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Al-Mg-Si-Cu-Mn alloy and preparation method thereof

A technology of al-mg-si-cu-mn and alloy, which is applied in the field of Al-Mg-Si-Cu-Mn alloy and its preparation, can solve the problems that cannot meet the production requirements of high-brightness electronic structural parts and produce sand holes , to achieve excellent anodic oxidation effect, high specific strength and excellent effect

Active Publication Date: 2019-03-01
GUANGDONG HOSHION IND ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aluminum alloy prepared by the above method, although the strength, elongation and oxidation surface gloss of the aluminum alloy are all in a good range, but it still has material grains and sand holes in the polishing and oxidation process. , pitting and other defects, unable to meet the production requirements of high-brightness electronic structural parts

Method used

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  • Al-Mg-Si-Cu-Mn alloy and preparation method thereof
  • Al-Mg-Si-Cu-Mn alloy and preparation method thereof
  • Al-Mg-Si-Cu-Mn alloy and preparation method thereof

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preparation example Construction

[0053] A method for preparing an Al-Mg-Si-Cu-Mn alloy provided by the present invention comprises the following steps: (1) preparing raw materials according to the above-mentioned mass percentage; (2) smelting and alloying the raw materials (3) refining the aluminum alloy liquid I, removing slag, and standing still to obtain the aluminum alloy liquid II; (4) adding a grain refiner to the aluminum alloy liquid II to obtain Aluminum alloy liquid III; (5) semi-continuous water-cooled casting of the aluminum alloy liquid III to obtain an aluminum alloy ingot A; (6) homogenization treatment and cooling to obtain an aluminum alloy ingot B; extruding and quenching to obtain an extruded aluminum alloy Alloy; (7) Artificial aging treatment to obtain alloy ingot.

[0054] Preferably, the homogenization treatment is a two-stage homogenization treatment, including: the first stage: the aluminum alloy ingot A is heated from room temperature to 530-550°C at a heating rate of 180°C-250°C / h a...

Embodiment 1-4

[0066] An Al-Mg-Si-Cu alloy described in Examples 1-4 includes the components shown in Table 1 in terms of mass percentage, wherein the total percentage of impurities is ≤0.15%, and the balance is Al.

[0067] Table 1

[0068] components

Example 1

Example 2

Example 3

Example 4

Si

0.6％

0.7％

0.55％

0.7％

Mg

0.9％

0.95％

0.85％

0.9％

mn

0.15％

0.12％

0.1％

0.18％

Cu

0.6％

0.63％

0.57％

0.48％

Ti

0.008％

0.003％

0.01％

0.012％

Mg:Si

1.5:1

1.357:1

1.545:1

1.286:1

[0069] The raw materials for preparing the above-mentioned Al-Mg-Si-Cu alloy are as follows:

[0070] Aluminum ingots: selected as aluminum ingots with a purity ≥99.9%, meeting the requirements of Al99.90 in the standard GB / T 1196-2008 "Aluminum Ingots for Remelting";

[0071] Magnesium ingot: Magnesium ingot is preferably magnesium ingot with a purity ≥ 99.95%, which meets the requirements of Mg...

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Abstract

The invention provides an Al-Mg-Si-Cu-Mn alloy including the following chemical composition by mass: 0.50-0.75% of Si, 0.85-1.00% of Mg, 0.08-0.18% of Mn, 0.48-0.63% of Cu, 0.003-0.012% of Ti, no morethan 0.1% of Fe, no more than 0.15% of impurities and the balance Al. The mass ratio of the Mg element to the Si element is that Mg / Si = 1.15-1.60. The alloy has the advantages of high tensile strength, high yield strength, excellent anodizing performance and attractive surface, and solves the problems of easy wear and deformation under pressure caused by moderate strength of the 6061 aluminum alloy for portable electronic equipment.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials and its manufacture, and in particular relates to an Al-Mg-Si-Cu-Mn alloy and a preparation method thereof. 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, etc., and is widely used in the manufacture of various commodities. In recent years, the consumer electronics market has shown explosive growth, and electronic products with various structures and decorations have emerged on the market, among which the aluminum alloy structure and decoration are symbols of high-end products. 6061 aluminum alloy has excellent anodizing effect and medium-strength mechanical properties, and is an excellent material for manufacturing casings and frame structures of portable electronic equipment. With the continuous advanceme...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/02C22C1/06C22F1/047
CPCC22C1/026C22C1/06C22C21/08C22F1/002C22F1/047
Inventor 罗杰金炯朱顺辉丁小理刘志成任强
Owner GUANGDONG HOSHION IND ALUMINUM CO LTD
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