METHOD OF MANUFACTURING PARTICLE-DISPERSED Al ALLOY CAST

PROBLEM TO BE SOLVED: To provide a method, while carrying out the casting wherein returned materials from various places are utilized the exact rate of particle content of which materials is unknown, of manufacturing particle-dispersed Al alloy cast for which adjustment is easily and quickly made be...

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Hauptverfasser: UEDA YASUSHI, MIYAMOTO KATSUTOSHI
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method, while carrying out the casting wherein returned materials from various places are utilized the exact rate of particle content of which materials is unknown, of manufacturing particle-dispersed Al alloy cast for which adjustment is easily and quickly made before the furnace, so that is keeps a desired rate of particle content. SOLUTION: A returned material containing dispersed particles (whose rate of particle content is unknown) is melted, the molten metal is stirred for evenly scattering the dispersed particles, the specific gravity thereof is measured, the difference between the present rate of particle content thereof and the target rate of particle content is detected by applying the specific gravity to the regression formula prepared in advance using the specific gravity and rate of particle content typical of the particle- dispersed Al alloy cast, the molten metal is then left still while its temperature is kept so that the dispersed particles is separated from the mother material, namely, Al alloy molten metal, to be settled, then the calculated, desired quantity is removed from the upper layer of Al alloy molten metal, or a desired amount of Al alloy material is newly added for adjustment to make the rate of particle content the target rate of content, with the molten metal being stirred again for making the foregoing particles evenly dispersed to be poured into a cast thereafter.