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Method for preparing regenerated ADC12 aluminum alloy from scrap aluminum

An ADC12, aluminum alloy technology, applied in the field of secondary aluminum alloy formulation and its preparation, can solve problems such as can not be effectively solved, and achieve the effects of reducing stress corrosion cracking sensitivity, increasing mechanical properties, and improving purity and performance.

Active Publication Date: 2021-08-20
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Can not effectively solve the problems existing in the prior art

Method used

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  • Method for preparing regenerated ADC12 aluminum alloy from scrap aluminum
  • Method for preparing regenerated ADC12 aluminum alloy from scrap aluminum
  • Method for preparing regenerated ADC12 aluminum alloy from scrap aluminum

Examples

Experimental program
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Embodiment 1

[0030]Example 1. Al-10.22Si-3.0Cu-0.05La-0.05Ce-0.05Y-0.05Mn-0.05Cr (wt.%) secondary aluminum alloy and its preparation.

[0031] The preparation method described in this embodiment specifically includes the following steps.

[0032] (1) Raw material smelting: Weigh the ADC12 regenerated aluminum obtained in Comparative Example 1, and then heat and smelt it in a vacuum high-frequency induction electromagnetic induction furnace.

[0033] (2) Refining and alloy composition adjustment: After the melted secondary aluminum alloy melt in step (1) is cooled to 730 °C, Al-30RE, Al-30Mn, and Al-20Cr are added to it for refining and modification, and the slag is removed after holding for 20 minutes , filtered, wherein RE is a mixed rare earth of La, Ce and Y; then according to the composition according to the mass percentage, adding industrial pure Al, Al-30Si master alloy to adjust the composition, after the master alloy is completely melted, stir evenly, and then feed nitrogen, The ...

Embodiment 2

[0037] Example 2. Al-9.9Si-2.72Cu-0.1La-0.1Ce-0.1Y-0.05Mn-0.05Cr (wt.%) secondary aluminum alloy and its preparation.

[0038] The preparation method described in this embodiment specifically includes the following steps.

[0039] (1) Raw material smelting: Weigh the ADC12 regenerated aluminum obtained in Comparative Example 1, and then heat and smelt it in a vacuum high-frequency induction electromagnetic induction furnace.

[0040] (2) Refining and alloy composition adjustment: After the melted secondary aluminum alloy melt in step (1) is cooled to 730 °C, Al-30RE, Al-30Mn, and Al-20Cr are added to it for refining and modification, and the slag is removed after holding for 20 minutes , filter, wherein RE is a mixed rare earth of La, Ce, Y; then according to the composition according to the mass percentage, add industrial pure Al, Al-30Si master alloy to adjust the composition, after the master alloy is completely melted, stir evenly, and then feed nitrogen, The time was co...

Embodiment 3

[0050] Example 3. Al-10.23Si-3.1Cu-0.15La-0.15Ce-0.15Y-0.08Mn-0.08Cr (wt.%) secondary aluminum alloy and its preparation.

[0051] The preparation method described in this embodiment specifically includes the following steps.

[0052] (1) Raw material smelting: Weigh the ADC12 regenerated aluminum obtained in Comparative Example 2, and then heat and smelt it in a vacuum high-frequency induction electromagnetic induction furnace.

[0053] (2) Refining and alloy composition adjustment: After the melted secondary aluminum alloy melt in step (1) is cooled to 730 °C, Al-30RE, Al-30Mn, and Al-20Cr are added to it for refining and modification, and the slag is removed after holding for 20 minutes , filter, wherein RE is a mixed rare earth of La, Ce, Y; then according to the composition according to the mass percentage, add industrial pure Al, Al-30Si master alloy to adjust the composition, after the master alloy is completely melted, stir evenly, and then feed nitrogen, The time is...

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Abstract

The invention discloses a method for preparing a regenerated ADC12 aluminum alloy from scrap aluminum. The method comprises the following steps that the scrap aluminum is heated and smelted through a vacuum high-frequency induction electromagnetic induction furnace to be fully melted, and argon is introduced for degassing; a melt is cooled to 730 DEG C, Al-30RE, Al-10Mn and Al-10Cr are added for refining and modification, graphite rod stirring and slagging off after temperature maintaining are conducted, and filtering is conducted; industrial pure Al and Al-30Si intermediate alloy components are added for adjusting, after melting, uniform stirring is conducted, nitrogen is blown, and standing is conducted to obtain the regenerated aluminum alloy. According to the method, impurities which are difficult to remove are converted into strengthening phases and are uniformly distributed on a matrix. Meanwhile, a thick needle-shaped Fe-rich phase is effectively crushed, and the cutting influence of the Fe-rich phase on the matrix is eliminated. A flaky eutectic Si phase is refined into a short rod shape or a fiber shape, so that the cutting influence on the matrix is weakened. The mechanical property of the aluminum alloy can be effectively improved. The method is simple, low in cost and beneficial to industrialization.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a recycled aluminum alloy formula and a preparation method thereof. Background technique [0002] Aluminum products for vehicles are often combined with Fe and Cu-based components or assembled with Fe-based connectors. These recycled aluminum products are often packaged and sent to aluminum processing companies without distinction. Therefore, a thick acicular iron-rich phase will be produced during the solidification process, which will split the aluminum alloy matrix and reduce the mechanical properties of the aluminum alloy. The content of Fe and Cu in secondary aluminum alloy seriously exceeds the national standard. In addition, the content of impurity elements such as Mg, Zn, and Ni is also high. At the same time, ADC12 has practical problems such as low strength, poor plasticity, and general machinability, making it difficult to meet the requirements of higher-stren...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C1/06C22C21/04C22B7/00C22B21/06
CPCC22C1/026C22C1/03C22C1/06C22C21/04C22B7/001C22B21/062Y02P10/20
Inventor 刘勇袁来兴张永刘毅易光斌
Owner NANCHANG UNIV