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High-strength anti-corrosion aluminum alloy and preparation method thereof

A corrosion-resistant aluminum alloy, high-strength technology, applied in the field of high-strength corrosion-resistant aluminum alloy and its preparation, to achieve the effects of reducing potential difference, simple and easy preparation method, and improving strength and fracture toughness

Active Publication Date: 2017-12-12
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For high Mg aluminum alloys, deformation heat treatment can improve the corrosion resistance of the alloy, but the process needs to be controlled precisely and synergistically with the alloy composition

Method used

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  • High-strength anti-corrosion aluminum alloy and preparation method thereof
  • High-strength anti-corrosion aluminum alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Table 1 shows the composition and weight percentage of the aluminum alloy.

[0018] Table 1

[0019] Ingot No.

[0020] The preparation method of this alloy is:

[0021] (1) Proportioning raw materials: according to the components and weight percent proportioning raw materials shown in Table 1;

[0022] (2) Raw material smelting: under the temperature condition of 760°C, first melt the high-purity aluminum ingot, and then add Al-Er master alloy, Al-B master alloy, Al-Mn master alloy, Ce-rich rare earth element, Al - Zr master alloy, add pure zinc, pure magnesium and covering agent after the master alloy is melted;

[0023] (3) Refining: add hexachloroethane to the completely melted molten metal for degassing treatment, and fully stir. During refining, the metal temperature should be maintained within the range of 730°C. Not less than 25 minutes;

[0024] (4) Casting: When the temperature of the molten metal drops to 700°C, after it has been allowed to stan...

Embodiment 2

[0034] Table 3 is the composition and weight percentage of the aluminum alloy.

[0035] table 3

[0036]

[0037] The preparation method of this alloy is:

[0038] (1) Proportioning raw materials: according to the components and weight percent proportioning raw materials shown in Table 1;

[0039] (2) Raw material smelting: under the temperature condition of 750°C, first melt the high-purity aluminum ingot, and then add Al-Er master alloy, Al-B master alloy, Al-Mn master alloy, Ce-rich rare earth elements, Al - Zr master alloy, add pure zinc, pure magnesium and covering agent after the master alloy is melted;

[0040] (3) Refining: add hexachloroethane to the completely melted molten metal for degassing treatment, and fully stir. During refining, the metal temperature is maintained within the range of 720°C. After refining, it should be fully allowed to stand. Not less than 25 minutes;

[0041] (4) Casting: when the temperature of the molten metal drops to 690°C, after ...

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Abstract

The invention discloses high-strength anti-corrosion aluminum alloy and a preparation method thereof. The high-strength anti-corrosion aluminum alloy comprises, by weight, 4.5-5.5% of Mg, 0.9-1.8% of Zn, 0.4-1.0% of Mn, 0.01-0.05% of rare earth Ce, 0.15-0.35% of Er, 0.10-0.25% of Zr, 0.01-0.06% of B, 0-0.1% of impurity Si, 0-0.15% of Fe, 0-0.15% of other impurity elements, and the balanced element Al. the preparation process of the aluminum alloy comprises the steps of raw material proportioning, raw material smelting, refining, pouring, three-stage homogenizing treatment, compressional deformation treatment, tensile deformation treatment and aging treatment. The preparation process is simple and easy to implement and low in production cost. The aluminum alloy has high corrosion resistance and good mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metals, in particular to a high-strength corrosion-resistant aluminum alloy and a preparation method thereof. Background technique [0002] Al-Mg series aluminum alloys have excellent corrosion resistance and are widely used in hull structures, such as ship sides, bottom panels, keels, ribs, bulkheads, etc. The working environment of the ship requires corrosion-resistant aluminum alloys to have certain mechanical strength, corrosion resistance and weldability. However, it is usually difficult for Al-Mg aluminum alloys to have excellent corrosion resistance and strength at the same time. In order to improve the strength of Al-Mg aluminum alloys, the content of Mg element is usually increased, but the Mg 5 al 8 The continuous precipitation of the phase along the grain boundary reduces the corrosion resistance of the alloy and greatly reduces the processing performance. For high-Mg aluminum all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06C22C1/03C22C1/06C22F1/047
CPCC22C1/026C22C1/03C22C1/06C22C21/06C22F1/047
Inventor 聂宝华陈东初傅晓润罗铭强常萌蕾聂德建孙海波
Owner FOSHAN UNIVERSITY
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