| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for surely avoiding middle wavy deformation generating in a finish-annealed inner rolled part of a coil, and for improving the product yield in manufacturing a grain-oriented electromagnetic steel sheet. SOLUTION: When hot-rolling a grain-oriented silicon steel slab, and cold- rolling it once or more times, then decarburization annealing it, applying a separation agent for annealing on the surface of the steel sheet, and finish annealing the coil in a batch type furnace, a cooling step in the above finish annealing is characterized by controlling a temperature difference along a circumferential direction in the inner rolled part of the coil to 20°C or less. COPYRIGHT: (C)2003,JPO
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