Uniform forming method of ultrahigh-strength aluminum alloy annular forge piece

Abstract

The invention relates to a uniform forming method of an ultrahigh-strength aluminum alloy annular forge piece, in particular to a uniform forming method of an ultrahigh-strength aluminum alloy annular forge piece. The problems that an existing aluminum alloy annular forge piece is low in structure property uniformity and cannot meet the development requirement of the aerospace industry are solved. According to the method, the three-time upsetting and drawing forming technology is adopted, the ingot casting heating temperature and the upsetting and drawing starting temperature before each time of upsetting and drawing are controlled, heating is selected to be conducted to 400-430 DEG C in the first pass, natural cooling is conducted to 380-400 DEG C, the temperature difference between the core surface of the blank and the core surface of the blank is small, low-temperature cogging is achieved, the temperature and the temperature difference between the core surface of the blank are increased through two times of forging, and the yield is increased. And full crushing of homogenized non-redissolution primary phases brought by high alloying is achieved, and meanwhile the structure uniformity of the forge piece in all directions is improved. And the multi-stage solid solution treatment and the multi-stage aging treatment are combined, so that the strength of the annular forge piece in all directions meets the requirements. The method is applied to uniform forming of the ultrahigh-strength aluminum alloy annular forgings.

Description

Technical Field

[0001] The invention specifically relates to a uniform forming method for an ultra-high strength aluminum alloy ring forging. Background Art

[0002] In the field of aerospace, aircraft models and equipment are always in the process of rapid iterative development. The latest generation of aerospace aircraft has raised the performance standards to a new level. Its structural parts must not only withstand extremely complex and harsh mechanical environments, including but not limited to aerodynamic loads during high-speed flight, frequent alternating hot and cold shocks, but also need to cope with special working conditions such as long-term space radiation. In this context, the requirements for the strength and uniformity of structural parts are far greater than before. Although the existing alloy materials that have been relied on in the past have played a key role in the early development of aircraft, with the rapid advancement of technology, their comprehensive performance shortcomings have become increasingly prominent, and it is difficult to adapt to the high standards of current aircraft equipment. Especially in the field of forging ring products, aerospace engineering now sets extremely demanding indicators: requiring the L-direction, LT-direction and S-direction performance to reach tensile strength ≥600MPa, yield strength ≥560MPa, and elongation ≥6%. The improvement of this standard means that traditional casting processes and heat treatment methods have been exhausted. The casting process is limited by the solute segregation during the solidification process, and it is impossible to accurately control the distribution of alloy elements, resulting in inherent lack of organizational uniformity; although conventional heat treatment can fine-tune the performance, it is difficult to fundamentally break through the performance ceiling of existing alloys, and it is difficult to achieve a synergistic improvement of ultra-high strength and high uniformity. In order to overcome this bottleneck, the highly alloyed 7xxx series alloys have entered the research and development field. In theory, increasing the degree of alloying can promote the generation of more strengthening phases, thereby unlocking the potential of ultra-high strength of forgings. However, the high alloying strategy is difficult to implement in practice. On the one hand, the high alloy content causes the viscosity of the alloy melt to increase dramatically, the fluidity to deteriorate, and the risk of casting defects to increase; on the other hand, the problem of processing deformation follows one after another. The 7000 series alloy itself is famous for its high strength characteristics, but this advantage has become a "stumbling block" in the forging process. The high work hardening rate brought by high strength makes it very easy to crack during forging. What's more tricky is that to create high-quality ring forgings that meet aerospace requirements, it is far from enough to achieve a single crack-free forging, and it is also necessary to ensure that the forging process can withstand multiple large deformations. Each forging deformation reshapes the material's microstructure. Only after multiple reasonable large deformation forgings can we eliminate residual stress, refine grains, and achieve uniform regulation of organizational properties. However, in the context of highly alloyed 7xxx series alloys, it is undoubtedly a very challenging and arduous task to take into account both forging and organizational uniformity control. Therefore, it is urgent to develop a new uniform forming method for ultra-high-strength aluminum alloy ring forgings, aiming to solve the dilemma of low uniformity of organizational properties of existing aluminum alloy ring forgings, so as to meet the urgent needs of the rapid development of the aerospace industry. Summary of the invention

[0003] The present invention aims to solve the problem that the existing aluminum alloy ring forgings have low uniformity of organizational properties and cannot meet the development needs of the aerospace industry, and to provide a uniform forming method for ultra-high strength aluminum alloy ring forgings.

[0004] A uniform forming method for an ultra-high strength aluminum alloy ring forging is completed by the following steps:

[0005] 1. According to the mass percentage of Cu: 1.2% to 2.4%, Mg: 2.2% to 3.0%, Zn: 9.0% to 10.0%, Zr: 0.12% to 0.18%, Cr: 0.02% to 0.04%, Ti: 0.002% to 0.04% and the balance of Al, aluminum ingots, cathode copper, primary magnesium ingots, zinc ingots, aluminum-zirconium alloy ingots, aluminum-chromium master alloy ingots and aluminum-titanium wires are weighed as smelting raw materials for industrial casting of ingots to obtain annealed round ingots;

[0006] 2. Put the annealed round ingot into a resistance heating furnace, heat it to 400-430°C, and keep it warm for 8-16 hours to obtain a blank to be forged;

[0007] 3. After the primary forging blank is taken out of the furnace, it is naturally cooled in air to a surface temperature of 380-420°C, and then the blank is forged using a forging press to obtain a primary forging blank;

[0008] 4. Heat the primary forging billet again to 410-440°C and keep it warm for 8-16 hours to obtain the secondary forging billet;

[0009] 5. After the secondary forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 380-420°C, and then the secondary forging blank is forged using a forging press to obtain a secondary forging blank;

[0010] 6. Heat the secondary forging billet again to 420-450°C and keep it warm for 8-16 hours to obtain the third forging billet;

[0011] 7. After the three-time forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 380-420°C, and then the blank is forged and punched using a forging press to obtain a ring forging rough material;

[0012] 8. Heat the ring forging raw material to 400-430°C and keep it warm for 8-16 hours to obtain the ring forging blank;

[0013] 9. After the ring forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 380-400°C, and then the ring forging blank is ring-rolled to a target size using a ring rolling mill to obtain a ring forging with ultra-high alloying and isotropic structural uniformity.

[0014] Beneficial effects of the present invention:

[0015] The present invention realizes the ultra-high strength and high uniformity control of the ring forgings through alloy composition design and forging process creation. The ring forgings manufactured by the present invention are tested according to GB / T 228. L direction: tensile strength 608MPa-632MPa, yield strength 575MPa-589MPa, elongation 10.3%-13.4%; LT direction: tensile strength 602MPa-617MPa, yield strength 568MPa-576MPa, elongation 9.5%-11.9%; S direction: tensile strength 605MPa-616MPa, yield strength 572MPa-584MPa, elongation 8.9%-12.2%. According to GB / T 4161, the fracture toughness of the ring forging is 25.78MPa·m 1 / 2 ~31.73MPa·m 1 / 2 According to GB / T 12966-2008 test conductivity is 36.73%IACS~37.52%IACS, according to HB5455 test exfoliation corrosion EB level. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the forging process of primary billet forging and secondary billet forging;

[0017] Figure 2 Schematic diagram of the process of step seven;

[0018] Figure 3 This is a low magnification metallographic photograph of a round ingot as cast;

[0019] Figure 4 This is a high magnification metallographic photograph of the round ingot as cast;

[0020] Figure 5 This is a high-magnification SEM photograph of the round ingot after homogenization annealing in Example 2;

[0021] Figure 6 This is the metallographic structure diagram of the raw material of the forging after 3 upsetting and 3 drawing;

[0022] Figure 7 This is the metallographic structure diagram of the raw material of the forging after 6 upsetting and 6 drawing;

[0023] Figure 8 Metallographic structure diagram of the rough material of the forging after 9 upsetting and 9 drawing. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is not limited to the specific implementation modes listed below, but also includes any combination of the specific implementation modes.

[0025] Specific implementation method 1: In this implementation method, a uniform forming method of an ultra-high strength aluminum alloy ring forging is completed according to the following steps:

[0026] 1. According to the mass percentage of Cu: 1.2% to 2.4%, Mg: 2.2% to 3.0%, Zn: 9.0% to 10.0%, Zr: 0.12% to 0.18%, Cr: 0.02% to 0.04%, Ti: 0.002% to 0.04% and the balance of Al, aluminum ingots, cathode copper, primary magnesium ingots, zinc ingots, aluminum-zirconium alloy ingots, aluminum-chromium master alloy ingots and aluminum-titanium wires are weighed as smelting raw materials for industrial casting of ingots to obtain annealed round ingots;

[0027] 2. Put the annealed round ingot into a resistance heating furnace, heat it to 400-430°C, and keep it warm for 8-16 hours to obtain a blank to be forged;

[0028] 3. After the primary forging blank is taken out of the furnace, it is naturally cooled in air to a surface temperature of 380-420°C, and then the blank is forged using a forging press to obtain a primary forging blank;

[0029] 4. Heat the primary forging billet again to 410-440°C and keep it warm for 8-16 hours to obtain the secondary forging billet;

[0030] 5. After the secondary forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 380-420°C, and then the secondary forging blank is forged using a forging press to obtain a secondary forging blank;

[0031] 6. Heat the secondary forging billet again to 420-450°C and keep it warm for 8-16 hours to obtain the third forging billet;

[0032] 7. After the three-time forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 380-420°C, and then the blank is forged and punched using a forging press to obtain a ring forging rough material;

[0033] 8. Heat the ring forging raw material to 400-430°C and keep it warm for 8-16 hours to obtain the ring forging blank;

[0034] 9. After the ring forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 380-400°C, and then the ring forging blank is ring-rolled to a target size using a ring rolling mill to obtain a ring forging with ultra-high alloying and isotropic structural uniformity.

[0035] This embodiment adopts three-time upsetting forming technology, and controls the ingot heating temperature and the starting upsetting temperature before each upsetting. The first time is heated to 400℃~430℃, and naturally cooled to 380℃~400℃. The temperature difference between the core and the surface of the billet is small, and the billet is opened at a relatively low temperature. The temperature and the temperature difference between the core and the surface of the billet are increased in the next two forgings, so that high alloying brings about the full crushing of the homogenized undissolved primary phase, and at the same time improves the uniformity of the structure in all directions of the forging. Combined with multi-stage solid solution and multi-stage aging treatment, the strength of the ring forging in all directions meets the requirements. L direction: tensile strength 608MPa~632MPa, yield strength 575MPa~589MPa, elongation 10.3%~13.4%; LT direction: tensile strength 602MPa~617MPa, yield strength 568MPa~576MPa, elongation 9.5%~11.9%; S direction: tensile strength 605MPa~616MPa, yield strength 572MPa~584MPa, elongation 8.9%~12.2%. The maximum difference in tensile strength in each direction of the present invention is 30MPa, and the maximum difference in yield strength is 21MPa. Compared with the conventional method for producing forging products, the maximum difference in tensile strength in each direction is 50MPa, and the maximum difference in strength is 63MPa. The performance uniformity of forged ring products is significantly improved, which can meet the needs of my country's new generation of ZLDD to improve engine specific impulse and reduce engine quality, and provide advanced material technology reserves for my country's future advanced model equipment design and material selection and existing model improvement and modification.

[0036] In the raw material smelting stage, this embodiment strictly mixes Cu, Mg, Zn, Zr, Cr, Ti and Al according to specific mass percentages. These alloy elements play their respective roles. For example, Cu, Mg and Zn are common strengthening elements in high-strength aluminum alloys, which can form various strengthening phases to improve the matrix strength; Zr can refine the grains, inhibit recrystallization and improve the uniformity of the alloy structure; Cr and Ti also help to refine the grains and reduce the segregation of the structure, laying a good composition foundation for subsequent uniform forming and high strength.

[0037] This embodiment heats the blank to different suitable temperature ranges multiple times and keeps the temperature constant. The appropriate heating temperature can ensure that the alloy elements are fully dissolved, allowing the strengthening phase to be evenly distributed in the aluminum matrix to avoid local enrichment or segregation. Long-term heat preservation provides sufficient time for the alloy elements to diffuse, further promoting the homogenization of the organization and improving the overall performance consistency.

[0038] Before each forging in this embodiment, the billet is first cooled naturally in the air to a specific surface temperature range after it is taken out of the furnace, which not only avoids the billet temperature being too high, resulting in too fast deformation and uneven structure during forging, but also prevents the temperature from being too low, resulting in too large forging resistance and difficulty in forming. The forging process uses mechanical pressure to cause the metal to undergo plastic deformation, break up the coarse grains and segregation phases in the cast structure, refine the grains, promote uniform structure, and gradually accumulate to achieve high strength.

[0039] Repeated heating and temperature control are also performed before subsequent processes such as punching and ring rolling to continuously optimize the structure. Finally, the size is precisely controlled through ring rolling, so that the ring forgings can obtain ultra-high alloying and isotropic structural uniformity, thereby achieving the goals of ultra-high strength and high uniformity.

[0040] Specific embodiment 2: This embodiment is different from specific embodiment 1 in that: in step 1, the mass percentages are Cu: 2.0%, Mg: 2.5%, Zn: 9.7%, Zr: 0.12%, Cr: 0.03%, Ti: 0.025% and the balance is Al. The rest is the same as specific embodiment 1.

[0041] Specific embodiment 3: This embodiment is different from specific embodiment 1 in that: in step 1, the mass percentages are Cu: 2.1%, Mg: 2.5%, Zn: 9.5%, Zr: 0.12%, Cr: 0.03%, Ti: 0.03% and the balance is Al. The rest is the same as specific embodiment 1.

[0042] Specific embodiment 4: This embodiment is different from specific embodiment 1 in that: in step 1, the mass percentages of Cu: 2.2%, Mg: 2.4%, Zn: 9.7%, Zr: 0.13%, Cr: 0.025%, Ti: 0.023% and the balance is Al. The rest is the same as specific embodiment 1.

[0043] Specific embodiment 5: This embodiment is different from specific embodiment 1 in that the process of forging the blank in step 3 is: forging the material with a diameter-to-height ratio of 0.38 to 0.55, repeating longitudinal compression three times, circumferential deformation and elongation, and finally longitudinal compression to a pancake shape. Others are the same as specific embodiment 1.

[0044] Specific implementation example 6: This implementation example is different from specific implementation example 1 in that the process of secondary billet forging in step 5 is: forging material with a diameter-to-height ratio of 0.38 to 0.55, repeating longitudinal compression three times, circumferential deformation and elongation, and finally longitudinal compression to a pancake shape. Other aspects are the same as specific implementation example 1.

[0045] Specific embodiment 7: This embodiment is different from specific embodiment 1 in that the process of three-time billet forging in step 7 is: forging materials with a diameter-to-height ratio of 0.38-0.55, repeating longitudinal compression three times, circumferential deformation and elongation, and finally longitudinal compression to a pancake shape. Others are the same as specific embodiment 1.

[0046] Specific implementation example 8: This implementation example is different from the specific implementation example 1 in that the punching position in step 7 is the center position of the annular forging rough material. The rest is the same as the specific implementation example 1.

[0047] Specific implementation method 9: This implementation method is different from the specific implementation method 1 in that the linear speed range of the ring rolling in step 9 is 200-400 mm / s. The rest is the same as the specific implementation method 1.

[0048] Specific embodiment 10: This embodiment differs from specific embodiment 1 in that the linear speed range of the ring rolling in step 9 is 300 mm / s. The rest is the same as specific embodiment 1.

[0049] The following examples are used to verify the beneficial effects of the present invention:

[0050] Embodiment 1: A uniform forming method of an ultra-high strength aluminum alloy ring forging in this embodiment is carried out according to the following steps:

[0051] Industrial casting ingots are used, and the mass percentage of elements is Cu: 2.2%, Mg: 2.4%, Zn: 9.7%, Zr: 0.13%, Cr: 0.025%, Ti: 0.023% and the balance is Al;

[0052] 1. Place the annealed round ingot into a resistance heating furnace, heat it to 400°C to 421°C, and keep it warm for 10 hours to obtain a heated forging blank;

[0053] 2. After the forging blank is taken out of the furnace, it is naturally cooled to a surface temperature of 385℃~390℃ by air. Figure 1 Forging of billets with a diameter-to-height ratio of 0.45;

[0054] 3. The forging blank after the first forging is heated again to 410°C to 425°C and kept warm for 16 hours to obtain a heated forging blank;

[0055] 4. After the forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 380℃~396℃, and then the forging press is used according to Figure 1 Forging of billets with a diameter-to-height ratio of 0.45;

[0056] 5. The forging blank after the first forging is heated again to 420°C to 436°C and kept at this temperature for 12 hours to obtain a heated forging blank;

[0057] 6. After the forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 391℃~397℃, and then the forging press is used according to Figure 2 Perform billet forging and punching;

[0058] 7. Heat the ring forging blank to 420°C and keep it warm for 16 hours to obtain a heated forging blank;

[0059] 8. After the ring forging raw material is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 381℃~393℃, and then the raw material is ring-rolled to the target size using a ring rolling machine. The ring rolling line speed range is 300mm / s. The ring forging with ultra-high alloying isotropic microstructure uniformity is obtained.

[0060] This embodiment produces ultra-strong, high-uniformity, corrosion-resistant aluminum alloy ring forgings through alloy composition optimization, ingot quality control, uniform forging molding technology, and strengthening and toughening heat treatment technology. The ring forgings manufactured in this embodiment, according to the GB / T228 test, L direction: tensile strength 615MPa~632MPa, yield strength 579MPa~588MPa, elongation 10.3%~12.4%; LT direction: tensile strength 602MPa~617MPa, yield strength 568MPa~575MPa, elongation 10.5%~11.3%; S direction: tensile strength 605MPa~614MPa, yield strength 572MPa~583MPa, elongation 8.9%~11.7%. According to GB / T 4161, the fracture toughness of the ring forging is 25.85MPa·m1 / 2~31.43MPa·m1 / 2. According to GB / T12966-2008, the electrical conductivity is 36.73%IACS~37.52%IACS. According to HB 5455, the exfoliation corrosion is EB grade.

[0061] Example 2: A method for uniformly forming an ultra-high strength aluminum alloy forging ring is carried out according to the following steps:

[0062] Industrial casting ingots are used, and the mass percentage of the elements is Cu: 2.1%, Mg: 2.5%, Zn: 9.5%, Zr: 0.12%, Cr: 0.03%, Ti: 0.03% and the balance is Al.

[0063] 1. Place the annealed round ingot into a resistance heating furnace, heat it to 412°C to 430°C, and keep it warm for 16 hours to obtain a heated forging blank;

[0064] 2. After the forging blank is taken out of the furnace, it is naturally cooled in air to a surface temperature of 380℃~400℃. Figure 1 Forging of billets with a diameter-to-height ratio of 0.50;

[0065] 3. The forging blank after the first forging is heated again to 410°C to 430°C and kept warm for 10 hours to obtain a heated forging blank;

[0066] 4. After the forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 383℃~395℃, and then the forging press is used according to Figure 1 Forging of billets with a diameter-to-height ratio of 0.45;

[0067] 5. The forging blank after the first forging is heated again to 420°C to 440°C and kept warm for 10 hours to obtain a heated forging blank;

[0068] 6. After the forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 387℃~387℃, and then the forging press is used according to Figure 2 Perform billet forging and punching;

[0069] 7. Heat the ring forging blank to 420°C and keep it warm for 10 hours to obtain a heated forging blank;

[0070] 8. After the ring forging raw material is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 383℃~392℃, and then the raw material is ring-rolled to the target size using a ring rolling machine. The ring rolling line speed range is 300mm / s. The ring forging with ultra-high alloying isotropic microstructure uniformity is obtained.

[0071] The ring forging manufactured in this embodiment is tested according to GB / T 228. L direction: tensile strength 608MPa~626MPa, yield strength 575MPa~589MPa, elongation 11.5%~13.4%; LT direction: tensile strength 606MPa~617MPa, yield strength 571MPa~576MPa, elongation 9.5%~11.9%; S direction: tensile strength 609MPa~616MPa, yield strength 575MPa~584MPa, elongation 9.3%~12.2%. The fracture toughness of the ring forging tested according to GB / T 4161 is 25.78MPa·m 1 / 2 ~31.73MPa·m 1 / 2 According to GB / T 12966-2008 test conductivity 36.85%IACS ~ 37.50%IACS, according to HB 5455 test exfoliation corrosion EB level.

[0072] The metallographic photograph of the aluminum alloy round ingot in this embodiment is as follows: Figure 3 and 4 As shown by Figure 3 and 4It can be seen that the cast structure of the alloy is a typical dendrite structure, and the coarse primary solidification precipitate phase is segregated at the grain boundary. After the first homogenization annealing treatment at 420℃~440℃ for 12h, the SEM photos after high temperature treatment at 470℃ for 60h are shown in Figure 2. Figure 5 As can be seen from the figure, there is still a small amount of lamellar eutectic structure after homogenization treatment, which requires strong deformation treatment to fully break it up and reduce its adverse effect on the performance of the ring forging.

[0073] The metallographic structure of the longitudinal surface of the aluminum alloy first (3 upsetting and 3 drawing) upsetting and drawing ring forging rough material was observed ( Figure 6 )

[0074] The metallographic structure of the longitudinal surface of the aluminum alloy ring forging blank after the second upsetting and drawing (6 upsetting and 6 drawing) was observed. Figure 7 )

[0075] The metallographic structure of the longitudinal surface of the aluminum alloy third upsetting ring forging rough material was observed ( Figure 8 )

[0076] The grains after one upsetting and drawing (9 upsetting and 9 drawing) are relatively coarse. Figure 6 After two and three upsetting processes, the grain size is obviously finer and the grain uniformity is significantly improved. Figure 7 and Figure 8 From the mechanical properties results, the uniformity of mechanical properties in all directions is improved, and the elongation is significantly improved, as shown in Table 1.

[0077] Table 1 Aged tensile properties of T76 steel with different forging processes

[0078]

[0079] From the mechanical properties of T76 aged state with different forging processes in Table 1, the gradient cooling multiple upsetting and drawing process of the present invention can significantly improve the uniformity of the microstructure and performance of the alloy forgings in three directions, and improve the elongation level of the forgings, especially the transverse and longitudinal elongation.

[0080] A uniform forming method for ultra-high strength aluminum alloy ring forgings. The present invention relates to a uniform forming method for ultra-high strength aluminum alloy ring forgings. The purpose of the present invention is to solve the problem that the existing aluminum alloy ring forgings have low strength, large differences in anisotropic properties, and cannot meet the requirements of aerospace use. The aluminum alloy ring forgings of the present invention are made of smelting raw materials of Cu, Mg, Zn, Zr, Cr, Ti and Al, and are manufactured through smelting, casting, homogenization annealing, hot forging, quenching, cold compression, and aging. The present invention produces a ring forging product with high strength, good uniformity, good toughness, and corrosion resistance by optimizing alloy composition and forging forming technology, combined with three-stage quenching and two-stage aging technology of strengthening and toughening heat treatment. The present invention is applied in the field of preparation of aluminum alloy ring forgings.

Claims

1. A uniform forming method for ultra-high strength aluminum alloy ring forgings, characterized in that The uniform forming method of the ultra-high strength aluminum alloy ring forging is completed in the following steps:

1. According to the mass percentage of Cu: 1.2% to 2.4%, Mg: 2.2% to 3.0%, Zn: 9.0% to 10.0%, Zr: 0.12% to 0.18%, Cr: 0.02% to 0.04%, Ti: 0.002% to 0.04% and the balance of Al, aluminum ingots, cathode copper, primary magnesium ingots, zinc ingots, aluminum-zirconium alloy ingots, aluminum-chromium master alloy ingots and aluminum-titanium wires are weighed as smelting raw materials for industrial casting of ingots to obtain annealed round ingots; 2. Put the annealed round ingot into a resistance heating furnace, heat it to 400-430°C, and keep it warm for 8-16 hours to obtain a blank to be forged; 3. After the primary forging blank is taken out of the furnace, it is naturally cooled in air to a surface temperature of 380-420°C, and then the blank is forged using a forging press to obtain a primary forging blank; 4. Heat the primary forging billet again to 410-440°C and keep it warm for 8-16 hours to obtain the secondary forging billet; 5. After the secondary forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 380-420°C, and then the secondary forging blank is forged using a forging press to obtain a secondary forging blank; 6. Heat the secondary forging billet again to 420-450°C and keep it warm for 8-16 hours to obtain the third forging billet; 7. After the three-time forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 380-420°C, and then the blank is forged and punched using a forging press to obtain a ring forging rough material; 8. Heat the ring forging raw material to 400-430°C and keep it warm for 8-16 hours to obtain the ring forging blank; 9. After the ring forging blank is taken out of the furnace, it is naturally cooled in the air to a surface temperature of 380-400°C, and then the ring forging blank is ring-rolled to a target size using a ring rolling mill to obtain a ring forging with ultra-high alloying and isotropic structural uniformity.

2. The uniform forming method of an ultra-high strength aluminum alloy ring forging according to claim 1, characterized in that In step 1, the proportions are as follows: Cu: 2.0%, Mg: 2.5%, Zn: 9.7%, Zr: 0.12%, Cr: 0.03%, Ti: 0.025% and the balance is Al.

3. The uniform forming method of an ultra-high strength aluminum alloy ring forging according to claim 1, characterized in that In step 1, the proportions are as follows: Cu: 2.1%, Mg: 2.5%, Zn: 9.5%, Zr: 0.12%, Cr: 0.03%, Ti: 0.03% and the balance is Al.

4. The uniform forming method of an ultra-high strength aluminum alloy ring forging according to claim 1, characterized in that In step 1, the proportions are as follows: Cu: 2.2%, Mg: 2.4%, Zn: 9.7%, Zr: 0.13%, Cr: 0.025%, Ti: 0.023% and the balance is Al.

5. The uniform forming method of an ultra-high strength aluminum alloy ring forging according to claim 1, characterized in that The process of forging the blank once in step three is: forging material with a diameter-to-height ratio of 0.38 to 0.55, repeatedly performing longitudinal compression three times, circumferential deformation and elongation, and finally longitudinal compression into a pancake shape.

6. The method for uniformly forming an ultra-high strength aluminum alloy ring forging according to claim 1, characterized in that The process of the secondary billet forging in step 5 is: according to the forging material with a diameter-to-height ratio of 0.38 to 0.55, it is repeatedly subjected to longitudinal compression three times, circumferential deformation and elongation, and finally longitudinal compression into a pancake shape.

7. The uniform forming method of an ultra-high strength aluminum alloy ring forging according to claim 1, characterized in that The process of three-time billet forging in step seven is: forging material with a diameter-to-height ratio of 0.38 to 0.55, repeating longitudinal compression three times, circumferential deformation and elongation, and finally longitudinal compression to a pancake shape.

8. The uniform forming method of an ultra-high strength aluminum alloy ring forging according to claim 1, characterized in that The punching position described in step seven is the center position of the ring forging blank.

9. The uniform forming method of an ultra-high strength aluminum alloy ring forging according to claim 1, characterized in that The linear speed range of the ring rolling in step nine is 200-400 mm / s.

10. The method for uniformly forming an ultra-high strength aluminum alloy ring forging according to claim 9, characterized in that The linear speed range of the ring rolling in step nine is 300 mm / s.

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