Method for producing copper alloy materials for molds for continuous steel casting, and molds made of the materials

A method for producing copper alloy materials for molds for continuous steel casting and molds as produced by the method. The molds are highly resistant to thermal fatigue and are hardly cracked. To produce the materials, cast ingots of a copper-based chromium-zirconium alloy comprising from 0.2 to...

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Bibliographische Detailangaben
Hauptverfasser:	NOGAMI, KEISHI, MORIMOTO, TAKASHI, KOIDE, MASATO, KOSHIBA, YUTAKA
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS FOUNDRY MOULDING METALLURGY PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A method for producing copper alloy materials for molds for continuous steel casting and molds as produced by the method. The molds are highly resistant to thermal fatigue and are hardly cracked. To produce the materials, cast ingots of a copper-based chromium-zirconium alloy comprising from 0.2 to 1.5% by weight of Cr and from 0.02 to 0.2% by weight of Zr are heated at between 900 DEG C. and 1000 DEG C. for 30 minutes or longer and then rolled, while hot, at a reduction ratio of 60% or more to be at 850 DEG C. or higher at which the hot rolling is finished , and immediately after the hot rolling, these are rapidly cooled to 400 DEG C. or lower at a cooling rate of 10 DEG C./sec or more, and then aged at between 400 DEG C. and 520 DEG C. for from 1 hour to 5 hours.