Method for manufacturing of insulated soft magnetic metal...

Details Method for manufacturing of insulated soft magnetic metal... Method for manufacturing of insulated soft magnetic metal...

2011-01-18

2011-01-18

Sheehan, John P (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

C148S122000, C419S019000, C419S035000

Reexamination Certificate

active

07871474

ABSTRACT:
A method for manufacturing bodies formed from insulated soft magnetic metal powder by forming an insulating film of an inorganic substance on the surface of particles of a soft magnetic metal powder, compacting and molding the powder, then carrying out a heat treatment to provide a body formed from insulated soft magnetic metal powder the method comprising: compacting and molding the powder; then magnetically annealing the powder at a high temperature above the Curie temperature for the soft magnetic metal powder and below the threshold temperature at which the insulating film is destroyed in a non-oxidizing atmosphere, such as a vacuum, inert gas, or the like; and then carrying out a further heat treatment at a temperature of from 400° C. to 700° C. in an oxidizing atmosphere, such as air, or the like.

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