STEEL FOR USE AT LOW TEMPERATURES AND ITS MANUFACTURE

A low alloy steel substantially consisting of Ni-Cr-Cu-Nb system and further adding 0.01 to 0.10% rare earth metals or their alloy thereto, and then being as only hot-rolled by 30 to 80% rolling rate at a temperature of less than 950 DEG C. The steel exhibits absorption energy of at least 10kg-m at...

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Bibliographische Detailangaben
Hauptverfasser:	OSUKA, TATSUMI, SUGIYAMA, TADAO, MATSUBARA, HIROYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS 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 TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A low alloy steel substantially consisting of Ni-Cr-Cu-Nb system and further adding 0.01 to 0.10% rare earth metals or their alloy thereto, and then being as only hot-rolled by 30 to 80% rolling rate at a temperature of less than 950 DEG C. The steel exhibits absorption energy of at least 10kg-m at -20 DEG C and a DTC transition temperature of lower than -40 DEG C, if necessary, may be tempered at a temperature of 500 DEG to 680 DEG C to improve the properties.