Process for producing grain-oriented electrical steel sheet having excellent glass film and magnetic properties

摘要

PCT No. PCT/JP95/02346 Sec. 371 Date May 15, 1997 Sec. 102(e) Date May 15, 1997 PCT Filed Nov. 16, 1995 PCT Pub. No. WO96/15291 PCT Pub. Date May 23, 1996A process for producing a grain-oriented electrical steel sheet excellent in the glass film and the magnetic properties by coating a steel sheet with an annealing separator, finish annealing the steel sheet, and baking an insulating coating agent, which comprises coating the steel sheet having been decarburization annealed with an annealing separator prepared by allowing 100 parts by weight of MgO to contain, in the course from the step of producing MgO to the stage of preparing a slurry in the step of coating the steel sheet with MgO, halogens selected from F, Cl, Br and I or compounds of the halogens in an amount of 0.015 to 0.120 part by weight in terms of F, Cl, Br and I, and finish annealing the steel sheet.