Grain-oriented magnetic steel sheet having no undercoat film...

Details Grain-oriented magnetic steel sheet having no undercoat film... Grain-oriented magnetic steel sheet having no undercoat film...

2005-09-13

2005-09-13

Sheehan, John P. (Department: 1742)

Metal treatment

Stock

Magnetic

C148S307000

Reexamination Certificate

active

06942740

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.

REFERENCES:
patent: 6248185 (2001-06-01), Kondo et al.
patent: 0 997 540 (2000-05-01), None
patent: 1 004 680 (2000-05-01), None
patent: 1 108 794 (2001-06-01), None
patent: 08 134542 (1996-05-01), None

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