Annealing method of 3Cr17NiMo electroslag ingot

The invention provides an annealing method of a 3Cr17NiMo electroslag ingot. The annealing method comprises the following steps that the 3Cr17NiMo electroslag ingot is demolded, and then annealing is conducted; the annealing method comprises the following steps that the heat preservation of a demold...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG LING, QU XIAOKE, SUN WENLING, TANG JIALI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALLOYS CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention provides an annealing method of a 3Cr17NiMo electroslag ingot. The annealing method comprises the following steps that the 3Cr17NiMo electroslag ingot is demolded, and then annealing is conducted; the annealing method comprises the following steps that the heat preservation of a demolded product is conducted at 605-635 DEG C for 4.6-5.0 hours; then first cooling is conducted and the temperature reaches to 185-200 DEG C, then the temperature is raised to 750-770 DEG C, and the heat preservation is conducted for 20-22 hours; then secondary cooling is conducted and the temperature reaches to 80-120 DEG C, then the temperature is raised to 750-770 DEG C, and the heat preservation for is conducted for 20-22 hours; and third cooling is conducted and the temperature is less than or equal to 400 DEG C, and discharging is conducted. According to the annealing method, the charging furnace temperature of the electroslag ingot is controlled to be 605-635 DEG C, the heat preservation is conducted for 4.6-5.0