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Technological method for improving heat conductivity of die-casting aluminum alloy

A process method and technology for casting aluminum alloys, applied in the field of die-casting aluminum alloy materials, can solve the problem of low thermal conductivity of aluminum alloy products, and achieve the effects of improving continuity, improving thermal conductivity and reducing defects

Active Publication Date: 2021-03-19
重庆慧鼎华创信息科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a process for improving the thermal conductivity of die-casting aluminum alloys, so as to solve the problem that the thermal conductivity of aluminum alloy products obtained by the existing die-casting process is not high

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with embodiment.

[0029] 1. A process for improving the thermal conductivity of die-casting aluminum alloys

[0030] 1) Aluminum alloy samples were obtained by vacuum die casting using a die casting machine. Among them, the vacuum degree in the die-casting process is not greater than 100mba, the temperature of the aluminum liquid in the die-casting process is controlled at 650°C~670°C, and the die-casting speed of the aluminum alloy sample is controlled as follows: the low speed is 0.18~0.23m / s, and the high speed is 2.8~3.5 m / s. The casting specific pressure is 60~100MPa, the casting cooling time is 8~12s, and the die casting cycle time is 38~45s.

[0031] 2) Perform heat treatment on the aluminum alloy sample obtained in step 1), heat it to 200°C~330°C and keep it warm for 2~4h, then cool it down to obtain a high thermal conductivity aluminum alloy product. Wherein, the heating temperature in the...

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Abstract

The invention discloses a technological method for improving the heat conductivity of a die-casting aluminum alloy. The technological method comprises the following steps of 1) using a die-casting machine for obtaining an aluminum alloy sample through vacuum die-casting; and 2) carrying out heat treatment on the aluminum alloy sample obtained in the step 1), heating the aluminum alloy sample to 200 DEG C and 330 DEG C, carrying out heat preservation for 2-4 hours, and then cooling to obtain a high-heat-conductivity aluminum alloy product. Gas in molten metal is exhausted through vacuum die casting, holes in the product obtained through pressure casting are greatly reduced, the product obtained after die casting is subjected to heat treatment, the phenomena of lattice distortion, point defects, line defects and the like existing in the product are eliminated, the continuity in the product is improved, and therefore the heat conductivity of the product is improved.

Description

technical field [0001] The invention relates to the technical field of die-casting aluminum alloy materials, in particular to a process method for improving the thermal conductivity of die-casting aluminum alloys. Background technique [0002] At present, 3C products, automotive communication electronics and other fields are facing increasing pressure to reduce weight. At the same time, some components often have higher requirements on the thermal conductivity of materials (especially heat dissipation devices), so as to ensure and improve the service life and working stability of the product. [0003] Aluminum alloy has good comprehensive properties, and its advantages such as low density, high strength, good electrical and thermal conductivity, and simple processing can better meet the product structure and heat dissipation requirements, so it is widely used in the fields of automobiles, electronics, and communications. The thermal conductivity of pure aluminum at room tem...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/043B22D17/00B22D21/04
CPCC22F1/043B22D17/00B22D21/04
Inventor 宋成猛
Owner 重庆慧鼎华创信息科技有限公司