| 摘要 |
PURPOSE:To manufacture a nonoriented electrical steel sheet with a small iron loss by holding a continuously cast slab contg. specified percentages of Si, Mn, P, Al, C, S, Ca and a rare earth element in Fe at a specified temp. under specified conditions and by hot rolling it at once. CONSTITUTION:A continuously cast hot slab consisting of 1.5-4% Si, 0.1-1.5% Mn, <=0.1% P, 0.2-2% Al, <=0.008% C, 0.003-0.015% S, 0.003-0.03% at least one of Ca and a rare earth element, and the balance essentially Fe is held at 900-1,150 deg.C for <=30min. It is hot rolled at once and cold rolled to obtain a steel sheet. Thus, the time for holding the slab at said temp. can be reduced. |
