Al-Si alloy having fine crystal structure, method for producing the same, device for producing the same, and method for producing the casting

摘要

During a process of cooling a hypereutectic AlSi alloy melt, ultrasonic vibration is applied to the melt to crystallize primary crystal -Al using, in combination, an ultrasonic transducer (8) that generates the ultrasonic vibration, an ultrasonic horn (7) that is connected to the ultrasonic transducer (8) and transmits the ultrasonic vibration in a specified direction, a treatment vessel (2) that holds the melt and is in contact with the ultrasonic horn (7), and a treatment vessel fixing device (3) that fixes the treatment vessel (2) by pressing the treatment vessel toward the ultrasonic horn (7).