Patent ID: 7371291

Claim:
A method of producing a grain oriented electromagnetic steel sheet having excellent magnetic properties without an undercoating mainly composed of forsterite comprising: hot-rolling a steel slab having a composition that is substantially free of inhibitors and contains, by % by mass, 0.08% or less of C, 1.0 to 8.0% of Si, and 0.005 to 3.0% of Mn, and Al and N each decreased to 0.020% or less and 50 ppm or less, respectively; annealing the hot-rolled sheet according to demand; cold-rolling the sheet once, or twice or more with intermediate annealing performed therebetween; recrystallization annealing the cold-rolled sheet; and final batch annealing the sheet at a temperature of 1000° C. or lower in a low oxidizing or non-oxidizing atmosphere having a dew point of 40° C. or lower after an annealing separator not containing MgO is coated according to demand.