Method of manufacturing grain oriented silicon steel sheets

Details Method of manufacturing grain oriented silicon steel sheets Method of manufacturing grain oriented silicon steel sheets

1992-09-24

1994-06-07

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148500, C21D 946

Patent

active

053186397

ABSTRACT:
Method of manufacturing a grain oriented silicon steel sheet. An annealing separating agent mainly composed of MgO is coated on a surface of a decarburized silicon steel sheet. The silicon steel sheet is subjected to secondary recrystallization annealing and then purification annealing. The annealing separating agent contains Ti oxide or a Ti compound which can be oxidized by heating. The purification annealing is conducted in steps. A non-oxidizing atmosphere having a high nitrogen concentration is present in one step. A hydrogen atmosphere having a low nitrogen concentration is present in a subsequent step.

REFERENCES:
patent: 4888066 (1989-12-01), Yoshitomi et al.

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