| 摘要 |
<p>A semi-processed non-oriented electromagnetic steel sheet having high magnetic flux density and low iron loss after stress relief annealing is obtained by: hot rolling and cold rolling a steel slab having a component composition that includes 0.005 mass% or less of C, 4 mass% or less of Si, 0.03-2 mass% of Mn, 0.2 mass% or less of P, 0.004 mass% or less of S, 2 mass% or less of Al, 0.004 mass% or less of N, 0.0010 mass% or less of Se, and a remainder of Fe and unavoidable impurities; and subsequently carrying out recrystallization annealing with an average temperature increase speed of 100 °C/s until 740 °C.</p> |
