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Refining method of aluminum-silicon cast aluminum alloy

A technology for casting aluminum alloys and aluminum-silicon systems, applied in the field of metal materials, can solve the problems of reducing the cleanliness of aluminum alloy ingots, achieve the effects of reducing wettability, strengthening refining effects, and improving quality

Active Publication Date: 2018-03-06
CHINA ZHONGWANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, in order to solve the problem that the decomposition temperature of commonly used refining agents is higher than that of aluminum, the refining agents will be dissolved in molten aluminum, and the aluminum alloy ingots contain these refining agents, reducing the cleanliness of aluminum alloy ingots. Provided is a refining method for aluminum-silicon-based cast aluminum alloys

Method used

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  • Refining method of aluminum-silicon cast aluminum alloy
  • Refining method of aluminum-silicon cast aluminum alloy
  • Refining method of aluminum-silicon cast aluminum alloy

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0022] A method for refining aluminum-silicon-based cast aluminum alloys, comprising the steps of:

[0023] A. Ingredients: The mass percentage ratio of each element in the aluminum alloy ingot raw material is as follows:

[0024]

[0025]

[0026] The various raw material components of the above-mentioned mass parts are weighed according to the mass percentage and prepared;

[0027] B. Melting: Put all the raw material components weighed in step A into the melting furnace for smelting. Thinning, degassing, filtering, casting;

[0028] C, deslagging and degassing: take by weighing a certain quality dried alum KAl(SO 4 ) 2 12H 2 O, put the alum dried in the oven and nitrogen with a purity of 99.5% into the molten aluminum through a spray gun, wherein the addition rate of the alum is 10% kg / tAl, and the nitrogen is injected into the molten aluminum through the graphite rotor, and the nitrogen from the smelting The bottom of the furnace is fed into the furnace. During ...

Embodiment 2

[0032] The difference between embodiment 2 and embodiment 1 is that the ratio of the mass percentage of each element in the aluminum alloy ingot raw material in step A is as follows:

[0033] element

Embodiment 3

[0035] The difference between embodiment 3 and embodiment 1 is that the ratio of the mass percentage of each element in the aluminum alloy ingot raw material in step A is as follows:

[0036] element

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Abstract

The invention belongs to the field of metal materials, and relates to a refining method for an aluminum-silicon cast aluminum alloy. An aluminum alloy ingot raw material comprises the following elements in percentage by mass: 10.5-11.5% of Si, 0.3-0.5% of Mn, 0.2-0.3% of Mg, 0.3-0.6% of Fe, less than or equal to 3.5% of Cu, less than or equal to 0.9% of Zn, less than or equal to 0.3% of Sn, 0.2-0.5% of Ni and the balance of Al. Dried alum is sent into molten aluminum together with an inert gas by a spray gun, wherein the alum addition rate is 1-10%kg / t in Al, the inert gas is injected into themolten aluminum through a graphite rotor, and the bubble diameter of the prepared molten aluminum is less than 1mm. An aluminum alloy ingot obtained by refining the molten aluminum by the refining method for casting an aluminum alloy material, provided by the invention, has a hydrogen content of less than 0.25cc in 100g of Al and an impurity content of less than 200ppm in 100g of Al.

Description

technical field [0001] The invention belongs to the field of metal materials and relates to a refining method of aluminum-silicon series cast aluminum alloys. Background technique [0002] During the smelting and casting process of aluminum and aluminum alloys, the dissolved hydrogen atoms in the melt are prone to form bubbles after being precipitated during casting solidification, resulting in defects in aluminum and aluminum alloy ingots or castings. At the same time, during the smelting process, the melt reacts with the air to form oxides, and being involved in the melt will reduce its purity. If it is not removed in the subsequent production, oxide inclusions will be formed in the ingot or casting, which will affect the performance of the product. . Therefore, in the production of aluminum and aluminum alloys, refining treatment must be carried out to reduce the hydrogen content and remove inclusions. During the casting and solidification of aluminum and aluminum alloy...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C1/02C22C21/02
Inventor 马青梅李菁菁曹帅叶尚英
Owner CHINA ZHONGWANG
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