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Aluminum-scandium intermediate alloy and preparation technology thereof

A master alloy, aluminum scandium technology, applied in the field of aluminum scandium master alloy and its preparation technology, can solve the problems of easy segregation, high cost of aluminum scandium master alloy, etc., and achieve the effect of excellent comprehensive performance, high recovery rate and good economic benefits

Inactive Publication Date: 2018-01-16
深圳市中金环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the shortcomings of high cost and easy segregation in the preparation of aluminum-scandium master alloys by the existing pairing method, improves them, and provides an aluminum-scandium master alloy and its preparation method

Method used

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  • Aluminum-scandium intermediate alloy and preparation technology thereof

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preparation example Construction

[0024] A method for preparing the above-mentioned aluminum-scandium master alloy is characterized in that it comprises the following steps:

[0025] A. Prepare nano-scandium powder with a diameter of 50-100nm, high-purity aluminum ingots, high-purity aluminum foil, and high-purity argon as a protective gas according to weight percentage;

[0026] B. First put the high-purity aluminum ingot into a graphite crucible, use a resistance furnace to heat it to 950°C to melt, and pass high-purity argon on the surface of the melt for protection;

[0027] C. Put nano-scandium powder with a diameter of 50-100nm into high-purity aluminum foil and wrap it tightly, press it into the liquid aluminum melt after vacuuming, and keep it for 10 minutes;

[0028] D. Use electromagnetic stirring technology to uniformly stir the melt for 5-10 minutes to make the scandium evenly distributed;

[0029] E. Pour the qualified aluminum-scandium alloy melt into the preheated water-cooled iron mold, the pouring tempe...

Embodiment 1

[0033] An aluminum-scandium master alloy. The components and weight percentages of the aluminum-scandium master alloy are: Sc: 2.0%; C: 0.03%; Cu: 0.02%; Fe: 0.08%; Si: 0.004%; the balance is Al .

[0034] A method for preparing the above-mentioned aluminum-scandium master alloy is characterized in that it comprises the following steps:

[0035] A. Prepare nano-scandium powder with a diameter of 50nm, high-purity aluminum ingot, high-purity aluminum foil, and high-purity argon as a protective gas according to weight percentage;

[0036] B. First put the high-purity aluminum ingot into a graphite crucible, use a resistance furnace to heat it to 950°C to melt, and pass high-purity argon on the surface of the melt for protection;

[0037] C. Put the nano-scandium powder with a diameter of 50nm into high-purity aluminum foil and wrap it tightly, press it into the liquid aluminum melt after vacuuming, and keep it for 10 minutes;

[0038] D. Use electromagnetic stirring technology to homogen...

Embodiment 2

[0042] An aluminum-scandium master alloy. The components and weight percentages of the aluminum-scandium master alloy are: Sc: 3.0%; C: 0.05%; Cu: 0.03%; Fe: 0.06%; Si: 0.003%; the balance is Al .

[0043] A method for preparing the above-mentioned aluminum-scandium master alloy is characterized in that it comprises the following steps:

[0044] A. Prepare nano-scandium powder with a diameter of 60nm, high-purity aluminum ingot, high-purity aluminum foil, and high-purity argon used as a protective gas according to weight percentage;

[0045] B. First put the high-purity aluminum ingot into a graphite crucible, use a resistance furnace to heat it to 950°C to melt, and pass high-purity argon on the surface of the melt for protection;

[0046] C. Put the nano-scandium powder with a diameter of 60nm into the high-purity aluminum foil and wrap it tightly, press it into the liquid aluminum melt after vacuuming, and keep it for 10 minutes;

[0047] D. Use electromagnetic stirring technology t...

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Abstract

The invention discloses an aluminum-scandium intermediate alloy, which comprises the following components in percentage by weight: 2.0 to 4.0% of Sc, not more than 0.05% of C, not more than 0.03% of Cu, not more than 0.08% of Fe, not more than 0.005% of Si, and the balance being Al. The invention also discloses a preparation method of the aluminum-scandium intermediate alloy. The preparation method comprises the following steps: preparing nano scandium powder with a diameter of 50-100 nm, high purity aluminum ingots, high purity aluminum foils, and high purity argon according to weight percentage; at first, adding high purity aluminum ingots into a graphite crucible, heating the graphite crucible to a temperature of 950 DEG C by a resistance furnace so as to melt aluminum ingots; tightly wrapping nano scandium powder by high purity aluminum foils, then pressing aluminum foils into liquid aluminum melt, keeping the aluminum foils in the aluminum melt for 10 minutes; uniformly stirring the melt for 5 to 10 minutes by an electromagnetic stirring technology so as to evenly distribute scandium; pouring qualified aluminum-scandium alloy melt into a preheated water-cooling iron mould, carrying out casting at a temperature of 800 DEG C, and cooling to the room temperature after casting. The preparation method has the advantages that segregation is overcome, the scandium loss is little,the recovery rate is high, compared with a conventional doping method, the cost is lower, and the economic benefit is good.

Description

Technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to an aluminum-scandium master alloy and a preparation process thereof. Background technique [0002] Scandium is a kind of modifier of aluminum alloy, and it can form dispersed Al with aluminum 3 The Sc phase greatly refines the structure of the aluminum alloy to increase its strength. The effect of scandium on the grain refinement of aluminum alloy is stronger than that of elements such as Ti, Zr, and V. The scandium-containing aluminum alloy has excellent comprehensive properties and can be widely used in aerospace and other fields. It is a lightweight structural material. But the melting point of scandium is as high as 1541°C, and its chemical properties are active. Therefore, when preparing an aluminum alloy containing scandium, the element scan must be added in the form of an aluminum scandium master alloy. At present, the three types of methods for preparing al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03
Inventor 李文玉
Owner 深圳市中金环保科技有限公司
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