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Casting aluminum-silicon alloy and strengthening method thereof

A technology for casting aluminum-silicon alloys and aluminum-silicon intermediate alloys, which is applied in the strengthening of cast aluminum-silicon alloys, non-ferrous alloy materials and strengthening fields, can solve the problems that the potential strengthening effect of zinc cannot be fully exerted, and improve the plasticity and surface quality of materials And the effect of high dimensional accuracy and large application range

Active Publication Date: 2012-01-04
镇江汇通金属成型有限公司 +1
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Problems solved by technology

However, many current studies have determined the amount of zinc added in cast aluminum-silicon alloys to be 1%, resulting in the failure of the potential strengthening effect of zinc to be fully exerted.

Method used

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  • Casting aluminum-silicon alloy and strengthening method thereof

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Embodiment Construction

[0024] The following are three embodiments of the present invention, and the present invention is not limited to the following three embodiments.

[0025] The chemical composition of the cast aluminum-silicon alloy of the invention is calculated by weight percentage: 9.0-11.0% of silicon, 3.0-5.0% of zinc, 0.4-1.0% of magnesium, 2.0-3.0% of copper, manganese≤0.3%, and the rest is aluminum.

[0026] The strengthening method of cast aluminum-silicon alloy of the present invention comprises the following steps:

[0027] 1) Smelting

[0028] A. Loading

[0029] The order of charging is: aluminum-silicon master alloy, pure aluminum ingot, aluminum-copper master alloy, aluminum-manganese master alloy, zinc ingot, and the zinc ingot is added at 660°C after the furnace charge is melted;

[0030] B. Melting and refining

[0031] After the charge is loaded, heat up and melt. After the charge is completely melted, remove the slag and add flux; when the temperature reaches 680°C, use ...

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Abstract

The invention discloses a casting aluminum-silicon alloy. The casting aluminum-silicon alloy comprises the following chemical components by weight percent: 9.0-11.0% of silicon, 3.0-5.0% of zinc, 0.4-1.0% of magnesium, 2.0-3.0% of copper, less than or equal to 0.3% of manganese and the balance of aluminum. The invention also discloses a strengthening method for casting the casting aluminum-silicon alloy. The method comprises the following steps: 1) adopting the smelting process: A) charging, B) melting and refining, C) performing modification, and D) pouring; and 2) performing heat treatment:A) performing solution treatment and performing aging treatment. By adopting the strengthening method, after the aging treatment, the number of strengthening phases can be increased and the strengthening phases with a good strengthening effect can be obtained; by adopting dispersion strengthening, the material can have higher strength and hardness than ZL108; because of the reduction of the hard and brittle silicon phase in the structure, the plasticity of the material is increased, the casting performance of the material is good and the product quality and dimensional accuracy of the castingare high. The application range of the casting aluminum-silicon alloy can be expanded.

Description

technical field [0001] The invention relates to a non-ferrous alloy material and a strengthening method, in particular to a strengthening method of a cast aluminum-silicon alloy, belonging to the technical field of metal materials. Background technique [0002] Cast aluminum-silicon alloy is a non-ferrous alloy material with light weight and high strength, which is widely used in aerospace, automobile, electric power, military industry, machinery and other fields. The most widely used cast aluminum alloys are cast aluminum-silicon alloys including ZL108. They have a series of advantages such as small bulk density, high strength, good casting formability and excellent processing performance, and have become the most valued in the manufacturing industry. One of the structural materials. However, the as-cast mechanical properties of cast Al-Si alloys are not satisfactory at present. Although the mechanical properties can be improved by heat treatment, it still cannot meet the ...

Claims

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Application Information

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IPC IPC(8): C22C21/04C22C1/03C22F1/043
Inventor 纪嘉明鲁远勇吴晶虞建平
Owner 镇江汇通金属成型有限公司
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