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Preparation method and application of aluminum alloy profile

A technology for aluminum alloy profiles and aluminum alloys, which is applied in the field of aluminum alloys and can solve problems such as film burst cracking, anode effect that cannot meet customer needs, doping, etc.

Active Publication Date: 2022-04-15
GUANGDONG HOSHION IND ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the Mg2Si is 1.7, the temperature range between the solvus line and the solidus line is about 10°C, and it is very easy to have over-burned structure or insufficient solid solution during the production process; (3) The sintered product has high hardness, because of the difference in flow rate and aluminum, it will be elongated and form strip defects in the extruded material
These impurity phases dissolve and fall off during the oxidation process, leaving pits at the falling position, visually presenting black line-like defects, resulting in anodic effects that cannot meet customer needs
(4) Large particles (greater than 1 μm) with insufficient solid solution have a large difference in electrochemical performance from the substrate. During anodic oxidation surface treatment, as an anode, they will fall off to form holes or be doped in the oxide film, resulting in oxidation The visual numbness effect of the film and the anode effect cannot meet customer needs
[0004]Although the 7-series alloy can easily achieve a strength of 500MPa, or even 600MPa or more, due to the high composition of the 7-series alloy, anodic oxidation is prone to cracking defects, so it has not been used Can be used on high-gloss anodized mobile phone casings

Method used

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  • Preparation method and application of aluminum alloy profile
  • Preparation method and application of aluminum alloy profile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] In this embodiment, an aluminum alloy profile is prepared, and the specific preparation method is as follows:

[0057] (1) Melting, casting and homogenization of alloy cast rods:

[0058] Prepare materials according to the above mass percentages, wherein aluminum and magnesium are made of aluminum ingots and magnesium ingots, and the unavoidable impurities in the aluminum ingots are Fe: 0.08%, and B: 0.0050%. Among aluminum titanium boron refiners, TiB 2 95% of the individual particle diameters are less than 3 μm, and the distribution is roughly uniform and diffuse.

[0059] Heat the aluminum ingot to 760°C for melting, then add magnesium ingot and intermediate alloy, stir and melt to obtain aluminum alloy liquid I;

[0060] Add a refining agent to the aluminum alloy liquid, and then introduce argon gas to refine the aluminum alloy liquid, remove slag, and let it stand to obtain aluminum alloy liquid II, wherein the refining agent is purchased from the market. In the ...

Embodiment 2

[0077] In this embodiment, an aluminum alloy profile is prepared, and the specific preparation method is as follows:

[0078] (1) Melting, casting and homogenization of alloy cast rods:

[0079] Prepare materials according to the above mass percentages, wherein aluminum and magnesium are made of aluminum ingots and magnesium ingots, and the unavoidable impurities in the aluminum ingots are Fe: 0.08%, and B: 0.0050%. Among aluminum titanium boron refiners, TiB 2 95% of the individual particle diameters are less than 3 μm, and the distribution is roughly uniform and diffuse.

[0080] Heat the aluminum ingot to 760°C for melting, then add magnesium ingot and intermediate alloy, stir and melt to obtain aluminum alloy liquid I;

[0081] Adding a refining agent to the aluminum alloy liquid, and then introducing argon gas to refine the aluminum alloy liquid, removing slag, and standing still to obtain aluminum alloy liquid II;

[0082] Putting the aluminum alloy liquid II into the...

Embodiment 3

[0097] This example prepares an aluminum alloy material. The difference from Example 1 is that during the preparation process, during the preheating treatment of the profile, the extruded material is preheated and heated to 160° C. for 2 hours.

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Abstract

The invention provides a preparation method and application of an aluminum alloy profile. The preparation method comprises the following steps: firstly adding a magnesium ingot and an intermediate alloy to obtain an aluminum alloy liquid I, then refining the aluminum alloy liquid I to remove impurities to obtain an aluminum alloy liquid II, then adding a grain refiner to carry out online grain refinement treatment on the aluminum alloy liquid II to obtain an aluminum alloy liquid III, filtering the aluminum alloy liquid III, casting and homogenizing to obtain a cast rod, and finally, carrying out heat treatment on the cast rod to obtain the aluminum alloy. The preparation method comprises the following steps: casting a cast rod into an aluminum alloy profile, heating the cast rod, carrying out extrusion molding to obtain an extruded profile, carrying out preheating treatment and cold deformation processing, and carrying out artificial aging treatment, so that the strength of the aluminum alloy profile is improved, a good anodic oxidation effect is ensured, and the prepared aluminum alloy profile can meet the processing requirements of 3C products.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to a preparation method and application of an aluminum alloy profile. Background technique [0002] Aluminum alloy has many characteristics such as light specific gravity, high specific strength, good heat dissipation, easy processing, excellent anodic oxidation decoration effect, and recyclable reuse, so it is widely used in the manufacture of various commodities. As a commonly used material for 3C structural parts, in order to give more room for mobile phone internal structure designers, and due to the lightweight requirements of mobile phones, it is required to further increase the yield strength of materials in order to meet the structural strength test requirements of complete mobile phone parts. At the same time, customers are also very concerned about the appearance of mobile phones. The surface treatment is mostly high-brightness anodizing, which can be d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C1/06C22C21/14C22C21/16C22F1/057B21C37/00
Inventor 李建湘丁小理李信刘志成罗杰周武军
Owner GUANGDONG HOSHION IND ALUMINUM CO LTD