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JP2021123768A 方向性電磁鋼板の製造方法および方向性電磁鋼板、ならびに焼鈍分離剤 审中-公开

方向性電磁鋼板の製造方法および方向性電磁鋼板、ならびに焼鈍分離剤
摘要：
【課題】被膜密着性と磁気特性の良好な方向性電鋼板の製造方法、および方向性電磁鋼板、ならびに焼鈍分離剤を提供する。 【解決手段】所定の成分組成を含有し、残部がFeおよび不純物からなるスラブを、1280℃以上に加熱して、熱間圧延を施すことで、熱延鋼板とする工程と、前記熱延鋼板に熱延板焼鈍を施した後、一回の冷間圧延または中間焼鈍を挟む二回以上の冷間圧延を施すことで、冷延鋼板とする工程と、脱炭焼鈍する工程と、脱炭鈍後の前記冷延鋼板の表面にTi化合物、希土類金属化合物、B化合物および所定の化合物を含有するMgOを主成分とする焼鈍分離剤を塗布した後、仕上焼鈍を施す工程と、仕上焼鈍後の鋼板に絶縁被膜を塗布した後、平坦化焼鈍を施す工程と、を含む、被膜密着性と磁気特性の良好な方向性電磁鋼板の製造方法。 【選択図】図2
摘要（英）：

To provide a method for producing a directional electromagnetic steel sheet having excellent film adhesion and magnetic characteristics, and a directional electromagnetic steel sheet, and an annealing separation agent.SOLUTION: There is provided a method for producing a directional electromagnetic steel sheet having excellent film adhesion and magnetic characteristics, including the steps of: heating a slab comprising a predetermined component composition and a remainder made up by Fe and an impurity to 1280°C or higher and then subjecting the heated slab to a hot-rolling procedure to produce a hot-rolled steel sheet; subjecting the hot-rolled steel sheet to a hot-rolled sheet annealing procedure and then subjecting the resultant product to one round of cold rolling procedure or two or more rounds of cold-rolling procedures including intermediate annealing to produce a cold-rolled steel sheet; decarburization-annealing the resultant steel sheet; applying an annealing separation agent whose main component is MgO containing a Ti compound, a rare earth metal compound, a B compound, and a predetermined compound onto a surface of the decarburization-annealed cold-rolled steel sheet and then subjecting the resultant steel sheet to a final annealing procedure; and applying an insulation coating film onto the final annealed steel sheet and then subjecting the resultant steel sheet to a flattening annealing procedure.SELECTED DRAWING: Figure 2

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