NOZZLE AND STRUCTURE OF NOZZLE AND STOPPER

Provided is a nozzle or a stopper having a gas blowing function, which is capable of preventing irregular breaking to be triggered by a gas outlet or a gas passage path communicated with the gas outlet, or, even in the 20 77 0442.0vent of breaking, preventing expansion of the breaking, and a combina...

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Bibliographische Detailangaben
Hauptverfasser:	KAKU, Toshio, TACHIKAWA, Kouichi, FUKUNAGA, Shinichi
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING
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Beschreibung
Zusammenfassung:	Provided is a nozzle or a stopper having a gas blowing function, which is capable of preventing irregular breaking to be triggered by a gas outlet or a gas passage path communicated with the gas outlet, or, even in the 20 77 0442.0vent of breaking, preventing expansion of the breaking, and a combination of the nozzle and the stopper. The nozzle 2 comprises: a fitting engagement region refractory material layer 5A composed of a fitting engagement region refractory material; a nozzle body composed of a different refractory material from the fitting engagement region refractory material (main body refractory material 2A); and a gas outlet 8A provided in at least one boundary area 9 between the fitting engagement region refractory material layer 5A and the main body refractory material 2A in a surface of the nozzle contactable with molten steel.