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High-strength corrosion-resistant aluminum alloy section bar for doors and windows

A corrosion-resistant aluminum alloy and high-strength technology, applied in the field of aluminum alloys, can solve problems such as difficult to meet the service life requirements of building materials, shorten the service life of aluminum alloy profiles, and the strength of aluminum alloys is not very high, so as to reduce the coarse undissolved crystal phase , Improve corrosion performance, improve toughness and exfoliation corrosion resistance

Active Publication Date: 2016-03-16
ANHUI XIN FA ALUMINUM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The strength of the existing aluminum alloy is not very high, and the aluminum alloy doors and windows made of it are affected by wind pressure and impact during push and pull or opening and closing during use. At the same time, because the main material of aluminum alloy profiles is aluminum , aluminum alloy doors and windows will experience wind and sun or be affected by changes in temperature and humidity during use, and are easily oxidized and corroded in the air, resulting in discoloration and deformation of aluminum alloy profiles for doors and windows, shortening the use of aluminum alloy profiles life
Therefore, the surface treatment of aluminum alloy profiles is usually carried out. The existing surface treatment processes of aluminum alloy profiles include anodic oxidation, electrolytic coloring, electrophoretic painting, powder spraying, fluorocarbon paint spraying, wire drawing, etc. These surface treatment processes all play a role. Certain anti-corrosion effects, but with the improvement of people's performance requirements for aluminum alloy profiles, the existing aluminum alloy profiles are still difficult to meet the service life requirements of existing building materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A high-strength corrosion-resistant aluminum alloy profile for doors and windows proposed by the present invention, its composition includes: Mg: 1.2%; Cu: 1.5%; Mn: 0.3%; Zn: 8%; Sc: 0.02%; Ti: 0.1 %; Cr: 0.01%; Fe: 0.25%; Yb: 0.05%; the balance is Al;

[0024] According to the above composition ratio, the high-strength corrosion-resistant aluminum alloy profiles for doors and windows are prepared according to the following process:

[0025] S1. Melting each raw material according to the ratio to obtain an ingot;

[0026] S2. After preheating the extrusion die and the ingot, place it on the extruder for extrusion, wherein the preheating temperature of the extrusion die is 450°C, the preheating time is 3.5h, and the preheating temperature of the ingot is 470°C , the preheating time is 6 hours, and the extrusion speed is 5m / min; after the extrusion is completed, it is air-cooled or water-cooled to below 50°C, and then stretched and straightened to obtain an extruded par...

Embodiment 2

[0030] A high-strength corrosion-resistant aluminum alloy profile for doors and windows proposed by the present invention, its composition includes: Mg: 1.8%; Cu: 1%; Mn: 0.5%; Zn: 5%; Sc: 0.2%; Ti: 0.02 %; Cr: 0.1%; Fe: 0.05%; Yb: 0.3%; the balance is Al;

[0031] According to the above composition ratio, the high-strength corrosion-resistant aluminum alloy profiles for doors and windows are prepared according to the following process:

[0032] S1. Melting each raw material according to the ratio to obtain an ingot;

[0033] S2. After preheating the extrusion die and the ingot, place it on the extruder for extrusion, wherein the preheating temperature of the extrusion die is 470° C., the preheating time is 2 hours, and the preheating temperature of the ingot is 520° C. The preheating time is 4 hours, and the extrusion speed is 40m / min; after the extrusion is completed, air-cool or water-cool to below 50°C, and then stretch and straighten to obtain an extruded piece, wherein ...

Embodiment 3

[0037] A high-strength corrosion-resistant aluminum alloy profile for doors and windows proposed by the present invention, its composition includes: Mg: 1.6%; Cu: 1.2%; Mn: 0.38%; Zn: 7%; Sc: 0.1%; Ti: 0.07 %; Cr: 0.06%; Fe: 0.2%; Yb: 0.25%; the balance is Al;

[0038] According to the above composition ratio, the high-strength corrosion-resistant aluminum alloy profiles for doors and windows are prepared according to the following process:

[0039] S1. Melting each raw material according to the ratio to obtain an ingot;

[0040] S2. After preheating the extrusion die and ingot, place it on the extruder for extrusion, wherein the preheating temperature of the extrusion die is 458°C, the preheating time is 3.2h, and the preheating temperature of the ingot is 486°C , the preheating time is 4.8h, and the extrusion speed is 12m / min; after the extrusion is finished, it is air-cooled or water-cooled to below 50°C, and then stretched and straightened to obtain an extruded piece, whe...

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Abstract

The invention discloses a high-strength corrosion-resistant aluminum alloy section bar for doors and windows. The high-strength corrosion-resistant aluminum alloy section bar consists of the following components in percentage by weight: 1.2-1.8% of Mg, 1-1.5% of Cu, 0.3-0.5% of Mn, 5-8% of Zn, 0.02-0.2% of Sc, 0.02-0.1% of Ti, 0.01-0.1% of Cr, 0.05-0.25% of Fe and 0.05-0.3% of Yb. The high-strength corrosion-resistant aluminum alloy section bar is prepared by the following process: smelting raw materials and putting the smelted raw materials on an extruder to extrude at an extrusion speed of 5-40m / min; after extrusion is ended, cooling the raw materials to a temperature lower than 50 DEG C to carry out stretching and straightening, thereby obtaining an extruded part; putting the extruded part into a heat preserving furnace to carry out thermal treatment, carrying out degreasing, chromizing, washing and drying on the extruded part after a washing process, and then carrying out powder spraying on the extruded part to obtain the high-strength corrosion-resistant aluminum alloy section bar. The high-strength corrosion-resistant aluminum alloy section bar for doors and windows disclosed by the invention is high in strength, and is good in corrosion resistance; and doors and windows manufactured by the high-strength corrosion-resistant aluminum alloy section bar are not liable to deformation and color change, and are long in service lifetime.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a high-strength, corrosion-resistant aluminum alloy profile for doors and windows. Background technique [0002] The strength of the existing aluminum alloy is not very high, and the aluminum alloy doors and windows made of it are affected by wind pressure and impact during push and pull or opening and closing during use. At the same time, because the main material of aluminum alloy profiles is aluminum , aluminum alloy doors and windows will experience wind and sun or be affected by changes in temperature and humidity during use, and are easily oxidized and corroded in the air, resulting in discoloration and deformation of aluminum alloy profiles for doors and windows, shortening the use of aluminum alloy profiles life. Therefore, the surface treatment of aluminum alloy profiles is usually carried out. The existing surface treatment processes of aluminum alloy profiles ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22F1/053C23G1/24
CPCC22C21/10C22F1/053C23G1/24
Inventor 王超李杰孙金东
Owner ANHUI XIN FA ALUMINUM PROD
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