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Aluminum alloy and preparation method thereof

An aluminum alloy and aluminum alloy ingot casting technology, which is applied in the field of aluminum alloy, can solve the problems affecting the appearance and coloring effect, and achieve the effect of good anodic oxidation performance, bright color and high transparency

Inactive Publication Date: 2017-06-27
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, it is also hoped that the surface of the 7000 series aluminum alloy can obtain a silvery white with metallic luster after anodic oxidation treatment, so as to bring a sense of luxury and the diversity of subsequent coloring. The color of the film is obviously yellowish, which directly affects the appearance and subsequent coloring effect

Method used

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preparation example Construction

[0027] The present invention also provides a method for preparing an aluminum alloy, the method comprising melting the aluminum alloy raw material to prepare an aluminum alloy ingot, the composition of the aluminum alloy raw material is such that the composition and weight content of the obtained aluminum alloy ingot are: Zn 5-8%,

[0028] Mg 1.2-3.2%,

[0029] Ga 0.001-0.15%,

[0030] V 0.001-0.1%,

[0031] Ti 0.001-0.2%,

[0032] Si 0.2% or less,

[0033] Fe 0.2% or less,

[0034] Cu 0.2% or less,

[0035] The balance is Al and other unavoidable impurity elements.

[0036] In the method of the present invention, it further includes forming the aluminum alloy ingot into an aluminum alloy piece.

[0037] In the present invention, the forming method is not particularly limited, and may be various alloy forming methods commonly used in the art. In the present invention, it is further preferred that the forming method is rolling forming or extrusion forming. In the presen...

Embodiment 1

[0046] After calculating the ingredients, weigh each master alloy and elemental metal by weight, and then smelt it according to the aluminum alloy smelting sample preparation process provided above to obtain an aluminum alloy ingot. The weight ratio of each master alloy and elemental metal is shown in Table 1. Then, the aluminum alloy ingot was kept at 415°C for 3.5 hours, and then heated to 470°C for 14 hours for homogenization treatment; then, the temperature of the aluminum alloy ingot was set at 435°C for rolling processing to obtain a rolled For aluminum alloy parts, the aluminum alloy parts are subjected to solution treatment at 475°C / 1h, cooled with 25-30°C water, and then stretched with a deformation of 1%. Finally, artificial aging treatment is performed: heating at 100°C for 5 hours, Then heated to 125° C. and kept for 18 hours to prepare the aluminum alloy part A1.

Embodiment 2

[0048] After calculating the ingredients, weigh each master alloy and elemental metal by weight, and then smelt it according to the aluminum alloy smelting sample preparation process provided above to obtain an aluminum alloy ingot. The weight ratio of each master alloy and elemental metal is shown in Table 1. Then, the aluminum alloy ingot was kept at 425°C for 4 hours, and then heated to 475°C for 15 hours for homogenization treatment; then, the temperature of the aluminum alloy ingot was set at 445°C for rolling processing to obtain rolled For aluminum alloy parts, the aluminum alloy parts are subjected to solution treatment at 485°C / 1.5h, cooled with 25-30°C water, and then stretched, with a deformation of 1.5%. Finally, artificial aging treatment is performed: heating at 105°C for 6 hours , and then heated to 130° C. for 20 hours to prepare the aluminum alloy part A2.

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Abstract

The invention provides an aluminum alloy and a preparation method of the aluminum alloy. The aluminum alloy comprises, by weight, 5%-8% of Zn, 1.2%-3.2% of Mg, 0.001%-0.15% of Ga, 0.001%-0.1% of V, 0.001%-0.2% of Ti, not larger than 0.2% of Si, not larger than 0.2% of Fe, not larger than 0.2% of Cu and the balance Al and inevitable impurity elements. The aluminum alloy keeps high yield strength, and the yield strength reaches over 440 MPa; and meanwhile, the aluminum alloy keeps good anodic oxidation performance, and an oxidation film is silvery white and uniform and bright in color and luster.

Description

technical field [0001] The invention belongs to the field of aluminum alloys, and more specifically, the invention relates to an aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloy is an alloy composed of aluminum and other elements. It has the advantages of small specific gravity, high strength, corrosion resistance, good electrical and thermal conductivity, environmental protection, and recyclability. It has become one of the most widely used materials in daily life. In the early 20th century, the Germans invented the hard aluminum alloy (Al-Cu-Mg alloy), which doubled the strength of aluminum, and thus began to be widely used in aircraft manufacturing and other arms industries. Since then, Al-Mn, Al-Mg, Al-Mg-Si, Al-Cu-Mg, Al-Zn-Mg and other aluminum alloys with different compositions and heat treatment states have been developed successively, which greatly expands the use of aluminum alloys and makes aluminum The application of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22F1/053
CPCC22C21/00C22C21/10C22F1/053
Inventor 宫清吴波李江恒
Owner BYD CO LTD
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