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Production technique of antifatigue aluminum alloy section

A technology for aluminum alloy profiles and production processes, applied in the field of aluminum alloy materials, can solve problems such as failure of parts and easy generation of cracks, and achieve the effects of improving high temperature performance, good high temperature corrosion resistance, and excellent fatigue resistance.

Inactive Publication Date: 2014-01-01
ANHUI HUANYU ALUMINUM
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Problems solved by technology

The fatigue performance of aluminum alloy directly determines the reliability of aluminum alloy profiles. Ordinary aluminum alloys are prone to cracks in high temperature and high strength environments, resulting in component failure.

Method used

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Embodiment Construction

[0015] A production process of fatigue-resistant aluminum alloy profiles, comprising the following steps:

[0016] (1) Put the charge into the melting furnace for heating and smelting. After the charge is melted, sprinkle 2 / 3 of the covering agent to cover it. 2 Cl 6 Refining, put it into the furnace and let it stand for 10 minutes. When it reaches 750°C, press the block modifier into the bottom of the center of the furnace for modification treatment. After the modification reaction for 2 minutes, sprinkle the remaining 1 / 3 of the covering agent, and let it stand for 15 minutes. It can be cast, and the mass percentage of each alloy element in the melt must be ensured before casting: Cu 3.5-4.2, Mg 1.2-1.8, Mn 0.4-0.8, Zn 0.10-0.15, Ti 0.1-0.2%, Sb 0.2-0.3 %, Zr 0.35-0.45%, Fe 0.08-0.12%, Si 0.04-0.06%, Ge 0.03-0.05%, Bi 0.02-0.03%, RE 0.04-0.08%, B 0.002-0.003%, and the balance is Al;

[0017] (2) Continuously cast the melt into ingots, and then perform homogeniza...

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Abstract

The invention discloses a production technique of an antifatigue aluminum alloy section. The alloy comprises the following elements in percentage by mass: 3.5-4.2% of Cu, 1.2-1.8% of Mg, 0.4-0.8% of Mn, 0.10-0.15% of Zn, 0.1-0.2% of,Sb0.2-0.3% of Ti, 0.35-0.45% of Zr, 0.08-0.12% of Fe, 0.04-0.06% of Si, 0.03-0.05% of Ge, 0.02-0.03% of Bi, 0.04-0.08% of RE, 0.002-0.003% of B and the balance of Al. The contents of Fe, Si and other impurity elements are lowered to improve the fracture toughness, fatigue resistance and stress corrosion resistance of the alloy; and the rare earth metal elements, including Pr, Nd and La, in the modifier can form high-thermohardening-property complex component compounds in the aluminum alloy which are reticularly distributed on the grain boundary or among the dendrite, thereby refining the structure, effectively preventing the base transformation and movement of crystal boundaries, and further obviously enhancing the high temperature properties of the alloy.

Description

technical field [0001] The invention relates to a production process of a fatigue-resistant aluminum alloy profile, belonging to the technical field of aluminum alloy materials. Background technique [0002] Aluminum alloys are widely used in the aerospace industry due to their low density, high specific strength, good damage resistance and good formability. The fatigue performance of aluminum alloy directly determines the reliability of aluminum alloy profiles. Ordinary aluminum alloys are prone to cracks in high-temperature and high-strength environments, resulting in component failure. Therefore, improving the fatigue resistance of aluminum alloy profiles is of great significance for prolonging the service life of parts and improving the stability of equipment. Contents of the invention [0003] The purpose of the present invention is to provide a production process of a fatigue-resistant aluminum alloy profile, which can make the material obtain more excellent fatig...

Claims

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Application Information

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IPC IPC(8): C22C21/18C22C1/02C22C1/06C22F1/057
Inventor 陈鹏王冲金继松
Owner ANHUI HUANYU ALUMINUM
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