公开(公告)号：US20240271259A1

公开(公告)日：2024-08-15

申请号：US18568922

申请日：2022-10-24

申请人： MITSUBISHI STEEL MFG. CO., LTD.

发明人： Tetsuji SHISEKI ,  Michitaka AIHARA ,  Keita KUME ,  Seiichi SAITO

IPC分类号： C22C38/34 ,  B22F9/08

CPC分类号： C22C38/34 ,  B22F9/082 ,  B22F2009/0848 ,  B22F2207/01

摘要： An Fe—Cr—Si-based soft magnetic alloy powder is provided in which the Cr weight ratio of Cr contained in the alloy powder gradually decreases from the surface of the alloy powder to a predetermined depth in the depth direction, the amount contained of Si is in the range of 3 to 6.5% by weight, the amount contained of Cr may be in the range of 1 to 5% by weight, at least one of Mn, P, S, and O may be further contained, the weight ratio of Cr oxide/metal Cr may gradually decrease from the surface of the alloy powder in the depth direction, and loss in the soft magnetic alloy powder used in a dust core is reduced so as to be able to cope with higher frequencies and larger currents.