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High-strength high-heat-conductivity 6-series aluminum alloy strip and preparation method thereof

A high thermal conductivity, aluminum alloy strip technology, applied in the field of non-ferrous metals, can solve the problems of incompatibility between thermal conductivity and strength, non-product production methods and processes, restrictions on the development and use of aluminum alloys, etc., to achieve high strength and good surface quality , the effect of smooth plate shape

Inactive Publication Date: 2018-09-14
中铝东南材料院(福建)科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are still deficiencies in the current use of aluminum alloy materials, which are mainly reflected in the incompatibility between thermal conductivity and strength.
In the production process, either the strength is sacrificed to ensure high thermal conductivity, or the thermal conductivity is sacrificed to ensure high strength, which limits the development and use of aluminum alloys
For example: the current 1-series aluminum alloy has the best thermal conductivity, the maximum thermal conductivity can reach 210W / (m K), but the maximum strength can only be below 200MPa; the 5-series or even 7-series aluminum alloy has the highest strength, but its thermal conductivity Poor, generally at 130W / (m·K)
[0004] At present, domestic high-strength and high-thermal conductivity 6-series aluminum alloy strips are all imported from abroad, and there is no production method and process for this product in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The composition of a high-strength and high-thermal-conductivity 6-series aluminum alloy strip is: Si 0.35%, Fe 0.05%, Cu 0.03%, Mn 0.01%, Mg 0.45%, Cr 0.03%, Zn 0.01%, Ti 0.012%, the balance is Al and unavoidable impurities.

[0033] The preparation method of the 6-series aluminum alloy strip with high strength and high thermal conductivity is as follows:

[0034] 1) Put the pure aluminum ingots, aluminum intermediate alloy ingots, magnesium ingots and manganese agent prepared in the above weight ratio into the melting furnace, and after melting, refining, slag removal and stirring at 720 ° C, the formed aluminum The solution was placed in a static furnace for 1.5 h;

[0035] 2) At 710°C, add 20ppm of Al-5Ti-0.2B grain refiner to molten aluminum, and fill it with argon gas with a purity ≥ 99.999% for refining, then use a low-level semi-continuous casting method to cast Refined molten aluminum is cast into an aluminum alloy flat ingot with a thickness of 560mm×width 1...

Embodiment 2

[0044] The composition of a high-strength and high-thermal conductivity 6-series aluminum alloy strip is: Si 0.50%, Fe 0.03%, Cu 0.05%, Mn 0.02%, Mg 0.40%, Cr 0.01%, Zn 0.015%, Ti 0.03%, the balance is Al and unavoidable impurities.

[0045] The preparation method of the 6-series aluminum alloy strip with high strength and high thermal conductivity is as follows:

[0046] 1) Put the pure aluminum ingots, aluminum intermediate alloy ingots, magnesium ingots and manganese agent prepared in the above weight ratio into the melting furnace, and melt, refine, remove slag and stir at 730 ° C, and the formed aluminum The solution was placed in a static furnace for 2.0 h;

[0047] 2) At 690°C, add 80ppm of Al-5Ti-0.2B grain refiner to molten aluminum, and fill it with argon gas with a purity ≥ 99.999% for refining, then use a low-level semi-continuous casting method to cast Refined molten aluminum is cast into an aluminum alloy flat ingot with a thickness of 520mm×width 1300mm×length...

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Abstract

The invention discloses a high-strength high-heat-conductivity 6-series aluminum alloy strip and a preparation method thereof. The high-strength high-heat-conductivity 6-series aluminum alloy strip comprises, by mass, 0.20-0.55% of Si, 0.03-0.08% of Fe, 0.01-0.10% of Cu, 0.01-0.02% of Mn, 0.40-0.80% of Mg, 0.01-0.10%fo Cr, 0.01-0.02% of Zn, 0.01-0.03% of Ti, and the balance Al and inevitable impurities, wherein aluminum ingots, aluminum intermediate alloy ingots, magnesium ingots and manganese additives serve as raw materials, and the high-strength high-heat-conductivity 6-series aluminum alloy strip is prepared through the steps of melting, casting, soaking, hot rolling, cold rolling, solid treatment, stretch straightening, ageing treatment and the like. By controlling alloy chemical components and optimizing technological parameters, the prepared 6-series aluminum alloy strip has the advantages of high surface quality, smooth strip shape, high strength, good in formability and high heat conduction performance, and the overseas technical monopoly in this aspect is broken.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metals, and in particular relates to a 6-series aluminum alloy strip with high strength and high thermal conductivity and a preparation method thereof. Background technique [0002] With the development of modern science and technology, people's demand for smart phones, mobile iPads, notebooks and other electronic products is increasing. At the same time, all kinds of equipment and electronic products are developing towards the trend of intelligence and miniaturization. It is hoped that the materials will be made thinner and thinner, so as to obtain the characteristics of lightness and speed, which are convenient for people to use and carry; at the same time, smart phones and notebook materials In the process of use, since the internal heat cannot be channeled to the outside, it is easy to affect the user's experience and the life of the equipment. This will inevitably require the development o...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C21/02C22C1/03C22F1/05C22F1/02
CPCC22C21/08C22C1/026C22C1/03C22C21/02C22F1/02C22F1/05
Inventor 刘华春吴建新江钟宇冉继龙吴云林盛
Owner 中铝东南材料院(福建)科技有限公司
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