| 摘要 |
Ferrous material has C below 0.20 wt.% and Nb 0.025-0.065 wt.%, rest Fe, and has an appropriate shape for hot reduction. It is heated to max. 1175 degrees C. and reduced to plate thickness at a temp. above the A3 critical point. Pref., it contains 0.90-1.50 wt.% Mn, and is a killed or semi-killed steel. |
