Anodizable cast aluminum alloy and preparation method thereof

A casting aluminum alloy and anodic oxidation technology, which is applied in the field of aluminum alloy manufacturing, can solve the problems of unsatisfactory comprehensive performance of aluminum alloy casting fluidity and mechanical properties, so as to improve anodic oxidation performance, increase thickness, and improve casting fluidity and mechanical properties. performance effect

Active Publication Date: 2017-11-14
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Through the analysis of the above documents, it can be found that the comprehensive properties of the existing aluminum alloys in terms of anodic oxidation, casting fluidity and mechanical properties are still not ideal.

Method used

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  • Anodizable cast aluminum alloy and preparation method thereof
  • Anodizable cast aluminum alloy and preparation method thereof
  • Anodizable cast aluminum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The anodizable castable aluminum alloy of the present invention contains 3.5% Mg, 2.5% Si, 0.05% Ti, 0.05% Eu, 0.1% Re, and the rest is Al and unavoidable impurities, wherein the composition and mass percentage of Re For: Tb 28%, Dy 22%, Ho 17%, Tm 13%, Yb 12%, Lu 8%. Its preparation method is as follows:

[0029] Step 1: Select Al-10Ti alloy, Al-10Eu alloy, aluminum ingot with a purity of 99.7%, magnesium ingot with 99.9%, instant silicon with 99.9% and mixed heavy rare earth Re with 99.9% as raw materials. The ingredients list is as follows:

[0030]

[0031] Step 2: Heat and melt the aluminum ingot in a crucible resistance furnace and raise the temperature to 730°C, add magnesium ingot and instant silicon, stir and melt to form aluminum alloy liquid;

[0032] Step 3: After refining and deslagging the aluminum alloy liquid with hexachloroethane, add Al-10Ti alloy, Al-10Eu alloy and mixed heavy rare earth Re, and stir to make the composition of the aluminum alloy l...

Embodiment 2

[0037] The anodizable castable aluminum alloy of the present invention contains Mg 4.0%, Si 3.0%, Ti 0.1%, Eu 0.1%, Re 0.2%, and the rest is Al and unavoidable impurities, wherein the composition and mass percentage of Re are : Tb 28%, Dy 22%, Ho 17%, Tm 13%, Yb 12%, Lu 8%. Its preparation method is as follows:

[0038] Step 1: Select Al-10Ti alloy, Al-10Eu alloy, aluminum ingot with a purity of 99.7%, magnesium ingot with 99.9%, instant silicon with 99.9% and mixed heavy rare earth Re with 99.9% as raw materials. The ingredients list is as follows:

[0039]

[0040] Step 2: Heat and melt the aluminum ingot in a crucible resistance furnace and raise the temperature to 740°C, add magnesium ingot and instant silicon, stir and melt to form aluminum alloy liquid;

[0041] Step 3: After refining and deslagging the aluminum alloy liquid with hexachloroethane, add Al-10Ti alloy, Al-10Eu alloy and mixed heavy rare earth Re, and stir to make the composition of the aluminum alloy li...

Embodiment 3

[0046] The anodizable castable aluminum alloy of the present invention contains 4.5% of Mg, 3.5% of Si, 0.15% of Ti, 0.15% of Eu, 0.3% of Re, and the rest is Al and unavoidable impurities, wherein the composition and mass percentage of Re For: Tb 28%, Dy 22%, Ho 17%, Tm 13%, Yb 12%, Lu 8%. Its preparation method is as follows:

[0047] Step 1: Select Al-10Ti alloy, Al-10Eu alloy, aluminum ingot with a purity of 99.7%, magnesium ingot with 99.9%, instant silicon with 99.9% and mixed heavy rare earth Re with 99.9% as raw materials. The ingredients list is as follows:

[0048]

[0049] Step 2: Heat and melt the aluminum ingot in a crucible resistance furnace and raise the temperature to 750°C, add magnesium ingot and instant silicon, stir and melt to form aluminum alloy liquid;

[0050] Step 3: After refining and deslagging the aluminum alloy liquid with hexachloroethane, add Al-10Ti alloy, Al-10Eu alloy and mixed heavy rare earth Re, and stir to make the composition of the a...

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Abstract

The invention provides a cast aluminum alloy capable of being subjected to anodic oxidation and a preparation method thereof. The cast aluminum alloy is prepared from, by mass, 3.5%-4.5% of Mg, 2.5%-3.5% of Si, 0.05%-0.15% of Ti, 0.05%-0.15% of Eu, 0.1%-0.3% of Re and the balance Al and inevitable impurities. The preparation method includes the steps that an aluminum ingot is heated and melted, a magnesium ingot and fast dissolving silicon are added, and the mixture is stirred and melted into a molten aluminum alloy; after the molten aluminum alloy is subjected to refining and slag removing, an aluminum-titanium alloy, an aluminum-europium alloy and mixed heavy rare earth are added, and the mixture is stirred so that components of the molten aluminum alloy can be even; the molten aluminum alloy is cooled to 700 DEG C to 720 DEG C, stands for 0.5 h to 1 h and is then cast into an aluminum alloy; the aluminum alloy is subjected to solution treatment of 520 DEG C to 530 DEG C for 3 h to 5 h, aging treatment is conducted on the aluminum alloy for 8 h to 10 h at a temperature ranging from 210 DEG C to 220 DEG C after water quenching, and then the aluminum alloy is naturally cooled in a furnace. The cast aluminum alloy capable of being subjected to anodic oxidation has the beneficial effects of being good in casting mobility, high in mechanical property, uniform in oxide film thickness and bright in color and luster.

Description

technical field [0001] The invention belongs to the field of aluminum alloy manufacturing, and in particular relates to an anodic oxidizable cast aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloy has the characteristics of light weight, good strength and toughness, corrosion resistance and unique metallic luster, and is used in more and more communications, home appliances, hardware products, power tools, toys, doors, windows and bathrooms. At the same time, with the continuous improvement of people's living standards, the requirements for the surface finish, wear resistance, corrosion resistance and mechanical properties of aluminum alloy castings are also getting higher and higher. [0003] Traditional cast aluminum alloys mainly include four categories: Al-Si, Al-Cu, Al-Mg and Al-Zn. Al-Si cast aluminum alloys are currently the most widely used cast aluminum alloys. Machining performance, widely used in gravity casting, low pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/03C22F1/047
CPCC22C1/026C22C1/03C22C21/08C22F1/047
Inventor 王顺成宋东福毛文龙郑开宏
Owner GUANGDONG INST OF NEW MATERIALS
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