APPARATUS AND METHOD FOR COOLING MAGNESIUM ALLOY SHEET

摘要

The present invention relates to an apparatus and a method for cooling a magnesium alloying sheet capable of increasing productivity and having excellent rolling performance by quickly cooling a magnesium alloying sheet at a predetermined temperature after heat-treating the magnesium alloying sheet casted into a thin plate. The method for cooling a magnesium alloying sheet includes: a step (a) of heat-treating a magnesium alloying sheet at a high temperature; a step (b) of uncoiling the hot magnesium alloying sheet wound around a first mandrel through heat-treatment; a step (c) of spraying air while passing the magnesium alloying sheet being uncoiled through an air spray; and a step (d) of coiling the magnesium alloying sheet passed through an air spray around the second mandrel. The hot magnesium alloying sheet is heat-treated in the step (a) about temperature of 400°C. The magnesium alloying sheet passed through the air spray in the step (c) is quickly cooled about temperature of 200°C.