CN111534729A - Control method for transverse unevenness of high-strength aluminum alloy plate - Google Patents
Control method for transverse unevenness of high-strength aluminum alloy plate Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 24
- 238000010791 quenching Methods 0.000 claims abstract description 33
- 230000000171 quenching effect Effects 0.000 claims abstract description 33
- 238000001816 cooling Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 239000000956 alloy Substances 0.000 claims description 16
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 229910052749 magnesium Inorganic materials 0.000 claims description 9
- 239000011777 magnesium Substances 0.000 claims description 9
- 229910052725 zinc Inorganic materials 0.000 claims description 9
- 239000011701 zinc Substances 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 6
- ZGUQGPFMMTZGBQ-UHFFFAOYSA-N [Al].[Al].[Zr] Chemical compound [Al].[Al].[Zr] ZGUQGPFMMTZGBQ-UHFFFAOYSA-N 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 6
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000005457 optimization Methods 0.000 claims description 6
- 230000035882 stress Effects 0.000 claims description 5
- 238000000137 annealing Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 238000005098 hot rolling Methods 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 abstract description 9
- 239000006104 solid solution Substances 0.000 abstract description 8
- 238000012545 processing Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000013000 roll bending Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910018569 Al—Zn—Mg—Cu Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012827 research and development 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
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- 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
-
- 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
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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
-
- 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
- C22F1/053—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 zinc as the next major constituent
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
- Metal Rolling (AREA)
Abstract
A method for controlling the transverse unevenness of a high-strength aluminum alloy plate relates to a technology for controlling the transverse unevenness of an aluminum alloy plate, and aims to solve the problem that the flatness of the conventional aluminum alloy plate cannot meet the requirement of being applied to a specific wing panel. The invention controls the direction and the size of the roll bending force of the rolling mill in the plate rolling process, controls the quenching water amount in the processes of roll straightening of the hot rolled plate before solid solution and cooling after solid solution so as to ensure uniform stress distribution of the quenched plate and reduce quenching deformation, and optimizes quenching parameters according to the test result of the residual stress of the plate after quenching so as to achieve the balanced control of the quenching stress of the plate and the action of the supporting force of a cross beam of a stretcher properly in the plate stretching process and improve the transverse flatness of the stretched plate. The transverse unevenness of the plate meets the ANSI H35.2 standard and meets the requirements of part processing and manufacturing.
Description
Technical Field
The invention relates to a technology for controlling the transverse unevenness of an aluminum alloy plate.
Background
The Al-Zn-Mg-Cu alloy belongs to a typical high-strength alloy in aluminum alloys, can be strengthened by heat treatment, and has the advantages of high strength, high toughness, good corrosion resistance, high specific strength, specific rigidity and the like; the alloy plates with different heat treatment states are widely applied to the field of aerospace as main structural materials; the width of the aluminum alloy plate which is produced at present and is installed and applied is basically below 2000mm, 2500mm ultra-wide plates are few, the flatness of the plate is a key index in the application process of the plate, the flatness of a plurality of large-size ultra-wide plates often meets the standard specification of materials but does not meet the processing conditions of parts, and installation and application of the plate cannot be achieved, so that the process of conversion of a plurality of research and development results and application of the plate are limited.
Disclosure of Invention
The invention aims to solve the problem that the flatness of the existing aluminum alloy plate cannot meet the requirement of being applied to a specific wing panel, and provides a method for controlling the transverse unevenness of a high-strength aluminum alloy plate.
The invention relates to a method for controlling the transverse unevenness of a high-strength aluminum alloy plate, which comprises the following steps of:
step one, according to the mass percentage of elements, Si is less than or equal to 0.10 percent, Fe is less than or equal to 0.15 percent, Cu: 2.0-2.6%, Mn less than or equal to 0.10%, Mg: 1.8-2.3%, Cr is less than or equal to 0.04%, Zn: 7.6-8.4%, Ti is less than or equal to 0.06%, Zr: 0.08 to 0.18 percent of Al and the balance of Al, weighing cathode copper, zinc ingots, primary magnesium ingots, aluminum-titanium intermediate alloys, aluminum-zirconium intermediate alloys and aluminum ingots, then adding the cathode copper, zinc ingots, primary magnesium ingots, aluminum-titanium intermediate alloys, aluminum-zirconium intermediate alloys and aluminum ingots into a dry smelting furnace, smelting, then casting into ingots with the specification of 420 multiplied by 1320 multiplied by 2000mm, 420 multiplied by 1620 multiplied by 2500mm or 450 multiplied by 1880 multiplied by 2100mm, and then carrying out homogenization annealing, face milling and saw cutting to obtain finished plate ingots;
step two, putting the finished plate ingot blank obtained in the step one into a resistance heating furnace, heating to 360-420 ℃, preserving heat for 8-13 hours, and then carrying out hot rolling on the finished plate ingot blank to obtain a prefabricated hot rolled plate;
thirdly, sawing the prefabricated hot rolled plate obtained in the second step, then placing the prefabricated hot rolled plate into a straightening machine for roll straightening, and adjusting the roll gap interval of the straightening machine to enable the transverse unevenness of the plate after roll straightening to be 5mm/2500 mm;
step four, carrying out solution treatment on the plate obtained in the step three in a roller hearth furnace, controlling the deformation degree of the plate after quenching through optimization of quenching cooling parameters of the plate after solution treatment, and optimizing and solidifying cooling conditions through a test result of residual stress after quenching;
step five, conveying the quenched plate obtained in the step four to a drawing machine for drawing;
step six, placing the plate stretched in the step five into an aging furnace, and performing aging treatment to obtain transverse unevenness: 0-5 mm/2m and longitudinal unevenness are: 0-3 mm/2m large-size aviation plates.
The invention has the beneficial effects that: by the transverse unevenness control method, large-size aviation plates with high flatness can be obtained; firstly, the roll bending force of a rolling mill is manually controlled in the plate rolling process, so that the metal flow of the whole transverse end face is uniform in the plate rolling hot processing deformation process, the deformation resistance difference is reduced, the cross section thickness of the plate is more uniform, and the deformation of a hot rolled plate after cooling is reduced; secondly, the internal stress of the hot rolled plate is more uniformly distributed by performing roll straightening before solid solution of the hot rolled plate, the cooling deformation in the solid solution quenching process is reduced, the deformation in the plate quenching process is improved by properly adjusting quenching cooling parameters, and the transverse unevenness of the plate is ensured to meet the ANSI H35.2 standard and the part processing and manufacturing requirements by combining the jacking action of a cross beam in the stretching process.
Drawings
Fig. 1 is a flow chart of a method for controlling the transverse unevenness of a high-strength aluminum alloy plate according to a first embodiment;
fig. 2 is a comparison graph of a real object before and after optimization of quenching parameters of a plate in the first embodiment, where a is a real object graph before optimization of quenching parameters of the plate, and b is a real object graph after optimization of quenching parameters of the plate.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 and 2, and the method for controlling the transverse unevenness of the high-strength aluminum alloy sheet according to the present embodiment includes the steps of:
step one, according to the mass percentage of elements, Si is less than or equal to 0.10 percent, Fe is less than or equal to 0.15 percent, Cu: 2.0-2.6%, Mn less than or equal to 0.10%, Mg: 1.8-2.3%, Cr is less than or equal to 0.04%, Zn: 7.6-8.4%, Ti is less than or equal to 0.06%, Zr: 0.08 to 0.18 percent of Al and the balance of Al, weighing cathode copper, zinc ingots, primary magnesium ingots, aluminum-titanium intermediate alloys, aluminum-zirconium intermediate alloys and aluminum ingots, then adding the cathode copper, zinc ingots, primary magnesium ingots, aluminum-titanium intermediate alloys, aluminum-zirconium intermediate alloys and aluminum ingots into a dry smelting furnace, smelting, then casting into ingots with the specification of 420 multiplied by 1320 multiplied by 2000mm, 420 multiplied by 1620 multiplied by 2500mm or 450 multiplied by 1880 multiplied by 2100mm, and then carrying out homogenization annealing, face milling and saw cutting to obtain finished plate ingots;
step two, putting the finished plate ingot blank obtained in the step one into a resistance heating furnace, heating to 360-420 ℃, preserving heat for 8-13 hours, and then carrying out hot rolling on the finished plate ingot blank to obtain a prefabricated hot rolled plate;
thirdly, sawing the prefabricated hot rolled plate obtained in the second step, then placing the prefabricated hot rolled plate into a straightening machine for roll straightening, and adjusting the roll gap interval of the straightening machine to enable the transverse unevenness of the plate after roll straightening to be 5mm/2500 mm; after the hot rolled plate is straightened by the roller, the transverse unevenness at different positions is 1-4 mm/2m, and the longitudinal unevenness is 0-3 mm/2 m; then loading the mixture into a roller hearth furnace for solid solution;
step four, carrying out solution treatment on the plate obtained in the step three in a roller hearth furnace, controlling the deformation degree of the plate after quenching through optimization of quenching cooling parameters of the plate after solution treatment, and optimizing and solidifying cooling conditions through a test result of residual stress after quenching;
step five, conveying the quenched plate obtained in the step four to a drawing machine for drawing;
step six, placing the plate stretched in the step five into an aging furnace, and performing aging treatment to obtain transverse unevenness: 0-5 mm/2m and longitudinal unevenness are: 0-3 mm/2m large-size aviation plates.
In the embodiment, the transverse unevenness control method selects a reasonable process flow, and realizes the optimized control of the transverse unevenness of the ultra-wide large-size plate through the control of the roll force in the rolling process, the roll straightening of the hot rolled plate before solid solution, the allocation of cooling parameters in the quenching and cooling process and the support of a cross beam in the stretching process; the prepared ultrahigh-strength alloy large-size wide plate has the advantages of transverse unevenness less than or equal to 5mm/2000m, uniform thickness and good surface, meets the requirements of use conditions in the processing process of plate parts, provides important guarantee for improving the localization rate of certain type passenger plane materials in China, and widens the channel for selecting materials of other subsequent machine types.
The aluminum alloy ultrahigh-strength large-size pre-stretched plate which is produced by the method for controlling the transverse unevenness and has the advantages of flat plate surface, uniform thickness, good surface and stable performance is adopted, the maximum value of the transverse unevenness of the plate is 5mm/2m, and the maximum value of the longitudinal unevenness of the plate is 3mm/2 m; the method is widely applied to various fields of aerospace, aviation, military and civil large-scale airplanes and the like.
The second embodiment is as follows: in this embodiment, the method for controlling the transverse unevenness of the high-strength aluminum alloy sheet according to the first embodiment is further defined, and in the second embodiment, when the finished sheet ingot is hot-rolled, the direction of the bending force is a forward direction, and the magnitude of the bending force is 2700 to 3000 KN.
In the embodiment, the direction of the bending roll force is adjusted to be the positive direction, and the force is 2700-3000 KN, so that the fine thickness difference of the cross section of the plate is finely controlled, the uniform thermal deformation of the whole transverse end face of the plate is ensured, and the deformation of the hot rolled plate after cooling is reduced.
The third concrete implementation mode: in the present embodiment, the method for controlling the transverse unevenness of the high-strength aluminum alloy sheet according to the first embodiment is further defined, and in the third step, the range of the set displacement value of the first roll in the leveler is: 17.0-25.0 mm; the displacement set value range of the two rollers on the straightening machine is as follows: 10.0-23.0 mm; the three-roller displacement set value range on the straightening machine is as follows: 10.0-20.5 mm; the displacement set value range of the four rollers on the straightening machine is as follows: 13.5-16.5 mm; the displacement set value range of the upper five rollers of the straightening machine is as follows: 13.5-16.5 mm; the displacement set value range of the six rollers on the straightening machine is as follows: 17.5-25.5 mm.
In the present embodiment, the upper roll displacement setting range of the leveler when the hot rolled sheet is roll-corrected is shown in table 1;
| sequence of straightening rolls | Set value range/mm of upper roll displacement |
| Last roller | 17.0～25.0 |
| Upper two rollers | 10.0～23.0 |
| Upper three-roller | 10.0～20.5 |
| Upper four rollers | 13.5～16.5 |
| Upper five rollers | 13.5～16.5 |
| Upper six rollers | 17.5～25.5 |
TABLE 1
The fourth concrete implementation mode: in this embodiment, the method for controlling the transverse unevenness of the high-strength aluminum alloy plate according to the first embodiment is further defined, and in the fourth embodiment, the quenching cooling parameters of the plate include the thickness of a finished product, the water content control of the forced cooling zone i, the water content control of the forced cooling zone ii and the quenching speed;
the thickness control range of the finished product is as follows: 19.05 mm-25.4 mm;
the water quantity control of the strong cooling zone I comprises the flow control of an upper nozzle of the zone I and the flow control of a lower nozzle of the zone I; wherein, nozzle flow control scope on I district is: 100L/s-220L/s; the flow control range of the nozzle under the zone I is as follows: 200-300L/s;
the water flow control of the forced cooling area II comprises flow control of an upper nozzle of the area II and flow control of a lower nozzle of the area II; wherein, the flow control range of the nozzle on the II area is as follows: 240-280 l/s; the flow control range of the nozzle under the zone II is as follows: 300-340L/s;
the quenching speed control range is as follows: 170 mm/s-200 mm/s.
In the present embodiment, the process parameters of the plate quenching zone are shown in table 2;
TABLE 2
The fifth concrete implementation mode: in this embodiment, the method for controlling the transverse unevenness of the high-strength aluminum alloy sheet according to the first embodiment is further limited, and in this embodiment, when the sheet after quenching is sent to a stretcher and stretched, the height of the cross beam of the stretcher is 10mm to 25 mm.
In the embodiment, the height of the beam is increased to 10-15 mm, so that the plate is acted by an upward force in the stretching process, and the effect of correcting the transverse unevenness is achieved; the transverse unevenness of the sheet was measured after the sheet was stretched.
According to the control method for the transverse unevenness of the high-strength aluminum alloy plate, the large-specification high-flatness aviation plate is obtained, firstly, the bending force of a rolling mill is manually controlled in the plate rolling process, the bending force is positive bending, and the force value is 2900KN, so that the metal flow of the whole transverse end face in the plate rolling, heating and processing deformation process is uniform, the deformation resistance difference is reduced, the thickness of the cross section of the plate is more uniform, and the deformation of the hot rolled plate after cooling is reduced; the stress distribution in the plate is more uniform by the solid solution front roller correction of the hot rolled plate, the cooling deformation in the solid solution quenching process is reduced, the deformation in the plate quenching process is improved by properly adjusting the quenching cooling parameters, and the transverse unevenness of the plate is ensured to meet the ANSI H35.2 standard and the part processing and manufacturing requirements at the same time by combining the jacking action of a cross beam in the stretching process.
Claims (5)
1. A transverse unevenness control method for a high-strength aluminum alloy plate is characterized by comprising the following steps:
step one, according to the mass percentage of elements, Si is less than or equal to 0.10 percent, Fe is less than or equal to 0.15 percent, Cu: 2.0-2.6%, Mn less than or equal to 0.10%, Mg: 1.8-2.3%, Cr is less than or equal to 0.04%, Zn: 7.6-8.4%, Ti is less than or equal to 0.06%, Zr: 0.08 to 0.18 percent of Al and the balance of Al, weighing cathode copper, zinc ingots, primary magnesium ingots, aluminum-titanium intermediate alloys, aluminum-zirconium intermediate alloys and aluminum ingots, then adding the cathode copper, zinc ingots, primary magnesium ingots, aluminum-titanium intermediate alloys, aluminum-zirconium intermediate alloys and aluminum ingots into a dry smelting furnace, smelting, then casting into ingots with the specification of 420 multiplied by 1320 multiplied by 2000mm, 420 multiplied by 1620 multiplied by 2500mm or 450 multiplied by 1880 multiplied by 2100mm, and then carrying out homogenization annealing, face milling and saw cutting to obtain finished plate ingots;
step two, putting the finished plate ingot blank obtained in the step one into a resistance heating furnace, heating to 360-420 ℃, preserving heat for 8-13 hours, and then carrying out hot rolling on the finished plate ingot blank to obtain a prefabricated hot rolled plate;
thirdly, sawing the prefabricated hot rolled plate obtained in the second step, then placing the prefabricated hot rolled plate into a straightening machine for roll straightening, and adjusting the roll gap interval of the straightening machine to enable the transverse unevenness of the plate after roll straightening to be 5mm/2500 mm;
step four, carrying out solution treatment on the plate obtained in the step three in a roller hearth furnace, controlling the deformation degree of the plate after quenching through optimization of quenching cooling parameters of the plate after solution treatment, and optimizing and solidifying cooling conditions through a test result of residual stress after quenching;
step five, conveying the quenched plate obtained in the step four to a drawing machine for drawing;
step six, placing the plate stretched in the step five into an aging furnace, and performing aging treatment to obtain transverse unevenness: 0-5 mm/2m and longitudinal unevenness are: 0-3 mm/2m large-size aviation plates.
2. The method for controlling the transverse unevenness of the high-strength aluminum alloy sheet according to claim 1, wherein in the second step, the direction of the bending roll force is positive and the magnitude of the bending roll force is 2700 to 3000KN when the finished sheet ingot is hot-rolled.
3. The method for controlling the transverse unevenness of the high-strength aluminum alloy sheet according to claim 1, wherein in the third step, the range of the set displacement value of a roller on the straightener is as follows: 17.0-25.0 mm; the displacement set value range of the two rollers on the straightening machine is as follows: 10.0-23.0 mm; the three-roller displacement set value range on the straightening machine is as follows: 10.0-20.5 mm; the displacement set value range of the four rollers on the straightening machine is as follows: 13.5-16.5 mm; the displacement set value range of the upper five rollers of the straightening machine is as follows: 13.5-16.5 mm; the displacement set value range of the six rollers on the straightening machine is as follows: 17.5-25.5 mm.
4. The method for controlling the transverse unevenness of the high-strength aluminum alloy plate according to claim 1, wherein in the fourth step, the quenching cooling parameters of the plate comprise the thickness of a finished product, the water content control of a strong cooling area I, the water content control of a strong cooling area II and the quenching speed;
the thickness control range of the finished product is as follows: 19.05 mm-25.4 mm;
the water quantity control of the strong cooling zone I comprises the flow control of an upper nozzle of the zone I and the flow control of a lower nozzle of the zone I; wherein, nozzle flow control scope on I district is: 100L/s-220L/s; the flow control range of the nozzle under the zone I is as follows: 200-300L/s;
the water flow control of the forced cooling area II comprises flow control of an upper nozzle of the area II and flow control of a lower nozzle of the area II; wherein, the flow control range of the nozzle on the II area is as follows: 240-280 l/s; the flow control range of the nozzle under the zone II is as follows: 300-340L/s;
the quenching speed control range is as follows: 170 mm/s-200 mm/s.
5. The method for controlling the transverse unevenness of the high-strength aluminum alloy sheet according to claim 1, wherein in the fifth step, when the sheet after quenching is sent to a stretcher for stretching, the rise height of a cross beam of the stretcher is 10mm to 25 mm.
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| JP2006199978A (en) * | 2005-01-18 | 2006-08-03 | Furukawa Sky Kk | Method for producing aluminum alloy hot rolled sheet for welded structure |
| CN101037747A (en) * | 2007-04-29 | 2007-09-19 | 东北轻合金有限责任公司 | Aviation aluminum alloy pre-stretching plate and production method thereof |
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| CN110241337A (en) * | 2019-06-25 | 2019-09-17 | 天津忠旺铝业有限公司 | A kind of preparation method of super large wide cut aluminum alloy plate materials |
| CN110453121A (en) * | 2019-09-09 | 2019-11-15 | 广西南南铝加工有限公司 | A kind of 7xxx line aluminium alloy plate of high brightness and preparation method thereof |
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| CN112207522A (en) * | 2020-10-26 | 2021-01-12 | 许晨玲 | Flatness control method for large aluminum alloy integral wall plate |
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