Sheet cooling in a roller quenching machine

Abstract

The temperature over the thickness and width of the quenched sheet is studied experimentally in the roller quenching machine at OAO Severstal’. The result permits industrial assessment of the efficiency of the first header with slotted nozzle and subsequent sections with flat spray nozzles. In addition, the length of the active water layer at the lower sheet surface may be estimated, and the optimal ratio of the flow rates in upper and lower cooling may be analyzed. The conclusions may be employed in developing the design, technology and software for automated control systems used in the heat treatment of steel sheet.