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Aluminium alloy material, aluminium alloy shaped part, and preparation method of aluminium alloy shaped part

A technology of aluminum alloy materials and formed parts, applied in the field of aluminum alloy materials, can solve problems such as heat generation, poor heat dissipation of products, and low thermal conductivity, and achieve the effect of improving thermal conductivity, high thermal conductivity, high thermal conductivity and mechanical properties

Active Publication Date: 2016-06-22
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the first aspect of the embodiment of the present invention provides an aluminum alloy material, which has high thermal conductivity, good formability and mechanical properties, and is used to solve the structure used in communication products or communication terminal products in the prior art. The thermal conductivity of the material is not high, resulting in poor heat dissipation of the product and serious heating problems

Method used

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preparation example Construction

[0061] In a third aspect, an embodiment of the present invention provides a method for preparing an aluminum alloy formed part, comprising the following steps:

[0062] According to the composition ratio of aluminum alloy materials, first add pure aluminum ingots into the melting furnace, then add crystalline silicon after the aluminum ingots are melted, and add pure magnesium or Al-Mg master alloy, chromium source and Al-B after the crystalline silicon is melted The master alloy is smelted, and then the Al-Sr master alloy is added after it is completely melted, and after refining and degassing treatment, it is processed and formed to obtain an aluminum alloy formed part, and the aluminum alloy formed part is composed of the following components in mass percentage: Silicon 5.5-8.5%; Magnesium 0.1-0.4%; Boron 0.01-0.2%; Chromium <0.05%; Iron 0.05-0.5%; Strontium <0.1%; %.

[0063] In the embodiment of the present invention, the chromium source includes Al-10% Cr master alloy, ...

Embodiment 1

[0086] A method for preparing an aluminum alloy formed part, comprising the following steps:

[0087] According to the mass percentage of the added materials in the total material, the materials are prepared: 6.5% of crystalline silicon with a purity of more than 99%, 0.3% of industrial pure magnesium, 2.5% of AL-3%B rod-shaped master alloy, 0.07% of Al-10% Cr master alloy, 0.8% Al-10% Sr master alloy, the rest is A00 industrial pure aluminum.

[0088] Put the above-mentioned A00 industrial pure aluminum into the furnace, heat and melt it and raise the temperature to 800°C, add crystalline silicon and stir, after the crystalline silicon is melted, cool the melt to 750°C and add pure magnesium, Al-10%Cr Stir the master alloy and Al-3%B master alloy. After they are all melted, cool the melt down to 730°C and add Al-10%Sr master alloy and stir for 3 minutes, then use argon gas and commercial refining agent for degassing and refining at 730°C for 10 Minutes, remove the slag after...

Embodiment 2

[0090] A method for preparing an aluminum alloy formed part, comprising the following steps:

[0091] According to the mass percentage of the added materials in the total material, the materials are prepared: 7.7% of the purity is more than 99% of crystalline silicon, 0.37% of industrial pure magnesium, 2.5% of AL-3%B rod-shaped master alloy, 0.1% of Al-10% Cr master alloy, 0.8% Al-10% Sr master alloy, the rest is A00 industrial pure aluminum.

[0092] Put the above-mentioned A00 industrial pure aluminum into the furnace, heat and melt it and raise the temperature to 800°C, add crystalline silicon and stir, after the crystalline silicon is melted, cool the melt to 750°C and add pure magnesium, Al-10%Cr Stir the master alloy and Al-3%B master alloy. After they are all melted, cool the melt down to 730°C and add Al-10%Sr master alloy and stir for 3 minutes, then use argon gas and commercial refining agent for degassing and refining at 730°C for 10 Minutes, remove the slag after...

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Abstract

The invention provides an aluminium alloy material. The aluminium alloy material is composed of, by mass, 5.5 to 8.5% of silicon, 0.1 to 0.4% of magnesium, 0.01 to 0.2% of boron, chromium<0.05%, 0.05 to 0.5% of iron, strontium<0.1%, and aluminium and inevitable impurities, wherein the content of each impurity element is less than 0.05%. The aluminium alloy possesses high heat-conducting properties, and excellent forming properties, and mechanical properties; thermal conductivity is higher than 140W / m.k under common pressure casting conditions; thermal conductivity is even higher than 150W / m.k under gravity casting or extrusion casting conditions; the aluminium alloy can be applied to the field of mobile phone product and communication product, can be used for solving problems in the prior art that thermal conductivity properties of materials used in mobile phone products and communication products are poor, product heat dissipation performance is poor, and severe heating phenomenon is caused. The invention also provides an aluminium alloy shaped part prepared from the aluminium alloy, and a preparation method of the aluminium alloy shaped part.

Description

technical field [0001] The invention relates to the field of aluminum alloy materials, in particular to an aluminum alloy material, an aluminum alloy formed part and a preparation method thereof. Background technique [0002] With the rapid development of the communication industry, people have higher and higher requirements on the heat dissipation performance of communication products. However, in current communication products, such as stainless steel and magnesium alloy, the commonly used materials for the middle frame of mobile phones are low thermal conductivity. Therefore, the heat dissipation effect of mobile phones commonly seen at home and abroad is relatively poor, and consumers generally feel the phenomenon of heat or even heat during use; at the same time, in the field of communication products, the thermal conductivity of traditional ADC12 die-casting aluminum alloy is only About 90~105W / m.k, which cannot meet the increasing power consumption requirements, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03H04M1/02
CPCC22C1/03C22C21/02H04M1/02
Inventor 蔡明许德英李绍康彭淳
Owner HUAWEI TECH CO LTD
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