CN114602992A - Preparation method of aluminum alloy section for doors and windows - Google Patents
Preparation method of aluminum alloy section for doors and windows Download PDFInfo
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- CN114602992A CN114602992A CN202210233630.8A CN202210233630A CN114602992A CN 114602992 A CN114602992 A CN 114602992A CN 202210233630 A CN202210233630 A CN 202210233630A CN 114602992 A CN114602992 A CN 114602992A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 83
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000011282 treatment Methods 0.000 claims abstract description 62
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000001192 hot extrusion Methods 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000003723 Smelting Methods 0.000 claims description 22
- 238000001125 extrusion Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- -1 aluminum-manganese Chemical compound 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 8
- 238000010791 quenching Methods 0.000 claims description 8
- 230000000171 quenching effect Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000009749 continuous casting Methods 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 229910000521 B alloy Inorganic materials 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 4
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 229910000914 Mn alloy Inorganic materials 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 4
- QQHSIRTYSFLSRM-UHFFFAOYSA-N alumanylidynechromium Chemical compound [Al].[Cr] QQHSIRTYSFLSRM-UHFFFAOYSA-N 0.000 claims description 4
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 claims description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 4
- 239000000788 chromium alloy Substances 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 4
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 4
- 239000011572 manganese Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000002068 genetic effect Effects 0.000 abstract description 4
- 238000009957 hemming Methods 0.000 abstract description 4
- 230000032683 aging Effects 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- 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
- C22C21/06—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
- 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
- C22F1/047—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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention discloses a preparation method of an aluminum alloy section for doors and windows, which comprises the steps of preparing molten metal, carrying out hot extrusion treatment to obtain an aluminum alloy section A, carrying out pretreatment, spraying treatment and curing treatment, wherein the addition content of alloy element components is optimized and the aluminum alloy section for doors and windows with high tensile strength and good yield strength is prepared under the optimized preparation process condition; the pretreated aluminum alloy section A has a smooth surface and good performance, and is beneficial to subsequent curing treatment, so that the surface of the aluminum alloy section A is combined with the coating more firmly, the genetic effect of the microstructure of the aluminum alloy section can be reduced by parameter setting of the subsequent curing treatment, the stamping formability and the hemming processability can be improved, and the production quality of the aluminum section for doors and windows can be further ensured.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy preparation, and particularly relates to a preparation method of an aluminum alloy section for doors and windows.
Background
The existing aluminum alloy section for doors and windows generally adopts a 6063 alloy T5 state, the artificial aging process industry in the state generally keeps the temperature at 210 ℃ for 2-4 hours in 180-plus-material mode, the consumption of natural gas of the section is 8-12 square/ton, the extruded and quenched section needs to be transferred to an aging furnace for aging to obtain the mechanical property specified by the national standard GB/T5237, the section is taken out of the furnace and cooled to room temperature after the aging is completed, the whole artificial aging process comprises the processes of material transfer, artificial aging, taken out of the furnace and cooling and the like for more than 12 hours, and then the section is transferred to a spraying workshop for surface treatment (keeping the temperature at 200 +/-5 ℃ for 20-50 minutes) to obtain the color required by customers and meeting the coating property specified by the national standard GB/T5237. The process of obtaining national standard performance by artificial aging of the existing process route and the curing process of the sprayed section bar are both required to be heated and insulated, but the two processes are separated, so that the energy consumption and the turnover time of the section bar in the whole production process are greatly increased. In addition, in the prior art, the aluminum alloy section for doors and windows is prepared by electrolyzing aluminum liquid, and the microstructure of the aluminum alloy section has certain genetic effect, so that the stamping formability and the hemming processability are deteriorated, and the quality of the product is seriously influenced.
In summary, the above problems still remain to be solved in the field of preparing aluminum alloy sections for doors and windows.
Disclosure of Invention
Aiming at one of the existing problems, the invention provides a preparation method of an aluminum alloy section for doors and windows, and plasticity and mechanical property can meet the use requirements of the doors and windows by optimizing the component proportion and the preparation process of the alloy.
In order to achieve the purpose, the invention provides the following technical scheme:
a preparation method of an aluminum alloy section for doors and windows comprises the following steps:
adding an aluminum ingot into a smelting furnace, smelting in the smelting furnace at 720-740 ℃, 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 carrying out smelting treatment to obtain molten metal;
performing semi-continuous casting on the molten metal to obtain an aluminum alloy cast rod, and then performing hot extrusion treatment and online quenching treatment to obtain an aluminum alloy profile A;
carrying out pretreatment, spraying treatment and curing treatment on the aluminum alloy section A to obtain an aluminum alloy section for doors and windows;
wherein the hot extrusion treatment comprises the following steps: preheating the aluminum alloy cast rod to 560-580 ℃ for 5-8 min, then cooling to 420-440 ℃, and sending the aluminum alloy cast rod into an extrusion die for extrusion forming;
the curing treatment comprises the following steps: heating the sprayed aluminum alloy section A to 210-240 ℃, and preserving heat for 20-50 min.
Furthermore, the temperature of the smelting treatment is 690-750 ℃, and the time of the smelting treatment is 5-7 h.
Further, the casting speed of the semi-continuous casting is 80mm/min-150mm/min, and the casting temperature is 700 ℃ to 730 ℃.
Further, the on-line quenching treatment is water cooling.
Further, the pretreatment is to place the aluminum alloy section A in pretreatment liquid, soak for 1min-3min, dry under the condition of hot air after water-based.
Further, the spraying treatment is to perform electrostatic powder coating spraying treatment on the aluminum alloy section A after pretreatment.
Further, the pretreatment liquid comprises sodium hydroxide, titanium oxide and sodium carboxymethylcellulose in a mass ratio of 1-5:3-7: 1-6.
Further, the curing treatment is as follows: heating the sprayed aluminum alloy section A to 225-235 ℃, and preserving heat for 25-35 min
Further, the outlet temperature of the extrusion forming is 350-360 ℃, and the preheating temperature of the extrusion die is 340-380 ℃.
Further, the aluminum alloy profile comprises the following chemical components in percentage by mass: 0.40 to 0.45 percent of Si, 0.01 to 0.02 percent of Fe, 0.01 to 0.03 percent of Cu, 0.01 to 0.04 percent of Mn, 0.50 to 0.55 percent of Mg, 0.01 to 0.04 percent of Cr0.01 to 0.04 percent of Zn, 0.11 to 0.15 percent of Ti, 0.01 to 0.05 percent of Zr, less than or equal to 0.15 percent of total amount of impurities, less than 0.05 percent of single impurity content and the balance of Al.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the addition content of alloy element components is optimally designed, and the aluminum alloy section for doors and windows with high tensile strength and good yield strength is prepared under the optimized preparation process conditions; the pretreated aluminum alloy section A has a smooth surface and good performance, and is beneficial to subsequent curing treatment, so that the surface of the aluminum alloy section A is combined with the coating more firmly, the genetic effect of the microstructure of the aluminum alloy section can be reduced by parameter setting of the subsequent curing treatment, the stamping formability and the hemming processability can be improved, and the production quality of the aluminum section for doors and windows can be further ensured.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the following specific examples, but the scope of the present invention is not limited thereto.
The preparation method of the aluminum alloy section for the door and the window in the embodiment of the invention comprises the following steps:
adding an aluminum ingot into a smelting furnace, smelting in the smelting furnace at 720-740 ℃, 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 carrying out smelting treatment to obtain molten metal;
performing semi-continuous casting on the molten metal to obtain an aluminum alloy casting bar, and then performing hot extrusion treatment and online quenching treatment to obtain an aluminum alloy section A;
carrying out pretreatment, spraying treatment and curing treatment on the aluminum alloy section A to obtain an aluminum alloy section for doors and windows;
wherein the hot extrusion treatment comprises the following steps: preheating the aluminum alloy cast rod to 560-580 ℃ for 5-8 min, then cooling to 420-440 ℃, and sending the aluminum alloy cast rod into an extrusion die for extrusion forming;
the curing treatment comprises the following steps: heating the sprayed aluminum alloy section A to 210-240 ℃, and preserving heat for 20-50 min.
In one embodiment, the temperature of the smelting treatment is 690-750 ℃, and the time of the smelting treatment is 5-7 h.
In one embodiment, the casting speed of the semi-continuous casting is 80mm/min-150mm/min, and the casting temperature is 700 ℃ to 730 ℃.
In one embodiment, the in-line quenching process is water cooling.
In one embodiment, the pretreatment is to place the aluminum alloy section A in a pretreatment liquid, soak for 1min to 3min, dry under hot air after water-based treatment.
In one embodiment, the spraying treatment is to perform electrostatic powder coating spraying treatment on the aluminum alloy section A after pretreatment.
In one embodiment, the pretreatment liquid comprises sodium hydroxide, titanium oxide and sodium carboxymethyl cellulose in a mass ratio of 1-5:3-7: 1-6.
In one embodiment, the curing process is: heating the sprayed aluminum alloy section A to 225-235 ℃, and preserving heat for 25-35 min
In one embodiment, the outlet temperature of the extrusion forming is 550-560 ℃, and the preheating temperature of the extrusion die is 380-480 ℃.
In one embodiment, the aluminum alloy profile comprises the following chemical components in percentage by mass: 0.40 to 0.45 percent of Si, 0.01 to 0.02 percent of Fe, 0.01 to 0.03 percent of Cu, 0.01 to 0.04 percent of Mn, 0.50 to 0.55 percent of Mg, 0.01 to 0.04 percent of Cr, 0.02 to 0.04 percent of Zn, 0.11 to 0.15 percent of Ti, 0.01 to 0.05 percent of Zr, less than or equal to 0.15 percent of total impurity content, less than 0.05 percent of single impurity content and the balance of Al.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the addition content of alloy element components is optimized, and the aluminum alloy section for doors and windows with high tensile strength and good yield strength is prepared under the optimized preparation process conditions, the parameters of extrusion treatment and curing treatment are optimized, the artificial aging process is omitted, the quenching process is short, the process is simplified, and the labor cost is reduced; the pretreated aluminum alloy section A has a smooth surface and good performance, and is beneficial to subsequent curing treatment, so that the surface of the aluminum alloy section A is combined with the coating more firmly, the genetic effect of the microstructure of the aluminum alloy section can be reduced by parameter setting of the subsequent curing treatment, the stamping formability and the hemming processability can be improved, and the production quality of the aluminum section for doors and windows can be further ensured.
The following examples 1-3 and comparative examples 1-2 are selected, and the components in percentage by mass are shown in the following table 1:
TABLE 1
The aluminum alloy sections for doors and windows of examples 1 to 3 and the aluminum alloy sections for doors and windows of comparative examples 1 to 2 were prepared by the following steps:
adding an aluminum ingot into a smelting furnace, smelting in the smelting furnace at 740 ℃, 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 at-750 ℃ for 7 hours to obtain molten metal;
performing semi-continuous casting on the molten metal at the casting speed of 30m/min at the temperature of 730 ℃ to obtain an aluminum alloy cast rod, preheating the aluminum alloy cast rod to 570 ℃, wherein the preheating time is 6min, then cooling to 430 ℃, sending the aluminum alloy cast rod to an extrusion die for extrusion molding, wherein the outlet temperature of the extrusion molding is 570 ℃, the preheating temperature of the extrusion die is 430 ℃, and performing water cooling to obtain an aluminum alloy section A;
mixing sodium hydroxide, titanium oxide and sodium carboxymethylcellulose in a mass ratio of 5:7:5, and uniformly stirring according to a material-liquid ratio of 1:35 to obtain a pretreatment liquid for later use;
and placing the aluminum alloy section A in the pretreatment liquid, soaking for 3min, drying under a hot air condition after water-based treatment, spraying, heating to 240 ℃, and preserving heat for 30min to obtain the aluminum alloy section for doors and windows.
Mechanical properties of the aluminum profiles for doors and windows prepared in examples 1 to 3 and the aluminum profiles for doors and windows prepared in comparative examples 1 to 2 were analyzed, and the results are shown in table 2 below.
Table 2:
from the analysis in table 2, it can be seen that the aluminum alloy for doors and windows of the present application still has excellent mechanical properties after the aging treatment process is omitted, and the surface state of the coating is uniform under the curing treatment parameter conditions, so that the aluminum alloy profile for composite doors and windows can be obtained as a whole.
In order to study the influence of the hot extrusion treatment parameters and the curing treatment parameters on the mechanical properties of the aluminum profiles for doors and windows, the following tests were also performed, and the specific conditions and results are shown in table 3 below.
Table 3:
as can be seen from the data analysis in Table 3, after the technological parameters of the hot extrusion treatment and the curing treatment are optimized, the aluminum alloy section with excellent mechanical properties can be obtained under the condition of omitting the aging treatment step, the tensile strength, the yield strength and the tensile rate of the aluminum alloy section can be influenced by the change of the technological parameters, and the state of the coating can also be influenced by the overhigh curing treatment parameters, so that the aluminum alloy section suitable for doors and windows can be obtained under the condition of the technological parameters.
In addition, the area ratio of the grain boundary phase before the hot extrusion treatment of the aluminum alloy profile for doors and windows prepared in example 1 is 20.9% as measured by image pro plus (ipp), the number of eutectic phases on the grain boundary after the hot extrusion treatment is obviously reduced, the area ratio of the grain boundary residual phase is 5.2% as measured, and after the solidification treatment, the area ratio of the grain boundary residual phase is 4.5% as measured, so that the grain boundary residue is less, the number of eutectic phases on the grain boundary is obviously reduced, and the grain boundary is narrowed.
In conclusion, the invention improves the comprehensive performance of the alloy by adding trace elements, optimizing the proportion of strengthening phase components, optimizing the quenching process and the aging mode, prepares the aluminum alloy with high extrusion property, high plasticity and excellent cutting performance, has high production efficiency and environmental protection, and meets the requirements of the European Union on for easy-cutting materials.
The foregoing examples are illustrative of embodiments of the present invention only and are not intended to be limiting in any way; those skilled in the art can make various changes and modifications to the disclosed technology, which are equivalent to those of the embodiments of the present invention, and it is within the scope of the present invention to make various changes and modifications of the invention based on the technical spirit of the present invention.
Claims (10)
1. The preparation method of the aluminum alloy section for doors and windows is characterized by comprising the following steps:
adding an aluminum ingot into a smelting furnace, smelting in the smelting furnace at 720-740 ℃, 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 carrying out smelting treatment to obtain molten metal;
performing semi-continuous casting on the molten metal to obtain an aluminum alloy cast rod, and then performing hot extrusion treatment and online quenching treatment to obtain an aluminum alloy profile A;
carrying out pretreatment, spraying treatment and curing treatment on the aluminum alloy section A to obtain an aluminum alloy section for doors and windows;
wherein the hot extrusion treatment comprises the following steps: preheating the aluminum alloy cast rod to 560-580 ℃ for 5-8 min, then cooling to 420-440 ℃, and sending the aluminum alloy cast rod into an extrusion die for extrusion forming;
the curing treatment comprises the following steps: heating the sprayed aluminum alloy section A to 210-240 ℃, and preserving heat for 20-50 min.
2. The preparation method of the aluminum alloy profile for doors and windows according to claim 1, wherein the temperature of the smelting treatment is 690-750 ℃, and the time of the smelting treatment is 5-7 h.
3. The method for preparing an aluminum alloy profile for doors and windows according to claim 1, wherein the casting speed of the semi-continuous casting is 80mm/min to 150mm/min, and the casting temperature is 700 ℃ to 730 ℃.
4. The preparation method of the aluminum alloy section for doors and windows according to claim 1, wherein the on-line quenching treatment is water cooling.
5. The method for preparing an aluminum alloy profile for doors and windows according to claim 1, wherein the pretreatment is to place the aluminum alloy profile A in a pretreatment solution, soak for 1min to 3min, dry under hot air after water-based treatment.
6. The method for preparing an aluminum alloy profile for doors and windows according to claim 5, wherein the spraying treatment is electrostatic powder coating spraying treatment on the aluminum alloy profile A after pretreatment.
7. The method for preparing the aluminum alloy profile for doors and windows according to claim 6, wherein the pretreatment liquid comprises sodium hydroxide, titanium oxide and sodium carboxymethyl cellulose in a mass ratio of 1-5:3-7: 1-6.
8. The method for preparing an aluminum alloy profile for doors and windows according to claim 1, wherein the curing treatment is: heating the sprayed aluminum alloy section A to 225-235 ℃, and preserving heat for 25-35 min.
9. The method for preparing an aluminum alloy profile for doors and windows according to claim 1, wherein the outlet temperature of the extrusion molding is 550 ℃ to 560 ℃, and the preheating temperature of the extrusion die is 380 ℃ to 480 ℃.
10. The method for preparing the aluminum alloy section bar for the doors and windows according to any one of claims 1 to 9, wherein the aluminum alloy section bar comprises the following chemical components in percentage by mass: 0.40-0.45% of Si, 0.01-0.02% of Fe0.01-0.03% of Cu, 0.01-0.04% of Mn, 0.50-0.55% of Mg, 0.01-0.04% of Cr0.01-0.04% of Zn, 0.11-0.15% of Ti, 0.01-0.05% of Zr, less than or equal to 0.15% of total impurities, less than 0.05% of single impurity content and the balance of Al.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210233630.8A CN114602992A (en) | 2022-03-10 | 2022-03-10 | Preparation method of aluminum alloy section for doors and windows |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210233630.8A CN114602992A (en) | 2022-03-10 | 2022-03-10 | Preparation method of aluminum alloy section for doors and windows |
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| CN114602992A true CN114602992A (en) | 2022-06-10 |
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