| 摘要 |
<P>PROBLEM TO BE SOLVED: To provided a grain oriented electrical steel sheet which is drastically improved in a magnetic flux density by highly arranging the orientation of secondary grains into ä110}<001> orientation by firstly, generating the secondary grains having extremely high orientation degree to ä110}<001> direction under high probability, and then preferentially growing up the secondary grains in this direction by a simple and easily controllable method. <P>SOLUTION: When the grain oriented electrical steel sheet is manufactured, as the raw material, a silicon steel slab composed by mass% of 0.005-0.15% C, 2.5-4.5% Si, 0.05-0.15% Mn and one or two selected from 0.0005-0.05% S and 0.005-0.05% Se, and the balance Fe with inevitable impurities, is used, and in a coating process of an annealing separating agent containing MgO the main component and ≥5.5 mass part S compound interms of S based on 100 mass% MgO, this agent is coated, and thereafter, a secondary crystallizing annealing is applied while giving the temperature grade to the steel sheet. <P>COPYRIGHT: (C)2010,JPO&INPIT |
