MANUFACTURING METHOD OF TEXTURED ELECTRICAL STEEL PLATE, TEXTURED ELECTRICAL STEEL PLATE FOR STRIP CORE, AND STRIP CORE

摘要

FIELD: metallurgy.;SUBSTANCE: steel slab of the specified chemical composition is heated to temperature of 1280°C or higher and hot rolled. The produced hot-rolled plate is subject to annealing and further cold rolling. After cold rolling is finished, decarburising annealing of the cold-rolled plate, further coiling and final annealing is performed. Heating of the cold-rolled plate at decarburising annealing or prior to decarburising annealing is performed to the temperature of 800°C or higher than 900°C or less at the speed of 30°C/sec or more to 100°C/sec or less. At final annealing the steel plate is heated at the speed of 20°C/hour or less in the temperature range of 750°C or more to 1150°C or less.;EFFECT: increasing magnetic induction of a plate used in strip cores.;10 cl, 9 tbl, 2 dwg, 4 ex