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Semi-solid die-cast high-thermal-conductivity aluminum alloy and die-casting method thereof

An aluminum alloy, semi-solid technology, applied in the field of aluminum alloy die-casting, can solve the problems of inability to meet the semi-solid die-casting process requirements, low Si content, poor casting fluidity, etc., achieve excellent semi-solid die-casting performance, good thermal conductivity, and improve flow sexual effect

Active Publication Date: 2018-06-15
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these grades of deformed aluminum alloys have good thermal conductivity, due to the low content of Si, the casting fluidity of these grades of deformed aluminum alloys is very poor, which cannot meet the process requirements of semi-solid die-casting, and is only suitable for extrusion, Plastic processing methods such as rolling and forging

Method used

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  • Semi-solid die-cast high-thermal-conductivity aluminum alloy and die-casting method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The semi-solid die-casting high thermal conductivity aluminum alloy is composed of the following mass percentages: Si 6.6%, Mg 0.15%, Ti0.03%, Cr 0.05%, Yb 0.01%, Te 0.01%, Be 0.05%, Fe ≤0.15%, more than The amount is Al and other unavoidable impurity elements. The individual content of other impurity elements is less than 0.05%, and the total amount is less than 0.15%. The semi-solid die-casting high thermal conductivity aluminum alloy die casting method includes the following steps:

[0041] The first step: According to the percentage of aluminum alloy composition, select Al10Ti alloy, Al5Cr1Yb alloy, Al5Te alloy, Al5Be alloy and aluminum ingot with purity of 99.7%, 99.9% of instant silicon and 99.95% of magnesium ingot as raw materials for ingredients;

[0042] Step 2: Heat and melt the aluminum ingot at 750°C, and then add 6.6% of the total weight of raw materials of instant silicon, 0.15% of magnesium ingot, 0.3% of Al10Ti alloy, 1% of Al5Cr1Yb alloy, 0.2% of Al5Te allo...

Embodiment 2

[0047] Semi-solid die-cast high thermal conductivity aluminum alloy is composed of the following mass percentages: Si 7%, Mg 0.25%, Ti 0.04%, Cr 0.1%, Yb 0.02%, Te 0.02%, Be 0.09%, Fe ≤0.15%, the balance It is Al and other unavoidable impurity elements. The individual content of other impurity elements is less than 0.05%, and the total amount is less than 0.15%. The semi-solid die-casting high thermal conductivity aluminum alloy die casting method includes the following steps:

[0048] The first step: According to the percentage of aluminum alloy composition, select Al10Ti alloy, Al5Cr1Yb alloy, Al5Te alloy, Al5Be alloy and aluminum ingot with purity of 99.7%, 99.9% of instant silicon and 99.95% of magnesium ingot as raw materials for ingredients;

[0049] Step 2: Heat and melt the aluminum ingot at 725°C, and then add 7% instant silicon, 0.25% magnesium ingot, 0.4% Al10Ti alloy, 2% Al5Cr1Yb alloy, 0.4% Al5Te alloy and 1.8% Al5Be alloy, stir and melt into aluminum alloy liquid;

[...

Embodiment 3

[0054] The semi-solid die-cast high thermal conductivity aluminum alloy is composed of the following mass percentages: Si 7.4%, Mg 0.2%, Ti0.05%, Cr 0.075%, Yb 0.015%, Te 0.03%, Be 0.1%, Fe ≤0.15%, and more The amount is Al and other unavoidable impurity elements. The individual content of other impurity elements is less than 0.05%, and the total amount is less than 0.15%. The semi-solid die-casting high thermal conductivity aluminum alloy die casting method includes the following steps:

[0055] The first step: According to the percentage of aluminum alloy composition, select Al10Ti alloy, Al5Cr1Yb alloy, Al5Te alloy, Al5Be alloy and aluminum ingot with purity of 99.7%, 99.9% of instant silicon and 99.95% of magnesium ingot as raw materials for ingredients;

[0056] Step 2: Heat and melt the aluminum ingot at 700°C, and then add 7.4% instant silicon, 0.2% magnesium ingot, 0.5% Al10Ti alloy, 1.5% Al5Cr1Yb alloy, 0.6% Al5Te alloy and 2% Al5Be alloy, stir and melt into aluminum allo...

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Abstract

Disclosed are semi-solid die-cast high-thermal-conductivity aluminum alloy and a die-casting method thereof. The components of the aluminum alloy comprise, by mass percentage, 6.6-7.4% of Si, 0.15-0.25% of Mg, 0.03-0.05% of Ti, 0.05-0.1% of Cr, 0.01-0.02% of Yb, 0.01-0.03% of Te, 0.05-0.1% of Be, 0.15% or less of Fe, and the balance Al and unavoidable other impurity elements. The die-casting method includes the steps of burdening, smelting of molten aluminum alloy, preparation of semi-solid slurry, semi-solid die-casting, and solid solution and aging heat treatment. By optimizing the contentsof main alloy elements Si and Mg as well as refining alpha-Al grains, a metamorphic Fe-rich phase and an eutectic Si phase, the aluminum alloy is made to have high thermal conductivity, high strengthand excellent semi-solid die-casting forming performance, and be suitable for semi-solid die-casting of various parts with high heat dissipation performance requirements, for example, wireless communication base station shells, heat dissipation substrates, electronic equipment shells and electric appliance heating plates.

Description

Technical field [0001] The invention belongs to the technical field of aluminum alloy die-casting, and specifically relates to a semi-solid die-casting high thermal conductivity aluminum alloy and a die-casting method thereof. Background technique [0002] Aluminum alloy has the characteristics of light weight, good toughness, corrosion resistance and unique metallic luster. It is widely used in electronic appliances, communication equipment, lighting devices, power tools, new energy vehicles and other fields, such as smart phones, laptops, tablet computers Shells of electronic products, heat dissipation backplanes and lampshades of LED lights, heat dissipation substrates, filters and cabinet shells of wireless communication base stations, heating plates of rice cookers, induction cookers, and water heaters, power battery shells of new energy vehicles, control power supply chassis, and drivers Motor housing, etc. With the continuous increase of the power of various heating devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03B22D17/00C22F1/043
CPCB22D17/007C22C1/026C22C1/03C22C21/02C22F1/002C22F1/043
Inventor 王顺成康跃华宋东福杨莉
Owner GUANGDONG INST OF NEW MATERIALS