| 摘要 |
<p>It is intended to stably produce a high-strength nonoriented magnetic steel sheet having high strength and abrasion resistance and simultaneously having magnetic properties excelling in magnetic flux density and iron loss without any change from, for example, cold rolling performance, etc. of common magnetic steel sheets. There is provided a high-strength nonoriented magnetic steel sheet comprising, by mass, 0.06% or less of C, 0.2 to 6.5% of Si, 0.05 to 3.0% of Mn, 0.30% or less of P, 0.040% or less of S or Se, 2.50% or less of Al, 0.6 to 8.0% of Cu and 0.0040% or less of N, characterized in that a Cu metal phase of 0.1 mum or less diameter is contained in the interior of steel. There is further provided a worked part therefrom. In the process for production thereof, a heat treatment of maintaining heating at a temperature zone of 300 to 720˚C for 5 sec. or more is carried out.</p> |
