| 摘要 |
<p>An object of the present invention is to provide a method of manufacturing non-oriented electromagnetic steel plates, which is capable of providing excellent particle growth characteristics of such steel plates in a final annealing step, whereby the excellent magnetic characteristics thereof can be obtained. Accordingly, the present invention is capable of facilitating the agglomeration and bulking of A1N particles in a hot rolled plate annealing step by subjecting the steel plate to low-temperature heating during the hot rolling thereof with a specific steel composition used, and thereby minimizing the re-solid-solution of A1N particles in a slab cooling step; reducing the rate of generation of scale by practicing a low-temperature take-up operation; and removing the scale completely by practicing a scale removing operation after the completion of the hot rolling step. The annealing of a hot rolled plate in a non-oxidizing atmosphere minimizes the oxidation and nitriding of the hot rolled plates during the annealing thereof. The conditions which enable the agglomeration and bulking of A1N particles to be effected in a suitable manner are controlled as required by the magnetic characteristics and cost efficiency of production of the steel plates.</p> |
