| 摘要 |
<p>The steel strip is heated to exceed the perlitic transformation onset temperature Ac1, held above this temperature for more than 10s, rapidly cooled to a temperature below 100 degrees C at more than 100 degrees C/s, subjected to low temperature treatment at 100 degrees C-300 degrees C for more than 10 s, and cooled to ambient temperature. Production of a low carbon, high aluminum steel strip comprises: (a) providing a steel strip containing (in wt.%) 0.022-0.035 C, 0.15-0.25 Mn, 0.040-0.070 Al, 0.0035-0.0060 N, and Fe and inevitable impurities the remainder; (b) first cold rolling the strip; (c) annealing the cold-rolled strip; and (d) secondary cold rolling the annealed strip. An Independent claim is included for the produced steel strip, in which the ultimate elongation is expressed in terms of the ultimate tensile strength.</p> |
