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High-heat-conductivity high-corrosion-resistance cast aluminum alloy and preparation method thereof

A casting aluminum alloy, high corrosion resistance technology, applied in the field of aluminum alloy, can solve the problems of unfavorable corrosion resistance improvement, achieve the effect of improving shape and distribution, high strength, and improving corrosion resistance

Active Publication Date: 2019-04-19
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of excessive alloy phase, it will promote the occurrence of electrochemical corrosion, which is not conducive to the improvement of corrosion resistance.

Method used

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  • High-heat-conductivity high-corrosion-resistance cast aluminum alloy and preparation method thereof
  • High-heat-conductivity high-corrosion-resistance cast aluminum alloy and preparation method thereof
  • High-heat-conductivity high-corrosion-resistance cast aluminum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Example 1 Al-7Si-0.6Fe-0.5Zn-0.05B-0.15Sr-0.2RE alloy

[0064] In this example, B, Sr and RE components are compounded on the basis of Comparative Example 2, wherein RE is mixed rare earths containing Ce and La (Ce / La mass ratio is 6 / 4). The raw materials used in formulating alloys include: industrial pure aluminum, pure zinc, Al-Si, Al-Fe, Al-B, Al-Sr and Al-RE master alloys. The material composition percentage is: Si: 7%, Fe: 0.6%, Zn: 0.5%, B: 0.05%, Sr: 0.05%, RE: 0.2%, and the balance is Al.

[0065] The alloy melting and preparation process and its parameters are as follows:

[0066] (1) Melting aluminum alloy at high temperature. The specific steps are:

[0067] According to the composition ratio requirements, first weigh industrial pure aluminum, Al-Si, and Al-Fe intermediate alloy raw materials, melt the aluminum alloy containing Si and Fe, the melting temperature is 730 ° C, stir for 20 minutes, and let it stand to cool down to 700 ° C.

[0068] (2) alloyi...

Embodiment 2

[0078] Example 2 Al-9Si-0.6Fe-0.6Zn-0.3Co-0.1B-0.15Sr-0.2RE alloy

[0079] The alloy system of this embodiment is that the element Co is added on the basis of the alloy composition in the embodiment 1, and the composition of other elements is the same, the difference is that the content of each component is different.

[0080] The raw materials used for formulating alloys include: industrial pure aluminum, pure zinc, Al-Si, Al-Fe, Al-Co, Al-B, Al-Sr and Al-RE master alloys, wherein RE is mixed rare earth containing Ce and La ( The Ce / La mass ratio is 6 / 4). The composition percentage of the material is: Si: 9%, Fe: 0.6%, Zn: 0.6%, Co: 0.3%, B: 0.1%, Sr: 0.15%, RE: 0.2%, and the balance is Al.

[0081] The specific smelting process of this embodiment is similar to that of Embodiment 1. The difference is that the Co element is added, and the processing parameters are different.

[0082] The alloy melting and preparation process and its parameters are as follows:

[0083] (1) ...

Embodiment 3

[0095] Example 3 Al-7Si-0.6Fe-0.5Zn-0.2Co-0.05B-0.15Sr-0.2Ce alloy

[0096] The alloy system of this embodiment is similar to the composition of alloy elements in embodiment 2, the difference is that the RE element is Ce, and the content of each component is different. The raw materials used for formulating alloys include: industrial pure aluminum, pure zinc, Al-Si, Al-Fe, Al-Co, Al-B, Al-Sr and Al-Ce master alloys. The composition percentage of the material is: Si: 7%, Fe: 0.6%, Zn: 0.5%, Co: 0.2%, B: 0.05%, Sr: 0.05%, Ce: 0.2%, and the balance is Al.

[0097] The alloy smelting and preparation process of this embodiment is similar to that of Embodiment 2. The difference is that the processing parameters are different.

[0098] The alloy melting and preparation process and its parameters are as follows:

[0099] 1) High temperature melting aluminum alloy

[0100] According to the composition ratio requirements, first weigh industrial pure aluminum, Al-Si, Al-Fe and Al-Co ...

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Abstract

The invention discloses high-heat-conductivity high-corrosion-resistance cast aluminum alloy and a preparation method thereof. The high-heat-conductivity high-corrosion-resistance cast aluminum alloycomprises the raw material components of, by weight, 7-9% of Si, 0.6-1.0% of Fe, 0.2-0.6% of Zn, 0.1-0.5% of Co, 0.05-0.15% of B, 0.2-0.5% of RE, 0.05-0.2% of Sr and the balance Al. In the preparationprocess, the aluminum alloy containing the elements of Si, Fe and Co is melted at the high temperature at first, and then is subjected to still standing and cooled; pure Zn, Al-RE intermediate alloy,Al-B intermediate alloy and Al-Sr intermediate alloy are added into the melt for further alloying; and the melt is subjected to refining and slag removal, and molding is achieved through casting. According to the alloy preparation process, the technology effect is remarkable, the Co, B, Sr and RE multi-element compound synergistic effect is sufficiently realized, and thus, the alloy casting piecehas the excellent heat conductivity, high mechanical property and good corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a cast aluminum alloy with high thermal conductivity and high corrosion resistance and a preparation method thereof. Background technique [0002] Aluminum and its alloys have become the second largest metal structural materials next to steel materials due to their significant advantages such as low density, high specific strength, and easy forming and processing. Among the forming methods of aluminum alloy products, casting is the most common and lowest-cost process. Among them, die-casting has the advantages of high production efficiency, fast filling speed, and easy forming of complex thin-walled castings. It is widely used in the production of communication base station components. . [0003] In wireless communication, the transmission and transmission of signals are mainly realized through the outdoor base station. The signal processor is located in the sealed cavit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03C22C1/06C22F1/04
CPCC22C1/026C22C1/03C22C1/06C22C21/02C22F1/04
Inventor 杜军甘俊旗吴东方温澄
Owner SOUTH CHINA UNIV OF TECH
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