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Preparation method of reclaimed 7075 aluminum alloy containing rare earth

An aluminum alloy and alloy technology, which is applied in the field of the preparation of recycled 7075 aluminum alloy, can solve problems such as large energy consumption, and achieve the effects of reducing environmental pressure, reducing consumption and improving recovery rate.

Inactive Publication Date: 2012-04-18
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem of large energy consumption in the traditional 7075 aluminum alloy preparation process, the present invention provides a preparation method of recycled 7075 aluminum alloy containing rare earths, which uses waste aluminum materials to partially replace pure aluminum as raw materials, reduces the consumption of pure aluminum, and indirectly causes To reduce the consumption of pure aluminum and reduce the environmental pressure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Wash the waste 6063 aluminum alloy with a sodium hydroxide solution with a weight concentration of 5% and a temperature of 65±5°C to remove surface impurities, then wash with water to remove the sodium hydroxide solution, then dry it at 150-200°C for 30 minutes, and then test its composition ;

[0028] Prepare metal aluminum, metal silicon, metal magnesium, metal zinc, Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy, Al-3Ti alloy and Al-10La alloy as the melting material alloy, so that the melting material alloy and waste 6063 aluminum The total composition of the alloy by weight percentage is Si0.35%, Cu1.6%, Mn0.30%, Mg2.5%, Cr0.25%, Zn5.5%, Ti0.20%, La0.05%, the balance For aluminum and unavoidable impurities, prepare excess metal magnesium to account for 5% of the total weight of metal magnesium in the smelting alloy material; wherein the weight of scrap 6063 aluminum alloy accounts for 55% of the total weight of the smelting material alloy and scrap 6063 aluminum alloy;...

Embodiment 2

[0037] Wash the waste 6063 aluminum alloy with a sodium hydroxide solution with a weight concentration of 6% and a temperature of 65±5°C to remove surface impurities, then wash with water to remove the sodium hydroxide solution, then dry it at 150-200°C for 40 minutes, and then test its composition ;

[0038] Prepare metal aluminum, metal silicon, metal magnesium, metal zinc, Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy, Al-3Ti alloy and Al-10La alloy as the melting material alloy, so that the melting material alloy and waste 6063 aluminum The total composition of the alloy is Si0.35% by weight, Cu1.6%, Mn0.30%, Mg2.5%, Cr0.25%, Zn5.5%, Ti0.20%, La0.1%, and the balance For aluminum and unavoidable impurities, prepare excess metal magnesium to account for 3% of the total weight of metal magnesium in the smelted alloy material; wherein the weight of scrap 6063 aluminum alloy accounts for 45% of the total weight of the smelted material alloy and scrap 6063 aluminum alloy;

[0039]...

Embodiment 3

[0047] Wash the waste 6063 aluminum alloy with a sodium hydroxide solution with a weight concentration of 8% and a temperature of 65±5°C to remove surface impurities, then wash with water to remove the sodium hydroxide solution, then dry it at 150-200°C for 30 minutes, and then test its composition ;

[0048] Prepare metal aluminum, metal silicon, metal magnesium, metal zinc, Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy, Al-3Ti alloy and Al-10La alloy as the melting material alloy, so that the melting material alloy and waste 6063 aluminum The total composition of the alloy by weight percentage is Si0.35%, Cu1.6%, Mn0.30%, Mg2.5%, Cr0.25%, Zn5.5%, Ti0.20%, La0.3%, the balance For aluminum and unavoidable impurities, prepare excess metal magnesium to account for 4% of the total weight of metal magnesium in the smelted alloy material; wherein the weight of scrap 6063 aluminum alloy accounts for 50% of the total weight of the smelted material alloy and scrap 6063 aluminum alloy;

...

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Abstract

The invention discloses a preparation method of reclaimed 7075 aluminum alloy containing rare earth. The invention belongs to the technical field of materials. the method comprises steps that: surface impurities are removed from waste 6063 aluminum; smelting material alloys are prepared; metal aluminum is heated until melted; a mixed salt is added to the melted aluminum; the waste 6063 aluminum is added to the mixture, and the mixture is melted; metal silicon, Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy and Al-3Ti alloy are pressed in the mixture and are melted; Al-RE alloy, metal magnesium and excess metal magnesium and metal zinc are added to the mixture; the mixture is melted and heated; mixed gas of argon and nitrogen is delivered into the mixture; the mixture is settled and used for casting; a cast ingot is subject to preheating and hot rolling; the rolled material is subject to a solid solution treatment and water quenching; then the material is subject to an aging treatment for 15-20h under a temperature condition of 110-115 DEG C. With the method, the consumption of industrial pure aluminum is reduced, waste aluminum is cyclically utilized, and sustainable development of aluminum industries can be realized. The method has advantages of high recovery rate, low cost, and low pollution.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a rare earth-containing recycled 7075 aluminum alloy. Background technique [0002] 7075 aluminum alloy belongs to 7XXX series ultra-high-strength deformed aluminum alloy, which is widely used in aircraft manufacturing industry, as well as blow molding molds, golf ball heads, shoe molds, paper molds, foam molding molds, dewaxing molds, templates, Fixtures, mechanical equipment, mold processing and other corrosion-resistant high-stress structural parts; solution treatment can improve its plasticity, and heat treatment can improve its strength. [0003] For a long time, most aluminum alloys such as 7075 have been prepared with industrial pure aluminum as the main raw material. Industrial pure aluminum is generally produced by electrolysis. In this process, a large amount of mineral resources such as bauxite, coal, limestone and water and natura...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C21/10C22F1/053
Inventor 高波涂赣锋李世伟尹少华郝仪江飞左良于福晓付高峰
Owner NORTHEASTERN UNIV
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