HEAT-TREATMENT APPARATUS OF GRAIN-ORIENTED ELECTRICAL SHEETS

摘要

PURPOSE: A heat-treatment apparatus of a grain-oriented electrical steel sheet is provided to uniformly heat a coil by supplying internal atmosphere gas into the inside space of an inner cover after the internal atmosphere gas is preheated by being moved upward of the inner cover. CONSTITUTION: A heat-treatment apparatus of a grain-oriented electrical steel sheet includes a base plate(100), an inner cover(200), a gas supplying unit(300), and a support unit(500). A coil is placed on the base plate. The lower edge part of inner cover is coupled to the edge part of the base plate so as to surround the coil so as to be sealed. The gas supplying unit is mounted on the base plate so as to induce internal atmosphere gas to the inner upper portion of the inner cover. The support unit supports the lower portion of the base plate.