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Aluminum alloy for high-strength corrosion-resistant doors and windows and preparation method thereof

A corrosion-resistant and aluminum alloy technology, which is applied in the field of high-strength corrosion-resistant aluminum alloys for doors and windows and its preparation, can solve the problems of high thermal cracking tendency, poor corrosion resistance, and poor high-temperature strength of aluminum alloys, and reduce the tendency of thermal cracking , Improve toughness and corrosion resistance, improve casting performance

Inactive Publication Date: 2019-01-08
阜阳力佳门业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problems of the prior art, to provide a high-strength corrosion-resistant aluminum alloy for doors and windows and its preparation method. By optimizing the alloy composition, proportion and processing technology, the gap between the strength and casting performance of the aluminum alloy can be effectively solved. The contradictory problems among them make the prepared aluminum alloy have good casting performance while satisfying the strength and toughness, which solves the problems of high thermal cracking tendency, poor corrosion resistance and poor high temperature strength of aluminum alloy

Method used

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  • Aluminum alloy for high-strength corrosion-resistant doors and windows and preparation method thereof
  • Aluminum alloy for high-strength corrosion-resistant doors and windows and preparation method thereof
  • Aluminum alloy for high-strength corrosion-resistant doors and windows and preparation method thereof

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Embodiment 1

[0041] The high-strength, corrosion-resistant aluminum alloy for doors and windows of this embodiment includes, in parts by mass, Zn: 6.50%, Cu: 2.50%, Mg: 2.10%, Mn: 0.40%, Si: 0.34%, and Cr: 0.19%. , Ti: 0.11%, Mo: 0.02%, B: 0.22%, rare earth element RE: 0.05%, the single content of other impurity elements is not more than 0.05%, the sum is not more than 0.10%, and the rest is Al;

[0042] According to the above composition ratio, the high-strength corrosion-resistant aluminum alloy for doors and windows comprises the following steps:

[0043] (1) Melting: put the aluminum ingot into the furnace, and vacuumize the furnace to 1×10 -3 Pa, and then pass argon into the furnace to make the pressure in the furnace reach 30Pa, and heat the furnace temperature to 710°C to melt the aluminum ingot;

[0044] (2) Slag removal: use a slag remover at a temperature of 700°C to remove slag and impurities in the aluminum solution, and clean the scum and surface oxides on the surface of the ...

Embodiment 2

[0066] The high-strength, corrosion-resistant aluminum alloy for doors and windows of this embodiment includes, in parts by mass, Zn: 10.50%, Cu: 3.50%, Mg: 2.50%, Mn: 0.60%, Si: 0.38%, and Cr: 0.25%. , Ti: 0.15%, Mo: 0.05%, B: 0.26%, rare earth element RE: 0.09%, the single content of other impurity elements is not more than 0.05%, the sum is not more than 0.10%, and the rest is Al;

[0067] According to the above composition ratio, the high-strength corrosion-resistant aluminum alloy for doors and windows comprises the following steps:

[0068] (1) Melting: put the aluminum ingot into the furnace, and vacuumize the furnace to 1×10 -3 Pa, then pass argon into the furnace to make the pressure in the furnace reach 40Pa, and heat the furnace temperature to 730°C to melt the aluminum ingot;

[0069] (2) Slag removal: use a slag remover at a temperature of 720°C to remove slag and impurities in the aluminum solution, and clean the scum and surface oxides on the surface of the alu...

Embodiment 3

[0091] The high-strength, corrosion-resistant aluminum alloy for doors and windows of this embodiment includes, in parts by mass, Zn: 8.50%, Cu: 3.00%, Mg: 2.30%, Mn: 0.50%, Si: 0.36%, and Cr: 0.22%. , Ti: 0.13%, Mo: 0.03%, B: 0.24%, rare earth elements RE: 0.07%, the single content of other impurity elements is not more than 0.05%, the sum is not more than 0.10%, and the rest is Al;

[0092] According to the above composition ratio, the high-strength corrosion-resistant aluminum alloy for doors and windows comprises the following steps:

[0093] (1) Melting: put the aluminum ingot into the furnace, and vacuumize the furnace to 1×10 -3 Pa, and then pass argon gas into the furnace to make the pressure in the furnace reach 35Pa, and heat the furnace temperature to 720°C to melt the aluminum ingot;

[0094] (2) Slag removal: use a slag remover at a temperature of 710°C to remove slag and impurities in the aluminum solution, and clean the scum and surface oxides on the surface of...

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Abstract

The invention discloses an aluminum alloy for high-strength corrosion-resistant doors and windows, which comprises 6.50-10.50% of Zn, 2.50-3.50% of Cu, 2.10-2.50% of Mg, 0.40-0.60% of Mn, 0.34-0.38% of Si, 0.19-0.25% of Cr, 0.11-0.15% of Ti, 0.02-0.05% of Mo, 0.22-0.26% of B, 0.05-0.09% of rare-earth element Re, and the balance of Al. The aluminum alloy is prepared by the steps of melting, slag-off, heat preservation, standing, on-line refining, proportioning, refining, on-line degassing, casting, uniform annealing, extrusion molding, heat treatment, coloring and pore sealing. By optimizing the composition, proportion and processing technology of the alloy, the contradiction between the strength and the casting performance of the aluminum alloy can be effectively solved, and the problems of large thermal cracking tendency, poor corrosion resistance and poor high temperature strength of the aluminum alloy are solved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to an aluminum alloy for high-strength corrosion-resistant doors and windows and a preparation method thereof. Background technique [0002] Aluminum alloy has good processing performance, especially hypoeutectic aluminum-silicon alloy, which not only has good processing performance, but also has light specific gravity, beautiful surface and corrosion resistance, good casting performance, good comprehensive mechanical properties of finished products, and the strength can be greatly improved after heat treatment. An excellent casting alloy, it can be used for a variety of parts with complex shapes and is widely used in many fields. [0003] The use of aluminum alloy in the production and application of doors and windows has a broad market. At present, more door and window materials on the market are mainly aluminum alloy, color steel, and PVC materials, and aluminum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10B22D18/06C22C1/02C22F1/053C25D11/14
CPCC22C21/10B22D18/06C22C1/026C22F1/053C25D11/14
Inventor 李均
Owner 阜阳力佳门业有限公司
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