High-strength aluminum alloy with excellent oxidation effect and preparation method and application thereof

An aluminum alloy, high-strength technology, applied in the field of high-strength aluminum alloy and its preparation, can solve the problems of application limitation, high production cost, and incompatibility.

Active Publication Date: 2017-11-24
GUANGDONG HOSHION IND ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the patent of the above-mentioned company, special research has been done on improving the strength of the 6 series, but based on the application direction of the product, insufficient attention has been paid to the effect of anodizing. Although the tensile strength can reach 400MPA and above, without exception, thermal processing or thermal processing +The products produced after cold working are all fibrous crystals and need to undergo off-line solution treatment
Fiber crystal products are darker in color and have a stronger sense of line in subsequent anodizing, which cannot meet the appearance requirements of highly decorative electronic structural parts after anodizing
Moreover, the off-line solid solution process is complicated and the production cost is high
[0011] The high-strength 7-series (Al-Zn-Mg-Cu) alloy is used as aviation aluminum, and its tensile strength can reach 400MPA and above. It can be used as a structural material, but due to its low corrosion resistance and anodic oxidation decoration effect, as well as machining and The anodic oxidation conditions cannot be universally applied to the original system of the 6-series Al-Mg-Si(-Cu) alloy, which greatly limits its application in the field of electronic structural parts

Method used

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  • High-strength aluminum alloy with excellent oxidation effect and preparation method and application thereof
  • High-strength aluminum alloy with excellent oxidation effect and preparation method and application thereof
  • High-strength aluminum alloy with excellent oxidation effect and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070]1. The chemical composition of the high-strength Al-Mg-Si-Cu alloy according to the excellent anodic oxidation effect is calculated by mass percentage: Mg is 0.97%, Si is 0.83%, Cu is 0.82%, Mn is 0.32%, and Fe is 0.12% %, Ti is 0.027%, B is 0.0011%, the total amount of other impurities is <0.15%, and the balance is Al for material preparation.

[0071] 2. Preparation method:

[0072] The first step: select aluminum ingots with a purity of ≥99.9%, magnesium ingots with a purity of ≥99.95%, and Al-20Cu, Al-12Si, Al-20Mn master alloys, Al-5Ti-0.2B alloy rods (grain refiner) as a raw material;

[0073] Step 2: Heat and melt the aluminum ingot at 750-760°C, add magnesium ingot and intermediate alloy according to the above mass percentage, stir and melt to form aluminum alloy liquid;

[0074] Step 3: According to the ratio of 0.5 kg of refining agent / ton of aluminum alloy liquid, the refining agent is sprayed with high-purity argon with a purity ≥ 99.99% to refine the alumi...

Embodiment 2

[0082] 1. The chemical composition of the high-strength Al-Mg-Si-Cu alloy according to the excellent anodic oxidation effect is calculated by mass percentage: Mg is 1.02%, Si is 0.78%, Cu is 0.72%, Mn is 0.36%, and Fe is 0.15% %, Ti is 0.016%, B is 0.0006%, the total amount of other impurities is <0.15%, and the balance is Al for material preparation.

[0083] 2. Preparation method:

[0084] Step 1: Select aluminum ingots with a purity of ≥99.9%, magnesium ingots with a purity of ≥99.95%, and Al-20Cu, Al-12Si, Al-20Mn master alloys, and Al-5Ti-0.2B alloy rods as raw materials;

[0085] Step 2: Heat and melt the aluminum ingot at 730-740°C, add magnesium ingot and intermediate alloy according to the above mass percentage, stir and melt to form aluminum alloy liquid;

[0086] The third step: according to the ratio of 2 kg of refining agent / ton of aluminum alloy liquid, the refining agent is sprayed with high-purity argon gas with a purity ≥ 99.99% to refine the aluminum alloy l...

Embodiment 3

[0094] 1. The chemical composition of the high-strength Al-Mg-Si-Cu alloy according to the excellent anodic oxidation effect is calculated by mass percentage: Mg is 0.98%, Si is 0.69%, Cu is 0.98%, Mn is 0.27%, and Fe is 0.16% %, Ti is 0.021%, B is 0.0009%, the total amount of other impurities is <0.15%, and the balance is Al for material preparation.

[0095] 2. Preparation method:

[0096] Step 1: Select aluminum ingots with a purity of ≥99.9%, magnesium ingots with a purity of ≥99.95%, and Al-20Cu, Al-12Si, Al-20Mn master alloys, and Al-5Ti-0.2B alloy rods as raw materials;

[0097] Step 2: Heat and melt the aluminum ingot at 742-755°C, add magnesium ingot and intermediate alloy according to the above mass percentage, stir and melt to form aluminum alloy liquid;

[0098] Step 3: According to the ratio of 1.5 kg of refining agent / ton of aluminum alloy liquid, use high-purity argon gas with a purity of ≥99.99% to blow the refining agent to refine the aluminum alloy liquid fo...

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Abstract

The invention discloses a high-strength aluminum alloy with an excellent oxidation effect and a preparation method and application thereof. The alloy comprises the following components in percentage by mass: 0.6-0.9% of Si, 0.8-1.1% of Mg, not more than 0.20% of Fe, 0.5-1.0% of Cu, 0.2-0.5% of Mn, 0.015-0.03% of Ti, 0.0006-0.0012% of B, less than 0.15% of the total quantity of other impurities, and the balance Al, wherein the mass ratio of Mg to Si is Mg / Si=1.15-1.45. The aluminum alloy is higher in strength and excellent in anodic oxidation performance, welding performance and stress corrosion resistance, and can be used for manufacturing high-strength and high-decorativeness industrial aluminum alloy materials, such as electronic structural parts and light vehicle parts.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials and its manufacture, and in particular relates to a high-strength aluminum alloy with excellent oxidation effect and its preparation method and application. Background technique [0002] Al-Mg-Si(-Cu) alloy is currently the most widely used alloy, with good plasticity, weldability, corrosion resistance and good anodic oxidation decoration. It can be used to produce pipes, bars, and various profiles. The typical tensile strengths of commonly used 6063-T6, 6061-T6, 6082-T6, 6013-T6 are 220MPA, [0003] 290MPA, 320MPA, 360MPA. Among them, 6063 and 6061 alloys can be completely recrystallized by extrusion, and have good anodic oxidation performance. However, 6082 and 6013 are usually extruded materials with fibrous crystal structure or mixed crystal structure, and the anodic oxidation effect is relatively dull or the surface shows coarse crystal spots, and the decorative effect is not good. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C21/16C22C1/03C22C1/06C22F1/057C22F1/047C22F1/05
CPCC22C1/026C22C1/03C22C1/06C22C21/08C22C21/14C22C21/16C22F1/047C22F1/05C22F1/057
Inventor 丁小理李建湘罗杰刘经发周旺
Owner GUANGDONG HOSHION IND ALUMINUM CO LTD
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