| 摘要 |
According to the present invention, a directional electromagnetic steel sheet, which is remarkably reduced in iron loss, can be obtained by performing decarburization annealing as continuous annealing wherein a steel slab is heated to the temperature range of 700-750°C at a heating rate of 50°C/s or more at least from 500°C to 700°C, while setting the oxidizing property of the atmosphere P(H2O)/P(H2) to 0.05 or less, then cooled to the temperature range of lower than 700°C, while setting the oxidizing property of the atmosphere P(H2O)/P(H2) to 0.05 or less, and re-heated to and maintained in the temperature range of 800-900°C, while setting the oxidizing property of the atmosphere P(H2O)/P(H2) to 0.3 or more. |
