| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite magnetic member of a single material combining a ferromagnetic part and a nonmagnetic part, in which the ferromagnetic part has soft magnetism more excellent than that of the conventional member, and the nonmagnetic part has stable characteristics equal to those of the conventional member, to provide a method for producing the ferromagnetic part in the member and to provide a method for forming the nonmagnetic part. SOLUTION: This composite magnetic member is composed of Fe-Cr-C base alloy steel contg. 0.1 to 7.0% Si or Si and Al by 0.1 to 12.0% in total and has a ferromagnetic part in which the number of carbides having >=0.1 μm grain size is controlled to <=50 pieces in the area of 100 μm2, also the ratio of the number of the carbides having >=1.0 μm grain size to the number of the carbides to >=15%, and the maximum magnetic permeability to >=400 and a nonmagnetic part whose magnetic permeability is controlled to <=2. |
