MOLTEN METAL TEMPERATURE CONTROL METHOD

摘要

A molten metal temperature control method includes: with respect to relations among a spheroidization distance traveled by a molten metal of an alloy from a nozzle tip to a position where the molten metal turns into droplets, the temperature of the molten metal inside the crucible, and a pressure acting on the molten metal inside the crucible, obtaining a relation between the temperature and the spheroidization distance at a predetermined pressure, and setting a predetermined temperature range of the temperature; measuring a spheroidization distance when discharging the molten metal from the crucible at the predetermined pressure, and specifying a temperature corresponding to the measured spheroidization distance; and comparing the specified temperature and the predetermined temperature range, and when the specified temperature is outside the predetermined temperature range, controlling the specified temperature so as to be within the predetermined temperature range by adjusting the temperature inside the crucible.

主权项

1. A molten metal temperature control method comprising:
with respect to relations among a spheroidization distance traveled by a molten metal of an alloy discharged from a nozzle of a crucible, with a predetermined nozzle diameter, from a nozzle tip to a position where the molten metal turns into droplets, the temperature of the molten metal inside the crucible, and a pressure acting on the molten metal inside the crucible, obtaining in advance a relation between the temperature and the spheroidization distance at a predetermined pressure that is the pressure acting on the molten metal inside the crucible, and setting a predetermined temperature range of the temperature; measuring the spheroidization distance when discharging the molten metal from the crucible at the predetermined pressure, and specifying the temperature corresponding to the measured spheroidization distance; and comparing the specified temperature and the predetermined temperature range, and when the specified temperature is outside the predetermined temperature range, controlling the specified temperature so as to be within the predetermined temperature range by adjusting the temperature inside the crucible.