Microcrystalline alloy, method for production of the same, apparatus for production of the same, and method for production of casting of the same
First Claim
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1. A method for the production of an alloy that has a microcrystalline structure, comprising:
- a melting step in which an alloy is melted to obtain an alloy melt;
a cooling step, during which a pressure is applied using ultrasonic cavitation that is generated in the alloy melt by applying ultrasonic vibration to the melt, to drop a temperature of the melt at or below an eutectic temperature of the alloy melt; and
a quenching step in which the alloy melt is quenched after the temperature of the alloy melt is cooled at or below the eutectic temperature, thereby a nonequilibrium α
-Al phase is crystallized,wherein the alloy is one of an Al—
Si alloy and an Al—
Mg alloy.
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Abstract
During a process of cooling a hypereutectic Al—Si alloy melt, ultrasonic vibration is applied to the melt to crystallize primary crystal α-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).
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Citations
6 Claims
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1. A method for the production of an alloy that has a microcrystalline structure, comprising:
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a melting step in which an alloy is melted to obtain an alloy melt; a cooling step, during which a pressure is applied using ultrasonic cavitation that is generated in the alloy melt by applying ultrasonic vibration to the melt, to drop a temperature of the melt at or below an eutectic temperature of the alloy melt; and a quenching step in which the alloy melt is quenched after the temperature of the alloy melt is cooled at or below the eutectic temperature, thereby a nonequilibrium α
-Al phase is crystallized,wherein the alloy is one of an Al—
Si alloy and an Al—
Mg alloy. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification