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Strontium-containing aluminum alloy 6063 and preparation method thereof

An aluminum alloy, aluminum strontium intermediate alloy technology, applied in the field of aluminum alloys, can solve the problems that the mechanical properties of the car body cannot be met, the strength and hardness of the aluminum alloy are low, and achieve the advantages of improving the mechanical properties, increasing the tensile strength, and reducing the burning loss. Effect

Active Publication Date: 2019-01-25
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As people pay more and more attention to energy saving and environmental protection, automobiles are developing in the direction of lightweight, which puts forward higher requirements for the strength and plasticity of Al-M-Si alloys used as automotive structural parts, and natural aging The strength and hardness of aluminum alloys are relatively low, which cannot meet the mechanical performance requirements of the car body. Therefore, how to improve the strength of Al-Mg-Si aluminum alloys while maintaining a certain degree of plasticity has become the key to research.

Method used

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  • Strontium-containing aluminum alloy 6063 and preparation method thereof
  • Strontium-containing aluminum alloy 6063 and preparation method thereof
  • Strontium-containing aluminum alloy 6063 and preparation method thereof

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preparation example Construction

[0019] As an aspect of the technical solution of the present invention, it relates to a method for preparing a strontium-containing 6063 aluminum alloy, comprising the following steps:

[0020] (1) Add copper, aluminum-manganese, and aluminum-silicon intermediate alloys to the molten aluminum in sequence, and wait for 3 to 8 minutes after the alloy elements added are completely melted, and then lower the temperature of the first molten liquid formed to 730°C to 740°C ℃ and keep the temperature constant, then add magnesium ingots, and form a second melt after the magnesium ingots are completely melted, then add a modifier, Al-Sr master alloy, into the second melt, and completely immerse the Al-Sr master alloy in the In the second melt, after 10-20 minutes of heat preservation, high-purity nitrogen gas was introduced to refine for 10-20 minutes, and then left to stand for 10-20 minutes, and then poured to obtain 6063 aluminum alloy rods;

[0021] (2) Homogenize the obtained 6063...

Embodiment 1

[0041] Put the aluminum ingot in the melting furnace and heat it to the set temperature of 740°C; after the aluminum ingot is completely melted, add copper foam, aluminum-manganese, and aluminum-silicon intermediate alloys to the molten aluminum in turn, add alloy elements and let it stand still after melting completely After 3 minutes, the heating was stopped, and the temperature of the melt was lowered to 735°C, keeping the temperature constant. Then add the magnesium ingot that has removed the scale, and press the magnesium ingot into the lower part of the molten aluminum, heat to keep the melt temperature at 735°C, add the modifier Al-Sr master alloy after the magnesium ingot is completely melted, and press the Al-Sr master alloy Into the lower part of the aluminum liquid, keep warm for 15 minutes; then pass high-purity nitrogen containing sodium-free refining agent for refining, the ventilation time is 15 minutes, stand for 15 minutes, and then cast to obtain 6063 aluminum...

Embodiment 2

[0044]Put the aluminum ingot in the smelting furnace and heat it to the set temperature of 760°C; after the aluminum ingot is completely melted, add copper foam, aluminum-manganese, and aluminum-silicon intermediate alloys to the molten aluminum in turn, add alloy elements and let it stand still after melting completely After 8 minutes, the heating was stopped, and the temperature of the melt was lowered to 740° C., keeping the temperature constant. Then add the magnesium ingot that has removed the scale, and press the magnesium ingot into the lower part of the molten aluminum, heat to keep the melt temperature at 740°C, add the modifier Al-Sr master alloy after the magnesium ingot is completely melted, and press the Al-Sr master alloy Put it into the lower part of the aluminum liquid, keep it warm for 20 minutes; then pass high-purity nitrogen containing sodium-free refining agent for refining, the ventilation time is 10 minutes, stand for 10 minutes, and then cast to obtain 6...

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Abstract

The invention discloses a preparation method of a strontium-containing aluminum alloy 6063. The preparation method comprises the following steps of sequentially adding copper, aluminum-manganese, andaluminum-silicon intermediate alloy into aluminum melted liquid, standing after the added alloy element is completely melted, reducing the temperature of the formed first melted liquid to 730 to 740 DEG C, maintaining the temperature constant, adding a magnesium ingot, completely melting the magnesium ingot to form second melted liquid, adding a deterioration agent aluminum-strontium intermediatealloy into the second melted liquid, completely soaking the aluminum-strontium intermediate alloy into the second melted liquid, introducing high-purity nitrogen gas, refining, standing, and casting,so as to obtain a bar of aluminum alloy 6063; performing homogenization treatment on the obtained bar of aluminum alloy 6063, and cooling; extruding to form a profile with a needed shape and size; performing aging solution treatment on the profile, so as to obtain the strontium-containing aluminum alloy 6063. The strontium-containing aluminum alloy 6063 has the advantages that the aluminum-strontium intermediate alloy is added in the aluminum alloy melting process, and the mechanical property of the aluminum alloy is improved according to a deterioration theory of strontium and the refining function of crystal grains.

Description

technical field [0001] The invention relates to an aluminum alloy, in particular to a strontium-containing 6063 aluminum alloy and a preparation method thereof. Background technique [0002] The performance of 6063 aluminum alloy products produced by traditional element ratio is low, which cannot meet the performance requirements of auto industry components. Aluminum alloy is mainly used in building profiles, and the unit price of profiles is low. Enterprises usually make profits by expanding the total production volume, resulting in a waste of aluminum resources. [0003] 6063 aluminum alloy belongs to the Al-Mg-Si series of deformed aluminum alloys. Due to its high strength, good plasticity, excellent corrosion resistance, and oxidative coloring, it is widely used in doors, windows, curtain walls and other building profiles and On the components of industrial products such as automobiles and ships. As people pay more and more attention to energy saving and environmental ...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C1/06C22C21/00C22F1/05
Inventor 杨占寿陈小虎李波祁米香王舒娅邹兴武王云思
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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