Titanium alloyed aluminium copper magnesium silver series high strength heat resistant aluminium alloy

Inactive Publication Date: 2004-12-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the analysis of the results of patents and journal reports, it is found that the high temperature heat resistance of Al-Cu-Mg-Ag alloys exceeds that of 2618 and 2219 aluminum alloys, but the increase in the tensile strength at room temperature is not obvious, and the high temperature strength, especially The high temperature strength above 250°C is far from meeting the requirements of practical applications.
At present, there is no literature report on the use of titanium alloying technology to promote the microstructure transformation and improve the heat resistance of Al-Cu-Mg-Ag alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 0.05% Ti to the aluminum-copper-magnesium-silver alloy ingredients. The alloy is smelted by vacuum metallurgy and poured into a round billet under the protection of argon. After solution quenching at 510°C, aging treatment is performed at 200°C. The composition and weight percentage of the alloy are 5.15% Cu-0.70% Mg-0.58% Ag-0.51% Mn-0.12% Zr-0.05% Ti, and the rest is Al.

Embodiment 2

[0017] Add 0.20% Ti to the aluminum-copper-magnesium-silver alloy ingredients. The alloy is smelted by vacuum metallurgy and poured into a round billet under the protection of argon gas. After solution quenching at 525°C, aging treatment is performed at 185°C. The composition and weight percentage of the alloy are: 6.50% Cu-0.81% Mg-0.72% Ag-0.40% Mn-0.15% Zr-0.20% Ti, and the rest is Al.

Embodiment 3

[0019] Add 0.31% Ti to the aluminum-copper-magnesium-silver alloy ingredients. The alloy is smelted by vacuum metallurgy and poured into a round billet under the protection of argon. After solution quenching at 520°C, aging treatment is performed at 210°C. The composition and weight percentage of the alloy are: 5.70% Cu-0.72% Mg-0.55% Ag-0.50% Mn-0.25% Zr-0.31% Ti, and the rest is Al.

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Abstract

An AlCuMgAg-series high-strength refractory Al alloy with alloyed Ti contains Cu (4-8 wt.%), Mg (0.4-1.0), Ag (0.3-1.0), Mn (0.3-0.6), Zr (0.05-0.30), Ti (0.05-1.1) and Al (rest). It features that the Ti is contained for finding the original cast-state structure of alloy, so optimizing its performance.

Description

technical field [0001] The invention relates to an aluminum-copper-magnesium-silver-based high-strength heat-resistant aluminum alloy, in particular to an aluminum-copper-magnesium-silver-based high-strength heat-resistant aluminum alloy alloyed with titanium elements. It belongs to the field of high-performance structural materials. Background technique [0002] Aluminum-copper-magnesium heat-resistant aluminum alloys are typical age-hardening aluminum alloys. Due to their good heat resistance and high specific strength, they are mainly used as aerospace structural materials. At present, the heat-resistant aluminum alloys widely used in industry are 2618 and 2219 aluminum alloys containing Cu and Mg. The typical composition and weight percentage of 2618 aluminum alloy are: 2.3% Cu-1.6% Mg-1.1% Fe-1.0% Ni-0.18% Si, the rest is Al, and its room temperature tensile strength σ b 441MPa, σ at 200°C b 321MPa, σ at 300°C b is 60MPa. Another typical heat-resistant aluminum all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/12
Inventor 王健农肖代红丁冬雁
Owner SHANGHAI JIAO TONG UNIV
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