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Wear-resistant alkaline-corrosion-resistant aluminum alloy

An aluminum alloy and corrosion-resistant technology, which is applied in the field of aluminum alloys, can solve the problems of poor corrosion resistance of aluminum-silicon alloys and achieve the effect of improving corrosion resistance

Inactive Publication Date: 2013-01-16
WUXI HONGCHANG HARDWARE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor corrosion resistance of existing aluminum-silicon alloys and provide an aluminum alloy with excellent corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A wear-resistant, alkali-resistant and corrosion-resistant aluminum alloy containing 12% silicon, 3% magnesium, 1.2% lithium, 0.3% titanium, 0.4% cobalt, 0.6% cerium, and 0.1% ytterbium by weight percentage, supplemented to 100% by aluminum , Silicon, magnesium, lithium, titanium, cobalt, cerium, ytterbium and aluminum are melted at 850°C according to the ratio, and cast into shapes. It should be noted that lithium should be added to the alloy water immediately before casting to avoid volatilization of lithium components.

Embodiment 2

[0014] A wear-resistant, alkali-resistant and corrosion-resistant aluminum alloy containing 12.5% ​​silicon, 3.7% magnesium, 1.4% lithium, 0.34% titanium, 0.5% cobalt, 0.69% cerium, and 0.13% ytterbium by weight percentage, supplemented to 100% by aluminum , melting silicon, magnesium, lithium, titanium, cobalt, cerium, ytterbium, and aluminum at 890°C according to the ratio, and casting them into shapes.

Embodiment 3

[0016] A wear-resistant, alkali-resistant and corrosion-resistant aluminum alloy containing 13% silicon, 4.3% magnesium, 2.7% lithium, 0.35% titanium, 0.6% cobalt, 0.76% cerium, and 0.2% ytterbium by weight percentage, supplemented to 100% by aluminum , melting silicon, magnesium, lithium, titanium, cobalt, cerium, ytterbium, and aluminum at 880°C according to the ratio, and casting them into shapes.

[0017] Corrosion resistance test: The alloy was immersed in 1% NaOH in the corrosion medium for 1 month. The comparison experiment used Si-Mg-Al alloy with the same silicon and magnesium content, and the results were as follows:

[0018] .

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Abstract

The invention discloses wear-resistant alkaline-corrosion-resistant aluminum alloy which comprises, by weight, 12-13% of silicon, 3-4.3% of magnesium, 1.2-2.7% of lithium, 0.3-0.35% of titanium, 0.4-0.6% of cobalt, 0.6-0.76% of cerium, 0.1-0.2% of ytterbium and the balance aluminum. The corrosion resistance, particularly the alkaline corrosion resistance of the aluminum alloy can be obviously improved, the corrosion rate is decreased from originally 0.027-0.03g / (m<2> h) to 0.01-0.012g / (m<2> h), and the hardness is increased from originally about 490 to about 540.

Description

technical field [0001] The invention belongs to the field of aluminum alloys, in particular to a wear-resistant and alkali-resistant aluminum alloy. Background technique [0002] Aluminum-silicon alloy is a common aluminum alloy. Changes in the ratio of aluminum to silicon can have a great impact on hardness. For example, when the silicon content is less than 7%, the aluminum-silicon alloy has good ductility, and the silicon content exceeds the aluminum-silicon eutectic. After the point, the silicon particles in the alloy increase significantly, and the wear resistance of the alloy also increases significantly. However, in actual use, due to the selective corrosion phenomenon of the Al-Si eutectic, the existing method is to perform electrochemical treatment on the Al-Si alloy to etch the surface layer. Aluminum is used to retain the silicon in the matrix to improve its corrosion resistance. However, this method has the problems of complicated operation and difficult control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02
Inventor 浦永建
Owner WUXI HONGCHANG HARDWARE MFG
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