Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Reexamination Certificate
2008-05-13
2008-05-13
Sheehan, John P. (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
C148S113000
Reexamination Certificate
active
07371291
ABSTRACT:
A grain oriented electromagnetic steel sheet is free from an undercoating mainly composed of forsterite (Mg2SiO4), excellent in processability and magnetic properties and useful to production cost, and has a composition containing, by % by mass, 2.0 to 8.0% of Si, wherein secondary recrystallized grains contains fine crystal grains having a grain diameter of 0.15 mm to 0.50 mm at a rate of 2 grains/cm2or more. In the process of producing the steel sheet, inhibitors are not utilized, and the fine crystal grains are achieved by high purification and low temperature final annealing.
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Hayakawa Yasuyuki
Imamura Takeshi
Kurosawa Mitsumasa
Okabe Seiji
DLA Piper (US) LLP
JFE Steel Corporation
Sheehan John P.
LandOfFree
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