Publication: Heat transfer behavior of molten iron and nickel during the first 0.2 seconds of solidification
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Issued Date
2009
Resource Type
File Type
application/pdf
ISSN
9151559
Other identifier(s)
2-s2.0-72849137043
Rights Holder(s)
Scopus
Bibliographic Citation
ISIJ International. Vol 49, No.9 (2009), p.1347-1355
Suggested Citation
Todoroki H., Phinichka N. Heat transfer behavior of molten iron and nickel during the first 0.2 seconds of solidification. ISIJ International. Vol 49, No.9 (2009), p.1347-1355. doi:10.2355/isijinternational.49.1347 Retrieved from: https://hdl.handle.net/20.500.14740/7626
Author(s)
Abstract
This study aims at developing a fundamental understanding of the factors controlling strip casting. Heat transfer behavior of molten iron and nickel during the first 0.2 s of solidification has been clarified experimentally. The transient phenomena during solidification were successfully observed using a photo-sensor to measure cast surface temperatures and one wire thermocouple technique to measure the copper plate temperatures. T-type thermocouples were employed as one wire thermocouple method. The following results were obtained by this study. The molten metal ejected from a silica tube was kept as liquid state during the first 0.02 s along with undercooling after which recallescence took place. In addition, fluctuations in temperatures of the cast surface and inside the copper plate, that were co-related each other, were observed during recallescence. The copper plate temperature could catch up with the cast surface temperatures at the plate side thanks to one wire thermocouple technique where one constantan wire was set inside the copper plate. The peak values of heat fluxes were found to be higher with higher superheat of the molten metal. Almost constant values of 10000 (kW/m2) were obtained over 55°C while 3 500 (kW/m2) at 40°C in superheat. According to the results comparing the temperatures of the cast surface and the copper plate, the peak point of the heat flux physically implies how long molten metal state is kept as for solidification of metal.
Subject(s)
Cast surface
Copper plate
Heat transfer behavior
Liquid state
Molten iron
Molten metal
Peak values
Silica tubes
Strip Casting
Transient phenomenon
Atmospheric temperature
Copper
Crystallization
Heat exchangers
Heat flux
Heat transfer coefficients
Liquid metals
Metals
Molds
Nickel alloys
Silica
Solidification
Surface properties
Thermal effects
Thermocouples
Thermometers
Wire
Plate metal
Copper plate
Heat transfer behavior
Liquid state
Molten iron
Molten metal
Peak values
Silica tubes
Strip Casting
Transient phenomenon
Atmospheric temperature
Copper
Crystallization
Heat exchangers
Heat flux
Heat transfer coefficients
Liquid metals
Metals
Molds
Nickel alloys
Silica
Solidification
Surface properties
Thermal effects
Thermocouples
Thermometers
Wire
Plate metal