PREVENTING METHOD AGAINST EDGE ADHESION IN HIGH TEMPERATURE ANNEALING OF LOW TEMPERATURE REHEATING DIRECTIONAL ELECTRIC STEEL PLATE

摘要

PURPOSE: The method is to prevent steel plate edges from sticking together in a large roll of coil form in the final process of high temperature annealing when producing the directional electric steel plate. CONSTITUTION: The method reheats at the temperature of 1,250-1,340°C a silicon steel slab to hot roll and anneal at 1000 or less°C for softening the plate, and then cold-rolls twice including decarbon-annealing under a humid environment to the final thickness. The method further performs recover-annealing at a dry environment to coat a melt-fusion preventive agent and roll into a coil.