NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PRODUCING SAME

Abstract: provided is a non-oriented electrical steel sheet including a base metal having a chemical composition containing, by mass %, c: 0.0050% or less, si: more than 3.70% and 4.60% or less, mn: more than 0.20% and 0.50% or less, al: 0.23-0.75%, p: 0.030% or less, s: 0.0018% or less, n: 0.0040% or less, sn: 0.005-0.040%, sb: 0-0.040%, with a balance of fe and impurities, and satisfying [4.2≤si+al+0.5�mn≤4.9], wherein [n]s, an n content from the surface to 20 �m in depth of the base metal, is 0.0060% or less, an average crystal grain size of the base metal is 50 to 120 �m, a saturation magnetic flux density is 1.945t or more, a tensile strength is 600 mpa or more, and a sheet thickness is 0.10 to 0.30 mm.

Inventor(s): Hiroyoshi YASHIKI, Yoshiaki NATORI, Kazutoshi TAKEDA, Ichiro TANAKA, Hiroki HORI

CPC Classification: C21D9/46 (MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class and at least one process covered by this subclass ; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials ))

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