Aluminum alloy fan outlet guide vane and forging method thereof

Abstract

The invention discloses an aluminum alloy fan outlet guide vane and a forging method thereof.The forging method comprises the steps that an aluminum alloy bar is subjected to upsetting forging to obtain an upsetting piece; performing pre-forging on the top forging piece to obtain a pre-forging piece; and performing finish forging on the pre-forged piece to obtain the fan outlet guide vane. Compared with an existing preparation process, mechanical properties including tensile strength, yield strength and the like of the fan outlet guide vane can be improved.

Description

Technical Field

[0001] The present application belongs to the field of metal forging technology, and specifically relates to an aluminum alloy fan outlet guide vane and a forging method thereof. Background Art

[0002] The fan outlet guide vane is also called the fan duct outlet guide vane, which is located downstream of the fan rotor blades and adjacent to the fan rotor blades. At present, most 2219 aluminum alloy fan outlet guide vanes are cold compressed using die forging dies, and cold compression deformation is performed in die forging equipment, which cannot guarantee the cold compression deformation required by the standard (2-5%). Insufficient cold compression deformation will result in room temperature tensile yield strength that is difficult to meet the standard. Summary of the invention

[0003] The main purpose of the present application is to provide a method for forging an aluminum alloy fan outlet guide vane, aiming to solve the problem that the fan outlet guide vane prepared by the existing method has unqualified tensile yield strength.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] A method for forging an aluminum alloy fan outlet guide vane comprises: performing top forging on an aluminum alloy bar to obtain a top forging; performing pre-forging on the top forging to obtain a pre-forging;

[0006] The pre-forged part is subjected to final forging to obtain a fan outlet guide vane.

[0007] Optionally, the top forging of the aluminum alloy bar to obtain the top forging includes: heating the aluminum alloy bar at a first starting forging temperature; placing the heated aluminum alloy bar in a preheated top forging die for a first top forging, and obtaining an intermediate billet of the top forging after cooling to room temperature; continuing to heat the intermediate billet of the top forging at the first starting forging temperature, placing the heated intermediate billet of the top forging in a preheated top forging die for a second top forging, and obtaining the top forging after cooling to room temperature.

[0008] Optionally, the preheating temperature of the top forging die is 150-200°C.

[0009] Optionally, the top forging is subjected to pre-forging to obtain the pre-forging, including: heating the top forging at a second starting forging temperature; placing the heated top forging in a preheated pre-forging die for pre-forging, and cooling to room temperature after forging to obtain the pre-forging.

[0010] Optionally, the pre-forging is subjected to final forging to obtain a fan outlet guide vane, comprising: heating the pre-forging at a third initial forging temperature; placing the heated pre-forging in a preheated final forging die for final forging, and cooling to room temperature after forging to obtain a fan outlet guide vane.

[0011] Optionally, the preheating temperature of the pre-forging die and the final forging die is 300-350°C.

[0012] Optionally, after obtaining the fan outlet guide vane, the fan outlet guide vane needs to be subjected to a solution treatment.

[0013] Optionally, the fan outlet guide vanes after the solution treatment need to be cold pressed.

[0014] Optionally, the fan outlet guide vanes after the cold pressing treatment need to be subjected to aging treatment.

[0015] In addition, the present application also provides an aluminum alloy fan outlet guide vane, which includes: a guide vane body, one side of the guide vane body is integrally connected with a blade root, the other side of the guide vane body is integrally connected with a blade tip, the blade root is integrally connected with a first boss, the blade tip is integrally connected with a second boss, and the first boss and the second boss are symmetrically arranged.

[0016] This application can bring the following beneficial effects:

[0017] 1. The yield strength and tensile strength of the fan outlet guide vane can be significantly improved through solution treatment, cold compression treatment and aging treatment.

[0018] 2. By preheating the mold metal, the uneven shrinkage of the material during the cooling process can be reduced, thereby improving the dimensional accuracy and shape stability of the fan outlet guide vane.

[0019] 3. By controlling the forging temperature, the oxidation reaction on the material surface can be reduced, the formation of oxide scale can be avoided, and the surface quality of the forging can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a process of forging an aluminum alloy fan outlet guide vane provided in one embodiment of the present application;

[0021] Figure 2 is a schematic diagram of an intermediate blank of a top forging provided in another embodiment of the present application;

[0022] Figure 3 is a schematic diagram of a top forging provided in another embodiment of the present application;

[0023] Figure 4is a schematic diagram of a pre-forging provided in another embodiment of the present application;

[0024] Figure 5 It is a schematic diagram of a fan outlet guide vane provided in another embodiment of the present application.

[0025] The following are the descriptions of the reference numerals:

[0026] 1. Guide vane body; 2. Blade root; 3. First boss; 4. Blade tip; 5. Second boss. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Figure 1 FIG. 1 is a flow chart of a method for forging an outlet guide vane of an aluminum alloy fan according to an embodiment of the present application, as shown in FIG. Figure 1 As shown, the method comprises the following steps:

[0032] S1: Place an aluminum alloy extrusion bar with an outer dimension of 600×250×100mm, a weight of 22kg and a specification of Φ110×840mm (for example, 2219 aluminum alloy extrusion bar) in an electric furnace and heat it to the first initial forging temperature of 450°C and keep it warm for 220 minutes. After being taken out of the furnace, place it in a preheated (preheating temperature is 150°C) upsetting die for the first fire upsetting. After the first fire upsetting, air cool it to room temperature to obtain the following: Figure 2 The intermediate billet of the top forging is shown; then the intermediate billet of the top forging is heated again to the first starting forging temperature of 450°C and kept at this temperature for 220 minutes, and then placed in a preheated (preheating temperature is 150°C) top forging die for the second fire top forging, and the top forging can be obtained as shown. Figure 3 Head forging shown.

[0033] In this step, when the unpreheated upsetting die suddenly contacts the high-temperature material, a large temperature difference will be generated, resulting in thermal stress inside the die material. This thermal stress may cause microcracks on the surface or inside of the upsetting die, or even cause the die to crack. By preheating the die, the thermal shock caused by the temperature difference in the die can be reduced, thereby extending the service life of the die. In addition, preheating the upsetting die can also reduce the uneven shrinkage of the material during the cooling process, thereby improving the dimensional accuracy and shape stability of the fan outlet guide vane. However, according to experiments, the preheating temperature of the upsetting die cannot be lower than 150°C. If the preheating temperature is too low (lower than 150°C), the temperature difference between the upsetting die and the material is large, which will cause the die to be subjected to a large thermal shock, thereby increasing the risk of damage to the upsetting die. In addition, if the temperature of the upsetting die is too low, the material will cool rapidly after entering the die, affecting the fluidity of the material, and causing the material to be unable to completely fill the die cavity, resulting in incomplete shape of the forging or excessive dimensional deviation.

[0034] S2: The top forging is placed in an electric furnace and heated to the second initial forging temperature of 450°C and kept warm for 280 minutes. After being taken out of the furnace, the top forging is placed in a preheated (preheating temperature is 300°C) pre-forging die for pre-forging. After forging is completed, the top forging is air-cooled to room temperature to obtain Figure 4 Preforging shown.

[0035] S3: The pre-forged piece is placed in an electric furnace and heated to the third initial forging temperature of 450°C and kept at this temperature for 200 minutes. After being taken out of the furnace, the pre-forged piece is placed in a preheated final forging die (preheating temperature is 300°C) for final forging. After forging is completed, the pre-forged piece is air-cooled to room temperature to obtain the following Figure 5 Fan outlet guide vanes shown.

[0036] In step S2 and step S3, the preheating temperature of the pre-forging die and the final forging die cannot be lower than 300°C. If the temperature is too low, firstly, the temperature difference between the die and the high-temperature material will be too large, which may cause cracks on the surface or inside of the die; secondly, the material will cool down rapidly after entering the die, affecting the fluidity of the material and increasing the generation of defects such as pores and cracks, thereby affecting the molding quality of the final product.

[0037] In another exemplary embodiment, the present application also provides a forging method for an aluminum alloy fan outlet guide vane, the method comprising the following steps:

[0038] S10: Place a 2219 aluminum alloy extruded bar with an outer dimension of 600×250×100mm, a weight of 22kg and a specification of Φ110×840mm in an electric furnace, heat it to a first starting forging temperature of 470°C and keep it warm for 220 minutes, then place it in a preheated (preheating temperature is 200°C) upsetting die for a first upsetting, and air cool it to room temperature after the first upsetting to obtain an intermediate billet for upsetting; then heat the intermediate billet for upsetting to a first starting forging temperature of 470°C again and keep it warm for 220 minutes, then place it in a preheated (preheating temperature is 200°C) upsetting die for a second upsetting to obtain an upsetting.

[0039] In this step, the preheating temperature of the upset die cannot be higher than 200°C. If the preheating temperature is too high (more than 200°C), the temperature difference between the upset die and the material will be further reduced, but this will also cause the die temperature to approach or exceed the initial forging temperature of the material, thereby affecting the fluidity of the material and causing poor filling of the material in the die. In addition, too high a die temperature will also cause the material to stay in the die for too long, increasing the possibility of oxidation on the material surface and affecting the surface quality of the final product.

[0040] S20: placing the top forging in an electric furnace and heating it to a second initial forging temperature of 470° C. and keeping it warm for 280 minutes; after being taken out of the furnace, placing the top forging in a preheated (preheating temperature is 350° C.) pre-forging mold for pre-forging; after forging is completed, air cooling is performed to room temperature to obtain the pre-forging.

[0041] S30: placing the pre-forged piece in an electric furnace and heating it to the third initial forging temperature of 470°C and keeping it warm for 200 minutes. After being taken out of the furnace, placing the pre-forged piece in a preheated (preheating temperature is 350°C) final forging die for final forging. After forging is completed, air is cooled to room temperature to obtain a fan outlet guide vane.

[0042] In step S20 and step S30, the preheating temperature of the pre-forging die and the final forging die cannot be higher than 350°C. Experiments have shown that if the temperature is higher than 350°C, firstly, it will cause greater thermal stress inside the pre-forging die and the final forging die, increasing the risk of die cracking; secondly, the die temperature is too high, causing the material to heat up rapidly after entering the die, resulting in poor material fluidity and failure to fully fill the die cavity, thereby affecting the shape and dimensional accuracy of the forging; thirdly, if the temperature is too high, it will cause the grains inside the material to grow rapidly, and the coarse grains will reduce the strength and toughness of the material, thereby affecting the mechanical properties of the fan outlet guide vane.

[0043] Therefore, the preheating temperature of the pre-forging die and the final forging die is set between 300 and 350°C. Firstly, the temperature difference between the die and the high-temperature material can be kept within a reasonable range, thereby reducing the thermal stress generated inside the die material and minimizing the risk of cracking of the die due to thermal stress; secondly, the surface and internal temperatures of the die are made more uniform to avoid overheating or overcooling, which helps the material flow more evenly in the die and reduces the occurrence of poor filling and defects, thereby maximizing the dimensional accuracy and shape stability of the fan outlet guide vane.

[0044] In another exemplary embodiment, the burrs of the pre-forging obtained after the pre-forging and the fan outlet guide vane obtained after the final forging need to be machined to be removed.

[0045] In this embodiment, during the forging process, when the material flows in the die, excess metal parts, i.e., burrs, may be formed at the edges. These burrs will affect the dimensional accuracy of the forgings. By removing the burrs through machining, it can be ensured that the size and shape of the forgings meet the design requirements. In addition, the burrs are prone to become stress concentration areas, which may cause fatigue cracks. By removing the burrs, these potential stress concentration points can be reduced, thereby improving the fatigue strength and service life of the fan outlet guide vanes.

[0046] In another exemplary embodiment, after the fan outlet guide vane is obtained, it is necessary to perform a solution treatment, a cold compression treatment and an aging treatment on the fan outlet guide vane.

[0047] In this embodiment, the fan outlet guide vane is subjected to a solution treatment, including: heating the fan outlet guide vane in an electric furnace at 529-541°C, keeping the temperature at this temperature for 4-5 hours, and cooling the fan outlet guide vane with water (water temperature ≤ 30°C) to room temperature. At a high temperature of 529-541°C, the second phase (such as Mg2Si, CuAl2, etc.) in the fan outlet guide vane will dissolve into the matrix to form a uniform solid solution. Through the solution treatment, the distribution of alloy elements in the matrix becomes more uniform, which can eliminate the uneven structure formed during the casting or forging process, thereby improving the comprehensive performance of the fan outlet guide vane. In addition, through the solution treatment, since the distribution of alloy elements in the matrix is ​​more uniform and the grains are refined, the yield strength, tensile strength and plasticity of the fan outlet guide vane can be improved, making it easier to form and use in subsequent processing. The cold compression treatment of the fan outlet guide vane after the solution treatment includes: placing the fan outlet guide vane in a special cold compression mold (using a special cold compression mold, the mold has a certain gap, which can accommodate the deformation caused by the cold compression of the forging, so that the forging can quickly reach the required cold deformation), and completing the cold compression deformation in a hydraulic press, and the deformation is 2% to 5%. Through the cold compression treatment, the yield strength and tensile strength of the fan outlet guide vane can be significantly improved. This is because during the cold compression process, the lattice inside the fan outlet guide vane will undergo dislocation proliferation and slip, resulting in grain refinement, thereby improving the strength of the fan outlet guide vane. In addition, the cold compression treatment can further refine the grains of the fan outlet guide vane, making the grains more uniform and fine, and the fine grains can improve the plasticity and toughness of the fan outlet guide vane, and also help to improve the strength of the fan outlet guide vane. Further, the cold compression treatment can also make the microstructure inside the fan outlet guide vane more uniform, eliminate local unevenness, and thus improve the overall performance of the fan outlet guide vane. It should be noted that, according to tests, controlling the deformation within 2% to 5% can ensure that the fan outlet guide vanes will not produce excessive plastic deformation or cracks while improving the strength.

[0048] The aging treatment of the fan outlet guide vane after cold compression treatment includes: putting the fan outlet guide vane into the furnace at 177°C, keeping it warm for 18 hours, and cooling the air out of the furnace to room temperature. Through the aging treatment, certain solute atoms (such as magnesium, copper, etc.) inside the fan outlet guide vane will precipitate from the solid solution to form fine second phase particles, which can hinder the movement of dislocations, thereby improving the strength and hardness of the fan outlet guide vane. The precipitated fine second phase particles are distributed throughout the matrix, forming a dispersion strengthening effect, which can further improve the yield strength and tensile strength of the fan outlet guide vane. In addition, the fine second phase particles can also reduce the defects and stress concentration points inside the fan outlet guide vane, thereby improving the fatigue performance of the fan outlet guide vane and extending its service life. Furthermore, residual stress may be generated inside the fan outlet guide vane during the cold compression process. Through aging treatment, these residual stresses can be released, thereby improving the dimensional stability and shape stability of the fan outlet guide vane.

[0049] In the above embodiment, the present application preheats the top forging die, pre-forging die and final forging die before forging, the purpose is: 1. Reduce thermal shock: When the unpreheated die suddenly contacts the high-temperature material, a large temperature difference will be generated, which will cause thermal stress inside the die material. This thermal stress will cause micro cracks on the surface or inside of the die, and even cause the die to crack. By preheating, the thermal shock caused by the temperature difference of the die can be reduced, thereby extending the service life of the die. 2. Improve the fluidity of the aluminum alloy material: Preheating the die can make the surface and internal temperature of the die more uniform, avoid local overheating or overcooling, help the material flow more evenly in the die, and reduce the generation of poor filling and defects. After the die is preheated, the temperature difference between the material and the die surface is reduced, which can reduce the possibility of material adhesion to the die, thereby improving the demolding effect. 3. Improve the molding accuracy: Preheating the die can reduce the uneven shrinkage of the material during the cooling process, thereby improving the dimensional accuracy and shape stability of the fan outlet guide vane. In addition, preheating the mold can ensure that the material is filled more fully and evenly in the mold, reduce the generation of defects such as pores and cracks, and improve the molding quality of the final product.

[0050] In the above embodiment, the first forging temperature, the second forging temperature and the third forging temperature are all set to 450°C to 470°C. The reason is that within this temperature range, the 2219 aluminum alloy has good plasticity, is easy to deform, and can better fill the mold, thereby obtaining a forging with accurate shape and stable size. In addition, within this temperature range, it is also helpful to control the grain refinement inside the 2219 aluminum alloy material and avoid the formation of coarse grains, thereby improving the mechanical properties of the fan outlet guide vane, especially the tensile strength and yield strength. It should be noted that, through experimental tests, if the first initial forging temperature, the second initial forging temperature and the third initial forging temperature are higher than 470°C, firstly, the internal grains of the 2219 aluminum alloy will grow rapidly, and the coarse grains will reduce the strength and toughness of the material, affecting the mechanical properties of the fan outlet guide vane; secondly, the surface of the 2219 aluminum alloy is prone to severe oxidation reaction, thereby forming oxide scale, which not only affects the surface quality of the forging, but also increases the difficulty of subsequent processing; thirdly, if the temperature is too high, the thermal stress and residual stress of the 2219 aluminum alloy will increase, and thermal cracks will easily occur, thereby affecting the overall quality and reliability of the fan outlet guide vane. In addition, since the plasticity of the 2219 aluminum alloy is poor and it is not easy to deform, therefore, if the first initial forging temperature, the second initial forging temperature and the third initial forging temperature are lower than 450°C, firstly, it is easy to cause the 2219 aluminum alloy to crack or break, resulting in forging failure; secondly, it is difficult for the 2219 aluminum alloy to completely fill the mold cavity, which may cause the forging shape to be incomplete or the size deviation to be too large. In summary, the present application sets the first to third initial forging temperatures between 450°C and 470°C, with the aim of balancing the plastic fluidity and microstructural stability of the 2219 aluminum alloy, ensuring a smooth forging process, and ultimately obtaining high-quality 2219 aluminum alloy fan outlet guide vanes.

[0051] Next, the present application conducted room temperature tensile tests on the 2219 aluminum alloy fan outlet guide vanes obtained through the above steps and the 2219 aluminum alloy fan outlet guide vanes obtained by forging based on the existing method. The test results are shown in Table 1 and Table 2 respectively:

[0052] Table 1

[0053]

[0054]

[0055] Table 2

[0056]

[0057] As can be seen from Table 1, the tensile strength values ​​of all samples are between 448MPa and 465MPa, with an average value close to 457MPa, which is much higher than the standard requirements of 427MPa (L direction) and 427MPa (LT direction). The yield strength values ​​of all samples are between 344MPa and 357MPa, with an average value close to 352MPa, which meets and exceeds the standard requirements of 345MPa (L direction) and 338MPa (LT direction). The elongation values ​​of all samples are mostly between 6.7% and 14.8%, with only a few samples slightly lower than the standard requirements of 6% (L direction) and 4% (LT direction).

[0058] As can be seen from Table 2, the tensile strength values ​​of all samples are between 401MPa and 456MPa, and some samples do not meet the standard requirements of 427MPa (L direction) and 427MPa (LT direction). The yield strength values ​​of all samples are between 313MPa and 346MPa, and many samples do not meet the standard requirements of 345MPa (L direction) and 338MPa (LT direction). The elongation values ​​of all samples are between 9.0% and 17.7%. Although the elongation of most samples meets the standard requirements, the yield strength and tensile strength are generally low.

[0059] In summary, it can be seen from Table 1 and Table 2 that the aluminum alloy fan outlet guide vane forging method proposed in this application has obvious advantages in improving the mechanical properties of the product, and can better meet the standard requirements and actual application needs.

[0060] In another exemplary embodiment, the present application also provides an aluminum alloy fan outlet guide vane, such as Figure 5 As shown, the aluminum alloy fan outlet guide vane includes: a guide vane body 1, a blade root 2 is integrally connected to one side of the guide vane body 1, a blade tip 4 is integrally connected to the other side of the guide vane body 1, the blade root 2 is integrally connected to a first boss 3, the blade tip 4 is integrally connected to a second boss 5, and the first boss 3 and the second boss 5 are symmetrically arranged.

[0061] In this embodiment, the blade root 2 is used to mount the aluminum alloy fan outlet guide vane to the housing or other components of the engine to ensure that the aluminum alloy fan outlet guide vane can be firmly fixed when rotating at high speed. The design of the blade tip 4 helps to optimize the flow of airflow, reduce turbulence and resistance, and improve the efficiency of the engine. The first boss 3 and the second boss 5 are symmetrically arranged, which not only enhances the structural stability of the aluminum alloy fan outlet guide vane, but also can effectively disperse the pressure generated by the airflow, prevent local overload, and extend the service life of the guide vane.

[0062] The design of the guide vane body, blade tip and blade root can optimize the flow path of the airflow, reduce turbulence and resistance, and improve the efficiency of the engine. Among them, the design of the blade tip is particularly important, which can effectively guide the airflow and ensure a smooth transition of the airflow. By optimizing the airflow characteristics, the combustion efficiency and thrust output of the engine can be improved, thereby improving the overall performance.

[0063] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for forging an aluminum alloy fan outlet guide vane, characterized in that: include: Performing top forging on the aluminum alloy bar to obtain top forgings; Performing pre-forging on the top forging to obtain a pre-forging; The pre-forged part is subjected to final forging to obtain a fan outlet guide vane.

2. The forging method according to claim 1, characterized in that: The method of performing top forging on the aluminum alloy bar to obtain a top forging comprises: heating the aluminum alloy bar at a first initial forging temperature; The aluminum alloy bar material after heating is placed in a preheated upsetting die for first upsetting, and after cooling to room temperature, an intermediate billet of upsetting part is obtained; The intermediate billet of the upsetting part is continuously heated at the first initial forging temperature, and the heated intermediate billet of the upsetting part is placed in a preheated upsetting die for a second upsetting, and after cooling to room temperature, an upsetting part is obtained.

3. The forging method according to claim 2, characterized in that: The preheating temperature of the top forging die is 150-200°C.

4. The forging method according to claim 1, characterized in that: The top forging is subjected to pre-forging to obtain a pre-forging, comprising: heating the top forging at a second initial forging temperature; The heated top forging is placed in a preheated preforging die for preforging, and after forging, it is cooled to room temperature to obtain a preforging.

5. The forging method according to claim 4, characterized in that: The pre-forged part is subjected to final forging to obtain a fan outlet guide vane, comprising: heating the pre-forging at a third initial forging temperature; The heated pre-forged piece is placed in a preheated final forging die for final forging, and after forging, it is cooled to room temperature to obtain a fan outlet guide vane.

6. The forging method according to claim 5, characterized in that: The preheating temperatures of the pre-forging die and the final forging die are both 300-350°C.

7. The forging method according to claim 5, characterized in that: After the fan outlet guide vanes are obtained, the fan outlet guide vanes need to be subjected to a solid solution treatment.

8. The forging method according to claim 7, characterized in that: It is also necessary to perform cold pressing treatment on the fan outlet guide vane after the solution treatment.

9. The forging method according to claim 8, characterized in that: It is also necessary to perform aging treatment on the fan outlet guide vanes after the cold pressing treatment.

10. An aluminum alloy fan outlet guide vane, characterized in that: The aluminum alloy fan outlet guide vane comprises: A guide vane body, wherein a blade root is integrally connected to one side of the guide vane body, and a blade tip is integrally connected to the other side of the guide vane body, the blade root is integrally connected to a first boss, and the blade tip is integrally connected to a second boss, and the first boss and the second boss are symmetrically arranged.

Images