CN110777309B - Method for eliminating unevenness of surface of alloy aluminum coil - Google Patents
Method for eliminating unevenness of surface of alloy aluminum coil Download PDFInfo
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- CN110777309B CN110777309B CN201911055585.6A CN201911055585A CN110777309B CN 110777309 B CN110777309 B CN 110777309B CN 201911055585 A CN201911055585 A CN 201911055585A CN 110777309 B CN110777309 B CN 110777309B
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000956 alloy Substances 0.000 title claims abstract description 21
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 18
- 238000000137 annealing Methods 0.000 claims abstract description 45
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 238000010926 purge Methods 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 abstract description 10
- 239000010731 rolling oil Substances 0.000 abstract description 8
- 230000009467 reduction Effects 0.000 abstract description 5
- 238000005507 spraying Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000005496 tempering Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 18
- 239000003921 oil Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000005030 aluminium foil Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
The invention relates to the technical field of aluminum coil preparation, and particularly discloses a method for eliminating unevenness of the surface of an alloy aluminum coil. Because the alloy aluminum is also subjected to tempering or annealing treatment for multiple times in the rolling process, aiming at the phenomenon of uneven surface of a coiled aluminum coil, the phenomenon of uneven surface of the aluminum coil is improved and eliminated by adjusting rolling reduction, components of rolling oil, a spraying system of the rolling oil, pressure adjustment and other measures in the industry, however, the phenomenon of uneven surface of the aluminum coil is not effectively improved and eliminated by the measures; according to the technical scheme, the coiled aluminum coil is placed into the annealing furnace again for annealing treatment, so that the phenomenon of unevenness of the surface of the aluminum coil can be effectively improved and eliminated.
Description
Technical Field
The invention relates to the technical field of aluminum coil preparation, in particular to a method for eliminating unevenness of the surface of an alloy aluminum coil.
Background
The 5052 alloy is an AL-Mg alloy, magnesium is a main alloy element in the 5052 alloy, and is antirust aluminum which is widely applied, the alloy has high strength, particularly has high fatigue resistance and high plasticity and corrosion resistance, and is commonly used for preparing aluminum plates or aluminum foils.
Because the 5052 alloy material has high strength and the tensile strength of the alloy material is generally required to be 320-380 MPa, in the process of preparing an aluminum coil, particularly an aluminum foil of about 0.06mm, after the alloy material is rolled to the thickness of a finished product of 0.06mm by adopting a normal rolling mode, the whole surface of the material has an uneven phenomenon, the uneven phenomenon on the surface is more serious along with the reduction of the thickness of the finished product, and the uneven phenomenon on the surface is still not improved and eliminated by adjusting rolling reduction, components of rolling oil, a spraying system of the rolling oil, pressure adjustment and other measures.
Disclosure of Invention
The invention provides a method for eliminating the surface unevenness of an alloy aluminum coil, which aims to solve the problem that the surface unevenness of the aluminum coil cannot be solved by adjusting rolling reduction, rolling oil components, a spraying system of rolling oil and the like in the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the method for eliminating the surface unevenness of the alloy aluminum coil comprises the step of placing the coiled aluminum coil into an annealing furnace for annealing treatment, wherein the annealing temperature is 140-160 ℃, the heating time is 6-10 hours, and the heat preservation time is 18-24 hours.
The technical principle and the effect of the technical scheme are as follows:
1. because the alloy aluminum is also subjected to tempering or annealing treatment for multiple times in the rolling process, aiming at the phenomenon of uneven surface of a coiled aluminum coil, the phenomenon of uneven surface of the aluminum coil is improved and eliminated by adjusting rolling reduction, components of rolling oil, a spraying system of the rolling oil, pressure adjustment and other measures in the industry, however, the phenomenon of uneven surface of the aluminum coil is not effectively improved and eliminated by the measures; the inventor finds that the rolled aluminum coil is placed into an annealing furnace again for annealing treatment in the groping process for solving the problem of the surface unevenness of the aluminum coil, and can effectively improve and eliminate the surface unevenness of the aluminum coil.
2. The annealing temperature in the scheme is lower to be 140-160 ℃, the aluminum coil can be prevented from softening in the annealing process at such a temperature, the heating time is 6-10 hours, namely, the heating rate in the annealing furnace is low, the problem that the aluminum coil is hot-rolled due to too high temperature is avoided, and the problem that the surface is concave and convex is aggravated, the heat preservation time in the scheme is 18-24 hours, and under the condition of long-time heat preservation, the internal tensile stress of the aluminum coil in the rolling and coiling processes can be effectively released, so that the concave and convex phenomenon on the surface of the aluminum coil is improved and eliminated.
And further, taking the aluminum coil out of the annealing furnace after the annealing is finished and cooling the aluminum coil in an air cooling mode.
Has the advantages that: compared with furnace cooling, the air cooling mode has the advantages that the air cooling time is short, the production time is shortened, and meanwhile, the strength of the aluminum coil can be improved.
Further, the annealing temperature is 150-155 ℃.
Has the advantages that: production tests prove that the qualified rate of the aluminum coil is higher at the annealing temperature.
Further, the heating time in the annealing treatment is 8-9 h.
Has the advantages that: production tests prove that the qualified rate of the aluminum coil is higher under the annealing heating time.
Further, in the annealing treatment, the heat preservation time is 20-22 h.
Has the advantages that: production tests prove that the qualified rate of the aluminum coil is higher under the annealing heat-preservation time.
Further, the annealing furnace comprises a furnace body, a blow and wash fan, a negative pressure fan and a resistance heater, an air outlet pipe is laid at the bottom of the furnace body, an air suction pipe is laid on the side wall of the furnace body, the resistance heater is communicated with the blow and wash fan and the air outlet pipe, and the negative pressure fan is communicated with the air suction pipe and the blow and wash fan.
Has the advantages that: therefore, after the negative pressure fan extracts hot air in the furnace body, the hot air is sent into the resistance heater through the purging fan, so that the energy consumption is reduced, the heating time required by the resistance heater is shortened, and the energy conservation is realized.
Further, an oil stain filtering component is arranged in the negative pressure fan.
Has the advantages that: because the surface of the aluminum coil still has certain oil stain after the aluminum coil is rolled and coiled, the oil stain filtering component is arranged in the negative pressure fan, and hot air containing the oil stain can be prevented from being sent into the annealing furnace again.
Furthermore, a plurality of air suction holes are formed in the side wall of the air suction pipe, and the opening of each air suction hole faces the inside of the furnace body.
Has the advantages that: the arrangement of the plurality of air suction holes can ensure that the negative pressure in the furnace body is relatively balanced, thereby being beneficial to the annealing of the aluminum coil.
Further, the air outlet pipe is provided with a plurality of air outlet holes, the air outlet pipes are arranged at intervals, a seat body for placing an aluminum foil roll is arranged between the air outlet pipes, and the air outlet pipes are provided with a plurality of air outlet holes.
Has the advantages that: the arrangement of the air outlet holes enables the temperature in the furnace body to rise relatively uniformly, and heat treatment of the aluminum coil is facilitated.
Furthermore, the distance between the seat body and the bottom wall of the furnace body is greater than the distance between the air outlet pipe and the bottom wall of the furnace body, and each air outlet hole faces the side wall of the furnace body.
Has the advantages that: set up like this and make and can not direct action impact the aluminium foil from exhaust hot-air current of exhaust vent and roll up, reduce hot-air current and act on the power that the aluminium foil was rolled up to prevent that the aluminium from rolling up the impact of heated air current aggravates the condition of surperficial unevenness.
Drawings
FIG. 1 is a cross-sectional view of an outlet duct in an annealing furnace used in an embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: an air outlet pipe 10, a vertical shaft 11, a buffer plate 12 and an air outlet 13.
The parameters of examples 1-5 are shown in Table 1 below:
table 1 shows the parameters of one method for eliminating the surface unevenness of an aluminum alloy coil in examples 1 to 5
The following describes a method for removing the surface unevenness of an aluminum alloy coil in detail by taking example 1 as an example:
and (3) putting the coiled aluminum coil into an annealing furnace for annealing treatment, wherein the annealing temperature is 140 ℃, the heating time is 6h (namely 6h is shared when the aluminum coil is heated from the room temperature to 140 ℃), the heat preservation time is 18h, opening the annealing furnace after the annealing is finished, taking out the aluminum coil, and naturally cooling the aluminum coil at the room temperature.
The annealing furnace used in embodiments 1 to 5 includes a furnace body, a purge fan, a negative pressure fan and a resistance heater, wherein the purge fan, the negative pressure fan, the resistance heater and the heat exchanger are located outside the furnace body, an air outlet pipe 10 is laid at the bottom of the furnace body, a plurality of air suction pipes are laid on the side wall and the top of the furnace body, a plurality of air suction holes are opened on the air suction pipes, the openings of the air suction holes face the inside of the furnace body, the purge fan includes an air inlet and an air outlet, the negative pressure fan includes a negative pressure inlet and a negative pressure outlet, an oil stain filtering assembly is further provided in the negative pressure fan, the resistance heater includes an air inlet and an air outlet, wherein the negative pressure inlet of the negative pressure fan is communicated with the air suction pipes through a heat-resistant pipe, the negative pressure outlet of the negative pressure fan is communicated with the air inlet of, and the air outlet of the resistance heater is communicated with the air outlet pipe through a pipeline.
The air outlet pipe 10 is provided with a plurality of air outlet pipes, the air outlet pipes are paved in the furnace body at intervals, a seat body for placing an aluminum coil is arranged between the air outlet pipes 10, the distance between the seat body and the bottom wall of the furnace body is greater than the distance between the air outlet pipes and the bottom wall of the furnace body, a plurality of air outlet holes 13 are formed in the air outlet pipe 10, each air outlet hole faces towards the side wall of the furnace body, and when annealing is carried out, the aluminum coil is placed in parallel to the.
Be equipped with a plurality of buffer structure along its axial interval in air-out pipe 10, it is shown in combination figure 1 that buffer structure is including rotating the vertical axis 11 of connection in air-out pipe, and the equipartition has polylith buffer board 12 on the vertical axis, and it has the active carbon adsorption layer to bond on the buffer board.
And during annealing, the purging fan and the negative pressure fan are opened, so that the negative pressure fan, the purging fan, the resistance heater and the furnace body form an airflow circulation loop, and hot air adsorbed by the negative pressure fan is fed into the purging fan again, so that the energy consumption can be reduced. Meanwhile, hot air discharged from the resistance heater enters the air outlet pipe, the hot air is blocked by the buffer structure, the air speed is reduced, and meanwhile, oil dirt remaining in the hot air is adsorbed by the activated carbon, so that hot air entering the furnace body is relatively clean, and in addition, the hot air enters the furnace body at a low speed, and the phenomenon that large wind power directly acts on the aluminum coil is prevented.
A further 4 sets of comparative examples to examples 1 to 5 were set up:
table 2 shows the parameters of comparative examples 1 to 3
Comparative examples 1 to 3 differ from example 1 only in the parameters shown in table 2, while comparative example 4 differs from example 1 in that the annealed aluminum coil was furnace-cooled to normal temperature before being taken out of the annealing furnace.
The yield of 100 aluminum coils treated by the production processes of examples 1 to 5 and comparative examples 1 to 4 was obtained as shown in table 3 below, wherein qualified means that the surface of the aluminum coils was almost flat and had no unevenness, and unqualified means that the surface of the aluminum coils was remarkably uneven.
TABLE 3 percent of pass for the aluminum coil with smooth surface
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 |
| 99％ | 99％ | 100％ | 100％ | 99％ | 37％ | 65％ | 43％ | 93％ |
In combination with table 3 above, it can be seen that:
1. the percent of pass of the aluminum coil obtained by adopting the methods of the embodiments 1 to 5 is not less than 99 percent, which shows that the surface unevenness of the aluminum coil can be improved by reasonably annealing the coiled aluminum coil.
2. In addition, in the arranged comparative examples, the yield of the comparative example 1 and the comparative example 3 is low, and the problem is that the heating time in the comparative example 1 is short, namely the heating rate is high, so that the aluminum coil is easy to generate the situation of hot drum, and the situation of surface unevenness of the aluminum coil is increased, while in the comparative example 3, because the heat preservation time is too short, the internal tensile stress of the aluminum coil in the rolling and coiling processes can not be effectively released, and the surface unevenness of the aluminum coil can still not be effectively eliminated.
3. In addition, the yield of the comparative example 2 and the comparative example 4 is improved, but the annealing temperature in the comparative example 2 is too high, so that the aluminum coil is softened during annealing, the aluminum coil is difficult to eliminate the unevenness phenomenon under the condition of no external force, and in addition, the furnace cooling mode is adopted in the comparative example 4, the cooling time is long, and the structural strength of the aluminum coil cannot meet the requirement.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (9)
1. A method for eliminating the surface unevenness of an alloy aluminum coil is characterized by comprising the following steps: putting the coiled aluminum coil into an annealing furnace for annealing treatment, wherein the annealing temperature is 140-160 ℃, the heating time is 6-10 h, and the heat preservation time is 18-24 h; the annealing furnace comprises a furnace body, a purging fan, a negative pressure fan and a resistance heater, wherein an air outlet pipe is laid at the bottom of the furnace body, an air suction pipe is laid on the side wall of the furnace body, the resistance heater is communicated with the purging fan and the air outlet pipe, and the negative pressure fan is communicated with the air suction pipe and the purging fan; be equipped with a plurality of buffer structure along its axial interval in the air-out pipe, buffer structure is including rotating the vertical axis of connection in the air-out pipe, and the epaxial equipartition of vertical has the polylith buffer board, and it has the active carbon adsorption layer to bond on the buffer board.
2. The method for eliminating the surface unevenness of the alloy aluminum coil as claimed in claim 1, wherein: and taking the aluminum coil out of the annealing furnace after the annealing is finished and cooling the aluminum coil in an air cooling mode.
3. The method for eliminating the surface unevenness of the aluminum alloy coil as claimed in claim 2, wherein: the annealing temperature is 150-155 ℃.
4. The method for eliminating the surface unevenness of the aluminum alloy coil as claimed in claim 2, wherein: and the heating time in the annealing treatment is 8-9 h.
5. The method for eliminating the surface unevenness of the alloy aluminum coil as claimed in claim 1, wherein: and in the annealing treatment, the heat preservation time is 20-22 h.
6. The method for eliminating the surface unevenness of the alloy aluminum coil as claimed in claim 1, wherein: and an oil stain filtering component is arranged in the negative pressure fan.
7. The method for eliminating the surface unevenness of the alloy aluminum coil as claimed in claim 1, wherein: a plurality of air suction holes are formed in the side wall of the air suction pipe, and the opening of each air suction hole faces the inside of the furnace body.
8. The method for eliminating the surface unevenness of the alloy aluminum coil as claimed in claim 1, wherein: the air outlet pipe is provided with a plurality of air outlet holes, the air outlet pipes are arranged at intervals, a seat body for placing an aluminum foil roll is arranged between the air outlet pipes, and the air outlet pipes are provided with a plurality of air outlet holes.
9. The method for eliminating the surface unevenness of the aluminum alloy coil as claimed in claim 8, wherein: the distance between the seat body and the bottom wall of the furnace body is greater than the distance between the air outlet pipe and the bottom wall of the furnace body, and each air outlet hole faces to the side wall of the furnace body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911055585.6A CN110777309B (en) | 2019-10-31 | 2019-10-31 | Method for eliminating unevenness of surface of alloy aluminum coil |
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| CN201911055585.6A CN110777309B (en) | 2019-10-31 | 2019-10-31 | Method for eliminating unevenness of surface of alloy aluminum coil |
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| CN110777309B true CN110777309B (en) | 2020-11-06 |
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| CN113151756A (en) * | 2021-04-19 | 2021-07-23 | 广西柳州银海铝业股份有限公司 | Method for eliminating annealing wrinkling defect of cold-rolled aluminum coil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2239347A1 (en) * | 2008-02-06 | 2010-10-13 | Nippon Light Metal, Co. Ltd. | Aluminum alloy sheet for motor vehicle and process for producing the same |
| CN202359173U (en) * | 2011-12-01 | 2012-08-01 | 湖南晟通科技集团有限公司 | Heat preserving furnace of continues annealing furnace |
| CN109402460A (en) * | 2018-12-25 | 2019-03-01 | 江苏中基复合材料有限公司 | Alloying high-peeling strength high heat-sealing strength SP pack double-zero aluminum foil |
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- 2019-10-31 CN CN201911055585.6A patent/CN110777309B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2239347A1 (en) * | 2008-02-06 | 2010-10-13 | Nippon Light Metal, Co. Ltd. | Aluminum alloy sheet for motor vehicle and process for producing the same |
| CN202359173U (en) * | 2011-12-01 | 2012-08-01 | 湖南晟通科技集团有限公司 | Heat preserving furnace of continues annealing furnace |
| CN109402460A (en) * | 2018-12-25 | 2019-03-01 | 江苏中基复合材料有限公司 | Alloying high-peeling strength high heat-sealing strength SP pack double-zero aluminum foil |
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Effective date of registration: 20210112 Address after: 748100 xijiaoping, gongchang Town, Longxi County, Dingxi City, Gansu Province Patentee after: Longxi Northwest Aluminum Foil Co.,Ltd. Address before: 401326 Datang, Xipeng Town, Jiulongpo District, Chongqing Patentee before: CHONGQING ZHONGLYU HUAXI ALUMINIUM Co.,Ltd. |
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Address after: 748199 Gong Chang Zhen Xi Jiao Ping, Longxi County, Dingxi City, Gansu Province Patentee after: China Aluminum Foil (Longxi) Co.,Ltd. Country or region after: China Address before: 748100 xijiaoping, gongchang Town, Longxi County, Dingxi City, Gansu Province Patentee before: Longxi Northwest Aluminum Foil Co.,Ltd. Country or region before: China |