CN111299322A - Preparation method of brazing aluminum alloy material and brazing aluminum alloy material - Google Patents
Preparation method of brazing aluminum alloy material and brazing aluminum alloy material Download PDFInfo
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- CN111299322A CN111299322A CN202010180700.9A CN202010180700A CN111299322A CN 111299322 A CN111299322 A CN 111299322A CN 202010180700 A CN202010180700 A CN 202010180700A CN 111299322 A CN111299322 A CN 111299322A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 60
- 238000005219 brazing Methods 0.000 title claims abstract description 51
- 239000000956 alloy Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000011888 foil Substances 0.000 claims abstract description 73
- 239000000463 material Substances 0.000 claims abstract description 61
- 239000002131 composite material Substances 0.000 claims abstract description 34
- 239000011162 core material Substances 0.000 claims abstract description 31
- 238000005098 hot rolling Methods 0.000 claims abstract description 31
- 238000005096 rolling process Methods 0.000 claims abstract description 31
- 238000005097 cold rolling Methods 0.000 claims abstract description 29
- 238000000137 annealing Methods 0.000 claims abstract description 28
- 238000013329 compounding Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000005452 bending Methods 0.000 claims abstract description 14
- 238000001953 recrystallisation Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 description 12
- 239000012535 impurity Substances 0.000 description 12
- 229910052725 zinc Inorganic materials 0.000 description 12
- 239000010985 leather Substances 0.000 description 11
- 238000003723 Smelting Methods 0.000 description 5
- 238000009749 continuous casting Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005269 aluminizing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
- B21B1/40—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 foils which present special problems, e.g. because of thinness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
Abstract
The invention provides a preparation method of a brazing aluminum alloy material and the brazing aluminum alloy material. The preparation method of the brazing aluminum alloy material comprises the following steps: compounding materials: compounding the core material and the skin material to obtain a composite material; hot rolling: preheating the composite material, and hot-rolling the preheated composite material to the thickness of 5-10 mm to obtain a hot-rolled plate strip; intermediate rolling: carrying out intermediate cold rolling on the hot-rolled strip to obtain a cold-rolled strip foil; intermediate annealing: carrying out recrystallization annealing on the cold-rolled strip foil to obtain an O-state strip foil; and (3) finish rolling: carrying out final cold rolling on the O-state strip foil until the thickness is 0.4-3.0 mm, and obtaining a final rolled strip foil; stretch bending and straightening: and correcting the final rolled strip foil, and baking the corrected strip foil through a baking device at a preset speed. The method comprises the step of baking the plate through a roaster to obtain the cleaning-free brazing aluminum alloy material.
Description
Technical Field
The disclosure belongs to the field of materials, and particularly relates to a preparation method of a brazing aluminum alloy material and the brazing aluminum alloy material.
Background
The aluminum alloy has the advantages of low density, high heat conductivity, good mechanical property and corrosion resistance and the like, and is a main material of the heat exchanger. At present, the aluminizing rate of the automobile heat exchanger reaches over 90 percent.
The brazing technology has the advantages of simplified operation and high production efficiency. However, when brazing is used to manufacture an aluminum heat exchanger, a cleaning process is required to remove oil from the raw material before use due to brazing requirements.
The aluminum alloy material for brazing produced by the prior art has large surface oil quantity, influences brazing, cannot be directly used by customers and needs to be cleaned by special cleaning equipment. The special cleaning equipment has the defects of waste of production sites, great energy consumption for maintenance, increase of production process and the like, and a sewage treatment system is required to be arranged to cause pollution of water resources and atmosphere.
Disclosure of Invention
The disclosure aims to provide a preparation method of a brazing aluminum alloy material and the brazing aluminum alloy material, wherein oil stains on the surface of the brazing aluminum alloy material are removed through a roaster, and the dyne value of the surface of the brazing aluminum alloy material is improved.
One embodiment of the present disclosure provides a method for preparing a brazing aluminum alloy material, including: compounding materials: compounding the core material and the skin material to obtain a composite material; hot rolling: preheating the composite material, and hot-rolling the preheated composite material to the thickness of 5-10 mm to obtain a hot-rolled plate strip; intermediate rolling: carrying out intermediate cold rolling on the hot-rolled strip to obtain a cold-rolled strip foil; intermediate annealing: carrying out recrystallization annealing on the cold-rolled strip foil to obtain an O-state strip foil; and (3) finish rolling: carrying out final cold rolling on the O-state strip foil until the thickness is 0.4-3.0 mm, and obtaining a final rolled strip foil; stretch bending and straightening: and correcting the final rolled strip foil, and baking the corrected strip foil through a baking device at a preset speed.
According to some embodiments of the present disclosure, in the hot rolling, the preheating temperature of the composite material is 450 ℃ to 550 ℃, and the holding time is 2 to 10 hours.
According to some embodiments of the disclosure, the intermediate rolling is performed by performing a plurality of intermediate cold rolling on the hot-rolled strip.
According to some embodiments of the present disclosure, in the intermediate annealing, the annealing temperature of the recrystallization annealing is 350 ℃ to 500 ℃, and the holding time is 2 to 10 hours.
According to some embodiments of the disclosure, the cold rolling reduction in the final rolling is between 20% and 60%.
According to some embodiments of the present disclosure, in the stretch bending straightening, the straightened strip foil is baked by a baking device at a speed of 10-100 m/min.
According to some embodiments of the present disclosure, in the material composition, the core material is 3003MOD aluminum alloy, and the skin material is 4045 aluminum alloy.
According to some embodiments of the disclosure, the material, prior to compounding, comprises: casting: respectively casting a core material ingot and a skin material ingot according to the components of the core material and the skin material, and taking the core material ingot as the core material; rolling the skin material: and preheating the skin material cast ingot, and then carrying out hot rolling to obtain the skin material.
According to some embodiments of the disclosure, in the skin material rolling, the preheating temperature of the skin material cast ingot is 450-550 ℃, and the heat preservation time is 2-10 hours.
One embodiment of the present disclosure provides a brazing aluminum alloy material prepared by the method as described above.
According to the preparation method of the brazing aluminum alloy material, the corrected strip foil is baked through the roaster to achieve the purpose of oil removal, and the brazing aluminum alloy material does not need to be cleaned before brazing and can be directly used; the use of special cleaning equipment is avoided, the cost is saved, and the production process flow is shortened.
Drawings
FIG. 1 is a schematic illustration of a composite material according to an embodiment of the disclosure;
FIG. 2 is a flowchart of a method of making a brazing aluminum alloy material according to an embodiment of the disclosure;
FIG. 3 is a schematic view of a roaster according to an embodiment of the present disclosure;
fig. 4 is a schematic view of another orientation of a toaster according to embodiments of the present disclosure.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments can be modified in various different ways, without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "straight", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present disclosure. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.
Throughout the description of the present disclosure, it is to be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection, either mechanically, electrically, or otherwise in communication with one another; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the disclosure. To simplify the disclosure of the present disclosure, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present disclosure. Moreover, the present disclosure may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The preferred embodiments of the present disclosure will be described below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are merely for purposes of illustrating and explaining the present disclosure and are not intended to limit the present disclosure.
As shown in fig. 1, the brazing aluminum alloy material 100 according to the present embodiment is formed by roll-compounding a core material 110 and a skin material 120. Optionally, the brazing aluminum alloy material is compounded from top to bottom according to the sequence of the skin material, the core material and the skin material. Optionally, the core material is 3003MOD aluminum alloy, and the skin material is 4045 aluminum alloy.
3003MOD aluminum alloy comprises: si: 0.6 wt%, Fe: 0.7 wt%, Cu: 0.05-0.2 wt%, Mn: 1.0-1.5 wt%, Zn: 0.1 wt%, the balance being Al and less than 0.15 wt% of unavoidable impurities.
The 4045 aluminum alloy includes: si: 9-11 wt%, Fe: 0.8 wt%, Cu: 0.3 wt%, Mn: 0.05 wt%, Zn: 0.1 wt%, Ti: 0.2 wt%, Mg: 0.05 wt%, the balance being Al and less than 0.15 wt% of unavoidable impurities. The composite ratio of the leather materials on the two sides is 5-20 percent respectively;
fig. 2 is a flowchart of a preparation method of the brazing aluminum alloy material according to the embodiment of the disclosure. The preparation method of the brazing aluminum alloy material comprises the following steps: material compounding, hot rolling, intermediate annealing, final rolling and stretch bending straightening. Specifically, the method comprises the following steps:
compounding materials: the core material and the skin material were compounded as shown in fig. 1 to obtain a composite material.
Hot rolling: preheating the composite material, and hot-rolling the preheated composite material to the thickness of 5-10 mm to obtain a hot-rolled plate strip. Optionally, in the hot rolling, the preheating temperature of the composite material is 450-550 ℃, and the heat preservation time is 2-10 h.
Intermediate rolling: and carrying out intermediate cold rolling on the hot-rolled strip to obtain a cold-rolled strip foil. Optionally, in the intermediate rolling, multi-pass intermediate cold rolling is performed on the hot-rolled strip.
Intermediate annealing: and (4) carrying out recrystallization annealing on the cold-rolled strip foil to obtain an O-state strip foil. Optionally, in the intermediate annealing, the annealing temperature of the recrystallization annealing is 350-500 ℃, and the heat preservation time is 2-10 h.
And (3) finish rolling: and carrying out final cold rolling on the O-state strip foil until the thickness is 0.4-0.7 mm, and obtaining the final rolled strip foil. Optionally, in the finish rolling, the cold rolling reduction is between 20% and 60%.
Stretch bending and straightening: and correcting the final rolled strip foil, and baking the corrected strip foil through a baking device at a preset speed. And baking the corrected surface of the strip foil by a baking device so as to remove oil on the surface of the strip foil and obtain the required brazing aluminum alloy material.
As shown in fig. 3 and 4, the arrow in fig. 4 indicates the moving direction of the brazing aluminum alloy material. Optionally, in the stretch bending straightening, the straightened strip foil is baked by the baking device 200 at a speed of 10-100 m/min. The roaster 200 is disposed above and below the upper and lower surfaces of the rectified tape foil, respectively. The roaster 200 includes a plurality of flame nozzles 210 arranged in sequence, and the flame nozzles 210 may flame the rectified strip foil to bake the rectified strip foil. In this embodiment, the roaster 200 is fixed to the stretch-bending straightening apparatus. By controlling the moving speed of the corrected tape foil, the time for baking the corrected tape foil by the roaster 200 is controlled, and the corrected tape foil is prevented from being over-burned and deformed.
Before the material is compounded, the method comprises the following steps:
casting: respectively casting a core material ingot and a skin material ingot according to the components of the core material and the skin material, and taking the core material ingot as the core material;
rolling the skin material: preheating the skin material cast ingot, and then carrying out hot rolling to obtain the skin material. Optionally, in the skin material rolling, the preheating temperature of the skin material cast ingot is 450-550 ℃, and the heat preservation time is 2-10 hours.
Example 1
The brazing aluminum alloy material provided by the embodiment is formed by rolling and compounding a core material and a skin material. Wherein, the core is 3003MOD, includes: si: 0.6 wt%, Fe: 0.7 wt%, Cu: 0.05-0.2 wt%, Mn: 1.0-1.5 wt%, Zn: 0.1 wt%, the balance being Al and less than 0.15 wt% of unavoidable impurities.
The leather material is 4045 and comprises: si: 9-11 wt%, Fe: 0.8 wt%, Cu: 0.3 wt%, Mn: 0.05 wt%, Zn: 0.1 wt%, Ti: 0.2 wt%, Mg: 0.05 wt%, the balance being Al and less than 0.15 wt% of unavoidable impurities. The composite ratio of the leather materials at the two sides is 5 percent respectively;
the preparation process of the brazing aluminum alloy material comprises the following steps:
respectively putting 3003MOD and 4045 aluminum alloys into a smelting furnace for melting, and respectively preparing 3003MOD and 4045 cast ingots by adopting a semi-continuous casting method. 4045 is preheated at 450 deg.C for 10 hr, and then hot rolled.
And compounding 3003MOD and 4045 according to 4045, 3003MOD and 4045 from top to bottom to obtain the composite material. Heating the composite material to 450 ℃, preserving heat for 10h for preheating, transferring the composite material to a hot rolling track for hot rolling, and obtaining a hot rolled plate strip after multiple hot rolling until the thickness is 10 mm. And after the hot rolled strip is cooled to the room temperature, carrying out multi-pass cold rolling on the hot rolled strip to obtain the cold rolled strip foil. And (3) carrying out recrystallization annealing on the cold-rolled strip foil in an annealing furnace at the temperature of 350 ℃, and keeping the temperature for 10 hours to obtain the O-state strip foil. The O-state strip foil obtained was subjected to final cold rolling to obtain a final rolled strip foil having a thickness of 0.4mm and a cold rolling reduction of 60%. And finally, correcting the shape of the finally rolled strip foil in stretch bending straightening equipment, simultaneously baking the upper surface and the lower surface of the corrected strip foil through a baking device at the speed of 100m/min, and rolling after baking. The surface dyne value was detected to be 42 dyn/cm.
Example 2
The brazing aluminum alloy material provided by the embodiment is formed by rolling and compounding a core material and a skin material. Wherein, the core is 3003MOD, includes: si: 0.6 wt%, Fe: 0.7 wt%, Cu: 0.05-0.2 wt%, Mn: 1.0-1.5 wt%, Zn: 0.1 wt%, the balance being Al and less than 0.15 wt% of unavoidable impurities.
The leather material is 4045 and comprises: si: 9-11 wt%, Fe: 0.8 wt%, Cu: 0.3 wt%, Mn: 0.05 wt%, Zn: 0.1 wt%, Ti: 0.2 wt%, Mg: 0.05 wt%, the balance being Al and less than 0.15 wt% of unavoidable impurities. The composite ratio of the leather materials on the two sides is 15 percent respectively;
the preparation process of the brazing aluminum alloy material comprises the following steps:
respectively putting 3003MOD and 4045 aluminum alloys into a smelting furnace for melting, and respectively preparing 3003MOD and 4045 cast ingots by adopting a semi-continuous casting method. 4045 is preheated at 500 deg.C for 6h, and then hot rolled.
And compounding 3003MOD and 4045 according to 4045, 3003MOD and 4045 from top to bottom to obtain the composite material. And heating the composite material to 550 ℃, preserving heat for 2h for preheating, transferring to a hot rolling track for hot rolling, and performing hot rolling for multiple times until the thickness is 5mm to obtain a hot rolled plate strip. And after the hot rolled strip is cooled to the room temperature, carrying out multi-pass cold rolling on the hot rolled strip to obtain the cold rolled strip foil. And (3) carrying out recrystallization annealing on the cold-rolled strip foil in an annealing furnace at the temperature of 500 ℃, and keeping the temperature for 2h to obtain the O-state strip foil. The O-state strip foil obtained was subjected to final cold rolling to obtain a final rolled strip foil having a thickness of 3.0mm and a cold rolling reduction of 20%. And finally, correcting the shape of the finally rolled strip foil in stretch bending straightening equipment, simultaneously baking the upper surface and the lower surface of the corrected strip foil through a baking device at the speed of 10m/min, and rolling after baking. The surface dyne value was found to be 40 dyn/cm.
Example 3
The brazing aluminum alloy material provided by the embodiment is formed by rolling and compounding a core material and a skin material. Wherein, the core is 3003MOD, includes: si: 0.6 wt%, Fe: 0.7 wt%, Cu: 0.05-0.2 wt%, Mn: 1.0-1.5 wt%, Zn: 0.1 wt%, the balance being Al and less than 0.15 wt% of unavoidable impurities.
The leather material is 4045 and comprises: si: 9-11 wt%, Fe: 0.8 wt%, Cu: 0.3 wt%, Mn: 0.05 wt%, Zn: 0.1 wt%, Ti: 0.2 wt%, Mg: 0.05 wt%, the balance being Al and less than 0.15 wt% of unavoidable impurities. The composite ratio of the leather materials on the two sides is respectively 20 percent;
the preparation process of the brazing aluminum alloy material comprises the following steps:
respectively putting 3003MOD and 4045 aluminum alloys into a smelting furnace for melting, and respectively preparing 3003MOD and 4045 cast ingots by adopting a semi-continuous casting method. 4045 is preheated at 550 deg.C for 2h, and then hot rolled.
And compounding 3003MOD and 4045 according to 4045, 3003MOD and 4045 from top to bottom to obtain the composite material. And heating the bundled composite material to 500 ℃, preserving heat for 6h for preheating, transferring to a hot rolling track for hot rolling, and performing hot rolling for multiple times until the thickness is 7mm to obtain a hot rolled plate strip. And after the hot rolled strip is cooled to the room temperature, carrying out multi-pass cold rolling on the hot rolled strip to obtain the cold rolled strip foil. And (3) carrying out recrystallization annealing on the cold-rolled strip foil in an annealing furnace at the temperature of 420 ℃, and keeping the temperature for 6h to obtain the O-state strip foil. The O-state strip foil obtained was subjected to final cold rolling to obtain a final rolled strip foil having a thickness of 2.0mm and a cold rolling reduction of 45%. And finally, correcting the shape of the finally rolled strip foil in stretch bending straightening equipment, simultaneously baking the upper surface and the lower surface of the corrected strip foil through a baking device at the speed of 50m/min, and rolling after baking. The surface dyne value was found to be 40 dyn/cm.
Comparative example 1
The brazing aluminum alloy material is formed by rolling and compounding a core material and a skin material. Wherein, the core is 3003MOD, includes: si: 0.6 wt%, Fe: 0.7 wt%, Cu: 0.05-0.2 wt%, Mn: 1.0-1.5 wt%, Zn: 0.1 wt%, the balance being Al and less than 0.15 wt% of unavoidable impurities.
The leather material is 4045 and comprises: si: 9-11 wt%, Fe: 0.8 wt%, Cu: 0.3 wt%, Mn: 0.05 wt%, Zn: 0.1 wt%, Ti: 0.2 wt%, Mg: 0.05 wt%, the balance being Al and less than 0.15 wt% of unavoidable impurities. The composite ratio of the leather materials at the two sides is 5 percent respectively;
the preparation process of the brazing aluminum alloy material comprises the following steps:
respectively putting 3003MOD and 4045 aluminum alloys into a smelting furnace for melting, and respectively preparing 3003MOD and 4045 cast ingots by adopting a semi-continuous casting method. 4045 is preheated to 450 ℃ for 10h, and then hot rolled.
And (3) laminating and compounding 3003MOD and 4045 in the sequence of 4045, 3003MOD and 4045 from top to bottom to obtain the composite material. Heating the composite material to 450 ℃, preserving heat for 10h for preheating, transferring the composite material to a hot rolling track for hot rolling, and obtaining a hot rolled plate strip after multiple hot rolling until the thickness is 10 mm. And after the hot rolled strip is cooled to the room temperature, carrying out multi-pass cold rolling on the hot rolled strip to obtain the cold rolled strip foil. And (3) carrying out recrystallization annealing on the cold-rolled strip foil in an annealing furnace at the temperature of 350 ℃, and keeping the temperature for 10 hours to obtain the O-state strip foil. The O-state strip foil obtained is subjected to final cold rolling to obtain a final rolled strip foil with the thickness of 0.4mm, and the cold rolling reduction is between 60%. And finally, correcting the shape of the finally rolled strip foil in a stretch bending straightening device and rolling. The surface dyne value is detected to be 24 dyn/cm.
Comparative example 2
The brazing aluminum alloy material is formed by rolling and compounding a core material and a skin material. Wherein, the core is 3003MOD, includes: si: 0.6 wt%, Fe: 0.7 wt%, Cu: 0.05-0.2 wt%, Mn: 1.0-1.5 wt%, Zn: 0.1 wt%, the balance being Al and less than 0.15 wt% of unavoidable impurities.
The leather material is 4045 and comprises: si: 9-11 wt%, Fe: 0.8 wt%, Cu: 0.3 wt%, Mn: 0.05 wt%, Zn: 0.1 wt%, Ti: 0.2 wt%, Mg: 0.05 wt%, the balance being Al and less than 0.15 wt% of unavoidable impurities. The composite ratio of the leather materials on the two sides is 15 percent respectively;
the preparation process of the brazing aluminum alloy material comprises the following steps:
respectively putting 3003MOD and 4045 aluminum alloys into a smelting furnace for melting, and respectively preparing 3003MOD and 4045 cast ingots by adopting a semi-continuous casting method. The 4045 is preheated to 500 ℃ and kept for 6 hours, and then hot rolling is carried out.
3003MOD and 4045 are stacked and compounded in the order of 4045, 3003MOD and 4045 from top to bottom to obtain the composite material. And heating the composite material to 550 ℃, preserving heat for 2h for preheating, transferring to a hot rolling track for hot rolling, and performing hot rolling for multiple times until the thickness is 5mm to obtain a hot rolled plate strip. And after the hot rolled strip is cooled to the room temperature, carrying out multi-pass cold rolling on the hot rolled strip to obtain the cold rolled strip foil. And (3) carrying out recrystallization annealing on the cold-rolled strip foil in an annealing furnace at the temperature of 500 ℃, and keeping the temperature for 2h to obtain the O-state strip foil. The O-state strip foil obtained is subjected to final cold rolling to obtain a final rolled strip foil with the thickness of 3.0mm, and the cold rolling reduction is between 20%. And finally, correcting the shape of the finally rolled strip foil in a stretch bending straightening device and rolling. The surface dyne value was found to be 26 dyn/cm.
The above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of protection of the present disclosure.
Finally, it should be noted that: although the present disclosure has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the disclosure. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. A preparation method of a brazing aluminum alloy material is characterized by comprising the following steps:
compounding materials: compounding the core material and the skin material to obtain a composite material;
hot rolling: preheating the composite material, and hot-rolling the preheated composite material to the thickness of 5-10 mm to obtain a hot-rolled plate strip;
intermediate rolling: carrying out intermediate cold rolling on the hot-rolled strip to obtain a cold-rolled strip foil;
intermediate annealing: carrying out recrystallization annealing on the cold-rolled strip foil to obtain an O-state strip foil;
and (3) finish rolling: carrying out final cold rolling on the O-state strip foil until the thickness is 0.4-3.0 mm, and obtaining a final rolled strip foil;
stretch bending and straightening: and correcting the final rolled strip foil, and baking the corrected strip foil through a baking device at a preset speed.
2. The method for preparing the brazing aluminum alloy material according to claim 1, wherein in the hot rolling, the preheating temperature of the composite material is 450-550 ℃, and the heat preservation time is 2-10 hours.
3. The method for producing a brazing aluminum alloy material according to claim 1, wherein in the intermediate rolling, the hot-rolled strip is subjected to intermediate cold rolling in a plurality of passes.
4. The method for preparing the brazing aluminum alloy material according to claim 1, wherein in the intermediate annealing, the annealing temperature of recrystallization annealing is 350 ℃ to 500 ℃, and the holding time is 2 to 10 hours.
5. The method for producing a brazing aluminum alloy material according to claim 1, wherein a cold rolling reduction in the finish rolling is 20 to 60%.
6. The method for producing a brazing aluminum alloy material according to claim 1, wherein in the stretch-bending straightening, the straightened strip foil is baked by a baking machine at a speed of 10 to 100 m/min.
7. The method for preparing the brazing aluminum alloy material according to claim 1, wherein in the material composition, the core material is 3003MOD aluminum alloy, and the skin material is 4045 aluminum alloy.
8. The method of producing a brazing aluminum alloy material according to claim 1, wherein before the material composition, the method comprises:
casting: respectively casting a core material ingot and a skin material ingot according to the components of the core material and the skin material, and taking the core material ingot as the core material;
rolling the skin material: and preheating the skin material cast ingot, and then carrying out hot rolling to obtain the skin material.
9. The preparation method of the brazing aluminum alloy material according to claim 8, wherein in the skin material rolling, the preheating temperature of the skin material ingot is 450-550 ℃, and the heat preservation time is 2-10 hours.
10. A brazing aluminum alloy material produced by the method according to any one of claims 1 to 9.
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Application publication date: 20200619 |