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A kind of 7 series aluminum alloy and preparation method thereof

A technology of aluminum alloy and master alloy, which is applied in the field of aluminum alloy to achieve the effect of satisfying the high gloss appearance and sandblasting anode effect, improving the strengthening phase of magnesium and zinc, and improving the mechanical properties

Active Publication Date: 2020-12-25
SICHUAN FURONG TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, although many 7-series aluminum alloy products have appeared, which have better mechanical properties than 6-series aluminum alloys, in order to meet higher market demand, the mechanical properties of the existing 7-series aluminum alloys , corrosion resistance, fracture toughness and fatigue resistance still need to be further improved

Method used

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  • A kind of 7 series aluminum alloy and preparation method thereof
  • A kind of 7 series aluminum alloy and preparation method thereof
  • A kind of 7 series aluminum alloy and preparation method thereof

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preparation example Construction

[0029] A method for preparing a 7-series aluminum alloy, which comprises batching, melting and stirring in sequence according to the components of the above-mentioned 7-series aluminum alloy, and adding an intermediate alloy containing rare earth cerium in an amount of 0.01-0.015% by weight to obtain a first melt ; The first melt is subjected to refining for the first time, slag removal for the first time, and standing for the first time in sequence, and the first melt after the first standing is subjected to heat preservation treatment to obtain a second melt; The second melt is sequentially subjected to the second refining, the second slag removal and the second standing to obtain the third melt; the third melt is sequentially subjected to online vacuum degassing, plate filtration and tube filtration purification, Then, semi-continuous oil-air sliding is used for casting under the condition of liquid cavity temperature of 670-690° C., followed by homogenization and cooling tr...

Embodiment 1

[0044] The 7-series aluminum alloy of this embodiment is composed of the following components in weight percentage: 1.95% magnesium, 0.04% silicon, 0.04% iron, 0.15% copper, 0.023% titanium, 5.68% zinc, 0.16% manganese and 0.02% zirconium, balance aluminum.

[0045] In the preparation method of the 7-series aluminum alloy in this embodiment, batching, melting and stirring are carried out sequentially according to the components of the above-mentioned 7-series aluminum alloy, and an intermediate alloy containing rare earth cerium is added in an amount of 0.01% by weight to obtain the first melt ; The first melt is subjected to refining for the first time, slag removal for the first time, and standing for the first time in sequence, and the first melt after the first standing is subjected to heat preservation treatment to obtain a second melt; The second melt is sequentially subjected to the second refining, the second slag removal and the second standing to obtain the third melt;...

Embodiment 2

[0047] The 7 series aluminum alloy of this embodiment is composed of the following components in weight percentage: 2.2% magnesium, 0.1% silicon, 0.06% iron, 0.33% copper, 0.028% titanium, 6.05% zinc, 0.26% manganese and 0.05% zirconium, the balance aluminum.

[0048] In the preparation method of the 7-series aluminum alloy in this embodiment, batching, melting and stirring are carried out in sequence according to the components of the above-mentioned 7-series aluminum alloy, and an intermediate alloy containing rare earth cerium is added in an amount of 0.015% by weight to obtain the first melt ; The first melt is subjected to refining for the first time, slag removal for the first time, and standing for the first time in sequence, and the first melt after the first standing is subjected to heat preservation treatment to obtain a second melt; The second melt is sequentially subjected to the second refining, the second slag removal and the second standing to obtain the third m...

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Abstract

The invention relates to a 7-series aluminum alloy and a preparation method thereof. The 7-series aluminum alloy comprises the following components in percentage by weight: 1.95-2.2% of magnesium, 0.04-0.1% of silicon, 0.04-0.06% of iron, 0.15-0.33% of copper, 0.023-0.028% of titanium, 5.68-6.05% of zinc, 0.16-0.26% of manganese, 0.02-0.05% of zirconium, and the balance of aluminum. The 7-series aluminum alloy has the advantages of the tensile strength of above 470, the yield strength of above 440, the Vickers hardness HV of above 160 and excellent rupture toughness and fatigue resistance.

Description

technical field [0001] The invention relates to aluminum alloy technology, and its characteristics relate to a 7-series aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloys are made by adding some alloying elements to pure aluminum, such as Al-Mn alloys developed by adding manganese elements to pure aluminum, Al-Cu alloys developed by adding copper elements to pure aluminum, and copper added to pure aluminum at the same time. Al-Cu-Mg series hard aluminum alloys were developed with magnesium elements, and Al-Zn-Mg-Cu series superhard aluminum alloys were developed by adding zinc, magnesium, and copper elements to pure aluminum at the same time. Aluminum alloy is characterized by lightness, high strength, good heat dissipation, good hand feeling and easy anodizing and coloring. Under the same strength requirements, aluminum alloy parts can be made thinner and lighter than plastic parts, and at the same time can meet the requirements ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C1/026C22C1/03C22C21/10C22F1/053
Inventor 胡俊强李成龙王川王仁杰
Owner SICHUAN FURONG TECHNOLOGY CO LTD
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