NOZZLE FOR CASTING

PROBLEM TO BE SOLVED: To prevent oxidation in a preheating stage of a nozzle for casting by restraining an antioxidant layer, which is arranged on an inner hole surface of the nozzle for casting, from being peeled off in the preheating stage.SOLUTION: In a nozzle 20 for casting, an intermediate laye...

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Bibliographic Details
Main Authors SASAKI AKINARI, MORIKAWA KATSUMI
Format Patent
LanguageEnglish
Published 26.09.2013
Subjects
CASTING
CASTING OF METALS
CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To prevent oxidation in a preheating stage of a nozzle for casting by restraining an antioxidant layer, which is arranged on an inner hole surface of the nozzle for casting, from being peeled off in the preheating stage.SOLUTION: In a nozzle 20 for casting, an intermediate layer 2 is provided on a part or the whole of a surface of a nozzle body refractory 1 having an inner hole 5 for allowing the passage of molten steel, and one or more antioxidant layers 3 densified by being vitrified in a temperature range of 400-1,500°C are formed on the outer surface of the intermediate layer 2. The intermediate layer 2 is a refractory in which inorganic fibers are intertwined with one another and coupled together by a carbonaceous binder, and has resistance to heat at 1,000°C or higher. The intermediate layer 2 and the nozzle body refractory 1 configure an integral structure in which matrix organizations of the mutual refractories continue into each other via an interface between them.
Bibliography:Application Number: JP20120055299