ELECTRICAL STEEL SHEET

• Main Authors: YAMAZAKI, SHUICHI, TAKEDA, KAZUTOSHI, FUJII, HIROYASU, TAKAHASHI, MASARU, KANEHASHI, KOJI
• Format: Patent
• Language: English; French; Japanese
• Published: 30.06.2016
• Subjects: 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; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INDUCTANCES; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MAGNETS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSFORMERS; TRANSPORTING

This electrical steel sheet (1) includes an electrical steel parent material (2) and an insulation coating (3) formed on the surface of the parent material (2). The insulation coating (3) contains at least one type of phosphate selected from the group consisting of Al, Zn, Mg, and Ca. The phosphate exhibits, in a solid 31P-NMR spectrum, a specific peak with a vertex in the range of -26 ppm to -16 ppm, wherein the ratio of the integrated intensity of the specific peak to the integrated intensity of all the peaks in the solid 31P-NMR spectrum is 30% or more. Cette invention concerne une tôle d'acier électrique (1) comprenant un matériau parent d'acier électrique (2) et un revêtement isolant (3) formé sur la surface du matériau parent (2). Le revêtement isolant (3) contient au moins un type de phosphate choisi dans le groupe constitué de Al, Zn, Mg et Ca. Le phosphate présente, dans un spectre de RMN 31P à l'état solide, un pic spécifique avec un sommet dans la plage allant de -26 ppm à -16 ppm, le rapport de l'intensité intégrée du pic spécifique à l'intensité intégrée de tous les pics dans le spectre de RMN 31P du solide étant de 30 % ou plus. 　電磁鋼板（１）は、電磁鋼の母材（２）と、母材（２）の表面に形成された絶縁被膜（３）と、を含む。絶縁被膜（３）は、Ａｌ、Ｚｎ、Ｍｇ及びＣａからなる群から選択された１種以上のりん酸塩を含有する。りん酸塩は、固体３１Ｐ－ＮＭＲスペクトルにおいて、頂点が－２６ｐｐｍ～－１６ｐｐｍの範囲にある特定ピークを示し、特定ピークの積分強度の固体３１Ｐ－ＮＭＲスペクトルにおけるすべてのピークの積分強度に対する割合が３０％以上である。