Continuous casting device for hypereutectic aluminum-silicon alloy and manufacturing method thereof

Abstract

The invention belongs to the metal material preparation and application technology field, and especially discloses a continuous casting device for hypereutectic aluminum-silicon alloy. The device is composed of a molten pool component and an electromagnetic stirring component used in cooperation with the molten pool component. The device has advantages that a large number of ''heterogeneous'' nucleation particles generated by a powdery or granular alterant serve as a ''core'' of crystallization of primary silicon, an effective nucleation rate of the primary silicon is increased, the primary silicon is refined, morphology of the primary silicon is changed, a primary silicon microstructure is refined, a use amount of the alterant is reduced, and cost is decreased; an electromagnetic stirrerand an airflow stir an alloy melt so that rapid dispersion strengthening of the alterant is promoted, and meanwhile, a temperature field and a component field of the alloy melt can be promoted to be more uniform; through arrangement of a powder spraying pipe connected with a powder spraying device, an influence of a skin effect of an electromagnetic field is avoided, distribution of the electromagnetic field is more uniform, and the temperature field and the component field of the alloy melt are more uniform too; and the hypereutectic aluminum-silicon alloy melt is treated, and a high-qualityhypereutectic aluminum-silicon alloy blank material can be obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of metal materials, and in particular relates to the connection of hypereutectic aluminum-silicon alloys. [0002] Casting device and its preparation method. Background technique [0003] Due to the advantages of light weight, high strength, high wear resistance, high heat resistance and low thermal expansion, A390 hypereutectic aluminum-silicon alloy blanks are usually used to manufacture key components such as pistons, rotors, and swash plates of automobile engines. Compared with conventional castings, it is not only lighter than ordinary iron castings, but also eliminates the structure segregation through the nodularization of silicon, and obtains uniform structure and fine grains through solution treatment, which can significantly improve the mechanical properties and thermal process properties of the alloy , is widely used in the automotive industry, especially in the app...

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Problems solved by technology

In the process of powder making process, the method of improving the morphology of primary silicon through the optimization of equipment, but at present, it is difficult to use the existing technology to completely control the morphology of primary silicon and make it spheroidized

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