Method of making grain-oriented magnetic steel sheet having...

Details Method of making grain-oriented magnetic steel sheet having... Method of making grain-oriented magnetic steel sheet having...

2007-02-06

2007-02-06

Sheehan, John P. (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

C148S112000

Reissue Patent

active

10263573

ABSTRACT:
Grain-oriented magnetic steel sheet made by the method-including hot rolling and final finish annealing, wherein(1) the O content in the steel slab is limited to up to about 30 ppm;(2) for the entire steel sheet having final thickness including an oxide film before final finish annealing, from among impurities, the Al content is limited to up to about 100 wtppm, and the respective contents of B, V, Nb, Se, S,delete-start id="DEL-S-00001" date="20070206" ?P,delete-end id="DEL-S-00001" ?and N, to up to about 50 wtppm each; and(3) during final finish annealing, the N content in the steel is, at least in the temperature region of from about 850 to 950° C., limited within the range of from about 6 to 80 wtppm.

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