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A kind of cast aluminum-silicon alloy with high thermal conductivity and preparation method thereof

A technology of casting aluminum-silicon alloy with high thermal conductivity, which is applied in the field of metal materials, can solve problems such as thermal conductivity gap, achieve the effects of improving fluidity and castability, increasing alloy strength and corrosion resistance, and increasing resistance

Active Publication Date: 2021-04-20
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also the commonly used die-casting aluminum alloy ADC12, the content of silicon is 12% at the eutectic point, and its thermal conductivity in the as-cast state is only 96W / (m·K), which is comparable to that of Al-Mg-Si deformed aluminum alloy. certain gap

Method used

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  • A kind of cast aluminum-silicon alloy with high thermal conductivity and preparation method thereof
  • A kind of cast aluminum-silicon alloy with high thermal conductivity and preparation method thereof
  • A kind of cast aluminum-silicon alloy with high thermal conductivity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A cast aluminum-silicon alloy with high thermal conductivity, composed of the following elements by weight: Si: 3.3%, Cu: 0.10%, Mg: 0.26%, Zn: 0.08%, Ti: 0.05%, B: 0.2%, others The total sum of impurities is not more than 0.02%, and the balance is Al.

[0026] The preparation method of the cast aluminum-silicon alloy with high thermal conductivity comprises the following steps:

[0027] 1) Drying: Select pure aluminum ingots with a purity greater than 99.5%, Al-Si master alloys, Al-Cu master alloys, magnesium ingots with a purity greater than 99.5%, zinc ingots with a purity greater than 99.5%, and Al-Ti-B fines according to the composition of the elements. Chemical agent is used as raw material, and the raw material is dried at 100°C;

[0028] 2) Melting: first use the well-type crucible resistance furnace to melt the pure aluminum ingot, when the temperature of the pure aluminum liquid reaches 900 ℃, then add the Al-Si master alloy, after the Al-Si master alloy is c...

Embodiment 2

[0032] A cast aluminum-silicon alloy with high thermal conductivity, composed of the following elements by weight percentage: Si: 3.9%, Cu: 0.3%, Mg: 0.38%, Zn: 0.04%, Ti: 0.12%, B: 0.12%, others The total sum of impurities is not more than 0.02%, and the balance is Al.

[0033] The preparation method of the cast aluminum-silicon alloy with high thermal conductivity comprises the following steps:

[0034] 1) Drying: Select pure aluminum ingots with a purity greater than 99.5%, Al-Si master alloys, Al-Cu master alloys, magnesium ingots with a purity greater than 99.5%, zinc ingots with a purity greater than 99.5%, and Al-Ti-B fines according to the composition of the elements. Chemical agent is used as raw material, and the raw material is dried at 100°C;

[0035] 2) Melting: first use the well-type crucible resistance furnace to melt the pure aluminum ingot, when the temperature of the pure aluminum liquid reaches 850°C, then add the Al-Si master alloy, and then add the Al-Si...

Embodiment 3

[0039] A cast aluminum-silicon alloy with high thermal conductivity, composed of the following elements by weight percentage: Si: 5.5%, Cu: 0.4%, Mg: 0.70%, Zn: 0.1%, Ti: 0.2%, B: 0.05%, others The total sum of impurities is not more than 0.02%, and the balance is Al.

[0040] The preparation method of the cast aluminum-silicon alloy with high thermal conductivity comprises the following steps:

[0041] 1) Drying: Select pure aluminum ingots with a purity greater than 99.5%, Al-Si master alloys, Al-Cu master alloys, magnesium ingots with a purity greater than 99.5%, zinc ingots with a purity greater than 99.5%, and Al-Ti-B fines according to the composition of the elements. Chemical agent is used as raw material, and the raw material is dried at 100°C;

[0042] 2) Melting: first use the well-type crucible resistance furnace to melt the pure aluminum ingot, when the temperature of the pure aluminum liquid reaches 880 ℃, then add the Al-Si master alloy, after the Al-Si master a...

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Abstract

The invention discloses a cast aluminum-silicon alloy with high thermal conductivity and a preparation method thereof. The cast aluminum-silicon alloy with high thermal conductivity is composed of the following elements in weight percent: Si: 3.3%-5.5%, Cu: 0.1%-0.40% , Mg: 0.26%-0.70%, Zn: 0.04%-0.1%, Ti: 0.05%-0.2%, B: 0.05%-0.2%, the total sum of other impurities is not more than 0.02%, and the balance is Al. The elements of the invention are effectively combined through specific process steps under the condition of a specific alloy composition ratio, and can be formed at one time to produce a cast aluminum-silicon alloy with a thermal conductivity of 172‑190W / (m∙k), achieving good casting performance On the basis of , mechanical properties and heat treatment properties, the thermal conductivity of cast aluminum-silicon alloys is significantly improved. The cast aluminum-silicon alloy with high thermal conductivity prepared by the invention has important application value, and can be widely used in the fields of automobiles, communications and electronic equipment, and can also be used in heat conduction devices, heat dissipation shells, etc., and its excellent heat transfer efficiency can promote the effective use of energy. use to reduce energy consumption.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a cast aluminum-silicon alloy with high thermal conductivity and a preparation method thereof. Background technique [0002] The thermal conductivity of pure Al is second only to Au, Ag and Cu, which is 237W / (m·K). Al has the advantages of low price, low specific gravity, easy surface treatment, and high content in the earth's crust. Al-Si alloy is an important casting alloy. Due to its environmental protection, excellent casting performance, strong welding performance, good fluidity, good electrical and thermal conductivity, long life cycle and high recycling rate, etc., It is widely used in the field of heat dissipation components. With the development of the communication industry and electronic equipment, some electronic products, LED lighting equipment, and heat dissipation housings for communication base stations tend to be miniaturized and lightweight...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/03C22C1/06C22F1/043
CPCC22C1/026C22C1/03C22C1/06C22C21/02C22F1/002C22F1/043
Inventor 李元东王慧罗晓梅马颖陈体军
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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