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High-weather-fastness aluminum alloy and preparing method thereof

A high weather resistance, aluminum alloy technology, applied in the direction of metal material coating process, can solve problems such as poor weather resistance, and achieve the effects of low reaction temperature, tight bonding, and improved strength

Active Publication Date: 2018-02-27
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high weather resistance aluminum alloy and its preparation method to solve the problem of poor weather resistance of existing aluminum alloys

Method used

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  • High-weather-fastness aluminum alloy and preparing method thereof

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Effect test

Embodiment 1

[0021] The preparation method of the high weather resistance aluminum alloy of this embodiment includes:

[0022] (1) Put the aluminum alloy powder in a melting furnace, raise the temperature to 1000°C to melt it, keep it warm for 20 minutes, then add rare earth powder accounting for 0.65% by weight of the aluminum alloy powder, and continue to heat up to 1400°C, at 800r / min Stir for 30 minutes and hold for 45 minutes, lower the temperature of the furnace to 745°C and then cast to obtain an aluminum alloy ingot, wherein the rare earth powder is Y with a weight ratio of 3:4:7. 2 o 3 , La 2 o 3 and CeO 2 The composition of the mixture; the aluminum alloy ingot is subjected to double-stage homogenization treatment at 400°C / 12h+460°C / 12h, and the aluminum alloy ingot is subjected to multiple rolling treatments, and then solution treated at 465°C for 60min , and then quenched, placing the quenched aluminum alloy ingot in a drying oven for aging treatment at 120°C for 24 hours t...

Embodiment 2

[0027] The preparation method of the high weather resistance aluminum alloy of this embodiment includes:

[0028] (1) Put the aluminum alloy powder in a melting furnace, heat it up to 1200°C to melt it, keep it warm for 150 minutes, then add rare earth powder accounting for 0.8% by weight of the aluminum alloy powder, continue to heat up to 1500°C, and heat it at 1000r / min Stir for 20 minutes and hold for 30 minutes, lower the temperature of the furnace to 750°C and then cast to obtain an aluminum alloy ingot, wherein the rare earth powder is Y with a weight ratio of 3:4:7. 2 o 3 , La 2 o 3 and CeO 2 The composition of the mixture; the aluminum alloy ingot is subjected to double-stage homogenization treatment at 400°C / 12h+460°C / 12h, and the aluminum alloy ingot is subjected to multiple rolling treatments, and then solution treated at 465°C for 60min , and then quenched, placing the quenched aluminum alloy ingot in a drying oven for aging treatment at 120°C for 24 hours to ...

Embodiment 3

[0033] The preparation method of the high weather resistance aluminum alloy of this embodiment includes:

[0034] (1) Put the aluminum alloy powder in a melting furnace, raise the temperature to 1100°C to melt it, keep it warm for 18 minutes, then add rare earth powder accounting for 0.7% by weight of the aluminum alloy powder, and continue to heat up to 1450°C, at 900r / min Stir for 25 minutes and hold for 40 minutes, lower the temperature of the furnace to 748°C and then cast to obtain an aluminum alloy ingot, wherein the rare earth powder is Y with a weight ratio of 3:4:7. 2 o 3 , La 2 o 3 and CeO 2 The composition of the mixture; the aluminum alloy ingot is subjected to double-stage homogenization treatment at 400°C / 12h+460°C / 12h, and the aluminum alloy ingot is subjected to multiple rolling treatments, and then solution treated at 465°C for 60min , and then quenched, placing the quenched aluminum alloy ingot in a drying oven for aging treatment at 120°C for 24 hours to...

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Abstract

The invention discloses a high-weather-fastness aluminum alloy and a preparing method thereof, and belongs to the technical field of high-performance aluminum alloy materials. According to the high-weather-fastness aluminum alloy and the preparing method, rare-earth powder formed by Y2O3, La2O3 and CeO2 is added into the aluminum alloy, and a heat treatment process under the specific condition isused in cooperation, so that the decay resistance of the aluminum alloy is improved obviously; meanwhile, after activating treatment is carried out, the surface of the aluminum alloy is coated with acoating containing rare-earth salt, and therefore the coating tightly combined with the surface of the aluminum alloy in a mutual embedded manner rather than only coated on the surface of the aluminumalloy; and in addition, as the coating contains rare earth elements, the weather fastness of the aluminum alloy is further improved.

Description

technical field [0001] The invention relates to the technical field of high-performance aluminum alloy materials, in particular to a high weather resistance aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloys are widely used in light industry, building materials, aerospace and other fields due to their advantages such as low density, high specific strength, excellent electrical and thermal conductivity, good plasticity, and good machining performance. Especially because of its light weight, it is more widely used in the field of aerospace. However, due to the unpredictable high-altitude flight environment, air humidity, temperature, and corrosive substances have great damage to aluminum alloys. Therefore, how to improve the weather resistance of aluminum alloys has become a technical problem at present. Contents of the invention [0003] The object of the present invention is to provide an aluminum alloy with high weather resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/02C22C1/06C22F1/053C23C22/56C23C22/78
CPCC22C1/026C22C1/06C22C21/10C22F1/053C23C22/56C23C22/78
Inventor 陈宝书栾道成冯再陈伟廖力
Owner XIHUA UNIV
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