NON-ORIENTED ELECTROMAGNETIC STEEL SHEET

• Main Authors: FUJIKURA MASAHIRO, YAMAZAKI SHUICHI, MURAKAWA TESSHU, ARAMAKI TAKERO
• Format: Patent
• Language: English; Japanese
• Published: 04.10.2018
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INDUCTANCES; MAGNETS; METALLURGY; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PROBLEM TO BE SOLVED: To provide a non-oriented electromagnetic steel sheet achieving both of improvement of die stamping accuracy and low iron loss, and a manufacturing method therefor.SOLUTION: There is adopted a non-oriented electromagnetic steel sheet containing, by mass%, C:0.0030% or less, Si:2.0% to 4.0%, Al:0.1% to 3.0%, Mn:0.10% to 2.00%, P:0.09% or less, S:0.0050% or less, N:0.0050% or less, and the balance Fe with 0 impurity element, and having surface covering of an internal oxidation layer of a surface of 10 to 70% of all surface area and average internal oxidation layer thickness of an area where the internal oxidation layer exists of 0.5 μm to 10 μm.SELECTED DRAWING: None 【課題】打ち抜き精度の向上と低鉄損を両立する無方向性電磁鋼板、及びその製造方法を提供する。【解決手段】質量％で、Ｃ：０．００３０％以下、Ｓｉ：２．０％以上４．０％以下、Ａｌ：０．１％以上３．０％以下、Ｍｎ：０．１０％以上２．００％以下、Ｐ：０．０９％以下、Ｓ：０．００５０％以下、Ｎ：０．００５０％以下を含有し、残部Ｆｅおよび０不純物元素よりなり、表面の内部酸化層が覆う表面積が全表面積の１０〜７０％であり、内部酸化層のある領域の平均内部酸化層厚が０．５μｍ〜１０μｍであることを特徴とする無方向性電磁鋼板を採用する。【選択図】なし