CN114134374A - 6-series aluminum alloy and preparation method thereof - Google Patents
6-series aluminum alloy and preparation method thereof Download PDFInfo
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- CN114134374A CN114134374A CN202111265461.8A CN202111265461A CN114134374A CN 114134374 A CN114134374 A CN 114134374A CN 202111265461 A CN202111265461 A CN 202111265461A CN 114134374 A CN114134374 A CN 114134374A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 112
- 238000002360 preparation method Methods 0.000 title claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 29
- 229910052802 copper Inorganic materials 0.000 claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims abstract description 16
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 12
- 230000032683 aging Effects 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 4
- -1 aluminum-manganese Chemical compound 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 19
- 238000003723 Smelting Methods 0.000 claims description 17
- 239000010949 copper Substances 0.000 claims description 15
- 239000011777 magnesium Substances 0.000 claims description 15
- 238000004080 punching Methods 0.000 claims description 13
- 229910000521 B alloy Inorganic materials 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 12
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 12
- 229910000914 Mn alloy Inorganic materials 0.000 claims description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 12
- QQHSIRTYSFLSRM-UHFFFAOYSA-N alumanylidynechromium Chemical compound [Al].[Cr] QQHSIRTYSFLSRM-UHFFFAOYSA-N 0.000 claims description 12
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 claims description 12
- 239000000788 chromium alloy Substances 0.000 claims description 12
- 239000010703 silicon Substances 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 9
- 238000010791 quenching Methods 0.000 claims description 8
- 230000000171 quenching effect Effects 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000000265 homogenisation Methods 0.000 claims description 5
- 238000004381 surface treatment Methods 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 6
- 239000006185 dispersion Substances 0.000 abstract description 3
- 238000012797 qualification Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 16
- 230000000149 penetrating effect Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000004321 preservation Methods 0.000 description 5
- 238000010008 shearing Methods 0.000 description 4
- 238000009503 electrostatic coating Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Classifications
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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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
-
- 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
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- 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
- C22F1/043—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 silicon as the next major constituent
-
- 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
- C22F1/047—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 magnesium as the next major constituent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention provides a 6-series aluminum alloy which comprises the following chemical components in percentage by mass: 0.37 to 0.47 percent of Si, 0.20 to 0.24 percent of Fe, 0.03 to 0.08 percent of Cu, 0.03 to 0.06 percent of Mn, 0.46 to 0.59 percent of Mg, 0.03 to 0.06 percent of Cr, 0.03 to 0.05 percent of Zn, 0.10 to 0.12 percent of Ti, less than or equal to 0.15 percent of total impurity content, less than or equal to 0.05 percent of single impurity content and the balance of Al. According to the invention, the growth of crystal grains can be effectively inhibited by optimizing the components of the 6-series aluminum alloy, so that the crystal grains of the aluminum alloy section are refined, the microstructure of the aluminum alloy is improved, and the control of the technological conditions of extrusion treatment and aging treatment is combined, so that the prepared 6-series aluminum alloy has stable chemical properties and a uniform dispersion state of the components, and is beneficial to obtaining the 6-series aluminum alloy with mechanical properties meeting the conditions used as a heat-insulation aluminum section, and the 6-series aluminum alloy has higher qualification rate in the processes of cogging treatment and rolling treatment, thereby reducing the production cost.
Description
Technical Field
The invention relates to the field of aluminum alloy preparation, and particularly relates to a 6-series aluminum alloy and a preparation method thereof.
Background
The aluminum alloy has the advantages of small density, good electrical conductivity, high thermal conductivity and corrosion resistance, so that the aluminum alloy is used as a structural material, the product weight can be greatly reduced, the structural stability is improved, the aluminum alloy is widely applied in production, when the aluminum alloy is used as a heat insulation aluminum profile, the traditional bridge-cut-off type heat insulation aluminum profile is generally composed of an A surface and a B surface, and the aluminum alloy is produced by extruding through a die.
In conclusion, the above-mentioned problems still remain to be solved in the field of preparing 6-series aluminum alloys.
Disclosure of Invention
Based on the above, in order to solve the problems that the 6-series aluminum alloy in the prior art is poor in mechanical property and is easy to crush and explode in the processes of tooth punching and extrusion, the invention provides a 6-series aluminum alloy, and the specific technical scheme is as follows:
a6-series aluminum alloy comprises the following chemical components in percentage by mass: 0.37 to 0.47 percent of Si, 0.20 to 0.24 percent of Fe, 0.03 to 0.08 percent of Cu, 0.03 to 0.06 percent of Mn, 0.46 to 0.59 percent of Mg, 0.03 to 0.06 percent of Cr, 0.03 to 0.05 percent of Zn, 0.10 to 0.12 percent of Ti, less than or equal to 0.15 percent of total impurity content, less than or equal to 0.05 percent of single impurity content and the balance of Al.
In addition, the invention also provides a preparation method of the 6-series aluminum alloy, which comprises the following steps:
preparing raw materials of an aluminum ingot, instant silicon, an aluminum-iron alloy, pure copper, an aluminum-manganese alloy, a magnesium ingot, an aluminum-chromium alloy, a zinc ingot and an aluminum-titanium-boron alloy;
placing the aluminum ingot in a smelting furnace at 700-750 ℃ for smelting, then adding instant silicon, aluminum-iron alloy, pure copper, aluminum-manganese alloy, magnesium ingot, aluminum-chromium alloy, zinc ingot and aluminum-titanium-boron alloy, and smelting for 5-7 h;
carrying out casting treatment to obtain an aluminum alloy ingot, and then carrying out homogenization treatment and extrusion treatment on the aluminum alloy ingot at the temperature of 420-500 ℃;
quenching the extruded aluminum alloy cast ingot, wherein the quenching treatment is air cooling, and the cooling rate is more than or equal to 5 ℃/S;
and (3) carrying out aging treatment on the aluminum alloy cast ingot, discharging and cooling to room temperature to obtain the 6-series aluminum alloy.
Further, the 6-series aluminum alloy is applied to preparation of the heat-insulating aluminum profile after surface treatment and solidification control, tooth punching treatment, rolling treatment and strip penetrating treatment.
Furthermore, after the 6-series aluminum alloy is subjected to tooth punching treatment, the tooth punching depth is 0.5mm-0.7 mm.
Further, the rolling reduction of the 6 series aluminum alloy is 1.8mm-2.0mm after rolling treatment.
Further, the speed of the fusion casting treatment is 35mm/min-40 mm/min.
Further, the homogenization treatment is to keep the temperature of the aluminum alloy ingot at 500-530 ℃ for 8-12 h.
Further, the die temperature of the extrusion treatment is 380-460 ℃.
Further, the outlet temperature of the extrusion process is 550 ℃ to 650 ℃.
Further, the aging treatment is to place the aluminum alloy ingot at 165-175 ℃ and keep the temperature for 2-3 h.
In the scheme, the growth of crystal grains can be effectively inhibited by optimizing the components of the 6-series aluminum alloy, so that the crystal grains of the aluminum alloy section are refined, the microstructure of the aluminum alloy is improved, and the process condition control of extrusion treatment and aging treatment is combined, so that the prepared 6-series aluminum alloy has stable chemical properties, the components are in a uniform dispersion state, the 6-series aluminum alloy with mechanical properties meeting the conditions used as a heat-insulating aluminum section is favorably obtained, and the 6-series aluminum alloy has higher qualification rate in the process of cogging treatment and rolling treatment, and further the production cost is reduced.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The 6-series aluminum alloy in one embodiment of the invention comprises the following chemical components in percentage by mass: 0.37 to 0.47 percent of Si, 0.20 to 0.24 percent of Fe, 0.03 to 0.08 percent of Cu, 0.03 to 0.06 percent of Mn, 0.46 to 0.59 percent of Mg, 0.03 to 0.06 percent of Cr, 0.03 to 0.05 percent of Zn, 0.10 to 0.12 percent of Ti, less than or equal to 0.15 percent of total impurity content, less than or equal to 0.05 percent of single impurity content and the balance of Al.
In addition, the invention also provides a preparation method of the 6-series aluminum alloy, which comprises the following steps:
preparing raw materials of an aluminum ingot, instant silicon, an aluminum-iron alloy, pure copper, an aluminum-manganese alloy, a magnesium ingot, an aluminum-chromium alloy, a zinc ingot and an aluminum-titanium-boron alloy;
placing the aluminum ingot in a smelting furnace at 700-750 ℃ for smelting, then adding instant silicon, aluminum-iron alloy, pure copper, aluminum-manganese alloy, magnesium ingot, aluminum-chromium alloy, zinc ingot and aluminum-titanium-boron alloy, and smelting for 5-7 h;
carrying out casting treatment to obtain an aluminum alloy ingot, and then carrying out homogenization treatment and extrusion treatment on the aluminum alloy ingot at the temperature of 420-500 ℃;
quenching the extruded aluminum alloy cast ingot, wherein the quenching treatment is air cooling, and the cooling rate is more than or equal to 5 ℃/S;
and (3) carrying out aging treatment on the aluminum alloy cast ingot, discharging and cooling to room temperature to obtain the 6-series aluminum alloy.
In one embodiment, the 6-series aluminum alloy is subjected to surface treatment curing control, tooth punching treatment, rolling treatment and strip penetrating treatment and then applied to preparation of the heat-insulating aluminum profile.
In one embodiment, the surface treatment curing is controlled by performing electrostatic coating on the surface of the 6-series aluminum alloy and then curing at 210-230 ℃ for 10-20 min.
In one embodiment, the 6-series aluminum alloy is subjected to tooth punching treatment, and the tooth punching depth is 0.5mm-0.7 mm.
In one embodiment, the reduction amount of the 6-series aluminum alloy after rolling treatment is 1.8mm-2.0 mm.
In one embodiment, the heat-insulating aluminum profile comprises an A surface and a B surface.
In one embodiment, the penetrating strip is processed by penetrating an insulation strip after laminating the A surface and the B surface.
In one embodiment, the speed of the fusion casting process is 35mm/min-40 mm/min.
In one embodiment, the homogenization treatment is to keep the temperature of the aluminum alloy ingot at 500-530 ℃ for 8-12 h.
In one embodiment, the die temperature of the extrusion process is 380 ℃ to 460 ℃.
In one embodiment, the exit temperature of the extrusion process is 550 ℃ to 650 ℃.
In one embodiment, the aging treatment is to place the aluminum alloy ingot at 165-175 ℃ for 2-3 h.
In the scheme, the growth of crystal grains can be effectively inhibited by optimizing the components of the 6-series aluminum alloy, so that the crystal grains of the aluminum alloy section are refined, the microstructure of the aluminum alloy is improved, and the process condition control of extrusion treatment, quenching treatment and aging treatment is combined, so that the prepared 6-series aluminum alloy has stable chemical properties, the components are in a uniform dispersion state, the 6-series aluminum alloy with mechanical properties meeting the conditions used as a heat-insulating aluminum section is favorably obtained, and the 6-series aluminum alloy has higher qualification rate in the process of cogging treatment and rolling treatment, and further reduces the production cost.
Embodiments of the present invention will be described in detail below with reference to specific examples.
Example 1:
a preparation method of a 6-series aluminum alloy comprises the following steps:
preparing raw materials of an aluminum ingot, instant silicon, an aluminum-iron alloy, pure copper, an aluminum-manganese alloy, a magnesium ingot, an aluminum-chromium alloy, a zinc ingot and an aluminum-titanium-boron alloy;
placing the aluminum ingot in a smelting furnace at 700 ℃ for melting, then adding instant silicon, aluminum-iron alloy, pure copper, aluminum-manganese alloy, magnesium ingot, aluminum-chromium alloy, zinc ingot and aluminum-titanium-boron alloy, and smelting for 5h-7 h;
performing fusion casting treatment at the speed of 35mm/min to obtain an aluminum alloy cast ingot, then preserving heat at 530 ℃ for 8h, keeping the temperature of the aluminum alloy cast ingot at 420 ℃, and performing extrusion treatment under the conditions that the mold temperature is 380 ℃ and the outlet temperature is 550 ℃;
air cooling the extruded aluminum alloy cast ingot at a cooling rate of 5 ℃/S;
and (3) placing the aluminum alloy ingot at 165 ℃ for heat preservation for 3h, discharging and cooling to room temperature to obtain the 6-series aluminum alloy.
Example 2:
a preparation method of a 6-series aluminum alloy comprises the following steps:
preparing raw materials of an aluminum ingot, instant silicon, an aluminum-iron alloy, pure copper, an aluminum-manganese alloy, a magnesium ingot, an aluminum-chromium alloy, a zinc ingot and an aluminum-titanium-boron alloy;
placing the aluminum ingot in a smelting furnace at 750 ℃ for smelting, then adding instant silicon, aluminum-iron alloy, pure copper, aluminum-manganese alloy, magnesium ingot, aluminum-chromium alloy, zinc ingot and aluminum-titanium-boron alloy, and smelting for 7 hours;
performing fusion casting treatment at the speed of 40mm/min to obtain an aluminum alloy cast ingot, then preserving heat at 530 ℃ for 8h, keeping the temperature of the aluminum alloy cast ingot at 420 ℃, and performing extrusion treatment under the conditions that the mold temperature is 380 ℃ and the outlet temperature is 550 ℃;
air cooling the extruded aluminum alloy cast ingot at a cooling rate of 8 ℃/S;
and (3) placing the aluminum alloy ingot at 175 ℃ for heat preservation for 3h, discharging and cooling to room temperature to obtain the 6-series aluminum alloy.
Example 3:
a preparation method of a 6-series aluminum alloy comprises the following steps:
preparing raw materials of an aluminum ingot, instant silicon, an aluminum-iron alloy, pure copper, an aluminum-manganese alloy, a magnesium ingot, an aluminum-chromium alloy, a zinc ingot and an aluminum-titanium-boron alloy;
placing the aluminum ingot in a smelting furnace at 720 ℃ for smelting, then adding instant silicon, aluminum-iron alloy, pure copper, aluminum-manganese alloy, magnesium ingot, aluminum-chromium alloy, zinc ingot and aluminum-titanium-boron alloy, and smelting for 6 hours;
performing fusion casting treatment at the speed of 40mm/min to obtain an aluminum alloy cast ingot, then preserving heat at 530 ℃ for 10h, keeping the temperature of the aluminum alloy cast ingot at 480 ℃, and performing extrusion treatment under the conditions that the mold temperature is 420 ℃ and the outlet temperature is 600 ℃;
air cooling the extruded aluminum alloy cast ingot at a cooling rate of 10 ℃/S;
and (3) placing the aluminum alloy ingot at 175 ℃ for heat preservation for 3h, discharging and cooling to room temperature to obtain the 6-series aluminum alloy.
Example 4:
the composition was different from that of example 3 only, and the others were the same as those of example 3.
Example 5:
the chemical composition is different from that of example 3, and the other steps are the same as those of example 3
The chemical compositions of the 6-series aluminum alloys prepared in examples 1 to 5 in terms of mass percent are shown in table 1 below.
Table 1:
comparative examples 1 to 3:
the difference from example 1 was only in chemical composition, and the other examples were the same as example 1, and the chemical compositions of the 6-series aluminum alloys of comparative examples 1 to 3 were as shown in table 2 below.
Table 2:
comparative example 4:
comparative example 4 differs from example 1 in that: the quenching treatment adopts air cooling directly.
Comparative example 5:
comparative example 5 differs from example 1 in that: the aging treatment is heat preservation for 3 hours at 200 ℃.
Comparative example 6:
comparative example 6 differs from example 1 in that: the aging treatment is heat preservation for 3 hours at 150 ℃.
Mechanical property analysis was performed on the 6-series aluminum alloys prepared in examples 1 to 3 and the 6-series aluminum alloys prepared in comparative examples 1 to 6, and the results are shown in table 3 below.
The tensile test was carried out on the aluminum alloy according to GB/T228-. And measuring the yield strength, the tensile strength and the elongation percentage.
Table 3:
as shown in the analysis of Table 3, the 6-series aluminum alloy which simultaneously satisfies the conditions of yield strength of 205MPa-211MPa, tensile strength of 236MPa-241 and elongation of 13.2% -13.5% can be obtained by optimizing the components and the preparation process of the 6-series aluminum alloy, the chemical components and the content of the 6-series aluminum alloy are changed in comparative examples 1-3, the mechanical property of the 6-series aluminum alloy is obviously different from that of example 1, and the mechanical property of the 6-series aluminum alloy is obviously different from that of example 1 by changing the preparation process of the 6-series aluminum alloy in comparative examples 4-6.
Application examples 1 to 3:
the 6-series aluminum alloy prepared in the examples 1 to 3 is respectively applied to the preparation of heat insulation aluminum profiles, and specifically comprises the following steps:
and (3) respectively carrying out electrostatic coating on the surfaces of the 6-series aluminum alloys prepared in the examples 1-3, then curing for 15min at 220 ℃, and then carrying out tooth punching treatment, rolling treatment and strip penetrating treatment to obtain the heat-insulating aluminum profile, wherein the tooth punching depth is 0.5mm-0.7mm, and the rolling reduction is 1.8mm-2.0 mm.
Comparative application examples 1 to 6:
the 6 series aluminum alloys prepared in comparative examples 1 to 6 are respectively applied to the preparation of heat insulation aluminum profiles, and specifically comprise the following components:
and (3) respectively carrying out electrostatic coating on the surfaces of the 6-series aluminum alloys prepared in the comparative examples 1-6, then curing for 15min at 220 ℃, and then carrying out tooth punching treatment, rolling treatment and strip penetrating treatment to obtain the heat-insulating aluminum profile, wherein the tooth punching depth is 0.5mm-0.7mm, and the rolling reduction is 1.8mm-2.0 mm.
The production conditions and the shearing performance of the heat-insulating aluminum profiles prepared in the application examples 1-3 and the heat-insulating aluminum profiles prepared in the comparative application examples 1-6 are recorded, wherein the compression explosion conditions are reflected by the high-temperature longitudinal shearing characteristic value in GB/T5237-2017 aluminum alloy building profile part 6 according to the proportion and the high-temperature shearing performance of 100 profiles produced in each case, and the results are shown in the following table 4.
Table 4:
as can be seen from application examples 1-3 and comparative application examples in Table 4, the 6-series aluminum alloy prepared by the invention can simultaneously meet the yield strength, tensile strength and elongation rate of the heat-insulating aluminum profile, and ensures that the pressure explosion condition is zero in the processes of cogging treatment and rolling treatment, thereby being beneficial to reducing the production cost and having positive popularization significance. In addition, the high-temperature shearing performance of the 6-series aluminum alloy prepared by the method meets the requirement of heat-insulating aluminum profile preparation, and the quality of products is ensured.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A6-series aluminum alloy is characterized by comprising the following chemical components in percentage by mass: 0.37 to 0.47 percent of Si, 0.20 to 0.24 percent of Fe, 0.03 to 0.08 percent of Cu, 0.03 to 0.06 percent of Mn, 0.46 to 0.59 percent of Mg, 0.03 to 0.06 percent of Cr, 0.03 to 0.05 percent of Zn, 0.10 to 0.12 percent of Ti, less than or equal to 0.15 percent of total impurity content, less than or equal to 0.05 percent of single impurity content and the balance of Al.
2. The method of producing the 6-series aluminum alloy according to claim 1, comprising the steps of:
preparing raw materials of an aluminum ingot, instant silicon, an aluminum-iron alloy, pure copper, an aluminum-manganese alloy, a magnesium ingot, an aluminum-chromium alloy, a zinc ingot and an aluminum-titanium-boron alloy;
placing the aluminum ingot in a smelting furnace at 700-750 ℃ for smelting, then adding instant silicon, aluminum-iron alloy, pure copper, aluminum-manganese alloy, magnesium ingot, aluminum-chromium alloy, zinc ingot and aluminum-titanium-boron alloy, and smelting for 5-7 h;
carrying out casting treatment to obtain an aluminum alloy ingot, and then carrying out homogenization treatment and extrusion treatment on the aluminum alloy ingot at the temperature of 420-500 ℃;
quenching the extruded aluminum alloy cast ingot, wherein the quenching treatment is air cooling, and the cooling rate is more than or equal to 5 ℃/S;
and (3) carrying out aging treatment on the aluminum alloy cast ingot, discharging and cooling to room temperature to obtain the 6-series aluminum alloy.
3. The method for preparing the 6-series aluminum alloy according to claim 2, wherein the 6-series aluminum alloy is subjected to surface treatment and solidification control, tooth punching treatment, rolling treatment and strip threading treatment and then applied to preparation of the heat-insulating aluminum profile.
4. The method for producing a 6-series aluminum alloy according to claim 3, wherein the 6-series aluminum alloy is subjected to a tooth punching treatment to form teeth with a depth of 0.5mm to 0.7 mm.
5. The method for producing a 6-series aluminum alloy according to claim 3, wherein the rolling reduction of the 6-series aluminum alloy is 1.8mm to 2.0 mm.
6. The method for producing a 6-series aluminum alloy according to claim 2, wherein the speed of the fusion casting process is 35mm/min to 40 mm/min.
7. The method for preparing the 6-series aluminum alloy according to claim 2, wherein the homogenizing treatment is to keep the temperature of the aluminum alloy ingot at 500-530 ℃ for 8-12 h.
8. The method for producing a 6-series aluminum alloy according to claim 2, wherein the die temperature of the extrusion treatment is 380 ℃ to 460 ℃.
9. The method for producing a 6-series aluminum alloy according to claim 8, wherein the extrusion treatment has an outlet temperature of 550 ℃ to 650 ℃.
10. The preparation method of the 6-series aluminum alloy according to claim 2, wherein the aging treatment is to keep the aluminum alloy ingot at 165-175 ℃ for 2-3 h.
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| CN202111265461.8A CN114134374A (en) | 2021-10-28 | 2021-10-28 | 6-series aluminum alloy and preparation method thereof |
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| CN114602992A (en) * | 2022-03-10 | 2022-06-10 | 佛山市三水凤铝铝业有限公司 | Preparation method of aluminum alloy section for doors and windows |
| CN114672706A (en) * | 2022-04-13 | 2022-06-28 | 台州市金美铝业股份有限公司 | High-conductivity aluminum alloy and production process thereof |
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