CN114309120A - Preparation method of aluminum strip for high-frequency welded pipe - Google Patents
Preparation method of aluminum strip for high-frequency welded pipe Download PDFInfo
- Publication number
- CN114309120A CN114309120A CN202111680432.8A CN202111680432A CN114309120A CN 114309120 A CN114309120 A CN 114309120A CN 202111680432 A CN202111680432 A CN 202111680432A CN 114309120 A CN114309120 A CN 114309120A
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- aluminum strip
- cold rolling
- annealing
- welded pipe
- frequency welded
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000005097 cold rolling Methods 0.000 claims abstract description 71
- 238000000137 annealing Methods 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 56
- 238000003801 milling Methods 0.000 claims abstract description 22
- 238000003723 Smelting Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000005098 hot rolling Methods 0.000 claims abstract description 11
- 238000005266 casting Methods 0.000 claims abstract description 8
- 238000004806 packaging method and process Methods 0.000 claims abstract description 8
- 238000010008 shearing Methods 0.000 claims abstract description 8
- 239000010731 rolling oil Substances 0.000 claims description 35
- 239000007789 gas Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 15
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 9
- 238000004321 preservation Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention provides a preparation method of an aluminum strip for a high-frequency welded pipe, which comprises the following process steps of smelting, casting, surface milling, surface homogenizing, heating, hot rolling, primary cold rolling, intermediate annealing, secondary cold rolling, finished product annealing, shearing, detecting, packaging and warehousing, so that the prepared aluminum strip serving as a raw material has good self-strength and stability, sufficient corrosion resistance and wear resistance, improved manufacturing and mounting precision, prolonged service life and enlarged application range; through the two cold rolling processes, the stability of the performance of the aluminum strip can be ensured while the aluminum strip is formed to the required thickness, and the performance damage to the aluminum strip possibly caused in the rapid process of one cold rolling is avoided; through twice annealing processes before and after, annealing can be realized after each cold rolling, and the aluminum strip can be ensured to have enough processing and forming performance while the corresponding cold rolling effect is stabilized and consolidated.
Description
Technical Field
The invention relates to the technical field of aluminum strip forming processes, in particular to a preparation method of an aluminum strip for a high-frequency welded pipe.
Background
Aluminum alloys have been widely used in various industries because of their excellent properties. In the prior art, due to various requirements in welding and forming processes, the aluminum strip for the high-frequency welded pipe needs to have good strength and stability as well as sufficient corrosion resistance and wear resistance as raw materials, and in addition, the aluminum strip needs to have sufficient precision and formability in order to avoid manufacturing and mounting errors possibly generated in the forming process, but the aluminum strip as the raw material in the prior art is far from meeting the requirements.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a preparation method of an aluminum strip for a high-frequency welded pipe, which is characterized by comprising the following steps: comprises the following steps
1) Smelting: selecting the alloy types of the preparation raw materials according to preset alloy elements and corresponding proportions, and preparing the raw materials with the corresponding proportions for smelting;
2) casting: casting and molding the prepared raw materials into a cast-rolled coil;
3) milling a surface: carrying out surface milling treatment on the surface of the cast-rolled coil by using a milling cutter;
4) fire equalizing: sending the cast-rolled coil into a heat preservation device, keeping the heat preservation temperature at 520-530 ℃, the heat preservation time at 24-48 hours, and the tapping temperature at 520-525 ℃;
5) heating: the heating time is within the fixed temperature range of 530 ℃ and 550 ℃, the heating time is 12-24h, and the heating speed is 2-2.5 ℃/h;
6) hot rolling: carrying out hot rolling treatment on the aluminum strip at the hot rolling deformation of 45-85% and the temperature of 260-280 ℃ to obtain a material with the thickness of 10-12 mm;
7) primary cold rolling: carrying out primary cold rolling treatment on the hot rolled material, and continuously spraying rolling oil in the primary cold rolling process to realize lubrication, cooling and cleaning of the surface of the aluminum strip: the thickness of the aluminum strip is cold-rolled from 10-12mm to 5-8mm after the first cold rolling;
8) intermediate annealing: sending the cold-rolled material into an annealing environment for intermediate annealing, and introducing protective gas into the annealing environment;
9) secondary cold rolling: continuously carrying out secondary cold rolling treatment on the cold-rolled material, and continuously spraying rolling oil in the secondary cold rolling process to realize the lubrication, cooling and cleaning of the surface of the aluminum strip: the thickness of the aluminum strip after the secondary cold rolling is reduced from 5mm to 8mm to 0.1 mm to 0.5 mm;
10) annealing of a finished product: sending the cold-rolled material into an annealing environment again for finished product annealing, and introducing protective gas into the annealing environment;
11) shearing: shearing the finished product annealed aluminum strip at a fixed length;
12) and (3) detection: detecting the external appearance and the internal components of each section of aluminum strip;
13) packaging and warehousing: and packaging the aluminum strips qualified by detection, and then sending the aluminum strips into a warehouse for storage.
In a further preferred embodiment of the present invention, in step 1), a sampling test is performed on the mixture formed after smelting, and if and only if the corresponding mixture ratio of each alloying element falls within a preset range, the smelting is determined to be qualified.
As a further preferred embodiment of the present invention, in the step 3), the upper and lower surfaces of the cast-rolled coil are respectively milled, and after milling, the milled surfaces are detected by a visual camera, and when no obvious holes, gaps, cracks, or concave-convex points exist on the detected surface of the cast-rolled coil, the milled surfaces are determined to be completed.
As a further preferred embodiment of the present invention, the injection flow rate of the rolling oil in the secondary cold rolling process is smaller than that in the primary cold rolling process.
As a further preferred embodiment of the present invention, the injection pressure of the rolling oil in the secondary cold rolling process is smaller than that in the primary cold rolling process.
As a further preferred embodiment of the present invention, the same or different rolling oil is selected for the rolling oil sprayed in the secondary cold rolling process and the rolling oil sprayed in the primary cold rolling process.
In a further preferred embodiment of the present invention, a rolling oil recovery device and a purification device are further provided in each of the primary cold rolling process and the secondary cold rolling process.
As a further preferred embodiment of the present invention, the annealing environment of the intermediate annealing and the annealing environment of the final annealing are different annealing environments.
In a further preferred embodiment of the present invention, the same or different protective gas is introduced into the annealing environment for intermediate annealing and the annealing environment for final annealing.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides a preparation method of an aluminum strip for a high-frequency welded pipe, which comprises the following process steps of smelting, casting, surface milling, surface homogenizing, heating, hot rolling, primary cold rolling, intermediate annealing, secondary cold rolling, finished product annealing, shearing, detecting, packaging and warehousing, so that the prepared aluminum strip serving as a raw material has good self-strength and stability, sufficient corrosion resistance and wear resistance, manufacturing and mounting accuracy is improved, the service life is prolonged, and the application range is enlarged.
(2) The invention provides a preparation method of an aluminum strip for a high-frequency welded pipe, which can ensure the stability of the performance of the aluminum strip while the aluminum strip is formed into the required thickness through two cold rolling processes, and avoid the possible performance damage to the aluminum strip in the rapid process of one cold rolling.
(3) The invention provides a preparation method of an aluminum strip for a high-frequency welded pipe, which is characterized in that annealing is realized after cold rolling each time through two annealing processes, so that the aluminum strip can be stably and firmly processed and formed while enough processing and forming performance is ensured.
Drawings
FIG. 1 is a flow chart of the steps of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
[ example 1 ]
The embodiment 1 of the invention provides a preparation method of an aluminum strip for a high-frequency welded pipe, which comprises the following steps
1) Smelting: selecting the alloy types of the preparation raw materials according to preset alloy elements and corresponding proportions, and preparing the raw materials with the corresponding proportions for smelting; after the step, sampling detection is carried out on the mixture formed after smelting, and smelting is qualified if and only if the corresponding mixture ratio of each alloy element falls into a preset range; when the corresponding proportion of each alloy element exceeds a preset range, determining that the smelting is unqualified, correspondingly recording the corresponding proportion and the exceeding range of each smelting unqualified and compiling into a table so as to facilitate later observation and statistics, and further ensuring the stable operation of the subsequent process through sampling detection after smelting;
2) casting: casting and molding the prepared raw materials into a cast-rolled coil;
3) milling a surface: carrying out surface milling treatment on the surface of the cast-rolled coil by using a milling cutter; in the step, the upper and lower side surfaces of the cast-rolled coil are respectively milled, the milling is detected by a visual camera after the milling is finished, and the milling is determined to be finished when the detected surface of the cast-rolled coil has no obvious holes, gaps, cracks or concave-convex points; the whole flatness and smoothness of the surface of the aluminum strip are further ensured, and preferably, the vision camera and the milling cutter can be arranged together to move synchronously so as to ensure the synchronism and timeliness of observation, or the vision camera is used for detecting after the milling cutter finishes milling a certain length, so that the influence of fragments and vibration in the surface milling process on the vision camera is reduced; preferably, when the vision camera and the milling cutter are arranged to move synchronously, a corresponding protective cover or protective shell can be arranged for the vision camera, so that the influence of debris and vibration in the face milling process on the vision camera is reduced, and the vision camera is protected;
4) fire equalizing: sending the cast-rolled coil into a heat preservation device, keeping the heat preservation temperature at 520-530 ℃, the heat preservation time at 24-48 hours, and the tapping temperature at 520-525 ℃;
5) heating: the heating time is within the fixed temperature range of 530 ℃ and 550 ℃, the heating time is 12-24h, and the heating speed is 2-2.5 ℃/h;
6) hot rolling: carrying out hot rolling treatment on the aluminum strip at the hot rolling deformation of 45-85% and the temperature of 260-280 ℃ to obtain a material with the thickness of 10-12 mm;
7) primary cold rolling: carrying out primary cold rolling treatment on the hot rolled material, and continuously spraying rolling oil in the primary cold rolling process to realize lubrication, cooling and cleaning of the surface of the aluminum strip: the thickness of the aluminum strip is cold-rolled from 10-12mm to 5-8mm after the first cold rolling;
8) intermediate annealing: sending the cold-rolled material into an annealing environment for intermediate annealing, and introducing protective gas into the annealing environment;
9) secondary cold rolling: continuously carrying out secondary cold rolling treatment on the cold-rolled material, and continuously spraying rolling oil in the secondary cold rolling process to realize the lubrication, cooling and cleaning of the surface of the aluminum strip: the thickness of the aluminum strip after the secondary cold rolling is reduced from 5mm to 8mm to 0.1 mm to 0.5 mm; in this embodiment, preferably, the injection flow rate of the rolling oil in the secondary cold rolling process is smaller than that of the rolling oil in the primary cold rolling process, because the thickness deformation precision of the aluminum strip in the secondary cold rolling process is higher and the deformation is smaller, and an excessively high injection flow rate affects the forming performance of the aluminum strip after cold rolling on one hand and also affects the thickness control of the aluminum strip after the secondary cold rolling on the other hand; correspondingly, the injection pressure of the rolling oil in the secondary cold rolling process is preferably set to be smaller than that of the rolling oil in the primary cold rolling process, so that the influence on the secondary cold rolling process is further reduced; in addition, as further optimization, the same or different rolling oil is selected from the rolling oil sprayed in the secondary cold rolling process and the rolling oil sprayed in the primary cold rolling process, and the setting is the same, so that the complexity of the process can be reduced; when the cold rolling process is different from the primary cold rolling process, the primary cold rolling process and the secondary cold rolling process can be effectively distinguished to avoid confusion; in the present embodiment, the different rolling oils include different kinds of rolling oils and different concentrations of rolling oils; in order to avoid the waste of rolling oil, a rolling oil recovery device and a purification device are respectively arranged in the primary cold rolling process and the secondary cold rolling process to realize the recovery and the reutilization of the rolling oil, and correspondingly, different rolling oil recovery devices and different purification devices are required to be arranged when different rolling oils are selected.
10) Annealing of a finished product: sending the cold-rolled material into an annealing environment again for finished product annealing, and introducing protective gas into the annealing environment; in the embodiment, different annealing environments are respectively selected for the annealing environment of intermediate annealing and the annealing environment of finished product annealing, so that the method has the advantages that the production line continuous production can be realized, and the time consumption caused by the change of parameters such as the temperature of a single annealing environment is avoided; in addition, the same or different protective gases are respectively introduced into the annealing environment of the intermediate annealing and the annealing environment of the finished product annealing; when the same protective gas is selected, the process steps are simplified, the protective gas is convenient to obtain, when different protective gases are selected, the working procedures are effectively distinguished, and once parameter errors occur, the rapid and effective distinguishing can be realized through sampling, collecting and detecting the protective gas in each working procedure; similarly, in this embodiment, the different shielding gases include different types of shielding gases and different concentrations of shielding gases.
11) Shearing: shearing the finished product annealed aluminum strip at a fixed length;
12) and (3) detection: detecting the external appearance and the internal components of each section of aluminum strip;
13) packaging and warehousing: and packaging the aluminum strips qualified by detection, and then sending the aluminum strips into a warehouse for storage.
The aluminum strip for the high-frequency welding pipe prepared by the embodiment has good self-strength and stability, and meanwhile, has enough corrosion resistance and abrasion resistance, and meanwhile, the manufacturing and mounting precision of the aluminum strip is improved, the service life of the aluminum strip is prolonged, and the application range of the aluminum strip is enlarged; through the two cold rolling processes, the stability of the performance of the aluminum strip can be ensured while the aluminum strip is formed to the required thickness, and the performance damage to the aluminum strip possibly caused in the rapid process of one cold rolling is avoided; through twice annealing processes before and after, annealing can be realized after each cold rolling, and the aluminum strip can be ensured to have enough processing and forming performance while the corresponding cold rolling effect is stabilized and consolidated.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. A preparation method of an aluminum strip for a high-frequency welded pipe is characterized by comprising the following steps: comprises the following steps
1) Smelting: selecting the alloy types of the preparation raw materials according to preset alloy elements and corresponding proportions, and preparing the raw materials with the corresponding proportions for smelting;
2) casting: casting and molding the prepared raw materials into a cast-rolled coil;
3) milling a surface: carrying out surface milling treatment on the surface of the cast-rolled coil by using a milling cutter;
4) fire equalizing: sending the cast-rolled coil into a heat preservation device, keeping the heat preservation temperature at 520-530 ℃, the heat preservation time at 24-48 hours, and the tapping temperature at 520-525 ℃;
5) heating: the heating time is within the fixed temperature range of 530 ℃ and 550 ℃, the heating time is 12-24h, and the heating speed is 2-2.5 ℃/h;
6) hot rolling: carrying out hot rolling treatment on the aluminum strip at the hot rolling deformation of 45-85% and the temperature of 260-280 ℃ to obtain a material with the thickness of 10-12 mm;
7) primary cold rolling: carrying out primary cold rolling treatment on the hot rolled material, and continuously spraying rolling oil in the primary cold rolling process to realize lubrication, cooling and cleaning of the surface of the aluminum strip: the thickness of the aluminum strip is cold-rolled from 10-12mm to 5-8mm after the first cold rolling;
8) intermediate annealing: sending the cold-rolled material into an annealing environment for intermediate annealing, and introducing protective gas into the annealing environment;
9) secondary cold rolling: continuously carrying out secondary cold rolling treatment on the cold-rolled material, and continuously spraying rolling oil in the secondary cold rolling process to realize the lubrication, cooling and cleaning of the surface of the aluminum strip: the thickness of the aluminum strip after the secondary cold rolling is reduced from 5mm to 8mm to 0.1 mm to 0.5 mm;
10) annealing of a finished product: sending the cold-rolled material into an annealing environment again for finished product annealing, and introducing protective gas into the annealing environment;
11) shearing: shearing the finished product annealed aluminum strip at a fixed length;
12) and (3) detection: detecting the external appearance and the internal components of each section of aluminum strip;
13) packaging and warehousing: and packaging the aluminum strips qualified by detection, and then sending the aluminum strips into a warehouse for storage.
2. The method for producing an aluminum strip for a high-frequency welded pipe as claimed in claim 1, wherein: in the step 1), sampling detection is carried out on the mixture formed after smelting, and smelting is qualified if and only if the corresponding proportion of each alloy element falls within a preset range.
3. The method for producing an aluminum strip for a high-frequency welded pipe as claimed in claim 1, wherein: and 3) respectively milling the surfaces of the upper side and the lower side of the cast-rolled coil, detecting the milled surfaces by a visual camera, and determining that the milled surfaces are finished when the detected surface of the cast-rolled coil has no obvious holes, gaps, cracks or concave-convex points.
4. The method for producing an aluminum strip for a high-frequency welded pipe as claimed in claim 1, wherein: the jet flow of the rolling oil in the secondary cold rolling process is less than that of the rolling oil in the primary cold rolling process.
5. The method for producing an aluminum strip for a high-frequency welded pipe as claimed in claim 1, wherein: the injection pressure of the rolling oil in the secondary cold rolling process is smaller than that of the rolling oil in the primary cold rolling process.
6. The method for producing an aluminum strip for a high-frequency welded pipe as claimed in claim 1, wherein: the same or different rolling oil is selected from the rolling oil sprayed in the secondary cold rolling process and the rolling oil sprayed in the primary cold rolling process.
7. The method for producing an aluminum strip for a high-frequency welded pipe as claimed in claim 1, wherein: and a rolling oil recovery device and a purification device are respectively arranged in the primary cold rolling process and the secondary cold rolling process.
8. The method for producing an aluminum strip for a high-frequency welded pipe as claimed in claim 1, wherein: different annealing environments are respectively selected for the annealing environment of the intermediate annealing and the annealing environment of the finished product annealing.
9. The method for producing an aluminum strip for a high-frequency welded pipe as claimed in claim 1, wherein: and respectively introducing the same or different protective gases into the annealing environment of the intermediate annealing and the annealing environment of the finished product annealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111680432.8A CN114309120A (en) | 2021-12-31 | 2021-12-31 | Preparation method of aluminum strip for high-frequency welded pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111680432.8A CN114309120A (en) | 2021-12-31 | 2021-12-31 | Preparation method of aluminum strip for high-frequency welded pipe |
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| CN114309120A true CN114309120A (en) | 2022-04-12 |
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| CN113106288A (en) * | 2021-04-07 | 2021-07-13 | 太原晋西春雷铜业有限公司 | Method for preparing KFC (KFC) special-shaped strip blank with excellent softening resistance |
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2021
- 2021-12-31 CN CN202111680432.8A patent/CN114309120A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5976279A (en) * | 1997-06-04 | 1999-11-02 | Golden Aluminum Company | For heat treatable aluminum alloys and treatment process for making same |
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