CN109881233B - Preparation method of aluminum alloy curtain wall plate - Google Patents
Preparation method of aluminum alloy curtain wall plate Download PDFInfo
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- CN109881233B CN109881233B CN201910272830.2A CN201910272830A CN109881233B CN 109881233 B CN109881233 B CN 109881233B CN 201910272830 A CN201910272830 A CN 201910272830A CN 109881233 B CN109881233 B CN 109881233B
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Abstract
The invention provides a method for manufacturing an aluminum alloy curtain wall plate, which comprises the following steps of firstly preparing an aluminum alloy coiled material with the surface roughness of Ra0.3-0.5 mu m, the Rz of 1.4-2.4 mu m, the difference value of the roughness Ra of any position on the same coil of less than or equal to 0.1 mu m, and the difference value of the Rz of less than or equal to 0.6 mu m; and then continuously anodizing the aluminum coiled material through a roll-type anodizing production line, and directly cutting the aluminum coiled material into curtain wall plates with required specification lengths after anodizing. The coiled material is directly cut into plates after being anodized, so that the surface bruise defects in the production process are few, the qualification rate is high, and the production cost is reduced; and after the thickness and the internal crystal grains are controlled, the glossiness and the appearance quality of the anodized glass without chemical polishing treatment are effectively ensured. The invention has the characteristics of high efficiency, low cost, uniform and stable appearance quality and the like in production, and has wide application prospect.
Description
Technical Field
The invention belongs to the field of preparation of building materials, and particularly relates to a manufacturing method of an aluminum alloy curtain wall plate.
Background
Along with the rapid expansion of cities, the scale-to-scale ratio of high-rise buildings and the cleanness of the outer walls of the high-rise buildings always troubles all property management companies: the glass outer wall is used, so that pollution is easy to occur; the glittering and translucent marble greatly increases the building load; the traditional aluminum-plastic composite board has the fire hazard. Therefore, the anodic oxidation curtain wall which is corrosion-resistant, durable, dirt-resistant, light in weight, environment-friendly and attractive is gradually used in the market.
In the existing manufacturing method of the aluminum alloy curtain wall plate, for example, patent CN 105177328A discloses a manufacturing process of an aluminum alloy plate for a curtain wall, which uses a die-casting process to manufacture an anode to obtain the aluminum alloy plate for the curtain wall with good durability, but the production efficiency of the sheet is low, and simultaneously, because the aluminum alloy plate is produced by using the die-casting process, color difference is easy to occur under the low-temperature anode, so the surface fineness is not good; on the other hand, the anode sheet may have color difference caused by anode parameter or bath solution concentration variation between batches, which seriously affects the color difference consistency of appearance. Patent CN105040064A discloses a method for preparing a novel aluminum alloy, which obtains a desired low surface roughness by chemical polishing treatment before anode, thereby ensuring the film forming uniformity of the anodic oxide film, in order to improve the high gloss of the anodic oxide film, the electrophoresis treatment process is added after the aluminum material is anodized, but the chemical polishing and electrophoresis treatment time of the process is long, the roughness is unstable, the production time is prolonged, the efficiency is affected, and the discharge of polishing solution and electrophoresis tank solution is simultaneously a factor which is not good for global environmental protection.
Disclosure of Invention
The invention aims to provide a method for producing and manufacturing an aluminum alloy plate strip for a curtain wall, which has high production efficiency and more environment-friendly anodic oxidation process compared with the traditional anodic alumina curtain wall plate, and can produce curtain wall products with stable anode appearance quality quickly at low cost in an environment-friendly way.
In order to achieve the purpose, the following technical scheme is as follows:
a manufacturing method of an aluminum alloy curtain wall plate comprises the following specific steps:
1) after semi-continuous casting, the components of the obtained large slab ingot meeting the requirements of curtain wall use are configured according to the final use strength and appearance effect;
2) then, after necessary sawing, face milling, homogenization, hot rolling, cold rolling, heat treatment and cold rolling, the aluminum alloy coiled material with the surface roughness of Ra0.3-0.5 mu m, the Rz 1.4-2.4 mu m, the roughness Ra difference of any position on the same coil of less than or equal to 0.1 mu m, the Rz difference of less than or equal to 0.6 mu m, the length-width ratio of surface microscopic grains of less than or equal to 2 and the width of 900-2300 mm is obtained;
3) the coiled material is produced on a continuous coiled material anodic oxidation production line, aluminum materials are washed with alkali in advance, then the aluminum materials are used as the positive electrode of an electrode in an anode tank solution and are subjected to electrochemical reaction with the negative electrode continuously arranged on a machine train, a compact anodic oxide film is finally formed, and then the curtain wall plate product with the required size is prepared by drying and plate cutting;
in the step 3), in order to remove surface dirt, the alkali washing time is 10-90 s, preferably 20-50 s, and in order to quickly form an anodic oxide film layer with enough thickness, the temperature of the anodic bath liquid needs to be controlled at 3-10 ℃, so that the corrosion consumption efficiency of the anodic oxide film is reduced at low temperature, preferably 5-8 ℃; the current density is controlled to be 1-2.0A/dm2Aiming at improving the compactness of the anode micropores and ensuring the corrosion resistance of the anode oxide film in the using process, and the optimal selection is 1.2-1.3A/dm2And combined with a compound of 10 to 50m/minProducing at a row speed;
the invention has the following remarkable advantages:
(1) compared with the traditional curtain wall plate preparation method, the preparation method of the aluminum alloy curtain wall plate has the advantages that the control of the surface roughness Ra value is moderate, so that the contusion caused by the staggering between the base material manufacturing process and the surface layer of the product after anodic oxidation is extremely little, and the stability of the surface quality and the final qualified rate are improved; and the production mode of obtaining the final product by directly cutting the plate after the continuous anodic oxidation is adopted, the production process is greatly shortened, the overall qualification rate is further improved, and the production cost is favorably reduced continuously.
(2) By controlling the Rz value and the length-width ratio of crystal grains in the aluminum matrix, the glossiness and uniformity of an oxide film of the product after the anode is improved, so that the product under the invention can obtain the appearance effect which is equivalent to the appearance effect of the anode of the low-surface roughness aluminum material after the short-time chemical polishing and the anodic oxidation or the anode of the common roughness aluminum material after the long-time chemical polishing and the anodic oxidation under the condition of no need of chemical polishing, and is more environment-friendly and efficient;
(3) the invention uses coiled material to directly cut the plate after continuous anodic oxidation to obtain the finished product, thereby greatly improving the production efficiency of the plate anode.
Drawings
FIG. 1 shows the anode appearance effect of the product of the present invention;
figure 2 compares the anode appearance effect of the lower product.
Detailed Description
For further disclosure, but not limitation, the invention is further described in detail below with reference to examples.
Example 1
A method for manufacturing an aluminum alloy curtain wall plate adopts a low liquid level casting technology to manufacture a large plate ingot with the specification of 650 multiplied by 1350 multiplied by 8000mm, and the alloy components are as follows: according to the mass fraction, the alloy comprises 0.12% of Si, 0.35% of Fe0, 0.1% of Cu0, 0.05% of Mn0, 0.5% of Mg0.1%, 0.1% of Cr0, 0.2% of Zn0, and the balance of unavoidable rolling and Al. After the ingot is sawed 400mm from the head and the tail and the upper and lower surfaces are milled 20mm, the ingot is placed in a heating furnace for homogenizing annealing, the annealing system is that the temperature is kept for 10h at 500 ℃, and then hot rolling is carried out to obtain a hot rolling blank of 5.0mm, wherein the convexity of the blank is 0.5%.
The process route of the cold rolling section is as follows: 5.0-3.0-2.0-1.5 of heat treatment.
The rolling deformation of the finished product in the cold rolling pass is 25%, the heat treatment schedule is 340 ℃/2h, the surface roughness of the cold rolled finished product is Ra0.35 mu m, Rz1.8 mu m, the Ra difference value at any position is 0.1 mu m, the Rz difference value is 0.6 mu m, and the aspect ratio of surface microscopic grains is 2.
The coiled material is produced on an anodic oxidation production line, the production speed is 30m/min, the alkali washing time is 20s, the bath solution temperature is 10 ℃, and the current density is 1.5A/dm2The product is subjected to hole sealing and drying, and then cut into boards with the length of 2440mm, the surface glossiness of the boards is 156Gu, the head and tail poor loss length is 120m, and the practical use requirements of high-rise buildings can be met.
Example 2
A method for manufacturing an aluminum alloy curtain wall plate adopts a low liquid level casting technology to manufacture a large plate ingot with the specification of 520 x 1700 x 6000mm, and the aluminum alloy curtain wall plate comprises the following alloy components: by mass fraction, 0.3% of Si, 0.7% of Fe0.7%, 0.05% of Cu0.2%, 0.2% of Mn1.1%, 0.02% of Cr0.11%, and the balance of unavoidable rolling and Al. After the ingot is sawed by the head and the tail by 300mm and the upper and lower surfaces are milled by 15mm, the ingot is placed in a heating furnace for homogenizing annealing, the annealing system is that the temperature is kept for 20h at 450 ℃, and then hot rolling is carried out to obtain a hot rolling blank with the thickness of 10.0mm, wherein the convexity of the hot rolling blank is 0.2%.
The process route of the cold rolling section is as follows: 10.0-7.0-heat treatment-6.0.
The rolling deformation of the cold rolling pass of the finished product is 14 percent, the heat treatment schedule is 340 ℃/2h, the surface roughness of the cold rolled product is Ra0.5 mu m, Rz2.4 mu m, the Ra difference value at any position is 0.05 mu m, the Rz difference value is 0.4 mu m, and the aspect ratio of surface microscopic grains is 1.5.
The coiled material is produced on an anodic oxidation production line, the production speed is 10m/min, the alkali washing time is 80S, the temperature of bath solution is 5 ℃, and the current density is 1.0A/dm2The product is subjected to anodic oxidation film thickness of 50 μm, sealing and drying, and then cut into 1200mm long plates, and the surfaces thereofThe glossiness of 180Gu and the head and tail poor loss length of 150m can meet the actual use requirements of high-rise buildings.
Example 3
A method for manufacturing an aluminum alloy curtain wall plate adopts a low liquid level casting technology to manufacture a large plate ingot with the specification of 560 x 1400 x 3600mm, and the aluminum alloy curtain wall plate comprises the following alloy components: by mass fraction, 0.05% of Si0.08%, 0.08% of Fe0.08%, 0.02% of Cu0.08%, 0.08% of Mn0.9%, 0.03% of Cr0.05%, and the balance of unavoidable rolling and Al. After the ingot is sawed by 200mm from the head and the tail and the upper and lower surfaces are milled by 10mm, the ingot is placed in a heating furnace for homogenizing annealing, the annealing system is that the temperature is kept for 4h at 530 ℃, and then hot rolling is carried out to obtain a hot rolling blank with the thickness of 8.0mm, and the convexity of the hot rolling blank is 1.0%.
The process route of the cold rolling section is as follows: 8.0-5.0-2.8-heat treatment-2.0.
The rolling deformation of the finished product in the cold rolling pass is 29 percent, the heat treatment system is 340 ℃/2h, the surface roughness of the cold rolled finished product is Ra0.30 mu m, Rz1.4 mu m, the Ra difference value at any position is 0.06 mu m, the Rz difference value is 0.2 mu m, and the aspect ratio of surface microscopic grains is 1.3.
The coiled material is produced on an anodic oxidation production line, the production speed is 50m/min, the alkali washing time is 30s, the temperature of bath solution is 8 ℃, and the current density is 1.2A/dm2The thickness of an oxide film of the product after being subjected to anodic oxidation is 45 mu m, the product is cut into materials of 3600mm after hole sealing and drying, the surface glossiness is 182Gu, the head and tail poor loss length is 128m, the actual use requirement of a high-rise building can be met, and the anodic effect is shown in figure 1.
Comparative example 1
An aluminum alloy curtain wall plate produced by a certain domestic aluminum factory is prepared into a large plate ingot by adopting a low liquid level casting technology, the alloy components conform to the specification of 5005 alloy in GB3190, the ingot is subjected to surface milling, heating and hot rolling to obtain a hot rolling blank with the blank thickness of 5.0mm, and the process route of a cold rolling section is as follows:
5.0-3.0-2.0-finished product annealing
The surface roughness of the cold rolled product is not controlled and required, and the surface microscopic grains are in a strip shape. After being cut, the curtain wall plate is subjected to 60S chemical polishing (pollutes the environment and harms the bodies of operators), and then is subjected to anodic oxidation to prepare the curtain wall plate with the anodic oxide film thickness of 25 mu m and the surface glossiness of 140Gu, the head and tail and the process contusion damage loss length is more than 180m, and the curtain wall plate can only be used as a common curtain wall outer plate.
Comparative example 2
An aluminum alloy curtain wall plate produced by a certain domestic aluminum factory is prepared into a large plate ingot by adopting a low liquid level casting technology, the alloy components conform to the specification of 5005 alloy in GB3190, the ingot is subjected to surface milling, heating and hot rolling to obtain a hot rolling blank with the blank thickness of 8.0mm, and the process route of a cold rolling section is as follows:
8.0-5.0-Heat treatment-3.0
The surface roughness of the cold rolled product is not controlled and required, and the length-width ratio of surface micro grains is 4.0. The plate is cut, acid-base washed and then anodized to prepare the curtain wall plate with the thickness of an anodic oxide film being 25 mu m and the surface glossiness being 110Gu, the head and tail and the process bruise are poor, the loss length is more than 180m, the curtain wall plate can only be used as an ordinary curtain wall outer plate, and the anodic effect is shown in figure 2.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (5)
1. The manufacturing method of the aluminum alloy curtain wall plate is characterized by comprising the following steps:
1) manufacturing an aluminum substrate: carrying out necessary saw cutting, face milling, homogenization, hot rolling, cold rolling, heat treatment and cold rolling on a large plate ingot obtained by semi-continuous casting to obtain an aluminum alloy coiled material with the roughness Ra of 0.3-0.5 mu m, the Rz of 1.4-2.4 mu m, the difference value of the roughness Ra of any position on the same coil of less than or equal to 0.1 mu m, the difference value of the Rz of less than or equal to 0.6 mu m, the aspect ratio of surface microscopic grains of less than or equal to 2 and the width of 900-2300 mm;
2) manufacturing a curtain wall aluminum plate product: and (3) producing the coiled material on a continuous coiled material anodic oxidation production line, increasing and decreasing the anodic time according to the thickness requirement of an anodic oxidation film, and cutting the product subjected to anodic oxidation after necessary drying to obtain the product with the required dimension and specification.
2. The method of making an aluminum alloy curtain wall panel as recited in claim 1, wherein: the convexity of the hot-rolled blank in the step 1) is less than or equal to 1.0 percent, and the surface roughness Rz1.5-2.0 mu m of a cold-rolling roller.
3. The method of making an aluminum alloy curtain wall panel as recited in claim 1, wherein: and 2) before anodizing, the aluminum material does not need to be subjected to chemical polishing treatment.
4. The method of making an aluminum alloy curtain wall panel as recited in claim 1, wherein: the temperature of the anodic oxidation in the step 2) is 3-10 ℃, the voltage is 12 +/-3V, and the current is 1.0-2.0A/dm2。
5. The method of making an aluminum alloy curtain wall panel as recited in claim 1, wherein: in the anodic oxidation process in the step 2), the train speed is 10-50 m/min; the thickness of the anodic oxide film is 20 μm or more.
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| US7018521B2 (en) * | 2001-09-27 | 2006-03-28 | General Motors Corporation | Method of producing bright anodized finishes for high magnesium, aluminum alloys |
| JP4790563B2 (en) * | 2006-10-16 | 2011-10-12 | Ｙｋｋ Ａｐ株式会社 | Aluminum material or aluminum alloy material, and building material products using the same |
| CN106435684A (en) * | 2016-08-31 | 2017-02-22 | 佛山市南海双成金属表面技术有限公司 | Aluminum coil non-contact continuous anodizing technique |
| CN106906390B (en) * | 2017-03-28 | 2019-04-05 | 山东南山铝业股份有限公司 | Aluminium alloy anode oxide plate and its production method |
| CN109207805B (en) * | 2018-11-28 | 2020-01-03 | 中铝瑞闽股份有限公司 | Preparation method of aluminum alloy strip for curtain wall |
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