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A kind of al-cu-mg-fe-ni series deformation heat-resistant aluminum alloy and preparation method thereof

A technology of al-cu-mg-fe-ni and aluminum alloy, which is applied in the field of Al-Cu-Mg-Fe-Ni series heat-resistant aluminum alloy and its preparation, can solve the problem of difficult mass production and new heat resistance Heat-resistant aluminum alloy has complex preparation process and poor process plasticity, etc., to achieve the effect of strong implementability, good processing performance and improved heat resistance

Active Publication Date: 2018-08-03
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose an Al-Cu-Mg- The Fe-Ni series deformed heat-resistant aluminum alloy and its preparation method greatly improve the heat resistance of the alloy and at the same time have good process plasticity, which can realize batch preparation and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The alloy composition (mass percentage) is: Cu 5.0%, Mg 2.1%, Fe 1.6%, Ni 1.5%, Ag0.40%, Zr 0.15%, Sc 0.08%, Ti 0.06%, and the balance is Al.

[0039] First melt the Al-50% Fe, Al-50% Ni master alloy at 900°C, fully stir and cool down to 850°C, gas refining for 15 minutes, then remove the slag on the surface, let it stand for 20 minutes, then transfer it to the atomization furnace for atomization Powder making; sieve the powder to obtain a powder with a diameter of 20-150 μm.

[0040]Put the powder into a steel mold with a diameter of Φ200mm for cold pressing, the pressure is 100MPa, and the pressure is kept for 30min. After the pressed block is taken out, it is hot-pressed and sintered in a vacuum hot-pressing furnace. The heating temperature is 380°C and the pressure is 150MPa. , vacuum degree 3.5×10 -4 Pa, holding time 2h. The billet after hot pressing and sintering was extruded into Φ10mm wire at 400°C.

[0041] Add pure aluminum, pure magnesium, Al-Cu, Al-Zr, Al...

Embodiment 2

[0050] The alloy composition (mass percentage) is: Cu 5.5%, Mg 1.8%, Fe 2.0%, Ni 1.9%, Zr 0.15%, Sc 0.08%, Ti 0.06%, V 0.10%, and the balance is Al.

[0051] First melt the Al-50% Fe, Al-50% Ni master alloy at 900°C, fully stir and cool down to 820°C, gas refining for 15 minutes, then remove the slag on the surface, let it stand for 20 minutes, then transfer it to the atomization furnace for atomization Powder making; sieve the powder to obtain a powder with a diameter of 20-150 μm.

[0052] Put the powder into a steel mold with a diameter of Φ300mm for cold pressing, the pressure is 100MPa, and the pressure is maintained for 30 minutes. After the pressed block is taken out, it is hot-pressed and sintered in a vacuum hot-pressing furnace. The heating temperature is 400°C and the pressure is 100MPa. , vacuum degree 5.3×10 -4 Pa, holding time 3h. The billet after hot pressing and sintering was extruded into Φ10mm wire at 400°C.

[0053] Add pure aluminum, pure magnesium, Al-C...

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Abstract

The invention belongs to the field of aluminum alloy materials, and relates to an Al-Cu-Mg-Fe-Ni serial deformation heat-resistance aluminum alloy and a preparation method thereof. The aluminum alloy has the following components in percentage by mass: 4.7-5.8% of Cu, 1.5-2.4% of Mg, 1.5-2.0% of Fe, 1.4-1.9% of Ni, 0.04-0.20% of Zr, 0.03-0.10% of Ti, and one to three types of 0.04-0.10% of Sc, 0.08-0.15% of V and 0.3-0.9% of Ag, other impurity monomer not more than 0.05%, the total quantity not more than 0.15%, and the balance of Al. The invention further proposes the preparation method of the alloy; and intermetallic compounds rich in Fe and Ni are uniformly distributed in the alloy in a nanoparticle form. The deformation heat-resistance aluminum alloy is more excellent in heat resistance when achieving excellent hot working performance, forming performance and comprehensive mechanical performance. The method is simple and feasible, is not largely changed compared with a traditional preparation process, and in particular, is suitable for industrial batch production.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials, and relates to an Al-Cu-Mg-Fe-Ni series deformed heat-resistant aluminum alloy and a preparation method thereof. Background technique [0002] Deformed heat-resistant aluminum alloy has low density, high thermal conductivity, good forming characteristics and high economic benefits, and has been widely used in weapons, aviation, aerospace, automobile and other industries, such as missile shells, tail fins, aircraft skins, etc. . With the rapid development of aviation and aerospace, higher requirements have been placed on the heat resistance of deformed heat-resistant aluminum alloys. The long-term working temperature of traditional deformed heat-resistant aluminum alloys is generally below 150°C, which limits its application range. [0003] In order to increase the service temperature of heat-resistant aluminum alloys, researchers at home and abroad have prepared Al-Fe, Al-Cr series new he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/16C22C1/03C22F1/057
CPCC22C1/03C22C21/16C22F1/057
Inventor 伊琳娜李国爱何维维刘铭
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS