CN106480384B - A kind of milling method of ultrahigh-strength aluminum alloy sheet material - Google Patents
A kind of milling method of ultrahigh-strength aluminum alloy sheet material Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
- C22F1/057—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 of alloys with copper as the next major constituent
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Abstract
The present invention discloses a kind of milling method of ultrahigh-strength aluminum alloy sheet material, comprises the following steps：A, the 48h of homogenizing annealing 24 at 450 550 DEG C of the aluminum alloy holding poles after terminating will be refined；B, temperature at 360 ~ 440 DEG C, after internal and external temperature is uniform, carries out the hot rolling predeformation of single pass 2 ~ 5% after control annealing, it is 360 ~ 440 DEG C to continue to control temperature, then carry out heavy reduction rolling of the single pass not less than 60% to deform, obtain heavy slab, then carry out water cooling or air cooling；Heavy slab after cooling is carried out to 0.5 3h solution treatment at 450 550 DEG C, then water quenching C,；Heavy slab after water quenching is carried out to 6h Pre-aging treatment at 150 250 DEG C, be then air-cooled to room temperature D,；E, the cold-rolling deformation of single pass 40 ~ 60% heavy slab after room temperature will be air-cooled to is carried out, then carries out 120 ~ 200 DEG C of whole Ageing Treatment.Sheet material prepared by the milling method of the present invention, has superhigh intensity, while have compared with high damnification resistant and long service life.
Description
Technical field
The invention belongs to aluminum alloy materials technical field, specially a kind of milling method of ultrahigh-strength aluminum alloy sheet material.
Background technology
Aluminium alloy is because its density is small, specific strength and specific stiffness are high, elasticity is good, shock resistance is good, corrosion-resistant, resistance to
The features such as mill, the coloring of easy surface, good processing forming and high reclaiming, it is widely used in Aeronautics and Astronautics, vapour
The fields such as car, machine-building, ship, building, finishing, its intensity is typically between 480-500MPa.With science skill in recent years
The rapid development of art and industrial economy further improves aluminum alloy materials performance has turned into what current international Aluminum circle was paid close attention to jointly
Problem.The implementation of national big aircraft programs, is proposed to the mechanical property of high-strength and high ductility, antifatigue, heat-resist aluminium alloy
Higher requirement, therefore develop large scale, high-strength and high ductility Heat-resistant Aluminium Alloy Plate novel preparation method, prepare the heat-resisting of high-strength and high ductility
Aluminum alloy plate materials, asked with meeting that the needs of aviation is to high performance heat resistant aluminium alloy sheet turns into currently urgently to be resolved hurrily
Topic, it is contemporary scientific circle and the focus of engineering circles research.But while the intensity and toughness of aluminum alloy materials is improved, aluminium closes
The durability and damage tolerance of golden material can not be improved synchronously, or even be reduced.
The content of the invention
In view of the above-mentioned problems, the present invention provides a kind of milling method of ultrahigh-strength aluminum alloy sheet material, prepared by the technique
Aluminum alloy plate materials intensity while ensureing to improve the intensity and toughness of aluminum alloy materials, improves its damage tolerant in more than 600MPa
Wound property, extend its service life.
For achieving the above object, technical scheme is as follows：
The milling method of described ultrahigh-strength aluminum alloy sheet material, comprises the following steps：
A, the homogenizing annealing 24-48h at 450-550 DEG C of the aluminum alloy holding poles after terminating will be refined；
B, the temperature of the aluminum alloy holding poles after control annealing is at 360 ~ 440 DEG C, after aluminum alloy holding poles internal and external temperature is uniform,
The hot rolling predeformation of single pass 2 ~ 5% is carried out to it, the temperature for continuing to control aluminum alloy holding poles is 360 ~ 440 DEG C, is then carried out single
Heavy reduction rolling of the passage not less than 60% is deformed, rolling heavy slab, and heavy slab is carried out into water cooling or air cooling；
C, the heavy slab after cooling is subjected to 0.5-3h solution treatment at 450-550 DEG C, then water quenching；
Heavy slab after water quenching is carried out to 6h Pre-aging treatment at 150-250 DEG C, be then air-cooled to room temperature D,；
E, the cold-rolling deformation of single pass 40 ~ 60% heavy slab after room temperature will be air-cooled to is carried out, sheet material is obtained, then to plate
Material carries out 120 ~ 200 DEG C of whole Ageing Treatment, and processing time is 3 ~ 8h.
Preferably, the degenerate temperature of aluminum alloy holding poles is 460-500 DEG C in described step A.
Preferably, solid solubility temperature is 480-520 DEG C in described step C.
Preferably, in described hot rolling and cold-rolled process, roll rolling linear velocity is 0.4 ~ 0.6m/min.
Preferably, described aluminum alloy holding poles are any of 1-8 line aluminium alloy ingot blanks.
Preferably, described aluminum alloy holding poles are Al-Cu-Mg alloy ingot blank.
Preferably, the composition proportion of described Al-Cu-Mg alloy ingot blank is：Cu4.0 ~ 4.8%, Mg1.3 ~ 1.8%, Mn0.4
~ 0.6%, Ti0.1 ~ 0.3%, Zr0.1 ~ 0.3%, Er0.2 ~ 0.5%, remaining is Al.
Preferably, the casting method of described Al-Cu-Mg alloy ingot blank is：By described each composition at 740-780 DEG C
Lower carry out melting, protected in fusion process, and refined with carbon trichloride using sodium salt and degasification using nitrogen, Al- is made
Cu-Mg alloy ingot blanks.
Beneficial effects of the present invention are：
The milling method of the ultrahigh-strength aluminum alloy sheet material of the present invention, sheet material dendritic segregation problem can be eliminated, realize and close
Golden homogenization of composition；And the microhardness of alloy can be improved, it is ensured that its each several part mechanical property uniformity, ensure part
Performance；The intensity and its traumatic resistance of sheet material are improved simultaneously, extend its service life.
Brief description of the drawings
Fig. 1 is the micro-organization chart of the aluminum alloy plate materials of control group 1 of the present invention
Fig. 2-4 is the micro-organization chart of aluminum alloy plate materials prepared by 1-3 of embodiment of the present invention milling methods
Fig. 5 is the stress-strain curve of aluminum alloy plate materials prepared by the milling method of the embodiment of the present invention 5.
Embodiment
Below by specific embodiment, the present invention is described in detail.
Embodiment 1
The milling method of the ultrahigh-strength aluminum alloy sheet material of the present invention, comprises the following steps：
A, the homogenizing annealing 24h at 450 DEG C of the Al-Cu-Mg alloy ingot blank after terminating will be refined；
B, the temperature of the Al-Cu-Mg alloy ingot blank after control annealing is treated warm inside and outside Al-Cu-Mg alloy ingot blank at 360 DEG C
After degree is uniform, the hot rolling predeformation of single pass 2% is carried out to it, roll rolling linear velocity is 0.4m/min, continues to control Al-Cu-
The temperature of Mg alloy ingot blanks is 360 DEG C, then carries out the heavy reduction rolling deformation of single pass 60%, and roll rolling linear velocity is
0.4m/min, rolling heavy slab, heavy slab is subjected to water cooling or air cooling；
C, the heavy slab after cooling is subjected to 0.5h solution treatment at 450 DEG C, then water quenching；
Heavy slab after water quenching is carried out to 6h Pre-aging treatment at 150 DEG C, be then air-cooled to room temperature D,；
E, the cold-rolling deformation of single pass 40% heavy slab after room temperature will be air-cooled to is carried out, roll rolling linear velocity is 0.4m/
Min, sheet material is obtained, 120 DEG C of whole Ageing Treatment, processing time 3h are then carried out to sheet material.
The composition proportion of described Al-Cu-Mg alloy ingot blank is：Cu4.0%, Mg1.3%, Mn0.4%, Ti0.1%,
Zr0.1%, Er0.2%, remaining is Al.
The casting method of described Al-Cu-Mg alloy ingot blank is：Described each composition is subjected to melting at 740 DEG C,
Protected, and refined using sodium salt and carbon trichloride and degasification using nitrogen in fusion process, Al-Cu-Mg alloy ingot is made
Base.
Embodiment 2
The milling method of the ultrahigh-strength aluminum alloy sheet material of the present invention, comprises the following steps：
A, the homogenizing annealing 28h at 460 DEG C of the Al-Cu-Mg alloy ingot blank after terminating will be refined；
B, the temperature of the Al-Cu-Mg alloy ingot blank after control annealing is treated warm inside and outside Al-Cu-Mg alloy ingot blank at 380 DEG C
After degree is uniform, the hot rolling predeformation of single pass 3% is carried out to it, roll rolling linear velocity is 0.5m/min, continues to control Al-Cu-
The temperature of Mg alloy ingot blanks is 380 DEG C, then carries out the heavy reduction rolling deformation of single pass 62%, and roll rolling linear velocity is
0.5m/min, rolling heavy slab, heavy slab is subjected to water cooling or air cooling；
C, the heavy slab after cooling is subjected to 1h solution treatment at 480 DEG C, then water quenching；
Heavy slab after water quenching is carried out to 6h Pre-aging treatment at 180 DEG C, be then air-cooled to room temperature D,；
E, the cold-rolling deformation of single pass 45% heavy slab after room temperature will be air-cooled to is carried out, roll rolling linear velocity is 0.5m/
Min, sheet material is obtained, 140 DEG C of whole Ageing Treatment, processing time 5h are then carried out to sheet material.
The composition proportion of described Al-Cu-Mg alloy ingot blank is：Cu4.2%, Mg1.5%, Mn0.5%, Ti0.2%,
Zr0.2%, Er0.3%, remaining is Al.
The casting method of described Al-Cu-Mg alloy ingot blank is：Described each composition is subjected to melting at 75 DEG C,
Protected, and refined using sodium salt and carbon trichloride and degasification using nitrogen in fusion process, Al-Cu-Mg alloy ingot is made
Base.
Embodiment 3
The milling method of the ultrahigh-strength aluminum alloy sheet material of the present invention, comprises the following steps：
A, the homogenizing annealing 32h at 500 DEG C of the Al-Cu-Mg alloy ingot blank after terminating will be refined；
B, the temperature of the Al-Cu-Mg alloy ingot blank after control annealing is treated warm inside and outside Al-Cu-Mg alloy ingot blank at 400 DEG C
After degree is uniform, the hot rolling predeformation of single pass 4% is carried out to it, roll rolling linear velocity is 0.6m/min, continues to control Al-Cu-
The temperature of Mg alloy ingot blanks is 400 DEG C, then carries out the heavy reduction rolling deformation of single pass 65%, and roll rolling linear velocity is
0.6m/min, rolling heavy slab, heavy slab is subjected to water cooling or air cooling；
C, the heavy slab after cooling is subjected to 1.5h solution treatment at 500 DEG C, then water quenching；
Heavy slab after water quenching is carried out to 6h Pre-aging treatment at 200 DEG C, roll rolling linear velocity is 0.6m/ D,
Min, then it is air-cooled to room temperature；
E, the cold-rolling deformation of single pass 50% heavy slab after room temperature will be air-cooled to is carried out, sheet material is obtained, then sheet material is entered
The whole Ageing Treatment of 160 DEG C of row, processing time 6h.
The composition proportion of described Al-Cu-Mg alloy ingot blank is：Cu4.5%, Mg1.6%, Mn0.6%, Ti0.3%,
Zr0.3%, Er0.4%, remaining is Al.
The casting method of described Al-Cu-Mg alloy ingot blank is：Described each composition is subjected to melting at 760 DEG C,
Protected, and refined using sodium salt and carbon trichloride and degasification using nitrogen in fusion process, Al-Cu-Mg alloy ingot is made
Base.
Embodiment 4
The milling method of the ultrahigh-strength aluminum alloy sheet material of the present invention, comprises the following steps：
A, the homogenizing annealing 40h at 530 DEG C of the Al-Cu-Mg alloy ingot blank after terminating will be refined；
B, the temperature of the Al-Cu-Mg alloy ingot blank after control annealing is treated warm inside and outside Al-Cu-Mg alloy ingot blank at 420 DEG C
After degree is uniform, the hot rolling predeformation of single pass 5% is carried out to it, roll rolling linear velocity is 0.5m/min, continues to control Al-Cu-
The temperature of Mg alloy ingot blanks is 420 DEG C, then carries out the heavy reduction rolling deformation of single pass 66%, and roll rolling linear velocity is
0.5m/min, rolling heavy slab, heavy slab is subjected to water cooling or air cooling；
C, the heavy slab after cooling is subjected to 2h solution treatment at 520 DEG C, then water quenching；
Heavy slab after water quenching is carried out to 6h Pre-aging treatment at 220 DEG C, be then air-cooled to room temperature D,；
E, the cold-rolling deformation of single pass 55% heavy slab after room temperature will be air-cooled to is carried out, roll rolling linear velocity is 0.5m/
Min, sheet material is obtained, 180 DEG C of whole Ageing Treatment, processing time 7h are then carried out to sheet material.
The composition proportion of described Al-Cu-Mg alloy ingot blank is：Cu4.6%, Mg1.7%, Mn0.5%, Ti0.1%, Zr0.1 ~
0.3%, Er0.5%, remaining is Al.
The casting method of described Al-Cu-Mg alloy ingot blank is：Described each composition is subjected to melting at 770 DEG C,
Protected, and refined using sodium salt and carbon trichloride and degasification using nitrogen in fusion process, Al-Cu-Mg alloy ingot is made
Base.
Embodiment 5
The milling method of the ultrahigh-strength aluminum alloy sheet material of the present invention, comprises the following steps：
A, the homogenizing annealing 48h at 550 DEG C of the Al-Cu-Mg alloy ingot blank after terminating will be refined；
B, the temperature of the Al-Cu-Mg alloy ingot blank after control annealing is treated warm inside and outside Al-Cu-Mg alloy ingot blank at 440 DEG C
After degree is uniform, the hot rolling predeformation of single pass 5% is carried out to it, roll rolling linear velocity is 0.6m/min, continues to control Al-Cu-
The temperature of Mg alloy ingot blanks is 440 DEG C, then carries out the heavy reduction rolling deformation of single pass 68%, and roll rolling linear velocity is
0.6m/min, rolling heavy slab, heavy slab is subjected to water cooling or air cooling；
C, the heavy slab after cooling is subjected to 3h solution treatment at 550 DEG C, then water quenching；
Heavy slab after water quenching is carried out to 6h Pre-aging treatment at 250 DEG C, be then air-cooled to room temperature D,；
E, the cold-rolling deformation of single pass 60% heavy slab after room temperature will be air-cooled to is carried out, roll rolling linear velocity is 0.6m/
Min, sheet material is obtained, 200 DEG C of whole Ageing Treatment, processing time 8h are then carried out to sheet material.
The composition proportion of described Al-Cu-Mg alloy ingot blank is：Cu4.8%, Mg1.8%, Mn0.6%, Ti0.3%,
Zr0.3%, Er0. 0.5%, remaining is Al.
The casting method of described Al-Cu-Mg alloy ingot blank is：Described each composition is carried out at 740-780 DEG C
Melting, protected in fusion process, and refined with carbon trichloride using sodium salt and degasification using nitrogen, Al-Cu-Mg is made and closes
Ingot base.
Embodiment 6
The milling method of the ultrahigh-strength aluminum alloy sheet material of the present invention, comprises the following steps：
A, the homogenizing annealing 48h at 550 DEG C of the 2A12 aluminum alloy holding poles after terminating will be refined；
B, the temperature of the 2A12 aluminum alloy holding poles after control annealing treats that 2A12 aluminum alloy holding poles internal and external temperatures are equal at 440 DEG C
After even, the hot rolling predeformation of single pass 5% is carried out to it, roll rolling linear velocity is 0.6m/min, continues to control 2A12 aluminium alloys
The temperature of ingot blank is 440 DEG C, then carries out the heavy reduction rolling deformation of single pass 68%, roll rolling linear velocity is 0.6m/
Min, rolling heavy slab, heavy slab is subjected to water cooling or air cooling；
C, the heavy slab after cooling is subjected to 3h solution treatment at 550 DEG C, then water quenching；
Heavy slab after water quenching is carried out to 6h Pre-aging treatment at 250 DEG C, be then air-cooled to room temperature D,；
E, the cold-rolling deformation of single pass 60% heavy slab after room temperature will be air-cooled to is carried out, roll rolling linear velocity is 0.6m/
Min, sheet material is obtained, 200 DEG C of whole Ageing Treatment, processing time 8h are then carried out to sheet material.
The composition proportion of described 2A12 aluminum alloy holding poles is：Silicon Si≤0.50, Cu 3.8 ~ 4.9, Mg1.2 ~ 1.8, Zn
≤ 0.30, Mn0.30 ~ 0.9, Ti≤0.15, Ni≤0.10, Fe 0.000 ~ 0.500, Fe+Ni0.000 ~ 0.500, other are single
≤ 0.05 ,≤0.10, Al surpluses are added up to.
The casting method of described 2A12 aluminum alloy holding poles is：Described each composition is melted at 740-780 DEG C
Refining, protected in fusion process, and refined with carbon trichloride using sodium salt and degasification using nitrogen, 2A12 aluminium alloy ingots is made
Base.
Embodiment 7
The milling method of the ultrahigh-strength aluminum alloy sheet material of the present invention, comprises the following steps：
A, the homogenizing annealing 40h at 530 DEG C of 5083 aluminum alloy holding poles after terminating will be refined；
B, the temperature of 5083 aluminum alloy holding poles after control annealing treats that 5083 aluminum alloy holding poles internal and external temperatures are equal at 420 DEG C
After even, the hot rolling predeformation of single pass 5% is carried out to it, roll rolling linear velocity is 0.5m/min, continues to control 5083 aluminium alloys
The temperature of ingot blank is 420 DEG C, then carries out the heavy reduction rolling deformation of single pass 66%, roll rolling linear velocity is 0.5m/
Min, rolling heavy slab, heavy slab is subjected to water cooling or air cooling；
C, the heavy slab after cooling is subjected to 2h solution treatment at 520 DEG C, then water quenching；
Heavy slab after water quenching is carried out to 6h Pre-aging treatment at 220 DEG C, be then air-cooled to room temperature D,；
E, the cold-rolling deformation of single pass 55% heavy slab after room temperature will be air-cooled to is carried out, roll rolling linear velocity is 0.5m/
Min, sheet material is obtained, 180 DEG C of whole Ageing Treatment, processing time 7h are then carried out to sheet material.
The composition proportion of 5083 described aluminum alloy holding poles is：Cu4.6%, Mg1.7%, Mn0.5%, Ti0.1%, Zr0.1 ~
0.3%, Er0.5%, remaining is Al.
The casting method of 5083 described aluminum alloy holding poles is：Described each composition is subjected to melting at 770 DEG C, melted
Protected, and refined using sodium salt and carbon trichloride and degasification using nitrogen during refining, 5083 aluminum alloy holding poles are made.
Embodiment 8
The milling method of the ultrahigh-strength aluminum alloy sheet material of the present invention, comprises the following steps：
A, the homogenizing annealing 32h at 500 DEG C of 6082 aluminum alloy holding poles after terminating will be refined；
B, the temperature of 6082 aluminum alloy holding poles after control annealing treats that 6082 aluminum alloy holding poles internal and external temperatures are equal at 400 DEG C
After even, the hot rolling predeformation of single pass 4% is carried out to it, roll rolling linear velocity is 0.6m/min, continues to control 6082 aluminium alloys
The temperature of ingot blank is 400 DEG C, then carries out the heavy reduction rolling deformation of single pass 65%, roll rolling linear velocity is 0.6m/
Min, rolling heavy slab, heavy slab is subjected to water cooling or air cooling；
C, the heavy slab after cooling is subjected to 1.5h solution treatment at 500 DEG C, then water quenching；
Heavy slab after water quenching is carried out to 6h Pre-aging treatment at 200 DEG C, roll rolling linear velocity is 0.6m/ D,
Min, then it is air-cooled to room temperature；
E, the cold-rolling deformation of single pass 50% heavy slab after room temperature will be air-cooled to is carried out, sheet material is obtained, then sheet material is entered
The whole Ageing Treatment of 160 DEG C of row, processing time 6h.
The composition proportion of 6082 described aluminum alloy holding poles is：Si 0.7 ~ 1.3, Fe 0.50, Cu 0.10, Mn 0.40 ~
1.0, Mg:0.6 ~ 1.2, Cr 0.25, Zn 0.20, Ti 0.10, Al surplus.
The casting method of 6082 described aluminum alloy holding poles is：Described each composition is subjected to melting at 760 DEG C, melted
Protected, and refined using sodium salt and carbon trichloride and degasification using nitrogen during refining, 6082 aluminum alloy holding poles are made.
Embodiment 9
The milling method of the ultrahigh-strength aluminum alloy sheet material of the present invention, comprises the following steps：
A, the homogenizing annealing 28h at 460 DEG C of the 7A09 aluminum alloy holding poles after terminating will be refined；
B, the temperature of the 7A09 aluminum alloy holding poles after control annealing treats that 7A09 aluminum alloy holding poles internal and external temperatures are equal at 380 DEG C
After even, the hot rolling predeformation of single pass 3% is carried out to it, roll rolling linear velocity is 0.5m/min, continues to control 7A09 aluminium alloys
The temperature of ingot blank is 380 DEG C, then carries out the heavy reduction rolling deformation of single pass 62%, roll rolling linear velocity is 0.5m/
Min, rolling heavy slab, heavy slab is subjected to water cooling or air cooling；
C, the heavy slab after cooling is subjected to 1h solution treatment at 480 DEG C, then water quenching；
Heavy slab after water quenching is carried out to 6h Pre-aging treatment at 180 DEG C, be then air-cooled to room temperature D,；
E, the cold-rolling deformation of single pass 45% heavy slab after room temperature will be air-cooled to is carried out, roll rolling linear velocity is 0.5m/
Min, sheet material is obtained, 140 DEG C of whole Ageing Treatment, processing time 5h are then carried out to sheet material.
The composition proportion of described 7A09 aluminum alloy holding poles is：Si 0.50, Fe 0.50, Cu 1.2-2.0, Mn 0.15,
Mg 2.0-3.0, Cr 0.16-0.30, Zn 5.1-6.1, Ti 0.10, other single 0.05, total 0.10, Al surpluses.
The casting method of described 7A09 aluminum alloy holding poles is：Described each composition is subjected to melting at 75 DEG C, melted
Protected, and refined using sodium salt and carbon trichloride and degasification using nitrogen during refining, 7A09 aluminum alloy holding poles are made.
The contrast experiment of embodiment 10
Control group 1-5：By the present invention Al-Cu-Mg alloy ingot blank, 2A12 aluminum alloy holding poles, 5083 aluminum alloy holding poles,
6082 aluminum alloy holding poles, 7A09 aluminum alloy holding poles, are rolled under the conditions of common process respectively.
Conventional process steps include casting, cold rolling, solution treatment, timeliness pretreatment.In casting step, with 100 ~ 500 DEG C/
S cooling velocity is cooled to solidus temperature from liquidus temperature；In cold rolling step, it is 70 ~ 90% to control cold rolling reduction ratio；Gu
In molten processing step, aluminium alloy plate is heated to 500 ~ 560 DEG C with 80 ~ 120 DEG C/s firing rate, is incubated 5s ~ 15s, then
20 ~ 60 DEG C are cooled to 30 ~ 150 DEG C/s cooling velocity；In timeliness pre-treatment step, by aluminium alloy plate with 10 ~ 100 DEG C/s
Firing rate be heated to 85 ~ 120 DEG C, be incubated 5s ~ 15s, be then cooled to 20 ~ 60 DEG C with 30 ~ 150 DEG C/s cooling velocity.
Experimental group：The aluminum alloy plate materials prepared according to the milling method of the embodiment of the present invention 1 ~ 9.
Test control group 1-5 and experimental group 1-9 mechanical property, including tensile strength, elongation, comparing result such as table 1
It is shown：
The mechanical property of sheet material prepared by 1 each process of table
| Sample | Alloy | Tensile strength（25℃、MPa） | Elongation（%） |
| Control group 1 | Al-Cu-Mg | 500 | 10 |
| Embodiment 1 | Al-Cu-Mg | 600 | 12 |
| Embodiment 2 | Al-Cu-Mg | 615 | 14 |
| Embodiment 3 | Al-Cu-Mg | 630 | 15 |
| Embodiment 4 | Al-Cu-Mg | 644 | 18 |
| Embodiment 5 | Al-Cu-Mg | 652 | 16 |
| Control group 2 | 2A12 | 410 | 12 |
| Embodiment 6 | 2A12 | 496 | 15 |
| Control group 3 | 5083 | 327 | 30 |
| Embodiment 7 | 5083 | 418 | 36 |
| Control group 4 | 6082 | 245 | 10 |
| Embodiment 8 | 6082 | 316 | 15 |
| Control group 5 | 7A09 | 530 | 5 |
| Embodiment 9 | 7A09 | 636 | 8 |
As shown in Table 1, the sheet material that prepared by 1-5 of embodiment of the present invention milling method, tensile strength is than 1 high 20- of control group
30%, extensibility is than 1 high 20-80% of control group；The sheet material of the preparation of embodiment 6, tensile strength is than control group 2 high 21%, elongation
Than control group 2 high 23%；The sheet material of the preparation of embodiment 7, for tensile strength than control group 3 high 28%, elongation is higher than control group 2
20%；The sheet material of the preparation of embodiment 8, tensile strength is than control group 4 high 29%, and elongation is than control group 2 high 50%；Embodiment 9
The sheet material of preparation, tensile strength is than control group 5 high 20%, and elongation is than control group 2 high 20%；It can be seen that the rolling side by the present invention
Sheet material prepared by method, its mechanical property are substantially better than the sheet material of conventional method preparation.
Embodiment 7
It can be seen that from accompanying drawing 1：A large amount of thick precipitated phases, this table in the as-cast structure figure of common aluminum alloy sheet material be present
The structure property uniformity of bright alloy is not ideal enough.
It can be seen that from accompanying drawing 2-4：Aluminum alloy plate materials prepared by milling method of the present invention, latticed precipitated phase have disappeared
Or partial disappearance, also there was only less amount of graininess precipitate in the case of partial disappearance, have been achieved for larger improvement, body
More preferable uniformization effect is showed.
As seen from Figure 5, the Al-Cu-Mg alloy sheet material of the embodiment of the present invention 5 is when stress is less than 652MPa, stress
Increase with the increase of strain, in 652MPa, reach capacity load, and strain now is 16%；After 652MPa, sheet material
Uneven plastic deformation takes place and forms necking down, stress decrease, sheet material is broken when last stress reaches 630Mpa.
Claims (6)
1. a kind of milling method of ultrahigh-strength aluminum alloy sheet material, it is characterised in that comprise the following steps：
A, the homogenizing annealing 24-48h at 450-550 DEG C of the aluminum alloy holding poles after terminating will be refined；
B, the temperature of the aluminum alloy holding poles after control annealing is at 360 ~ 440 DEG C, after aluminum alloy holding poles internal and external temperature is uniform, to it
The hot rolling predeformation of single pass 2 ~ 5% is carried out, the temperature for continuing to control aluminum alloy holding poles is 360 ~ 440 DEG C, then carries out single pass
Rolling deformation under big pressure amount not less than 60%, rolling heavy slab, heavy slab is subjected to water cooling or air cooling；
C, the heavy slab after cooling is subjected to 0.5-3h solution treatment at 450-550 DEG C, then water quenching；
Heavy slab after water quenching is carried out to 6h Pre-aging treatment at 150-250 DEG C, be then air-cooled to room temperature D,；
E, the cold-rolling deformation of single pass 40 ~ 60% heavy slab after room temperature will be air-cooled to is carried out, sheet material is obtained, then sheet material is entered
The whole Ageing Treatment of 120 ~ 200 DEG C of row, processing time are 3 ~ 8h；
Described aluminum alloy holding poles are Al-Cu-Mg alloy ingot blank.
2. the milling method of ultrahigh-strength aluminum alloy sheet material according to claim 1, it is characterised in that：Described step A
The annealing temperature of middle aluminum alloy holding poles is 460-500 DEG C.
3. the milling method of ultrahigh-strength aluminum alloy sheet material according to claim 1, it is characterised in that：Described step C
Middle solid solubility temperature is 480-520 DEG C.
4. the milling method of ultrahigh-strength aluminum alloy sheet material according to claim 1, it is characterised in that：Described hot rolling and
In cold-rolled process, roll rolling linear velocity is 0.4 ~ 0.6m/min.
5. the milling method of ultrahigh-strength aluminum alloy sheet material according to claim 1, it is characterised in that described Al-Cu-
The composition proportion of Mg alloy ingot blanks is：Cu4.0 ~ 4.8%, Mg1.3 ~ 1.8%, Mn0.4 ~ 0.6%, Ti0.1 ~ 0.3%, Zr0.1 ~
0.3%, Er0.2 ~ 0.5%, remaining is Al.
6. the milling method of ultrahigh-strength aluminum alloy sheet material according to claim 5, it is characterised in that described Al-Cu-
The casting method of Mg alloy ingot blanks is：Described each composition is subjected to melting at 740-780 DEG C, nitrogen is used in fusion process
Gas shielded, and use sodium salt is refined with carbon trichloride and degasification, and Al-Cu-Mg alloy ingot blank is made.
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| CN107723635A (en) * | 2017-11-06 | 2018-02-23 | 吉林大学 | A kind of processing method of high-strength aluminum alloy |
| PT3821051T (en) * | 2018-10-31 | 2023-05-31 | Novelis Koblenz Gmbh | Method of manufacturing a 2xxx-series aluminium alloy plate product having improved fatigue failure resistance |
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| CN109898000B (en) * | 2019-03-29 | 2020-12-15 | 郑州轻研合金科技有限公司 | Ultrahigh-strength heat-resistant aluminum alloy and preparation method thereof |
| CN112126830B (en) * | 2019-06-25 | 2023-07-28 | 广西大学 | Preparation and heat treatment process of high-strength high-plasticity Al-Mg-Si-Sc aluminum alloy plate |
| CN111020323A (en) * | 2019-12-31 | 2020-04-17 | 湖南恒佳新材料科技有限公司 | Rolling method of ultrahigh-strength aluminum alloy plate |
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| CN112981195B (en) * | 2021-02-20 | 2021-12-21 | 太原理工大学 | High-strength aluminum-magnesium-silicon-calcium conductive aluminum alloy and preparation method thereof |
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