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Purification method of aluminum alloy for heat dissipation

An aluminum alloy and alloy technology, applied in the alloy field, can solve problems such as limiting heat dissipation performance and lack of aluminum alloy materials, and achieve the effects of facilitating heat conduction, improving heat dissipation performance, and improving heat dissipation performance

Inactive Publication Date: 2019-04-05
安徽鑫铂铝业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the improvement of the thermal conductivity of aluminum profiles in the existing technology is often improved from the structure and appearance. Although some excellent results have been achieved, there is still a lack of good aluminum alloy materials for radiators, and the relatively high content of impurities and Gas is often the main factor limiting its thermal performance

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  • Purification method of aluminum alloy for heat dissipation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for purifying aluminum alloy for heat dissipation, comprising the following steps:

[0020] S1. Put the aluminum alloy to be treated in a resistance furnace, first preset the temperature of the resistance furnace to 260°C, keep it for 1.5 hours, adjust the temperature to 450°C, keep it for 0.7 hours, and finally raise the temperature to 780°C to obtain an alloy melt;

[0021] S2. After removing the slag, use a bell jar to press the refining agent to the bottom of the alloy melt, rotate and stir for 20 minutes, stop stirring when the alloy melt emerges with slag inclusions, and let stand for 30 minutes after removing the slag inclusions; the refining The agent is composed of the following raw materials in parts by weight: sodium hexafluoroaluminate: 2 parts, sodium chloride: 13 parts, potassium chloride: 13 parts, C 2 Cl 6 : 4 parts, lanthanum fluoride: 1 part, melamine: 0.6 parts;

[0022] S3. Casting after removing the slag again from the molten alloy in S2....

Embodiment 2

[0024] A method for purifying aluminum alloy for heat dissipation, comprising the following steps:

[0025] S1. Put the aluminum alloy to be processed in a resistance furnace, first preset the temperature of the resistance furnace to 300°C, keep it for 1 hour, adjust the temperature to 500°C, keep it for 0.5 hours, and finally raise the temperature to 800°C to obtain an alloy melt;

[0026] S2. After removing the slag, use a bell jar to press the refining agent to the bottom of the alloy melt, rotate and stir for 30 minutes, stop stirring when the alloy melt appears slag inclusions, and let stand for 40 minutes after removing the slag inclusions; the refining The agent is composed of the following raw materials in parts by weight: sodium hexafluoroaluminate: 3 parts, sodium chloride: 14 parts, potassium chloride: 14 parts, C 2 Cl 6 : 5 parts, praseodymium fluoride and terbium fluoride: 2 parts, melamine: 1 part;

[0027] S3. Casting after removing the slag again from the mol...

Embodiment 3

[0029] A method for purifying aluminum alloy for heat dissipation, comprising the following steps:

[0030] S1. Put the aluminum alloy to be processed in a resistance furnace, first preset the temperature of the resistance furnace to 200°C, keep it for 2 hours, adjust the temperature to 400°C, keep it for 1 hour, and finally raise the temperature to 750°C to obtain an alloy melt;

[0031] S2. After removing the slag, use a bell jar to press the refining agent to the bottom of the alloy melt, rotate and stir for 10 minutes, stop stirring when the alloy melt appears slag inclusions, and let stand for 20 minutes after removing the slag inclusions; the refining The agent is composed of the following raw materials in parts by weight: sodium hexafluoroaluminate: 1.5 parts, sodium chloride: 12 parts, potassium chloride: 12 parts, C 2 Cl 6 : 5 parts, neodymium fluoride: 2 parts, melamine: 1 part;

[0032] S3. Casting after removing the slag again from the molten alloy in S2.

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Abstract

The invention discloses a purification method of aluminum alloy for heat dissipation. The purification method comprises the following steps of (1) placing the aluminum alloy to be processed in a resistance furnace, and raising the temperature to 750-800 DEG C to obtain an alloy melt; (2) pressing a refining agent to the bottom of the alloy melt through a bell jar after slag removal, performing rotating and stirring, stopping stirring when slag containing objects emerge in alloy molten liquid, removing the slag containing objects, and then keeping the standing state for 20-40 min; and (3) carrying out slag removal on the alloy molten liquid processed in the step (2) and then performing casting. According to the technical scheme, aluminum alloy materials are effectively purified to remove impurities and gas, so that the heat dissipation performance of the aluminum alloy is effectively improved.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a method for purifying aluminum alloys for heat dissipation. Background technique [0002] As a heat conductor, the heat transfer coefficient is an important parameter to evaluate the heat dissipation performance of the heat sink, and the heat conductivity of its constituent materials directly affects its heat dissipation effect. With the rapid development of contemporary science and technology, the performance requirements of radiators are getting higher and higher. With many advantages such as good thermal conductivity, formability and relatively low price, aluminum alloy has become the main material for the production of heat sinks, and is now widely used. [0003] In all aluminum alloy series, 1××× series and 6××× series alloys have better thermal conductivity, but due to the complex cross-sectional shape of the heat sink and the requirements for subsequent processing, the he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C1/02C22C21/00
CPCC22C1/026C22C1/06C22C21/00
Inventor 唐开健李杰王超李亨
Owner 安徽鑫铂铝业股份有限公司