Method of refining aluminum alloy

Patent metadata

Field	Value
Publication number	US-10494699-B2
Application number	US-201615072085-A
Country	US
Kind code	B2
Filing date	Mar 16, 2016
Priority date	Mar 19, 2015
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

The invention provides a method of refining aluminum alloy, which is characterized in that aluminum-based nanometer quasicrystal alloy is used as an aluminum alloy refiner to refine the aluminum alloy; the aluminum-based nanometer quasicrystal alloy does not comprise Si, Fe or Cr; the aluminum-based nanometer quasicrystal alloy consists of (1) Al; (2) Mn and (3) La and/or Ce. The refiner selected in the invention is rare earth-containing alloy which has a strong refinement ability on the aluminum alloy, and is nanometer quasicrystal; after adding the rare earth-containing alloy to melt, the element distribution of the rare earth-containing alloy is more uniform than that of traditional alloy; and nanometer quasicrystal particles substantially increase the number of heterogeneous nucleation particles and improve the grain refinement effect of the aluminum alloy.

First claim

The invention claimed is:

1. A method of refining an aluminum alloy, comprising:
melting the aluminum alloy to be processed;
adding 0.30%-0.60% of aluminum alloy refiner, by weight of the aluminum alloy to be processed, to the aluminum alloy as melted;
mechanically stirring the aluminum alloy as melted; and
after mechanically stirring the aluminum alloy as melted, deslagging the aluminum alloy,
wherein the aluminum alloy refiner is an aluminum-based nanometer quasicrystal alloy; and
the aluminum-based nanometer quasicrystal alloy consists of (1) Al; (2) Mn, and (3) La and/or Ce, and
the aluminum alloy is A356.2 aluminum alloy.

2. The method of claim 1 , wherein the aluminum-based nanometer quasicrystal alloy comprises 92 parts of the Al, 6 parts of the Mn and 2 parts of the La and/or Ce by atomic ratio.

3. The method of claim 1 , wherein the aluminum alloy refiner is pressed columnar test blocks.

4. The method of claim 1 , wherein a melting temperature of the aluminum alloy is 20 to 40 degrees Celsius higher than temperature of the aluminum-based nanometer quasicrystal alloy.

5. The method of claim 1 , wherein the aluminum alloy refiner is added in an amount of 0.45% by weight of the aluminum alloy refiner to be processed.

Assignees

• Citic Dicastal Co Ltd
• Univ Hebei Technology

Inventors

• Wang Lisheng
• Wang Yongning
• Zhu Zhihua
• Liu Chunhai
• Li Changhai
• A Lateng
• Zhang Zhendong
• Bai Bangwei
• Zhao Weimin
• Wang Zhifeng

Classifications

• C22C1/06 Primary

  with the use of special agents for refining or deoxidising · CPC title

• C22C21/00

  Alloys based on aluminium · CPC title

• C22C1/026

  Alloys based on aluminium · CPC title

• C22F1/04

  of aluminium or alloys based thereon · CPC title

• B22D45/00

  Equipment for casting, not otherwise provided for · CPC title