METHOD FOR PRODUCING COMPOSITE SOFT MAGNETIC MATERIAL HAVING HIGH STRENGTH AND HIGH SPECIFIC RESISTANCE

摘要

Provided is a composite soft magnetic material having high strength and high specific resistance. There is provided a method of producing a composite soft magnetic material having high strength and high specific resistance, including: heating mixture powder having a composition containing 0.05-1 wt% of polyimide resin powder having an average particle diameter of 1 to 100 µm, 0.002-0.1 wt% of fine amide-based wax powder having an average particle diameter of 1 to 20 µm, and the balance composed of insulating film-coated soft magnetic powder obtained by forming an insulating film on the surface of soft magnetic powder, at a temperature of 60 to 110 °C; filling the heated mixture powder in a mold which is heated at a temperature of 100 to 150 °C; compacting the heated mixture powder at a molding pressure of 700 to 1200 MPa to obtain a compact; and curing the obtained compact at a temperature of 225 to 300 °C.