And a method of manufacturing the non-oriented electrical steel sheet magnetic properties of the 45 ° direction is excellent from the rolling direction

摘要

PROBLEM TO BE SOLVED: To provide a nonoriented silicon steel sheet in which magnetic properties in the direction of 45° from the rolling direction are particularly excellent, the average of the magnetic properties in the plane is high, and the anisotropy thereof in the plane is extremely reduced, and to provide its production method.;SOLUTION: The nonoriented silicon steel sheet has a composition comprising ≤0.040% C, 0.05 to 3.5% Si, ≤3.0% Mn, ≤3.5% Al, ≤0.055% S, ≤0.25% P and ≤0.040% N, and satisfying (B₀+B₉₀)/2-B₄₅≤0.040; wherein, regarding each variable, B₀, B₄₅ and B₉₀ denote the magnetic flux density/T in the directions of 0°, 45° and 90° from the rolling direction at the time of controlling induced current density to 5,000 A/m. In its production method, a molten steel is solidified into a slab with a thickness of ≥50 mm by casting, shearing strain is imparted thereto in the hot rolling temperature range of 500 to 850°C, cold rolling is performed as the rolled structure is left, and recrystallization annealing is performed.;COPYRIGHT: (C)2006,JPO&NCIPI