Al-Zn-Mg-Cu-Zr-Er alloy

A technology of alloys and rare earths, which is applied in the field of alloys, can solve problems such as the influence of alloy properties that have not been reported in any reports, and achieve the effect of increasing strength

Inactive Publication Date: 2009-04-22
苏州有色金属研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the effect of Er on the properties of 7050 and 7150 (5.7-6.9% Zn-1.9-2.7% Mg-1.9-2.6% Cu-0.08-0.15% Zr) alloys

Method used

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  • Al-Zn-Mg-Cu-Zr-Er alloy
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Firstly, pure Zn, pure Mg, Al-50Cu master alloy, Al-10Zr master alloy and high-purity aluminum ingot (purity up to 99.99%) are used as raw materials;

[0027] Use commercially available refining agents and slag removers for degassing and slag removal, and melt aluminum with a composition of 5.7-6.9% Zn-1.9-2.7% Mg-1.9-2.6% Cu-0.08-0.15% Zr in a crucible resistance furnace Alloy ingots, after ingot sampling, after uniform annealing at 470°C / 24h, cut the head and tail and mill the surface, heat through (380°C-430°C / 2-3h) and then hot-roll, the final thickness of the hot-rolled plate is 4mm, The total deformation is up to 90%. After the hot-rolled plate is solution treated at 470°C / 1h, it is subjected to aging heat treatment at 100°C to 150°C for different times, and various properties are measured.

Embodiment 2

[0029] Using pure Zn, pure Mg, Al-50Cu master alloy, Al-10Zr master alloy, Al-10Er master alloy and high-purity aluminum ingot (purity up to 99.99%) as raw materials;

[0030] Use commercially available refining agents and slag removers for degassing and slag removal, and melt in a crucible resistance furnace with a composition of 5.7-6.9% Zn-1.9-2.7% Mg-1.9-2.6% Cu-0.08-0.15% Zr-0.1 %Er aluminum alloy ingot, after ingot sampling, after uniform annealing at 470°C / 24h, cut head and tail and face milling, heat through (380°C-430°C / 2-3h) and then hot-roll, and finally hot-rolled plate The thickness is 4mm, and the total deformation reaches 90%. After the hot-rolled plate is solution treated at 470°C / 1h, it is subjected to aging heat treatment at 100°C to 150°C for different times, and various properties are measured.

Embodiment 3

[0032] Using pure Zn, pure Mg, Al-50Cu master alloy, Al-10Zr master alloy, Al-10Er master alloy and high-purity aluminum ingot (purity up to 99.99%) as raw materials;

[0033] Use commercially available refining agents and slag removers for degassing and slag removal, and melt in a crucible resistance furnace with a composition of 5.7-6.9% Zn-1.9-2.7% Mg-1.9-2.6% Cu-0.08-0.15% Zr-0.3 %Er aluminum alloy ingot, after ingot sampling, after uniform annealing at 470°C / 24h, cut head and tail and face milling, heat through (380°C-430°C / 2-3h) and then hot-roll, and finally hot-rolled plate The thickness is 4mm, and the total deformation reaches 90%. After the hot-rolled plate is solution treated at 470°C / 1h, it is subjected to aging heat treatment at 100°C to 150°C for different times, and various properties are measured.

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Abstract

The invention provides a Al-Zn-Mg-Cu-Zr-Er alloy, which comprises the following compositions in weight percentage: 5.7 to 6.9 weight percent of Zn, 1.9 to 2.7 weight percent of Mg, 1.9 to 2.6 weight percent of Cu, 0.08 to 0.15 weight percent of Zr, 0.1 to 0.6 weight percent of rare earth Er, and the balance being Al and unavoidable impurities. Addition of Er can effectively inhibit growth of recrystallized grains, and fine tissue after an alloy plate is subject to solution hardening, so that the phenomenon of recrystallized growth of the Al-Zn-Mg-Cu-Zr alloy can be effectively inhibited after the Al-Zn-Mg-Cu-Zr alloy is deformed after hot processing or solution hardening; when the content of the Er is between 0.1 and 0.3 weight percent, the strength of the alloy can be significantly improved, and the specific elongation of the alloy is basically unvaried.

Description

technical field [0001] The invention relates to an aluminum alloy, in particular to a novel high-strength Al-Zn-Mg-Cu-Zr-Er alloy through microalloying, and belongs to the field of alloy technology. Background technique [0002] High-strength aluminum alloys represented by 7XXX are widely used in aviation and aerospace fields, among which microalloying is one of the basic means to improve the performance of aluminum alloys and develop new aluminum alloys. Er can form Al in Al-Mg and Al-Zn-Mg alloys 3 Er phase, Al 3 Er phase properties and Al 3 Sc, Al 3 Zr is similar, both coherent or semi-coherent with the matrix. The influence of Er element on alloy properties is similar to that of elements Zr and Sc on alloy properties, and its strengthening mechanism mainly includes fine grain strengthening, precipitation strengthening and substructure strengthening. Therefore, in the research of rare earth aluminum alloys, the cost of Er is lower than that of Sc, and it is an effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10
Inventor 邓桢桢吴文祥韩逸徐义
Owner 苏州有色金属研究院有限公司
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