COMPOSITE MAGNETIC MEMBER, PRODUCTION OF FERROMAGNETIC PART IN COMPOSITE MAGNETIC MEMBER AND FORMATION OF NONMAGNETIC PART IN COMPOSITE MAGNETIC MEMBER

摘要

PROBLEM TO BE SOLVED: To produce a composite magnetic member having a ferromagnetic part having soft magnetism excellent more than that of the conventional member and a nonmagnetic part having stable characteristics equal to those of the conventional member as to a composite magnetic member of a single material combining a ferromagnetic part and a nonmagnetic part, 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 the one composed of Fe-Cr- C alloy steel contg. 0.1 to 5.0% Al and having a ferromagnetic part in which the number of carbides of >=0.1 μm particle size is <=50 pieces in the area of 100 μm2, the ratio of the pieces of carbides of >=1.0 μm particle size to the pieces of the carbides is controlled to >=15%, and the maximum permeability is >=400 and a nonmagnetic part whose permeability is <=2.