High-strength rare earth reinforced aluminum alloy and preparation method thereof

Abstract

The invention discloses a high-strength rare earth reinforced aluminum alloy and a preparation method thereof. The high-strength rare earth reinforced aluminum alloy comprises an aluminum ingot, a copper ingot, a lead ingot, an aluminum-tin intermediate alloy, an aluminum-yttrium intermediate alloy, an aluminum-gadolinium intermediate alloy, an aluminum-lutetium intermediate alloy and an aluminum-titanium-boron intermediate alloy. The aluminum alloy comprises the following components in parts by weight: 12-18 parts of an aluminum ingot, 11-15 parts of a copper ingot, 8-12 parts of a lead ingot, 5-7 parts of an aluminum-tin intermediate alloy, 10-12 parts of an aluminum-yttrium intermediate alloy, 8-10 parts of an aluminum-gadolinium intermediate alloy, 7-9 parts of an aluminum-lutetium intermediate alloy and 2-6 parts of an aluminum-titanium-boron intermediate alloy. The corrosion resistance and oxidation resistance of the aluminum alloy are reinforced by adding high-strength rare earth elements, the corrosion risk of the aluminum alloy in a special environment is reduced, the metal luster is kept for a long time, the decoration effect is good, the tensile strength and toughness of the aluminum alloy are improved through grain refinement, the fracture problem in the using process is avoided, and the working reliability of the aluminum alloy is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to high-strength rare earth-reinforced aluminum alloys and a preparation method thereof. Background technique [0002] Aluminum alloy is an alloy based on aluminum element with a certain amount of other alloying elements added. specific characteristics. [0003] However, most of the existing aluminum alloys and their preparation methods have the following problems: First, only by adding conventional elements such as magnesium, copper, lead, and silicon for alloying, the corrosion resistance and oxidation resistance are poor, and they are subject to corrosion by special environments. Seriously, it is difficult to maintain its metallic luster for a long time, and the decorative effect is limited; second, the material has low tensile strength and poor toughness, and is prone to fracture problems during use, which inevitably affects the reliability of the aluminum alloy; third,...

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Problems solved by technology

[0003] However, most of the existing aluminum alloys and their preparation methods have the following problems: First, only by adding magnesium, copper, lead, silicon and other conventional elements for alloying, the corrosion resistance and oxidation resistance are poor, and they are subject to corrosion by special environments. Seriously, it is difficult to maintain its metallic luster for a long time, and the decorative effect is limited; second, the material has low tensile strength and poor toughness, and is prone to fracture problems during use, which inevitably affects the reliability of the aluminum alloy; third, the preparation process Insufficient impurity removal in the medium, excess gas remains in the material, resulting in certain voids, destroying the structural compactness of the aluminum alloy, and affecting the overall performance of the aluminum alloy