JPS6037849B

A process for improving decarburization resistance of chrome-molybdenum steel in sodium is provided which comprises subjecting the chrome-molybdenum steel to cold working to attain a working ratio of not less than 5%, thereby forming numerous nuclei for carbide formation in the steel material, and h...

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Bibliographische Detailangaben
Hauptverfasser:	AOKI NORICHIKA, NAKASUJI TAKASHI, HASEGAWA SHIGEO, YUZUHARA SHUNICHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY 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
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Zusammenfassung:	A process for improving decarburization resistance of chrome-molybdenum steel in sodium is provided which comprises subjecting the chrome-molybdenum steel to cold working to attain a working ratio of not less than 5%, thereby forming numerous nuclei for carbide formation in the steel material, and heat-treating the cold-worked steel to form stable, fine carbide particles. Alternatively, by subjecting the steel material to warm working at a temperature of 600 DEG to 750 DEG C., both the working step and the heat treatment step can be accomplished in one step.