| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve iron loss by enhancing the integration of the crystal orientation in a grain-oriented electromagnetic steel sheet with a mirror plane. <P>SOLUTION: In a process for manufacturing the grain-oriented electromagnetic steel sheet, which cold-rolls a steel strip containing, by mass, 0.8-4.8% Si, 0.003-0.1% C, 0.012-0.05% acid-soluble Al, and N≤0.01%, decarburization anneals it, applies a separation agent for annealing on it, and finishing anneals it, a method for manufacturing the grain-oriented electromagnetic steel sheet with high magnetic flux density and the mirror plane is characterized by carrying out the decarburization annealing in an atmosphere having such a degree of oxidation as not forming Fe-based oxides, to form an oxide layer mainly consisting of silica on a steel sheet surface, and then applying the separation agent for annealing mainly consisting of alumina, and by adding a boron compound to the agent. <P>COPYRIGHT: (C)2003,JPO |
