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An aluminum alloy and alkali-resistant technology, 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
Active Publication Date: 2013-09-11
GUANGZHOU GOLDEN ALUMINUM ALUMINUM
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[0003] The purpose of the present invention is to solve the problem of poor corrosion resistance of existing aluminum-silicon alloys, and to provide an aluminum alloy with excellent corrosion resistance and wear resistance
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Embodiment 1
[0012] Add 12% silicon, 6% magnesium, 0.2% chromium, 0.3% titanium, 0.04% manganese, 0.1% tungsten, 0.16% ytterbium, 0.02% nickel, 0.6% zinc, and the balance aluminum into the melting furnace by weight , melted at 1050°C, and cast to obtain a wear-resistant, alkali-resistant and corrosion-resistant aluminum alloy.
Embodiment 2
[0014] Add 13% silicon, 5% magnesium, 0.14% chromium, 0.2% titanium, 0.05% manganese, 0.13% tungsten, 0.1% ytterbium, 0.03% nickel, 0.7% zinc, and the balance aluminum into the melting furnace by weight. , melted at 1000°C, and cast to obtain a wear-resistant, alkali-resistant and corrosion-resistant aluminum alloy.
Embodiment 3
[0016] Add 11% silicon, 4% magnesium, 0.1% chromium, 0.4% titanium, 0.08% manganese, 0.15% tungsten, 0.18% ytterbium, 0.026% nickel, 0.5% zinc, and the balance aluminum into the melting furnace by weight. , melted at 1100°C, and cast to obtain a wear-resistant, alkali-resistant and corrosion-resistant aluminum alloy.
[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: .
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Abstract
The invention discloses a wear-resistant alkali corrosion-resistant aluminum alloy which consists of the following components in percentage by weight: 11-13% of silicon, 4-6% of magnesium, 0.1-0.2% of chromium, 0.2-0.4% of titanium, 0.04-0.08% of manganese, 0.1-0.15% of tungsten, 0.1-0.18% of ytterbium, 0.02-0.03% of nickel, 0.5-0.7% of zinc and the balance of aluminum. By adopting the composition, the corrosion resistance and alkali corrosion resistance of a silicon-aluminum alloy can be obviously improved, the corrosion rate is reduced to 0.001-0.0025g/(m<2>.h) from 0.027-0.03g/(m<2>.h) before, and the hardness is improved to about 590 from about 490 before.
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 ...
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