CN111575513A - Aluminum alloy strip, preparation method thereof and aluminum division bar for hollow glass - Google Patents
Aluminum alloy strip, preparation method thereof and aluminum division bar for hollow glass Download PDFInfo
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- CN111575513A CN111575513A CN202010532873.2A CN202010532873A CN111575513A CN 111575513 A CN111575513 A CN 111575513A CN 202010532873 A CN202010532873 A CN 202010532873A CN 111575513 A CN111575513 A CN 111575513A
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- 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
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- 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
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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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- 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
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
- E06B3/663—Elements for spacing panes
Abstract
The invention relates to the technical field of aluminum alloy strips, and discloses an aluminum alloy strip, a preparation method thereof and an aluminum parting strip for hollow glass. The method comprises the following steps: (1) preparing materials according to the components and weight percentage of the aluminum alloy, adding the raw material without titanium element into a smelting furnace for melting and heating, and then sequentially carrying out primary refining, primary deslagging, stirring, analyzing and adjusting the components to obtain aluminum liquid; (2) transferring the aluminum liquid to a standing furnace, sequentially carrying out standing, secondary refining, degassing and secondary deslagging, then adding a titanium-containing raw material, and then casting and rolling into a plate blank; (3) rolling the plate blank to a preset thickness in multiple passes, rewinding and trimming under the preset thickness, continuously rolling to the thickness of a finished product, and then sequentially carrying out low-temperature stress relief annealing, stretch bending straightening and shearing. The aluminum alloy strip prepared by the method has higher strength and higher corrosion resistance under the same thickness, and is suitable for the complex working environment of hollow glass.
Description
Technical Field
The invention relates to the technical field of aluminum alloy strips, in particular to an aluminum alloy strip, a preparation method thereof and an aluminum parting strip for hollow glass.
Background
In recent years, with the rapid development of the building industry and the high-speed rail industry, hollow glass is widely applied due to the characteristics of good sound insulation, heat insulation, ultraviolet resistance and the like, and a division bar used for the hollow glass is an aluminum product taking aluminum and aluminum alloy as raw materials. The surface of the material is treated to have the properties of high brightness, high flatness, uniform pores, aging resistance, beautiful decoration and the like, and meanwhile, the material is not easy to oxidize and corrosion resistant, does not generate any influence on a drying agent, and greatly improves the home doors and windows of people and the office environment.
The hollow glass aluminum parting strip is a structural product which bears the molecular sieve and isolates the hollow glass original sheet to play a supporting role and can be subjected to a complex environment generated by heat and cold exchange, so that the hollow glass aluminum parting strip is required to have higher corrosion resistance. Meanwhile, in order to achieve the purposes of saving raw materials and lightening, the hollow glass aluminum division bar material is developed towards the direction of thinner thickness, and the performances and the characteristics are considered at the same time. In order to meet the requirements, the corresponding hollow glass aluminum division bar material needs to have higher strength and better process performance, and the corrosion resistance of the material is improved. Therefore, the selection of the chemical components of the aluminum alloy strip for the novel hollow glass aluminum division bar material is very important, and the manufacturing method of the aluminum alloy strip is an important factor for judging whether the hollow glass aluminum division bar material can meet the performance requirement.
At present, the selection of the component range of the existing hollow glass aluminum division bar material is narrow, wherein 1100-grade aluminum alloy is the most commonly used aluminum division bar material, but the materials can not completely meet the specific requirements of the hollow glass aluminum division bar material.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides an aluminum alloy strip, a preparation method thereof and an aluminum parting strip for hollow glass.
In order to achieve the above object, an aspect of the present invention provides a method of manufacturing an aluminum alloy strip, the method comprising the steps of:
(1) preparing materials according to the components and weight percentage of the aluminum alloy, adding the raw material without titanium element into a smelting furnace for melting and heating, and then sequentially carrying out primary refining, primary deslagging, stirring, analyzing and adjusting the components to obtain aluminum liquid;
(2) transferring the aluminum liquid obtained in the step (1) to a standing furnace, sequentially carrying out standing, secondary refining, degassing and secondary deslagging, then adding a raw material containing titanium, and then casting and rolling into a plate blank;
(3) and (3) rolling the plate blank obtained in the step (2) to a preset thickness in multiple passes, rewinding and trimming under the preset thickness, continuously rolling to the thickness of a finished product, and then sequentially carrying out low-temperature stress relief annealing, stretch bending straightening and shearing.
Preferably, in step (1), the weight percentage of Fe: 0.3-0.58%, Si: 1.35-2%, Cu: 0.1-0.34%, Mn: 0.5-1.2%, Zn is less than or equal to 0.25%, Ti: 0.015-0.025 percent, and the balance of Al and inevitable impurities.
Preferably, in the step (1), the temperature is raised to 730-780 ℃.
Preferably, the raw material containing no titanium element comprises an aluminum ingot, an aluminum-iron intermediate alloy ingot, an aluminum-silicon intermediate alloy ingot, an aluminum-manganese intermediate alloy ingot, an aluminum-copper intermediate alloy ingot and a zinc ingot;
the raw material containing titanium element is aluminum-titanium-boron wire.
Preferably, in the step (2), the parameters of the casting include: the roller diameter of the roller is 855mm, the length of the casting and rolling area is 47-60mm, the temperature of the front box is 687 mm and 697 ℃, the casting and rolling speed is 650mm and 800mm/min, the water temperature is 23-25 ℃, and the water pressure is 0.4-0.5 MPa.
Preferably, in the step (3), the predetermined thickness is controlled to a cold working rate of 40-60% of the thickness of the finished product.
Preferably, in the step (3), the slab obtained in the step (2) is rolled to a predetermined thickness by 4 passes.
Preferably, in the step (3), the conditions of the low-temperature stress relief annealing include: the temperature is 140 ℃ and 180 ℃, and the heat preservation time is 9-18 hours.
A second aspect of the invention provides an aluminium alloy strip produced by the above method.
The third aspect of the invention provides an aluminum division bar for hollow glass, which is prepared from the aluminum alloy strip through narrow strip slitting, roll forming and high-frequency welding.
The aluminum alloy strip prepared by the method has higher strength and higher corrosion resistance under the same thickness, and is suitable for the more complex working environment of hollow glass.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention provides a preparation method of an aluminum alloy strip, which comprises the following steps:
(1) preparing materials according to the components and weight percentage of the aluminum alloy, adding the raw material without titanium element into a smelting furnace for melting and heating, and then sequentially carrying out primary refining, primary deslagging, stirring, analyzing and adjusting the components to obtain aluminum liquid;
(2) transferring the aluminum liquid obtained in the step (1) to a standing furnace, sequentially carrying out standing, secondary refining, degassing and secondary deslagging, then adding a titanium-containing raw material, and then casting and rolling into a plate blank;
(3) and (3) rolling the plate blank obtained in the step (2) to a preset thickness in multiple passes, rewinding and trimming under the preset thickness, continuously rolling to the thickness of a finished product, and then sequentially carrying out low-temperature stress relief annealing, stretch bending straightening and shearing.
In the method, in the step (1), the weight percentage of Fe: 0.3-0.58%, Si: 1.35-2%, Cu: 0.1-0.34%, Mn: 0.5-1.2%, Zn is less than or equal to 0.25%, Ti: 0.015-0.025 percent, and the balance of Al and inevitable impurities.
Preferably, in step (1), the temperature is raised to 780 ℃ at 730-. Specifically, for example, 730 ℃, 735 ℃, 740 ℃, 745 ℃, 750 ℃, 755 ℃, 760 ℃, 765 ℃, 770 ℃, 775 ℃ or 780 ℃ can be used.
In the method of the present invention, there is no particular requirement for the selection of the raw materials, and the raw materials may be selected conventionally in the art as long as the corresponding elements can be provided. In a specific embodiment, the raw material not containing titanium element includes an aluminum ingot, an aluminum-iron intermediate alloy ingot, an aluminum-silicon intermediate alloy ingot, an aluminum-manganese intermediate alloy ingot, an aluminum-copper intermediate alloy ingot and a zinc ingot; the raw material containing titanium element is aluminum-titanium-boron wire. The aluminum ingot is preferably an industrial pure aluminum ingot.
In the method according to the invention, the casting is carried out in a casting-rolling mill train. Through the casting and rolling process, the casting and rolling slab which meets the requirements of predetermined components, crystalline structure, plate type, appearance quality, size and the like can be obtained. The casting and rolling process and the production process directly influence the internal quality of the cast and rolled plate blank material and the processing of subsequent passes, aiming at the characteristics of high strength and high appearance quality requirement of the aluminum parting strip for hollow glass, the casting and rolling process adopts measures of degassing and deslagging inside a furnace and secondary degassing and deslagging outside the furnace, and the casting and rolling process is ensured by adopting means of adjusting the length of a casting and rolling area, the temperature of a front box, strengthening cooling and adding a micro-grain refiner titanium element into molten aluminum.
In the method of the present invention, in the step (2), the parameters of the casting include: the roller diameter of the roller is 855mm, the length of the casting and rolling area is 47-60mm, the temperature of the front box is 687 mm and 697 ℃, the casting and rolling speed is 650mm and 800mm/min, the water temperature is 23-25 ℃, and the water pressure is 0.4-0.5 MPa. In particular embodiments, the roll diameter may be 845mm, 850mm or 855 mm; the length of the casting and rolling area can be 47mm, 50mm, 55mm or 60 mm; the temperature of the front box can be 687 deg.C, 688 deg.C, 689 deg.C, 690 deg.C, 691 deg.C, 692 deg.C, 693 deg.C, 694 deg.C, 695 deg.C, 696 deg.C or 697 deg.C; the casting and rolling speed can be 650mm/min, 675mm/min, 700mm/min, 725mm/min, 750mm/min, 775mm/min or 800 mm/min; the water temperature can be 23 ℃, 23.5 ℃, 24 ℃, 24.5 ℃ or 25 ℃; the water pressure may be 0.4MPa, 0.45MPa or 0.5 MPa.
In the method of the present invention, in the step (3), the predetermined thickness is controlled to have a cold working ratio of 40 to 60% of the thickness of the finished product. Namely, the predetermined thickness is the thickness at which the cold working rate is controlled to be 40-60% of the thickness of the finished product.
Preferably, in the step (3), the slab obtained in the step (2) is rolled to a predetermined thickness by 4 passes.
In the method of the present invention, in the step (3), the conditions of the low-temperature stress relief annealing include: the temperature is 140 ℃ and 180 ℃, and the heat preservation time is 9-18 hours. Specifically, the temperature of the low-temperature stress relief annealing can be 140 ℃, 145 ℃, 150 ℃, 155 ℃, 160 ℃, 165 ℃, 170 ℃, 175 ℃ or 180 ℃; the holding time of the low temperature stress relief annealing may be 9 hours, 10 hours, 11 hours, 12 hours, 13 hours, 14 hours, 15 hours, 16 hours, 17 hours, or 18 hours.
In the method of the present invention, in the step (3), the shearing is performed in a precision shearing machine. And (3) obtaining a finished product with preset rolling texture, plate type, external dimension, surface quality and mechanical property by shearing through a precision shearing machine.
A second aspect of the invention provides an aluminium alloy strip produced by the above method.
The third aspect of the invention provides an aluminum division bar for hollow glass, which is prepared from the aluminum alloy strip through narrow strip slitting, roll forming and high-frequency welding.
The aluminum alloy strip prepared by the method has higher strength and higher corrosion resistance under the same thickness, and is suitable for the more complex working environment of hollow glass.
The present invention will be described in detail below by way of examples, but the scope of the present invention is not limited thereto.
Example 1
(1) Proportioning according to the components and weight percentage of aluminum alloy (as shown in table 1), adding an industrial pure aluminum ingot, an aluminum-iron intermediate alloy ingot, an aluminum-silicon intermediate alloy ingot, an aluminum-manganese intermediate alloy ingot, an aluminum-copper intermediate alloy ingot and a zinc ingot into a smelting furnace for melting, heating to 745 ℃, and then sequentially carrying out primary refining, primary deslagging, stirring, analysis and component adjustment to obtain aluminum liquid;
(2) transferring the aluminum liquid obtained in the step (1) to a standing furnace, sequentially carrying out standing, secondary refining, degassing and secondary deslagging, adding an aluminum-titanium-boron wire, and then casting and rolling into a plate blank; the casting and rolling process parameters are shown in table 2;
(3) and (3) rolling the plate blank obtained in the step (2) to a preset thickness through 4 passes, controlling the cold working rate of the thickness to the thickness of a finished product to be 50%, rewinding and trimming at the thickness, then continuously rolling to the thickness of the finished product, performing low-temperature stress relief annealing at the thickness of the finished product, keeping the temperature for 16 hours at 145 ℃, then continuously bending and straightening, and shearing by a precision shearing machine to obtain the aluminum alloy strip A1.
TABLE 1
| Components | Fe | Si | Cu | Mn | Zn | Ti | Al + impurities |
| Weight ratio of | 0.32 | 1.75 | 0.26 | 0.95 | 0.13 | 0.021 | The rest(s) |
TABLE 2
Example 2
(1) Proportioning according to the components and weight percentage of aluminum alloy (as shown in table 3), adding an industrial pure aluminum ingot, an aluminum-iron intermediate alloy ingot, an aluminum-silicon intermediate alloy ingot, an aluminum-manganese intermediate alloy ingot, an aluminum-copper intermediate alloy ingot and a zinc ingot into a smelting furnace for melting, heating to 750 ℃, and then sequentially carrying out primary refining, primary deslagging, stirring, analysis and component adjustment to obtain aluminum liquid;
(2) transferring the aluminum liquid obtained in the step (1) to a standing furnace, sequentially carrying out standing, secondary refining, degassing and secondary deslagging, adding an aluminum-titanium-boron wire, and then casting and rolling into a plate blank; the casting and rolling process parameters are shown in table 4;
(3) and (3) rolling the plate blank obtained in the step (2) to a preset thickness through 4 passes, controlling the cold working rate of the thickness to the finished product thickness to be 45%, rewinding and trimming at the thickness, then continuously rolling to the finished product thickness, performing low-temperature stress relief annealing at the finished product thickness, keeping the temperature at 150 ℃ for 15 hours, then continuously bending and straightening, and shearing by a precision shearing machine to obtain the aluminum alloy strip A2.
TABLE 3
| Components | Fe | Si | Cu | Mn | Zn | Ti | Al + impurities |
| Weight ratio of | 0.41 | 1.45 | 0.25 | 1 | 0.18 | 0.015 | The rest(s) |
TABLE 4
Example 3
(1) Proportioning according to the components and weight percentage of aluminum alloy (as shown in table 5), adding an industrial pure aluminum ingot, an aluminum-iron intermediate alloy ingot, an aluminum-silicon intermediate alloy ingot, an aluminum-manganese intermediate alloy ingot, an aluminum-copper intermediate alloy ingot and a zinc ingot into a smelting furnace for melting, heating to 760 ℃, and then sequentially carrying out primary refining, primary deslagging, stirring, analysis and component adjustment to obtain aluminum liquid;
(2) transferring the aluminum liquid obtained in the step (1) to a standing furnace, sequentially carrying out standing, secondary refining, degassing and secondary deslagging, adding an aluminum-titanium-boron wire, and then casting and rolling into a plate blank; the casting and rolling process parameters are shown in table 6;
(3) and (3) rolling the plate blank obtained in the step (2) to a preset thickness through 4 passes, controlling the cold working rate of the thickness to the finished product thickness to 55%, rewinding and trimming at the thickness, then continuously rolling to the finished product thickness, performing low-temperature stress relief annealing at the finished product thickness, keeping the temperature for 15 hours at 145 ℃, then continuously bending and straightening, and shearing by a precision shearing machine to obtain the aluminum alloy strip A3.
TABLE 5
| Components | Fe | Si | Cu | Mn | Zn | Ti | Al + impurities |
| Weight ratio of | 0.45 | 1.85 | 0.26 | 0.15 | 0.16 | 0.018 | The rest(s) |
TABLE 6
Example 4
(1) Proportioning according to the components and weight percentage of aluminum alloy (as shown in table 7), adding an industrial pure aluminum ingot, an aluminum-iron intermediate alloy ingot, an aluminum-silicon intermediate alloy ingot, an aluminum-manganese intermediate alloy ingot, an aluminum-copper intermediate alloy ingot and a zinc ingot into a smelting furnace for melting, heating to 760 ℃, and then sequentially carrying out primary refining, primary deslagging, stirring, analysis and component adjustment to obtain aluminum liquid;
(2) transferring the aluminum liquid obtained in the step (1) to a standing furnace, sequentially carrying out standing, secondary refining, degassing and secondary deslagging, adding an aluminum-titanium-boron wire, and then casting and rolling into a plate blank; the casting and rolling process parameters are shown in table 8;
(3) and (3) rolling the plate blank obtained in the step (2) to a preset thickness through 4 passes, controlling the cold working rate of the thickness to the finished product thickness to be 60%, rewinding and trimming at the thickness, then continuously rolling to the finished product thickness, performing low-temperature stress relief annealing at the finished product thickness, keeping the temperature for 11 hours at 165 ℃, then continuously bending and straightening, and shearing by a precision shearing machine to obtain the aluminum alloy strip A4.
TABLE 7
| Components | Fe | Si | Cu | Mn | Zn | Ti | Al + impurities |
| Weight ratio of | 0.45 | 1.6 | 0.25 | 0.1 | 0.2 | 0.018 | The rest(s) |
TABLE 8
Comparative example 1
The process was carried out as described in example 1, except that in step (3) the temperature of the stress-relief annealing was 230 ℃ to obtain an aluminum alloy strip D1.
Comparative example 2
The process was carried out as described in example 1, except that in step (3), the holding time for the low temperature stress relief annealing was 6 hours, to obtain an aluminum alloy strip D2.
Test example
1. Tensile tests were carried out on the aluminum alloy sheets obtained in examples and comparative examples by the method described in GB/T3880.2-2012, and the test results are shown in Table 9.
TABLE 9
| Performance index | Example 1 | Example 1 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 |
| Tensile strength MPa | 285 | 287 | 278 | 290 | 235 | 248 |
2. The aluminum alloy sheets obtained in examples and comparative examples were subjected to a T-bend test using a bending machine, and the test results are shown in table 10.
Watch 10
| Bending index | Example 1 | Example 1 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 |
| 2T bending crack-free | Without cracks | Without cracks | Without cracks | Without cracks | Has cracks | Has cracks |
From the data in tables 9 and 10, it can be seen that the aluminum alloy strip of the present invention exhibits excellent mechanical properties.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. A method of making an aluminum alloy strip, comprising the steps of:
(1) preparing materials according to the components and weight percentage of the aluminum alloy, adding the raw material without titanium element into a smelting furnace for melting and heating, and then sequentially carrying out primary refining, primary deslagging, stirring, analyzing and adjusting the components to obtain aluminum liquid;
(2) transferring the aluminum liquid obtained in the step (1) to a standing furnace, sequentially carrying out standing, secondary refining, degassing and secondary deslagging, then adding a raw material containing titanium, and then casting and rolling into a plate blank;
(3) and (3) rolling the plate blank obtained in the step (2) to a preset thickness in multiple passes, rewinding and trimming under the preset thickness, continuously rolling to the thickness of a finished product, and then sequentially carrying out low-temperature stress relief annealing, stretch bending straightening and shearing.
2. The method of producing an aluminum alloy strip according to claim 1, wherein in step (1), the ratio of Fe: 0.3-0.58%, Si: 1.35-2.0%, Cu: 0.1-0.34%, Mn: 0.5-1.2%, Zn is less than or equal to 0.25%, Ti: 0.015-0.025 percent, and the balance of Al and inevitable impurities.
3. The method for preparing an aluminum alloy strip according to claim 1, wherein in step (1), the temperature is raised to 780 ℃ at 730-.
4. The method for producing an aluminum alloy strip according to claim 1 or 2, wherein the raw material containing no titanium element includes an aluminum ingot, an aluminum-iron intermediate alloy ingot, an aluminum-silicon intermediate alloy ingot, an aluminum-manganese intermediate alloy ingot, an aluminum-copper intermediate alloy ingot, and a zinc ingot;
the raw material containing titanium element is aluminum-titanium-boron wire.
5. The method of producing an aluminum alloy strip according to claim 1, wherein in step (2), the parameters of the casting and rolling include: the roller diameter of the roller is 855mm, the length of the casting and rolling area is 47-60mm, the temperature of the front box is 687 mm and 697 ℃, the casting and rolling speed is 650mm and 800mm/min, the water temperature is 23-25 ℃, and the water pressure is 0.4-0.5 MPa.
6. The method of producing an aluminum alloy strip according to claim 1, wherein in the step (3), the cold working ratio of the predetermined thickness to the finished thickness is controlled to be 40-60%.
7. The method of producing an aluminum alloy strip according to claim 1, wherein in the step (3), the slab obtained in the step (2) is rolled to a predetermined thickness by 4 passes.
8. The method of producing an aluminum alloy strip according to claim 1, wherein in step (3), the conditions of the low-temperature stress relief annealing include: the temperature is 140 ℃ and 180 ℃, and the heat preservation time is 9-18 hours.
9. An aluminium alloy strip produced by the method of any one of claims 1 to 8.
10. An aluminum parting strip for hollow glass, characterized in that the aluminum parting strip is produced from the aluminum alloy strip of claim 9 by strip slitting, roll forming and high-frequency welding.
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| CN113245753A (en) * | 2021-05-13 | 2021-08-13 | 福建省泉州斌利达建材有限公司 | Production method of welded aluminum division bar |
| CN114836657A (en) * | 2022-04-29 | 2022-08-02 | 河南明泰铝业股份有限公司 | 4017 aluminum alloy sheet for novel coating material and preparation method thereof |
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Application publication date: 20200825 |