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Anodized aluminum base material for aluminum veneer curtain wall and preparation method thereof

An anodizing aluminum and anodizing technology, applied in anodizing and other directions, can solve the problems of high production costs, difficult roll grinding, and high raw material costs, and achieve improved anode appearance, high product yield, and low production costs. Effect

Active Publication Date: 2020-12-25
CHINALCO RUIMIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing production methods of high-grade anodized materials, such as the patent CN105624483B discloses a medium-strength anodized aluminum alloy strip and its preparation method, it is required that Si≤0.05wt% and Fe≤0.08wt% in the impurity content, The cost of raw materials is high; another example is that the patent CN105525166A discloses an aluminum alloy strip for anodic oxidation and its preparation method. Its surface roughness requires Ra0.3μm. During the manufacturing process, it is easy to cause surface quality problems such as surface contusion due to interlayer misalignment, resulting in high production costs

Method used

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  • Anodized aluminum base material for aluminum veneer curtain wall and preparation method thereof
  • Anodized aluminum base material for aluminum veneer curtain wall and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] An aluminum alloy plate and strip for curtain wall, its composition is calculated by mass fraction, Si: 0.10%, Fe: 0.16%, Cu: 0.06%, Mg: 0.8%, Ti: 0.011%, and the balance is Al;

[0022] The preparation method comprises the following steps:

[0023] 1) After melting the aluminum ingot at 740°C, let it stand for 2 hours, and then cast it at 690°C to obtain a large slab ingot with a size of 650×1350×8000mm;

[0024] 2) After sawing the ingot to 400mm from the head and tail and milling the upper and lower surfaces by 30mm, the ingot is heated in a heating furnace. After the metal temperature is 440°C and kept for 2 hours, it is hot-rolled to a final rolling temperature of 300°C and a thickness of 5.0mm;

[0025] 3) Then the 5.0mm billet is produced according to the following cold rolling process:

[0026] 5.0-3.0-2.0-intermediate annealing-1.5,

[0027] The cold rolling deformation before intermediate annealing is 60%, the cold rolling roll Ra0.35μm, Rz1.8μm, the surface...

Embodiment 2

[0030] An aluminum alloy plate and strip for curtain wall, its composition is calculated by mass fraction, Si: 0.20%, Fe: 0.30%, Cu: 0.10%, Mg: 1.3%, Ti: 0.02%, and the balance is Al;

[0031] The preparation method comprises the following steps:

[0032] 1) After melting the aluminum ingot at 770°C, let it stand for 1 hour, and then cast it at 710°C to obtain a large slab ingot with a size of 520×1600×7000mm;

[0033] 2) After sawing the ingot to 300mm from the head and tail and milling the upper and lower surfaces by 5mm, the ingot is heated in a heating furnace. After the metal temperature is 460°C for 4 hours, it is hot-rolled to a final rolling temperature of 260°C and a thickness of 8.0mm;

[0034] 3) Then the 8mm billet is produced according to the following cold rolling process:

[0035] 8.0-6.0-4.0-intermediate annealing-2.0,

[0036] The cold rolling deformation before intermediate annealing is 50%, the cold rolling roll Ra0.55μm, Rz3.0.μm, the surface roughness of...

Embodiment 3

[0039] An aluminum alloy plate and strip for curtain wall, its composition is calculated by mass fraction, Si: 0.12%, Fe: 0.18%, Cu: 0.08%, Mg: 0.7%, Ti: 0.016%, and the balance is Al;

[0040] The preparation method comprises the following steps:

[0041] 1) After melting the aluminum ingot at 750°C, let it stand for 1.5h, and then cast it at 700°C to obtain a large slab ingot with a size of 520×1100×3600mm;

[0042] 2) After sawing the ingot to 200mm from the head and tail and milling the upper and lower surfaces by 15mm, the ingot is heated in a heating furnace. After the metal temperature is 450°C and kept for 10h, it is hot-rolled to a final rolling temperature of 350°C and a thickness of 10.0mm;

[0043] 3) Finally, the 10.0mm billet is produced according to the following cold rolling process:

[0044] 12.0-7.0-intermediate annealing-6.0,

[0045] The cold rolling deformation before intermediate annealing is 42%, the cold rolling roll Ra0.40μm, Rz2.6μm, the surface rou...

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Abstract

The invention belongs to the preparation field of aluminum and aluminum alloy, and specifically provides a high-quality aluminum base material for the certain wall, and the high-quality aluminum basematerial has surface roughness Ra 0.3-0.5 [mu]m, Ra 0.3-0.5[mu]m, Rz 1.4-2.4 [mu]m, has a roughness Ra difference value smaller than or equal to 0.1 [mu]m on any position of the same coil, has a Rz difference value smaller than or equal to 0.6 [mu]m, and has stable surface roughness after being subjected to anode oxidization. A preparation method for the anode aluminum oxide base material comprises the following steps: firstly, smelting and casting an aluminum alloy into a large plate ingot, and saw-cutting and milling the cast ingot; and then, preparing the needed aluminum base material through processes such as uniform-heating, hot-rolling, cold-rolling, intermediate annealing and cold-rolling. An aluminum alloy coiled material does not need to manufacture from high-purity aluminum; crystalline grains inside products are effectively controlled to overcome the problems that many surface scratches are caused, chemical polishing efficiency is low, environmental protection is not caused,and the like as a low-roughness aluminum base body or a high-roughness aluminum base body is chemically polished for a long time before an anode. The anode aluminum oxide base material is simple in production process, is stable in surface quality, and can greatly reduce the production cost.

Description

technical field [0001] The invention belongs to the field of preparation of building materials, and in particular relates to an aluminum substrate for anodized aluminum curtain wall panels and a preparation method thereof. Background technique [0002] With the rapid expansion of the city, there are row upon row of high-rise buildings, and the clean exterior walls of high-rise buildings have always troubled property management companies: aluminum materials are light in weight, and the surface is anodized, which is anti-corrosion, durable, dirt-resistant, and environmentally friendly. And other characteristics, have been applied to the field of building curtain wall. In the article "What material is the best for aluminum curtain wall" ("Construction Worker" periodical 2008, Issue 08, ISSN: 1002-3232), it is clearly stated that the single-piece aluminum veneer anodized product is the most environmentally friendly and safe among all aluminum curtain wall panels However, after ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/03C22F1/047C25D11/04
Inventor 江钟宇郑翰黄瑞银方小明林盛
Owner CHINALCO RUIMIN
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