Preparation process of high-thermal-conductivity eutectic aluminum alloy material

A technology of aluminum alloy material and preparation process, applied in the field of eutectic aluminum alloy material preparation, can solve the problems of affecting the fluidity of the alloy, the attenuation of the effective residual amount of Sr element, and the inability to maintain the thermal conductivity stably, and achieve the effect of guaranteeing the production capacity and performance.

Inactive Publication Date: 2020-08-25
南通鸿劲金属铝业有限公司
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Problems solved by technology

At present, conventional production mainly reduces the content of a small amount of silicon, sacrifices part of the fluidity properties, and uses Al-Sr and Al-Ca master alloys to modify the eutectic silicon of AlSi12Fe alloys with two elements, which can greatly improve the alloy’s thermal conductivity. However, since the Sr element is very easy to oxidize to produce oxide impurities and serious burning loss, the effective residual amount of the Sr element is severely attenuated, resulting in the thermal conductivity of the product cannot be maintained stably, and the Ca element will seriously affect the alloy as it exceeds 50ppm. Fluidity is very unfavorable for precision die-casting of products

Method used

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Embodiment Construction

[0017] The physical nature of thermal and electrical conduction of metal materials is that the movement of free electrons plays a leading role. The theory of metal conduction believes that the more complete the crystal of the metal, the less defects such as lattice distortion and grain boundaries caused by heterogeneous atoms, the smaller the hindrance to electron movement, the better the conductivity, and the higher the conductivity of the same material, the better its thermal conductivity. The performance must be better. The measurement technology of electrical conductivity of root materials is far more mature than that of thermal conductivity. In many cases, the data of thermal conductivity of metal materials is obtained through electrical conductivity calculation. Therefore, there are many studies on the conductivity of aluminum alloys, and the conductivity can be used to indirectly characterize the deterioration, aging, and casting defect levels of aluminum alloys. Accor...

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Abstract

The invention discloses a preparation process of a high-thermal-conductivity eutectic aluminum alloy material, and belongs to the technical field of eutectic aluminum alloy material preparation. According to the preparation process, a nanoscale seed crystal refiner adding and filtering purification process is added in the preparation process, so that the effective residual amount of the B elementand the purity of molten aluminum are controlled, aluminum alloy is fully refined, the B element in the aluminum alloy does not have oxidation and burning loss phenomena, a product has a long-acting and stable effect, by fully filtering and purifying high-temperature molten aluminum alloy, harmful impurities in the product are effectively controlled, the product performance is effectively guaranteed, intermediate modifiers and refiners do not need to be added again in the die-casting process, and the process has the excellent characteristics of being efficient and rapid.

Description

technical field [0001] The invention belongs to the technical field of preparation of eutectic aluminum alloy materials, and in particular relates to a preparation process of eutectic aluminum alloy materials with high thermal conductivity. Background technique [0002] With the rapid development of industries such as electronic information and communication appliances, consumer electronics products such as LED lighting equipment, communication base station radio frequency units, etc. have a tendency to develop in the direction of high integration, miniaturization and light weight. The application of new materials and structural optimization design have become the key to improving the heat dissipation capacity of equipment and reducing system temperature. Due to its excellent thermal conductivity, machinability, low cost, environmental friendliness and low density, it can maintain a high heat dissipation capacity of the equipment and realize the miniaturization and light wei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/03C22C1/06
CPCC22C1/026C22C1/03C22C1/06C22C21/04
Inventor 程汉明姜鹏飞
Owner 南通鸿劲金属铝业有限公司
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