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
CN107760902AActive Publication Date: 2018-03-06CHINA ZHONGWANG
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
CHINA ZHONGWANG
Publication Date
2018-03-06

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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.
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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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