VERFAHREN ZUR HERSTELLUNG EINES DUENNEN GUSSSTUECKES AUS ROSTFREIEM CR-STAHL.

摘要

The Cr-series stainless steel sheet heretofore produced by a method including annealing a hot-rolled strip for decomposing the alpha '-phase or gamma -transformed phase therein, can be produced by omitting this annealing. In the method according to the present invention, a thin casting is cooled from the solidification temperature to the end temperature of the gamma -phase-precipitation at a cooling speed at least equal to the air cooling-speed, thereby avoiding the gamma -phase-precipitation. Then, the precipitation treatment for precipitating the supersaturated C, N, and S, or the heating to the alpha + gamma dual phase-temperature region for precipitating the gamma -phase, is carried out.