ORIENTED ELECTROMAGNETIC STEEL PLATE

• Main Authors: NAKAMURA Shuichi, TAKATANI Shinsuke, TAKEBAYASHI Seiki, USHIGAMI Yoshiyuki, FUJII Hiroyasu
• Format: Patent
• Language: English; French; Japanese
• Published: 17.01.2019
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INDUCTANCES; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; 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; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSFORMERS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

This oriented electromagnetic steel plate is provided with a base material steel sheet, an intermediate layer arranged in contact with the base material steel sheet, and an insulating film arranged in contact with the intermediate layer so as to become the topmost surface. Viewed on a cut surface in which the cutting direction is parallel to the plate thickness direction, the insulating film has a crystalline phosphide-containing layer that contains crystalline phosphides in a region in contact with the intermediate layer. Cette invention concerne une tôle d'acier électromagnétique à grains orientés, comprenant une tôle d'acier de matériau de base, une couche intermédiaire disposée en contact avec la tôle d'acier de matériau de base, et un film isolant disposé en contact avec la couche intermédiaire de façon à former la surface supérieure. Vu sur une surface de coupe dans laquelle la direction de coupe est parallèle à la direction de l'épaisseur de la tôle, le film isolant a une couche contenant du phosphure cristallin qui contient des phosphures cristallins dans une région en contact avec la couche intermédiaire. この方向性電磁鋼板は、母材鋼板と、母材鋼板上に接して配された中間層と、中間層上に接して配されて最表面となる絶縁皮膜とを有し、切断方向が板厚方向と平行となる切断面で見たとき、上記の絶縁皮膜が、中間層上に接する領域に、結晶性燐化物を含有する結晶性燐化物含有層を有する。