CN115156287A - Roll extrusion compounding-creep age forming manufacturing method for high-performance aluminum alloy ribbed wallboard - Google Patents

Roll extrusion compounding-creep age forming manufacturing method for high-performance aluminum alloy ribbed wallboard Download PDF

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CN115156287A
CN115156287A CN202210795636.4A CN202210795636A CN115156287A CN 115156287 A CN115156287 A CN 115156287A CN 202210795636 A CN202210795636 A CN 202210795636A CN 115156287 A CN115156287 A CN 115156287A
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aluminum alloy
ribbed
rolling
wallboard
creep age
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CN115156287B (en
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刘春辉
魏硕
马培培
湛利华
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Central South University
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Central South University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/227—Surface roughening or texturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/021—Rolls for sheets or strips
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B2001/081—Roughening or texturing surfaces of structural sections, bars, rounds, wire rods

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
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  • Metallurgy (AREA)
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Abstract

The invention discloses a manufacturing method of high-performance aluminum alloy ribbed wallboard rolling extrusion compounding-creep age forming, which comprises the following steps: carrying out solution treatment and water quenching on the aluminum alloy to obtain a quenched aluminum alloy plate; rolling the quenched aluminum alloy plate along the original rolling direction at room temperature to obtain a ribbed wallboard; wherein, the rolling is carried out by adopting a cold rolling mill, and the outer circumferential surface of an upper roller of the cold rolling mill is annularly provided with a groove; and placing the ribbed wallboard in a mould for creep age forming treatment to obtain the high-performance integral ribbed wallboard. The upper roller is designed into a roller structure with a groove, the aluminum alloy after solution quenching is subjected to single-pass or multi-pass cold rolling to obtain the integral aluminum alloy ribbed wallboard with high dislocation density, and the ribbed wallboard obtained by cold rolling is subjected to creep aging forming treatment, so that the integral forming of the high-performance ribbed wallboard is realized, and the method has the advantages of high material utilization rate, low energy consumption and great improvement of the comprehensive performance of the product.

Description

Roll extrusion compounding-creep age forming manufacturing method for high-performance aluminum alloy ribbed wallboard
Technical Field
The invention relates to the technical field of non-ferrous metal material processing engineering, in particular to a manufacturing method of high-performance aluminum alloy ribbed wallboard rolling and extruding compounding-creep age forming.
Background
Due to the rapid development of industrial science and technology, the requirement on modern high-end manufacturing industry is higher, the requirement is particularly high in the field of aerospace, most parts are designed into an integral ribbed structure for improving the aerodynamic performance and integrity, high speed and high maneuverability of an airplane, and due to the fact that aluminum alloy has the advantages of being small in density, large in specific strength, excellent in corrosion resistance and easy to machine and form, the high-strength aluminum alloy large-sized ribbed wallboard component is more applied to aerospace transportation equipment, and the high-quality preparation technology of the high-strength aluminum alloy large-sized ribbed wallboard component is one of the preferential development technologies for manufacturing aviation transportation equipment.
However, the ribbed wallboard component is difficult to manufacture due to strict performance requirements, high forming precision requirements and complex structure. At present, the ribbed wallboard is manufactured by assembling skin and longitudinal and transverse reinforcing ribs by riveting, gluing or spot welding, but the rigidity, the strength and the sealing performance of the assembled wallboard are poor. The integral ribbed wallboard component can well overcome the series of problems, and the integral ribbed wallboard can also reduce the number of parts, bolts, rivets and other fasteners contained in the component, reduce the weight of machine body parts and improve the assembly quality of the pneumatic surface and the appearance. However, the existing integrated forming process of the integral ribbed wallboard has the following defects:
(1) The thick plate milling manufacturing process has the defects of large machining amount, low material utilization rate and high manufacturing cost, so that the requirement of efficient and rapid manufacturing is difficult to meet;
(2) Extrusion forming has relatively high forming precision, but the production mode has the defects of high extrusion difficulty and easy instability, and large ribbed wallboard components are difficult to process, so that the application is limited;
(3) Although the traditional rolling process is low in production cost and simple in operation, the rolled components are mostly flat plate frameworks with simple structures, and the manufacturing of the components with complex shapes, such as ribbed thin-wall plates, needs to be further explored.
Therefore, a forming method of the high-strength aluminum alloy ribbed wallboard meeting the manufacturing requirements of high performance, low cost and the like is urgently needed so as to obtain an excellent formed component applied to aerospace equipment.
Disclosure of Invention
In view of the defects existing at present, the invention provides a manufacturing method of high-performance aluminum alloy ribbed wallboard rolling extrusion compounding-creep aging forming, wherein an upper roller is designed into a roller structure with a groove, then single-pass or multi-pass cold rolling is carried out on an aluminum alloy plate after solution quenching to obtain an integral aluminum alloy ribbed wallboard with high dislocation density, and then creep aging forming treatment is carried out on the ribbed wallboard obtained by cold rolling, so that the integral forming of the high-performance ribbed wallboard is realized.
In order to achieve the aim, the invention provides a roll extrusion compounding-creep age forming manufacturing method of a high-performance aluminum alloy ribbed wallboard, which is characterized by comprising the following steps:
the method comprises the following steps: carrying out solution treatment on the aluminum alloy plate, and then carrying out water quenching to obtain a quenched aluminum alloy plate;
step two: rolling the quenched aluminum alloy plate along the original rolling direction at room temperature to obtain a ribbed wall plate; the rolling is carried out by adopting a cold rolling mill, and a groove is annularly arranged on the outer circumferential surface of an upper roller of the cold rolling mill;
step three: and placing the ribbed wallboard in a mould for creep age forming treatment to obtain the high-performance integral ribbed wallboard.
According to one aspect of the invention, the grooves of the upper roll are formed by machining or by connecting a plurality of divided rolls by bearings.
According to one aspect of the invention, the axial distance of the dividing rolls is 5-20mm.
According to an aspect of the invention, the depth of the groove is 5-30mm and the width of the groove is 5-20mm.
According to one aspect of the invention, the thickness of the aluminum alloy plate is 10-30mm, the ribbed wall plate comprises a wall plate and ribs, and the pressing amount of the wall plate is 60-80% of the thickness of the aluminum alloy plate.
According to one aspect of the invention, the rolling is a multiple pass rolling.
According to one aspect of the invention, the solid solution temperature in the first step is 400-600 ℃, and the solid solution time is 0.5-3h.
According to one aspect of the invention, the temperature of the creep age forming treatment in the third step is 100-200 ℃, the treatment time is 4-16h, and the creep stress is 50-300MPa.
In accordance with one aspect of the invention, the aluminum alloy sheet material is an age-hardenable aluminum alloy.
In accordance with one aspect of the invention, the age-hardening aluminum alloy includes an aluminum lithium alloy, a 2xxx series, a 6xxx series, and a 7xxx series.
The invention has the beneficial effects that:
(1) According to the method, the upper roller with the groove is used for rolling, so that the aluminum alloy plate flows and fills the groove in the extrusion state of the roller, the ribs are processed, the integral processing of the ribbed wallboard with high dislocation density is realized, the ribs are processed while the aluminum alloy plate is thinned into the wallboard, the processing flow of the component is greatly simplified, and the production efficiency is improved;
(2) The integral ribbed wallboard with high dislocation density is obtained by cold rolling at room temperature, so that the creep amount of the wallboard in subsequent creep aging forming treatment is greatly improved, the resilience after the creep aging forming unloading is reduced, the design difficulty of a die in the creep aging forming process is reduced, and the performance of the ribbed wallboard in the process is obviously improved compared with that of a hot rolling process;
(3) The upper roller with the groove is designed with two schemes, wherein the rollers can be assembled according to the actual production requirement in the sub-roller rolling process, the width of ribs can be conveniently adjusted, and the production efficiency is greatly improved;
(4) The ribbed wallboard is manufactured by means of rolling and extruding composite-creep age forming, integrated processing of the ribbed wallboard is achieved by means of a cold rolling process, creep age forming treatment is combined, the ribbed wallboard with high size precision and small residual stress is obtained, and the production period of the integrated ribbed wallboard is shortened.
Compared with the traditional process for riveting ribs after the rolling of the aluminum alloy plate and milling the ribbed wallboard from the thick plate, the aluminum alloy grooved cold rolling process has the advantages of higher material utilization rate, lower cost, capability of realizing the one-step rolling forming of the complex ribbed thin-walled plate, high forming precision and good stability, and compared with the wallboard obtained by hot rolling, the integral ribbed wallboard with higher dislocation density can be obtained by the cold rolling process, so that the creep deformation amount of creep age forming and the comprehensive performance of the ribbed wallboard are greatly improved, and the method has important application value.
Drawings
FIG. 1 is a graph comparing the amount of creep for the ribbed wallboard of examples 1-2 and comparative examples 1-4;
FIG. 2 is a schematic illustration of the rolling process of the present application;
FIG. 3 is a schematic view of the upper roll groove configuration of two configurations of the present application;
fig. 4 is a schematic view of the high dislocation density ribbed panel obtained by cold rolling according to the present application before and after creep aging treatment.
Description of the drawings: 1. an aluminum alloy sheet in a quenched state; 2. an upper roller; 3. a lower roller; 4. a ribbed wallboard; 5. a groove; 6. a mold; 7. high performance integral ribbed siding; 8. ribs; 21. a bearing; 22. and (5) rolling.
Detailed Description
In order that the invention may be more readily understood, reference will now be made to the following examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention, and it should be understood that the described examples are only a portion of the examples of the present invention, rather than the entire scope of the present invention. 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. Unless otherwise defined, the terms used hereinafter are consistent with the meaning understood by those skilled in the art; unless otherwise specified, the starting materials referred to herein may be purchased from commercial sources or prepared by well-known methods.
The invention is a process method for preparing high-performance integral ribbed wallboard by carrying out rolling extrusion compounding-creep aging forming on an aluminum alloy plate through an upper roller 2 with a groove 5, the rolling process is shown as figure 2, the process method mainly comprises a quenching aluminum alloy plate 1, an upper roller 2 with a groove 5, a lower roller 3 and a ribbed plate 4, and the quenching aluminum alloy plate 1 after solution quenching treatment is rolled along the original rolling direction at room temperature to obtain the ribbed wallboard 4 with ribs 8 integrally connected with the wallboard; there are two main design methods for the groove 5 structure of the upper roll 2, the right drawing in fig. 3 is to machine the groove 5 of the desired size on the upper roll 2, and the left drawing in fig. 3 is to connect by a plurality of sub-rolls 22 using bearings 21, thereby producing the groove 5 structure; then, creep age forming treatment is carried out on the ribbed wallboard 4 with high dislocation density obtained by cold rolling, and specifically as shown in fig. 4, wherein the left drawing in fig. 4 is a schematic diagram before creep age forming is carried out on the ribbed wallboard 4 after cold rolling; the right drawing in fig. 4 is a schematic drawing of the cold rolled ribbed panel 4 after creep aging.
The aluminum alloys used in the examples of the present invention and the comparative examples each had a size of 300mm × 300mm and a thickness of 10mm. The rolling mill used for rolling is a cold rolling mill for carrying out split-roll rolling, the rolling force is 1800KN, the rolling speed is 7rpm/min, the motor power is 185W, and the thickness of the wall plate in the ribbed wall plate after cold rolling is 60-80%. The thickness is 2 +/-0.5 mm, the ribbed wallboard is placed in a die and fixed, a hydraulic loader is used for pressurizing, the creep aging temperature is 100-200 ℃, the processing time is 4-16h, the creep stress is 50-300MPa, and meanwhile, an experiment is carried out on an RMT-D10 electronic type high-temperature creep endurance strength testing machine produced by the Sagitaiji company, the temperature control precision of the testing machine is +/-2 ℃, the load precision is +/-3N, and the deformation precision is +/-0.002 mm.
Example 1
2219 the aluminum-copper alloy plate is subjected to solid solution treatment at 535 ℃ for 45min in an air circulation resistance furnace, and immediately water quenching is carried out to obtain a quenched aluminum alloy plate; then rolling along the original rolling direction at room temperature, wherein an upper roller of a cold rolling mill consists of four sub-rollers and three bearings, a multi-pass cold rolling process is adopted, the reduction of each pass is 10%, the ribbed wallboard with the thickness of 2mm is rolled, then the ribbed wallboard is placed in a die for creep aging forming treatment, the high-performance integral ribbed wallboard is obtained, a tensile sample after creep aging is taken for performance test, and the tensile test adopts the standard as follows: GB/T228-2002.
Example 2
2195 subjecting the Al-Li alloy plate to solution treatment in an air circulating resistance furnace at 510 deg.C for 30min, and immediately water quenching to obtain quenched Al-Li alloy plate; because the elongation of the aluminum-lithium alloy after quenching at low temperature is more excellent, the plate is soaked for 30min by using liquid nitrogen, then is rolled along the original rolling direction at room temperature, an upper roller of a cold rolling mill consists of four sub-rollers and three bearings, a multi-pass cold rolling process is adopted, the reduction of each pass is 10%, the ribbed plate with the thickness of 2mm is rolled into the ribbed plate, then the ribbed plate is placed in a die for creep aging forming treatment, the high-performance integral ribbed plate is obtained, a tensile sample after creep aging is taken, and the performance test is carried out, wherein the tensile test adopts the standard as follows: GB/T228-2002.
Comparative example 1
Milling 2219-T4 aluminum alloy plate by using a machining center to obtain an integral ribbed wallboard, then placing the ribbed wallboard in a mould to perform creep aging forming treatment (same as embodiment 1), taking a tensile sample after creep aging, and performing performance test, wherein the tensile test adopts the standard as follows: GB/T228-2002.
Comparative example 2
Milling 2219-T3 aluminum alloy plate by using a machining center to obtain an integral ribbed wallboard, then placing the ribbed wallboard in a mould to perform creep aging forming treatment (same as embodiment 1), taking a tensile sample after creep aging, and performing performance test, wherein the tensile test adopts the standard as follows: GB/T228-2002.
Comparative example 3
The 2195-T4 aluminum alloy plate is milled by a machining center, so that an integral ribbed plate is obtained, then the ribbed plate is placed in a die for creep aging forming (same as embodiment 2), a tensile sample after creep aging is taken for performance testing, and the tensile test adopts the standard as follows: GB/T228-2002.
Comparative example 4
Utilize machining center to carry out milling process to 2195-T3 aluminum alloy plate to obtain whole ribbed wallboard, then place ribbed wallboard and carry out creep aging forming treatment (with embodiment 2) in the mould, and get the tensile sample after the creep aging, carry out performance test, tensile test adopts the standard to be: GB/T228-2002.
Performance detection
The embodiment 1 and the embodiment 2 are 2219 aluminum alloy integral ribbed wallboard and 2195 aluminum lithium alloy integral ribbed wallboard obtained by rolling by using a split roller at room temperature, and creep age forming treatment is carried out on the rolled ribbed wallboard; the method comprises the following steps of (1) milling 2219-T4 aluminum alloy plates and 2219-T3 aluminum alloy plates to obtain ribbed wallboards respectively in a comparative example 1 and a comparative example 2, and carrying out creep age forming treatment on the ribbed wallboards after rolling is completed; FIG. 1 shows creep measurements of the final products obtained in examples 1-2 and comparative examples 1-4. As shown in fig. 1, compared with the conventional process (comparative examples 1-4), the creep amount of the ribbed wallboard with high dislocation density manufactured by roll splitting rolling in the embodiment 1 and the embodiment 2 at room temperature is greatly improved, and the requirement on forming precision in the creep aging forming process of the aluminum alloy ribbed wallboard is met; wherein, 1 in fig. 1 is a curve corresponding to embodiment 1; 2 is the corresponding curve of example 2; 3 is a curve corresponding to comparative example 1; 4 is a curve corresponding to comparative example 2; 5 is a curve corresponding to comparative example 3; comparative example 4 is a curve corresponding to comparative example 6.
TABLE 1 mechanical properties (strength unit: MPa elongation unit:%) of comparative examples and comparative examples after creep aging treatment
Example 1 Comparative example 1 Comparative example 2 Example 2 Comparative example 3 Comparative example 4
Yield strength 467 276 368 595 552 442
Tensile strength 515 394 461 627 576 549
Elongation percentage 8.2 13.1 7.2 5.0 8.3 7.1
Table 1 shows the mechanical properties of the integral ribbed wallboard prepared in examples 1-2 and comparative examples 1-4, and the data shows that the rolling, extruding, compounding and creep aging forming process for the aluminum alloy ribbed wallboard, provided by the invention, can obviously improve the yield strength and tensile strength while obtaining the integral ribbed wallboard, and has the advantages of high material utilization rate and low energy consumption. Therefore, the invention discloses a rolling extrusion composite-creep age forming manufacturing process capable of realizing integral forming of the light high-strength aluminum alloy ribbed wallboard.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. The roll extrusion compounding-creep age forming manufacturing method of the high-performance aluminum alloy ribbed wallboard is characterized by comprising the following steps of:
the method comprises the following steps: carrying out solution treatment on the aluminum alloy plate, and then carrying out water quenching to obtain a quenched aluminum alloy plate;
step two: rolling the quenched aluminum alloy plate along the original rolling direction at room temperature to obtain a ribbed wallboard; the rolling is carried out by adopting a cold rolling mill, and the outer circumferential surface of an upper roller of the cold rolling mill is annularly provided with a groove;
step three: and (3) placing the ribbed wallboard in a mould to perform creep age forming treatment to obtain the high-performance integral ribbed wallboard.
2. The manufacturing method of the high-performance aluminum alloy ribbed panel by roll extrusion composite-creep age forming of claim 1, wherein the groove of the upper roller is formed by machining or by connecting a plurality of sub rollers through a bearing.
3. The roll extrusion composite-creep age forming manufacturing method of the high performance aluminum alloy ribbed panel according to claim 2, characterized in that the axial distance of the branch rolls is 5-20mm.
4. The roll extrusion composite-creep age forming manufacturing method of the high performance aluminum alloy ribbed panel according to claim 1, wherein the depth of the groove is 5-30mm, and the width of the groove is 5-20mm.
5. The roll extrusion composite-creep age forming manufacturing method of the high-performance aluminum alloy ribbed panel according to claim 1, wherein the thickness of the aluminum alloy panel is 10-30mm, the ribbed panel comprises a panel and ribs, and the pressing amount of the panel is 60-80% of the thickness of the aluminum alloy panel.
6. The roll extrusion composite-creep age forming manufacturing method of high performance aluminum alloy ribbed panels according to claim 1, characterized in that the rolling is multi-pass rolling.
7. The roll extrusion composite-creep age forming manufacturing method of the high-performance aluminum alloy ribbed panel according to claim 1, characterized in that the solid solution temperature in the first step is 400-600 ℃, and the solid solution time is 0.5-3h.
8. The manufacturing method of the high-performance aluminum alloy ribbed wallboard by roll extrusion and creep age forming is characterized in that the temperature of the creep age forming treatment in the third step is 100-200 ℃, the treatment time is 4-16h, and the creep stress is 50-300MPa.
9. The roll extrusion composite-creep age forming method of high performance aluminum alloy ribbed panel according to claim 1 wherein said aluminum alloy sheet is age-hardened aluminum alloy.
10. The high performance aluminum alloy ribbed panel roll extrusion composite-creep age forming manufacturing method according to claim 9 wherein the age hardening aluminum alloy includes aluminum lithium alloy, 2xxx series, 6xxx series, and 7xxx series.
CN202210795636.4A 2022-07-07 2022-07-07 Rolling extrusion composite-creep aging forming manufacturing method for high-performance aluminum alloy ribbed wallboard Active CN115156287B (en)

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