CN110218921A - A kind of processing method of 2024 aluminium alloy sheet of T4 state - Google Patents
A kind of processing method of 2024 aluminium alloy sheet of T4 state Download PDFInfo
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- CN110218921A CN110218921A CN201910546418.5A CN201910546418A CN110218921A CN 110218921 A CN110218921 A CN 110218921A CN 201910546418 A CN201910546418 A CN 201910546418A CN 110218921 A CN110218921 A CN 110218921A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/18—Alloys based on aluminium with copper as the next major constituent with zinc
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- 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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- 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
- 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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Abstract
The invention belongs to technical field of aluminum alloy technology, it is related to a kind of processing method of 2024 aluminium alloy sheet of T4 state, including founding, homogenization, ingot casting heating, hot rolling, cold rolling, stretch-bending straightening, box annealing, continuous annealing and finishing, box annealing is increased before solution hardening compared with the existing technology, discharge the internal stress that cold rolling process generates, the inhomogeneities of web width and length direction upper stress is reduced, there are deformed steel strips for effective 2024 aluminium alloy sheet of T4 state for solving the problems, such as prior art preparation.
Description
Technical field
The invention belongs to technical field of aluminum alloy technology, are related to a kind of processing method of 2024 aluminium alloy sheet of T4 state.
Background technique
2024 aluminium alloys belong to Al-Cu-Mg line aluminium alloy, are heat-treatable strengthened aluminium alloy, have high-intensitive, low ratio
The advantages that weight, good heat resistance and higher fatigue strength, it is widely used in the fields such as Aeronautics and Astronautics.2024 aluminium alloys volume
The production technology of material T4 state thin plate are as follows: founding → soaking → heating → hot rolling → cold rolling → continuous annealing → finishing → crosscutting.It adopts
2024 thin plate of T4 state aluminium alloy produced with this production technology, can meet traditional performance requirement, but can have various problems, cause
The rejection rate of plate increases.Wherein, plate shape problem is one of the major issue for causing plate rejection rate to increase.
Plate shape problem refers to that related mark is not achieved in coiled material longitudinal unevenness, lateral unevenness and local unevenness after crosscutting
Alignment request.Coiled material cold rolling state is crisp and hard, and internal stress is larger after cold rolling, and width direction upper stress is unevenly distributed.Air cushion
The stove heating time is short, and during heating, cold rolling state coiled material stress cannot discharge completely, and can generate answer after quenching
Power.The stress that cold rolling state does not discharge is superimposed with the stress vector that quenching generates, so that strip width direction, length direction stress are not
Equilibrium causes crosscutting rear deformed steel strip.
For the generation for preventing 2024 aluminium alloy sheet deformed steel strip of T4 state, solid solution craft can be adjusted in air cushion quenching and is consolidated
Elongation percentage after molten.But plate biggish for stress after cold rolling, adjust solid solution craft and solid solution after elongation percentage without
Method achievees the purpose that rectification plate shape.
Summary of the invention
In view of this, the present invention is in order to solve 2024 aluminium alloy sheet of T4 state prepared by prior art, there are deformed steel strips
Problem provides a kind of processing method of 2024 aluminium alloy sheet of T4 state.
In order to achieve the above objectives, the present invention provides a kind of processing method of 2024 aluminium alloy sheet of T4 state, including following step
It is rapid:
A, founding: ingredient is carried out according to 2024 aluminum alloy chemical compositions and its content range, and smelting casting obtains institute
Need ingot casting；
B, it homogenizes: the aluminium alloy cast ingot after founding is subjected to Homogenization Treatments in soaking pit, homogenization is heat-treated
Aluminium alloy cast ingot afterwards cuts end to end and mills aluminium alloy cast ingot surface scull layer；
C, ingot casting heats: the aluminium alloy cast ingot after homogenization heat treatment, which is placed in heating furnace, to be heated, with 30~60 DEG C/h's
Heating rate is heated to 440~480 DEG C, comes out of the stove after keeping the temperature 2~18h；
D, hot rolling: the aluminium alloy cast ingot hot rolling after coming out of the stove is coiled material, and coil thickness is 3.5~5mm, and finishing temperature is
200~330 DEG C；
E, cold rolling: the coiled material after hot rolling is rolled into cold rolling coil by 50~80% cold processing ratio, cold rolling coil is with a thickness of 1
~2mm, wherein cold processing ratio=(hot rolled coil thickness-cold rolling coil thickness)/hot rolled coil thickness * 100%；
F, stretch-bending straightening: cold rolling coil is stretched on withdrawal straightening machine, be bent it is orthopedic, elongation percentage be 0.6%~1.0%,
Aluminum alloy coiled materials after stretch-bending straightening carry out cleaning oil removing；
G, box annealing: the aluminum alloy coiled materials after stretch-bending straightening place box-annealing furnace and anneal, annealing temperature 350
~410 DEG C, soaking time is 1~4h, cooling velocity≤30 DEG C/h, tapping temperature≤260 DEG C；
H, continuous annealing: by the aluminum alloy coiled materials after box annealing at air-cushion type glowing furnace progress solution treatment, solid solution
The temperature of reason is 495~505 DEG C, and the time is 180s~300s, is quenched in a manner of water cooling after solid solution；
I, finishing: the aluminum alloy coiled materials after solution hardening are subjected to finishing processing, with thin plate after crosscutting and natrual ageing 96h
Form pack check and accept.
Further, in step A 2024 aluminium alloys according to following mass percent ingredient: Si :≤0.25%, Fe :≤
0.35%, Cu:4.55~4.65%, Mn:0.5~0.7%, Mg:1.55~1.65%, Cr:0.1%, Zn:0.2%, Ti :≤
0.12%, impurity: single≤0.05%, total amount≤0.15%, surplus Al.
Further, step A uses semicontinuous water cooling casting mode by liquid aluminium alloy founding for aluminium alloy cast ingot.
Further, it is liquid aluminium that prepared aluminium alloy stock is added in smelting furnace melting after evenly mixing by step A
Alloy by standing, is refined, is skimmed, after line degasification, filter progress, is aluminium alloy cast ingot by liquid aluminium alloy founding.
Further, the temperature of Homogenization Treatments is 495 ± 5 DEG C in step B, and soaking time is 22~25h, the aluminium after coming out of the stove
Alloy cast ingot strong wind cooling is to room temperature.
Further, prior to 450 DEG C hot roughing of aluminium alloy cast ingot after step D comes out of the stove to 35mm, subsequent hot finishing to 3.5~
5mm。
The beneficial effects of the present invention are:
The processing method of 2024 aluminium alloy sheet of T4 state disclosed in this invention, is moved back by increasing before air cushion quenching solution
The mode of firer's sequence, the internal stress that release cold rolling process generates, reduces the inhomogeneities of web width and length direction upper stress,
And the annealing operation does not cause the abnormal growth of subsequent continuous annealing process plate inside metallographic, can keep plate tissue
And under the premise of performance is stablized, the effective plate shape for improving 2024 aluminium alloy of T4 state improves plate yield rate.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.Target of the invention and other advantages can be realized by following specification and
It obtains.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
Embodiment 1
A kind of processing method of 2024 aluminium alloy sheet of T4 state, comprising the following steps:
A, founding: carrying out ingredient according to 2024 aluminum alloy chemical compositions and its content range, and prepared aluminium alloy is former
It is liquid aluminium alloy that material, which is added in smelting furnace melting after evenly mixing, by standing, refines, skims, online degasification, filterer
It is aluminium alloy cast ingot, aluminium alloy cast ingot specification by liquid aluminium alloy founding are as follows: 500 × 1680 × 7000mm, wherein aluminium closes after sequence
Golden raw material each element mass percent proportion is as follows:
| Element | Si | Fe | Cu | Mn | Mg | Ni | Zn | Ti | Impurity | Al |
| Content | 0.04 | 0.08 | 4.2 | 0.5 | 1.48 | 0.05 | 0.06 | 0.03 | 0.15 | Surplus |
B, it homogenizes: the aluminium alloy cast ingot after founding is subjected to Homogenization Treatments in soaking pit, homogenization is heat-treated
Aluminium alloy cast ingot afterwards cuts end to end and mills aluminium alloy cast ingot surface scull layer, and wherein the temperature of Homogenization Treatments is 495 DEG C,
Soaking time is aluminium alloy cast ingot strong wind cooling after coming out of the stove to room temperature for 24 hours；
C, ingot casting heats: the aluminium alloy cast ingot after homogenization heat treatment, which is placed in heating furnace, to be heated, with the heating of 45 DEG C/h
Speed is heated to 450 DEG C, comes out of the stove after keeping the temperature 15h；
D, hot rolling: by prior to 450 DEG C hot roughing of the aluminium alloy cast ingot after coming out of the stove to 35mm, subsequent hot finishing to 4.5mm is whole
Rolling temperature is 310 DEG C；
E, cold rolling: being rolled into cold rolling coil by 66.7% cold processing ratio for the coiled material after hot rolling, cold rolling coil with a thickness of
1.5mm；
F, stretch-bending straightening: cold rolling coil is stretched on withdrawal straightening machine, is bent orthopedic, elongation percentage 0.6%, stretch-bending straightening
Aluminum alloy coiled materials afterwards carry out cleaning oil removing；
G, box annealing: the aluminum alloy coiled materials after stretch-bending straightening place box-annealing furnace and anneal, annealing temperature 410
DEG C, soaking time 3h, 26 DEG C/h of cooling velocity, 250 DEG C of tapping temperature；
H, continuous annealing: by the aluminum alloy coiled materials after box annealing at air-cushion type glowing furnace progress solution treatment, solid solution
The temperature of reason is 498 DEG C, and time 240s is quenched in a manner of water cooling after solid solution；
I, finishing: the aluminum alloy coiled materials after solution hardening are subjected to finishing processing, with thin plate after crosscutting and natrual ageing 96h
Form pack check and accept.
Embodiment 2
A kind of processing method of 2024 aluminium alloy sheet of T4 state, comprising the following steps:
A, founding: carrying out ingredient according to 2024 aluminum alloy chemical compositions and its content range, and prepared aluminium alloy is former
It is liquid aluminium alloy that material, which is added in smelting furnace melting after evenly mixing, by standing, refines, skims, online degasification, filterer
It is aluminium alloy cast ingot, aluminium alloy cast ingot specification by liquid aluminium alloy founding are as follows: 500 × 1680 × 7000mm, wherein aluminium closes after sequence
Golden raw material each element mass percent proportion is as follows:
| Element | Si | Fe | Cu | Mn | Mg | Ni | Zn | Ti | Impurity | Al |
| Content | 0.04 | 0.08 | 4.2 | 0.5 | 1.48 | 0.05 | 0.06 | 0.03 | 0.15 | Surplus |
B, it homogenizes: the aluminium alloy cast ingot after founding is subjected to Homogenization Treatments in soaking pit, homogenization is heat-treated
Aluminium alloy cast ingot afterwards cuts end to end and mills aluminium alloy cast ingot surface scull layer, and wherein the temperature of Homogenization Treatments is 495 DEG C,
Soaking time is aluminium alloy cast ingot strong wind cooling after coming out of the stove to room temperature for 24 hours；
C, ingot casting heats: the aluminium alloy cast ingot after homogenization heat treatment, which is placed in heating furnace, to be heated, with the heating of 45 DEG C/h
Speed is heated to 450 DEG C, comes out of the stove after keeping the temperature 15h；
D, hot rolling: by prior to 450 DEG C hot roughing of the aluminium alloy cast ingot after coming out of the stove to 35mm, subsequent hot finishing to 4.0mm is whole
Rolling temperature is 310 DEG C；
E, cold rolling: being rolled into cold rolling coil by 62.5% cold processing ratio for the coiled material after hot rolling, cold rolling coil with a thickness of
1.5mm；
F, stretch-bending straightening: cold rolling coil is stretched on withdrawal straightening machine, be bent it is orthopedic, elongation percentage be 0.6%~1.0%,
Aluminum alloy coiled materials after stretch-bending straightening carry out cleaning oil removing；
G, box annealing: the aluminum alloy coiled materials after stretch-bending straightening place box-annealing furnace and anneal, annealing temperature 410
DEG C, soaking time 3h, 26 DEG C/h of cooling velocity, 250 DEG C of tapping temperature；
H, continuous annealing: by the aluminum alloy coiled materials after box annealing at air-cushion type glowing furnace progress solution treatment, solid solution
The temperature of reason is 498 DEG C, and time 300s is quenched in a manner of water cooling after solid solution；
I, finishing: the aluminum alloy coiled materials after solution hardening are subjected to finishing processing, with thin plate after crosscutting and natrual ageing 96h
Form pack check and accept.
Embodiment 3
A kind of processing method of 2024 aluminium alloy sheet of T4 state, comprising the following steps:
A, founding: carrying out ingredient according to 2024 aluminum alloy chemical compositions and its content range, and prepared aluminium alloy is former
It is liquid aluminium alloy that material, which is added in smelting furnace melting after evenly mixing, by standing, refines, skims, online degasification, filterer
It is aluminium alloy cast ingot, aluminium alloy cast ingot specification by liquid aluminium alloy founding are as follows: 500 × 1680 × 7000mm, wherein aluminium closes after sequence
Golden raw material each element mass percent proportion is as follows:
| Element | Si | Fe | Cu | Mn | Mg | Ni | Zn | Ti | Impurity | Al |
| Content | 0.04 | 0.08 | 4.2 | 0.5 | 1.48 | 0.05 | 0.06 | 0.03 | 0.15 | Surplus |
B, it homogenizes: the aluminium alloy cast ingot after founding is subjected to Homogenization Treatments in soaking pit, homogenization is heat-treated
Aluminium alloy cast ingot afterwards cuts end to end and mills aluminium alloy cast ingot surface scull layer, and wherein the temperature of Homogenization Treatments is 495 DEG C,
Soaking time is aluminium alloy cast ingot strong wind cooling after coming out of the stove to room temperature for 24 hours；
C, ingot casting heats: the aluminium alloy cast ingot after homogenization heat treatment, which is placed in heating furnace, to be heated, with the heating of 45 DEG C/h
Speed is heated to 450 DEG C, comes out of the stove after keeping the temperature 15h；
D, hot rolling: by prior to 450 DEG C hot roughing of the aluminium alloy cast ingot after coming out of the stove to 35mm, subsequent hot finishing to 5.0mm is whole
Rolling temperature is 310 DEG C；
E, cold rolling: being rolled into cold rolling coil by 70% cold processing ratio for the coiled material after hot rolling, cold rolling coil with a thickness of
1.5mm；
F, stretch-bending straightening: cold rolling coil is stretched on withdrawal straightening machine, be bent it is orthopedic, elongation percentage be 0.6%~1.0%,
Aluminum alloy coiled materials after stretch-bending straightening carry out cleaning oil removing；
G, box annealing: the aluminum alloy coiled materials after stretch-bending straightening place box-annealing furnace and anneal, annealing temperature 410
DEG C, soaking time 3h, 26 DEG C/h of cooling velocity, 250 DEG C of tapping temperature；
H, continuous annealing: by the aluminum alloy coiled materials after box annealing at air-cushion type glowing furnace progress solution treatment, solid solution
The temperature of reason is 498 DEG C, and time 240s is quenched in a manner of water cooling after solid solution；
I, finishing: the aluminum alloy coiled materials after solution hardening are subjected to finishing processing, with thin plate after crosscutting and natrual ageing 96h
Form pack check and accept.
Embodiment 4
A kind of processing method of 2024 aluminium alloy sheet of T4 state, comprising the following steps:
A, founding: carrying out ingredient according to 2024 aluminum alloy chemical compositions and its content range, and prepared aluminium alloy is former
It is liquid aluminium alloy that material, which is added in smelting furnace melting after evenly mixing, by standing, refines, skims, online degasification, filterer
It is aluminium alloy cast ingot, aluminium alloy cast ingot specification by liquid aluminium alloy founding are as follows: 500 × 1680 × 7000mm, wherein aluminium closes after sequence
Golden raw material each element mass percent proportion is as follows:
| Element | Si | Fe | Cu | Mn | Mg | Ni | Zn | Ti | Impurity | Al |
| Content | 0.04 | 0.08 | 4.2 | 0.5 | 1.48 | 0.05 | 0.06 | 0.03 | 0.15 | Surplus |
B, it homogenizes: the aluminium alloy cast ingot after founding is subjected to Homogenization Treatments in soaking pit, homogenization is heat-treated
Aluminium alloy cast ingot afterwards cuts end to end and mills aluminium alloy cast ingot surface scull layer, and wherein the temperature of Homogenization Treatments is 495 DEG C,
Soaking time is aluminium alloy cast ingot strong wind cooling after coming out of the stove to room temperature for 24 hours；
C, ingot casting heats: the aluminium alloy cast ingot after homogenization heat treatment, which is placed in heating furnace, to be heated, with the heating of 45 DEG C/h
Speed is heated to 450 DEG C, comes out of the stove after keeping the temperature 15h；
D, hot rolling: by prior to 450 DEG C hot roughing of the aluminium alloy cast ingot after coming out of the stove to 35mm, subsequent hot finishing to 3.5mm is whole
Rolling temperature is 312 DEG C；
E, cold rolling: being rolled into cold rolling coil by 71.4% cold processing ratio for the coiled material after hot rolling, cold rolling coil with a thickness of
1.0mm；
F, stretch-bending straightening: cold rolling coil is stretched on withdrawal straightening machine, be bent it is orthopedic, elongation percentage be 0.6%~1.0%,
Aluminum alloy coiled materials after stretch-bending straightening carry out cleaning oil removing；
G, box annealing: the aluminum alloy coiled materials after stretch-bending straightening place box-annealing furnace and anneal, annealing temperature 410
DEG C, soaking time 3h, 26 DEG C/h of cooling velocity, 250 DEG C of tapping temperature；
H, continuous annealing: by the aluminum alloy coiled materials after box annealing at air-cushion type glowing furnace progress solution treatment, solid solution
The temperature of reason is 498 DEG C, and time 180s is quenched in a manner of water cooling after solid solution；
I, finishing: the aluminum alloy coiled materials after solution hardening are subjected to finishing processing, with thin plate after crosscutting and natrual ageing 96h
Form pack check and accept.
Embodiment 5
A kind of processing method of 2024 aluminium alloy sheet of T4 state, comprising the following steps:
A, founding: carrying out ingredient according to 2024 aluminum alloy chemical compositions and its content range, and prepared aluminium alloy is former
It is liquid aluminium alloy that material, which is added in smelting furnace melting after evenly mixing, by standing, refines, skims, online degasification, filterer
It is aluminium alloy cast ingot, aluminium alloy cast ingot specification by liquid aluminium alloy founding are as follows: 500 × 1680 × 7000mm, wherein aluminium closes after sequence
Golden raw material each element mass percent proportion is as follows:
| Element | Si | Fe | Cu | Mn | Mg | Ni | Zn | Ti | Impurity | Al |
| Content | 0.04 | 0.08 | 4.2 | 0.5 | 1.48 | 0.05 | 0.06 | 0.03 | 0.15 | Surplus |
B, it homogenizes: the aluminium alloy cast ingot after founding is subjected to Homogenization Treatments in soaking pit, homogenization is heat-treated
Aluminium alloy cast ingot afterwards cuts end to end and mills aluminium alloy cast ingot surface scull layer, and wherein the temperature of Homogenization Treatments is 495 DEG C,
Soaking time is aluminium alloy cast ingot strong wind cooling after coming out of the stove to room temperature for 24 hours；
C, ingot casting heats: the aluminium alloy cast ingot after homogenization heat treatment, which is placed in heating furnace, to be heated, with the heating of 45 DEG C/h
Speed is heated to 450 DEG C, comes out of the stove after keeping the temperature 15h；
D, hot rolling: by prior to 450 DEG C hot roughing of the aluminium alloy cast ingot after coming out of the stove to 35mm, subsequent hot finishing to 5.0mm is whole
Rolling temperature is 308 DEG C；
E, cold rolling: being rolled into cold rolling coil by 60% cold processing ratio for the coiled material after hot rolling, cold rolling coil with a thickness of
2.0mm；
F, stretch-bending straightening: cold rolling coil is stretched on withdrawal straightening machine, be bent it is orthopedic, elongation percentage be 0.6%~1.0%,
Aluminum alloy coiled materials after stretch-bending straightening carry out cleaning oil removing；
G, box annealing: the aluminum alloy coiled materials after stretch-bending straightening place box-annealing furnace and anneal, annealing temperature 410
DEG C, soaking time 3h, 26 DEG C/h of cooling velocity, 250 DEG C of tapping temperature；
H, continuous annealing: by the aluminum alloy coiled materials after box annealing at air-cushion type glowing furnace progress solution treatment, solid solution
The temperature of reason is 498 DEG C, and time 300s is quenched in a manner of water cooling after solid solution；
I, finishing: the aluminum alloy coiled materials after solution hardening are subjected to finishing processing, with thin plate after crosscutting and natrual ageing 96h
Form pack check and accept.
Comparative example 1
A kind of processing method of 2024 aluminium alloy sheet of T4 state, comprising the following steps:
A, founding: carrying out ingredient according to 2024 aluminum alloy chemical compositions and its content range, and prepared aluminium alloy is former
It is liquid aluminium alloy that material, which is added in smelting furnace melting after evenly mixing, by standing, refines, skims, online degasification, filterer
It is aluminium alloy cast ingot, aluminium alloy cast ingot specification by liquid aluminium alloy founding are as follows: 500 × 1680 × 7000mm, wherein aluminium closes after sequence
Golden raw material each element mass percent proportion is as follows:
| Element | Si | Fe | Cu | Mn | Mg | Ni | Zn | Ti | Impurity | Al |
| Content | 0.04 | 0.08 | 4.2 | 0.5 | 1.48 | 0.05 | 0.06 | 0.03 | 0.15 | Surplus |
B, it homogenizes: the aluminium alloy cast ingot after founding is subjected to Homogenization Treatments in soaking pit, homogenization is heat-treated
Aluminium alloy cast ingot afterwards cuts end to end and mills aluminium alloy cast ingot surface scull layer, and wherein the temperature of Homogenization Treatments is 495 DEG C,
Soaking time is aluminium alloy cast ingot strong wind cooling after coming out of the stove to room temperature for 24 hours；
C, ingot casting heats: the aluminium alloy cast ingot after homogenization heat treatment, which is placed in heating furnace, to be heated, with the heating of 45 DEG C/h
Speed is heated to 450 DEG C, comes out of the stove after keeping the temperature 15h；
D, hot rolling: by prior to 450 DEG C hot roughing of the aluminium alloy cast ingot after coming out of the stove to 35mm, subsequent hot finishing to 4.5mm is whole
Rolling temperature is 310 DEG C；
E, cold rolling: being rolled into cold rolling coil by 66.7% cold processing ratio for the coiled material after hot rolling, cold rolling coil with a thickness of
1.5mm；
F, stretch-bending straightening: cold rolling coil is stretched on withdrawal straightening machine, is bent orthopedic, elongation percentage 0.6%, stretch-bending straightening
Aluminum alloy coiled materials afterwards carry out cleaning oil removing；
G, continuous annealing: carrying out solution treatment in air-cushion type glowing furnace for the aluminum alloy coiled materials after cold rolling, solution treatment
Temperature is 498 DEG C, and time 180s is quenched in a manner of water cooling after solid solution；
H, finishing: the aluminum alloy coiled materials after solution hardening are subjected to finishing processing, with thin plate after crosscutting and natrual ageing 96h
Form pack check and accept.
Comparative example 2
A kind of processing method of 2024 aluminium alloy sheet of T4 state, comprising the following steps:
A, founding: carrying out ingredient according to 2024 aluminum alloy chemical compositions and its content range, and prepared aluminium alloy is former
It is liquid aluminium alloy that material, which is added in smelting furnace melting after evenly mixing, by standing, refines, skims, online degasification, filterer
It is aluminium alloy cast ingot, aluminium alloy cast ingot specification by liquid aluminium alloy founding are as follows: 500 × 1680 × 7000mm, wherein aluminium closes after sequence
Golden raw material each element mass percent proportion is as follows:
| Element | Si | Fe | Cu | Mn | Mg | Ni | Zn | Ti | Impurity | Al |
| Content | 0.04 | 0.08 | 4.2 | 0.5 | 1.48 | 0.05 | 0.06 | 0.03 | 0.15 | Surplus |
B, it homogenizes: the aluminium alloy cast ingot after founding is subjected to Homogenization Treatments in soaking pit, homogenization is heat-treated
Aluminium alloy cast ingot afterwards cuts end to end and mills aluminium alloy cast ingot surface scull layer, and wherein the temperature of Homogenization Treatments is 470 DEG C,
Soaking time is aluminium alloy cast ingot strong wind cooling after coming out of the stove to room temperature for 24 hours；
C, ingot casting heats: the aluminium alloy cast ingot after homogenization heat treatment, which is placed in heating furnace, to be heated, with 30~60 DEG C/h's
Heating rate is heated to 440~480 DEG C, comes out of the stove after keeping the temperature 15h；
D, hot rolling: by prior to 450 DEG C hot roughing of the aluminium alloy cast ingot after coming out of the stove to 35mm, subsequent hot finishing to 3.5mm is whole
Rolling temperature is 200~330 DEG C；
E, cold rolling: being rolled into cold rolling coil by 71.4% cold processing ratio for the coiled material after hot rolling, cold rolling coil with a thickness of
1.0mm；
F, stretch-bending straightening: cold rolling coil is stretched on withdrawal straightening machine, is bent orthopedic, elongation percentage 0.6%, stretch-bending straightening
Aluminum alloy coiled materials afterwards carry out cleaning oil removing；
G, continuous annealing: carrying out solution treatment in air-cushion type glowing furnace for the aluminum alloy coiled materials after cold rolling, solution treatment
Temperature is 498 DEG C, and time 180s is quenched in a manner of water cooling after solid solution；
H, finishing: the aluminum alloy coiled materials after solution hardening are subjected to finishing processing, with thin plate after crosscutting and natrual ageing 96h
Form pack check and accept.
Comparative example 3
A kind of processing method of 2024 aluminium alloy sheet of T4 state, comprising the following steps:
A, founding: carrying out ingredient according to 2024 aluminum alloy chemical compositions and its content range, and prepared aluminium alloy is former
It is liquid aluminium alloy that material, which is added in smelting furnace melting after evenly mixing, by standing, refines, skims, online degasification, filterer
It is aluminium alloy cast ingot, aluminium alloy cast ingot specification by liquid aluminium alloy founding are as follows: 500 × 1680 × 7000mm, wherein aluminium closes after sequence
Golden raw material each element mass percent proportion is as follows:
| Element | Si | Fe | Cu | Mn | Mg | Ni | Zn | Ti | Impurity | Al |
| Content | 0.04 | 0.08 | 4.2 | 0.5 | 1.48 | 0.05 | 0.06 | 0.03 | 0.15 | Surplus |
B, it homogenizes: the aluminium alloy cast ingot after founding is subjected to Homogenization Treatments in soaking pit, homogenization is heat-treated
Aluminium alloy cast ingot afterwards cuts end to end and mills aluminium alloy cast ingot surface scull layer, and wherein the temperature of Homogenization Treatments is 495 DEG C,
Soaking time is aluminium alloy cast ingot strong wind cooling after coming out of the stove to room temperature for 24 hours；
C, ingot casting heats: the aluminium alloy cast ingot after homogenization heat treatment, which is placed in heating furnace, to be heated, with the heating of 45 DEG C/h
Speed is heated to 450 DEG C, comes out of the stove after keeping the temperature 15h；
D, hot rolling: by prior to 450 DEG C hot roughing of the aluminium alloy cast ingot after coming out of the stove to 35mm, subsequent hot finishing to 5.0mm is whole
Rolling temperature is 310 DEG C；
F, stretch-bending straightening: cold rolling coil is stretched on withdrawal straightening machine, is bent orthopedic, elongation percentage 0.6%, stretch-bending straightening
Aluminum alloy coiled materials afterwards carry out cleaning oil removing；
G, continuous annealing: carrying out solution treatment in air-cushion type glowing furnace for the aluminum alloy coiled materials after cold rolling, solution treatment
Temperature is 498 DEG C, and time 240s is quenched in a manner of water cooling after solid solution；
H, finishing: the aluminum alloy coiled materials after solution hardening are subjected to finishing processing, with thin plate after crosscutting and natrual ageing 96h
Form pack check and accept.
Aluminium alloy sheet tensile test at room temperature is surveyed using GB/T 16865-2013 in Examples 1 to 5 and comparative example 1~3
Method for testing, sampling direction is that plate is lateral, using the room-temperature mechanical property of Rm, Rp0.2, A% characterization alloy.It is detected using clearance gauge
Longitudinally, laterally unevenness, the nose height of plate.Determine according to GB/T3880-2012 standard determination mechanical property and plate shape
It is whether qualified.
Table one is the main technique system of 2024 aluminium alloy sheets in Examples 1 to 4 and comparative example 1~3, and table two is real
Apply the mechanical property of 2024 aluminium alloy sheets and plate shape situation in example 1~4 and comparative example 1~3.
Table one
Table two
As can be seen from Table I, box annealing and continuous annealing process control are applied with simultaneously in embodiment, and it is right
Box annealing process is not applied in ratio.
As can be seen from Table II, tensile strength (Rm) is between 420~441MPa in embodiment 1-5, yield strength
RP0.2 is between 278~304MPa, and elongation percentage (A%) is between 17~22%.By to embodiment 1-5 and comparative example 1-3 system
Standby aluminium alloy sheet compares discovery, and alloy strength and elongation percentage are attained by national standard.But with regard to surface quality, embodiment 1-
The aluminium alloy sheet of 5 preparations does not occur the defects of scratching, watermark, and reaching in corresponding embodiment realizes preferably surface matter
Amount.
It can be seen that can effectively be kept away when keeping T4 state property that can reach national standard using method of the invention
The surface quality defect for exempting from 2024 aluminium alloy strips, significantly improves production yield rate.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention
Scope of the claims in.
Claims (6)
1. a kind of processing method of 2024 aluminium alloy sheet of T4 state, which comprises the following steps:
A, founding: ingredient is carried out according to 2024 aluminum alloy chemical compositions and its content range, and smelting casting obtains required casting
Ingot；
B, it homogenizes: the aluminium alloy cast ingot after founding is subjected to Homogenization Treatments in soaking pit, after homogenization heat treatment
Aluminium alloy cast ingot cuts end to end and mills aluminium alloy cast ingot surface scull layer；
C, ingot casting heats: the aluminium alloy cast ingot after homogenization heat treatment, which is placed in heating furnace, to be heated, with the heating of 30~60 DEG C/h
Speed is heated to 440~480 DEG C, comes out of the stove after keeping the temperature 2~18h；
D, hot rolling: aluminium alloy cast ingot hot rolling after coming out of the stove is coiled material, and coil thickness is 3.5~5mm, finishing temperature is 200~
330℃；
E, cold rolling: being rolled into cold rolling coil by 50~80% cold processing ratio for the coiled material after hot rolling, cold rolling coil with a thickness of 1~
2mm, wherein cold processing ratio=(hot rolled coil thickness-cold rolling coil thickness)/hot rolled coil thickness * 100%；
F, stretch-bending straightening: cold rolling coil is stretched on withdrawal straightening machine, be bent it is orthopedic, elongation percentage be 0.6%~1.0%, stretch bending
Aluminum alloy coiled materials after aligning carry out cleaning oil removing；
G, box annealing: aluminum alloy coiled materials after stretch-bending straightening place box-annealing furnace and anneal, and annealing temperature is 350~
410 DEG C, soaking time is 1~4h, cooling velocity≤30 DEG C/h, tapping temperature≤260 DEG C；
H, continuous annealing: carrying out solution treatment in air-cushion type glowing furnace for the aluminum alloy coiled materials after box annealing, solution treatment
Temperature is 495~505 DEG C, and the time is 180s~300s, is quenched in a manner of water cooling after solid solution；
I, finishing: the aluminum alloy coiled materials after solution hardening are subjected to finishing processing, with the shape of thin plate after crosscutting and natrual ageing 96h
Formula packaging is checked and accepted.
2. the processing method of 2024 aluminium alloy sheet of T4 state as described in claim 1, which is characterized in that 2024 aluminium close in step A
Gold is according to following mass percent ingredient: Si :≤0.25%, Fe :≤0.35%, Cu:4.55~4.65%, Mn:0.5~
0.7%, Mg:1.55~1.65%, Cr:0.1%, Zn:0.2%, Ti :≤0.12%, impurity: single≤0.05%, total amount≤
0.15%, surplus Al.
3. the processing method of 2024 aluminium alloy sheet of T4 state as claimed in claim 2, which is characterized in that step A is using semicontinuous
Liquid aluminium alloy founding is aluminium alloy cast ingot by water cooling casting mode.
4. the processing method of 2024 aluminium alloy sheet of T4 state as claimed in claim 3, which is characterized in that step A will be prepared
It is liquid aluminium alloy that aluminium alloy stock, which is added in smelting furnace melting after evenly mixing, by standing, refines, skims, removes online
It is aluminium alloy cast ingot by liquid aluminium alloy founding after gas, filter progress.
5. the processing method of 2024 aluminium alloy sheet of T4 state as claimed in claim 4, which is characterized in that in step B at homogenization
The temperature of reason is 495 ± 5 DEG C, and soaking time is 22~25h, the aluminium alloy cast ingot strong wind cooling after coming out of the stove to room temperature.
6. the processing method of 2024 aluminium alloy sheet of T4 state as claimed in claim 5, which is characterized in that step D come out of the stove after aluminium
Prior to 450 DEG C hot roughing of alloy cast ingot are to 35mm, subsequent hot finishing to 3.5~5mm.
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| CN110952011A (en) * | 2019-11-22 | 2020-04-03 | 天津忠旺铝业有限公司 | 2-series high-damage-tolerance aluminum alloy plate and preparation method thereof |
| CN111690887A (en) * | 2020-06-28 | 2020-09-22 | 山东南山铝业股份有限公司 | Preparation method for preparing 2-series aluminum alloy annealed fine-grain thin plate |
| CN111702009A (en) * | 2020-06-28 | 2020-09-25 | 山东南山铝业股份有限公司 | Preparation method of T4 or T42-state 2024 aluminum alloy coated aluminum sheet |
| CN112522649A (en) * | 2020-12-03 | 2021-03-19 | 东北轻合金有限责任公司 | Manufacturing method of high-strength high-toughness large-size aluminum alloy plate for large passenger plane |
| CN113523722A (en) * | 2021-07-15 | 2021-10-22 | 东北轻合金有限责任公司 | Manufacturing method of aluminum alloy structural member for air cushion furnace production vehicle |
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| CN113523722A (en) * | 2021-07-15 | 2021-10-22 | 东北轻合金有限责任公司 | Manufacturing method of aluminum alloy structural member for air cushion furnace production vehicle |
| CN113996655A (en) * | 2021-08-19 | 2022-02-01 | 山东南山铝业股份有限公司 | Preparation method of 7075 aluminum alloy clad skin sheet for T6-state aviation |
| CN115948668A (en) * | 2022-12-27 | 2023-04-11 | 东北轻合金有限责任公司 | Manufacturing method of high-strength heat-treatment strengthenable aluminum alloy plate quenched in air cushion furnace |
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