the Ti laminated composite material hollow sandwich structure are completed in the same process, and the process method can effectively reduce the cost and improve the manufacturing efficiency.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. Ti-Al
3The preparation method of the Ti laminated composite material hollow sandwich structure is characterized in that the Ti foil, the Al foil and the titanium alloy sheet which are overlapped in a determined sequence are processed by a pneumatic hot-pressing compounding process to prepare the Ti-Al laminated composite material hollow sandwich structure
3Ti-Al laminated composite material is prepared by combining with superplastic forming/diffusion bonding technology
3A hollow sandwich structure of Ti laminated composite material;
the Ti-Al
3The preparation method of the Ti laminated composite material hollow sandwich structure specifically comprises the following steps:
11) selecting Ti foil, Al foil and titanium alloy thin plates with the same size, and cleaning the surfaces of the Ti foil, the Al foil and the titanium alloy thin plates;
12) coating a solder mask on the upper and lower surfaces of the titanium alloy sheet according to a designed pattern;
13) placing the titanium alloy sheet coated with the solder stop agent between two layers of Ti foils, then alternately stacking Al foils and Ti foils on two sides respectively, wherein the total thickness of the one-side stacked titanium alloy sheet is the same as or slightly larger than the thickness of the middle titanium alloy sheet, and the outermost layer is the Ti foil or the titanium alloy sheet coated with the solder stop agent;
14) spot welding is carried out on four corner points of the laminated multilayer board after the superposition is finished, dislocation is prevented, then sealing welding is carried out on the periphery, an outer air passage is reserved on the side face of the multilayer board, an inner air passage is reserved between the middle titanium alloy thin board on the other side and the Ti foils on the two sides, and air pipes are welded at the reserved air passages;
15) vacuumizing and detecting the sealed multilayer board, if no air leakage exists, putting the sealed multilayer board into equipment, heating to 600-750 ℃, then applying 3-8 MPa of air pressure to the surface, preserving heat and pressure for 6-12 h, and enabling the Ti foil and the Al foil to fully react to generate Al
3A Ti layer;
16) heating the furnace to 780-940 ℃, applying air pressure of 1.0-3.0 MPa to the outer surface of the multilayer board, and preserving heat and pressure for 30 min-2 h to ensure that the middle titanium alloy thin board and the Ti foils on the two sides are in diffusion connection;
17) introducing argon gas of 1.0-3.0 MPa into an air channel in the multilayer board through a vent pipe, and performing heat preservation and pressure maintaining for 1-2 hours to prepare Ti-Al
3The Ti laminated composite material is of a hollow sandwich structure.
2. Ti-Al according to claim 1
3The preparation method of the Ti laminated composite material hollow sandwich structure is characterized in that Kroll solution is adopted to carry out surface degreasing and acid pickling on Ti foil, Al foil and titanium alloy thin plates in the step 11).
3. Ti-Al according to claim 1
3The preparation method of the Ti laminated composite material hollow sandwich structure is characterized in that the size of the Ti foil on the outermost layer or the titanium alloy sheet coated with the solder stop agent in the step 13) is slightly larger than that of the Ti foil, the Al foil and the titanium alloy sheet on the inner layer.
4. Ti-Al according to any of claims 1 to 3
3The preparation method of the Ti laminated composite material hollow sandwich structure is characterized in that the step 16) also comprises the step of placing the multilayer board in a mould with a curved surface shape, so that the generated Ti-Al
3The Ti layer and the die are attached to form a structure with a curved surface.
5. Ti-Al
3The preparation method of the Ti laminated composite material hollow sandwich structure is characterized in that the Ti foil, the Al foil and the titanium alloy sheet which are overlapped in a determined sequence are processed by a pneumatic hot-pressing compounding process to prepare the Ti-Al laminated composite material hollow sandwich structure
3Ti-Al laminated composite material is prepared by combining with superplastic forming/diffusion bonding technology
3A hollow sandwich structure of Ti laminated composite material;
the Ti-Al
3The preparation method of the Ti laminated composite material hollow sandwich structure specifically comprises the following steps:
21) selecting Ti foil, Al foil and titanium alloy thin plates with the same size, and cleaning the surfaces of the Ti foil, the Al foil and the titanium alloy thin plates;
22) taking a titanium alloy sheet coated with a solder stop agent according to a designed pattern, and oppositely attaching the surface with the solder stop agent to another titanium alloy sheet without the solder stop agent with the same specification;
23) sealing edges of the attached titanium alloy thin plate, reserving an inner air passage on the side surface, and welding an air pipe at the inner air passage;
24) placing the attached titanium alloy thin plate between two layers of Ti foils, then alternately stacking Al foils and Ti foils on two sides respectively, wherein the total thickness of the stacked titanium alloy thin plates on one side is the same as or slightly larger than the thickness of the middle titanium alloy thin plate, and the outermost layer is the Ti foil or the titanium alloy thin plate coated with a solder stop agent;
25) spot welding four corner points of the superposed multilayer board to prevent dislocation, then sealing and welding the periphery, reserving a first outer air channel at the positions of two laminated titanium alloy thin boards and the Ti foils at two sides on the opposite side of the inner air channel, reserving a second outer air channel between two outermost Ti foils or titanium alloy thin boards at the third side, and welding vent pipes at the reserved outer air channels;
26) vacuumizing and detecting the sealed multilayer board, if no air leakage exists, putting the sealed multilayer board into equipment, heating to 600-750 ℃, then applying 3-8 MPa of air pressure to the surface, preserving heat and pressure for 6-12 h, and enabling the Ti foil and the Al foil to fully react to generate Al
3A Ti layer;
27) raising the temperature of the furnace to 780-940 ℃, introducing 1.0-3.0 MPa of air pressure into the first outer air duct, maintaining the pressure and preserving the heat for 30 min-2 h to realize diffusion connection of the two middle titanium alloy sheets and simultaneously generate Ti-Al
3Attaching the Ti layered composite material to an externally arranged die;
28) applying 1.0-3.0 MPa of air pressure to the internal air passage, preserving heat and pressure for 1-2 h, forming two titanium alloy plates, and preparing Ti-Al
3The Ti laminated composite material is of a hollow sandwich structure.
6. Ti-Al according to claim 5
3The preparation method of the Ti laminated composite material hollow sandwich structure is characterized in that in the step 21), Kroll solution is adopted to carry out surface degreasing and acid pickling on Ti foil, Al foil and titanium alloy thin plates.
7. Ti-Al according to claim 6
3Ti layered compositeThe preparation method of the material hollow sandwich structure is characterized in that the size of the Ti foil or the titanium alloy sheet coated with the solder stop agent at the outermost layer in the step 24) is slightly larger than that of the Ti foil, the Al foil and the titanium alloy sheet at the inner layer.
8. Ti-Al according to any of claims 5 to 7
3The preparation method of the Ti laminated composite material hollow sandwich structure is characterized in that the step 27) also comprises the step of placing the multilayer board in a mould with a curved surface shape, so that the generated Ti-Al
3The Ti layer and the die are attached to form a structure with a curved surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611016006.3A CN108080804B (en) | 2016-11-18 | 2016-11-18 | Ti-Al 3Preparation method of Ti laminated composite material hollow sandwich structure |
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| CN108161346A (en) * | 2017-12-08 | 2018-06-15 | 北京星航机电装备有限公司 | A kind of Ti2The preparation method of AlNb/TA15 bimetallic titanium alloy composite hollow structures |
| CN109226952B (en) * | 2018-10-15 | 2021-02-02 | 中国航空制造技术研究院 | Method for forming hollow structure |
| CN109227045B (en) * | 2018-10-15 | 2020-06-23 | 中国航空制造技术研究院 | Method for forming three-layer hollow structure |
| CN109955042B (en) * | 2019-03-28 | 2020-12-11 | 中国航空制造技术研究院 | Preparation method of titanium alloy hollow structure |
| CN109955041B (en) * | 2019-03-28 | 2020-10-16 | 中国航空制造技术研究院 | Mould-free preparation method of titanium alloy hollow structure |
| CN110328495B (en) * | 2019-06-06 | 2021-07-30 | 南阳师范学院 | Ti2Method for producing AlNb-based alloy honeycomb structure, and Ti2AlNb-based alloy honeycomb structure |
| CN110860860B (en) * | 2019-12-03 | 2021-06-08 | 中国航空制造技术研究院 | Preparation method of metal ordered porous structure |
| CN111531335A (en) * | 2020-05-23 | 2020-08-14 | 北京普惠三航科技有限公司 | Multilayer structure and processing method thereof |
| CN113996906B (en) * | 2021-11-09 | 2022-07-26 | 南京航空航天大学 | Preparation method of multilayer board hollow structure containing layered composite material |
| CN116061537A (en) * | 2023-01-06 | 2023-05-05 | 江苏科技大学 | Ti/Al 3 Ti layered composite curved surface component preparation and forming integrated method |
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| US5330092A (en) * | 1991-12-17 | 1994-07-19 | The Boeing Company | Multiple density sandwich structures and method of fabrication |
| CN100361756C (en) * | 2005-06-22 | 2008-01-16 | 中国科学院金属研究所 | Process for preparing laminar composite of Ti-TiAl3 metal/intermetallic compound |
| CN102744928B (en) * | 2012-07-25 | 2014-09-24 | 哈尔滨工业大学 | Preparation method for Ti3Al-TiAl laminated composite material |
| CN102729575B (en) * | 2012-07-25 | 2014-08-13 | 哈尔滨工业大学 | Preparation method of TiAl-based laminar composite material plate |
| CN102990299B (en) * | 2012-11-21 | 2015-04-29 | 中国航空工业集团公司北京航空制造工程研究所 | Preparation method for X-type titanium alloy three-dimensional lattice sandwich structure |
| CN105414219B (en) * | 2015-12-31 | 2018-06-01 | 中国航空工业集团公司北京航空制造工程研究所 | A kind of preparation method of metal/intermetallic compound laminar composite |
| CN105414384B (en) * | 2015-12-31 | 2017-11-03 | 中国航空工业集团公司北京航空制造工程研究所 | A kind of preparation method of metal egg carton sandwich |
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