NON-ORIENTED ELECTROMAGNETIC STEEL SHEET AND PRODUCTION METHOD OF NON-ORIENTED ELECTROMAGNETIC STEEL SHEET

• Main Authors: NATORI Yoshiaki, MATSUMOTO Takuya, YASHIKI Hiroyoshi, FUJITA Koji, MOROHOSHI Takashi, MIYAZAKI Masafumi, TAKEDA Kazutoshi, MUKAWA Susumu
• Format: Patent
• Language: English; French; German
• Published: 20.11.2019
• 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

A non-oriented electrical steel sheet contains, as a chemical composition, by mass%, C: more than 0% and 0.0050% or less, Si: 3.0% to 4.0%, Mn: 1.0% to 3.3%, P: more than 0% and less than 0.030%, S: more than 0% and 0.0050% or less, sol. Al: more than 0% and 0.0040% or less, N: more than 0% and 0.0040% or less, O: 0.0110% to 0.0350%, Sn: 0% to 0.050%, Sb: 0% to 0.050%, Ti: more than 0% and 0.0050% or less, and a remainder including Fe and impurities, in which Sn + Sb: 0.050% or less, Si - 0.5 x Mn: 2.0% or more, and an O content in a sheet thickness central portion excluding a surface layer portion which is a range from a front surface and a rear surface to a position of 10 µm in a depth direction is less than 0.0100%.