CN117086248A - Coarse-grain elimination forging process for high-performance aluminum alloy component - Google Patents
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- CN117086248A CN117086248A CN202311065837.XA CN202311065837A CN117086248A CN 117086248 A CN117086248 A CN 117086248A CN 202311065837 A CN202311065837 A CN 202311065837A CN 117086248 A CN117086248 A CN 117086248A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 150
- 238000005242 forging Methods 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 80
- 230000008030 elimination Effects 0.000 title claims abstract description 13
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 13
- 238000011282 treatment Methods 0.000 claims abstract description 40
- 230000032683 aging Effects 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000010791 quenching Methods 0.000 claims abstract description 16
- 230000000171 quenching effect Effects 0.000 claims abstract description 16
- 238000009966 trimming Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000004321 preservation Methods 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims 1
- 239000006104 solid solution Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 abstract description 8
- 238000005728 strengthening Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 238000009864 tensile test Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 230000001376 precipitating effect Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001008 7075 aluminium alloy Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000010080 roll forging Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/78—Combined heat-treatments not provided for above
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The application discloses a high-performance aluminum alloy component coarse-grain elimination forging process which comprises the steps of preheating, blank making, forging, quenching, trimming and aging treatment. Compared with the prior art, the technical scheme provided by the application has the beneficial effects that: compared with the traditional aluminum alloy forging process, the solid solution process is combined with the blank preheating process into one process in advance, blanks are manufactured in a hot working mode, and after hot die forging, the forging structure is preserved by quick water cooling, so that the common coarse grain problem in the aluminum alloy member forging process is solved, meanwhile, the solid solution heat treatment process after forging is omitted, the use of a solid solution furnace is saved, the production efficiency is improved, the purpose of optimizing the energy consumption is achieved, meanwhile, the forging structure is preserved by quick water cooling after hot die forging, the solute is prevented from being precipitated in advance, and the later aging strengthening effect is facilitated.
Description
Technical Field
The application relates to the technical field of forging forming of aluminum alloy components, in particular to a high-performance rough crystal eliminating forging process of an aluminum alloy component.
Background
With the vigorous development of manufacturing industry and continuous progress of technology, new technology and new materials are continuously emerging. Along with the application of the light-weight technology, the method conforms to the necessary trend of energy conservation and emission reduction of automobiles, and the application of light metals such as aluminum and alloys thereof in the forging industry is also wider. Compared with castings and other workpieces, a better microstructure can be obtained, so that more uniform and reliable mechanical properties are obtained, and in addition, the forging is higher in strength, better in safety and stronger in plasticity. As a result, there is an increasing demand for aluminum alloy forgings, especially for safety critical lightweight structures. Various mechanical parts which bear medium strength and limited movement are widely used as aluminum alloy, so that the weight of the parts is reduced, and the bearing capacity is improved. The automobile parts, especially the security parts, require that the forging has high strength, good plasticity and uniform structure, and the whole forging has no coarse grain, so that the forging can be qualified.
As shown in fig. 1, fig. 1 is a general plan layout diagram of a conventional high-performance aluminum alloy member forging production line, which includes 8 procedures of preheating, blank making, forging, trimming, water feeding, solution treatment, quenching, artificial aging and the like, wherein three procedures of long-time heating are provided, and the functions of the three procedures of long-time heating are as follows: heating and preserving heat before forging to ensure that the blank obtains good plasticity so as to perform forming better; after forging, carrying out solution heat treatment to enable all undissolved phases in the aluminum alloy to be completely dissolved into an aluminum matrix, and obtaining supersaturated solid solution after quenching; the aging heat treatment enables the aluminum alloy to precipitate a precipitated phase with a strengthening effect after solid solution, and the mechanical property of the forging piece is improved.
In the conventional forging production process of high-performance aluminum alloy components, the following problems exist:
1) The traditional high-performance aluminum alloy component forges, in particular to the aluminum alloy with the arm, which has relatively complex structure, the production process flow is long and has more steps, the temperature is unstable and uneven in the forging process of the forging piece, thereby causing abnormal growth of crystal grains, and simultaneously, the problems of long production period and high energy consumption are also existed;
2) After final forging, cutting edges of the forging piece and then quenching with water, so that the water temperature of the forging piece is too low, the forging piece is easy to enter a 6082 aluminum alloy quenching sensitive temperature range, solute is precipitated in advance, and the later aging strengthening effect is affected.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a process for removing coarse grains from a high-performance aluminum alloy member to solve the technical problems of the conventional high-performance aluminum alloy member, such as long process steps, unstable and uneven temperature during forging, abnormal growth of grains, high energy consumption and poor post-aging strengthening effect.
In order to achieve the above object, the present application provides a high-performance aluminum alloy member coarse grain elimination forging process, comprising the steps of:
s1, preheating: heating the aluminum alloy blank to a first preset temperature and then preserving heat for a period of time;
s2, blank making: sequentially performing blank making and deformation on the preheated aluminum alloy blank at a second preset temperature;
s3, forging: performing pre-forging and final-forging treatment on the deformed aluminum alloy blank at a third preset temperature to obtain an aluminum alloy forging piece with a preset shape;
s4, quenching: quenching the aluminum alloy forging piece in water;
s5, trimming: trimming the quenched aluminum alloy forging;
s6, aging treatment: and (3) carrying out aging treatment on the aluminum alloy forging piece subjected to the trimming treatment to obtain the aluminum alloy forging piece meeting specific technical requirements.
In some embodiments, in the step S1, the first preset temperature is 466-555 ℃.
In some embodiments, in the step S1, the heat preservation time of the aluminum alloy billet is determined by the diameter of the aluminum alloy billet, and the calculation formula is:
T＝K*D
wherein T is the holding time of the aluminum alloy billet, D is the diameter of the aluminum alloy billet, K is the conversion coefficient, and k=1.5 mm/min when the aluminum alloy billet is a 2xxx or 6xxx aluminum alloy; when the aluminum alloy billet is a 7xxx aluminum alloy, k=3 mm/min.
In some embodiments, in the step S2, the preheated aluminum alloy blank is formed into a blank at a temperature of 200-350 ℃ and then deformed at a temperature of 200-300 ℃.
In some embodiments, in the step S3, the aluminum alloy blank after being formed is subjected to pre-forging and final forging at a temperature of 180-300 ℃.
In some embodiments, in the step S4, when the aluminum alloy forging is quenched by water, the water temperature is controlled to be 10-30 ℃, and the quenching time is controlled to be 10-20S.
In some embodiments, in the step S6, the temperature at which the aluminum alloy forged piece after the trimming treatment is subjected to aging treatment is determined by the model of the aluminum alloy forged piece.
In some embodiments, the temperature at which the edge-cut aluminum alloy forging is aged is related to the model of the aluminum alloy forging as follows: when the aluminum alloy forging piece is a 7xxx aluminum alloy bar, the aging treatment temperature is 115-145 ℃ and the aging treatment time is 16-24 hours; when the aluminum alloy forging piece is a 6xxx aluminum alloy bar, the aging treatment temperature is 154-185 ℃ and the aging treatment time is 7-9 h; when the aluminum alloy forging is a 2xxx aluminum alloy bar, the aging treatment is carried out at 185-196 ℃ for 11-26 hours.
Compared with the prior art, the technical scheme provided by the application has the beneficial effects that:
(1) Compared with the traditional aluminum alloy forging process, the solid solution process is combined with the blank preheating process into one process, blanks are manufactured in a hot working mode, and after hot die forging, water is quickly fed for cooling so as to preserve forging structures, so that the common coarse-grain problem in the aluminum alloy member forging process is solved, meanwhile, the solid solution heat treatment process after forging is omitted, the use of a solid solution furnace is saved, the production efficiency is improved, and the aim of optimizing energy consumption is fulfilled;
(2) After hot die forging, the forging structure is preserved by fast water cooling, so that the solute is prevented from precipitating in advance, and the later aging strengthening effect is facilitated.
Drawings
FIG. 1 is a general plan layout view of a conventional high performance aluminum alloy component forging line;
FIG. 2 is a schematic flow chart of an embodiment of a high performance aluminum alloy component coarse grain temper forging process provided by the present application;
FIG. 3 is a flow chart comparing the high performance aluminum alloy member coarse grain temper forging process of FIG. 2 with a conventional aluminum alloy member forging process;
FIG. 4 is a coarse grain pictorial illustration of the finished component of the high performance aluminum alloy component coarse grain elimination forging process of FIG. 2 and a conventional aluminum alloy component forging process;
FIG. 5 is a tensile specimen of the high performance aluminum alloy component of FIG. 2 forged by the coarse grain temper forging process.
Detailed Description
The following detailed description of preferred embodiments of the application is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the application, are used to explain the principles of the application and are not intended to limit the scope of the application.
Referring to fig. 2 and 3, the application provides a high-performance aluminum alloy member coarse-grain eliminating forging process, which comprises the following steps:
s1, preheating: heating the aluminum alloy blank to a first preset temperature and then preserving heat for a period of time;
in the step S1, the heat preservation temperature of the aluminum alloy blank is 466-555 ℃.
S2, blank making: sequentially performing blank making and deformation on the preheated aluminum alloy blank at a second preset temperature;
in the step S1, the heat preservation time of the aluminum alloy blank is determined by the diameter of the aluminum alloy blank, and the calculation formula is as follows:
T＝K*D
wherein T is the holding time of the aluminum alloy billet, D is the diameter of the aluminum alloy billet, K is the conversion coefficient, and k=1.5 mm/min when the aluminum alloy billet is a 2xxx or 6xxx aluminum alloy; when the aluminum alloy billet is a 7xxx aluminum alloy, k=3 mm/min.
In the step S2, the preheated aluminum alloy blank is manufactured at the temperature of 200-350 ℃ and then deformed at the temperature of 200-300 ℃.
S3, forging: performing pre-forging and final-forging treatment on the deformed aluminum alloy blank at a third preset temperature to obtain an aluminum alloy forging piece with a preset shape;
in the step S3, the aluminum alloy blank after blank making is subjected to pre-forging and final forging treatment at the temperature of 180-300 ℃.
S4, quenching: quenching the aluminum alloy forging piece in water;
in the step S4, when the aluminum alloy forging piece is quenched in water, the water temperature is controlled to be 10-30 ℃, and the quenching time is controlled to be 10-20S.
S5, trimming: trimming the quenched aluminum alloy forging;
s6, aging treatment: and (3) carrying out aging treatment on the aluminum alloy forging piece subjected to the trimming treatment to obtain the aluminum alloy forging piece meeting specific technical requirements.
In the step S6, the temperature of ageing treatment of the aluminum alloy forging piece subjected to edge cutting treatment is determined by the model of the aluminum alloy forging piece, and when the aluminum alloy forging piece is a 7xxx aluminum alloy bar, the temperature of ageing treatment is 115-145 ℃ and the time is 16-24 hours; when the aluminum alloy forging piece is a 6xxx aluminum alloy bar, the aging treatment temperature is 154-185 ℃ and the aging treatment time is 7-9 h; when the aluminum alloy forging is a 2xxx aluminum alloy bar, the aging treatment is carried out at 185-196 ℃ for 11-26 hours.
The technical scheme of the high-performance aluminum alloy member coarse-grain elimination forging process provided by the application has the beneficial effects that:
(1) Compared with the traditional aluminum alloy forging process, the solid solution process is combined with the blank preheating process into one process, blanks are manufactured in a hot working mode, and after hot die forging, water is quickly fed for cooling so as to preserve forging structures, so that the problem of coarse crystals common in the forging process of aluminum alloy components (as shown in fig. 4 and 5) is solved, meanwhile, the solid solution heat treatment process after forging is omitted, the use of a solid solution furnace is saved, the production efficiency is improved, and the aim of optimizing energy consumption is fulfilled;
(2) After hot die forging, the forging structure is preserved by fast water cooling, so that the solute is prevented from precipitating in advance, and the later aging strengthening effect is facilitated.
The high-performance aluminum alloy member coarse grain elimination forging process provided by the application is described in detail below with reference to specific examples.
Example 1
The coarse-grain eliminating forging process of the high-performance aluminum alloy member comprises the following steps of:
s1, preheating: heating and preserving the blank to 466-499 ℃ and then preserving the heat for a period of time T=1.5 heating the diameter D,
s2, blank making: putting the blank into a roll forging device with the die temperature heated to 300 ℃ for blank making and deformation, and then putting the blank into a press bending flattening device with the die temperature of 200 ℃ for pre-forging deformation;
s3, forging: directly placing the workpiece after blank making on a forging die with the temperature of 200 ℃ for pre-forging and final-forging treatment to obtain the geometric shape meeting the product requirement;
s4, quenching: adding water into the forging piece, wherein the water is circulating water, the water temperature is controlled to be about 25 ℃, and the quenching time is controlled to be 15s;
s5, trimming: trimming the quenched aluminum alloy forging;
s6, aging treatment: carrying out ageing heat treatment, wherein the ageing temperature is 180 ℃ and the ageing time is 8 hours, so that a forging meeting the technical requirements is obtained;
tensile samples are cut on the forged part, the mechanical properties of the forged part after forming are tested by unidirectional tensile test, the tensile strength of the forged part can reach 568MPa, the yield strength of the forged part can reach 503MPa (shown in table 1), and the tensile strength and the yield strength of the T6-state alloy manufactured by the traditional process are 545MPa and 471MPa respectively, so that the tensile strength and the yield strength of the aluminum alloy member obtained in the embodiment 1 are greatly improved compared with those of the aluminum alloy member obtained by the traditional process.
Table 1: mechanical properties of forgings of different embodiments
Example 2
The specific method of the 7075 aluminum alloy automobile steering knuckle is the same as that of the example 1, and the different process conditions are as follows: and (5) returning to the furnace for heat preservation for 1-2min after the blank is deformed.
Tensile samples are cut on the processed part, the mechanical properties of the part are tested by unidirectional tensile test, the tensile strength of the part can reach 548MPa, the yield strength of the part can reach 497MPa (shown in table 1), and the tensile strength and the yield strength of the T6-state alloy prepared by the traditional process are 545MPa and 471MPa respectively, so that the tensile strength and the yield strength of the aluminum alloy component obtained in the embodiment 2 are greatly improved compared with those of the aluminum alloy component obtained by the traditional process.
Example 3
The specific method of the 6082 aluminum alloy automobile steering knuckle is the same as that of the example 1, and the different process conditions are as follows: and (5) carrying out furnace returning and heat preservation for 1-2min after forging deformation.
Tensile test is cut on the formed part, the mechanical property after forming is tested by unidirectional tensile test, a plurality of tensile test samples are averaged, the tensile strength can reach 394MPa, the yield strength can reach 353MPa (shown in table 1), and the tensile strength and the yield strength of the T6-state alloy prepared by the traditional process are 379MPa and 337MPa respectively, so that the tensile strength and the yield strength of the aluminum alloy component obtained in the embodiment 1 are greatly improved compared with those of the aluminum alloy component obtained by the traditional process.
Example 4
A high-performance aluminum alloy component coarse-grain elimination forging process is characterized in that for 6082 complex parts which are required to be subjected to multiple die forging and can be formed, the specific method is the same as that of the embodiment 3, and different process conditions are as follows: the die forging is carried out for a plurality of times during the forming, and the temperature of the workpiece is kept by a temperature control device during the transfer of the workpiece between the dies during the die forging for a plurality of times.
Tensile samples are cut on the processed part, the mechanical properties of the part are tested by unidirectional tensile test, the tensile strength of the part can reach 385MPa, the yield strength of the part can reach 346MPa (shown in table 1), and the tensile strength and the yield strength of the T6-state alloy prepared by the traditional process are 379MPa and 337MPa respectively, so that the tensile strength and the yield strength of the aluminum alloy member obtained in the embodiment 1 are greatly improved compared with those of the aluminum alloy member obtained by the traditional process.
Example 5
A process for removing coarse crystals from a high-performance aluminum alloy component comprises the following steps of: the pre-strengthening temperature is 480 ℃, and the heat preservation time is 4 hours; the solid solution heat preservation temperature is 460-550 ℃, the heat preservation is carried out for 60 minutes, the pre-aging temperature is 75 ℃, and the heat preservation is carried out for 12 hours.
Tensile samples are cut on the processed part, the mechanical properties of the part are tested by unidirectional tensile test, the tensile strength of the part can reach 478MPa, the yield strength of the part can reach 357MPa (shown in table 1), and the tensile strength and the yield strength of the T6-state alloy prepared by the traditional process are 441MPa and 346MPa respectively, so that the tensile strength and the yield strength of the aluminum alloy member obtained in the embodiment 1 are greatly improved compared with those of the aluminum alloy member obtained by the traditional process.
Example 6
A high-performance aluminum alloy component coarse-grain elimination forging process is characterized in that for 2024 complex parts which can be obtained by carrying out multiple die forging, the specific method is the same as that in the fifth embodiment, and different process conditions are as follows: the forging is performed for a plurality of times, and the heat preservation treatment is performed on the workpiece by using a temperature control device during the transfer of the workpiece between the dies in the plurality of times of forging.
Tensile samples are cut on the processed part, the mechanical properties of the part are tested by unidirectional tensile test, the tensile strength of the part can reach 446MPa, the yield strength of the part can reach 352MPa (shown in table 1), and the tensile strength and the yield strength of the T6-state alloy prepared by the traditional process are 441MPa and 346MPa respectively, so that the tensile strength and the yield strength of the aluminum alloy component obtained in the embodiment 1 are greatly improved compared with those of the aluminum alloy component obtained by the traditional process.
In summary, the technical scheme of the high-performance aluminum alloy member coarse-grain elimination forging process provided by the application has the beneficial effects that:
(1) Compared with the traditional aluminum alloy forging process, the solid solution process is combined with the blank preheating process into one process, blanks are manufactured in a hot working mode, and after hot die forging, water is quickly fed for cooling so as to preserve forging structures, so that the problem of coarse crystals common in the forging process of aluminum alloy components (as shown in fig. 4 and 5) is solved, meanwhile, the solid solution heat treatment process after forging is omitted, the use of a solid solution furnace is saved, the production efficiency is improved, and the aim of optimizing energy consumption is fulfilled;
(2) After hot die forging, the forging structure is preserved by fast water cooling, so that the solute is prevented from precipitating in advance, and the later aging strengthening effect is facilitated.
The foregoing is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be included in the scope of the present application.
Claims (10)
1. The coarse-grain elimination forging process for the high-performance aluminum alloy component is characterized by comprising the following steps of:
s1, preheating: heating the aluminum alloy blank to a first preset temperature and then preserving heat for a period of time;
s2, blank making: sequentially performing blank making and deformation on the preheated aluminum alloy blank at a second preset temperature;
s3, forging: performing pre-forging and final-forging treatment on the deformed aluminum alloy blank at a third preset temperature to obtain an aluminum alloy forging piece with a preset shape;
s4, quenching: quenching the aluminum alloy forging piece in water;
s5, trimming: trimming the quenched aluminum alloy forging;
s6, aging treatment: and (3) carrying out aging treatment on the aluminum alloy forging piece subjected to the trimming treatment to obtain the aluminum alloy forging piece meeting specific technical requirements.
2. The high performance aluminum alloy component coarse grain temper forging process of claim 1, wherein in step S1, the first predetermined temperature is 466-555 ℃.
3. The process for removing coarse crystals from a high-performance aluminum alloy member according to claim 1, wherein in the step S1, the holding time of the aluminum alloy billet is determined by the diameter of the aluminum alloy billet, and the calculation formula is as follows:
T＝K*D
wherein T is the heat preservation time of the aluminum alloy blank, D is the diameter of the aluminum alloy blank, and K is the conversion coefficient.
4. The high performance aluminum alloy component coarse grain temper forging process of claim 3, wherein K = 1.5mm/min when the aluminum alloy blank is a 2xxx or 6xxx aluminum alloy, and K = 3mm/min when the aluminum alloy blank is a 7xxx aluminum alloy.
5. The high-performance aluminum alloy member coarse-grain temper forging process according to claim 1, wherein in the step S2, the preheated aluminum alloy blank is formed into a blank at a temperature of 200 to 350 ℃ and deformed at a temperature of 200 to 300 ℃.
6. The high-performance aluminum alloy member coarse grain temper forging process according to claim 1, wherein in the step S3, the aluminum alloy blank after being formed is subjected to pre-forging and finish forging treatments at a temperature of 180 to 300 ℃.
7. The process for removing coarse crystals from a high-performance aluminum alloy member according to claim 1, wherein in the step S4, the water temperature is controlled to be 10-30 ℃ when the aluminum alloy forging is quenched in water.
8. The high-performance aluminum alloy component coarse grain elimination forging process according to claim 1, wherein in the step S4, the quenching time is controlled to be 10-20S.
9. The high-performance aluminum alloy member rough crystal temper rolling forging process according to claim 1, wherein in the step S6, the temperature at which the aluminum alloy forging after the trimming treatment is aged is determined by the type of the aluminum alloy forging.
10. The high-performance aluminum alloy member coarse-grain elimination forging process according to claim 1, wherein the relationship between the temperature at which the aluminum alloy forging subjected to the trimming treatment is subjected to the aging treatment and the model of the aluminum alloy forging is:
when the aluminum alloy forging piece is a 7xxx aluminum alloy bar, the aging treatment temperature is 115-145 ℃ and the aging treatment time is 16-24 hours; when the aluminum alloy forging piece is a 6xxx aluminum alloy bar, the aging treatment temperature is 154-185 ℃ and the aging treatment time is 7-9 h; when the aluminum alloy forging is a 2xxx aluminum alloy bar, the aging treatment is carried out at 185-196 ℃ for 11-26 hours.
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