METHOD FOR PRODUCING SOFT MAGNETIC METAL POWDER COATED WITH Mg-CONTAINING OXIDIZED FILM AND METHOD FOR PRODUCING COMPOSITE SOFT MAGNETIC MATERIAL USING SAID POWDER

摘要

A method for producing a composite soft magnetic metal powder coated with an Mg-containing oxidized film, which comprises providing a mixed powder by adding a Mg powder to a soft magnetic metal powder having been subjected to a heating treatment in an oxidizing atmosphere at a temperature of 40 to 500°C, followed by mixing, and heating the mixed powder or heating while rolling it in an inert or vacuum atmosphere at a temperature of 150 to 1100°C under a pressure of 1 x 10<SUP>-12</SUP> to 1 x 10<SUP>-1</SUP> MPa; and a method for producing a composite soft magnetic material which comprises using a composite soft magnetic metal powder coated with an Mg-containing oxidized film produced by the above method.