Method for manufacturing high-strength aluminum alloy through electric arc fuse wire additive

Abstract

The invention provides a method for manufacturing a high-strength aluminum alloy through arc fuse wire additive manufacturing, and belongs to the field of metal material arc fuse wire additive manufacturing. According to the method, the structural part is integrally modeled and then is subjected to arc fuse additive manufacturing, and when the structural part is subjected to arc fuse additive manufacturing, the deposited part is heated and subjected to heat preservation at a certain set temperature by adjusting related parameters of electromagnetic induction heating equipment every time one layer or a set number of layers are deposited, and in-situ solution treatment is carried out. And after in-situ solution treatment of the deposited part is completed, plastic deformation treatment is conducted on the deposited part through interlayer deformation equipment, the deformation amount of the deposited part serves as the standard, and after the set deformation amount is reached, interlayer deformation treatment is completed. And the arc fuse wire additive manufacturing, the in-situ solution treatment and the interlayer deformation treatment are circulated and repeated until integral manufacturing of the structural part is completed, finally, aging treatment is conducted on the integral structural part, and strengthening of the structural part is completed.

Description

Technical Field

[0001] The invention belongs to the field of arc fuse additive manufacturing of metal materials, and in particular is a method for additive manufacturing of high-strength aluminum alloy by arc fuse. Background Art

[0002] Arc fuse additive manufacturing technology uses electric arc as heat source and metal wire as raw material to complete the rapid forming of structural parts with the assistance of computers. Due to its advantages of high forming efficiency, low manufacturing cost, and no reliance on traditional molds, it has attracted much attention in the aerospace field in recent years. However, due to its layer-by-layer cladding process characteristics, obvious stratification and porosity defects will appear inside the structural parts. In addition, structural parts will inevitably experience a complex thermal history during the arc fuse additive manufacturing process, resulting in defects such as stress concentration, grain coarsening, and element segregation inside the structural parts. The existence of these defects seriously endangers the mechanical properties of the structural parts.

[0003] Interlaminar plastic deformation composite additive manufacturing technology is an effective means to improve the structural defects of aluminum alloys and enhance their mechanical properties. The interlaminar plastic deformation composite additive manufacturing method can obtain fine grain structure, realize dislocation strengthening of formed parts, and improve the mechanical properties of components. For heat-treatable and strengthened high-strength aluminum alloys, solution aging heat treatment is an indispensable post-treatment process to improve their mechanical properties. However, the additively manufactured structural parts after interlaminar deformation treatment will experience grain growth and softening during the subsequent high-temperature solution heat treatment, which significantly reduces or even eliminates the grain refinement and dislocation strengthening effects brought about by interlaminar deformation. Therefore, how to simultaneously retain the dislocation strengthening effect brought about by interlaminar plastic deformation and the precipitation strengthening effect brought about by solution aging heat treatment is the main measure to further improve the strength of aluminum alloy structural parts manufactured by arc fuse additive manufacturing. Summary of the invention

[0004] The purpose of the present invention is to propose a method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing. The method can perform in-situ solid solution treatment and interlayer deformation treatment on the deposited part in a segmented manner during the arc fuse additive manufacturing process, provide solid solution strengthening for the structural part, and then provide it with a work hardening effect, and then obtain an aluminum alloy structural part with sufficient precipitation strengthening and dislocation strengthening through subsequent overall low-temperature aging heat treatment, thereby significantly improving the strength of the structural part, promoting the homogenization of the structural part organization, weakening the residual stress of the structural part, and reducing the internal pore defects of the structural part.

[0005] The technical solution for achieving the purpose of the present invention is as follows: when the structural part is subjected to arc fuse additive manufacturing, after each layer or a set number of layers are deposited, the deposited part is heated and kept warm at a certain set temperature by adjusting the relevant parameters of the electromagnetic induction heating equipment, and an in-situ solid solution treatment is performed. After the deposited part has completed the in-situ solid solution treatment, it is subjected to plastic deformation treatment by an interlayer deformation device, with the deformation amount of the deposited part as the standard. When the set deformation amount is reached, the interlayer deformation treatment is completed. Arc fuse additive manufacturing, in-situ solid solution treatment, and interlayer deformation treatment are repeated until the overall manufacturing of the structural part is completed, and finally the overall structural part is subjected to aging treatment to complete the strengthening of the structural part.

[0006] A method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing comprises the following steps:

[0007] Step 1: After the overall modeling of the structural part is completed, it is sliced ​​and sliced ​​by a computer, and a forming trajectory is planned. The welding gun (5) is controlled by a robot to deposit layer by layer along the forming trajectory;

[0008] Step 2: After cleaning the surface of the substrate (2) and removing the surface oxide film, the substrate (2) is fixed on a workbench (1) in a cooling water tank (8), and is melted into a molten pool (7) by an electric arc under the protection of a shielding gas (4). The arc fuse additive manufacturing is performed along a set forming trajectory by a welding torch (5) to form a deposition layer;

[0009] Step 3: After depositing the set number of layers, remove the welding gun (5) and place the electromagnetic induction coil (14) outside the deposited part (3). The shape and size of the electromagnetic induction coil (14) are made according to the shape of the structural part, and the distance between the coil and the structural part is less than 20 mm. The corresponding parameters of the electromagnetic induction equipment are determined according to the material type of the selected structural part. The temperature range is between 450°C and 550°C, and the heating time is 1 hour to 2 hours. The deposited part (3) is heated to the set temperature range. The real-time temperature of the deposited part (3) is monitored by the temperature measuring device (12), and the temperature is maintained within the temperature range for a set time to start the in-situ solution treatment.

[0010] Step 4: After the in-situ solution treatment is completed, the electromagnetic induction coil (14) and the temperature measuring device (12) are immediately removed, and coolant is injected through the water inlet (9), and the height of the coolant level (13) is quickly adjusted to perform in-situ quenching treatment on the in-situ solution part;

[0011] Step 5: adjusting the cooling liquid level through the water outlet (10) and fixing it with the clamping device (11) so that the in-situ solid solution treated part (16) is exposed to the water surface again, and the height above the liquid surface does not exceed 5 mm, and then drying is performed; moving the interlayer deformation device (15) to the top of the deposited part (3), starting from one side, performing interlayer deformation treatment on the in-situ solid solution treated part (16) until the in-situ solid solution treated part (16) reaches the set deformation amount;

[0012] Step 6: Based on the deposited part that has completed the interlayer deformation process described in step 5, repeat steps 2 to 5 until the entire structure is manufactured;

[0013] Step 7: Perform aging heat treatment on the sample obtained in step 6. The aging temperature is determined according to the material alloy grade, the temperature range is between 100°C and 200°C, and the insulation time is between 12 hours and 24 hours. The precipitation strengthening of the structural parts is completed, the preparation of high-strength aluminum alloy is achieved, and the arc fuse additive manufacturing high-strength aluminum alloy is obtained.

[0014] Furthermore, the supply wire (6) of the structural part includes but is not limited to 2xxx series and 7xxx series aluminum alloys that can be solid solution strengthened; the length direction of the structural part does not exceed 500 mm, and the thickness does not exceed 50 mm;

[0015] The length and width of the substrate (2) are at least 100 mm greater than those of the structural component to facilitate clamping, the thickness of the substrate is not less than 20 mm, and the substrate material is a forged aluminum alloy plate of the same series as the arc fuse additive manufacturing structural component.

[0016] Furthermore, the thickness of the deposited layer in the arc fuse additive manufacturing process ranges from 1.0 mm to 3.0 mm, and the forming trajectory is planned by layered slicing software, deposited layer by layer, and changed according to actual conditions and requirements.

[0017] Furthermore, the parameter ranges of the arc fuse additive manufacturing high-strength aluminum alloy are: current 95A-230A, voltage 8.8V-16.7V, wire feeding speed 5m·min -1 -11m·min -1 , welding gun moving speed 5mm·s -1 -25mm·s -1 .

[0018] Furthermore, the height of the in-situ solid solution zone described in step 3 is one layer or multiple layers, and the height does not exceed 20 mm.

[0019] Furthermore, in the in-situ solution treatment method, the solution treatment temperature of the aluminum alloy ranges from 450°C to 550°C, and the holding time is 0.5h-3h, which can be adjusted according to the solution treatment technical standards of different alloys.

[0020] Furthermore, in the quenching method, the coolant includes but is not limited to water, oil, etc., the coolant temperature is between 0°C-25°C and the quenching time does not exceed 1 minute.

[0021] Furthermore, the time interval between the completion of the in-situ quenching treatment in step 4 and the start of the interlaminar deformation treatment in step 5 cannot exceed 2 minutes.

[0022] Furthermore, the interlayer deformation method includes but is not limited to roller rolling, mechanical forging, etc., and the thickness deformation of the deposited layer is 40%-60%.

[0023] Furthermore, the actuator of the interlayer deformation device is a six-axis articulated robot or a three-coordinate machine tool.

[0024] Furthermore, after the overall manufacturing of the structural component in step 6 is completed, the aging heat treatment described in step 7 is required to be performed within 5 hours.

[0025] Compared with the existing arc fuse additive manufacturing technology, the present invention has the following beneficial effects:

[0026] In the process of arc fuse additive manufacturing, the present invention performs in-situ solid solution treatment on the structural parts in sections, provides solid solution strengthening for the structural parts, improves the mechanical properties of the structural parts, and lays a foundation for subsequent heat treatment.

[0027] For heat-treatable strengthening aluminum alloys, the field of arc fuse additive manufacturing lacks a manufacturing method for in-situ solid solution composite interlayer deformation with strong applicability. The present invention performs in-situ solid solution treatment on the arc fuse additive manufacturing deposited layers layer by layer, then performs interlayer plastic deformation treatment on the deposited layers that have completed solid solution treatment, and finally performs aging treatment on the overall structural parts. It is possible to retain the grain refinement effect brought about by interlayer plastic deformation while achieving precipitation strengthening of the structural parts, thereby obtaining a high-strength aluminum alloy with better mechanical properties and more uniform and refined grain structure. The high-temperature solid solution treatment of the corresponding deposited layers has been completed before the interlayer deformation treatment, and the high-strength aluminum alloy can be prepared by the final overall low-temperature aging heat treatment, which avoids the damage to the strength of the components caused by the recrystallization softening phenomenon brought about by the overall high-temperature solid solution heat treatment of the structural parts after the traditional interlayer deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A flow chart of a method for additively manufacturing high-strength aluminum alloy using arc fuse;

[0029] Figure 2 Schematic diagram of the arc fuse additive manufacturing process;

[0030] Figure 3 Schematic diagram of in-situ solution treatment;

[0031] Figure 4 It is a schematic diagram of interlayer deformation processing;

[0032] In the figure, 1, workbench, 2, substrate, 3, deposited part, 4, shielding gas, 5, welding gun, 6, supply wire, 7, molten pool, 8, cooling water tank, 9, water inlet, 10, water outlet, 11, clamping device, 12, temperature measuring device, 13, cooling liquid level, 14, electromagnetic induction coil, 15, interlayer deformation device, 16, in-situ solid solution part. DETAILED DESCRIPTION

[0033] The present invention is further described below with reference to the accompanying drawings and examples.

[0034] Example 1

[0035] A method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing, such as Figure 1 As shown, the following steps are included:

[0036] (1) After the overall modeling of the structural part with a size of 180*200*10 mm, it is sliced ​​by professional layering and slicing software, and the layer height of each layer is set to 2 mm. The "zigzag" forming trajectory is planned, and the program code is generated. The code is imported into the KUKA six-axis robot and the Fronius TPS4000 CMT welding machine. Under the control of the robot, the welding gun 5 sinks layer by layer along the forming trajectory;

[0037] (2) Figure 2 As shown, a 2219 aluminum alloy with a size of 200*200*20 mm is used as a substrate 2. After its surface is cleaned and the surface oxide film is removed, it is fixed on a workbench 1 in a cooling water tank 8.

[0038] (3) Figure 2 As shown, the dried ZL205A supply wire 6 with a diameter of 1.2 mm is melted into a molten pool 7 by the arc under the protection of the shielding gas 4, and follows the welding gun 5 along the set forming trajectory to perform arc fused wire additive manufacturing to form a deposition layer. The corresponding parameters of the robot and the welding machine are: current 220A, voltage 15V, wire feeding speed 8m·min -1 , the moving speed of welding gun 5 is 20 mm·s -1 .

[0039] (4) Figure 3As shown, after depositing five layers (10 mm high), the welding gun 5 is removed and the electromagnetic induction coil 14 is placed on the outside of the deposited part 3. The electromagnetic induction coil 14 is designed to be a rectangle in the middle and semicircular on both sides. The diameter of a single coil is 4 mm and the number of turns is 3.

[0040] (5) After cooling water is passed through the electromagnetic induction coil 14, the current and voltage of the electromagnetic induction device are adjusted to heat the deposited part to 538°C. The real-time temperature of the deposited part 3 is monitored by the temperature measuring device 12, and the temperature is always maintained within the range of ±5°C of 538°C by adjusting the current and voltage of the electromagnetic induction device. When the temperature is lower than 533°C, heating is performed. When the temperature is higher than 543°C, heating is stopped and the temperature is kept within this temperature range for 30 minutes to complete the in-situ solution treatment.

[0041] (6) After the in-situ solution treatment is completed, the temperature measuring device 12 and the electromagnetic induction coil 14 are immediately removed, and coolant is injected through the water inlet 9. The position of the coolant level 13 is quickly adjusted so that the coolant level 13 completely immerses the in-situ solution-treated portion 16 within 1 minute, and the in-situ quenching treatment is performed on the in-situ solution-treated portion 16.

[0042] (7) The height of the coolant level 13 is adjusted through the water outlet 10 and fixed with the clamping device 11 so that the in-situ solid solution portion 16 that has completed quenching is exposed to the water surface again, and the coolant remaining on the surface is removed so that the surface of the in-situ solid solution portion 16 is in a dry state.

[0043] (8) Figure 4 As shown, within 2 minutes after the in-situ solution treatment is completed, the interlayer deformation device 15 is moved to 2 mm above the in-situ solution-treated portion 16, and starting from the right side, the in-situ solution-treated portion 16 is subjected to interlayer deformation treatment until the in-situ solution-treated portion 17 reaches a deformation amount of 60%.

[0044] (9) Based on the part that has completed the in-situ solution treatment and interlaminar deformation treatment, repeat steps (3) to (8) until the entire structure is manufactured.

[0045] (10) One hour after the overall manufacturing of the structural component is completed, the composite aluminum alloy overall structure is subjected to aging heat treatment at an aging temperature of 175° C. and a holding time of 4 hours.

[0046] Example 2

[0047] (1) After the overall modeling of the structural part with a size of 150*180*10 mm, it was sliced ​​by professional layering and slicing software, with the layer height of each layer set to 2 mm, and a "zigzag" forming trajectory was planned to generate program code. The code was imported into the KUKA six-axis robot and the Fronius TPS4000 CMT welding machine. Under the control of the robot, the welding gun 5 was deposited layer by layer along the forming trajectory.

[0048] (2) Figure 2 As shown, a 2219 aluminum alloy with a size of 200*200*20 mm is used as a substrate 2. After its surface is cleaned and the surface oxide film is removed, it is fixed on a workbench 1 in a cooling water tank 8.

[0049] (3) Figure 2 As shown, the 2219 supply wire 6 with a diameter of 1.2 mm after drying is melted into a molten pool 7 by the arc under the protection of the shielding gas 4, and follows the welding gun 5 along the set forming trajectory to perform arc fused wire additive manufacturing to form a deposition layer. The corresponding parameters of the robot and the welding machine are: current 220A, voltage 15V, wire feeding speed 7m·min -1 , the moving speed of welding gun 5 is 0.5m·min -1 .

[0050] (4) Figure 3 As shown, after depositing five layers (10 mm high), the welding gun 5 is removed and the electromagnetic induction coil 14 is placed on the outside of the deposited part 3. The electromagnetic induction coil 14 is designed to be a rectangle in the middle and semicircular on both sides. The diameter of a single coil is 4 mm and the number of turns is 3.

[0051] (5) After cooling water is passed through the electromagnetic induction coil 14, the current and voltage of the electromagnetic induction device are adjusted to heat the deposited part to 545°C. The real-time temperature of the deposited part 3 is monitored by the temperature measuring device 12, and the temperature is always maintained within the range of ±5°C of 545°C by adjusting the current and voltage of the electromagnetic induction device. When the temperature is lower than 540°C, heating is performed. When the temperature is higher than 550°C, heating is stopped and the temperature is kept within this temperature range for 120 minutes to complete the in-situ solution treatment.

[0052] (6) After the in-situ solution treatment is completed, the temperature measuring device 12 and the electromagnetic induction coil 14 are immediately removed, and coolant is injected through the water inlet 9. The position of the coolant level 13 is quickly adjusted so that the coolant level 13 completely immerses the in-situ solution-treated portion 16 within 1 minute, and the in-situ quenching treatment is performed on the in-situ solution-treated portion 16.

[0053] (7) The height of the coolant level 13 is adjusted through the water outlet 10 and fixed with the clamping device 11 so that the in-situ solid solution portion 16 that has completed quenching is exposed to the water surface again, and the coolant remaining on the surface is removed so that the surface of the in-situ solid solution portion 16 is in a dry state.

[0054] (8) Figure 4 As shown, within 2 minutes after the in-situ solutionizing is completed, the interlayer deformation device 15 is moved to 2 mm above the in-situ solutionized portion 16, and starting from the right side, the in-situ solutionized portion 16 is subjected to interlayer deformation treatment until the in-situ solutionized portion 16 reaches a deformation amount of 60%.

[0055] (9) Based on the part that has completed the in-situ solution treatment and interlaminar deformation treatment, repeat steps (3) to (8) until the entire structure is manufactured.

[0056] (10) One hour after the overall manufacturing of the structural component is completed, the composite aluminum alloy overall structure is subjected to aging heat treatment at an aging temperature of 185° C. and a heat preservation time of 16 hours.

[0057] Example 3

[0058] (1) After the overall modeling of the structural part with a size of 120*150*10 mm, it was sliced ​​by professional layering and slicing software, with the height of each layer set to 2 mm. The "zigzag" forming trajectory was planned, and the program code was generated. The code was imported into the KUKA six-axis robot and the Fronius TPS4000 CMT welding machine. Under the control of the robot, the welding gun 5 was deposited layer by layer along the forming trajectory.

[0059] (2) Figure 2 As shown, a 7075 aluminum alloy with a size of 200*200*20 mm is used as a substrate 2. After its surface is cleaned and the surface oxide film is removed, it is fixed on a workbench 1 in a cooling water tank 8.

[0060] (3) Figure 2 As shown, the 7075 supply wire 6 with a diameter of 1.2 mm after drying is melted into a molten pool 7 by the arc under the protection of the shielding gas 4, and follows the welding gun 5 along the set forming trajectory to perform arc fused wire additive manufacturing to form a deposition layer. The corresponding parameters of the robot and the welding machine are: current 220A, voltage 15V, wire feeding speed 6.5m·min -1 , the moving speed of welding gun 5 is 9 mm·s -1 .

[0061] (4) Figure 3As shown, after depositing five layers (10 mm high), the welding gun 5 is removed and the electromagnetic induction coil 14 is placed on the outside of the deposited part 3. The electromagnetic induction coil 14 is designed to be a rectangle in the middle and semicircular on both sides. The diameter of a single coil is 4 mm and the number of turns is 3.

[0062] (5) After cooling water is passed through the electromagnetic induction coil 14, the current and voltage of the electromagnetic induction device are adjusted to heat the deposited part to 470°C. The real-time temperature of the deposited part 3 is monitored by the temperature measuring device 12, and the temperature is always maintained within the range of ±5°C of 470°C by adjusting the current and voltage of the electromagnetic induction device. When the temperature is lower than 465°C, heating is performed. When the temperature is higher than 475°C, heating is stopped and the temperature is kept within this temperature range for 150 minutes to complete the in-situ solution treatment.

[0063] (6) After the in-situ solution treatment is completed, the temperature measuring device 12 and the electromagnetic induction coil 14 are immediately removed, and coolant is injected through the water inlet 9. The position of the coolant level 13 is quickly adjusted so that the coolant level 13 completely immerses the in-situ solution-treated portion 16 within 1 minute, and the in-situ quenching treatment is performed on the in-situ solution-treated portion 16.

[0064] (7) The height of the coolant level 13 is adjusted through the water outlet 10 and fixed with the clamping device 11 so that the in-situ solid solution portion 16 that has completed quenching is exposed to the water surface again, and the coolant remaining on the surface is removed so that the surface of the in-situ solid solution portion 16 is in a dry state.

[0065] (8) Figure 4 As shown, within 2 minutes after the in-situ solutionizing is completed, the interlayer deformation device 15 is moved to 2 mm above the in-situ solutionized portion 16, and starting from the right side, the in-situ solutionized portion 16 is subjected to interlayer deformation treatment until the in-situ solutionized portion 16 reaches a deformation amount of 60%.

[0066] (9) Based on the part that has completed the in-situ solution treatment and interlaminar deformation treatment, repeat steps (3) to (8) until the entire structure is manufactured.

[0067] (10) One hour after the overall manufacturing of the structural component is completed, the composite aluminum alloy overall structure is subjected to aging heat treatment at an aging temperature of 120° C. for a holding time of 24 hours.

[0068] The examples described above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing, characterized in that: The following steps are involved: Step 1: After the overall modeling of the structural part is completed, it is sliced ​​and sliced ​​by a computer, and a forming trajectory is planned. The welding gun (5) is controlled by a robot to deposit layer by layer along the forming trajectory; Step 2: After cleaning the surface of the substrate (2) and removing the surface oxide film, the substrate (2) is fixed on a workbench (1) in a cooling water tank (8), and is melted into a molten pool (7) by an electric arc under the protection of a shielding gas (4). The arc fuse additive manufacturing is performed along a set forming trajectory by a welding torch (5) to form a deposition layer; Step 3: After depositing the set number of layers, remove the welding gun (5) and place the electromagnetic induction coil (14) outside the deposited part (3). The shape and size of the electromagnetic induction coil (14) are made according to the shape of the structural part, and the distance between the coil and the structural part is less than 20 mm. The corresponding parameters of the electromagnetic induction equipment are determined according to the material type of the selected structural part. The temperature range is between 450°C and 550°C, and the heating time is 1 hour to 2 hours. The deposited part (3) is heated to the set temperature range. The real-time temperature of the deposited part (3) is monitored by the temperature measuring device (12), and the temperature is maintained within the temperature range for a set time to start the in-situ solution treatment. Step 4: After the in-situ solution treatment is completed, the electromagnetic induction coil (14) and the temperature measuring device (12) are immediately removed, and coolant is injected through the water inlet (9), and the height of the coolant level (13) is quickly adjusted to perform in-situ quenching treatment on the in-situ solution part; Step 5: The cooling liquid level is adjusted through the water outlet (10), and the cooling liquid level is fixed by the clamping device (11) so that the in-situ solution treated part (16) is exposed to the water surface again, and the height of the exposed liquid level does not exceed 5 mm, and then the cooling liquid level is dried; The interlayer deformation device (15) is moved above the deposited portion (3), and the in-situ solution treated portion (16) is subjected to interlayer deformation treatment starting from one side until the in-situ solution treated portion (16) reaches a set deformation amount; Step 6: Based on the deposited part that has completed the interlayer deformation process described in step 5, repeat steps 2 to 5 until the entire structure is manufactured; Step 7: Perform aging heat treatment on the sample obtained in step 6. The aging temperature is determined according to the material alloy grade, the temperature range is between 100°C and 200°C, and the insulation time is between 12 hours and 24 hours. The precipitation strengthening of the structural parts is completed, the preparation of high-strength aluminum alloy is achieved, and the arc fuse additive manufacturing high-strength aluminum alloy is obtained.

2. The method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing according to claim 1, characterized in that: The supply wire (6) of the structural part includes but is not limited to 2xxx series and 7xxx series aluminum alloys that can be solid solution strengthened; the length direction of the structural part does not exceed 500mm, and the thickness does not exceed 50mm; The length and width of the substrate (2) are at least 100 mm greater than those of the structural component to facilitate clamping, the thickness of the substrate is not less than 20 mm, and the substrate material is a forged aluminum alloy plate of the same series as the arc fuse additive manufacturing structural component.

3. The method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing according to claim 1, characterized in that: The thickness of the deposited layer in the arc fuse additive manufacturing process ranges from 1.0 mm to 3.0 mm. The forming trajectory is planned by layered slicing software, deposited layer by layer, and changed according to actual conditions and requirements.

4. The method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing according to claim 1, characterized in that: The parameter range of the arc fuse additive manufacturing high-strength aluminum alloy is: current 95A-230A, voltage 8.8V-16.7V, wire feeding speed 5m·min -1 -11m·min -1 , welding gun moving speed 5mm·s -1 -25mm·s -1 .

5. The method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing according to claim 1, characterized in that: The height of the in-situ solid solution zone described in step 3 is one layer or multiple layers, and the height does not exceed 20 mm.

6. The method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing according to claim 1, characterized in that: In the in-situ solution treatment method, the solution treatment temperature of the aluminum alloy ranges from 450°C to 550°C, and the holding time is 0.5h-3h, which can be adjusted according to the solution treatment technical standards of different alloys.

7. The method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing according to claim 1, characterized in that: The quenching method described above includes coolants including but not limited to water, oil, etc. The coolant temperature is between 0°C and 25°C and the quenching time does not exceed 1 minute.

8. The method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing according to claim 1, characterized in that: The time interval between the completion of the in-situ quenching treatment described in step 4 and the start of the interlayer deformation treatment described in step 5 cannot exceed 2 minutes.

9. The method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing according to claim 1, characterized in that: The interlayer deformation method includes but is not limited to roller rolling, mechanical forging and the like, and the thickness deformation of the deposited layer is 40%-60%.

10. The method for manufacturing high-strength aluminum alloy by arc fuse additive manufacturing according to claim 1, characterized in that: After the overall manufacturing of the structural component in step 6 is completed, the aging heat treatment described in step 7 is required to be performed within 5 hours.

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