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Aluminum alloy degasifying agent

A degassing agent, aluminum alloy technology, applied in the field of metal material casting, can solve problems such as high toxicity and inability to achieve complete sealing, and achieve the effect of improving floating and increasing the degree of agitation

Inactive Publication Date: 2013-02-06
黄宣斐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the refining process of aluminum alloy, it cannot be completely sealed, and it is more harmful to the human body and the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Put 13% of ammonium carbonate, 25% of activated carbon and the rest of calcium carbonate into an oven at 120-130°C to remove moisture and keep warm for 2 hours, then lower the above materials to room temperature and mix them evenly.

Embodiment 2

[0015] Put 15% of ammonium carbonate, 22% of activated carbon and the rest of calcium carbonate into an oven at 120-130°C to remove moisture and keep warm for 2 hours, then lower the above materials to room temperature and mix well.

Embodiment 3

[0017] Put 14% of ammonium carbonate, 23% of activated carbon and the rest of calcium carbonate into an oven at 120-130°C to remove moisture and keep warm for 2 hours, then lower the above materials to room temperature and mix well.

[0018] The usage amount of the present invention is to add 0.2-0.3% degassing agent according to the mass of the aluminum alloy. Other usage methods have no obvious difference with the prior art.

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PUM

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Abstract

The invention relates to an aluminum alloy degasifying agent which consists of the following components in percentage by weight: 13-15 percent of ammonium carbonate, 22-25 percent of activated carbon and the balance of calcium carbonate. The ammonium carbonate is decomposed at high temperature and reacts with hydrogen and oxygen in an aluminum alloy liquid, and thus gases such as carbon dioxide, nitrogen dioxide, water vapor, ammonia gas and small amount of methane are filtered. Due to the generation of the water vapor, the stirring degree of the melt aluminum alloy liquid is improved and the escape of the gases and the floating of aluminum slag are improved.

Description

technical field [0001] The invention belongs to the field of metal material casting, in particular to an aluminum alloy degasser. Background technique [0002] During the metal casting process, a certain amount of gas will be generated, and the presence of gas inside the metal will affect the strength and performance of the metal. Especially the presence of hydrogen will lead to the increase of metal brittleness and even lead to serious consequences. [0003] Aluminum alloys are widely used in the metal field, especially in the engine and aerospace fields, which have strict requirements on aluminum alloy castings. In the refining and casting process of aluminum alloy, it is an indispensable procedure to add a degasser to remove hydrogen. At present, aluminum alloy refining enterprises mainly use degassing agents made of carbon tetrachloride, carbon hexachloride, and zinc chloride to remove hydrogen, but the hydrogen removal effect is not ideal, and there is serious hydroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C21/00C22B21/06
Inventor 黄宣斐
Owner 黄宣斐
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