MANUFACTURE OF GRAIN-ORIENTED ELECTRICAL STEEL SHEET HAVING SUPERIOR MAGNETIC CHARACTERISTIC

PURPOSE:To improve the iron loss characteristics by holding a hot rolled silicon steel plate contg. specified amounts of Si, C, Al, Mn, N and S at a prescribed temp. between rapid cooling for annealing and first cold rolling when the steel plate is cold rolled and heat treated under prescribed condi...

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Bibliographische Detailangaben
Hauptverfasser:	YOSHITOMI YASUNARI, IWAYAMA KENZO
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS BASIC ELECTRIC ELEMENTS CHEMISTRY ELECTRICITY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INDUCTANCES MAGNETS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TRANSFORMERS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PURPOSE:To improve the iron loss characteristics by holding a hot rolled silicon steel plate contg. specified amounts of Si, C, Al, Mn, N and S at a prescribed temp. between rapid cooling for annealing and first cold rolling when the steel plate is cold rolled and heat treated under prescribed conditions. CONSTITUTION:A silicon steel contg., by weight, 2.5-4% Si, 0.03-0.1% C, 0.01-0.65% acid-sol. Al, 0.001-0.015% N, 0.02-0.3% Mn and 0.005-0.04% S is manufactured by refining. A hot rolled plate of the silicon steel is rapidly cooled to carry out annealing. The annealed steel plate is held at 50-300 deg.C for >=1min, cold rolled, process-annealed and finally cold rolled at a high draft of 80-95%. The resulting cold rolled steel sheet is subjected to decarburization annealing and final finish annealing.