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Method for preparing aluminum neodymium intermediate alloy with high-intensity ultrasound

A technology of high-energy ultrasound and master alloy, which is applied in the field of high-energy ultrasound to prepare aluminum-neodymium master alloy, can solve the problems of difficult control of alloy composition, harm to human health, large fluctuation range, etc., and achieves stable rare earth content, convenient operation, and reduced energy consumption. Effect

Inactive Publication Date: 2012-11-14
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of electrolysis, toxic gases will be produced, which will pollute the environment and endanger human health.
In addition, the alloy composition is difficult to control and has a large fluctuation range

Method used

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  • Method for preparing aluminum neodymium intermediate alloy with high-intensity ultrasound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: First, put the pure aluminum ingot into the crucible and heat it to melt, wrap the rare earth neodymium particles with a diameter of 20-100um in aluminum foil, press them into the above pure aluminum melt, and keep it warm at 765°C for 30 minutes, wherein The rare earth neodymium content accounts for 35% of the total weight. Apply intermittent high-energy ultrasound at a place 10mm below the surface of the above alloy melt, with an ultrasound intensity of 0.7kw / cm 2 , the application time is 8 minutes, the application time of high-energy ultrasonic is 30 seconds each time, the intermittent time is 30 seconds, and then the alloy melt is lowered to 700 ° C for refining and impurity removal and pouring; the purity of the rare earth neodymium is 99.9%.

Embodiment 2

[0013] Example 2: First put the pure aluminum ingot into the crucible and heat it to melt, wrap the rare earth neodymium particles with a diameter of 20-100um in aluminum foil, press them into the above pure aluminum melt, and keep it warm at 775°C for 40 minutes, wherein The rare earth neodymium content accounts for 30% of the total weight. Apply intermittent high-energy ultrasound at a place 15mm below the surface of the alloy melt, with an ultrasound intensity of 0.8kw / cm 2 , the application time is 12 minutes, the application time of high-energy ultrasound is 40 seconds each time, and the intermittent time is 40 seconds, and then the alloy melt is lowered to 710 ° C for refining and impurity removal and pouring; the purity of the rare earth neodymium is 99.9%.

Embodiment 3

[0014] Example 3: First put the pure aluminum ingot into the crucible and heat it to melt, wrap the rare earth neodymium particles with a diameter of 20-100um in aluminum foil, press them into the above pure aluminum melt, and keep it warm at 785°C for 40 minutes, wherein The rare earth neodymium content accounts for 35% of the total weight. Apply intermittent high-energy ultrasound at a place 15mm below the liquid surface of the above-mentioned alloy melt, and the ultrasonic intensity is 0.9kw / cm 2 , the application time is 15 minutes, the high-energy ultrasonic application time is 50 seconds each time, and the intermittent time is 50 seconds, and then the alloy melt is lowered to 710 ° C for refining and impurity removal and pouring; the purity of the rare earth neodymium is 99.9%.

[0015] attached figure 1 The metallographic diagram of the eutectic structure of the Al-Nd master alloy structure prepared in Example 2, it can be seen from the figure that the eutectic structu...

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Abstract

The invention provides a method for preparing aluminum neodymium intermediate alloy with high-intensity ultrasound. The method comprises the following steps: heating to melt pure aluminum ingot in a crucible, wrapping rare earth neodymium particle through a piece of aluminized paper, and pressing into the pure magnesium melt, and preserving the temperature for 30 to 40 minutes within 765 to 785 DEG C, wherein the rare earth neodymium is 30 to 35% of the total weight; carrying out high-intensity ultrasound in a position 10 to 15mm below the alloy melt liquid surface for 8 to 15 minutes at 0.7 to 0.9 kw / cm<2> under an intermittent mode, wherein the high-intensity ultrasound is carried out for 30 to 50 seconds each time, with the intermitting time is 30 to 50 seconds; and then cooling the alloy melt to 700 to 710 DEG C, and refining and removing the impurity, and finally casting. According to the method, the rare earth can be avoided being burned effectively, and rare earth content is stable, and the energy consumption is reduced; and moreover, the method is simple in technology, and is safe and reliable, and harmful gas can not be generated, and the uniformity of the alloy component can be ensured, and the segregation is reduced.

Description

technical field [0001] The invention relates to a method for preparing a metal alloy, in particular to a method for preparing an aluminum-neodymium master alloy by high-energy ultrasound. Background technique [0002] Aluminum-rare-earth master alloy is an efficient refinement modifier with good refinement and modification effect. It is widely used in the refinement and modification of aluminum and its alloys. It can significantly refine the alloy structure and improve the mechanical properties of the alloy. In the long-term research, people continue to explore the preparation methods of aluminum-rare earth alloys. At present, the production methods of rare earth aluminum alloys are roughly summarized as follows: direct fusion method: adding rare earth or mixed rare earth metals to high temperature in a certain proportion In molten aluminum, an intermediate alloy is obtained. It is characterized by convenient operation and stable alloy composition content. The disadvantage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C1/03C22C21/00
Inventor 闫洪黄兴阮先明胡志
Owner NANCHANG UNIV
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