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High-conductivity high-strength aluminum alloy and preparation method thereof

A technology of aluminum alloy and aluminum alloy ingot casting, which is applied in the field of aluminum alloy, can solve the problems of low strength, low thermal conductivity, and high strength, and achieve the effects of refining grains, eliminating influence, and avoiding polymerization failure

Inactive Publication Date: 2019-10-22
GUANGDONG HOSHION IND ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a high-conductivity and high-strength aluminum alloy and its preparation method to solve the problems raised in the above-mentioned background technology: alloys with high thermal conductivity have low strength; alloys with high strength have low thermal conductivity

Method used

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  • High-conductivity high-strength aluminum alloy and preparation method thereof

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Embodiment 1

[0041] The composition of a high-conductivity and high-strength aluminum alloy: Si is 0.74%, Mg is 0.92%, Fe is 0.08%, Cu is 0.67%, Mn is 0.08%, B is 0.023%, Cr is 0.0020%, and Ti is 0.0040%. Other single ≤0.03%, total ≤0.15%, the balance is Al.

[0042] A method for manufacturing a high-conductivity high-strength aluminum alloy, comprising the following steps:

[0043] (1) Prepare materials according to the above mass percentages, wherein aluminum and magnesium adopt aluminum ingots and magnesium ingots;

[0044] (2) Heating the aluminum ingot to 760° C. for melting, then adding magnesium ingot and master alloy, wherein, boron adopts B3 master alloy; stirring and melting to obtain aluminum alloy liquid I;

[0045] (3) Adding a refining agent to the aluminum alloy liquid I, and then introducing argon gas to refine the aluminum alloy liquid, removing slag, and standing to obtain aluminum alloy liquid II;

[0046] (4) Put the aluminum alloy liquid II into the launder, and then...

Embodiment 2

[0052] The composition of a high-conductivity and high-strength aluminum alloy: Si is 0.60%, Mg is 0.95%, Fe is 0.13%, Cu is 0.75%, Mn is 0.12%, B is 0.014%, Cr is 0.0010%, and Ti is 0.0080%. Other single ≤0.03%, total ≤0.15%, the balance is Al.

[0053] A method for manufacturing a high-conductivity high-strength aluminum alloy, comprising the following steps:

[0054] (1) Prepare materials according to the above mass percentages, wherein aluminum and magnesium adopt aluminum ingots and magnesium ingots;

[0055] (2) Heating the aluminum ingot to 760° C. for melting, then adding magnesium ingot and master alloy, wherein, boron adopts B3 master alloy; stirring and melting to obtain aluminum alloy liquid I;

[0056] (3) Adding a refining agent to the aluminum alloy liquid I, and then introducing argon gas to refine the aluminum alloy liquid, removing slag, and standing to obtain aluminum alloy liquid II;

[0057] (4) Put the aluminum alloy liquid II into the launder, and then...

Embodiment 3

[0063] The composition of a high-conductivity and high-strength aluminum alloy: Si is 0.80%, Mg is 0.85%, Fe is 0.10%, Cu is 0.55%, Mn is 0.08%, B is 0.037%, Cr is 0.0010%, and Ti is 0.0010%. Other single ≤0.03%, total ≤0.15%, the balance is Al.

[0064] A method for manufacturing a high-conductivity high-strength aluminum alloy, comprising the following steps:

[0065] (1) Prepare materials according to the above mass percentages, wherein aluminum and magnesium adopt aluminum ingots and magnesium ingots;

[0066] (2) Heating the aluminum ingot to 760° C. for melting, then adding magnesium ingot and master alloy, wherein, boron adopts B3 master alloy; stirring and melting to obtain aluminum alloy liquid I;

[0067] (3) Adding a refining agent to the aluminum alloy liquid I, and then introducing argon gas to refine the aluminum alloy liquid, removing slag, and standing to obtain aluminum alloy liquid II;

[0068] (4) Put the aluminum alloy liquid II into the launder, and then...

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Abstract

The invention relates to the technical field of aluminum alloys, and discloses a high-conductivity high-strength aluminum alloy. The high-conductivity high-strength aluminum alloy comprises, by mass,0.60%-0.80% of Si, 0.85%-0.95% of Mg, 0.04%-0.13% of Fe, 0.55%-0.75% of Cu, 0.04%-0.13% of Mn, less than or equal to 0.0050% of Cr, 0.01%-0.04% of B, 0.0010%-0.0080% of Ti, and the balance Al. The invention further discloses a preparation of the high-conductivity high-strength aluminum alloy. The preparation method comprises the following steps that 1, materials are prepared according to the masspercentage; 2, an aluminum ingot is heated to 730 DEG C-780 DEG C for melting, the magnesium ingot and an intermediate alloy are added to obtain a first aluminum alloy liquid; 3, a refining agent is added, and argon is introduced to refine to obtain a second aluminum alloy liquid; 4, the second aluminum alloy liquid is put into a flow groove so as to obtain a third aluminum alloy liquid; 5, casting is performed to obtain an aluminum alloy ingot A; 6, homogenization treatment is performed to obtain an aluminum alloy ingot B; 7, the aluminum alloy ingot B is heated to 500 DEG C-550 DEG C for extrusion forming to obtain an extruded aluminum alloy C; and 8, artificial aging treatment is performed. According to the high-conductivity high-strength aluminum alloy, the yield strength of the aluminum alloy is further increased, the yield strength is 380 MPa or above, and the conductivity is 180 (20 DEG C, w / m.K), and the oxidation effect is high.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a high-conductivity and high-strength aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloy is an alloy composed of aluminum and other elements. It has the advantages of small specific gravity, high strength, corrosion resistance, good electrical and thermal conductivity, environmental protection and recyclability, and has become one of the most widely used materials in daily life. [0003] With the application of wireless charging and 5G technology, aluminum alloy is widely used in the middle frame of smartphones. At the same time, in order to reduce the shielding of the signal by the aluminum alloy middle frame, the size of the middle frame is getting thinner and thinner, and the side width has been reduced to 1-3mm. The thickness of the connecting plate is 0.4-0.5mm. The size is narrowed. In order to meet the structural strength...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03C22C1/06C22F1/047
CPCC22C1/026C22C1/03C22C1/06C22C21/08C22F1/002C22F1/047
Inventor 丁小理罗杰罗跃鹏刘志成刘经发
Owner GUANGDONG HOSHION IND ALUMINUM CO LTD
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