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High strength Al-Mg-Si aluminium alloy and preparation method thereof

An al-mg-si, aluminum alloy technology, applied in the field of aluminum material manufacturing, can solve the problems of reducing the production efficiency of aluminum alloys, time-consuming aging treatment, etc., and achieve the effect of shortening production time, improving various properties, and high elongation

Active Publication Date: 2019-04-16
GUANGDONG JMA ALUMINUM PROFILE FACTORY GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, the aging treatment processes commonly used are: single-stage aging, double-stage aging, and three-stage aging; during the aging process, crystal precipitation can be promoted and the performance of aluminum alloys can be improved; however, aging treatment takes a long time and reduces the production efficiency of aluminum alloys

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  • High strength Al-Mg-Si aluminium alloy and preparation method thereof

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preparation example Construction

[0040] The invention discloses a method for preparing a high-strength Al-Mg-Si aluminum alloy, which comprises:

[0041] (1) preparing cast aluminum rods;

[0042] Specifically include:

[0043] (1) Put the aluminum ingot into the melting furnace, raise the temperature to 720-750°C, add the recycled waste after complete melting, and melt to obtain the first alloy liquid;

[0044] Among them, in the preparation process, the source of raw materials for aluminum includes aluminum ingots and furnace waste; the furnace waste includes extrusion head and tail, overpressure, rod head and rod tail, spraying waste, casting waste slag, electrophoretic material, etc. Preferably, the ratio of recycled waste to the whole aluminum raw material is ≤30%.

[0045] (2) adding silicon ingot, copper-aluminum alloy, chromium-aluminum alloy, manganese-aluminum alloy in sequence to the first alloy liquid, melting and mixing uniformly to obtain the second alloy liquid;

[0046] Among them, the allo...

Embodiment 1

[0076] alloy composition:

[0077] Si 0.98%, Mg 1.1%, Cu 0.42%, Mn 0.45%, Cr 0.1%, and the balance is Al.

[0078] Preparation:

[0079] (1) Put the aluminum ingot into the melting furnace, raise the temperature to 720°C, add the recycled waste after complete melting, and melt to obtain the first alloy liquid;

[0080] (2) Add high-purity silicon, Al-50Cu master alloy, Al-20Mn master alloy, and Al-10Cr master alloy in sequence in the first alloy liquid, add slag breaking agent after melting and mixing evenly, and remove scum , to obtain the second alloy liquid;

[0081] (3) adding magnesium ingots to the second alloy liquid and homogenizing to obtain the third alloy liquid;

[0082] (4) adding a slagging agent to the third alloy liquid, and removing the scum to obtain the fourth alloy liquid; wherein, the slag removal temperature is 750°C;

[0083] (5) Refining the fourth alloy liquid at 710° C. for 20 minutes; feeding high-purity argon during the refining process;

[008...

Embodiment 2

[0093] alloy composition

[0094] Si 0.95%, Mg 1.2%, Cu 0.35%, Mn 0.4%, Cr 0.2%, and the balance is Al.

[0095] Preparation:

[0096] (1) Put the aluminum ingot into the melting furnace, raise the temperature to 725°C, add the recycled waste after complete melting, and melt to obtain the first alloy liquid;

[0097] (2) Add high-purity silicon, Al-50Cu master alloy, Al-20Mn master alloy, and Al-10Cr master alloy in sequence in the first alloy liquid, add slag breaking agent after melting and mixing evenly, and remove scum , to obtain the second alloy liquid;

[0098] (3) adding magnesium ingots to the second alloy liquid and homogenizing to obtain the third alloy liquid;

[0099] (4) Adding a slagging agent to the third alloy liquid, and removing the scum to obtain the fourth alloy liquid; wherein, the slag removal temperature is 730°C;

[0100] (5) Refining the fourth alloy liquid at 715° C. for 20 minutes; feeding high-purity argon gas during the refining process;

[0...

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Abstract

The invention belongs to the field of aluminium alloys and particularly discloses a preparation method of a high strength Al-Mg-Si aluminium alloy. The preparation method includes the steps that an aluminium casting rod is prepared; two-stage homogenizing treatment is conducted; extruding is conducted; and artificial aging is conducted, wherein the aluminium casting rod is prepared from the components in percentage by weight: 0.95%-1.1% of Si, 0.8-1.2% of Mg, 0.35-0.45% of Cu, 0.4-0.5% of Mn, 0.1-0.2% of Cr and the balance of Al. The high strength Al-Mg-Si aluminium alloy has the characteristics that the intensity is high, and the elongation rate is high, the high intensity can be achieved through short time aging, the applied range is wide, and the production efficiency of the preparationmethod is high.

Description

technical field [0001] The invention relates to the field of aluminum material manufacturing, in particular to a high-strength Al-Mg-Si aluminum alloy and a preparation method thereof. Background technique [0002] Wrought aluminum alloy has high specific strength, high toughness, good processing performance and excellent corrosion resistance, and is widely used in aerospace, rail transit, automobile and civil construction and other fields. At present, thousands of commercial aluminum alloys of alloy grades have been developed at home and abroad. Among them, 6XXX series alloys, as a large category of wrought aluminum alloys, are widely used in the fields of electronic products, doors and windows, curtain walls, and industrial materials due to their low raw material cost, good formability, and surface treatment. However, the strength of 6XXX series aluminum alloys is relatively low, which seriously restricts its application in some profile members with high strength requirem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/05C22C1/02C22C1/06C22C21/02C22C21/08
CPCC22C1/026C22C1/06C22C21/02C22C21/08C22F1/05
Inventor 滕广标丁幸宇高森田周玉焕
Owner GUANGDONG JMA ALUMINUM PROFILE FACTORY GRP
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