무방향성 전자 강판

• Main Authors: TAKAHASHI MASARU, MATSUI SHINICHI, YAMAMOTO MASAHIRO, ICHIE TAKERU, MURAKAMI FUMINOBU
• Format: Patent
• Language: Korean
• Published: 13.10.2020
• 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

이 무방향성 전자 강판은, 규소 강판과 절연 피막을 구비한다. 규소 강판의 판 두께를 t라 하고, 규소 강판의 표면으로부터 판 두께 방향으로 1/10t부, 1/5t부, 및 1/2t부의 3개소에 있어서의 AlN 석출물의 개수 밀도의 최댓값과 최솟값의 비율을 나타내는 PDR(PDR＝(최댓값－최솟값)/최솟값×100)이 50％ 이하이다. A non-oriented electrical steel sheet includes a silicon steel sheet and an insulation coating. When t is a thickness of the silicon steel sheet and when PDR is defined as (PDR = (maximum - minimum) / minimum × 100) which indicates a ratio concerned with maximum and minimum of number densities of AlN precipitates in three areas which are 1/10t area, 1/5t area, and 1/2t area from a surface of the silicon steel sheet along a thickness direction, the PDR is 50% or less.