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High-strength aluminum alloy for electronic equipment and preparation and extrusion method of high-strength aluminum alloy

A technology for electronic equipment and aluminum alloy, applied in the field of aluminum alloy processing, can solve the problems of poor anodic oxidation effect, low tensile strength, and texture of oxide film, so as to improve cleanliness and uniformity, improve quality and yield , the effect of eliminating material lines

Active Publication Date: 2018-07-27
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the aluminum alloys used for the exterior structural parts of portable electronic equipment are mainly Al-Mg-Si aluminum alloys represented by 6063. Al-Mg-Si aluminum alloys are medium-strength aluminum alloys. Although they have excellent extrusion processing properties and Oxidation coloring effect, but its strength is low, and the tensile strength is generally lower than 240MPa, which is difficult to meet the design requirements of portable electronic devices.
The Al-Mg-Si-Cu series aluminum alloys represented by 6013 and 6061 have higher strength due to the higher content of Mg and Si elements and the strengthening element Cu, and the tensile strength can reach more than 300MPa, but The anodic oxidation effect of Al-Mg-Si-Cu high-strength aluminum alloys is poor, and the scrap rate is high. The oxide film often has defects such as texture, mottling, and color difference, which cannot meet consumers' requirements for the appearance quality of portable electronic devices. high decorative requirements
Therefore, the existing Al-Mg-Si-Cu series high-strength aluminum alloys and their preparation and extrusion methods still need to be improved and developed.

Method used

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  • High-strength aluminum alloy for electronic equipment and preparation and extrusion method of high-strength aluminum alloy

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Experimental program
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Effect test

Embodiment 1

[0054] High-strength aluminum alloys for electronic equipment are composed of the following mass percentages: Mg 1.2%, Si 0.4%, Cu 1.1%, Ti 0.0075%, B 0.0015%, Fe 0.08%, the balance is Al and other unavoidable impurities, The single content of other impurities is ≤0.01%, and the total content is ≤0.05%; the preparation and extrusion method includes the following steps:

[0055] The first step: select aluminum ingots with a purity of 99.9%, magnesium ingots with a purity of 99.95%, instant silicon with 99.9%, and Al-10Cu alloy and Al-5Ti-1B alloy rods as raw materials;

[0056] Step 2: Put the aluminum ingot into the heating furnace to heat and melt at 775°C, then add 1.2% magnesium ingot, 0.4% instant silicon and 11% Al-10Cu alloy to the total weight of the raw materials, stir and melt to form an aluminum alloy liquid;

[0057] Step 3: Use argon gas with a purity of 99.99% and hexachloroethane refining agent accounting for 0.7% of the total weight of raw materials to spray and ...

Embodiment 2

[0067] High-strength aluminum alloys for electronic equipment are composed of the following mass percentages: Mg 1.25%, Si 0.35%, Cu 1.05%, Ti 0.01%, B 0.002%, Fe 0.09%, and the balance is Al and other unavoidable impurities , the individual content of other impurities is ≤0.01%, and the total content is ≤0.05%; the preparation and extrusion method includes the following steps:

[0068] The first step: select aluminum ingots with a purity of 99.9%, magnesium ingots with a purity of 99.95%, instant silicon with 99.9%, and Al-10Cu alloy and Al-5Ti-1B alloy rods as raw materials;

[0069] Step 2: Put the aluminum ingot into a heating furnace and heat it at 770°C to melt it, then add 1.25% magnesium ingot, 0.35% instant silicon and 10.5% Al-10Cu alloy to the total weight of the raw materials, stir and melt to form an aluminum alloy liquid;

[0070] Step 3: Use argon gas with a purity of 99.99% and hexachloroethane refining agent accounting for 1% of the total weight of raw materi...

Embodiment 3

[0080] High-strength aluminum alloys for electronic equipment are composed of the following mass percentages: Mg 1.15%, Si 0.45%, Cu 1.15%, Ti 0.005%, B 0.001%, Fe 0.08%, the balance is Al and other unavoidable impurities , the individual content of other impurities is ≤0.01%, and the total content is ≤0.05%; the preparation and extrusion method includes the following steps:

[0081] The first step: select aluminum ingots with a purity of 99.9%, magnesium ingots with a purity of 99.95%, instant silicon with 99.9%, and Al-10Cu alloy and Al-5Ti-1B alloy rods as raw materials;

[0082] Step 2: Put the aluminum ingot into the heating furnace and heat and melt at 780°C, then add 1.15% magnesium ingot, 0.45% instant silicon and 11.5% Al-10Cu alloy to the total weight of the raw materials, stir and melt to form an aluminum alloy liquid;

[0083] Step 3: Use argon gas with a purity of 99.99% and hexachloroethane refining agent accounting for 0.5% of the total weight of raw materials ...

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Abstract

The invention discloses high-strength aluminum alloy for electronic equipment and a preparation and extrusion method of the high-strength aluminum alloy. The high-strength aluminum alloy is Al-Mg-Si-Cu series high-strength aluminum alloy. The preparation and extrusion method comprises the following steps: fusion and preparation of aluminum alloy solution, jetting and refining in a furnace, onlinegrain refinement, online twin-stage degassing filtering, semicontinuous casting, ingot casting homogenization, heating and extruding, online quenching, stretcher straightening and artificial ageing. According to the preparation and extrusion method, through optimizing design of constituent composition and the preparation and extrusion technology of aluminum alloy, the cleanliness and constituent uniformity of aluminum alloy are improved, so that the extruded aluminum alloy obtains tiny equiaxed grains with perfect recrystallization, the defects including bank mark, piebaldness and chromatic aberration of an oxidation film are eliminated, and the quality and yield of the oxidation film are improved and increased; and the extruded aluminum alloy is suitable for manufacturing the appearance structural component of portal electronic equipment and meets the light and thin design demands of the electronic equipment.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and in particular relates to a high-strength aluminum alloy for electronic equipment and a preparation and extrusion method thereof. Background technique [0002] Aluminum alloy has the advantages of light weight, unique metallic luster and texture, excellent thermal conductivity, processing performance and easy recycling, etc., and is widely used in the manufacture of appearance structural parts of various portable electronic devices, such as smart phones, tablet computers, notebooks Backplanes, middle frames, frames, etc. of portable electronic devices such as computers, LCD displays, smart watches, and e-readers. With the development of light and thin portable electronic equipment, there is an urgent need for high-strength aluminum alloy appearance structural parts to improve the resistance to compression and drop of the fuselage, so as to avoid deformation such as bending, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03C22F1/047
CPCC22C1/026C22C1/03C22C21/08C22F1/047
Inventor 王顺成杨莉陈峰黄正华康跃华
Owner GUANGDONG INST OF NEW MATERIALS
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