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Aluminum-magnesium-zinc alloy and preparation method thereof

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

Active Publication Date: 2021-06-04
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% by weight of Al. In the present invention, increasing the content of the aluminum elemen...

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) The waste cathode aluminum plate (aluminum content greater than 99.7%) of the electrolytic zinc plant is deacidified with a sodium carbonate solution with a mass fraction of 20%, and then dried in the shade, and then preheated at 620°C for 1-2h successively. 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 ...

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) Deacidify the waste cathode aluminum plate (aluminum content greater than 99.7%) of the electrolytic zinc plant with a sodium carbonate solution with a mass fraction of 20%, and then dry it in the shade, then preheat it at 660°C for 1 hour, and then heat it at 700°C Melting at 800rpm for 0.5h, then 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 a preparation method thereof, and belongs to the field of aluminum alloy preparation. The aluminum-magnesium-zinc alloy is prepared from the following components in percentage by weight: 83% of Al, 11% of Zn, 3% of Mg, 0.2% of Si, 0.5% of Fe, 0.2% of Mn, 1.4% of Cu, 0.2% of Ti and 0.5% of lanthanide series mixed rare earth, and the lanthanide series mixed rare earth is prepared from 0.3% of La, 0.1% of Nd and 0.1% of Ce. The preparation method comprises the following steps of preheating a molten aluminum plate, performing electromagnetic stirring on the molten waste cathode aluminum plate, and performing heat treatment on a cast ingot. Data of the embodiment shows that the hardness of the aluminum-magnesium-zinc alloy is 130 BHN, the tensile strength is 400 MPa, the elongation is 0.85%, the salt spray resistance treatment lasts for 100 hours or above, and corrosion resistance and wear resistance are shown.

Description

[0001] This application is a divisional application of a Chinese patent application submitted to the China Patent Office on September 6, 2017 with the application number CN201710797518.6 and the title of the invention "An Al-Mg-Zn Alloy and Its Preparation Method", the entire contents of which are incorporated by reference in this application. technical field [0002] The invention relates to the technical field of aluminum alloys, in particular to an aluminum-magnesium-zinc alloy and a preparation method thereof. Background technique [0003] 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. [0004] Due to its excellent mechanical properties and casting properties and low price (only 1 / 2 to 1 / 3 of copper alloy), aluminum-magnesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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