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A kind of high-strength aluminum alloy and preparation method thereof

An aluminum alloy, high-strength technology, applied in the field of aluminum alloy, can solve the problems of performance degradation, welding performance, deterioration of corrosion resistance, increase in the number of crystal phases, etc.

Active Publication Date: 2016-05-11
FUJIAN MINFA ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various impurity elements added to high-strength aluminum alloys react with aluminum. Due to the unreasonable design of the amount of impurities added, various intermediate compounds are often formed, such as Al 20 Cu 2 mn 3 , so that the effective content of strengthening elements in the alloy is correspondingly reduced, and for example, the content ratio of Zn and Mg in the alloy is too high, which will easily increase the number of insoluble crystal phases, resulting in a sharp increase in the performance related to fracture toughness. Reduced, welding performance, corrosion resistance significantly deteriorated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A high-strength aluminum alloy consisting of the following raw materials in weight percentage:

[0049] Fe: 0.10%

[0050] Mn: 0.03%

[0051] Si: 0.02%

[0052] Ti: 0.06%

[0053] B: 0.09%

[0054] Zn: 2.9%

[0055] Mg: 0.9%

[0056] Cu: 1.1%

[0057] Ce: 0.5%

[0058] Sc: 0.1%

[0059] Al: 94.2%.

[0060] Its preparation method includes batching and heat treatment process. The batching process is to mix the raw materials of the above components. The heat treatment process includes solid solution, quenching, cold compression, and aging treatment. The solution treatment temperature is 450°C. The cold compression is 3%, and the aging treatment is 150℃×5h+185℃×11h.

Embodiment 2

[0062] A high-strength aluminum alloy consisting of the following raw materials in weight percentage:

[0063] Fe: 0.12%

[0064] Mn: 0.03%

[0065] Si: 0.03%

[0066] Ti: 0.02%

[0067] B: 0.05%

[0068] Zn: 2.5%

[0069] Mg: 0.9%

[0070] Cu: 1.1%

[0071] Ce: 0.6%

[0072] Sc: 0.2%

[0073] Al: 95.55%.

[0074] Its preparation method includes batching and heat treatment process. The batching process is to mix the raw materials of the above components. The heat treatment process includes solid solution, quenching, cold compression, and aging treatment. The solution treatment temperature is 453°C. The cold compression is 3%, and the aging treatment is 150℃×5h+185℃×11h.

Embodiment 3

[0076] A high-strength aluminum alloy consisting of the following raw materials in weight percentage:

[0077] Fe: 0.12%

[0078] Mn: 0.03%

[0079] Si: 0.03%

[0080] Ti: 0.06%

[0081] B: 0.06%

[0082] Zn: 2.5%

[0083] Mg: 1.0%

[0084] Cu: 1.3%

[0085] Ce: 0.7%

[0086] Sc: 0.1%

[0087] Al: 94.09%.

[0088] Its preparation method includes batching and heat treatment process. The batching process is to mix the raw materials of the above components. The heat treatment process includes solid solution, quenching, cold compression, and aging treatment. The solution treatment temperature is 455°C. The cold compression is 3%, and the aging treatment is 150℃×5h+185℃×11h.

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Abstract

The invention relates to aluminum alloy and provides high-strength aluminum alloy with the tensile strength of more than 700MPa and a preparation method thereof. The high-strength aluminum alloy comprises the following raw materials in percentage by weight: 0.10%-0.14% of Fe, 0.03%-0.04% of Mn, 0.02%-0.04% of Si, 0.01%-0.06% of Ti, 0.03%-0.09% of B, 2.2%-2.9% of Zn, 0.9%-1.0% of Mg, 1.1%-1.3% of Cu, 0.5%-1.0% of Ce, 0.1%-0.4% of Sc and the balance of Al.

Description

technical field [0001] The invention relates to an aluminum alloy, in particular to a high-strength aluminum alloy and a preparation method thereof. Background technique [0002] High-strength aluminum alloy has been used as the main structural material of aircraft due to its low density, high strength and other excellent properties. From the 7075 developed in the 1940s to the current 7055, the hardening alloy has higher and higher element content. However, with the increase of the content of alloying elements, due to the interaction between alloying elements and impurities (such as Fe, Si), the transformation of non-equilibrium phases, the formation of coarse particles and the precipitation of aging phases, the performance of aluminum alloys will be greatly changed. Change, the addition of impurity elements has a great influence on the properties of aluminum alloys, therefore, the content selection of impurity elements is very important. Various impurity elements added to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22F1/053C22C1/00
Inventor 黄长远付孙明
Owner FUJIAN MINFA ALUMINUM
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