Method of heat treating an amorphous soft magnetic article

Details Method of heat treating an amorphous soft magnetic article Method of heat treating an amorphous soft magnetic article

1995-03-17

1996-02-27

Sheehan, John

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148121, C21D 104

Patent

active

054945348

ABSTRACT:
Two-stage heat treatment is used to improve the initial permeability and core loss of a soft amorphous magnetic article. The first-stage heat treatment is performed at a temperature less than the curie temperature of the amorphous soft magnetic article by 0.degree.-50.degree. C. for 0-10 hours, while applying a static magnetic field which is larger than 1000 Oe in a first direction which is generally perpendicular to the direction the magnetic article is to be magnetized when used or measured. The second-stage heat treatment is performed at a temperature less than the crystallization temperature of the amorphous soft magnetic article by 0.degree.-100.degree. C. for 0-10 hours, while applying a static magnetic field which is between 50 Oe and 1000 Oe in the first direction. Prior to performing the second-stage heat treatment, the temperature is lowered to room temperature.

REFERENCES:
patent: 4769091 (1988-09-01), Yoshizawa et al.

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