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Aluminum magnesium zinc alloy and preparation method

An aluminum-magnesium-zinc and alloy technology, applied in the field of aluminum alloys, can solve problems such as poor dimensional stability and limiting the application range of aluminum-magnesium-zinc alloys

Inactive Publication Date: 2017-11-21
湖南鑫海环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current mature aluminum-magnesium-zinc alloys can only be used for low-speed and heavy-duty parts. There is a problem of poor dimensional stability for aluminum-magnesium-zinc alloy parts that work in high-speed motion and high-temperature environments, which seriously limits the use of aluminum-magnesium-zinc alloys. Application range

Method used

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preparation example Construction

[0032] The preparation method of described Al-Mg-Zn alloy comprises the following steps:

[0033] (1) The aluminum plate is sequentially preheated, melted and electromagnetically stirred to obtain molten aluminum;

[0034] (2) melting the molten aluminum obtained in the step (1) with zinc source, magnesium source, silicon source, copper source, iron source, manganese source, titanium source, lanthanide mixed rare earth and slag remover to obtain mixed melt;

[0035] (3) The mixed melt obtained in the step (2) is sequentially tempered and filtered to obtain a refining melt;

[0036] (4) casting the refining melt obtained in the step (3) to obtain an ingot;

[0037] (5) heat-treating the cast ingot obtained in the step (4) to obtain an aluminum-magnesium-zinc alloy.

[0038] According to the element composition, the Al-Mg-Zn alloy provided by the present invention preferably includes 83-84% by weight of Al, more preferably 83.5%. In the present invention, increasing the cont...

Embodiment 1

[0071] An aluminum-magnesium-zinc alloy, according to elemental composition, includes the following components in weight percentage: 84% Al, 11% Zn, 2% Mg, 0.3% Si, 0.5% Fe, 1.3% Cu , 0.2% Ti, 0.2% Mn, 0.5% lanthanide mixed rare earth (including 0.3% La, 0.1% Nd and 0.1 Ce).

[0072] The preparation method comprises the following steps:

[0073] (1) Deacidify the waste cathode aluminum plate (the aluminum content is preferably greater than 99.7%) in the electrolytic zinc plant with a sodium carbonate solution with a mass fraction of 20%, then dry in the shade, and then preheat at 620°C for 1-2h 1. Melt at 680°C for 0.5h, then perform electromagnetic stirring at 100rpm for 0.5h to obtain molten aluminum;

[0074] (2) Mix aluminum melt, zinc source, magnesium source, silicon source and copper source and melt at 630°C, then add lanthanide mixed rare earth and slag remover to mix and melt at 620°C to obtain a mixed melt. The amount of slag agent used is 0.005% of the mass of the...

Embodiment 2

[0080] An aluminum-magnesium-zinc alloy, according to elemental composition, comprises the following components in weight percentage:

[0081] 83% Al, 11% Zn, 3% Mg, 0.2% Si, 0.5% Fe, 1.4% Cu, 0.2% Ti, 0.2% Mn, 0.5% lanthanide mischmetal (including 0.3% La, 0.1% Nd and 0.1 Ce).

[0082] The preparation method comprises the following steps:

[0083](1) Use a sodium carbonate solution with a mass fraction of 20% to remove acid from the waste cathode aluminum plate (the aluminum content is preferably greater than 99.7%) in the electrolytic zinc plant, then dry it in the shade, and then preheat it at 660°C for 1 h, Melt at 700°C for 0.5h, then perform electromagnetic stirring at 800rpm for 0.2-0.3h to obtain molten aluminum;

[0084] (2) Mix aluminum melt, zinc source, magnesium source, silicon source and copper source and melt at 630°C, then add lanthanide mixed rare earth and slag remover to mix and melt at 620°C to obtain a mixed melt. The amount of slag agent used is 0.005%...

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Abstract

The invention provides an aluminum magnesium zinc alloy and belongs to the field of aluminum alloy preparation. The aluminum magnesium zinc alloy comprises the following components by weight percent: 83-84% of Al, 10-11% of Zn, 2-3% of Mg, 0.2-0.3% of Si, 0.5% of Fe, 0.2% of Mn, 1.2-1.5% of Cu, 0.1-0.2% of Ti and 0.5-1% of lanthanide series mixed rare earth, wherein the lanthanide series mixed rare earth includes 0.3% of La, 0.1% of Nd and the balance of Ce. A preparation method comprises the following steps: preheating a molten aluminum plate, electromagnetically stirring a molten waste cathode aluminum plate and performing thermal treatment on ingot casting. A data of the embodiment proves that the aluminum magnesium zinc alloy provided by the invention has the characteristics of hardness as high as 133BHN, tensile strength at 403MPa, elongation of 0.90%, salt mist resistance above 100 hours, corrosion resistance and abrasive resistance.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to an aluminum-magnesium-zinc alloy and a preparation method. Background technique [0002] With the worsening of the earth's environment, in order to save energy and prolong the service life of materials, users in construction, automobile, high-speed rail, aerospace and other industries have put forward higher requirements on the corrosion resistance and weather resistance of materials. [0003] Due to its excellent mechanical properties and casting properties and low price (only 1 / 2 to 1 / 3 of copper alloy), aluminum-magnesium-zinc alloy has gradually replaced bronze in many fields for manufacturing turbines, bearing bushes, sliders, and threads Sets and other wear-resistant parts. However, the current mature aluminum-magnesium-zinc alloys can only be used for low-speed and heavy-duty parts. There is a problem of poor dimensional stability for aluminum-magnesium-zinc alloy...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22F1/053C22C1/02
CPCC22C1/026C22C21/10C22F1/053
Inventor 刘河群刘海金周开金
Owner 湖南鑫海环保科技有限公司
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