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High-strength aluminum-copper alloy for aerospace structural parts and preparation method

An aluminum-copper alloy, aerospace technology, applied in the field of aluminum alloys, can solve the problems that the control of strength, toughness and cost is difficult to be effectively matched, cannot meet the performance requirements of aerospace structural parts, and is unfavorable for large-scale production and promotion. Effects of improving mechanical properties, refining grain size, and increasing number density

Active Publication Date: 2022-04-08
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem solved by the present invention is that the aluminum alloy materials in the prior art need to have high toughness and strength at room temperature and high temperature, and the cost of alloying and heat treatment is relatively high, which is not conducive to large-scale industrial production and promotion. The resulting toughness and cost control are difficult to effectively match, and cannot meet the performance requirements of aerospace structural parts

Method used

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  • High-strength aluminum-copper alloy for aerospace structural parts and preparation method
  • High-strength aluminum-copper alloy for aerospace structural parts and preparation method
  • High-strength aluminum-copper alloy for aerospace structural parts and preparation method

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Effect test

Embodiment 1

[0046] A high-strength aluminum-copper alloy, the chemical composition of which is calculated by mass percentage: Cu: 5.28wt.%, Mn: 0.55wt.%, Ti: 0.16wt.%, Mg: 0.20wt.%, Si: 0.20wt.%. , Fe: 0.18wt.%, Sn: 0.15wt.%, and the balance is Al.

[0047] The preparation method of the high-strength cast aluminum-copper alloy, the preparation method comprises the following steps:

[0048]S1, batching and preheating: according to the composition of the high-strength aluminum-silicon alloy, carry out raw material proportioning and weighing, the raw materials are pure aluminum, pure Sn, pure Ag and other components are Al-50% Cu, Al-20% Mn, Al-20Mg, Al-5Ti-B intermediate aluminum alloys; preheat the weighed raw materials, the preheating temperature is 200°C, and the preheating time is 35min;

[0049] S2. Melting: add the preheated raw materials in step S1 into a resistance furnace and heat until melting at a temperature of 760°C to obtain a melt;

[0050] S3. Treatment of molten aluminum:...

Embodiment 2

[0058] A high-strength aluminum-copper alloy, the chemical composition of which is calculated by mass percentage: Cu: 4.71wt.%, Mn: 0.32wt.%, Ti: 0.29wt.%, Mg: 0.25wt.%, Si: 0.04wt.%. , Fe: 0.04wt.%, Ag: 0.60wt.%, and the balance is Al.

[0059] The preparation method of the high-strength cast aluminum-copper alloy, the preparation method comprises the following steps:

[0060] S1, batching and preheating: according to the composition of the high-strength aluminum-silicon alloy, carry out raw material proportioning and weighing, the raw materials are pure aluminum, pure Sn, pure Ag and other components are Al-50% Cu, Al-20% Mn, Al-20Mg, Al-5Ti-B intermediate aluminum alloys; preheat the weighed raw materials, the preheating temperature is 180°C, and the preheating time is 40min;

[0061] S2. Melting: add the preheated raw materials in step S1 into a resistance furnace and heat until melting at a temperature of 750°C to obtain a melt;

[0062] S3, treatment of molten aluminum...

Embodiment 3

[0070] A high-strength aluminum-copper alloy, the chemical composition of which is calculated by mass percentage: Cu: 4.8wt.%, Mn: 0.43wt.%, Ti: 0.12wt.%, Mg: 0.20wt.%, Si: 0.22wt.%. , Fe: 0.17wt.%, Ag: 0.20wt.%, and the balance is Al.

[0071] The preparation method of the high-strength cast aluminum-copper alloy, the preparation method comprises the following steps:

[0072] S1. Batching and preheating: Proportion weighing of raw materials according to the composition of the high-strength aluminum-silicon alloy. The raw materials are pure aluminum, pure Ag and other components are Al-50% Cu, Al-20% Mn, Al-20Mg , Al-5Ti-B intermediate aluminum alloy; carry out preheating treatment on the weighed raw materials, the preheating temperature is 200 ℃, and the preheating time is 33min;

[0073] S2. Melting: add the preheated raw materials in step S1 into a resistance furnace and heat until melting at a temperature of 740°C to obtain a melt;

[0074] S3. Treatment of molten alumin...

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Abstract

The invention discloses a high-strength aluminum-copper alloy for aerospace structural parts and a preparation method, and belongs to the technical field of aluminum alloys. The aluminum alloy comprises the following components in percentage by weight: 4.5-5.5% of Cu, 0.25-0.60% of Mn, 0.12-0.30% of Ti, 1t of Mg, 0.12-0.30% of Mn and the balance of Al. %, 0.30 wt.%, Si: lt; %, 0.25 wt.%, Fe: lt; %, 0.20 wt.%, 0.20 to 0.60 wt.% of Ag or 0.15 to 0.30 wt.% of Sn, with the balance being Al. The preparation method comprises the steps of burdening, preheating, smelting, molten aluminum treatment, intermediate alloy adding, casting, solid solution quenching and aging treatment. The high-strength aluminum-copper alloy for the aerospace structural component is excellent in obdurability matching effect, and the organization structure of a high-strength aluminum-copper alloy casting obtained after heat treatment is also superior to that of an existing aerospace structural component.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and relates to a high-strength aluminum-copper alloy used for aerospace structural parts and a preparation method. Background technique [0002] As a lightweight structural material, aluminum alloy is considered to be the most attractive and valuable structural material in many industrial fields due to its high specific strength, good corrosion resistance and high thermal conductivity. one. Among them, cast aluminum alloys, especially Al-Cu alloys, have high toughness and strength at room temperature and high temperature, and are widely used in the aerospace field. [0003] However, with the increasing demand for lightweight and high-performance materials and the rapid development of new materials, the aluminum alloy industry urgently needs the birth of a new type of cast aluminum alloy that is lighter in weight and higher in strength and toughness. [0004] It is well known that approp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/14C22C21/16C22C1/03C22C1/06C22F1/057
Inventor 王俊升王兵张明山杨兴海李全刘鑫秀
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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