CN113122787A - Method for eliminating annealing wrinkle of aluminum alloy coil - Google Patents
Method for eliminating annealing wrinkle of aluminum alloy coil Download PDFInfo
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- CN113122787A CN113122787A CN202110419927.9A CN202110419927A CN113122787A CN 113122787 A CN113122787 A CN 113122787A CN 202110419927 A CN202110419927 A CN 202110419927A CN 113122787 A CN113122787 A CN 113122787A
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- aluminum alloy
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 81
- 238000000137 annealing Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000037303 wrinkles Effects 0.000 title description 2
- 238000005452 bending Methods 0.000 claims abstract description 28
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 abstract description 13
- 230000007547 defect Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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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
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
The invention discloses a method for eliminating annealing wrinkling of an aluminum alloy coil, and belongs to the technical field of aluminum alloy production. Before the aluminum alloy coil is completely annealed, the coiling tensile stress of the aluminum alloy coil is controlled to be less than or equal to 12 MPa; before complete annealing, the aluminum alloy roll passes through a stretch bending straightener, and the elongation of the stretch bending straightener is controlled to be more than or equal to 0.2 percent, and the rolling reduction of a bending roll is controlled to be more than or equal to 60 mm; when the annealing is completed, the temperature of furnace gas is raised to 400-500 ℃, and the temperature rise time is more than or equal to 6 hours; and when the temperature of the aluminum alloy coil is raised to the target temperature of complete annealing, preserving the heat, cooling the aluminum alloy coil to below 200 ℃ along with the furnace after preserving the heat, and discharging the aluminum alloy coil. The invention provides a method for eliminating annealing wrinkling of an aluminum alloy coil, which can solve the problem that wrinkling defects appear in the middle of the width direction of an inner ring of a coiled material after an aluminum alloy cold-rolled strip is annealed.
Description
Technical Field
The invention relates to the technical field of aluminum alloy production, in particular to a method for eliminating annealing wrinkling of an aluminum alloy coil in the production process of the aluminum alloy coil.
Background
In the production process of aluminum alloy, because the complete annealing can eliminate work hardening, the material is recovered to the original state to obtain an O state, the complete annealing is often carried out, and corresponding cold deformation is carried out after the complete annealing to obtain the corresponding state and performance.
However, in the actual production process, it is often found that after the aluminum alloy coil is completely annealed, irregular annealing wrinkling defects are generated in the middle of the strip at the position of 200 mm-300 mm of the inner diameter wall thickness of the coil, and the reason for the generation of the annealing wrinkling defects is as follows: the aluminum alloy strip is in the rolling process of a cold rolling mill, due to the fact that different local stresses are applied to the aluminum alloy strip, ductility of all parts of the strip is different, the strip becomes uneven due to the fact that deformation is not uniform, unevenness of the strip is not obvious under the effect of the tension of the rolling mill, when the strip is completely annealed, unevenness of the strip is completely shown after stress is eliminated, and due to the fact that the strip is tightly coiled on a sleeve, the uneven strip is extruded, and then wrinkling defects occur in the middle of the width direction of an inner ring of a coiled material. The strip cannot be eliminated by finishing equipment after being wrinkled, and the part with the annealing wrinkling defect needs to be cut off when the finished product is finished.
Disclosure of Invention
In order to solve the problems, the invention provides a method for eliminating annealing wrinkling of an aluminum alloy coil, which can solve the problem that wrinkling defects appear in the middle of the width direction of an inner ring of a coiled material after annealing of an aluminum alloy cold-rolled strip.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the method comprises the following steps:
A. before the complete annealing, the coiling tensile stress of the aluminum alloy coil is controlled to be less than or equal to 12 MPa;
B. before complete annealing, the aluminum alloy roll passes through a stretch bending straightener, and the elongation of the stretch bending straightener is controlled to be more than or equal to 0.2 percent, and the rolling reduction of a bending roll is controlled to be more than or equal to 60 mm;
C. when the annealing is completed, the temperature of furnace gas is raised to 400-500 ℃, and the temperature rise time is more than or equal to 6 hours;
D. and when the temperature of the aluminum alloy coil is raised to the target temperature of complete annealing, preserving the heat, cooling the aluminum alloy coil to below 200 ℃ along with the furnace after preserving the heat, and discharging the aluminum alloy coil.
In the above technical solution, a more specific technical solution may also be: and in the step A, the coiling tensile stress of the aluminum alloy roll is controlled to be 8-12 MPa.
Further, in the step B, the elongation of the stretch bending straightener is controlled to be 0.2-0.3%.
Further, in the step B, the reduction amount of the bending roll of the stretch bending leveler is controlled to 60mm to 80 mm.
Further, in the step C, the temperature rise time of the furnace gas is controlled to be 8-12 hours.
Further, the temperature of the aluminum alloy coil is reduced to 180-200 ℃ and the aluminum alloy coil is discharged.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts three steps before complete annealing and treatment after annealing to slowly release the stress of the aluminum alloy coil: before the complete annealing, the aluminum alloy coil is coiled by adopting small coiling tension, so that the interlayer gap of the aluminum alloy coil is increased, and the phenomenon that the uneven part of the strip material is extruded and deformed is avoided; before complete annealing, stretching the strip material by adopting tension with 0.2-0.3% of elongation rate on a stretch-bend straightener, bending the strip material by using a bending roller, wherein the strip material is subjected to the dual actions of stretching and bending, the strip material is stretched along a geometric central layer, and the central layer deviates towards the inner side of the bending, so that the uneven strip material becomes flat, the internal stress is uniformly distributed, the surface unevenness of the strip material is low due to the uniform distribution of the internal stress, and the extrusion deformation between the strip material layers is not easy to occur during annealing and temperature rising and falling; in addition, during temperature rising, the aluminum alloy roll slowly releases internal stress by adopting long-time slow temperature rising, and meanwhile, the temperature of each part of the aluminum alloy roll is close to that of each part of the aluminum alloy roll, and the stress release speed is consistent; when the aluminum alloy roll is heated and expanded, the unevenness of the strip is slowly recovered, and extrusion deformation between layers of the strip is avoided during recovery.
2. In the conventional operation, after the annealing is finished, the aluminum alloy coil is directly lifted out of the annealing furnace and cooled by a fan; and in the same way as the slow temperature rise, after the aluminum alloy coil is annealed, the aluminum alloy coil is cooled to below 200 ℃ along with the furnace and then discharged, so that the aluminum alloy coil can be slowly cooled and shrunk, and extrusion deformation between the layers of the strip material during recovery is avoided.
Drawings
Fig. 1 is a schematic illustration of the effect of producing an aluminum alloy coil without modifying the prior art annealing process for completely annealing the aluminum alloy coil.
FIG. 2 is a schematic view showing the effect of the aluminum alloy coil 1 after the treatment of example 1.
Fig. 3 is a schematic view showing the effect of the aluminum alloy roll 2 after the treatment of example 2.
FIG. 4 is a schematic view showing the effect of treating aluminum alloy coil 3 according to example 3.
Detailed Description
The present invention is further described in detail below with reference to examples;
the first embodiment is as follows:
the method is adopted to treat the aluminum alloy roll 1, the alloy 1060 (the alloy belongs to 1XXX series aluminum alloy), the thickness of a finished product is 0.5mm, the width is 1280mm, and the roll diameter is 2000mm, and the method comprises the following steps:
A. before the complete annealing, the coiling tensile stress of the aluminum alloy coil is controlled to be 8 MPa;
B. before complete annealing, the aluminum alloy coil passes through a stretch bending straightener, the elongation of the stretch bending straightener is 0.2%, and the rolling reduction of a bending roll is 60 mm;
C. after the heat preservation is finished, the temperature of furnace gas is raised to 500 ℃, and the temperature raising time is 8 hours;
D. and raising the temperature of the metal to the target temperature of complete annealing, preserving the heat, cooling the metal to below 200 ℃ along with the furnace, and discharging the metal.
Example two:
the method is adopted to treat the aluminum alloy coil 2, alloy 3005 (the alloy belongs to 3XXX series aluminum alloy), the thickness of a finished product is 0.4mm, the width is 1800mm, and the coil diameter is 2500mm, and the method comprises the following steps:
A. before the complete annealing, the coiling tensile stress of the aluminum alloy coil is controlled to be 10 MPa;
B. before complete annealing, the aluminum alloy coil passes through a stretch bending straightener, the elongation of the stretch bending straightener is 0.25%, and the rolling reduction of a bending roll is 70 mm;
C. after the heat preservation is finished, the temperature of furnace gas is raised to 450 ℃, and the temperature raising time is 12 hours;
D. and raising the temperature of the metal to the target temperature of complete annealing, preserving the heat, cooling the metal to below 200 ℃ along with the furnace, and discharging the metal.
Example three:
the method is adopted to process an aluminum alloy roll 3, namely alloy 5052 (the alloy belongs to 5XXX series aluminum alloy), the thickness of a finished product is 0.4mm, the width is 1800mm, and the roll diameter is 2500mm, and the method comprises the following steps:
A. before the complete annealing, the coiling tensile stress of the aluminum alloy coil is controlled to be 12 MPa;
B. before complete annealing, the aluminum alloy coil passes through a stretch bending straightener, the elongation of the stretch bending straightener is 0.3%, and the rolling reduction of a bending roll is 80 mm;
C. after the heat preservation is finished, the temperature of furnace gas is raised to 400 ℃, and the temperature raising time is 10 hours;
D. and raising the temperature of the metal to the target temperature of complete annealing, preserving the heat, cooling the metal to below 180 ℃ along with the furnace, and discharging the metal.
Referring to fig. 1-4, fig. 1 is a schematic illustration of the effects of an aluminum alloy roll produced without modification to the prior art annealing process; FIG. 2 is a schematic view showing the effect of aluminum alloy roll 1 after treatment in example 1 (i.e., after the prior aluminum alloy roll is completely annealed and modified according to the present invention); FIG. 3 is a schematic representation of the effect of aluminum alloy roll 2 after treatment in example 2 (i.e., after the prior art aluminum alloy roll has been completely annealed in accordance with the present invention); fig. 4 is a schematic diagram of the aluminum alloy roll 3 after being processed in example 3 (i.e., after the original aluminum alloy roll is completely annealed and modified according to the present invention).
Through the above embodiments 1-3 and fig. 1-4, it can be seen that if only the aluminum alloy roll produced by the existing aluminum alloy roll complete annealing process is adopted, irregular annealing wrinkling defects are usually generated; by adopting the technical scheme of the invention, the defect of annealing and wrinkling of the aluminum alloy coil can be effectively eliminated.
While the method for eliminating the annealing wrinkling defect of the aluminum alloy coil provided by the present invention has been described in detail, those skilled in the art will appreciate that the scope of the present invention is not limited to the above description.
Claims (6)
1. The method for eliminating the annealing wrinkling of the aluminum alloy coil is characterized by comprising the following steps of:
A. before the complete annealing, the coiling tensile stress of the aluminum alloy coil is controlled to be less than or equal to 12 MPa;
B. before complete annealing, the aluminum alloy roll passes through a stretch bending straightener, and the elongation of the stretch bending straightener is controlled to be more than or equal to 0.2 percent, and the rolling reduction of a bending roll is controlled to be more than or equal to 60 mm;
C. when the annealing is completed, the temperature of furnace gas is raised to 400-500 ℃, and the temperature rise time is more than or equal to 6 hours;
D. and when the temperature of the aluminum alloy coil is raised to the target temperature of complete annealing, preserving the heat, cooling the aluminum alloy coil to below 200 ℃ along with the furnace after preserving the heat, and discharging the aluminum alloy coil.
2. The method for eliminating annealing wrinkling of aluminum alloy rolls according to claim 1, wherein: and in the step A, the coiling tensile stress of the aluminum alloy roll is controlled to be 8-12 MPa.
3. The method for eliminating annealing wrinkling of aluminum alloy rolls according to claim 1 or 2, wherein: in the step B, the elongation of the stretch bending straightener is controlled to be 0.2-0.3%.
4. The method for eliminating annealing wrinkling of aluminum alloy rolls according to claim 3, wherein: in the step B, the rolling reduction of the bending roller of the stretch bending straightener is controlled to be 60-80 mm.
5. The method for eliminating annealing wrinkling of aluminum alloy rolls according to claim 4, wherein: in the step C, the temperature rise time of the furnace gas is controlled to be 8-12 hours.
6. The method for eliminating annealing wrinkling of aluminum alloy rolls according to claim 5, wherein: and D, cooling the aluminum alloy coil to 180-200 ℃ and discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110419927.9A CN113122787A (en) | 2021-04-19 | 2021-04-19 | Method for eliminating annealing wrinkle of aluminum alloy coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110419927.9A CN113122787A (en) | 2021-04-19 | 2021-04-19 | Method for eliminating annealing wrinkle of aluminum alloy coil |
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| CN113122787A true CN113122787A (en) | 2021-07-16 |
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| CN202110419927.9A Pending CN113122787A (en) | 2021-04-19 | 2021-04-19 | Method for eliminating annealing wrinkle of aluminum alloy coil |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4134283A (en) * | 1976-02-13 | 1979-01-16 | Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh | Strip-processing lines with cold-rolling stands |
| US20160083818A1 (en) * | 2013-04-19 | 2016-03-24 | General Research Institute For Nonferrous Metals | Aluminum alloy materials suitable for the manufacture of automotive body panels and methods for producing the same |
| CN106424134A (en) * | 2016-10-10 | 2017-02-22 | 广西南南铝加工有限公司 | Efficient production method of aluminum alloy cold-rolled coiled material |
| CN109487131A (en) * | 2018-11-16 | 2019-03-19 | 广西柳州银海铝业股份有限公司 | 5052 alloy door-plate aluminum alloy base material production methods |
| CN112359301A (en) * | 2020-10-20 | 2021-02-12 | 无锡市铝泰新材料股份有限公司 | Annealing process of aluminum foil |
-
2021
- 2021-04-19 CN CN202110419927.9A patent/CN113122787A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4134283A (en) * | 1976-02-13 | 1979-01-16 | Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh | Strip-processing lines with cold-rolling stands |
| US20160083818A1 (en) * | 2013-04-19 | 2016-03-24 | General Research Institute For Nonferrous Metals | Aluminum alloy materials suitable for the manufacture of automotive body panels and methods for producing the same |
| CN106424134A (en) * | 2016-10-10 | 2017-02-22 | 广西南南铝加工有限公司 | Efficient production method of aluminum alloy cold-rolled coiled material |
| CN109487131A (en) * | 2018-11-16 | 2019-03-19 | 广西柳州银海铝业股份有限公司 | 5052 alloy door-plate aluminum alloy base material production methods |
| CN112359301A (en) * | 2020-10-20 | 2021-02-12 | 无锡市铝泰新材料股份有限公司 | Annealing process of aluminum foil |
Non-Patent Citations (2)
| Title |
|---|
| 李晓龙: ""铸轧坯料轧制幅宽≥1300mm 的双零箔生产工艺研究"", 《铝加工》 * |
| 李虎兴 等: "《冷轧窄带钢生产》", 30 June 1995 * |
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Application publication date: 20210716 |