PRODUCTION OF SEMI-PROCESS NONORIENTED SILICON STEEL SHEET EXCELLENT IN ISOTROPIC MAGNETIC PROPERTY

PROBLEM TO BE SOLVED: To provide technology for producing a nonoriented silicon steel sheet having excellent isotropic magnetic properties by a skinpass rolling method. SOLUTION: Molten steel contg., by weight, <=0.01% C, <=4% Si, <=2% Al, <=1.5% Mn, <=0.3% P, <=0.02% S and <=0....

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Bibliographic Details
Main Authors SHIMAZU TAKAHIDE, MUNETA KOUJI
Format Patent
LanguageEnglish
Published 03.06.1997
Edition6
Subjects
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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Summary:PROBLEM TO BE SOLVED: To provide technology for producing a nonoriented silicon steel sheet having excellent isotropic magnetic properties by a skinpass rolling method. SOLUTION: Molten steel contg., by weight, <=0.01% C, <=4% Si, <=2% Al, <=1.5% Mn, <=0.3% P, <=0.02% S and <=0.005% N, and the balance Fe with inevitable components is subjected to continuous casting to form into a slab, which is subjected to hot rolling, and after that, the stages of pickling, intensive reduction cold rolling, annealing and skinpass rolling at 2 to 15% draft, the roughness of the steel sheet after the cold rolling is regulated to Ra: 0.7 to 3.0μm and the roughness of the steel sheet after the skinpass rolling is regulated to Ra: <=0.6μm. Furthermore, after the hot rolling, hot rolled sheet annealing is executed.
Bibliography:Application Number: JP19950308009